CN117107976A - Assembled fast-assembling support-free concrete superposed structure - Google Patents

Assembled fast-assembling support-free concrete superposed structure Download PDF

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Publication number
CN117107976A
CN117107976A CN202311316538.9A CN202311316538A CN117107976A CN 117107976 A CN117107976 A CN 117107976A CN 202311316538 A CN202311316538 A CN 202311316538A CN 117107976 A CN117107976 A CN 117107976A
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CN
China
Prior art keywords
prefabricated
support
limiting
free
bars
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311316538.9A
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Chinese (zh)
Inventor
张金丹
陈宜虎
张敏
孙凌云
蒋鸿民
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Hezhou University
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Hezhou University
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Publication date
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Priority to CN202311316538.9A priority Critical patent/CN117107976A/en
Publication of CN117107976A publication Critical patent/CN117107976A/en
Pending legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21—Connections specially adapted therefor
    • E04B1/215—Connections specially adapted therefor comprising metallic plates or parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/162—Connectors or means for connecting parts for reinforcements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
    • E04C5/18—Spacers of metal or substantially of metal

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

The invention relates to the field of buildings, in particular to an assembled fast-assembled support-free concrete superposition structure, which comprises a prefabricated main beam, a prefabricated secondary beam and a support-free connecting piece, wherein the support-free connecting piece comprises a limiting block, a limiting groove with an upward opening is formed in the limiting block, a limiting reinforcing steel bar is connected to the inner side wall of the limiting groove, and a notch with the upward opening is formed in the outer side wall of the limiting groove; the limiting steel bars of the support-free connecting pieces are buried in the prefabricated main beams and are connected with the transverse steel bars in the prefabricated main beams, and the inner side walls of the support-free connecting pieces are propped against the side walls of the prefabricated main beams; the second part of prefabricated secondary beam supports on the up end of stopper, and the connecting reinforcement that the third part of prefabricated secondary beam stretches out stretches into in spacing recess, and the tip of connecting reinforcement is equipped with the anchor assembly that prevents that the connecting reinforcement from deviating from in the spacing recess. The invention simplifies the node structure, reduces the overlap joint length of the reinforcing steel bars, avoids the collision of the reinforcing steel bars in the node area, is beneficial to the pouring of concrete in the node area, and can realize the support-free of the node.

Description

Assembled fast-assembling support-free concrete superposed structure
Technical Field
The invention relates to the field of buildings, in particular to an assembled superposed structure.
Background
The assembled concrete laminated structure has the advantages of quick construction, less site pollution and the like, and is popular in recent years.
However, the existing fabricated concrete composite structure has the following problems:
1. during construction, longitudinal steel bars of the beam are required to stretch into the columns to be anchored, because the space at the junction of the beams and the columns is smaller, the situation that the steel bars collide or the steel bars cannot be placed easily occurs during insertion, and concrete poured at the joints can be caused to be not compact easily at the later stage, so that the construction period can be influenced, and the connection strength of the beams and the columns can be influenced.
2. Corresponding supports are required to be arranged at the joints of the beam and column joints and the primary and secondary beams, so that a large amount of steel is consumed, a large amount of manpower is occupied, the work efficiency of other working surfaces is influenced by the supports, the progress of engineering is delayed, the construction period of a building is prolonged, and project cost is increased between intangibles.
Disclosure of Invention
The invention aims to provide an assembled quick-assembly support-free concrete superposed structure so as to solve the technical problems.
