Full-assembly type floor and beam mounting structure

Abstract

The utility model relates to the technical field of fabricated buildings, and discloses a fully fabricated floor and beam mounting structure which comprises a precast beam and fabricated floors lapped on the precast beam, the precast beam and the fabricated floors are both of reinforced concrete structures, a post-cast strip is arranged between the precast beam and the two fabricated floors, and the post-cast strip is arranged between the precast beam and the two fabricated floors. A plurality of rows of longitudinal bars are arranged in the prefabricated beam in the vertical direction, shear-resistant steel bars are arranged at the top of the prefabricated beam, the upper ends of the shear-resistant steel bars extend into the post-cast strip, two layers of steel bar nets are arranged in the fabricated floor slab, and criss-cross connecting steel bars are arranged in each layer of steel bar nets. The free ends of the connecting steel bars penetrate out of the fabricated floor slab, stretch into the post-cast strip and are bent, and the post-cast strip is filled with concrete. In practical application, the on-site construction efficiency is improved, and the construction progress is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of assembled buildings, and in particular to an installation structure of a fully assembled floor slab and beam. Background Art

[0002] In traditional building construction, floor slabs and beams are usually formed by on-site formwork, steel bar construction and then pouring concrete. The traditional construction method has a very large workload on site and requires a large number of construction workers to work at the same time. Not only is the construction period long, but the construction cost is also high. With the introduction of new building concepts, prefabricated buildings have been more and more widely used in my country and are an important trend in the development of the construction industry. In the construction of floor slabs and beams, prefabricated composite slabs are used for floor slabs, that is, floor slabs with a bottom plate and a layer of steel trusses. The use of prefabricated composite slabs reduces the laying of large-area floor slab bottom formwork and reduces the amount of on-site construction to a certain extent. However, the upper steel bars of the floor slabs and beam steel bars still need to be laid and tied on site by workers to connect the floor slabs and beams, which is time-consuming and labor-intensive. The construction efficiency is still low, and the hands of workers are easily scratched during the on-site steel bar tying process, which increases the construction cost. Utility Model Content

[0003] The utility model aims to provide a fully assembled floor slab and beam installation structure to improve construction efficiency and speed up construction progress.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a fully assembled floor and beam installation structure, comprising a precast beam and an assembled floor overlapped on the precast beam, the precast beam and the assembled floor are both reinforced concrete structures, a post-cast strip is arranged between the precast beam and the two assembled floor, a plurality of rows of longitudinal bars are arranged in the vertical direction in the precast beam, and shear steel bars are arranged on the top of the precast beam, the upper ends of the shear steel bars extend into the post-cast strip, two layers of steel mesh are arranged in the assembled floor, each layer of steel mesh is provided with criss-crossing connecting steel bars, the free ends of the connecting steel bars pass through the assembled floor and extend into the post-cast strip and are bent, and the post-cast strip is filled with concrete.

[0005] The principles and advantages of this solution are:

[0006] 1. In actual application, the prefabricated floor slabs and prefabricated beams in this solution are uniformly produced in the factory and only need to be assembled and connected on site. In addition, two layers of crisscross connecting steel bars are provided in the prefabricated floor slabs, and the connecting steel bars are covered with a concrete structure, so that the quality of the prefabricated floor slabs is uniform and the overall strength is high. There is no need to lay and tie the upper part of the floor slab and the beam steel bars on site as in the prior art, which also reduces the beam formwork and demolding processes, greatly reduces the workload, and shortens the construction period; it also effectively avoids workers' hand scratches due to on-site tying of steel bars, reducing the labor cost and overall cost of construction.

