A steel support retaining structure for an extra-large area foundation pit

Abstract

The present invention discloses a steel support and bracing structure for an extra-large area foundation pit, including a bracing structure, and a plurality of protection devices are provided between the plurality of bracing structures. The bracing structure includes a front row of piles, a rear row of piles and a base. The base is arranged close to the front row of piles. The front row of piles and the rear row of piles are symmetrically arranged. Thread grooves are provided on the upper end surfaces of the front row of piles and the rear row of piles. Threaded columns are screwed into both of the two thread grooves. The two threaded columns penetrate through a capping seat together at one end away from the two thread grooves. Fixed screw plates are screwed onto both of the two threaded columns. The two fixed screw plates are arranged away from the two thread grooves. The present invention can conveniently complete the disassembly and assembly work, can be reused by users, greatly reduces the construction cost of users. At the same time, this device can strengthen the connection between the rear tie rod and the ground, thereby improving the stability of the rear pull, and greatly ensuring the safety of the bracing work.

Description

Technical Field

[0001] The present invention relates to the technical field related to foundation pits in civil engineering, and particularly to a steel support retaining structure for an extra-large area foundation pit. Background Technique

[0002] Foundation pit support is a retaining, reinforcement and protection measure for the foundation pit side wall and the surrounding environment to ensure the safety of underground structure construction and the surrounding environment of the foundation pit. Whether to adopt a support structure for foundation pit excavation and what kind of support structure to adopt should be determined through comprehensive economic, technical and environmental analysis and comparison based on the surrounding environment of the foundation pit, the conditions of the underground structure, the depth of foundation pit excavation, engineering geology and hydrogeology conditions, construction conditions, construction season, regional engineering experience, etc.

[0003] A large amount of concrete structures are used for support when setting up the existing foundation pit support. Although the support structure cast by such concrete can complete the support work well, the operation is complex and it cannot be recycled. Moreover, when pulling and fixing the retaining piles, the existing structure simply inserts the rear tie rod into the ground, and there is not enough connection between the rear tie rod and the ground. Therefore, such a fixing structure is not stable, which is extremely disadvantageous to the completion of the support work.

[0004] Therefore, we propose a steel support retaining structure for an extra-large area foundation pit to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art, and propose a steel support retaining structure for an extra-large area foundation pit.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A steel support and bracing structure for an extra-large area foundation pit, comprising a plurality of bracing structures, and a plurality of protection devices are provided between the plurality of bracing structures. The bracing structure includes a front row of piles, a rear row of piles and a base. The base is arranged close to the front row of piles. The front row of piles and the rear row of piles are symmetrically arranged. Thread grooves are provided on the upper end faces of the front row of piles and the rear row of piles. Threaded columns are threadedly connected in both of the two thread grooves. The two threaded columns penetrate through a capping seat together at the ends away from the two thread grooves. Fixed screw discs are threadedly connected to both of the two threaded columns. The two fixed screw discs are arranged away from the two thread grooves. Two symmetrically arranged working ports are provided on the capping seat. The two working ports are respectively arranged close to the front row of piles and the rear row of piles. Swing seats are rotatably connected in both of the two working ports. Threaded ports are provided on the upper end faces of the two swing seats. Circular holes are provided on the inner walls of the two threaded ports. Threaded tubes are threadedly connected in both of the two threaded ports. A front support rod and a rear pull rod are respectively fixedly connected in the two threaded tubes. The front support rod and the rear pull rod respectively penetrate through the two circular holes. The front support rod is arranged close to the front row of piles. The rear pull rod is arranged close to the rear row of piles. A through hole is provided on the base. The front support rod penetrates through the through hole. A fixing device is provided on the rear pull rod.

[0008] Preferably, the fixing device includes a threaded hole provided on the upper end face of the rear pull rod. A threaded rod is threadedly connected in the threaded hole. A conical head is fixedly connected to the lower end face of the threaded rod. A fixing groove is provided on the inner wall of the threaded hole close to the conical head. A plurality of equally spaced embedding structures are provided on the inner wall of the fixing groove. The embedding structure includes an embedding port provided on the inner wall of the fixing groove. An embedding block is slidably connected in the embedding port. A reset disc is fixedly connected to the outer wall of the embedding block at the end away from the embedding port. The reset disc and the inner wall of the fixing groove are connected by a plurality of reset springs.

