CN216973016U - Airport assembled pavement structure adopting mortise and tenon joint - Google Patents
Airport assembled pavement structure adopting mortise and tenon joint Download PDFInfo
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- CN216973016U CN216973016U CN202220217889.9U CN202220217889U CN216973016U CN 216973016 U CN216973016 U CN 216973016U CN 202220217889 U CN202220217889 U CN 202220217889U CN 216973016 U CN216973016 U CN 216973016U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 30
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- 239000004568 cement Substances 0.000 claims abstract description 20
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 3
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- 230000002787 reinforcement Effects 0.000 claims description 19
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- 239000010410 layer Substances 0.000 claims description 8
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- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 3
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- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000011513 prestressed concrete Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
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- 238000005192 partition Methods 0.000 description 1
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Abstract
The utility model relates to an airport fabricated pavement structure adopting mortise and tenon joint, which comprises a prestressed system prefabricated cement concrete pavement slab, a mortise and tenon joint fixed connection structure and a mortise and tenon joint sliding connection structure, wherein the prestressed system prefabricated cement concrete pavement slab is provided with a plurality of prefabricated steel slabs; the structure utilizes a cement concrete pavement slab prefabricated by a bidirectional prestress system, and is connected into a whole through a longitudinally-arranged tenon-and-mortise fixed connection device and a transversely-arranged tenon-and-mortise sliding connection structure. The utility model obviously improves the durability of the pavement slab, and the repair scheme is simultaneously suitable for assembly and cast-in-place. The structure of the utility model can prolong the service life of the pavement slab.
Description
Technical Field
The utility model relates to the technical field of cement concrete pavements, in particular to a transverse and longitudinal connecting device and a method for an assembled type prefabricated prestressed cement concrete pavement for an airport runway.
Background
The traditional cast-in-place concrete pavement construction period is long, and is limited by conditions such as climate, traffic, materials and the like, so that the objective requirements of non-stop construction of military airport rush repair and rush repair, civil airport reconstruction and extension and rapid repair of pavement damage are difficult to meet. The fabricated cement concrete pavement has the advantages of high bearing capacity, simple construction process, fast open traffic and the like, is the optimal selection of an ideal method for rapidly paving and repairing the airport pavement and reducing the non-stop time, but the stress condition and the service life of the pavement are reduced due to the problems of stress concentration and the like caused by the influence of the transverse and longitudinal connection modes of the fabricated prefabricated pavement, and the common reinforced concrete fabricated pavement has large volume mass, lower bending strength and poorer durability, is not suitable for the airport pavement with higher grade, and seriously influences the engineering quality and the economic benefit of the airport pavement.
Therefore, in order to ensure the construction quality and the use effect of the prefabricated assembled cement concrete pavement, the technology and the connection mode of the prefabricated assembled concrete pavement need to be correspondingly improved, and the self weight of the prefabricated assembled concrete slab is reduced on the basis of not reducing the bearing capacity of the pavement by improving the transverse and longitudinal connection modes of the prefabricated assembled concrete panel, so that the technology is widely applied to rush repair and rush construction of highways and airport pavements.
Disclosure of Invention
Aiming at the problems, the utility model provides an airport fabricated pavement structure adopting mortise and tenon joint connection, which has stronger bending strength, adopts mortise and tenon joint sliding connection and mortise and tenon joint fixed connection respectively in the transverse direction and the longitudinal direction, can realize quick pavement and repair of airport pavement, and effectively reduces non-stop time.
The utility model is realized by adopting the following technical scheme.
An airport assembly type pavement structure adopting mortise and tenon joint comprises a pre-stressed system prefabricated cement concrete pavement panel, a mortise and tenon joint fixed connection structure and a mortise and tenon joint sliding connection structure;
the structure utilizes a cement concrete pavement slab prefabricated by a bidirectional prestress system, and is connected into a whole through a longitudinally-arranged tenon-and-mortise fixed connection device and a transversely-arranged tenon-and-mortise sliding connection structure.
The prestressed reinforcement arranged in the prefabricated cement concrete pavement slab adopts the arrangement of longitudinal double layers and transverse single layers; the longitudinal prestressed tendons are symmetrically arranged at the center of the cross section of the pavement slab, and the transverse prestressed tendons are arranged at the center line of the longitudinal section of the pavement slab. The prestressed cement concrete pavement slab can effectively reduce the thickness of the slab, is about 40% -60% of the thickness of a common pavement slab, obviously improves the durability of the pavement slab, and has the service life 5-8 times that of the traditional concrete pavement slab.
