Civil engineering foundation pit assembly type steel-concrete combined supporting structure

Abstract

The utility model discloses a civil engineering foundation pit assembly type steel-concrete combined supporting structure, and belongs to the technical field of buildings and civil engineering. The utility model discloses a civil engineering foundation pit assembly type steel-concrete combined supporting structure which comprises H-shaped steel and connecting assemblies assembled and connected to the two ends of the H-shaped steel. First reinforcing steel bars are fixedly connected to the two opposite inner walls of the H-shaped steel. A pouring hole used for pouring concrete is formed in an H-shaped steel web plate close to the end of the H-shaped steel. The top and the bottom of the H-shaped steel are further provided with sealing assemblies used for sealing the H-shaped steel in an assembled and connected mode. A pouring opening is reserved in the sealing assembly at the top of the H-shaped steel; during use, firstly, the light H-shaped steel is fixed in a foundation pit, then the H-shaped steel is sealed through the sealing assembly, the pouring opening and the pouring hole are reserved through the sealing assembly, and then concrete can be poured into the upper-lower double-layer structure of the H-shaped steel. The technical problems that in the prior art, the whole prefabricated steel-concrete structure is heavy, and time and labor are wasted when the prefabricated steel-concrete structure is installed in a foundation pit are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of construction and civil engineering, and more specifically to an assembled steel-concrete composite supporting structure for a foundation pit of a civil engineering project. Background Art

[0002] During the excavation process of the foundation pit, in order to avoid collapse accidents, support structures are usually used to support the area around the foundation pit. The steel-concrete support structure combines the advantages of steel structure and concrete structure. It can withstand huge weight and external pressure while providing reliable support and stability. It is widely used in the fields of construction and civil engineering.

[0003] However, current steel-concrete structures are usually prefabricated in factories. The overall structure is heavy, which makes installation time-consuming and labor-intensive. In addition, due to the heavy overall structure, it is inconvenient to adjust according to the actual situation in the foundation pit during installation, which greatly reduces the efficiency of construction. Utility Model Content

[0004] 1. Technical problems to be solved by the utility model

[0005] In response to the problem in the prior art that the prefabricated steel-concrete structure is heavy as a whole and time-consuming and labor-intensive to install in the foundation pit, the utility model provides a prefabricated steel-concrete composite support structure for a civil engineering foundation pit. By assembling H-shaped steel, connecting components and closing components on-site in the foundation pit and then pouring concrete, the method of installing first and then pouring is adopted, which achieves the effect of convenience and labor-saving when installing in the foundation pit.

[0006] 2. Technical solution

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is:

[0008] A prefabricated steel-concrete composite support structure for a civil engineering foundation pit comprises an H-shaped steel and a connection assembly assembled and connected to both ends of the H-shaped steel; first reinforcing steel bars are fixedly connected to two opposing inner walls of the H-shaped steel, and a pouring hole for pouring concrete is provided on the web of the H-shaped steel near the end of the H-shaped steel; a closing assembly for closing the H-shaped steel is also assembled and connected at the top and bottom of the H-shaped steel; a pouring opening is reserved at the closing assembly at the top of the H-shaped steel; when in use, the lighter H-shaped steel is first fixed in the foundation pit, and then the H-shaped steel is closed by the closing assembly, and concrete can be poured into the upper and lower double-layer structure of the H-shaped steel through the reserved pouring opening and pouring hole of the closing assembly.

[0009] According to a further technical solution, the first reinforcing steel bar is in the form of a U-shaped ring, and the ring foot is fixedly connected to the inner wall of the H-shaped steel to improve the bonding strength with the poured concrete.

[0010] A further technical solution is that the U-shaped rings on the two inner walls of the H-shaped steel are staggered to further improve the bonding strength with the poured concrete.

[0011] A further technical solution also includes a second reinforcing steel bar that passes through the U-shaped ring horizontally and is fixedly connected to the connecting assembly at both ends, wherein at least one second reinforcing steel bar passes through the U-shaped rings on the two inner walls of the H-shaped steel at the same time to form a locking connection, which not only improves the bonding strength with the poured concrete, but also improves the overall structural strength.

[0012] A further technical solution is that there are multiple H-shaped steels arranged side by side, and a reinforcement component is connected between two adjacent H-shaped steels, so that the multiple H-shaped steels can cooperate with each other to improve the supporting strength of the foundation pit.

[0013] A further technical solution is that the closing component includes a closing plate, a connecting block is fixed on the plate surface near the end of the closing plate, a connecting groove is provided on the outer surface of the flange plate near the end of the H-shaped steel, the closing plate is coordinated with the top and bottom of the H-shaped steel, and the corresponding connecting blocks and connecting grooves are coordinated. The connecting blocks can be snapped into the connecting grooves to realize on-site assembly. The top closing plate of the H-shaped steel has a reserved pouring opening to facilitate pouring.