[0009] Preferably, threaded holes are provided on the side walls of the two working ports away from each other. The two threaded holes are both arranged away from the base. Threaded bars are threadedly connected in both of the two threaded holes. The two threaded bars are rotatably connected to a semi-circular bar at the ends close to each other. The two semi-circular bars are respectively slidably connected in the two working ports.

[0010] Preferably, the protection device includes a protection plate arranged between the two front rows of piles. A plurality of fixing seats are provided on the side walls of the two front rows of piles. Fixing ports are provided on the side walls of the plurality of fixing seats away from the front row of piles. The protection plate is slidably connected in the plurality of fixing ports. A plurality of limiting holes are provided on the protection plate. Limiting columns are slidably connected in the plurality of limiting holes. A fitting plate is fixedly connected to one ends of the plurality of limiting columns together. A plurality of threaded seats are rotatably connected to the side wall of the fitting plate close to the protection plate. The plurality of threaded seats penetrate through the protection plate at the ends away from the fitting plate by threads.

[0011] Preferably, square grooves are provided on the upper end faces of the front strut and the rear tie rod, and handles are slidably connected in the two square grooves, and the two handles are both L-shaped.

[0012] Preferably, rotating grooves are provided on two opposite inner walls of each working port, and rotating seats are rotatably connected in the two rotating grooves, and the two rotating seats are fixedly arranged on the swing seat together.

[0013] Preferably, a spherical ball is slidably connected to the front strut, and a plurality of threaded positioning holes are provided on the side wall of the spherical ball, and fixing bolts are threadedly connected in the plurality of threaded positioning holes.

[0014] Preferably, a plurality of threaded fixing holes are provided on the base, and fixing screws are threadedly connected in the plurality of threaded fixing holes.

[0015] Preferably, a plurality of semi-circular openings are provided on one side wall of the base, and the plurality of front row piles are respectively arranged in the plurality of semi-circular openings.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, the user can install the front row piles, the rear row piles, the base, the protection plate and the fitting plate made of steel structure in the ground and the foundation pit, and then use the protection plate and the fitting plate for protection, so as to effectively replace the concrete structure to complete the support work. At the same time, such a setting facilitates the user's operation, and each part structure can also be conveniently disassembled, which greatly facilitates the user's repeated use, reduces the user's work cost. At the same time, the user can use the threaded rod and other structures in the rear tie rod to push the embedding block, so that the embedding block can extend out of the embedding port when the rear tie rod is inserted into the ground, so that the connection between the rear tie rod and the ground can be strengthened by using the embedding block, making the rear pulling work more stable, and then making the entire support work more stable. Description of the Drawings

[0018] Figure 1 is a side structural cross-sectional view of a steel support and retaining structure for an extra-large area foundation pit proposed by the present invention;

[0019] Figure 2 is Figure 1 an enlarged view of structure A in

[0020] Figure 3 is Figure 1 an enlarged view of structure B in

[0021] Figure 4 is a partial top structural cross-sectional view of the protection device of a steel support and retaining structure for an extra-large area foundation pit proposed by the present invention;

[0022] Figure 5 The sectional view of the top view of the semi-circular opening part of a steel support and retaining structure for an extra-large foundation pit proposed by the present invention;

[0023] Figure 6 The sectional view of the top view of the working opening part of a steel support and retaining structure for an extra-large foundation pit proposed by the present invention;

[0024] Figure 7 The sectional view of the top view of the spherical part of a steel support and retaining structure for an extra-large foundation pit proposed by the present invention.

