A bottom die detachable steel bar truss floor support plate and construction method

Abstract

The application discloses a detachable bottom mould steel bar truss floor support plate and a construction method, relates to the technical field of building construction, and solves the technical problem that the assembly efficiency of the existing bottom mould and the steel bar truss is low, and the floor concrete has holes after the formwork is removed, thereby affecting decoration delivery. The application comprises a bottom mould, a pull-tab support, a steel bar truss and a bolt. The pull-tab support is inserted into the bottom mould in a matrix mode and is fixed by the bolt. The pull-tab support is connected with the steel bar truss. The pull-tab support is provided with a V-shaped breaking structure, is simple to remove, and has no hole residues in the concrete. The U-shaped grooves of the pull-tab support are in the same direction, the truss and the support are simple and convenient to install, the construction efficiency is greatly improved, the concrete has no holes after the formwork is removed, the bottom mould and the bolt are recycled, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, and more specifically to a steel truss floor deck with a detachable bottom formwork and a construction method thereof. Background Technology

[0002] Reinforced truss floor decking is constructed by welding upper and lower longitudinal steel bars (i.e., upper and lower chords) with bent small-diameter steel bars (i.e., web reinforcement) to form a small truss with a certain rigidity and load-bearing capacity. This small truss is then welded to profiled steel sheets, and finally, cast-in-place concrete is poured into the deck. Reinforced truss floor decking offers advantages such as high overall rigidity and good seismic performance. Due to its short construction period and easy quality control, it has been widely used in many projects both domestically and internationally in recent years. As a concrete casting technology for floors, reinforced truss floor decking integrates the formwork and reinforcement, fully utilizing the load-bearing capacity of the reinforcement while also fulfilling the function of the formwork for concrete forming.

[0003] Steel truss floor decking is mainly divided into two categories: those with removable bottom formwork and those with non-removable bottom formwork.

[0004] Non-removable bottom formwork: The bottom formwork is welded and fixed to the truss as a whole, resulting in a large waste of bottom formwork material costs, high costs, and difficulties in later decoration.

[0005] Demountable bottom formwork: The bottom formwork is fixed to the steel truss with pads and bolts. The installation is complicated and inefficient. After the formwork is removed, there are holes in the concrete on the floor, resulting in poor appearance and affecting the delivery of the finished product. Summary of the Invention

[0006] The purpose of this invention is to solve the technical problems of existing detachable bottom formwork, which uses spacers and bolts to connect and fix the bottom formwork and steel truss, resulting in complex installation, low efficiency, and voids in the concrete floor after formwork removal, leading to poor appearance and affecting the delivery of finished products. This invention provides a steel truss floor deck with a detachable bottom formwork and a construction method therefor.

[0007] The technical solution adopted in this invention is as follows: a steel truss floor deck with a detachable bottom formwork, comprising a bottom formwork, tie plate supports, a steel truss, and pins. The tie plate supports are inserted into the bottom formwork in a matrix and fixed with pins. The tie plate supports are snapped together with the steel truss.

[0008] Specifically, this invention mainly consists of a bottom mold, a steel truss, a tie plate support, and a pin. The bottom mold can be made of aluminum, steel, plywood, etc., and has several rectangular slots for connecting and fixing triangular support plates. The steel truss consists of two lower chord steel bars and one upper chord steel bar, which are welded together by web reinforcement. The tie plate support is T-shaped, with two U-shaped grooves on the upper part for installing and fixing the steel truss. The lower part has opposite feet on both sides for more stable installation and support. The bottom has pin holes for inserting pins to constrain and fix the steel truss to the bottom mold. The bottom has a V-shaped groove as a break point to facilitate the disassembly of the support plate and prevent holes from being left in the concrete. The pin has two parts: a cap and a shaft. The cap is elliptical, and the small diameter of the cap is the same as that of the shaft. This prevents interference between the pin and the bottom mold during installation. The improved component of this invention is the tie plate support, which allows the bottom mold to be disassembled without leaving any holes in the concrete after disassembly, eliminating difficulties in finishing and delivery.

[0009] The bottom mold includes a template body and reinforcing ribs. One side of the template body is connected to the reinforcing ribs at intervals. The template body has rectangular grooves in a matrix. One end of the template body also has mounting holes at intervals.

[0010] The main body of the template is made of aluminum, steel or plywood.

[0011] The pull tab support includes a T-shaped pull tab body. The upper horizontal sides of the T-shaped pull tab body are provided with two U-shaped grooves in the same direction. The lower horizontal sides of the T-shaped pull tab body are provided with opposite feet. The longitudinal corner of the T-shaped pull tab body is provided with a V-shaped groove. The longitudinal bottom of the T-shaped pull tab body is provided with a pin hole.

[0012] The pin includes a pin cap and a pin shaft. One end of the pin shaft is provided with a frustoconical end, and the other end of the pin shaft is connected to the pin cap. The pin cap is elliptical in shape, and the minor diameter of the pin cap is the same as the shaft diameter of the pin shaft.

