A quick diagonal bracing equipment for assembly type foundation pit construction

Abstract

The application discloses an assembled foundation pit construction rapid inclined support equipment and belongs to the technical field of foundation pit support, which comprises a wall pre-embedded part pre-embedded in a foundation pit retaining wall, a main pit pre-embedded part and a secondary pit pre-embedded part pre-embedded in a foundation pit bottom, and an inclined support unit assembled on the wall pre-embedded part and the main pit pre-embedded part. The pre-embedded part and the inclined support unit are arranged, the rapid plug-in cooperation is realized, the traditional welding and the multi-bolt fastening mode are abandoned, the butt joint of the inclined support unit and the pre-embedded part does not need complicated calibration, the operation is simple and fast, the installation period is greatly shortened, and the requirement of "rapid support" of the foundation pit construction is met. Meanwhile, the energy storage assembly in the telescopic part can realize length self-adaptive compensation. When the axial force decreases or the length deviation is caused by the creep of the foundation pit soil body, the first spring releases the energy storage to drive the secondary rod to move, the deviation is automatically compensated and pressure is automatically compensated, and the support loosening is avoided.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology, and in particular to a prefabricated foundation pit construction rapid inclined support device. Background Technology

[0002] During the construction of foundation pits in building engineering, in order to ensure the stability of the pit sidewalls and prevent collapse and damage to the surrounding environment, it is necessary to support the retaining walls and bottom of the pit using inclined support equipment. As the core component of the temporary support system for foundation pits, the installation efficiency, support stability and dynamic adaptability of inclined supports directly affect the safety and progress of foundation pit construction.

[0003] The inclined support equipment currently used in foundation pit construction has many technical drawbacks, making it difficult to meet the "efficient, safe, and flexible" construction requirements of modern foundation pit engineering: First, the installation process is cumbersome. Traditional inclined supports mostly use welding or multiple sets of high-strength bolts for connection, requiring professional welders and skilled technicians. The installation of a single support is time-consuming, and repeated calibration and positioning are required during the installation process, which seriously restricts the construction progress of foundation pit excavation. Second, the dynamic load adaptability is poor. During foundation pit construction, soft soil is prone to creep, and construction disturbances around the foundation pit or changes in groundwater level can easily cause soil settlement, resulting in dynamic changes in the lateral earth pressure borne by the inclined support. However, existing inclined supports are mostly rigid fixed structures, lacking effective axial force compensation and length adaptive adjustment mechanisms. When the axial force decreases or length deviation occurs, problems such as support loosening and eccentric compression can easily occur, leading to excessive deformation of the foundation pit sidewalls and even safety accidents. At the same time, rigid structures are difficult to buffer impact loads and are prone to fatigue damage or failure of support components due to sudden changes in instantaneous loads. Summary of the Invention

[0004] The purpose of this invention is to address the problems of traditional inclined supports, which mostly use welding or multiple sets of high-strength bolts for connection, requiring professional welders and skilled technicians, and the long installation time for a single support, as well as the need for repeated calibration and positioning during installation, which seriously restricts the construction progress of foundation pit excavation. Therefore, this invention proposes a prefabricated rapid inclined support device for foundation pit construction.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A prefabricated rapid inclined support device for foundation pit construction includes an embedded part in the retaining wall of the foundation pit, a main embedded part and a secondary embedded part in the bottom of the foundation pit, and an inclined support unit is assembled on the embedded part in the wall and the main embedded part in the pit. The inclined support unit includes a telescopic component, and both ends of the telescopic component are equipped with ball joint assemblies. The telescopic component is quickly connected to the embedded parts in the wall and the main embedded parts in the pit via a positioning plate mounted on the ball joint assembly. The ball joint assembly includes a ball joint seat and a ball head rotatably connected within the ball joint seat. The ball head achieves axial force compensation via a limiting seat assembled around the ball joint seat.

[0006] As a further description of the above technical solution: The telescopic component includes a main rod, a secondary rod inserted into the main rod, and an energy storage component also installed inside the main rod.

[0007] As a further description of the above technical solution: The energy storage component includes a positioning seat assembled inside the main rod. One end of the positioning seat is connected to a contact seat through a slot. A first spring is installed on one side wall of the contact seat, and one end of the first spring is connected to the positioning seat.

[0008] As a further description of the above technical solution: The top of the limiting seat is fitted with a second spring through an opening in the mounting hole, and the top of the second spring is fixed with a guide post that is inserted into the inner bottom wall of the ball joint seat. An adjusting bolt is threaded onto the outer wall of the ball joint seat and rotatably connected to the top of the guide post.