[0007] 2. The free end of the connecting steel bar of the prefabricated floor extends out of the prefabricated floor into the post-cast strip and is bent. The shear steel bar on the top of the prefabricated beam also extends into the post-cast strip. The connecting steel bar and the shear steel bar form a reinforced concrete structure with the concrete, so that the connection node between the prefabricated floor and the prefabricated beam has sufficient strength and rigidity. At the same time, the shear steel bar also makes the connection node have sufficient shear and earthquake resistance. The above installation structure makes the connection node between the prefabricated floor and the prefabricated beam have sufficient strength and rigidity while achieving simple and quick installation.

[0008] Furthermore, in the prefabricated floor slab, the free ends of the connecting steel bars of the upper layer are bent downward, and the free ends of the connecting steel bars of the lower layer are bent upward, and the upward bending length of the free ends of the connecting steel bars of the lower layer is greater than the downward bending length of the free ends of the connecting steel bars of the upper layer.

[0009] The upper connecting steel bars are bent downward to form an effective overlap with the lower connecting steel bars, so that the upper stress point is closer to the plate surface, which strengthens the force transmission of the joint and effectively improves the connection strength. At the same time, the upward bending length of the lower connecting steel bars is longer than the bending length of the upper connecting steel bars, so that the upper and lower connecting steel bars are staggered to form an effective shear resistance key, thereby improving the shear resistance of the overall structure.

[0010] Furthermore, the length of the free end of the connecting steel bar passing through the assembled floor slab and extending into the post-cast zone is 90-150 mm.

[0011] The above arrangement ensures that when adjacent prefabricated slabs are installed, the length of the prefabricated slabs placed on the prefabricated beams is not less than 15 mm, and there are connecting steel bars of sufficient length in the post-cast strips to make the reinforced concrete structure there have higher strength and make the overall connection structure more stable.

[0012] Furthermore, the concrete is slightly expanded fine stone concrete.

[0013] By adding micro-expansive agent to micro-expansive fine stone concrete, micro-expansion will occur during the hardening process of concrete, which will automatically compensate for shrinkage, reduce the joints between components, improve the density, and make the overall connection structure better. At the same time, it will enhance the durability of the structure and prevent water seepage.

[0014] Furthermore, an integrated wire tube is pre-buried in the prefabricated floor slab, and a plurality of hand hole grooves are provided on the side of the prefabricated floor slab, and the free end of the integrated wire tube passes through the prefabricated floor slab and is located in the hand hole groove.

[0015] The above arrangement makes it unnecessary to completely align the integrated wire pipes in two adjacent prefabricated floor slabs when they are docked and installed. It is only necessary to align the corresponding hand hole grooves, and then the position of the free end of the integrated wire pipe is adjusted in the hand hole groove for docking and installation, thereby reducing construction requirements and effectively improving construction efficiency. At the same time, it also reduces the position accuracy requirements of the integrated wire pipe in the prefabricated floor slab, increases the allowable position error range when laying pipes in the production process of the prefabricated floor slab, improves production efficiency, and effectively reduces production costs.

[0016] Furthermore, the length of the hand hole groove in the plane of the prefabricated floor is not less than 180 mm and the width is 180-220 mm.

[0017] The length of the hand hole groove in the above setting is not less than 180mm to facilitate the simultaneous arrangement of the free ends of multiple integrated wire tubes according to the actual line layout requirements. The width is 180-220mm to leave assembly margin for the integrated wire tubes in the adjacent prefabricated floor without affecting the bearing area of ​​the floor, so as to facilitate flexible adjustment of the line during actual layout, reduce assembly accuracy requirements and improve construction efficiency.

[0018] Furthermore, the tops of the precast beams and the assembled floor slabs are provided with hoisting grooves, and hoisting parts are embedded in the precast beams and the assembled floor slabs. The tops of the hoisting parts are located in the hoisting grooves and are lower than the top surfaces of the precast beams and the assembled floor slabs.

[0019] Compared with the prior art in which the lifting parts protrude from the component surface, in the above arrangement, there is no need to cut off the lifting parts on the component surface after the precast beams and prefabricated floor slabs are lifted, thereby reducing the construction process. At the same time, when pouring concrete, the lifting groove recessed into the top surface of the component enhances the connection strength between the cast-in-place concrete layer and the precast beams and prefabricated floor slabs.

