CN110029576B - Steel-free seamless bridge expansion joint device and construction process thereof - Google Patents
Steel-free seamless bridge expansion joint device and construction process thereof Download PDFInfo
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- CN110029576B CN110029576B CN201910451034.5A CN201910451034A CN110029576B CN 110029576 B CN110029576 B CN 110029576B CN 201910451034 A CN201910451034 A CN 201910451034A CN 110029576 B CN110029576 B CN 110029576B
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000010410 layer Substances 0.000 claims abstract description 250
- 239000010426 asphalt Substances 0.000 claims abstract description 50
- 239000012790 adhesive layer Substances 0.000 claims abstract description 22
- 239000002344 surface layer Substances 0.000 claims abstract description 22
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 11
- 238000009434 installation Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 7
- 239000002131 composite material Substances 0.000 claims abstract description 7
- 239000010959 steel Substances 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 claims abstract description 4
- 239000012791 sliding layer Substances 0.000 claims abstract description 4
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 25
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 25
- 241001330002 Bambuseae Species 0.000 claims description 25
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 25
- 239000011425 bamboo Substances 0.000 claims description 25
- 239000011094 fiberboard Substances 0.000 claims description 19
- 229910001220 stainless steel Inorganic materials 0.000 claims description 17
- 239000010935 stainless steel Substances 0.000 claims description 17
- 238000004873 anchoring Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 7
- 229920002748 Basalt fiber Polymers 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 6
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000001050 lubricating effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 239000011083 cement mortar Substances 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000007667 floating Methods 0.000 claims description 3
- 239000000565 sealant Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000009736 wetting Methods 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 2
- 239000004567 concrete Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000000969 carrier Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to a novel safe bridge expansion joint structure, in particular to a steel-free seamless bridge expansion joint device and a construction process thereof, mainly comprising a leveling layer, a waterproof layer, a telescopic layer, an adhesive layer, an asphalt paving layer and a wearing surface layer which are based on the bottom surface of a telescopic position of a beam body, wherein the leveling layer is a high-strength mortar layer, the waterproof layer is an asphalt waterproof protective sliding layer and is paved on the surfaces of the two leveling layers, the telescopic layer is a composite layer structure, and the telescopic layer comprises a telescopic carrier layer and stress release layers on two sides; the adhesive layer, the asphalt pavement layer and the wearing surface layer are sequentially paved on the telescopic layer, and the wearing layer comprises a stress release strip layer with the same thickness as the wearing layer; the invention has the advantages of safe and practical structural design, simple construction process, complete function of the expansion joint after construction, stable running of the vehicle, no load of the vehicle directly acting on the beam body or the expansion joint, short time consumption for installation and construction, convenient maintenance of the structure, environmental protection and energy saving, and capability of saving a large amount of steel and concrete materials.
Description
Technical Field
The invention relates to a novel safe bridge expansion joint structure, in particular to a steel-free seamless bridge expansion joint device and a construction process thereof.
Background
In the current bridge construction, in order to meet the requirement of expansion and contraction deformation of a bridge, expansion joints are arranged between two beam ends, between a beam end and a bridge abutment or at the hinge position of the bridge so as to meet the requirement of bridge deck deformation, the arrangement of the bridge expansion joints requires that the expansion joints can freely expand and contract in two directions parallel to and perpendicular to the axis of the bridge, the bridge expansion joints are firm and reliable, and vehicles should run smoothly without jump and noise during running, so that rainwater and garbage soil are prevented from being infiltrated and blocked; the displacement and the connection between the upper structures caused by the vehicle load and the bridge building materials are regulated through the bridge expansion joints, and if the expansion device of the skew bridge is destroyed once, the speed, the comfort and the safety of driving are seriously affected, and even serious driving safety accidents are caused.
The existing bridge expansion joint is basically manufactured by profile steel, then reinforced concrete is adopted to be installed at the expansion part of the bridge, and the expansion joint of any type can be manufactured only by the procedures of processing, manufacturing, transportation, hoisting, installation and the like; when the expansion joint is installed, the expansion joint is fixed by reinforcing steel bars, and then high-grade concrete is rammed, and the production and installation of the expansion joint in the process need a large amount of special steel and reinforced concrete, so that the expansion joint structure is easy to damage under the repeated action of driving load, and the same amount of nonrenewable garbage can be generated after the damage, and meanwhile, the repair process also needs the same amount of steel and reinforced concrete for repairing, and the repair time is long, so that the smooth traffic is seriously influenced.