The technical problems solved by the invention can be realized by adopting the following technical scheme:
the assembled fast-assembled support-free concrete superposed structure comprises a prefabricated main beam and a prefabricated secondary beam, and is characterized by further comprising a support-free connecting piece, wherein the support-free connecting piece comprises a limiting block, a limiting groove with an upward opening is formed in the limiting block, a limiting reinforcing steel bar is connected to the inner side wall of the limiting groove, and a notch with an upward opening is formed in the outer side wall of the limiting groove;
the limiting steel bars of the support-free connecting pieces are buried in the prefabricated main beams and are connected with the transverse steel bars in the prefabricated main beams, and the inner side walls of the support-free connecting pieces are propped against the side walls of the prefabricated main beams;
the end face of the precast secondary beam extends downwards in the vertical direction to form a first part, extends inwards in the horizontal direction to form a second part, extends downwards in the vertical direction to form a third part, and is in a second-order step shape as a whole;
the second part of the prefabricated secondary beam is propped against the upper end face of the limiting block, the connecting steel bar extending out of the third part of the prefabricated secondary beam penetrates through the notch and then extends into the limiting groove, and an anchoring piece for preventing the connecting steel bar from falling out of the limiting groove is arranged at the end part of the connecting steel bar.
The prefabricated quick-assembly support-free concrete superposed structure further comprises a prefabricated column, wherein a support-free connecting piece is pre-arranged on the prefabricated column, a limit reinforcing steel bar of the support-free connecting piece is buried in the prefabricated column and is connected with a longitudinal reinforcing steel bar in the prefabricated column, and the inner side wall of a limit groove of the support-free connecting piece is propped against the side wall of the prefabricated column;
the lower part of the prefabricated girder is provided with a transverse steel bar extending out of the prefabricated girder, the transverse steel bar passes through the notch and then extends into the limiting groove, and the end part of the transverse steel bar is provided with an anchoring piece for preventing the transverse steel bar from falling out of the limiting groove.
The assembled fast-assembling support-free concrete composite structure further comprises a prefabricated composite slab, wherein the prefabricated girder is provided with girder angle steel extending along the prefabricated girder, the prefabricated secondary girder is provided with secondary girder angle steel extending along the prefabricated secondary girder, and the prefabricated composite slab is erected on the girder angle steel or the secondary girder angle steel.
The utility model discloses a prefabricated laminated slab, including girder angle steel, secondary beam angle steel, prefabricated laminated slab, prefabricated girder, can, the girder angle steel all be equipped with the skid on the secondary beam angle steel, the skid presss from both sides prefabricated laminated slab with between the prefabricated girder, perhaps, presss from both sides prefabricated laminated slab with between the prefabricated secondary beam.
The assembled fast-assembling support-free concrete superposed structure further comprises a cast-in-situ floor slab, wherein after the concrete is cast in situ above the prefabricated superposed slab, the cast-in-situ floor slab is obtained, and truss steel bars on the prefabricated superposed slab are buried in the cast-in-situ floor slab.
The assembled fast-assembling support-free concrete superposed structure further comprises a cast-in-situ connection node, wherein after high-strength mortar is poured into the support-free connection piece, the cast-in-situ connection node is obtained, and the support-free connection piece is buried in the cast-in-situ node.
And a through or non-through concave key groove is arranged on the side surface of the prefabricated main beam at the upper part of the support-free connecting piece at the cast-in-situ connecting node, and high-strength mortar is poured to strengthen the bonding between new and old concrete.
The beneficial effects are that:
1. the invention is additionally provided with the support-free connecting piece, and the prefabricated components are connected through the support-free connecting piece instead of being directly connected by the steel bars in a staggered way, so that the problems in the background technology can be effectively solved.
2. The invention simplifies the node structure, reduces the overlap joint length of the reinforcing steel bars, avoids the collision of the reinforcing steel bars in the node area, is beneficial to the pouring of concrete in the node area, and can realize the support-free of the node.
3. The structure of the invention can realize the continuity of the columns because the beam steel bars do not penetrate into the columns.
Drawings
FIG. 1 is a schematic illustration of a construction of a stay-free connector;
FIG. 2 is a schematic illustration of another construction of a stay-free connector;
FIG. 3 is a schematic view of the structure of angle steel and skid;
FIG. 4 is a schematic view of the connection structure of the prefabricated main beams and the prefabricated secondary beams;
FIG. 5 is a schematic view of the connection structure of the prefabricated column and the prefabricated main beam;
FIG. 6 is a schematic view of the structure of the precast secondary beam ends;
fig. 7 is a schematic view of a part of the structure of the present invention.