The tenon-and-mortise fixed connection structure comprises a tenon structure 101, a first mortise structure 102, a first fixing screw 103 and a first connecting steel bar 105; the tenon structure 101 is arranged inside the first mortise structure 102, and the tenon structure 101 is fixedly connected with the first mortise structure 102 through a first fixing screw 103; the first connecting steel bar 105 is arranged on the outer side of the first mortise structure 102 and is fixedly connected with the first mortise structure 102; the tenon structure 101 is in a dumbbell shape; comprising a first locking portion 101.1, a first locking portion 101.2, a connecting and fixing portion 101.3 arranged between the first locking portion 101.1 and the first locking portion 101.2; a first screw hole 101.4 is respectively arranged on the first locking part 101.1 and the first locking part 101.2 in a penetrating way; the structure of the mortise structure 102 is that the mortise structure comprises a first mortise piece 102.1 and a second mortise piece 102.2, and the first mortise piece 102.1 and the second mortise piece 102.2 have the same structure; the first mortise element 102.1 or the second mortise element 102.2 has a structure comprising a cavity part 102.3 and a surrounding edge for accommodating the first locking part 101.1 or the first locking part 101.2 in the mortise structure 101, a mortise element side wall 102.4 for relatively abutting and combining the first mortise element 102.1 and the second mortise element 102.2, a first clamping groove 102.5 formed in the mortise element side wall 102.4 from top to bottom, and a stabilizing part 102.6 arranged at the lower part of the cavity part 102.3; the tenon structure 101 is limited by the side wall 102.4 of the mortise and tenon component and is not separated from the position of the first clamping groove 102.5; the depth of the first clamping groove 102.5 is matched with the height of the tenon structure 1; the stabilizing part 102.6 is provided with a second screw hole 102.7 in a penetrating way from top to bottom; the first screw hole 101.4 and the second screw hole 102.7 are arranged up and down correspondingly; the first connecting steel bar 105 is a twisted steel bar. The tenon structure 101 further comprises a first gasket 104, wherein the first gasket 104 is sleeved on the first fixing screw 103 and is arranged at the upper part of the first screw hole 101.4; the washer 4 is a spring washer; the end of the first fixing screw 103 is provided with a chamfer. The depth of the first clamping groove 102.5 is half of the height of the first mortise structure 102. A gap is arranged between the tenon structure 101 and the first mortise structure 102. The first screw holes 101.4 are arranged to be long holes. The tenon structure 101, the first mortise structure 102, the first fixing screw 103 and the first connecting steel bar 105 are made of steel. The tenon structure 101 and the first mortise structure 102 can be made into standard parts for mass production. The first fixing screw 103 and the first washer 104 are made of national standard parts. Every mortise-tenon fixed connection structure is equipped with first fourth of twelve earthly branches structure 102 two, first connecting reinforcement 105 two, first fourth of twelve earthly branches structure 102 and first connecting reinforcement 105 adopt welded connection, in the prefabricated in-process of plate, bury first fourth of twelve earthly branches structure 102 and first connecting reinforcement 105 after welded connection in the pavement board, after pavement board hoist and mount to appointed position during the plate installation, insert tenon structure 101 in first fourth of twelve earthly branches structure 102, after penetrating first packing ring 104 and tenon structure 101's screw hole with screw rod 103 in proper order, screw in first fourth of twelve earthly branches structure 102's screw hole to fix tenon structure 101 on first fourth of twelve earthly branches structure 102, realize the connection of two prefabricated pavement boards. The tenon structure is symmetrical dumbbell type, has preset first fixed screw hole, fourth of the twelve earthly branches structure fixed slot. First fourth of the twelve earthly branches structure and first connecting reinforcement welded connection back pre-buried at prefabricated railway panel limit portion, railway panel hoist and mount to appointed position after, tenon structure fixed slot aligns fixed dog with fourth of the twelve earthly branches structure, inserts the tenon structure in the first fourth of the twelve earthly branches structure, penetrates the screw rod hole of tenon structure with the screw rod after, in the screw thread hole of the first fourth of the twelve earthly branches structure of screw in to fix the tenon structure on first fourth of the twelve earthly branches structure, make tenon fourth of the twelve earthly branches fixed connection possess the transmission vertical stress, and prevent first fourth of the twelve earthly branches structure and tenon structure between take place horizontal relative displacement, thereby realize the connection of two prefabricated railway panels.