[0020] Furthermore, the prefabricated beam is detachably connected with an adjustable supporting device at the upper part of both sides, and the adjustable supporting device includes a fixing plate and a supporting unit, the fixing plate is provided with two connecting holes and is welded with a connecting piece, and the connecting piece is vertically provided with a mounting hole, and the supporting unit includes a supporting plate and a supporting rod welded to the bottom of the supporting plate, an adjusting nut is threadedly connected to the supporting rod, and the support rod is inserted into the mounting hole.

[0021] The above arrangement eliminates the need for building a full-length scaffolding for support during installation of the prefabricated floor as in the prior art, thereby reducing the construction process of scaffolding erection and disassembly, greatly improving construction efficiency; and when the horizontal height of the prefabricated floor needs to be adjusted, the adjustment nut can be screwed with a wrench to meet the on-site support height adjustment requirements, and the construction flexibility is higher.

[0022] Furthermore, bolt sleeves for fixing the adjustable supporting device are pre-buried on both sides of the prefabricated beam.

[0023] The adjustable support device is detachably fixed to the lower prefabricated beam by means of bolts and bolt sleeves. The operation is simple and fast, which greatly improves the construction efficiency. The bolt connection makes it easy to disassemble and reuse the adjustable support device after the installation of the prefabricated floor slab is completed, thereby reducing construction costs.

[0024] Furthermore, a plurality of strip grooves are formed on the top surface of the prefabricated beam and the two end surfaces of the two assembled floor slabs facing each other, and the surface roughness of the strip grooves is greater than the surface roughness of the prefabricated beam and the assembled floor slabs.

[0025] In the above arrangement, the concrete in the post-cast strip enters the strip groove, which increases the bonding force between the concrete and the prefabricated components, making the connection between the prefabricated floor slab and the prefabricated beam more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.

[0027] Figure 2 It is a top view of the assembled floor slab according to an embodiment of the utility model.

[0028] Figure 3 for Figure 2 Sectional view along AA direction.

[0029] Figure 4 It is a schematic diagram of the installation of the hanging parts and the prefabricated beams in the embodiment of the utility model. DETAILED DESCRIPTION

[0030] The following is further described in detail through specific implementation methods:

[0031] The figure marks in the drawings of the specification include: precast beam 1, shear reinforcement 11, bolt sleeve 12, assembled floor slab 2, connecting reinforcement 21, hand hole groove 22, post-cast strip 3, lifting groove 4, lifting part 5.

[0032] The embodiment is basically as shown in the attached Figure 1-Figure 4As shown: a fully assembled floor and beam installation structure, including a precast beam 1 and an assembled floor 2 with its end overlapped on the precast beam 1, both the precast beam 1 and the assembled floor 2 are reinforced concrete structures, and a post-cast strip 3 is provided between the precast beam 1 and the assembled floor 2; multiple rows of longitudinal bars are distributed in the vertical direction in the precast beam 1, and multiple shear steel bars 11 are buried in the top of the precast beam 1, and the shear steel bars 11 are U-shaped steel bars, the open end of the U-shaped steel bar is buried downward in the precast beam 1, and the other end extends upward into the post-cast strip 3; two layers of steel mesh are provided in the assembled floor 2, and each layer of steel mesh is provided with criss-crossing connecting steel bars 21, and the free ends of the two layers of connecting steel bars 21 extend outwardly through the assembled floor 2 and extend into the post-cast strip 3, and the free ends of the connecting steel bars 21 passing through the assembled floor 2 are bent at 90 degrees, and the upper connecting steel bars 21 are bent downward, and the lower connecting steel bars The ribs 21 are bent upward, and the upward bending length of the free end of the connecting steel bar 21 of the lower layer is greater than the downward bending length of the free end of the connecting steel bar 21 of the upper layer, and the outward extending length of the connecting steel bar 21 of the lower layer is greater than the outward extending length of the connecting steel bar 21 of the upper layer, so as to ensure that the upper and lower layers of the connecting steel bars 21 are staggered to form an effective shear key, thereby improving the shear resistance of the connecting structure; the outward extending length of the connecting steel bar 21 of the lower layer is 90-150mm, so as to ensure that the resting length of the end of the assembled wall panel on the prefabricated beam 1 is not less than 15mm, and at the same time ensure that the end of the connecting steel bar 21 has sufficient length to extend into the post-cast strip 3 and connect with the concrete, thereby ensuring the stability of the connecting structure; the post-cast strip 3 is filled with concrete, and the concrete is a slightly expanded fine stone concrete, and the concrete, the shear steel bars 11 and the connecting steel bars 21 form an integrated reinforced concrete structure.