[0025] In the figure: 1 front row of piles, 2 rear row of piles, 3 base, 4 threaded groove, 5 threaded post, 6 coping seat, 7 fixed screw plate, 8 working opening, 9 swing seat, 10 threaded opening, 11 round hole, 12 threaded pipe, 13 front strut, 14 rear tie rod, 15 through opening, 16 threaded hole, 17 threaded rod, 18 conical head, 19 fixed groove, 20 embedding opening, 21 embedding block, 22 reset plate, 23 reset spring, 24 threaded hole, 25 threaded strip, 26 semi-circular strip, 27 protection plate, 28 fixed seat, 29 fixed opening, 30 limit hole, 31 limit post, 32 fitting plate, 33 threaded seat, 34 square groove, 35 handle, 36 rotation groove, 37 rotation seat, 38 spherical ball, 39 threaded positioning hole, 40 fixing bolt, 41 threaded fixing hole, 42 fixing screw, 43 semi-circular opening. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0027] Refer to Figures 1-7, A steel support retaining structure for an extra-large area foundation pit, comprising a plurality of support structures, and a plurality of protection devices are provided between the plurality of support structures. The support structure includes a front row of piles 1, a rear row of piles 2 and a base 3. The front row of piles 1, the rear row of piles 2 and the base 3 are all made of steel structures. During installation, the front row of piles 1 is inserted into the ground inside the foundation pit and fits against the side wall of the foundation pit, the rear row of piles 2 is inserted into the ground outside the foundation pit, and the base 3 is installed in the ground inside the foundation pit. In this way, with the protection device made of steel structure, the retaining work can be smoothly completed without the need to pour concrete, greatly improving the work efficiency. At the same time, it can be disassembled and reused, greatly reducing the construction cost of users. A plurality of semi-circular openings 43 are provided on one side wall of the base 3, and a plurality of front row of piles 1 are respectively arranged inside the plurality of semi-circular openings 43. The setting of the semi-circular openings 43 enables the front row of piles 1 and the base 3 to fit more closely during installation, thereby making the retaining work more stable. A plurality of threaded fixing holes 41 are provided on the base 3, and fixing screws 42 are threadedly connected inside the plurality of threaded fixing holes 41. In this way, the installation and fixation of the base 3 on the ground can be smoothly completed by inserting the fixing screws 42 into the ground and the threaded connection between the fixing screws 42 and the threaded fixing holes 41. The protection device includes a protection plate 27 arranged between two front row of piles 1. A plurality of fixing seats 28 are provided on the side walls of the two front row of piles 1, and fixing openings 29 are provided on the side walls of the plurality of fixing seats 28 away from the front row of piles 1. The protection plate 27 is slidably connected inside the plurality of fixing openings 29. In this way, the installation and fixation of the protection plate 27 can be completed by means of the front row of piles 1;

[0028] The protection board 27 is provided with a plurality of limit holes 30. Limit posts 31 are slidably connected in the plurality of limit holes 30. One ends of the plurality of limit posts 31 are fixedly connected together with a fitting plate 32. A plurality of threaded seats 33 are rotatably connected to a side wall of the fitting plate 32 close to the protection board 27. One ends of the plurality of threaded seats 33 away from the fitting plate 32 are all threadedly penetrated through the protection board 27. In this way, the position of the fitting plate 32 can be conveniently adjusted, and then the fitting plate 32 can better fit to the inner wall of the foundation pit, and then the support work can be better completed. The base 3 is arranged close to the front row of piles 1. The front row of piles 1 and the rear row of piles 2 are symmetrically arranged. Threaded grooves 4 are provided on the upper end faces of the front row of piles 1 and the rear row of piles 2. Threaded posts 5 are threadedly connected in the two threaded grooves 4. One ends of the two threaded posts 5 away from the two threaded grooves 4 are jointly penetrated through a capping seat 6. Fixed screw disks 7 are threadedly connected to the two threaded posts 5. The two fixed screw disks 7 are arranged away from the two threaded grooves 4. Two working ports 8 arranged symmetrically are provided on the capping seat 6. The two working ports 8 are respectively arranged close to the front row of piles 1 and the rear row of piles 2. Swing seats 9 are rotatably connected in the two working ports 8. Rotating grooves 36 are provided on two opposite inner walls of each working port 8. Rotating seats 37 are rotatably connected in the two rotating grooves 36. The two rotating seats 37 are jointly fixed on the swing seat 9. In this way, the swing seat 9 can smoothly rotate and swing in the working port 8, and then the angle adjustment work of the front strut 13 and the rear pull rod 14 can be smoothly completed;