The mortise and tenon sliding connection structure comprises a sliding tenon structure 201, a second mortise structure, a second fixing screw 204 and a second connecting steel bar 206; the sliding tenon structure 201 is arranged inside the second mortise structure; the sliding tenon structure 201 is fixedly connected with the second mortise structure through a second fixing screw 204; the second connecting steel bar 206 is arranged on the outer side of the second mortise structure and is fixedly connected with the second mortise structure; the structure of the sliding tenon structure 201 is that the sliding tenon structure is designed into a dumbbell shape; comprises a locking connection part 201.1, a sliding connection part 201.2, a connection fixing part 201.3 arranged between the locking connection part 201.1 and the sliding connection part 201.2; a third screw hole 201.4 is arranged on the locking connection part 201.1 in a penetrating way; a fourth screw hole 201.5 is arranged on the sliding connection part 201.2 in a penetrating way; the second mortise structure comprises a closed mortise structure 202 and an open mortise structure 203, and the first mortise part 202.1 and the second mortise part 202.2 have the same structure; the structure of the closed mortise structure 202 comprises a first cavity part 202.1 and a first surrounding edge 202.2 for accommodating the locking connection part 201.1 in the sliding tenon structure 201, a mortise side wall 202.3, a second clamping groove 202.4 formed in the mortise side wall 202.3 from top to bottom, and a first stabilizing part 202.5 arranged at the lower part of the first cavity part 202.1; the second clamping groove 202.4 limit locking connecting part 201.1 can not horizontally drop out; the first stabilizing part 202.5 is provided with a fifth screw hole 202.6 in a penetrating way from top to bottom; the depth of the clamping groove 202.5 is matched with the height of the sliding tenon structure 201; the structure of the open mortise structure 203 comprises a second cavity part 203.1 for accommodating the sliding connection part 201.2 in the sliding tenon structure 1, a second surrounding edge 203.4 and a second stabilizing part 203.2 arranged at the lower part of the second cavity part 203.1; the sliding connection part 201.2 is horizontally and movably connected in the second cavity part 203.1; the second stabilizing part 203.2 is provided with a sixth screw hole 203.3 in a penetrating way from top to bottom; the third screw hole 1.4 and the fifth screw hole 202.6 are arranged up and down correspondingly; the fourth screw hole 201.5 and the sixth screw hole 203.3 are arranged up and down correspondingly; the second connecting reinforcement 206 is a plain reinforcement. The sliding tenon structure 201 further comprises a second gasket 205, wherein the second gasket 205 is sleeved on the second fixing screw 204; the second washer 205 is a spring washer; the end of the second fixing screw 204 is provided with a chamfer. The depth of the second clamping groove 202.4 is half of the height of the second mortise structure. A gap is formed between the sliding tenon structure 201 and the second mortise structure; and the third screw holes 201.4 or the fourth screw holes 201.5 are arranged to be strip holes, wherein the length of the fourth screw holes 201.5 is greater than that of the third screw holes 201.4. The sliding tenon structure 201 and the second mortise structure can be made into standard parts for batch production. The second fixing screw 204 and the second washer 205 are made of national standard. In the plate prefabricating process, the closed mortise structure 202 and the second connecting steel bars 206 after being welded and connected, the open mortise structure 203 and the second connecting steel bars 206 are buried in the road panel, the road panel is hoisted to a specified position during plate installation, the sliding tenon structure 1 is inserted into the closed mortise structure 202 and the open mortise structure 203, the second fixing screw 204 is sequentially inserted into the screw holes of the second gasket 205 and the sliding tenon structure 201, the screw holes of the closed mortise structure 202 and the open mortise structure 203 are screwed in, the sliding tenon structure 201 is fixed on the closed mortise structure 202 at the moment, the open mortise structure 203 can slide in the screw holes of the sliding tenon structure 201 through the second fixing screw 204, and the sliding connection of the two prefabricated road panels is realized. The sliding tenon structure is of an asymmetric dumbbell shape, and is pre-provided with a fixed screw hole, a sliding screw hole and a tenon structure fixed clamping groove. Open-ended fourth of twelve earthly branches structure, respectively pre-buried at adjacent prefabricated road panel limit portion behind closed-ended fourth of twelve earthly branches structure and the second connecting reinforcement welded connection, insert the tenon structure that slides in closed-ended fourth of twelve earthly branches structure and the open-ended fourth of twelve earthly branches structure, penetrate the screw rod behind the screw rod hole of sliding tenon structure, the screw in is closed in the screw hole of open-ended fourth of twelve earthly branches structure and open-ended fourth of twelve earthly branches structure, the tenon structure of sliding this moment is fixed on closed-ended fourth of twelve earthly branches structure, and open-ended fourth of twelve earthly branches structure then can slide in the screw rod hole of second clamping screw on the sliding tenon structure, it is fixed to realize horizontal adjacent road panel one side, the collapsible deformation of opposite side, it possesses certain gliding ability to have when transmitting vertical stress to get tenon fourth of twelve earthly branches sliding connection, can effectively satisfy the temperature shrinkage deformation that road panel produced.
The gaps between the parts of the utility model are sealed by using a material (such as but not limited to silicone) with good sealing performance and durability, and the surface of the material can be selectively coated with paint with the color similar to that of the pavement slab.
The assembly type prestressed cement concrete pavement slab can adopt the production process of 'automatic assembly line and steam curing'. The main production process comprises the following steps: the method comprises the following steps of die table cleaning, die assembly, reinforcing steel bar manufacturing and installation, prestress application, concrete mixing, concrete forming, concrete curing, quality inspection and the like. The mature production process can be used for preparing the pavement slab more quickly and more environmentally friendly.
