CN108301546B - A prefabricated large modular composite beam-slab structure with temporary support of plane trusses - Google Patents

Abstract

The invention discloses an assembled large-module superposed beam plate structure with a plane truss temporary support. After the beam and the connecting plate are welded, the beam and the connecting plate are connected with the truss through bolts to form a temporary whole. And laying a reinforcing mesh on the beam slab, extending the reinforcing mesh to be welded with the beam flange, and pouring a concrete slab layer to form the assembled large module beam slab structure. And after the steel bars are hoisted in place on site, laying upper-layer steel bars and pouring residual concrete. The invention adopts the assembled large module composite floor slab with temporary support, thus solving the problem of floor slab integrity; the beam-slab connection problem is solved by integrating the large module beam-slab structure into a beam-slab structure; the reinforcing mesh is simple and convenient to manufacture, and the later-stage pipeline arrangement is facilitated; the hoisting weight is reduced, and the assembly precision and the construction efficiency are improved.

Description

A prefabricated large modular composite beam-slab structure with temporary support of plane trusses

technical field

The invention relates to an assembled large-module superimposed beam-slab structure with a plane truss temporary support, belonging to the technical field of structural engineering.

Background technique

The prefabricated building is the key development object of my country's construction industry for a period of time in the future, and the innovation of the industrialized prefabricated structure system is imperative. Prefabricated structural system refers to a building produced by making housing units or components according to unified and standard building parts specifications, and then transporting them to the construction site for assembly. A large number of construction parts are produced and processed in the workshop, a large number of on-site assembly operations, the standardization of design and the informatization of management meet the requirements of green buildings. It is characterized by light construction quality, energy saving and environmental protection, fast construction speed, and high degree of industrialization. It can solve many problems such as low level of construction industrialization in my country, low labor productivity of housing construction and low quality of traditional housing products, and adapt to the development of my country's construction industry.

The floor slab is one of the basic components in the whole building. The prefabricated floor slab structure is adopted, and the standardized floor slabs are prefabricated in the factory. On-site hoisting and splicing can reduce the workload of on-site wet work and greatly shorten the construction period. However, the existing prefabricated composite floor slabs often have the following problems: a single slab is prefabricated, and the floor slab assembled on site is mainly stressed by one-way slabs, the prefabricated slabs are not connected to each other, and the integrity cannot be guaranteed; The beams are separated, and there are problems in the connection of beams and plates; the precast concrete layer is thicker, which increases the weight of hoisting and increases the difficulty. On the other hand, the prefabricated laminated floor using steel trusses has the problems of complicated production of steel trusses, lap connection with other steel bars to increase the amount of steel bars, and occupying a large space, which is not conducive to the layout of pipelines.

SUMMARY OF THE INVENTION

The invention proposes a prefabricated large-module superimposed beam-slab structure with temporary support of a plane truss, the purpose of which is to overcome the defects of the existing prefabricated floor structure, and realize factory-like production in the production and construction process of the prefabricated floor. Quick assembly on site, solve the integrality problem of prefabricated floor splicing through superposition, and improve the reliability of the structure. At the same time, the beam-slab structure of the large module is integrated with the beam and the plate, which solves the connection problem of the beam and the plate. The steel mesh is used as the reinforcing bar of the prefabricated plate, which is simple and convenient to manufacture, and is conducive to the layout of the pipeline in the later stage. At the same time, the hoisting weight is reduced, the construction difficulty is reduced, and the construction efficiency is improved.

The technical scheme of the present invention is as follows: a prefabricated large modular composite beam-slab structure with a plane truss temporary support, the structure includes a beam, a temporary support (4), a beam connecting plate (5), a steel mesh and a precast concrete layer ( 6).

The beam comprises a transverse side span I-shaped section beam (1), a mid-span channel steel beam (2) and a longitudinal I-shaped section beam (3). The transverse side span I-shaped section beams (1) and the mid-span channel steel beams (2) are arranged in parallel, and the longitudinal I-shaped section beams (3) are placed vertically on the transverse side span I-shaped section beams (1) and the mid-span channel steel beams ( 2) between the two sides of the beam end; the upper and lower ends of each beam connecting plate (5) are respectively welded on the transverse side span I-shaped section beam (1) and the mid-span channel steel beam (2).