The construction quality of the bridge expansion joint is greatly related to the construction process, particularly the expansion joint is required to be directly exposed outside in the construction process or after the construction is finished, and is extremely easy to damage due to direct contact with wheels.
Disclosure of Invention
In order to solve the problems, the invention aims to disclose a novel and safe bridge expansion joint structure, in particular to a steel-free seamless bridge expansion joint device and a construction process thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme: the steel-free seamless bridge expansion joint device is arranged between two beam ends and is characterized by mainly comprising a leveling layer, a waterproof layer, a telescopic layer, an adhesive layer, an asphalt paving layer and a wearing surface layer which are arranged from bottom to top based on the bottom surface of the telescopic position of a beam body, wherein the leveling layer is a high-strength mortar layer arranged at the bottom to bear the upper part, and the leveling layer is paved on the two beam ends at two sides of the expansion joint; the waterproof layer is an asphalt waterproof protection sliding layer and is paved on the surfaces of the two leveling layers; the telescopic layer is of a composite layer structure and comprises a telescopic carrier layer and stress release layers at two sides; the adhesive layer, the asphalt pavement layer and the wearing surface layer are sequentially paved on the telescopic layer, and the wearing layer also comprises a stress release strip layer with the same thickness.
Preferably, the leveling layer is a high-strength mortar layer with strength of C30.
Preferably, the waterproof layer is of a three-layer composite structure and sequentially comprises a high-elasticity high-viscosity SBS modified emulsified asphalt layer, a bidirectional basalt fiber cloth layer and a high-elasticity high-viscosity SBS modified emulsified asphalt layer from top to bottom, wherein the high-elasticity high-viscosity SBS modified emulsified asphalt layer is a lubricating structure surface.
Preferably, the telescopic carrier layer is formed by combining 4-8 bamboo fiber plates with the thickness of 1.5cm and stainless steel plates into a whole, one side of the whole is anchored on a beam body through bolts above one beam end to be an anchoring end, and the other side of the whole is placed above the waterproof layer of the other beam end to be a free sliding movable end.
Preferably, the movable end of the telescopic carrier layer is in an inverted ladder-shaped structure, and the length of each bamboo fiber board is gradually increased from bottom to top by 1-3 cm.
Preferably, the bottom bamboo fiber plate of the telescopic carrier layer is clamped and fixed through a stainless steel plate, and the thickness of the stainless steel plate is 1-3 mm.
Preferably, the stress release layer is a high-elasticity high-viscosity expansion joint filling adhesive layer, and is filled at two sides of the expansion carrier layer.
Preferably, the adhesive layer is a high-elasticity high-viscosity modified hot asphalt layer with the thickness of 1-2 mm, and the thickness of the asphalt pavement layer and the abrasion surface layer is 3-5 cm.
Preferably, the stress release strip layer of the wearing layer is arranged above the corresponding movable end, the width is 1-2 cm, and the thickness is the same as that of the wearing layer.
The construction process of the steel-free seamless bridge expansion joint device is characterized by mainly comprising the following steps of:
1) Cleaning the expansion joint position: the space from the reserved bottom surface of the expansion joint to the above is entirely chiseled, the bottom surface is chiseled as much as possible during cleaning, and floating dust on the surface is blown clean by a high-pressure fan;
2) Laying a leveling layer: firstly, pre-burying an anchor bolt at one side of a fixed end before pouring a leveling layer; wetting the paved contact surface by adopting water, and controlling the surface to be free of any clear water; then paving the bottom surface of the expansion joint by adopting quick high-strength cement mortar with C30 strength to form a leveling layer of the high-strength mortar, wherein the paving thickness is 1-5cm, and the surfaces of the leveling layers on two sides are controlled to keep the same horizontal position in the paving process; finally, after the paving is finished, adopting cotton felt or cotton cloth to spray water and preserve for 1.5-2 hours so as to form the strength of C30 in 2 hours;
3) Laying a waterproof layer: after the leveling layer is maintained, brushing a high-elasticity high-viscosity SBS modified emulsified asphalt layer with the thickness of 0.5-1 mm on the surface of the leveling layer, and then sequentially paving a bidirectional basalt fiber cloth layer and the high-elasticity high-viscosity SBS modified emulsified asphalt layer upwards;