[0033] like Figure 2 As shown, an integrated wire tube is embedded in the assembled floor 2, and the assembled floor 2 has a plurality of hand hole grooves 22 on its side. The free end of the integrated wire tube passes through the assembled floor 2 and is located in the hand hole groove 22, and the free end face of the integrated wire tube is flush with the outermost edge surface of the assembled floor 2, wherein the length of the hand hole groove 22 in the plane of the assembled floor 2 is not less than 180mm, and the width is 180-220mm. Through the above arrangement, when the integrated wire tubes of two adjacent assembled floors 2 are docked and installed, the integrated wire tubes on both sides do not need to be precisely aligned, and the movable space of the hand hole groove 22 is convenient for adjusting the position of the free end of the integrated wire tube according to the actual construction situation, effectively reducing the construction difficulty and improving the construction efficiency.

[0034] like Figure 1As shown, bolt sleeves 12 are embedded in the upper part of both sides of the prefabricated beam 1, and the adjustable support device independently developed by the applicant is fixed by bolts through the bolt sleeves 12. The adjustable support device includes a fixing plate and a support unit. The fixing plate is provided with two connection holes corresponding to the bolt sleeves 12 and welded with a connecting piece. The connecting piece is vertically provided with a mounting hole. The support unit includes a support plate and a support rod welded to the bottom of the support plate. The support rod is threaded with an adjustment nut, and the support rod is inserted into the mounting hole. When the prefabricated floor 2 is installed, the bolt passes through the connection hole to fix the adjustable support device on the prefabricated beam 1, and then the prefabricated floor 2 is placed on the adjustable support device for support. When the horizontal height of the prefabricated floor 2 needs to be adjusted, the adjustment nut can be screwed with a wrench. In this way, there is no need to set up a scaffold to support the floor, thereby reducing the construction process of scaffolding erection and disassembly, greatly improving the construction efficiency. At the same time, after the construction of the prefabricated floor 1 is completed, the adjustable support device can be disassembled from the bolt sleeve 12 for reuse.

[0035] A plurality of strip grooves are provided on the top surface of the precast beam 1 and the two facing end surfaces of the two assembled floor slabs 2, and the surface roughness of the strip grooves is greater than the surface roughness of the precast beam 1 and the assembled floor slab 2. Through the above arrangement, the concrete in the post-cast strip 3 enters the strip grooves, increasing the bonding force between the concrete and the precast components, making the connection between the assembled floor slab 2 and the precast beam 1 more stable.