The temporary support (4) is supported by a plane truss, which can meet the bearing capacity requirement in the construction stage. The temporary support (4) is placed along the direction perpendicular to the transverse side span I-shaped section beam (1) and the mid-span channel steel beam (2). Support connection plates (11) are welded at both ends of the plane truss support, and the temporary support (4) is connected to the beam through the beam connection plate (5).

The beam connecting plate (5) is a connecting plate with holes; the beam connecting plate (5) is connected to the beam by welding, the supporting connecting plate (11) is provided with connecting holes, and the connecting holes on the supporting connecting plate (11) are connected during assembly. Align with the holes in the beam connection plate (5) and fasten with the bolts (9) and hex nuts (10).

The precast concrete layer (6) is produced after the connection of the temporary support (4) and the beam is completed.

The thickness of the prefabricated concrete layer (6) is 4-5cm, and the prefabricated concrete layer (6) is poured on the temporary support (4), so that the prefabricated concrete layer (6) after pouring is flush with the upper flange surface of the beam .

The reinforcing mesh is arranged in the precast concrete layer (6). Concrete is poured after the steel mesh is laid, and concrete is also poured on the inner side of the flange of the beam during pouring, so that the precast concrete layer (6) and the beam form a whole. The reinforcement mesh includes longitudinal reinforcement (7) and transverse reinforcement (8). The longitudinal reinforcement (7) is placed under the transverse reinforcement (8), the longitudinal reinforcement (7) and the transverse reinforcement (8) are arranged vertically, and the longitudinal reinforcement (7) penetrates into the transverse side span I-shaped section beam (1) and the mid-span channel steel beam (2) to the edge of the web. The transverse reinforcement bars (8) penetrate deep into the longitudinal I-shaped section beams (3) to the edge of the web; and the transverse reinforcement bars (8) are welded together with the lower sides of the upper flanges of the longitudinal I-shaped section beams (3).

The concrete pouring structure at the beam connecting plate (5) is as follows: the concrete is poured between the web of the beam and the beam connecting plate (5), and the rest of the beam is poured along the web to the outermost side of the flange. Before pouring, insert a sponge seal between the hexagonal nut (10) of the beam connecting plate (5) and the gap of the bolt hole.

The prefabricated large modular composite beam-slab structure with truss temporary support is prefabricated in the factory and transported to the site for hoisting in place. Above the prefabricated concrete layer (6), the upper floor steel mesh is laid according to the design and the remaining floor concrete is poured to form a stack. Combined floor. After the maintenance of the floor slab is completed, the bolts (9) are removed, and the temporary support (4) is removed to complete the construction of the prefabricated laminated floor slab.

The beam and the temporary support (4) are welded and bolted by the connectors and the prefabrication of the concrete laminate is completed in the factory. The large modular beam plate is hoisted in place at the construction site, and then the remaining floor concrete can be poured.

The present invention has the following beneficial effects:

The prefabricated large modular beam-slab structure is adopted, which is produced in the factory ahead of time, reducing the number of assembled parts in the on-site construction, solving the problem of the integrity of the prefabricated floor, and improving the structural safety. In the form of superimposed floor slabs, prefabricated floor slabs are used, and the rest of the floor slabs are poured after the overall hoisting is in place, which can reduce the hoisting weight, reduce the difficulty of hoisting, and improve the assembly accuracy. Since there is a precast concrete layer as the bottom plate, the formwork work can be greatly reduced when the floor slab is poured on site, the work efficiency is improved, and the construction progress is accelerated.

Description of drawings

FIG. 1 is a plan view of the prefabricated laminated floor slab of the present invention.

FIG. 2 is an exploded schematic diagram of the panel A unit of the prefabricated laminated floor slab of the present invention.

3 is a schematic structural diagram of the plane truss and the supporting end connecting plate of the present invention.

4 is a schematic diagram of the connection structure between the beam connecting plate and the beam of the present invention.

5 is a schematic cross-sectional view of the connection between the beam and the truss of the present invention.

FIG. 6 is an assembly schematic diagram of the assembled composite beam-slab structure system with temporary support of the present invention.