4) Paving a telescopic carrier layer and arranging a stress release layer: firstly, manufacturing bamboo fiber plates and stainless steel plates of all layers according to the size of an expansion joint, assembling the bamboo fiber plates and the stainless steel plates layer by layer into a whole in advance, punching holes according to the positions of pre-embedded anchor bolts, then mounting a telescopic carrier layer on a waterproof layer, arranging stress release layers on two sides, pouring the stress release layers in a high-elasticity high-viscosity expansion joint pouring glue pouring mode, and finally fastening and anchoring the telescopic carrier layer by bolts;
5) Paving an adhesive layer: paving a layer of high-elasticity high-viscosity modified hot asphalt layer on the surface of the telescopic layer to form the telescopic layer, wherein the thickness of the telescopic layer is 1-2 mm;
6) Paving an asphalt pavement layer and a wearing surface layer, and arranging a stress release strip layer: paving asphalt mixture uniformly mixed on site on the surface of an adhesive layer by adopting a CTEC-5 cold mixing and paving process, compacting to form an asphalt paving layer and a wearing surface layer, paving, leveling with bridge deck traffic lanes on two sides, reserving a notch with the width of 1-2 cm on the surface of the wearing layer, pouring sealant special for expansion joints on the notch to form a stress release strip layer, and finally pouring a flat top surface;
7) After construction and installation are completed, traffic is opened after maintenance is carried out for 0.5-1 hour.
The beneficial effects of the invention are as follows: the invention aims to realize an expansion joint device which does not need a section steel product and has a seamless surface, the whole structure is designed safely and practically, the construction process is simple, the function of the expansion joint can be completed after the construction is completed, the vehicle is enabled to run stably, the load of the vehicle can not directly act on a beam body or the expansion joint, the installation and construction time is short, generally half a working day is required, the vehicle can be put into operation after 0.5-1 hour is required, the structure is convenient to maintain, the environment is protected, the energy is saved, and a large amount of steel and concrete materials can be saved.
The invention mainly adopts the leveling layer, the waterproof layer, the telescopic layer, the adhesive layer, the asphalt pavement layer and the abrasion surface layer to form the seamless steel-free expansion joint device in a combined and matched way, wherein the leveling layer provides a plane for bearing the telescopic layer, the waterproof layer is a waterproof and protective lubricating surface and mainly protects the telescopic carrier, and provides a durable elastic and lubricating slidable surface for the telescopic layer.
Drawings
Fig. 1 is a cross-sectional structural view of the present invention.
The drawings are marked with the following description: 1-leveling layer, 2-waterproof layer, 3-expansion layer, 4-adhesive layer, 5-asphalt pavement layer, 6-wearing surface layer, 31-expansion carrier layer, 32-stainless steel plate, 33-stress release layer and 61-stress release strip layer.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings:
the expansion joint device of the steel-free seamless bridge is arranged between two beam ends, and mainly comprises a leveling layer 1, a waterproof layer 2, a telescopic layer 3, an adhesive layer 4, an asphalt paving layer 5 and a wearing surface layer 6 which are arranged from bottom to top based on the bottom surface of the expansion position of a beam body, wherein the leveling layer 1 is a high-strength mortar layer arranged at the bottom to bear the upper part, and the two beam ends paved on two sides of the expansion joint form the leveling layer 1; the waterproof layer 2 is an asphalt waterproof protective sliding layer, and is paved on the surfaces of the two leveling layers 1, and the waterproof layer 2 on the surfaces of the two leveling layers 1 is horizontally paved; the telescopic layer 3 is of a composite layer structure, and the telescopic layer 3 comprises a telescopic carrier layer 31 and stress release layers 33 at two sides; the adhesive layer 4, the asphalt pavement layer 5 and the wearing surface layer 6 are sequentially paved on the telescopic layer 3, and the wearing layer also comprises a stress release strip layer 61 with the same thickness as the wearing layer;
further, the leveling layer 1 is a high-strength mortar layer with strength of C30, the leveling layer 1 is quick high-strength polymer mortar, and the strength can reach the strength of C30 within 2 hours so as to provide a plane for bearing the telescopic layer 3;