[0029] On the side walls of the two working ports 8 that are far away from each other, there are threaded holes 24. Both of the two threaded holes 24 are set far away from the base 3. Threaded bars 25 are threadedly connected in both of the two threaded holes 24. At one end of the two threaded bars 25 that are close to each other, there are semi-circular bars 26 rotatably connected. The two semi-circular bars 26 are respectively slidably connected in the two working ports 8. In this way, the semi-circular bars 26 can be pushed by the threaded bars 25 to restrict the swing seat 9, and then the swing seat 9 can stay stably in the inclined state to cooperate with the installation work. On the upper end surfaces of the two swing seats 9, there are threaded ports 10. On the inner walls of the two threaded ports 10, there are round holes 11. Threaded tubes 12 are threadedly connected in the two threaded ports 10. A front strut 13 and a rear pull rod 14 are respectively fixedly connected in the two threaded tubes 12. On the upper end surfaces of the front strut 13 and the rear pull rod 14, there are square grooves 34. Handles 35 are slidably connected in the two square grooves 34. The two handles 35 are both L-shaped. The front strut 13 and the rear pull rod 14 respectively penetrate through the two round holes 11. This setting enables the front strut 13 and the rear pull rod 14 to freely slide and rotate in the round holes 11, and then the front strut 13 and the rear pull rod 14 do not affect the threaded connection between the threaded tube 12 and the threaded port 10. At the same time, with the support of the round holes 11, it also avoids the front strut 13 and the rear pull rod 14 from wearing the threaded port 10 during sliding, greatly ensuring the safety of the device operation. The front strut 13 is close to the front row of piles 1, and the rear pull rod 14 is close to the rear row of piles 2. There is a through port 15 on the base 3. The front strut 13 penetrates through the through port 15. A spherical ball 38 is slidably connected on the front strut 13. On the side wall of the spherical ball 38, there are a plurality of threaded positioning holes 39. Fixing bolts 40 are threadedly connected in the plurality of threaded positioning holes 39. In this way, the spherical ball 38 can be conveniently fixed at a specified position on the front strut 13, and then the spherical ball 38 can be attached to the base 3. In this way, the base 3 can use the spherical ball 38 and the fixing bolt 40 to assist in supporting the front strut 13, and then the support work is more stable;

[0030] A fixing device is provided on the rear tie rod 14. The fixing device includes a threaded hole 16 provided on the upper end face of the rear tie rod 14. A threaded rod 17 is threadedly connected in the threaded hole 16. A tapered head 18 is fixedly connected to the lower end face of the threaded rod 17. The tapered head 18 is provided to better push the embedding block 21, so that the embedding block 21 can be smoothly inserted into the ground, completing the auxiliary fixed connection between the rear tie rod 14 and the ground, making the support work more stable. On the inner wall of one end of the threaded hole 16 close to the tapered head 18, there is a fixing groove 19. On the inner wall of the fixing groove 19, there are a plurality of embedding structures arranged at equal intervals. The embedding structure includes an embedding port 20 provided on the inner wall of the fixing groove 19. An embedding block 21 is slidably connected in the embedding port 20. A reset disk 22 is fixedly connected to the outer wall of one end of the embedding block 21 away from the embedding port 20. The reset disk 22 and the inner wall of the fixing groove 19 are connected by a plurality of reset springs 23. In this way, with the elastic force of the reset springs 23, the reset work of the embedding block 21 can be completed, and preferably, the embedding block 21 can be prevented from continuing to be inserted into the ground during the disassembly work, affecting the disassembly work of the rear tie rod 14.