In the figure: A, side span plate element, B, middle span plate element, 1, transverse side span I-shaped section beam, 2, middle span channel steel beam, 3, longitudinal I-shaped section beam, 4, temporary support, 5, Beam connection plate, 6. Precast concrete layer, 7. Longitudinal reinforcement, 8. Transverse reinforcement, 9. Bolt, 10. Hex nut, 11. Support connection plate.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in Fig. 1, the assembled large modular composite beam-slab structure with temporary support of plane truss is composed of temporary truss support, profiled steel beams, laminated floor, steel mesh, and connecting plate; The basic components of the assembled large-module superimposed beam plate temporarily supported by the truss include the side span plate unit A and the mid-span plate unit B; the side spans at both ends of the assembled large-module laminated beam plate temporarily supported by the plane truss It is the side span plate unit A, the second span connected with the side span plate unit A adopts the middle span plate unit B, and the other units in the middle span adopt the middle span plate unit B and are spliced with each other.

All the longitudinal beams of the assembled composite beam-slab structure adopt I-shaped section beams (3). One side of the end of the middle beam plate of the side span plate unit A is a transverse side span I-shaped section beam (1), and the transverse beam connected with the middle span plate unit B is a middle span channel steel beam (2). The transverse beams on both sides of the mid-span plate unit B are both mid-span channel steel beams (2).

The structures of side span plate unit A and mid-span plate unit B differ only in the cross-sectional form of the transverse beams, and the remaining temporary supports (4), beam connecting plates (5), precast concrete layers (6), longitudinal steel bars (7), transverse Reinforcing bars (8) and other forms are the same.

The specific structural measures of the prefabricated composite beam-slab structure are described in detail below by taking the side span plate unit A as an example.

As shown in Figure 2, the fabricated beam-slab structure mainly includes a transverse side span I-shaped section beam (1), a mid-span channel steel beam (2), a longitudinal I-shaped section beam (3), and a temporary support (4) , a beam connecting plate (5), a precast concrete layer (6), a longitudinal reinforcing bar (7), a transverse reinforcing bar (8), and a supporting connecting plate (11).

As shown in Figures 2 and 3, the temporary support (4) is supported by a plane truss, and is placed at a certain distance perpendicular to the direction of the transverse side span I-shaped section beam (1) and the mid-span channel steel beam (2). As shown in the figure, the support connecting plates (11) with holes are welded on the outside of the upper and lower chords at both ends of the plane truss. The temporary support (4) is connected with the beam connecting plate (5) through the support connecting plate (11).

As shown in Figure 4, the upper and lower sides of the beam connecting plate (5) are respectively welded to the inner sides of the upper and lower flanges of the transverse side span I-shaped section beam (1) and the mid-span channel steel beam (2).

As shown in Figure 5, the beam connecting plate (5) and the supporting connecting plate (11) are connected with bolts (9) and hexagonal nuts (10). The hexagonal nut (10) is placed on one side of the beam connecting plate (5), and the gap between the nut and the hole is sealed with foam glue, so as to facilitate disassembly after on-site hoisting and construction.

As shown in Figures 1, 2, and 5, after the connection between the temporary support and the beam is completed, steel mesh is laid and concrete is poured. The precast concrete layer (6) is a 4-5cm reinforced concrete layer, which is poured on the temporary support, so that the poured concrete layer is flush with the surface of the upper flange of the beam, which is convenient for later work such as hoisting. Specifically, it includes: taking the reinforcing mesh of the lower layer of the reinforced concrete beam and slab during the design as the reinforcing mesh of the precast concrete layer (6). Including longitudinal reinforcement (7), transverse reinforcement (8). After the temporary support is erected, longitudinal reinforcement bars (7) and transverse reinforcement bars (8) are laid thereon. Longitudinal reinforcement (7) is placed at the bottom, and the reinforcement is inserted deep into the transverse steel beam flange down to the edge of the web. Place the transverse reinforcement (8) on (7), and also insert the transverse reinforcement (8) into the longitudinal I-section beam (3) flange down to the edge of the web; connect the transverse reinforcement (8) with the longitudinal beam (3) The undersides of the upper flanges are welded together.

After the laying is completed, the concrete layer can be poured. When the layer is poured, concrete is also poured on the inner side of the beam flange to form a whole with the slab. Before pouring, insert a sponge seal between the hexagonal nut (10) on the left side of the beam connecting plate (5) and the bolt (9). The concrete pouring structure at the beam connecting plate (5) is as follows: the part between the beam web and the beam connecting plate (5) is poured. The rest of the beam is cast along the web to the outermost edge of the flange.