[0009] As a further description of the above technical solution: The wall-embedded component has a contact plate fixed on its front side, and an upper socket is installed on the front side of the contact plate. The ball joint seat located above is inserted into the upper socket through a positioning plate, and one end of the upper socket is rotatably connected to a fixed seat. The fixed seat is connected to the positioning plate through a pin.

[0010] As a further description of the above technical solution: The top of both the main embedded part and the secondary embedded part in the pit are fixed with a lower socket, and the ball joint seat located below is inserted into one of the lower sockets through a positioning plate.

[0011] As a further description of the above technical solution: The auxiliary support is mounted on the secondary rod. The auxiliary support includes a sleeve rod, into which a support rod is inserted. One end of the support rod is rotatably connected to a mounting frame, and the mounting frame is mounted on the secondary rod by fastening bolts. The bottom end of the sleeve rod is rotatably connected to a plug plate that is compatible with the lower socket.

[0012] As a further description of the above technical solution: A third spring is fitted on the inner bottom wall of the sleeve rod, and an abutment seat is installed at one end of the third spring.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: By setting up embedded parts and inclined support units, the traditional welding and multiple bolt fastening methods are eliminated through quick plug-in connection. Furthermore, the docking between the inclined support unit and the embedded parts does not require complex calibration, making the operation simple and quick, greatly shortening the installation period and meeting the "rapid support" requirements of foundation pit construction. Meanwhile, the energy storage component inside the expansion joint can achieve length adaptive compensation. When the creep of the foundation pit soil causes the axial force to decrease or the length to deviate, the first spring releases the stored energy to drive the auxiliary rod to move, automatically replenish the pressure and compensate for the deviation, and avoid the support from loosening. The ball joint component can not only achieve flexible angle adjustment to adapt to construction deviations, but also achieve angle fixation through the preload of the second spring, allowing for small angle compensation under dynamic loads and preventing the joint from loosening. Attached Figure Description

[0014] Figure 1 A schematic diagram of the planar state after installation is shown according to an embodiment of the present invention; Figure 2 A schematic diagram showing the state of the fixing base after it has been opened, according to an embodiment of the present invention, is shown. Figure 3 A schematic diagram of the structure of an energy storage component provided according to an embodiment of the present invention is shown; Figure 4 The present invention provides an embodiment of the invention. Figure 2 Enlarged view of point A in the middle; Figure 5 A schematic diagram showing the position of the telescopic component after installation according to an embodiment of the present invention is shown; Figure 6 A schematic diagram of the structure of the auxiliary support member provided according to an embodiment of the present invention is shown; Figure 7 A three-dimensional schematic diagram of the installed state provided according to an embodiment of the present invention is shown; Figure 8 A schematic diagram of the overall structure provided according to an embodiment of the present invention is shown; Figure 9 A schematic diagram of the structure of the telescopic member provided according to an embodiment of the present invention is shown.

[0015] Legend: 10. Embedded parts in the wall; 11. Main embedded parts in the pit; 12. Secondary embedded parts in the pit; 13. Contact plate; 14. Upper socket; 15. Fixing base; 16. Lower socket; 20. Diagonal support unit; 21. Telescopic component; 211. Main rod; 212. Secondary rod; 213. Positioning seat; 214. Contact seat; 215. First spring; 22. Ball joint assembly; 221. Ball joint seat; 222. Ball head; 223. Limiting seat; 224. Second spring; 225. Guide post; 226. Adjusting bolt; 23. Positioning plate; 30. Auxiliary support component; 31. Sleeve rod; 32. Support rod; 33. Mounting frame; 34. Insert plate; 35. Abutment seat; 36. Third spring. Detailed Implementation