[0014] A further technical solution is that the connecting assembly includes a connecting plate and a shock-absorbing assembly. The two side surfaces of the connecting plate are fixedly connected to the end of the H-shaped steel and the shock-absorbing assembly respectively, which is convenient for adjustment according to the actual situation in the foundation pit during installation to improve construction accuracy and efficiency.

[0015] A further technical solution is that the shock-absorbing assembly includes a sliding seat and a damping slider slidably connected to the sliding seat 23. The end of the damping slider away from the sliding seat is connected to the connecting plate. A shock-absorbing spring is also provided inside the sliding seat. The other end of the shock-absorbing spring is fixed on the damping slider. While realizing adaptive adjustment within the elastic range of the shock-absorbing spring in the foundation pit, it can also reduce the impact and damage to the foundation pit and the entire support device, thereby maintaining the overall stability of the foundation pit support device.

[0016] According to a further technical solution, one end of the sliding seat away from the damping slider is fixedly connected to a connecting plate, and the other end of the connecting plate is in contact with the inner wall of the foundation pit. Fixing holes are provided on the four corners of the connecting plate to facilitate fixing with bolts.

[0017] According to a further technical solution, a plurality of triangular reinforcing ribs are installed at the connection between the sliding seat and the connecting plate to improve the supporting strength.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0020] (1) When using the assembled steel-concrete composite support structure for the foundation pit of the utility model, the lighter H-shaped steel is first fixed in the foundation pit, and then the H-shaped steel is closed by a closing plate. Concrete can be poured into the H-shaped steel through the pouring hole, so that the solidified concrete is combined with the H-shaped steel. By setting the installation first and then pouring, the convenience of installation is greatly increased and the installation is convenient;

[0021] (2) The prefabricated steel-concrete composite support structure of the civil engineering foundation pit of the present invention realizes a prefabricated design, which enables rapid installation and disassembly of the various components. This not only improves construction efficiency and reduces construction costs, but also provides convenience for subsequent foundation pit maintenance and renovation. At the same time, the prefabricated design also makes the structure highly reusable, which is beneficial to resource conservation and environmental protection.

[0022] (3) The utility model of the assembled steel-concrete composite support structure for the civil engineering foundation pit greatly enhances the overall stability of the structure by installing a reinforcing rod between two H-shaped steels and fixing them with a fixing plate. The addition of the reinforcing components makes the entire support structure more solid and reliable when subjected to external forces, effectively ensuring the safety and stability of the foundation pit construction;

[0023] (4) The utility model provides an assembled steel-concrete composite support structure for a civil engineering foundation pit. When the foundation pit vibrates laterally due to natural disasters such as earthquakes or human factors, the shock-absorbing spring in the sliding seat can buffer the lateral impact force, thereby reducing the impact and damage to the foundation pit and the support device, thereby maintaining the overall stability of the foundation pit support device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the assembled steel-concrete composite support structure for a civil foundation pit according to a specific embodiment;

[0025] Figure 2 This is a schematic diagram of an H-shaped steel structure according to a specific embodiment;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0027] Figure 4 is a schematic structural diagram of a sealing assembly according to a specific embodiment;

[0028] Figure 5 Schematic diagram of the structure of the connection component of a specific embodiment.

[0029] In the figure: 1, H-beam; 11, grouting hole; 12, first reinforcing steel bar; 13, second reinforcing steel bar; 14, connection groove; 15, screw hole; 16, H-beam web; 17, H-beam flange plate;

[0030] 2. Connecting assembly; 21. Connecting plate; 22. Damping slider; 23. Sliding seat; 24. Connecting plate; 25. Fixing hole; 26. Triangular reinforcement rib;

[0031] 3. Closing assembly; 31. Closing plate; 32. Connecting block; 33. Connecting hole;

[0032] 4. Reinforcement assembly; 41. Reinforcement rod; 42. Fixing plate. DETAILED DESCRIPTION

[0033] In order to further understand the content of the utility model, the utility model is described in detail with reference to the accompanying drawings.

[0034] Example 1

[0035] The assembled steel-concrete composite support structure of the foundation pit of this embodiment is as follows: Figure 1 、 2 As shown in Figure 3, it includes an H-shaped steel 1 and a connecting component 2 assembled and connected to the two ends of the H-shaped steel 1, the H-shaped steel 1 includes an H-shaped steel web 16 and an H-shaped steel flange plate 17 connected to the two ends of the H-shaped steel web 16; the two opposite inner walls of the H-shaped steel 1 are fixedly connected with a first reinforcing steel bar 12, and a pouring hole 11 for pouring concrete is provided on the H-shaped steel web 16 near the end of the H-shaped steel 1; the top and bottom of the H-shaped steel 1 are also assembled and connected with a closing component 3 for closing the H-shaped steel 1; the closing component 3 at the top of the H-shaped steel 1 reserves a pouring opening.