As shown in FIG. 6 , the laminated beam-slab structure shown in the figure is obtained after assembly.

The prefabricated large modular composite beam-slab structure with truss temporary support is prefabricated in the factory and transported to the site for hoisting in place, and the upper reinforcement mesh is laid on the prefabricated concrete layer (6) according to the design and the remaining floor concrete is poured to form a superposition floor. After the floor slab maintenance is completed, remove the bolts (9) and remove the temporary support (4). The prefabricated laminated floor construction can be completed.

The above is a specific embodiment of the present invention, and the implementation of the present invention is not limited thereto.

Claims (1)

1. an assembled large module superimposed beam-slab structure with plane truss temporary support, it is characterized in that: this assembled large module superimposed beam-slab structure with plane truss temporary support comprises beams, temporary supports (4), beams connecting plate (5), reinforcement mesh and precast concrete layer (6); The basic components of the assembled large-module superimposed beam-slab structure with the temporary support of the plane truss include a side span plate unit A and a mid-span plate unit B; The side spans at both ends of the structure are side-span plate unit A, the second span connected with side-span plate unit A adopts mid-span plate unit B, and the other units in the middle of the span adopt mid-span plate unit B and are spliced with each other; The beam comprises a transverse side span I-shaped section beam (1), a mid-span channel steel beam (2) and a longitudinal I-shaped section beam (3); the transverse side span I-shaped section beam (1) and the middle-span channel steel beam ( 2) Parallel arrangement, the longitudinal I-shaped section beams (3) are vertically placed on both sides of the beam end between the transverse side span I-shaped section beams (1) and the mid-span channel steel beams (2); each beam connecting plate (5) ) are welded to the transverse side span I-section beam (1) and the mid-span channel steel beam (2) respectively; The temporary support (4) is supported by a plane truss, which can meet the bearing capacity requirements in the construction stage; the temporary support (4) is placed along the direction perpendicular to the transverse side span I-shaped section beam (1) and the mid-span channel steel beam (2); Welding support connection plates (11) at both ends of the plane truss support, and the temporary support (4) is connected to the beam through the beam connection plate (5); The beam connecting plate (5) is a connecting plate with holes; the beam connecting plate (5) is connected to the beam by welding, the supporting connecting plate (11) is provided with connecting holes, and the connecting holes on the supporting connecting plate (11) are connected during assembly. Align with the holes on the beam connecting plate (5) and fasten with bolts (9) and hex nuts (10); After the connection of the temporary support (4) and the beam is completed, the precast concrete layer (6) is made; The thickness of the prefabricated concrete layer (6) is 4-5cm, and the prefabricated concrete layer (6) is poured on the temporary support (4), so that the prefabricated concrete layer (6) after pouring is flush with the upper flange surface of the beam ; The reinforcement mesh is arranged in the precast concrete layer (6); the concrete is poured after the reinforcement mesh is laid, and the concrete is also poured on the inner side of the flange of the beam during pouring, so that the prefabricated concrete layer (6) and the beam are formed as a whole; the reinforcement mesh includes longitudinal reinforcement ( 7) and the transverse reinforcement (8); the longitudinal reinforcement (7) is placed under the transverse reinforcement (8), the longitudinal reinforcement (7) and the transverse reinforcement (8) are arranged vertically, and the longitudinal reinforcement (7) penetrates into the transverse side span I-shaped section At the web edge of the beam (1) and the mid-span channel beam (2); the transverse reinforcement (8) penetrates into the web edge of the longitudinal I-section beam (3); connect the transverse reinforcement (8) with the longitudinal reinforcement. The lower sides of the upper flanges of the cross-section beam (3) are welded together; the concrete pouring structure at the beam connecting plate (5) is as follows: the concrete is poured between the web of the beam and the beam connecting plate (5), and the The rest of the concrete is poured along the web to the outermost side of the flange; before pouring, a sponge seal is inserted between the hexagonal nut (10) of the beam connecting plate (5) and the bolt hole gap; The prefabricated large modular composite beam-slab structure with the temporary support of the plane trusses is prefabricated and transported to the site for hoisting in place, and the upper floor steel mesh is laid according to the design above the precast concrete layer (6) and the remaining floor concrete is poured to form a stack. After the maintenance of the floor is completed, the bolts (9) are removed, and the temporary support (4) is removed to complete the construction of the prefabricated laminated floor.

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