[0016] 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0017] like Figure 1 - Figure 9 As shown, the present invention provides: A prefabricated foundation pit construction rapid inclined support device includes a wall embedded part 10 embedded in the foundation pit retaining wall and a pit main embedded part 11 and a pit secondary embedded part 12 embedded in the bottom of the foundation pit. Inclined support unit 20 is assembled on the wall embedded part 10 and the pit main embedded part 11. The inclined support unit 20 includes a telescopic component 21, and both ends of the telescopic component 21 are equipped with ball joint assemblies 22. The telescopic component 21 is quickly connected to the wall embedded part 10 and the pit main embedded part 11 via the positioning plate 23 mounted on the ball joint assembly 22. The telescopic component 21 includes a main rod 211, and a secondary rod 212 is inserted into the main rod 211; The front of the wall-embedded part 10 is fixed with a contact plate 13, and the front of the contact plate 13 is equipped with an upper socket 14. The ball joint seat 221 located above is inserted into the upper socket 14 through the positioning plate 23, and one end of the upper socket 14 is rotatably connected to a fixing seat 15. The fixing seat 15 is connected to the positioning plate 23 through a pin. Specifically, the bottom of the positioning plate 23 inserted into the upper socket 14 is at a right angle. In order to facilitate the rotation of the fixing seat 15 to fit against the upper socket 14 and be fitted onto the surface of the positioning plate 23, the top of the positioning plate 23 is semi-circular. At the same time, this part of the area has a corresponding insertion hole for the pin. After the positioning plate 23 is inserted into the upper socket 14 and the fixing seat 15 is fitted onto the surface of the positioning plate 23, the pin is inserted into the insertion hole. At this time, the positioning plate 23 is fixed in the upper socket 14 (since the fixing seat 15 can only rotate and the inserted positioning plate 23 can only move up and down, the position of the positioning plate 23 can be fixed when the pin is inserted and the plate moves). In particular, the pin can also be replaced with a bolt, and the insertion hole must be changed to a threaded hole at the same time. The bolt provides a better fixing effect than the pin, but the installation is faster when using the pin.

[0018] like Figure 1 , Figure 2, Figure 4 and Figure 9 As shown, the ball joint assembly 22 includes a ball joint seat 221 and a ball head 222 rotatably connected within the ball joint seat 221. The ball head 222 achieves axial force compensation via a limiting seat 223 mounted on the periphery of the ball joint seat 221. Specifically, the positioning plate 23 is connected to the ball joint seat 221. It should be noted that the top end of the main rod 211 is connected to the ball head 222 in the upper ball joint assembly 22, while the bottom end of the secondary rod 212 is connected to the ball head 222 in the lower ball joint assembly 22. The top of the limiting seat 223 is fitted with a second spring 224 through an opening in the mounting hole, and the top of the second spring 224 is fixed with a guide post 225 that is inserted into the bottom wall of the ball joint seat 221. An adjusting bolt 226 is threaded on the outer wall of the ball joint seat 221 and rotatably connected to the top of the guide post 225. Specifically, after the main rod 211 and the auxiliary rod 212 are installed, the angle between the ball joint seat 221 and the ball head 222 is already positioned. At this time, by adjusting the bolt 226, the guide column 225 is driven to move downwards until the second spring 224 and the limiting seat 223 move downwards until the seat body and the ball head 222 are abutted. In this state, by continuing to rotate the adjusting bolt 226, the guide column 225 can be driven to continue to move downwards to drive the second spring 224 to gradually compress, thereby increasing the preload and achieving automatic positioning after subsequent angle adjustment, avoiding loosening of the joint, and allowing small angle compensation under dynamic loads. Both the main embedded part 11 and the secondary embedded part 12 in the pit are fixed with lower sockets 16 at their tops. The ball joint seat 221 located below is inserted into one of the lower sockets 16 via a positioning plate 23. In particular, the pre-embedding and insertion method makes the installation of the expansion joint 21 faster. It should be noted that the socket is integrated with the embedded part and does not require temporary on-site fixing. like Figure 3 and Figure 9 As shown, an energy storage component is also installed inside the main rod 211; The energy storage component includes a positioning seat 213 assembled inside the main rod 211. One end of the positioning seat 213 is connected to a contact seat 214 through a slot. A first spring 215 is installed on one side wall of the contact seat 214, and one end of the first spring 215 is connected to the positioning seat 213. In particular, a positioning screw hole is provided on the outer wall of the positioning seat 213, and a plurality of mounting screw holes arranged in a linear array and adapted to the positioning screw hole are provided on the outer wall of the main rod 211. A positioning bolt is threadedly connected to one of the mounting screw holes and the positioning screw hole. The positioning bolt can fix the positioning seat 213 inside the main rod 211. Preferably, a positioning nut is threaded on one end of the positioning bolt that passes through the main rod 211, which can enhance the fixing effect of the positioning seat 213. The surface of the positioning seat 213 is provided with an upper set screw hole, and the surface of the contact seat 214 is provided with a lower set screw hole corresponding to the upper set screw hole. The upper and lower set screw holes are connected to a set bolt by a common thread. In particular, the upper surface of the main rod 211 is provided with a long groove corresponding to the set bolt. The setting of the long groove allows the positioning seat 213 to slide downward without restriction. During the sliding process, the set bolt will move into the long groove. In this state, the first spring 215 is in the maximum compression state. Specifically, during actual installation, the main rod 211 is first inserted into the embedded part 10 in the wall via the positioning plate 23. Then, the secondary rod 212 is inserted into the main embedded part 11 in the pit via the positioning plate 23 connected to it. At this time, the positioning bolts are loosened to release the fixation of the positioning seat 213. Under its own weight, the positioning seat 213 slides downward until the contact seat 214 contacts the end of the secondary rod 212 inside the main rod 211. In this state, the positioning bolts are tightened to re-fix the positioning seat 213 inside the main rod 211. Then, the set bolts are loosened to release the contact seat 214 from the main rod 211. The connection between the positioning seats 213 is such that, in this state, the contact seat 214 is kept in real time against the auxiliary rod 212 under the action of the first spring 215. In this state, the auxiliary rod 212, together with the main rod 211, can play a stable supporting role. At the same time, when the soil in the foundation pit creeps, the first spring 215 releases the stored energy, driving the auxiliary rod 212 to move and automatically compensate for the length deviation. The flexible section formed by the energy storage component can release the stored energy to compensate for the pressure when the axial force decreases due to soil creep. At the same time, it can avoid impact loads and realize flexible buffering under dynamic loads. Meanwhile, the rigid section ensures the overall bearing capacity.