The tenon-and-mortise connection structure for airport pavement restoration has the advantages of simple structure, low manufacturing cost, convenience and rapidness in installation, good load transfer effect, low requirement on pavement panel installation precision, saving airport pavement restoration time and the like. The airport assembly type prestressed cement concrete pavement slab can be produced in batches by factories, is spliced on a base layer to form an airport pavement, has high strength, large bearing capacity and high construction speed, can effectively reduce the thickness of the slab, is about 40 to 60 percent of the thickness of a common pavement slab, obviously improves the durability of the pavement slab, and is suitable for assembly and cast-in-place simultaneously in a repairing scheme. The structure of the utility model can prolong the service life of the pavement slab.
The utility model is further explained below with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic view of a cross-section reinforcement of a pretensioned prestressing roadway panel;
FIG. 2 shows the spatial arrangement of the prestressed reinforcements;
FIG. 3 is a block diagram of the present invention;
FIG. 4 is a diagram of reinforcing bars for pre-stressed steel bars of a prefabricated pavement slab;
FIG. 5 is a schematic view of the overall structure of the mortise and tenon joint fixing and connecting structure of the present invention;
FIG. 6 is a schematic view of the tenon-and-mortise fixed connection structure of the present invention viewed from above;
FIG. 7 is a schematic longitudinal sectional view illustrating the mounting of the mortise and tenon fastening structure according to the present invention;
FIG. 8 is a schematic view of a tenon structure of the tenon-and-mortise fixed connection structure of the present invention;
FIG. 9 is a schematic diagram of a mortise structure of a mortise and tenon fixed connection structure according to the present invention;
FIG. 10 is a schematic view of the overall structure of the mortise and tenon sliding connection structure according to the present invention;
FIG. 11 is a schematic view of the mortise and tenon sliding connection structure of the present invention in plan view;
FIG. 12 is a schematic longitudinal sectional view of the mortise and tenon sliding connection structure according to the present invention;
FIG. 13 is a schematic view of a sliding tenon structure of the mortise and tenon sliding connection structure according to the present invention;
FIG. 14 is a schematic view of a closed mortise structure of the mortise-tenon sliding connection structure according to the present invention;
FIG. 15 is a schematic view of an open mortise structure of a mortise-tenon sliding connection structure according to the present invention;
FIG. 16 is a schematic view of the process flow of the airport assembled prestressed cement concrete pavement slab of the present invention.
Detailed Description
See fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, fig. 9, fig. 10, fig. 11, fig. 12, fig. 13, fig. 14, fig. 15, fig. 16.
The tenon-and-mortise fixed connection structure comprises a tenon structure 101, a first mortise structure 102, a first fixing screw 103 and a first connecting steel bar 105; the tenon structure 101 is arranged inside the first mortise structure 102, and the tenon structure 101 is fixedly connected with the first mortise structure 102 through a first fixing screw 103; the first connecting steel bars 105 are arranged on the outer side of the first mortise structure 102 and fixedly connected with the first mortise structure 102; the tenon structure 101 is in a dumbbell shape; comprising a first locking portion 101.1, a first locking portion 101.2, a connecting and fixing portion 101.3 arranged between the first locking portion 101.1 and the first locking portion 101.2; a first screw hole 101.4 is respectively arranged on the first locking part 101.1 and the first locking part 101.2 in a penetrating way; the structure of the mortise structure 102 is that the mortise structure comprises a first mortise piece 102.1 and a second mortise piece 102.2, and the first mortise piece 102.1 and the second mortise piece 102.2 have the same structure; the first mortise element 102.1 or the second mortise element 102.2 has a structure comprising a cavity part 102.3 and a surrounding edge for accommodating the first locking part 101.1 or the first locking part 101.2 in the mortise structure 101, a mortise element side wall 102.4 for relatively abutting and combining the first mortise element 102.1 and the second mortise element 102.2, a first clamping groove 102.5 formed in the mortise element side wall 102.4 from top to bottom, and a stabilizing part 102.6 arranged at the lower part of the cavity part 102.3; the tenon structure 101 is limited by the side wall 102.4 of the mortise and tenon component and is not separated from the position of the first clamping groove 102.5; the depth of the first clamping groove 102.5 is matched with the height of the tenon structure 1; the stabilizing part 102.6 is provided with a second screw hole 102.7 in a penetrating way from top to bottom; the first screw hole 101.4 and the second screw hole 102.7 are arranged up and down correspondingly; the first connecting steel bar 105 is a twisted steel bar. The tenon structure 101 further comprises a first gasket 104, wherein the first gasket 104 is sleeved on the first fixing screw 103 and is arranged at the upper part of the first screw hole 101.4; the washer 4 is a spring washer; the end of the first fixing screw 103 is provided with a chamfer. The depth of the first clamping groove 102.5 is half of the height of the first mortise structure 102. A gap is arranged between the tenon structure 101 and the first mortise structure 