[0036] When using the prefabricated steel-concrete composite support structure for the civil engineering foundation pit of this embodiment, the H-shaped steel 1, which is lighter than the prefabricated steel-concrete structure in the prior art, is first fixed in an H shape in the foundation pit. The connecting component 2 can be a connecting plate 24, which is pressed against the wall of the foundation pit; then the H-shaped upper and lower openings of the H-shaped steel 1 are closed by the closing component 3, and the pouring openings and pouring holes 11 reserved by the closing component 3 can be used to pour concrete into the upper and lower double-layer structures of the H-shaped steel 1 with the H-shaped steel web 16 as the boundary, so that the solidified concrete is combined with the H-shaped steel 1. By setting the installation first and then pouring method, the convenience during installation is greatly increased, and the installation is convenient and labor-saving.

[0037] Example 2

[0038] The basic structure of the assembled steel-concrete composite support structure for the foundation pit of this embodiment is the same as that of embodiment 1, except that: Figure 1 、 2 As shown in Figure 3, the first reinforcing steel bar 12 is in a U-shaped ring shape, and the ring foot is fixedly connected to the inner wall of the H-shaped steel 1 to improve the bonding strength with the poured concrete. The U-shaped rings on the two inner walls of the H-shaped steel 1 are staggered to further improve the bonding strength with the poured concrete.

[0039] It also includes a second reinforcing steel bar 13 that passes through the U-shaped ring horizontally and is fixedly connected to the connecting component 2 at both ends. At least one second reinforcing steel bar 13 passes through the U-shaped rings on the two inner walls of the H-shaped steel 1 at the same time to form a locking connection, which not only improves the bonding strength with the poured concrete, but also improves the overall structural strength.

[0040] like Figure 1 As shown, there are multiple H-shaped steels 1 arranged side by side, and a reinforcement component 4 is connected between two adjacent H-shaped steels 1, so that the multiple H-shaped steels 1 can cooperate with each other to improve the supporting strength of the foundation pit. The reinforcement component 4 includes a reinforcement rod 41, and a fixing plate 42 is installed at both ends of the reinforcement rod 41. The two fixing plates 42 are respectively abutted against the side walls of adjacent H-shaped steels 1. Each fixing plate 42 is threaded with a plurality of fixing bolts. The fixing plate 42 is fixed to the H-shaped steel 1 by a plurality of fixing bolts, which greatly enhances the overall stability of the structure. The addition of the reinforcement component 4 makes the entire supporting structure more solid and reliable when subjected to external forces, effectively ensuring the safety and stability of the foundation pit construction.

[0041] like Figure 4 As shown, the closing assembly 3 includes a closing plate 31, and a connecting block 32 is fixed on the plate surface near the end of the closing plate 31. Figure 3 As shown, a connecting groove 14 is provided on the outer surface of the flange plate 17 near the end of the H-shaped steel 1, and the closing plate 31 is cooperated with the top and bottom of the H-shaped steel 1. The corresponding connecting block 32 is cooperated with the connecting groove 14. The connecting block 32 can be slidably inserted or clamped in the connecting groove 14. A plurality of screw holes 15 are also provided on the H-shaped steel 1. Each screw hole 15 passes through the surface of the H-shaped steel and extends to the adjacent connecting groove 14. A bolt is provided on each screw hole 15; each connecting block 32 is provided with two connecting holes 33, and the position of each connecting hole 33 is the same as the position of the adjacent screw hole to realize on-site assembly. The top closing plate 31 of the H-shaped steel 1 reserves a pouring opening to facilitate pouring.

[0042] like Figure 1 、 5As shown, the connection assembly 2 includes a connection plate 21 and a shock-absorbing assembly. The two side surfaces of the connection plate 21 are fixedly connected to the end of the H-shaped steel 1 and the shock-absorbing assembly respectively, so that it is convenient to adjust according to the actual situation in the foundation pit during installation to improve construction accuracy and efficiency. The shock-absorbing assembly includes a sliding seat 23 and a damping slider 22 slidably connected to the sliding seat 23. The end of the damping slider 22 away from the sliding seat 23 is connected to the connection plate 21. A shock-absorbing spring is also provided inside the sliding seat 23. The other end of the shock-absorbing spring is fixed to the damping slider 22 to achieve adaptive adjustment within the elastic range of the shock-absorbing spring in the foundation pit. When the foundation pit vibrates laterally due to natural disasters such as earthquakes or human factors, the shock-absorbing spring in the sliding seat 23 can buffer the lateral impact force to reduce the impact and damage to the foundation pit and the entire support device, thereby maintaining the overall stability of the foundation pit support device. The end of the sliding seat 23, away from the damping slider 22, is fixedly connected to a connecting plate 24. The other end of the connecting plate 24 abuts the inner wall of the foundation pit. The four corners of the connecting plate 24 are provided with fixing holes 25, each of which is equipped with a fixing bolt for convenient bolt fixing. A number of triangular reinforcing ribs 26 are also installed at the connection between the sliding seat 23 and the connecting plate 24 to increase support strength.