[0019] like Figure 1 , Figure 6 , Figure 7 and Figure 8 As shown, an auxiliary support 30 is mounted on the secondary rod 212. The auxiliary support 30 includes a sleeve rod 31, a support rod 32 is inserted into the sleeve rod 31, one end of the support rod 32 is rotatably connected to a mounting frame 33, and the mounting frame 33 is mounted on the secondary rod 212 by fastening bolts. The bottom end of the sleeve rod 31 is rotatably connected to a plug plate 34 that is compatible with the lower socket 16. Preferably, a positioning stud is threaded through the surface of the lower socket 16 to provide auxiliary fixation after the positioning plate 23 and the plug plate 34 are respectively inserted into the two lower sockets 16. A third spring 36 is mounted on the inner bottom wall of the sleeve rod 31. Specifically, rubber pads are provided at both ends of the first spring 215, the second spring 224, and the third spring 36, and an abutment seat 35 is installed at one end of the third spring 36. Preferably, a mounting bolt is threaded through the outer wall of the sleeve rod 31. In the initial state, the abutment seat 35 is fixed inside the sleeve rod 31 by the mounting bolt. When the sleeve rod 31 is inserted into the lower socket 16 at the top of the secondary embedded part 12 in the pit through the insertion plate 34, and the support rod 32 is sleeved on the secondary rod 2 through the mounting frame 33... After the surface is 12, unscrew the mounting bolts to release the restriction on the abutment seat 35. At this time, the abutment seat 35 will abut against the end of the support rod 32 under the action of the third spring 36. Then, with the cooperation of the sleeve rod 31 and the support rod 32, it will provide auxiliary support for the secondary rod 212, improve its support capacity and stability. The third spring 36 of the auxiliary support component 30 and the abutment seat 35 form a flexible buffer, which, together with the rigid support of the sleeve rod 31 and the support rod 32, further enhances the overall impact resistance, avoids rigid failure, and adapts to dynamic load changes.