102. The first screw holes 101.4 are arranged to be long holes. The tenon structure 101, the first mortise structure 102, the first fixing screw 103 and the first connecting steel bar 105 are made of steel. The tenon structure 101 and the first mortise structure 102 can be made into standard parts for mass production. The first fixing screw 103 and the first washer 104 are made of national standard parts. Every mortise-tenon fixed connection structure is equipped with first fourth of twelve earthly branches structure 102 two, first connecting reinforcement 105 two, first fourth of twelve earthly branches structure 102 and first connecting reinforcement 105 adopt welded connection, in the prefabricated in-process of plate, bury first fourth of twelve earthly branches structure 102 and first connecting reinforcement 105 after welded connection in the pavement board, after pavement board hoist and mount to appointed position during the plate installation, insert tenon structure 101 in first fourth of twelve earthly branches structure 102, after penetrating first packing ring 104 and tenon structure 101's screw hole with screw rod 103 in proper order, screw in first fourth of twelve earthly branches structure 102's screw hole to fix tenon structure 101 on first fourth of twelve earthly branches structure 102, realize the connection of two prefabricated pavement boards. The tenon structure is symmetrical dumbbell type, has preset first fixed screw hole, fourth of the twelve earthly branches structure fixed slot. First fourth of the twelve earthly branches structure and first connecting reinforcement welded connection back pre-buried at prefabricated railway panel limit portion, railway panel hoist and mount to appointed position after, tenon structure fixed slot aligns fixed dog with fourth of the twelve earthly branches structure, inserts the tenon structure in the first fourth of the twelve earthly branches structure, penetrates the screw rod hole of tenon structure with the screw rod after, in the screw thread hole of the first fourth of the twelve earthly branches structure of screw in to fix the tenon structure on first fourth of the twelve earthly branches structure, make tenon fourth of the twelve earthly branches fixed connection possess the transmission vertical stress, and prevent first fourth of the twelve earthly branches structure and tenon structure between take place horizontal relative displacement, thereby realize the connection of two prefabricated railway panels.
The mortise and tenon sliding connection structure comprises a sliding tenon structure 201, a second mortise structure, a second fixing screw 204 and a second connecting steel bar 206; the sliding tenon structure 201 is arranged inside the second mortise structure; the sliding tenon structure 201 is fixedly connected with the second mortise structure through a second fixing screw 204; the second connecting steel bars 206 are arranged outside the second mortise structure and fixedly connected with the second mortise structure; the structure of the sliding tenon structure 201 is that the sliding tenon structure is designed into a dumbbell shape; comprises a locking connection part 201.1, a sliding connection part 201.2, a connection fixing part 201.3 arranged between the locking connection part 201.1 and the sliding connection part 201.2; a third screw hole 201.4 is arranged on the locking connection part 201.1 in a penetrating way; a fourth screw hole 201.5 is arranged on the sliding connection part 201.2 in a penetrating way; the second mortise structure comprises a closed mortise structure 202 and an open mortise structure 203, and the first mortise part 202.1 and the second mortise part 202.2 have the same structure; the structure of the closed mortise structure 202 comprises a first cavity part 202.1 and a first surrounding edge 202.2 for accommodating the locking connection part 201.1 in the sliding tenon structure 201, a mortise side wall 202.3, a second clamping groove 202.4 formed in the mortise side wall 202.3 from top to bottom, and a first stabilizing part 202.5 arranged at the lower part of the first cavity part 202.1; the second clamping groove 202.4 limit locking connecting part 201.1 can not horizontally drop out; the first stabilizing part 202.5 is provided with a fifth screw hole 202.6 in a penetrating way from top to bottom; the depth of the clamping groove 202.5 is matched with the height of the sliding tenon structure 201; the structure of the open mortise structure 203 comprises a second cavity part 203.1 for accommodating the sliding connection part 201.2 in the sliding tenon structure 1, a second surrounding edge 203.4 and a second stabilizing part 203.2 arranged at the lower part of the second cavity part 203.1; the sliding connection part 201.2 is horizontally and movably connected in the second cavity part 203.1; the second stabilizing part 203.2 is provided with a sixth screw hole 203.3 in a penetrating way from top to bottom; the third screw hole 1.4 and the fifth screw hole 202.6 are arranged up and down correspondingly; the fourth screw hole 201.5 and the sixth screw hole 203.3 are arranged up and down correspondingly; the second connecting steel bar 206 is a plain steel bar. The sliding tenon structure 201 further comprises a second gasket 205, wherein the second gasket 205 is sleeved on the second fixing screw 204; the second washer 205 is a spring washer; the end of the second fixing screw 204 is provided with a chamfer. The depth of the second clamping groove 202.4 is half of the height of the second mortise structure. Gaps are formed between the sliding tenon structure 201 and the second mortise structure; and the third screw holes 201.4 or the fourth screw holes 201.5 are arranged to be strip holes, wherein the length of the fourth screw holes 201.5 is