further, the waterproof layer 2 is of a three-layer composite structure, and sequentially comprises a high-elasticity high-viscosity SBS modified emulsified asphalt layer, a bidirectional basalt fiber cloth layer and a high-elasticity high-viscosity SBS modified emulsified asphalt layer from top to bottom, wherein the high-elasticity high-viscosity SBS modified emulsified asphalt layer is a lubricating structure surface, the waterproof layer 2 is mainly used for protecting a telescopic carrier, and a durable and elastic lubricating slidable surface is provided for the telescopic layer 3;
further, the telescopic carrier layer 31 is formed by combining 4-8 bamboo fiber boards with the thickness of 1.5cm and stainless steel plates 32 into a whole, one side of the whole is anchored on a beam body through bolts above one beam end to be an anchoring end, and the other side of the whole is placed above the waterproof layer 2 of the other beam end to be a free sliding movable end; the size of the bolt at the anchoring end is
Further, the movable end of the telescopic carrier layer 31 is in an inverted ladder-shaped structure, and the length of each bamboo fiber board is gradually increased from bottom to top by 1-3 cm;
further, the bottom bamboo fiber board of the telescopic carrier layer 31 is clamped and fixed by a stainless steel plate 32, and the thickness of the stainless steel plate 32 is 1-3 mm, so that the telescopic carrier at the anchoring end is firmer and more durable, and in the embodiment, each layer of fiber board is soaked by the anti-corrosion modified emulsified asphalt and then is installed after being soaked; the plane of the bolts at the anchoring end is arranged in a quincuncial shape, and the bolts at the free sliding end are also arranged in a quincuncial shape together with the telescopic carrier and are fixed in the beam body below the leveling layer 1, and only the telescopic carrier is anchored;
further, the stress release layer 33 is a high-elastic high-viscosity expansion joint filling glue layer, and is filled at two sides of the expansion carrier layer 31; filling all the spaces on two sides, leveling the upper surfaces of the telescopic carriers, releasing or absorbing strain when the telescopic carriers deform, and simultaneously protecting the telescopic carriers for durability;
further, the adhesive layer 4 is a high-elasticity high-viscosity modified hot asphalt layer with the thickness of 1-2 mm, and the thickness of the asphalt pavement layer 5 and the abrasion surface layer 6 is 3-5 cm; a CTEC-5 wearing layer structure adopting an on-site cold mixing and paving technology;
further, the stress releasing strip layer 61 of the wearing layer is arranged above the corresponding movable end, the width is 1-2 cm, and the thickness is the same as that of the wearing layer.
A construction process of a steel-free seamless bridge expansion joint device mainly comprises the following steps:
1) Cleaning the expansion joint position: the space from the reserved bottom surface of the expansion joint to the above is entirely chiseled, the bottom surface is chiseled as much as possible during cleaning, and floating dust on the surface is blown clean by a high-pressure fan; the way of performing the chisel cleaning may also be: chiseling the initial expansion joint expansion to the original reserved position of the initial expansion joint, and cleaning;
2) Laying a leveling layer 1: firstly, pre-burying an anchor bolt at one side of a fixed end before pouring a leveling layer 1; wetting the paved contact surface by adopting water, and controlling the surface to be free of any clear water; then, paving the bottom surface of the expansion joint by adopting quick high-strength cement mortar with C30 strength to form a leveling layer 1 of the high-strength mortar, wherein the paving thickness is 1-5cm, and the surfaces of the leveling layers 1 on two sides are controlled to keep the same horizontal position in the paving process; finally, after the paving is finished, adopting cotton felt or cotton cloth to spray water and preserve for 1.5-2 hours so as to form the strength of C30 in 2 hours;
3) Laying a waterproof layer 2: after the leveling layer 1 is cured, coating a high-elasticity high-viscosity SBS modified emulsified asphalt layer with the thickness of 0.5-1 mm on the surface of the leveling layer 1, and then paving a bidirectional basalt fiber cloth layer and the high-elasticity high-viscosity SBS modified emulsified asphalt layer upwards in sequence;
4) Lay down the telescoping carrier layer 31 and provide the stress relief layer 33: firstly, manufacturing bamboo fiber boards and stainless steel plates 32 of each layer according to the size of an expansion joint, then assembling the bamboo fiber boards and the stainless steel plates 32 layer by layer into a whole in advance, punching holes according to the positions of pre-embedded anchor bolts, then mounting a telescopic carrier layer 31 on a waterproof layer 2, arranging stress release layers 33 on two sides, pouring the stress release layers 33 in a high-elasticity high-viscosity expansion joint pouring glue pouring mode, and finally fastening and anchoring the telescopic carrier layer 31 by bolts; specifically, when the bamboo fiber boards and the