Detailed Description
In order that the manner in which the invention is practiced, as well as the features and objects and functions thereof, will be readily understood and appreciated, the invention will be further described in connection with the accompanying drawings.
Referring to fig. 1, 2, 3, 4, 5, 6 or 7, the fabricated fast-assembling support-free concrete composite structure mainly comprises prefabricated columns 10, prefabricated main beams 8, prefabricated secondary beams 9, prefabricated composite slabs, cast-in-situ floors and the like. Longitudinal steel bars are inserted into the prefabricated columns 10, transverse steel bars are inserted into the prefabricated main beams 8, connecting steel bars 12 are inserted into the prefabricated secondary beams 9, and truss steel bars are arranged on the prefabricated laminated plates.
With respect to the stay-free connectors 4
Example 1
The support-free connecting piece 4 comprises a limiting block 2, and a limiting groove with an upward opening is formed in the limiting block 2. The support-free connecting piece 4 consists of a limiting block 2 and a plurality of limiting reinforcing bars 1. The inner side wall of the limit groove is connected with a limit steel bar 1, and the outer side wall of the limit groove is provided with a notch 3 with an upward opening. The limiting steel bar 1 is U-shaped, and the end part of the limiting steel bar 1 is connected to the inner side wall of the limiting groove. The spacing steel bar 1 is longitudinally arranged, namely, two end parts of the spacing steel bar 1 are arranged up and down and on the same vertical surface. At this time, it is preferable that the spacing bars 1 are in one-to-one correspondence with the notches 3, that is, one notch 3 is aligned with both ends of one spacing bar 1. The limit bar is preferably welded with the limit block.
Example 2
The support-free connecting piece 4 consists of two limiting blocks 2 and an even number of limiting reinforcing steel bars 1. The spacing reinforcing bar 1 is the rod form, and the inside wall of two stopper 2 is connected respectively at the both ends of spacing reinforcing bar 1. The outer side walls of the two limit grooves are provided with notches 3 with upward openings, and the notches 3 are in one-to-one correspondence with the limit steel bars 1. The limit steel bars 1 are distributed in double rows at equal intervals. The bolt hole with the outward opening is formed in the inner side wall of the limiting block 2, and the limiting steel bar 1 is in threaded connection with the limiting block 2. Both ends of the limiting reinforcing steel bar 1 are provided with external threads, and the directions of the external threads are opposite. Therefore, when the limiting steel bar 1 is screwed, the limiting blocks 2 connected to the two ends of the limiting steel bar 1 can simultaneously inwards advance or simultaneously outwards retreat.
The use of the stay-free connectors of either embodiment 1 or embodiment 2 may be selected as desired. For example: example 2 was chosen when the first building element was provided with second building elements symmetrically on both sides. Example 1 was chosen when one side of the first building element was provided with a second building element and the other side was provided with a second building element. When the first building element is provided with the second building element on three or four sides, embodiment 1 and embodiment 2 are interlaced for use, where the interlacing is of spacing bars, preferably vertically. The distance between two sections of the U-shaped spacing steel bars and the distance between the two rows of spacing steel bars are preferably equal to or greater than the outer diameter of the spacing steel bars. The spacing steel bars are welded together after being staggered.
In the two embodiments, the outer side wall of the limiting groove is provided with the limiting hole 4, and the limiting hole 4 preferably penetrates through the side wall of each notch 3. Thereby further spacing the transverse reinforcement inserted therein using the spacing holes 4. The notch 3 plays a role in lifting the transverse steel bar, and when the concrete is cast in situ, the concrete can enter the lower part of the transverse steel bar, so that the cast in situ concrete is more uniformly filled. The distance from the lowest part of the notch 3 to the bottom of the limiting block 2 may be greater than the distance from the bottom of the limiting groove to the bottom of the limiting block 2. The end of the transverse steel bar is provided with an anchoring piece, and the anchoring piece can be a bending structure or a nut which is positioned in the limit groove. Thereby preventing the end portions of the lateral reinforcing bars from coming out.