[0013] The pin has a radial locating hole.

[0014] The steel truss includes top chord steel bars, web bars, and bottom chord steel bars. Two bottom chord steel bars and one top chord steel bar are welded together with web bars to form a triangular frame.

[0015] The web reinforcement is a wavy web reinforcement made by bending a single steel bar back and forth at right angles. The upper chord steel bar is connected to the upper right angle of the web reinforcement, and the lower chord steel bar is connected to the lower right angle of the web reinforcement.

[0016] A construction method for a steel truss floor slab with a detachable bottom formwork includes the following steps:

[0017] S1. Complete the assembly of the bottom mold and the pull plate support, and fix them with pins;

[0018] S2. The steel truss is assembled with the bottom formwork and tie plate support. The lower chord steel bar is slid in from one side of the U-groove to be fixed, thus assembling the floor deck.

[0019] S3. Then install the assembled floor decking onto the floor and pour concrete.

[0020] S4. After the concrete reaches the demolding condition, remove the pins and bottom formwork in sequence, break off the bottom end of the tie plate support, and break it at the V-groove.

[0021] The removed pins and bottom mold can be recycled.

[0022] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0023] The tie plate support of the present invention has a V-shaped dismantling structure, which makes dismantling simple and leaves no pores in the concrete. The U-shaped grooves of the tie plate support are in the same direction, making the installation of the truss and the support simple and convenient, greatly improving construction efficiency. Moreover, there are no pores in the concrete after demolding, and the bottom formwork and pins can be recycled, reducing costs. Attached Figure Description

[0024] The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

[0025] Figure 1 This is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the right-side structure of the present invention;

[0027] Figure 3 This is a top view of the bottom mold structure of the present invention;

[0028] Figure 4 This is a schematic diagram of the bottom mold structure of the present invention from below;

[0029] Figure 5 This is a schematic diagram of the steel truss structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the pull tab support structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the pin structure of the present invention;

[0032] The markings in the diagram are as follows: 1-bottom formwork, 2-tie plate support, 3-steel truss, 4-pin, 11-formwork body, 12-rectangular groove, 13-installation hole, 14-reinforcing bar, 21-U-groove, 22-V-groove, 23-T-type tie plate body, 24-pin hole, 25-foot, 31-upper chord reinforcement, 32-web reinforcement, 33-lower chord reinforcement, 41-pin cap, 42-pin shaft, 43-limiting hole, 44-conical end. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0035] Example 1

[0036] like Figure 1-7 As shown, this embodiment provides a steel truss floor deck with a detachable bottom formwork, including a bottom formwork 1, tie rod supports 2, a steel truss 3, and pins 4. The tie rod supports 2 are inserted into the bottom formwork 1 in a matrix and fixed with pins 4. The tie rod supports 2 are snapped into the steel truss 3. The bottom formwork 1 includes a template body 11 and reinforcing ribs 14. One side of the template body 11 is connected to the reinforcing ribs 14 at intervals. The template body 11 has rectangular grooves 12 in a matrix, and one end of the template body 11 also has mounting holes 13 at intervals. The template body 11 is made of aluminum, steel, or plywood. The tie rod supports 2 include T-shaped tie rod bodies 23. The upper horizontal sides of the T-shaped tie rod body 23 have two unidirectional U-grooves 21, the lower horizontal sides of the T-shaped tie rod body 23 have opposite bottom feet 25, the longitudinal corners of the T-shaped tie rod body 23 have V-grooves 22, and the longitudinal bottom of the T-shaped tie rod body 23 has pin holes 24. The pin 4 includes a pin cap 41 and a pin shaft 42. One end of the pin shaft 42 has a frustoconical end 44, and the other end of the pin shaft 42 is connected to the pin cap 41. The pin cap 41 is elliptical, and its minor diameter is the same as the shaft diameter of the pin shaft 42. The pin shaft 42 has a radial limiting hole 43. The steel truss 3 includes an upper chord steel bar 31, a web bar 32, and a lower chord steel bar 33. Two lower chord steel bars 33 and one upper chord steel bar 31 are welded together to form a triangular frame through the web bar 32. The web bar 32 is a wavy web bar 32 formed by bending a single steel bar back and forth at right angles. The upper chord steel bar 31 is connected to the upper right angle of the web bar 32, and the lower chord steel bar 33 is connected to the lower right angle of the web bar 32.