greater than that of the third screw holes 201.4. The sliding tenon structure 201 and the second mortise structure can be made into standard parts for batch production. The second fixing screw 204 and the second washer 205 are made of national standard. In the plate prefabricating process, the closed mortise structure 202 and the second connecting steel bars 206 after being welded and connected, the open mortise structure 203 and the second connecting steel bars 206 are buried in the road panel, the road panel is hoisted to a specified position during plate installation, the sliding tenon structure 1 is inserted into the closed mortise structure 202 and the open mortise structure 203, the second fixing screw 204 is sequentially inserted into the screw holes of the second gasket 205 and the sliding tenon structure 201, the screw holes of the closed mortise structure 202 and the open mortise structure 203 are screwed in, the sliding tenon structure 201 is fixed on the closed mortise structure 202 at the moment, the open mortise structure 203 can slide in the screw holes of the sliding tenon structure 201 through the second fixing screw 204, and the sliding connection of the two prefabricated road panels is realized. The sliding tenon structure is of an asymmetric dumbbell shape, and is pre-provided with a fixed screw hole, a sliding screw hole and a tenon structure fixed clamping groove. Opening fourth of the twelve earthly branches structure, it is pre-buried at adjacent prefabricated road panel limit portion respectively behind closed fourth of the twelve earthly branches structure and the second connecting reinforcement welded connection, insert the tenon structure that will slide in closed fourth of the twelve earthly branches structure and the opening fourth of the twelve earthly branches structure, penetrate the screw rod behind the screw rod hole of sliding tenon structure, the screw in is closed fourth of the twelve earthly branches structure and the threaded hole of opening fourth of the twelve earthly branches structure, the tenon structure of sliding this moment is fixed at closed fourth of the twelve earthly branches structure, and opening fourth of the twelve earthly branches structure then can slide in the screw rod hole of second clamping screw on the sliding tenon structure, it is fixed to realize horizontal adjacent road panel one side, the collapsible deformation of opposite side, have certain gliding ability when obtaining tenon fourth of the twelve earthly branches sliding connection possesses transmission vertical stress, can effectively satisfy the temperature shrinkage deformation that road panel produced.
Example 1 prestressed reinforcement arrangement and tensioning
In order to prestress the fabricated deck slab, the prestressed tendons used spiral rib steel wires with a diameter of 10mm and a tensile strength of 1570MPa, and a tension control stress of 0.75fsk, i.e., 1177.5 MPa. Considering the 20% prestress loss, the effective prestress of the prestressed tendon is 942MPa, and the number of prestressed tendons on the prestressed concrete pavement can be determined, which is detailed in table 1 below.
Table 1 calculation of prestressed tendons for fabricated prestressed concrete slabs
| Direction of road surface | Prestressing compensation (MPa) | Diameter of prestressed tendon (mm) | Root number of |
| Longitudinal direction | 2.15 | 10 | 16 |
| Transverse direction | 0.40 | 10 | 6 |
After the number of the prestressed reinforcements is determined, reinforcing can be carried out on the pavement slab, and a longitudinal double-layer transverse single-layer arrangement scheme is adopted in consideration of the alternating characteristic of load bearing of the pavement slab. The longitudinal prestressed tendons are symmetrically arranged at the center of the cross section of the pavement slab, 8 longitudinal prestressed tendons are respectively arranged at the upper layer and the lower layer, the center distance is 80mm, and 16 longitudinal prestressed tendons are arranged; the transverse prestressed tendons are arranged on the central line of the longitudinal section of the pavement slab, and 6 transverse prestressed tendons are arranged. The prestressed tendon reinforcing bars on the section of the road surface plate are schematically shown in the figure.
The method for prestress tensioning of the steel bar is characterized by comprising the following specific steps of:
(1) and an automatic tensioning device is adopted, and tensioning records are automatically generated by a system.
(2) The longitudinal and transverse prestressed tendons of the pavement slab adopt a single-end single-joint simultaneous tensioning mode and are controlled by a single tensioning force value. The precision of the force sensor for controlling the tension force is not lower than 0.5 grade, and the self-correcting validity period is not more than 30 d.
(3) The longitudinal and transverse prestressed tendons adopt a single-end single-simultaneous tensioning mode and are controlled by a single tension value (93 kN). The prestressed tendons are tensioned uniformly, the loading rate is not more than 4kN/s, the load is kept for 1min when the tension force is designed, the deviation between the single tension force and the design tension force is +/-3%, and the prestressed tendons are locked.
(4) Before formal production, the prestressed tendon is subjected to effective tension force and uniformity tests after tensioning and locking. After the formal delivery, effective tension and uniformity tests should be performed again every 15000 road panels or half a year. The deviation between the single tension force and the design tension force is not more than +/-10.0%, and the deviation between the total tension force and the design tension force is not more than +/-3.0%.