In the two embodiments, a partition plate may be further disposed in the limiting groove, so that the structural strength of the support-free connecting piece 4 is increased by using the partition plate. Preferably, a partition plate is arranged between two adjacent notches 3, and the top of the partition plate is not higher than the notch of the limit groove. One end of the limiting partition plate is connected to the inner side wall of the limiting groove, and the other end of the limiting partition plate is connected to the outer side wall of the limiting groove. The bottom of the baffle can be connected to the bottom of the limit groove, but preferably, a gap exists between the bottom of the baffle and the bottom of the limit groove, so that when concrete is cast in situ, the concrete flows into the gap, and a firmer connecting structure is formed. Preferably, the limiting baffle and the limiting block 2 are integrally formed. The thickness of the separator may be gradually reduced from top to bottom. Therefore, a concrete structure with a large upper part and a small lower part can be formed between the partition boards, so that the concrete structure is prevented from falling off, and the connection firmness is improved.
In the two embodiments, the two ends of the limiting groove are preferably provided with end plates, so that the end parts of the limiting groove are sealed. The end plate and the limiting block 2 are preferably integrally formed. One side of the end plate, which is close to the partition plate, is used as an inner surface, and one side of the end plate, which is far away from the partition plate, is used as an outer surface, and an inserting structure is arranged on the outer surface of the end plate. So that at least two of the stay-free connectors 4 can be plugged together for use, thereby allowing the number of stay-free connectors 4 to be selected appropriately according to the width of the pre-fabricated column 10. The grafting structure is bar recess and the bar protruding with bar recess is supporting, and bar recess is located on the surface of one of them end plate of stopper 2, and bar protruding is located on the surface of another end plate of stopper 2, and bar recess and the bellied position of bar are just right.
With respect to the connection of the prefabricated main beams to the prefabricated secondary beams
The prefabricated secondary beam 9 and the prefabricated main beam 8 are connected by adopting a support-free connecting piece 4. The limiting steel bars 1 are sleeved on the transverse steel bars of the prefabricated main beams 8, the limiting blocks 2 are leaked outside the prefabricated main beams 8, and the connecting steel bars 12 of the prefabricated secondary beams 9 are inserted into the limiting grooves. At this time, the stay-free connecting piece 4 is required to be pre-buried in the prefabricated main beam 8.
Preferably, the end surface of the precast secondary beam extends downward in the vertical direction to form a first portion 13, extends inward in the horizontal direction to form a second portion, and extends downward in the vertical direction to form a third portion 14, so that the whole is in a second-order step shape. The limiting steel bars of the support-free connecting piece are buried in the prefabricated girder and are connected with the transverse steel bars in the prefabricated girder, and the inner side walls of the support-free connecting piece are propped against the side walls of the prefabricated girder. The second part in the prefabricated secondary beam is propped against the upper end face of the limiting block, after the connecting steel bar 12 extending out of the third part of the prefabricated secondary beam passes through the notch, the connecting steel bar 12 extends into the limiting groove, and the end part of the connecting steel bar 12 is provided with an anchoring piece 11 for preventing the connecting steel bar from falling out of the limiting groove.
The upper part of the side surface support-free connecting piece of the prefabricated main beam 8 is also provided with a through or non-through concave key slot 7, and high-strength mortar is poured into the later formwork to form a cast-in-situ connecting node. The concave key groove 7 is preferably in a C shape, so that the notch of the concave key groove 7 faces outwards and leaks outwards, and at least one transverse reinforcing steel bar of the prefabricated girder passes through the inside of the concave key groove 7; the concave key groove 7 is positioned above the support-free connecting piece 4. It is possible that the connection bars in the first portion of the pre-fabricated secondary beam do not protrude outside the pre-fabricated secondary beam. It is also possible that the connection bars in the first part of the prefabricated secondary beam extend outside the prefabricated secondary beam but not into the prefabricated main beam.