[0043] The prefabricated steel-concrete composite support structure of the civil engineering foundation pit of this embodiment adopts a detachable prefabricated design, so that the various components can be quickly installed and disassembled. This not only improves construction efficiency and reduces construction costs, but also provides convenience for subsequent foundation pit maintenance and renovation. At the same time, the prefabricated design also makes the structure highly reusable, which is beneficial to resource conservation and environmental protection.

[0044] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure and manufacturing steps are not limited thereto. Therefore, if a person skilled in the art is inspired by the above and, without departing from the purpose of the present invention, designs a structure and embodiment similar to the technical solution without creatively designing, they shall fall within the scope of protection of the present invention.

Claims

1. A prefabricated steel-concrete composite support structure for a foundation pit, characterized by: The invention comprises an H-shaped steel (1) and a connecting assembly (2) assembled and connected to both ends of the H-shaped steel (1); first reinforcing steel bars (12) are fixedly connected to two opposite inner walls of the H-shaped steel (1); a pouring hole (11) for pouring concrete is provided on the H-shaped steel web (16) near the end of the H-shaped steel (1); and a closing assembly (3) for closing the H-shaped steel (1) is also assembled and connected to the top and bottom of the H-shaped steel (1).

2. The prefabricated steel-concrete composite support structure for foundation pits according to claim 1 is characterized in that: The first reinforcing steel bar (12) is in the form of a U-shaped ring, and the ring foot is fixedly connected to the inner wall of the H-shaped steel (1).

3. The prefabricated steel-concrete composite support structure for foundation pits according to claim 2 is characterized in that: The U-shaped rings on the two inner walls of the H-shaped steel (1) are arranged in a staggered manner.

4. The prefabricated steel-concrete composite support structure for foundation pits according to claim 3 is characterized in that: It also includes a second reinforcing steel bar (13) which is fixedly connected to the connecting assembly (2) at both ends after passing through the U-shaped ring transversely, wherein at least one second reinforcing steel bar (13) passes through the U-shaped rings on the two inner walls of the H-shaped steel (1) at the same time.

5. The prefabricated steel-concrete composite support structure for foundation pits according to claim 4 is characterized in that: The H-shaped steels (1) are arranged in a plurality and arranged side by side, and a reinforcement component (4) is connected between two adjacent H-shaped steels (1).

6. The prefabricated steel-concrete composite support structure for foundation pits according to claim 5 is characterized in that: The closing assembly (3) includes a closing plate (31), a connecting block (32) is fixed on the plate surface near the end of the closing plate (31), and a connecting groove (14) is provided on the outer surface of the flange plate (17) near the end of the H-shaped steel (1). The closing plate (31) is arranged in cooperation with the top and bottom of the H-shaped steel (1), and the corresponding connecting block (32) and connecting groove (14) are arranged in cooperation.

7. The prefabricated steel-concrete composite support structure for foundation pits according to any one of claims 1 to 6, characterized in that: The connecting assembly (2) comprises a connecting plate (21) and a shock absorbing assembly, and the two side surfaces of the connecting plate (21) are fixedly connected to the end of the H-shaped steel (1) and the shock absorbing assembly respectively.

8. The prefabricated steel-concrete composite support structure for foundation pits according to claim 7 is characterized in that: The shock absorbing assembly comprises a sliding seat (23) and a damping slider (22) slidably connected to the sliding seat (23), one end of the damping slider (22) away from the sliding seat (23) is connected to the connecting plate (21), and a shock absorbing spring is further provided inside the sliding seat (23), the other end of the shock absorbing spring being fixed to the damping slider (22).

9. The prefabricated steel-concrete composite support structure for foundation pits according to claim 8, characterized in that: One end of the sliding seat (23) away from the damping slider (22) is fixedly connected to a connecting disk (24), the other end of the connecting disk (24) is in contact with the inner wall of the foundation pit, and fixing holes (25) are provided on the four corners of the connecting disk (24).

10. The assembled steel-concrete composite support structure for foundation pits according to claim 9, characterized in that: A plurality of triangular reinforcement ribs (26) are also installed at the connection between the sliding seat (23) and the connecting plate (24).

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