EXAMPLE 2 field Assembly
(1) And (3) prefabricating the pavement slab by adopting an automatic assembly line and steam curing production process according to the plane size design and the reinforcement design of the assembled pavement. As shown in fig. 11, the main production process comprises: the method comprises the following steps of die table cleaning, die assembly, reinforcing steel bar manufacturing and installation, prestress application, concrete mixing, concrete forming, concrete curing, quality inspection and the like. Meanwhile, for meeting the requirements of rapid pavement and reducing grouting amount, the geotextile is arranged between the concrete road plate and the base layer before assembly construction.
(2) The airport fabricated cement concrete design and construction scheme is as follows: the prefabricated cement concrete pavement slabs (5.0 m multiplied by 2.5m multiplied by 0.2 m) are selected and paved orderly from the center of the airport runway to the periphery according to unit partitions (comprising six slabs) along the transverse and longitudinal directions.
(3) The road surface plate is hoisted to a designated position by adopting a vacuum sucker lifting appliance and a rubber-tyred gantry crane, after the road surface plate is leveled, the tenon structure is placed in the mortise and tenon structure, the tenon structure is fixedly connected with the mortise structure by using bolts, and finally grouting is carried out, so that the bottom of the assembled road surface plate is in good contact with the top surface of the base layer, and the assembled road surface plate is uniformly stressed and uniformly transferred.
The construction bin section is measured and calculated by 150m multiplied by 5.0m, the airport fabricated pavement structure adopting mortise and tenon connection is simple in construction process and easy to operate, and the construction progress is greatly improved. As shown in tables 2 and 3, compared with the cast-in-place concrete pavement which takes 17.4 days, the fabricated pavement adopting the prestressed pavement slab and the mortise and tenon connection structure only needs 22 hours from the beginning to the end of construction. Further, for an airport runway with a length of 2800m and a width of 45m, a total of 18 precast cement concrete pavement slabs (5.0 m × 2.5m × 0.2 m) are required in the transverse direction and 560 slabs are required in the longitudinal direction, which is 10080 precast slabs.
Table 2 assembled road surface construction schedule
TABLE 3 construction schedule of cast-in-situ concrete road surface
The foregoing is only a part of the specific embodiments of the present invention and specific details or common general knowledge in the schemes have not been described herein in more detail. It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and it is obvious for those skilled in the art that all the technical solutions obtained by using the equivalent substitution or the equivalent change fall within the protection scope of the present invention. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. An airport assembly type pavement structure adopting mortise and tenon joint is characterized by comprising a prestressed system prefabricated cement concrete pavement slab, a mortise and tenon joint fixed connection structure and a mortise and tenon joint sliding connection structure; the structure utilizes a cement concrete pavement slab prefabricated by a bidirectional prestress system, and is connected into a whole through a longitudinally-arranged tenon-and-mortise fixed connection device and a transversely-arranged tenon-and-mortise sliding connection structure.
2. The airport assembled pavement structure adopting mortise and tenon connection as claimed in claim 1, wherein the prestressed reinforcement arranged in the prefabricated cement concrete pavement slab adopts a longitudinal double-layer transverse single-layer arrangement; the longitudinal prestressed tendons are symmetrically arranged at the center of the cross section of the pavement slab, and the transverse prestressed tendons are arranged at the center line of the longitudinal section of the pavement slab.
3. The airport assembled pavement structure adopting mortise and tenon connection according to claim 1, wherein the mortise and tenon fixed connection structure comprises a tenon structure (101), a first mortise structure (102), a first fixing screw (103) and a first connecting steel bar (105); the tenon structure (101) is arranged in the first mortise structure (102), and the tenon structure (101) is fixedly connected with the first mortise structure (102) through a first fixing screw (103); the first connecting steel bar (105) is arranged on the outer side of the first mortise structure (102) and is fixedly connected with the first mortise structure (102); the tenon structure (101) is arranged in a dumbbell shape; comprising a first locking portion (101.1), a first locking portion (101.2), a connecting and fixing portion (101.3) arranged between the first locking portion (101.1) and the first locking portion (101.2); a first screw hole (101.4) is respectively arranged on the first locking part (101.1) and the first locking part (101.2) in a penetrating way; the first mortise structure (102) comprises a first mortise piece (102.1) and a second mortise piece (102.2), and the first mortise piece (102.1) and the second mortise piece (102.2) have the same structure; the structure of the first mortise piece (102.1) or the second mortise piece (102.2) comprises a cavity part (102.3) and a surrounding edge, wherein the cavity part (102.3) and the surrounding edge are accommodated by a first locking part (101.1) or a first locking part (101.2) in the tenon structure (101), a mortise piece side wall (102.4) formed by relatively abutting and combining the first mortise piece (102.1) and the second mortise piece (102.2), a first clamping groove (102.5) formed in the mortise piece side wall (102.4) from top to bottom, and a stabilizing part (102.6) arranged at the lower part of the cavity part (102.3); the tenon structure (101) is limited by the side wall (102.4) of the mortise and tenon member and is not separated from the position of the first clamping groove (102.5); the depth of the first clamping groove (102.5) is matched with the height of the tenon structure (101); the stabilizing part (102.6) is provided with a second screw hole (102.7) in a penetrating way from top to bottom; the first screw hole (101.4) and the second screw hole (102.7) are arranged up and down correspondingly; the first connecting reinforcing steel bars (105) are threaded reinforcing steel bars.