The advantages are that: the method has the advantages that the reserved gaps are avoided at the connecting parts of the main beam and the secondary beam, the section of the main beam is prevented from being weakened, the hoisting and the transportation are convenient, the secondary beam steel bars are lapped on the outer side of the main beam, a good plastic hinge area is easy to form, and the anti-seismic requirements of strong joints and weak components are met.
Connection relation between prefabricated column and prefabricated main beam
The prefabricated column and the prefabricated main beam can be connected by adopting a support-free connecting piece 4. The prefabricated column is provided with a support-free connecting piece in advance, and a limit reinforcing steel bar of the support-free connecting piece is buried in the prefabricated column and is connected with a longitudinal reinforcing steel bar in the prefabricated column, and the inner side wall of a limit groove of the support-free connecting piece is propped against the side wall of the prefabricated main beam. The lower part of the prefabricated girder is provided with a transverse steel bar extending out of the prefabricated girder, the transverse steel bar penetrates through the notch and then extends into the limiting groove, and the end part of the transverse steel bar is provided with an anchoring piece for preventing the transverse steel bar from falling out of the limiting groove.
The stay-free connectors 4 are preferably secured to the longitudinal bars within the precast column 10 by strapping, welding, or the like. At least two longitudinal bars in the prefabricated column 10 pass through the gap between the two connected limit bars 1.
The advantages are that: 1. the invention is additionally provided with the support-free connecting piece 4, and the prefabricated column 10 and the prefabricated main beam 8 are connected through the support-free connecting piece 4 instead of being directly connected by steel bars in a staggered way like the prior art, so that the problems in the prior art can be effectively solved. 2. The node structure is simplified, the overlap joint length of the steel bars is reduced, the steel bars in the node area are prevented from collision, the casting of concrete in the node area is facilitated, and meanwhile the node is free from supporting. 3. The beam steel bars do not penetrate into the columns, so that the columns can be continuous.
The prefabricated main beam is large in weighing, transverse reinforcing steel bars in the prefabricated main beam can be arranged in a layered and staggered mode in order to ensure the connection strength between the prefabricated column and the prefabricated main beam, and the number of the support-free connecting pieces on the prefabricated column is equal to the number of layers of the transverse reinforcing steel bars in the prefabricated main beam; gaps of the support-free connecting pieces on the prefabricated columns correspond to transverse reinforcing steel bars in the prefabricated main beams one by one. Thereby forming more connection points between the prefabricated columns and the prefabricated main beams. In addition, the bottom of the limit groove is provided with an opening which penetrates up and down. The opening at the bottom of the limit groove plays a role in enabling cast-in-place concrete to smoothly flow down to the support-free connecting piece 4 at the lowest part.