[0031] During the use of the present invention, first, the front row of piles 1 is inserted into the ground in the foundation pit and close to the inner wall of the foundation pit, and the rear row of piles 2 is inserted into the ground outside the foundation pit. At the same time, the base 3 is placed in the foundation pit ground. With the threaded connection of the fixing screw 42 and the threaded fixing hole 41, the fixing screw 42 is inserted into the ground to complete the installation and fixation of the base 3 in the foundation pit. Subsequently, with the sliding of the plurality of protection plates 27 in the plurality of fixing ports 29, the plurality of protection plates 27 are fixed between two adjacent front row of piles 1. Subsequently, a plurality of threaded columns 5 are respectively threadedly connected in the corresponding threaded grooves 4, and the capping seat 6 is placed through the threaded columns 5 on the front row of piles 1 and the rear row of piles 2. Then, a plurality of fixing disks 7 are rotated, so that the fixing disks 7 abut against the capping seat 6 while rotating on the threaded columns 5. In this way, the fixed connection work between the capping seat 6 and the front row of piles 1 and the rear row of piles 2 is successfully completed. Subsequently, according to the installation inclination angles of the front strut 13 and the rear tie rod 14, the threaded bar 25 in the threaded hole 24 is rotated. Due to the threaded connection between the threaded hole 24 and the threaded bar 25, the threaded bar 25 can push the semi-circular bar 26 to slide in the working port 8 during the rotation process, and then smoothly push the swing seat 9 to tilt to a suitable position;

[0032] Subsequently, the user can insert the front strut 13 and the rear tie rod 14 into the two circular holes 11 respectively, and make the front strut 13 close to the front row of piles 1 and align with the ground inside the foundation pit, and the rear tie rod 14 close to the rear row of piles 2 and align with the ground outside the foundation pit. Then, rotate and push the front strut 13 and the rear tie rod 14, and make the front strut 13 penetrate through the through hole 15 on the base 3 and then insert it into the ground inside the foundation pit, and the rear tie rod 14 is inserted into the ground outside the foundation pit. Subsequently, through the sliding connection between the handle 35 and the square groove 34, rotate the handle 35 to drive the front strut 13 and the rear tie rod 14 to rotate. In this way, the two threaded pipes 12 fixedly connected to the front strut 13 and the rear tie rod 14 respectively can be threadedly connected to the threaded ports 10, and then the connection work between the front strut 13, the rear tie rod 14 and the coping seat 6 is successfully completed. Then, the threaded rod 17 can be rotated. As the threaded rod 17 rotates in the threaded hole 16, the threaded rod 17 can push the tapered head 18 to descend and insert into the fixing groove 19. The descending tapered head 18 can push a plurality of embedded blocks 21, so that the embedded blocks 21 can drive the reset disc 22 to overcome the elastic force of the reset spring 23 and extend out of the embedding port 20 and insert into the ground. In this way, the rear tie rod 14 can strengthen the fixing relationship with the ground by means of the arrangement of the embedded blocks 21, and then make the rear pulling work more stable and the support work safer;

[0033] If disassembly is required, only rotate the threaded rod 17 in the reverse direction to drive the tapered head 18 to rise. The embedded blocks 21 and the reset disc 22 that lose the supporting force will reset under the elastic force of the reset spring 23. Then, the user can conveniently complete the disassembly work of the rear tie rod 14. Subsequently, the user can rotate a plurality of threaded seats 33, and then push a plurality of fitting plates 32 away from the protection plate 27 and fit them to the inner wall of the foundation pit, and then successfully complete the support work. If disassembly is required, just perform the rising operation in the reverse direction. In this way, the user can conveniently complete the support work with this device and can disassemble it for repeated use, greatly reducing the construction cost of the user.