4. The airport assembled pavement structure adopting mortise and tenon connection as claimed in claim 3, wherein the tenon structure (101) further comprises a first gasket (104), the first gasket (104) is sleeved on the first fixing screw (103), and the upper part of the first screw hole (101.4); the first gasket (104) is a spring gasket; the end part of the first fixing screw rod (103) is provided with a chamfer.
5. The airport assembled pavement structure adopting mortise and tenon connection according to claim 3, wherein the depth of the first clamping groove (102.5) is half of the height of the first mortise structure (102).
6. The airport assembled pavement structure adopting mortise and tenon connection according to claim 3, wherein a gap is formed between the tenon structure (101) and the first mortise structure (102); the first screw rod hole (101.4) is a long hole.
7. The airport assembled pavement structure adopting mortise and tenon connection according to claim 1, wherein the mortise and tenon sliding connection structure comprises a sliding tenon structure (201), a second mortise structure, a second fixing screw (204) and a second connecting steel bar (206); the sliding tenon structure (201) is arranged inside the second mortise structure; the sliding tenon structure (201) is fixedly connected with the second mortise structure through a second fixing screw rod (204); the second connecting steel bar (206) is arranged on the outer side of the second mortise structure and is fixedly connected with the second mortise structure; the sliding tenon structure (201) is in a dumbbell shape; comprises a locking connection part (201.1), a sliding connection part (201.2), and a connection fixing part (201.3) arranged between the locking connection part (201.1) and the sliding connection part (201.2); a third screw hole (201.4) is arranged on the locking connection part (201.1) in a penetrating way; a fourth screw hole (201.5) is arranged on the sliding connection part (201.2) in a penetrating way; the second mortise structure comprises a closed mortise structure (202) and an open mortise structure (203), and the first mortise member (202.1) and the second mortise member (202.2) have the same structure; the structure of the closed mortise structure (202) comprises a first cavity part (202.1) and a first surrounding edge (202.2) which are accommodated by a locking connection part (201.1) in the sliding tenon structure (201), a mortise part side wall (202.3), a second clamping groove (202.4) which is formed in the mortise part side wall (202.3) from top to bottom, and a first stabilizing part (202.5) which is arranged at the lower part of the first cavity part (202.1); the second clamping groove (202.4) is limited, locked and connected with the connecting part (201.1) and cannot be horizontally separated; the first stabilizing part (202.5) is provided with a fifth screw hole (202.6) in a penetrating way from top to bottom; the depth of the clamping groove (202.5) is matched with the height of the sliding tenon structure (201); the structure of the open mortise structure (203) comprises a second cavity part (203.1) and a second surrounding edge (203.4) for accommodating a sliding connection part (201.2) in the sliding tenon structure (201), and a second stabilizing part (203.2) arranged at the lower part of the second cavity part (203.1); the sliding connection part (201.2) is horizontally and movably connected in the second cavity part (203.1); the second stabilizing part (203.2) is provided with a sixth screw hole (203.3) in a penetrating manner from top to bottom; the third screw hole (201.4) and the fifth screw hole (202.6) are arranged up and down correspondingly; the fourth screw hole (201.5) and the sixth screw hole (203.3) are arranged up and down correspondingly; the second connecting steel bar (206) is a plain steel bar.
8. The airport assembled pavement structure adopting mortise and tenon connection as claimed in claim 7, wherein the sliding tenon structure (201) further comprises a second washer (205), the second washer (205) is sleeved on the second fixing screw (204); the second washer (205) is a spring washer; the end part of the second fixing screw rod (204) is provided with a chamfer.
9. The airport assembled pavement structure adopting mortise and tenon connection of claim 7, wherein the depth of the second clamping groove (202.4) is half of the height of the second mortise structure.
10. The airport assembled pavement structure adopting mortise and tenon connection according to claim 7, wherein a gap is formed between the sliding tenon structure (201) and the second mortise structure; and the third screw hole (201.4) or the fourth screw hole (201.5) is arranged to be a long hole, wherein the length of the fourth screw hole (201.5) is greater than that of the third screw hole (201.4).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114318997A (en) * | 2022-01-26 | 2022-04-12 | 中国电建集团昆明勘测设计研究院有限公司 | Airport assembled pavement structure adopting mortise-tenon joint |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114318997A (en) * | 2022-01-26 | 2022-04-12 | 中国电建集团昆明勘测设计研究院有限公司 | Airport assembled pavement structure adopting mortise-tenon joint |
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