[0037] Specifically, this invention mainly consists of a bottom mold 1, a steel truss 3, a tie plate support 2, and pins 4. The bottom mold 1 can be made of aluminum, steel, plywood, etc., and has several rectangular slots 12 for connecting and fixing triangular support pieces. The steel truss 3 consists of two lower chord steel bars 33 and one upper chord steel bar 31, which are welded together by web reinforcement 32. The tie plate support 2 is T-shaped, with two U-shaped grooves 21 on the upper part for installing and fixing the steel truss 3, and reverse-oriented feet on both sides of the lower part. 25. The installation support is more stable; the bottom is provided with a pin hole 24, into which the pin 4 is inserted to constrain and fix the steel truss 3 to the bottom formwork 1; the bottom is provided with a V-groove 22 as a break, which facilitates the disassembly of the support plate and achieves no holes left in the concrete; the pin 4 is divided into a cap 41 and a pin shaft 42. The cap 41 is elliptical and the minor diameter of the cap 41 is the same as that of the pin shaft 42. The pin 4 can prevent interference when it is installed with the bottom formwork 1. The improved component of this invention is a tie plate support 2, which can make the bottom formwork 1 detachable, and after the formwork is disassembled, there are no holes left in the concrete, and there are no difficulties in finishing and delivery.

[0038] Example 2

[0039] Based on Example 1, a construction method for a steel truss floor slab with a detachable bottom formwork includes the following steps:

[0040] S1. Complete the assembly of the bottom mold 1 and the pull plate support 2, and fix them by the pin 4;

[0041] S2. The steel truss is assembled with the bottom formwork 1 and the tie plate support 2. The lower chord steel bar 33 is slid in from one side of the U-groove 21 to be fixed, thus assembling the floor deck.

[0042] S3. Then install the assembled floor decking onto the floor and pour concrete.

[0043] S4. After the concrete reaches the demolding condition, remove the pin 4 and bottom formwork 1 in sequence, break the bottom end of the tie plate support 2, and break it at the V-groove 22.

[0044] S5. The removed pin 4 and bottom mold 1 can be recycled.

Claims

1. A steel truss floor deck with a detachable bottom formwork, comprising a bottom formwork (1), tie rod supports (2), a steel truss (3), and pins. (4), characterized in that, The pull tab support (2) is inserted into the bottom mold (1) in a matrix and fixed with pins (4). It is connected to the steel truss (3); the pull plate support (2) includes a T-shaped pull plate body (23), which has two U-shaped grooves (21) on the upper horizontal side, two opposite bottom feet (25) on the lower horizontal side, a V-shaped groove (22) at the longitudinal corner of the T-shaped pull plate body (23), and a pin hole (24) at the longitudinal bottom of the T-shaped pull plate body (23).

2. The steel truss floor deck with detachable bottom formwork according to claim 1, characterized in that, The bottom mold (1) includes a template body (11) and reinforcing ribs (14). One side of the template body (11) is connected to the reinforcing ribs (14) at intervals. The template body (11) has rectangular grooves (12) in a matrix. One end of the template body (11) also has mounting holes (13) at intervals.

3. A steel truss floor deck with a detachable bottom formwork according to claim 2, characterized in that, The template body (11) is made of aluminum, steel or plywood.

4. A steel truss floor deck with a detachable bottom formwork according to claim 1, characterized in that, The pin (4) includes a pin cap (41) and a pin shaft (42). One end of the pin shaft (42) is provided with a frustoconical end (44), and the other end of the pin shaft (42) is connected to the pin cap (41). The pin cap (41) is elliptical, and the minor diameter of the pin cap (41) is the same as the shaft diameter of the pin shaft (42).

5. A steel truss floor deck with a detachable bottom formwork according to claim 4, characterized in that, The pin (42) has a radially opening limit hole (43).

6. A steel truss floor deck with a detachable bottom formwork according to claim 1, characterized in that, The steel truss (3) includes an upper chord steel bar (31), a web bar (32), and a lower chord steel bar (33). Two lower chord steel bars (33) and one upper chord steel bar (31) are welded together by the web bar (32) to form a triangular frame.

7. A steel truss floor deck with a detachable bottom formwork according to claim 6, characterized in that, The web reinforcement (32) is a wavy web reinforcement (32) made by bending a steel bar back and forth at right angles. The upper chord steel bar (31) is connected to the upper right angle of the web reinforcement (32), and the lower chord steel bar (33) is connected to the lower right angle of the web reinforcement (32).

8. A construction method for a steel truss floor slab with a detachable bottom formwork as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Complete the assembly of the bottom mold (1) and the pull plate support (2), and fix them by the pin (4); S2, the steel truss (3) is assembled with the bottom formwork (1) and the tie plate support (2). The lower chord steel bar (33) is slid into the U-groove (21) from one side to be fixed, that is, the floor deck is assembled. S3. Then install the assembled floor decking onto the floor and pour concrete. S4. After the concrete reaches the demolding condition, remove the pin (4) and bottom formwork (1) in sequence, break the bottom end of the tie plate support (2), and break it at the V-groove (22).

9. A construction method for a steel truss floor slab with a detachable bottom formwork according to claim 8, characterized in that, The removed pin (4) and bottom mold (1) can be recycled.

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