stainless steel plates 32 are preassembled into a whole, marking the position of each layer of bamboo fiber boards after punching, and placing each layer of bamboo fiber boards in the anti-corrosion SBS modified emulsified asphalt for soaking for 30-50 minutes before the bamboo fiber boards are installed, wherein the bamboo fiber boards can be installed after the soaking is completed; then setting corresponding mark positions and a stepped bamboo fiber board structure, installing the bamboo fiber board on a waterproof layer 2 at the expansion joint position step by step in a layered manner, and simultaneously pouring the stress release layers 33 at two sides of the bamboo fiber board when each layer is installed, namely adopting high-elasticity high-viscosity expansion joint pouring glue to sequentially pour glue along with the layer-by-layer installation of the bamboo fiber board until the bamboo fiber board at the top layer is completely installed, stopping pouring glue, finally adopting bolts to integrally fasten the expansion carrier layer 31, cutting off a screw rod higher than a fixed screw cap part, and spot welding screw caps so as to prevent detachment, wherein the stress release layers 33 at two sides are required to be fully poured;
5) Paving an adhesive layer 4: paving a high-elasticity high-viscosity modified hot asphalt layer on the surface of the telescopic layer 3 to form the telescopic layer 3, wherein the thickness of the telescopic layer is 1-2 mm;
6) Paving an asphalt pavement layer 5 and a wearing surface layer 6 and arranging a stress release strip layer 61: paving asphalt mixture uniformly mixed on site on the surface of an adhesive layer 4 by adopting a CTEC-5 cold mixing and cold paving process, compacting to form an asphalt paving layer 5 and a wearing surface layer 6, wherein the asphalt paving layer 5 and the wearing surface layer 6 are the same in material process but different in thickness, the wearing surface layer is arranged on the top surface to exert wearing effect, the paved asphalt mixture is leveled with bridge deck traffic lanes on two sides, the surface of the wearing surface layer is reserved with a notch with the width of 1-2 cm, pouring sealant special for expansion joints on the notch to form a stress release strip layer 61, and finally, leveling the top surface;
7) After construction and installation are completed, traffic is opened after maintenance is carried out for 0.5-1 hour.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, and those skilled in the art may make various changes and modifications within the scope of the technical solution of the present invention, and any modifications, equivalent changes and modifications made to the above embodiments according to the technical matters of the present invention are still within the scope of the technical solution of the present invention.
Claims (7)
1. The steel-free seamless bridge expansion joint device is arranged between two beam ends and is characterized by mainly comprising a leveling layer, a waterproof layer, a telescopic layer, an adhesive layer, an asphalt paving layer and a wearing surface layer which are arranged from bottom to top based on the bottom surface of the telescopic position of a beam body, wherein the leveling layer is a high-strength mortar layer arranged at the bottom to bear the upper part, and the leveling layer is paved on the two beam ends at two sides of the expansion joint; the waterproof layer is an asphalt waterproof protection sliding layer and is paved on the surfaces of the two leveling layers; the telescopic layer is of a composite layer structure and comprises a telescopic carrier layer and stress release layers at two sides; the adhesive layer, the asphalt pavement layer and the wearing surface layer are sequentially paved on the telescopic layer, and the wearing layer also comprises a stress release strip layer with the same thickness as the adhesive layer;
the waterproof layer is of a three-layer composite structure and sequentially comprises a high-elasticity high-viscosity SBS modified emulsified asphalt layer, a bidirectional basalt fiber cloth layer, a high-elasticity high-viscosity SBS modified emulsified asphalt layer and a lubricating structure surface from top to bottom;
the telescopic carrier layer is formed by combining 4-8 bamboo fiber boards with the thickness of 1.5cm and stainless steel plates into a whole, one side of the whole is anchored on a beam body through bolts above one beam end to be an anchoring end, and the other side of the whole is placed above the waterproof layer of the other beam end to be a free sliding movable end; the size of the bolts at the anchoring end is brave 8-12 mm;
the movable end of the telescopic carrier layer is of an inverted ladder-shaped structure, and the length of each bamboo fiber board is gradually increased from bottom to top by 1-3 cm.
2. The steel-free seamless bridge expansion joint device according to claim 1, wherein the leveling layer is a high-strength mortar layer with strength of C30.