Connection relation between prefabricated laminated slab and prefabricated main beam and prefabricated secondary beam
The assembled fast-assembling support-free concrete composite structure further comprises a prefabricated composite slab, wherein angle steel 6 extending along the prefabricated main beam 8 is arranged on the prefabricated main beam 8, angle steel 6 extending along the prefabricated secondary beam 9 is arranged on the prefabricated secondary beam 9, and the prefabricated composite slab is erected on the angle steel 6. The thickness of the prefabricated laminated slab is preferably 30mm + -5 mm. Thereby reducing the weight of the prefabricated laminated slab and improving the single-vehicle transportation capacity of the transport vehicle. Truss steel bars are arranged on the prefabricated laminated plates, so that rigidity of the bottom plate is improved by the truss steel bars. The reinforcing steel bars of the prefabricated laminated plates are positioned in the prefabricated laminated plates, namely, the plate sides of the prefabricated laminated plates are free from producing the reinforcing steel bars, so that the reinforcing steel bars are prevented from collision, and the production construction efficiency and the template reuse rate are improved. The angle steel 6 preferably comprises a transverse plate positioned in the horizontal direction and a longitudinal plate positioned in the vertical direction, and the top end of the longitudinal plate is connected with one side end of the transverse plate. The longitudinal plates are abutted against the prefabricated main beams 8 or the prefabricated secondary beams 9. The positioning bolts are inserted into the prefabricated main beams 8 or the prefabricated secondary beams 9 after passing through the holes on the longitudinal plates. The positioning bolts are positioned to prevent the positioning bolts from falling out, can be in a U shape, are pre-embedded on the prefabricated main beams 8 or the prefabricated secondary beams 9 in advance, and at least one embedded bar in the prefabricated main beams 8 or the prefabricated secondary beams 9 passes through the positioning bolts. The positioning bolt is provided with a positioning nut which is propped against the lower end face of the transverse plate. The skid 5 extending along the transverse plate is arranged above the transverse plate, and the skid 5 is clamped between the prefabricated laminated slab and the beam and used for limiting the left and right positions of the prefabricated laminated slab. In order to prevent the skid 5 from being displaced during the installation process, the upper surface of the transverse plate is provided with a limit post extending upwards, which is inserted into the skid 5. The side of the skid remote from the beam may be an inclined surface so as to guide the pre-fabricated laminated slab into. The distance from the inclined surface to the beam preferably increases gradually from top to bottom.
The top of prefabricated superimposed sheet can cast in situ concrete, obtains cast-in-situ floor, and the truss reinforcing bar that leaks outside prefabricated superimposed sheet on the prefabricated superimposed sheet is all buried in the cast-in-situ floor. After the cast-in-situ floor is solidified, the angle steel and the skid can be removed. The width of the skid can be gradually increased from top to bottom, when the prefabricated laminated slab is a laminated slab with the end part of the steel bar, the skid not only can prevent the end part of the steel bar from being knocked or hung on other steel bars, but also can drive the extending steel bars to bend upwards, so that the skid bends to the upper cast-in-situ floor slab, and after the skid bends upwards and is connected to the steel bars in the cast-in-situ floor slab, the cast-in-situ floor slab and the prefabricated laminated slab can have higher connection strength. Can be equipped with the wire net, the wire net includes the first part that the horizontal direction extends, and first part presss from both sides between timber skid and angle steel, and the wire net still includes the second part that vertical direction extends, and the second part presss from both sides between timber skid and prefabricated superimposed sheet. After the angle steel and the skid are removed, the movement of the cast-in-place concrete in the space between the prefabricated laminated slab and the beam is limited by the steel wire mesh, so that the location of the skid is filled by the cast-in-place concrete.
The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. The assembled fast-assembled support-free concrete superposed structure comprises a prefabricated main beam and a prefabricated secondary beam, and is characterized by further comprising a support-free connecting piece, wherein the support-free connecting piece comprises a limiting block, a limiting groove with an upward opening is formed in the limiting block, a limiting reinforcing steel bar is connected to the inner side wall of the limiting groove, and a notch with an upward opening is formed in the outer side wall of the limiting groove;
the limiting steel bars of the support-free connecting pieces are buried in the prefabricated main beams and are connected with the transverse steel bars in the prefabricated main beams, and the inner side walls of the support-free connecting pieces are propped against the side walls of the prefabricated main beams;
the end face of the precast secondary beam extends downwards in the vertical direction to form a first part, extends inwards in the horizontal direction to form a second part, extends downwards in the vertical direction to form a third part, and is in a second-order step shape as a whole;
the second part in the prefabricated secondary beam is propped against the upper end face of the limiting block, the connecting steel bars extending out of the third part of the prefabricated secondary beam penetrate through the notch and then extend into the limiting groove, and anchoring parts for preventing the connecting steel bars from falling out of the limiting groove are arranged at the end parts of the connecting steel bars.