[0034] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A steel support and retaining structure for an extra-large area foundation pit, comprising a plurality of support structures, and a plurality of protection devices are provided between the plurality of support structures, characterized in that, The support structure includes a front row of piles (1), a rear row of piles (2) and a base (3). The base (3) is arranged close to the front row of piles (1). The front row of piles (1) and the rear row of piles (2) are symmetrically arranged. Thread grooves (4) are provided on the upper end surfaces of the front row of piles (1) and the rear row of piles (2). Threaded columns (5) are threadedly connected in the two thread grooves (4). The ends of the two threaded columns (5) away from the two thread grooves (4) jointly penetrate through a capping seat (6). Fixed disks (7) are threadedly connected to the two threaded columns (5). The two fixed disks (7) are arranged away from the two thread grooves (4). Two symmetrically arranged working ports (8) are provided on the capping seat (6). The two working ports (8) are respectively arranged close to the front row of piles (1) and the rear row of piles (2). Swing seats (9) are rotatably connected in the two working ports (8). Threaded ports (10) are provided on the upper end surfaces of the two swing seats (9). Circular holes (11) are provided on the inner walls of the two threaded ports (10). Threaded tubes (12) are threadedly connected in the two threaded ports (10). A front strut (13) and a rear pull rod (14) are respectively fixedly connected in the two threaded tubes (12). The front strut (13) and the rear pull rod (14) respectively penetrate through the two circular holes (11). The front strut (13) is arranged close to the front row of piles (1). The rear pull rod (14) is arranged close to the rear row of piles (2). A through hole (15) is provided on the base (3). The front strut (13) penetrates through the through hole (15). A fixing device is provided on the rear pull rod (14); Threaded holes (24) are provided on the side walls of the two working ports (8) away from each other. The two threaded holes (24) are arranged away from the base (3). Threaded bars (25) are threadedly connected in the two threaded holes (24). Semi-circular bars (26) are rotatably connected to the ends of the two threaded bars (25) close to each other. The two semi-circular bars (26) are respectively slidably connected in the two working ports (8); The protection device includes a protection plate (27) arranged between the two front rows of piles (1). A plurality of fixing seats (28) are provided on the side walls of the two front rows of piles (1). Fixing ports (29) are provided on the side walls of the plurality of fixing seats (28) away from the front row of piles (1). The protection plate (27) is slidably connected in the plurality of fixing ports (29). A plurality of limiting holes (30) are provided on the protection plate (27). Limiting columns (31) are slidably connected in the plurality of limiting holes (30). A fitting plate (32) is fixedly connected to one ends of the plurality of limiting columns (31). A plurality of threaded seats (33) are rotatably connected to the side wall of the fitting plate (32) close to the protection plate (27). The ends of the plurality of threaded seats (33) away from the fitting plate (32) threadedly penetrate through the protection plate (27); Square grooves (34) are provided on the upper end faces of the front strut (13) and the rear tie rod (14). Handles (35) are slidably connected in the two square grooves (34), and the two handles (35) are both L-shaped.

2. The steel support and retaining structure for an extra-large area foundation pit according to claim 1, characterized in that, The fixing device includes a threaded hole (16) provided on the upper end face of the rear tie rod (14). A threaded rod (17) is threadedly connected in the threaded hole (16). A tapered head (18) is fixedly connected to the lower end face of the threaded rod (17). A fixing groove (19) is provided on the inner wall of the threaded hole (16) near the tapered head (18). A plurality of embedding structures arranged at equal intervals are provided on the inner wall of the fixing groove (19). The embedding structure includes an embedding port (20) provided on the inner wall of the fixing groove (19). An embedding block (21) is slidably connected in the embedding port (20). A reset disc (22) is fixedly connected to the outer wall of the embedding block (21) away from the embedding port (20). The reset disc (22) and the inner wall of the fixing groove (19) are connected by a plurality of reset springs (23).

3. The steel support and retaining structure for an extra-large area foundation pit according to claim 1, characterized in that Rotating grooves (36) are provided on the two opposite inner walls of each working port (8). Rotating seats (37) are rotatably connected in the two rotating grooves (36), and the two rotating seats (37) are jointly fixed on the swing seat (9).

4. A steel support and retaining structure for an extra-large area foundation pit according to claim 1, characterized in that, A spherical ball (38) is slidably connected to the front strut (13). A plurality of threaded positioning holes (39) are provided on the side wall of the spherical ball (38). Fixing bolts (40) are threadedly connected in the plurality of threaded positioning holes (39).

5. A steel support and bracing structure for an extra-large area foundation pit according to claim 1, characterized in that, A plurality of threaded fixing holes (41) are provided on the base (3). Fixing screws (42) are threadedly connected in the plurality of threaded fixing holes (41).

6. The steel support and retaining structure for an extra-large area foundation pit according to claim 1, characterized in that, A plurality of semi-circular openings (43) are provided on one side wall of the base (3). The plurality of front row piles (1) are respectively located in the plurality of semi-circular openings (43).

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