3. The steel-free seamless bridge expansion joint device according to claim 2, wherein the bottom bamboo fiber plate of the expansion carrier layer is clamped and fixed through a stainless steel plate, and the thickness of the stainless steel plate is 1-3 mm.
4. A steel-free seamless bridge expansion joint device according to claim 3, wherein the stress release layer is a high-elastic high-viscosity expansion joint filling adhesive layer filled on two sides of the expansion carrier layer.
5. The expansion joint device for the seamless bridge without steel according to claim 4, wherein the adhesive layer is a high-elasticity high-viscosity modified hot asphalt layer with the thickness of 1-2 mm, and the thickness of the asphalt pavement layer and the abrasion surface layer is 3-5 cm.
6. The seamless bridge expansion joint device according to claim 5, wherein the stress release strip layer of the wearing layer is arranged above the corresponding movable end, the width is 1-2 cm, and the thickness is the same as the thickness of the wearing layer.
7. The construction process of the steel-free seamless bridge expansion joint device is characterized by mainly comprising the following steps of:
1) Cleaning the expansion joint position: the space from the reserved bottom surface of the expansion joint to the above is entirely chiseled, the bottom surface is chiseled as much as possible during cleaning, and floating dust on the surface is blown clean by a high-pressure fan;
2) Laying a leveling layer: firstly, pre-burying an anchor bolt at one side of a fixed end before pouring a leveling layer; wetting the paved contact surface by adopting water, and controlling the surface to be free of any clear water; then paving the bottom surface of the expansion joint by adopting quick high-strength cement mortar with C30 strength to form a leveling layer of the high-strength mortar, wherein the paving thickness is 1-5cm, and the surfaces of the leveling layers on two sides are controlled to keep the same horizontal position in the paving process; finally, after the paving is finished, adopting cotton felt or cotton cloth to spray water and preserve for 1.5-2 hours so as to form the strength of C30 in 2 hours;
3) Laying a waterproof layer: after the leveling layer is maintained, brushing a high-elasticity high-viscosity SBS modified emulsified asphalt layer with the thickness of 0.5-1 mm on the surface of the leveling layer, and then sequentially paving a bidirectional basalt fiber cloth layer and the high-elasticity high-viscosity SBS modified emulsified asphalt layer upwards;
4) Paving a telescopic carrier layer and arranging a stress release layer: firstly, manufacturing bamboo fiber plates and stainless steel plates of all layers according to the size of an expansion joint, assembling the bamboo fiber plates and the stainless steel plates layer by layer into a whole in advance, punching holes according to the positions of pre-embedded anchor bolts, then mounting a telescopic carrier layer on a waterproof layer, arranging stress release layers on two sides, pouring the stress release layers in a high-elasticity high-viscosity expansion joint pouring glue pouring mode, and finally fastening and anchoring the telescopic carrier layer by bolts;
5) Paving an adhesive layer: paving a layer of high-elasticity high-viscosity modified hot asphalt layer on the surface of the telescopic layer to form the telescopic layer, wherein the thickness of the telescopic layer is 1-2 mm;
6) Paving an asphalt pavement layer and a wearing surface layer, and arranging a stress release strip layer: paving asphalt mixture uniformly mixed on site on the surface of an adhesive layer by adopting a CTEC-5 cold mixing and paving process, compacting to form an asphalt paving layer and a wearing surface layer, paving, leveling with bridge deck traffic lanes on two sides, reserving a notch with the width of 1-2 cm on the surface of the wearing layer, pouring sealant special for expansion joints on the notch to form a stress release strip layer, and finally pouring a flat top surface;
7) After construction and installation are completed, traffic is opened after maintenance is carried out for 0.5-1 hour.
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| CN201910451034.5A CN110029576B (en) | 2019-05-28 | 2019-05-28 | Steel-free seamless bridge expansion joint device and construction process thereof |
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| CN201910451034.5A CN110029576B (en) | 2019-05-28 | 2019-05-28 | Steel-free seamless bridge expansion joint device and construction process thereof |
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| CN110029576B true CN110029576B (en) | 2023-11-28 |
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| CN110792035B (en) * | 2019-11-13 | 2021-05-25 | 成都市新筑路桥机械股份有限公司 | Reinforced seamless elastomer expansion device and construction method thereof |
| CN111155424A (en) * | 2020-01-10 | 2020-05-15 | 南通大学 | Concrete bridge deck assembled telescopic device and manufacturing method thereof |
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