[0020] Specifically, this prefabricated foundation pit construction rapid inclined support equipment operates / is used as follows: 1. Pre-embedding stage: The wall-embedded part 10 is pre-embedded in the retaining wall of the foundation pit, and the main pre-embedded part 11 and the secondary pre-embedded part 12 are pre-embedded in the bottom of the foundation pit. After pre-embedding, the socket on the end face of the pre-embedded part will be exposed to the outside. 2. Installation of diagonal bracing: Insert the main rod 211 into the upper socket 14 of the wall-embedded part 10 through the positioning plate 23, and rotate the fixing seat 15 to connect the positioning plate 23 and fix it with pins / bolts; Insert the auxiliary rod 212 into the lower socket 16 of the main embedded part 11 in the pit through the positioning plate 23, and fix it with the positioning stud. 3. Energy storage component activation: Loosen the positioning bolt to allow the positioning seat 213 to slide down to the contact seat 214 to abut against the auxiliary rod 212. After tightening the positioning bolt to fix it, unscrew the set bolt to keep the first spring 215 in a real-time abutting state, thereby realizing axial force compensation. 4. Pre-tightening of ball joint assembly 22: Rotate the adjusting bolt 226 to compress the second spring 224, so that the limiting seat 223 presses against the ball head 222, thus completing the angle positioning and pre-tightening; 5. Auxiliary support installation: The support rod 32 is sleeved onto the auxiliary rod 212 through the mounting frame 33. The insert plate 34 at the bottom of the sleeve rod 31 is inserted into the lower socket 16 of the secondary embedded part 12 in the pit. The mounting bolt is unscrewed so that the third spring 36 drives the abutment seat 35 to abut against the support rod 32, forming an auxiliary support. 6. Dynamic adjustment: When the soil in the foundation pit creeps, the first spring 215 releases its stored energy to push the auxiliary rod 212 to move and compensate for the length deviation; under impact load, the second spring 224 and the third spring 36 work together to buffer and ensure structural stability.

[0021] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A prefabricated rapid inclined support device for foundation pit construction, comprising an embedded part (10) pre-embedded in the retaining wall of the foundation pit, and a main embedded part (11) and a secondary embedded part (12) pre-embedded in the bottom of the foundation pit, characterized in that, The wall-embedded parts (10) and the pit-embedded parts (11) are both equipped with inclined support units (20). The inclined support unit (20) includes a telescopic component (21), and both ends of the telescopic component (21) are equipped with ball joint assemblies (22). The telescopic component (21) is quickly connected to the wall embedded part (10) and the pit main embedded part (11) via the positioning plate (23) mounted on the ball joint assembly (22). The ball joint assembly (22) includes a ball joint seat (221) and a ball head (222) rotatably connected within the ball joint seat (221). The ball head (222) achieves axial force compensation via a limiting seat (223) fitted around the ball joint seat (221).

2. The prefabricated rapid inclined support equipment for foundation pit construction according to claim 1, characterized in that, The telescopic component (21) includes a main rod (211), a secondary rod (212) is inserted into the main rod (211), and an energy storage component is also assembled inside the main rod (211).

3. The prefabricated rapid inclined support equipment for foundation pit construction according to claim 2, characterized in that, The energy storage component includes a positioning seat (213) assembled in the main rod (211). One end of the positioning seat (213) is connected to a contact seat (214) through a slot. A first spring (215) is installed on one side wall of the contact seat (214), and one end of the first spring (215) is connected to the positioning seat (213).

4. The prefabricated rapid inclined support equipment for foundation pit construction according to claim 1, characterized in that, The top of the limiting seat (223) is fitted with a second spring (224) through an opening in the mounting hole, and the top of the second spring (224) is fixed with a guide post (225) that is inserted into the bottom wall of the ball joint seat (221). An adjusting bolt (226) that is rotatably connected to the top of the guide post (225) is threaded onto the outer wall of the ball joint seat (221).

5. The prefabricated rapid inclined support device for foundation pit construction according to claim 2, characterized in that, The wall-embedded part (10) has a contact plate (13) fixed on its front side, and an upper socket (14) is installed on the front side of the contact plate (13). The ball joint seat (221) located above is inserted into the upper socket (14) through the positioning plate (23). One end of the upper socket (14) is rotatably connected to a fixing seat (15), and the fixing seat (15) is connected to the positioning plate (23) through a pin.

6. The prefabricated rapid inclined support device for foundation pit construction according to claim 5, characterized in that, The top of the main embedded part (11) and the secondary embedded part (12) in the pit are both fixed with a lower socket (16), and the ball joint seat (221) located below is inserted into one of the lower sockets (16) through the positioning plate (23).

7. The prefabricated rapid inclined support equipment for foundation pit construction according to claim 6, characterized in that, The auxiliary support (30) is mounted on the sub-rod (212). The auxiliary support (30) includes a sleeve rod (31). A support rod (32) is inserted into the sleeve rod (31). One end of the support rod (32) is rotatably connected to a mounting frame (33). The mounting frame (33) is mounted on the sub-rod (212) by fastening bolts. The bottom end of the sleeve rod (31) is rotatably connected to a plug plate (34) that is compatible with the lower socket (16).

8. The prefabricated rapid inclined support equipment for foundation pit construction according to claim 7, characterized in that, A third spring (36) is mounted on the inner bottom wall of the sleeve (31), and an abutment seat (35) is installed at one end of the third spring (36).

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