[0036] like Figure 2 , Figure 4 As shown in the combination, a hoisting groove 4 is provided on the top of the precast beam 1 and the assembled floor slab 2. The hoisting groove 4 is preferably hemispherical. A hoisting member 5 is embedded on the precast beam 1 and the assembled floor slab 2. The hoisting member 5 is generally large at both ends and small in the middle. Specifically, the top of the hoisting member 5 is a disc or a hemispherical body, and the bottom of the hoisting member 5 is a disc, or it can be formed by a plurality of steel bars distributed equidistantly. The top of the hoisting member 5 is located in the hoisting groove 4 and does not exceed the upper surface of the precast beam 1 or the assembled floor slab 2. Through the above structure, compared with the hoisting member 5 protruding from the surface of the component in the prior art, the present solution does not need to cut off the hoisting member 5 protruding from the surface of the component after the hoisting is completed, thus reducing the construction process. At the same time, when the concrete is cast in place, due to the concave hoisting groove 4 and the top structure of the hoisting member 5 in the form of a disc or a hemispherical body, the connection strength between the cast-in-place concrete layer and the component is enhanced.

[0037] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A fully assembled floor and beam installation structure, characterized in that: It includes precast beams and prefabricated floor slabs overlapped on the precast beams, both of which are reinforced concrete structures, a post-cast strip is provided between the precast beams and the two prefabricated floor slabs, a plurality of rows of longitudinal bars are provided in the precast beams along the vertical direction, and shear steel bars are provided on the top of the precast beams, the upper ends of the shear steel bars extend into the post-cast strip, two layers of steel mesh are provided in the prefabricated floor slabs, each layer of steel mesh is provided with criss-crossing connecting steel bars, the free ends of the connecting steel bars pass through the prefabricated floor slabs and extend into the post-cast strips and are bent, and the post-cast strips are filled with concrete.

2. The fully assembled floor and beam installation structure according to claim 1, characterized in that: The free ends of the upper connecting steel bars in the assembled floor are bent downward, and the free ends of the lower connecting steel bars are bent upward, and the upward bending length of the free ends of the lower connecting steel bars is greater than the downward bending length of the free ends of the upper connecting steel bars.

3. The fully assembled floor slab and beam installation structure according to claim 2, characterized in that: The free end of the connecting steel bar passes out of the assembled floor slab and extends into the post-cast zone by a length of 90-150 mm.

4. The fully assembled floor slab and beam installation structure according to claim 3 is characterized in that: The concrete is slightly expanded fine stone concrete.

5. The fully assembled floor slab and beam installation structure according to claim 4, characterized in that: An integrated wire tube is pre-buried in the assembled floor slab, and a plurality of hand hole grooves are arranged on the side of the assembled floor slab. The free end of the integrated wire tube passes through the assembled floor slab and is located in the hand hole groove.

6. The fully assembled floor slab and beam installation structure according to claim 5, characterized in that: The length of the hand hole groove in the plane of the assembled floor is not less than 180mm and the width is 180-220mm.

7. The fully assembled floor slab and beam installation structure according to claim 6, characterized in that: The tops of the prefabricated beams and the assembled floor slabs are provided with hoisting grooves, and hoisting parts are embedded in the prefabricated beams and the assembled floor slabs. The tops of the hoisting parts are located in the hoisting grooves and are lower than the top surfaces of the prefabricated beams and the assembled floor slabs.

8. The fully assembled floor slab and beam installation structure according to claim 7, characterized in that: The prefabricated beam is detachably connected with an adjustable supporting device at the upper part of both sides, and the adjustable supporting device includes a fixing plate and a supporting unit. The fixing plate is provided with two connecting holes and a connecting piece is welded thereto, and a mounting hole is vertically provided on the connecting piece. The supporting unit includes a supporting plate and a supporting rod welded to the bottom of the supporting plate, and an adjusting nut is threadedly connected to the supporting rod, and the supporting rod is inserted into the mounting hole.

9. The fully assembled floor slab and beam installation structure according to claim 8, characterized in that: Bolt sleeves for fixing the adjustable supporting device are pre-buried on both sides of the prefabricated beam.

10. A fully assembled floor slab and beam installation structure according to claim 9, characterized in that: A plurality of strip grooves are formed on the top surface of the prefabricated beam and the two end surfaces of the two assembled floor slabs facing each other, and the surface roughness of the strip grooves is greater than the surface roughness of the prefabricated beam and the assembled floor slabs.

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