2. The assembled quick assembly type support-free concrete superposition structure according to claim 1, further comprising cast-in-situ connection nodes, wherein after high-strength mortar is poured into a formwork at the support-free connection parts, cast-in-situ connection nodes are obtained, and the support-free connection parts are buried in the cast-in-situ nodes;
and a through or non-through concave key groove is arranged on the side surface of the prefabricated girder at the upper part of the support-free connecting piece at the cast-in-situ connecting node.
3. The assembled quick assembly type support-free concrete superposed structure according to claim 1, further comprising a prefabricated column, wherein a support-free connecting piece is pre-arranged on the prefabricated column, a limit reinforcing steel bar of the support-free connecting piece is buried in the prefabricated column and is connected with a longitudinal reinforcing steel bar in the prefabricated column, and the inner side wall of a limit groove of the support-free connecting piece is propped against the side wall of the prefabricated main beam;
the lower part of the prefabricated girder is provided with a transverse steel bar extending out of the prefabricated girder, the transverse steel bar passes through the notch and then extends into the limiting groove, and the end part of the transverse steel bar is provided with an anchoring piece for preventing the transverse steel bar from falling out of the limiting groove.
4. The assembled quick assembly type support-free concrete superposed structure according to claim 3, wherein transverse steel bars in the prefabricated main beams are arranged in a layered and staggered mode, and the number of support-free connecting pieces on the prefabricated columns is equal to the number of layers of the transverse steel bars in the prefabricated main beams;
gaps of the support-free connecting pieces on the prefabricated columns correspond to transverse reinforcing steel bars in the prefabricated main beams one by one.
5. The assembled quick assembly stay-free concrete composite structure of any one of claims 1-4, further comprising a prefabricated composite slab, wherein the prefabricated girder is provided with girder angle steel extending along the prefabricated girder, the prefabricated secondary girder is provided with secondary girder angle steel extending along the prefabricated secondary girder, and the prefabricated composite slab is erected on the girder angle steel or the secondary girder angle steel.
6. The assembled quick assembly stay-free concrete composite structure of claim 5, wherein the girder angle steel and the secondary girder angle steel are respectively provided with a skid, and the skid is clamped between the prefabricated laminated slab and the prefabricated girder or between the prefabricated laminated slab and the prefabricated secondary girder.
7. The assembled quick assembly shouldering-free concrete composite structure of claim 5, further comprising a cast-in-place floor slab, wherein after the concrete is cast in place above the prefabricated composite slab, the cast-in-place floor slab is obtained, and truss steel bars on the prefabricated composite slab are buried in the cast-in-place floor slab.
8. The assembled quick-assembled support-free concrete composite structure according to any one of claims 1 to 4, wherein the limiting block comprises a plurality of limiting bars, the limiting bars are in a U shape, and two end parts of the limiting bars are arranged up and down and connected to the inner side walls of the limiting grooves.
9. The assembled quick-assembled support-free concrete composite structure according to any one of claims 1 to 4, wherein two limiting bars are arranged, an even number of limiting bars are arranged, the limiting bars are in a rod shape, the limiting bars are arranged in groups at equal intervals, and two ends of the limiting bars are respectively connected with inner side walls of the two limiting blocks.
CN202311316538.9A 2023-10-12 2023-10-12 Assembled fast-assembling support-free concrete superposed structure Pending CN117107976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311316538.9A CN117107976A (en) 2023-10-12 2023-10-12 Assembled fast-assembling support-free concrete superposed structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311316538.9A CN117107976A (en) 2023-10-12 2023-10-12 Assembled fast-assembling support-free concrete superposed structure

Publications (1)

Publication Number Publication Date
CN117107976A true CN117107976A (en) 2023-11-24

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Inventor after: Lv Haibo

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