Foundation pit supporting structure for water conservancy project

Abstract

The utility model relates to a foundation pit supporting structure for a water conservancy project. The utility model is suitable for the technical field of supporting structures. The technical problem to be solved by the utility model is to provide the foundation pit supporting structure for the water conservancy project. According to the technical scheme, the foundation pit supporting structure for the water conservancy project is characterized in that the foundation pit supporting structure for the water conservancy project comprises a bottom support installed at the inner bottom of a foundation pit through a plurality of fixing pieces; the bottoms of the supporting plates are connected to the ends of the bottom supports in an inserted mode, and the multiple supporting plates are transversely spliced through two-side insertion; the first sealing assembly is arranged at the joint of the bottom support and the supporting plate, and the first sealing assembly is used for sealing the joint of the bottom support and the supporting plate; the second sealing assembly is arranged on the side wall of the supporting plate and the side wall of the bottom support, and the second sealing assembly is used for sealing the connecting position of the inserting position of the supporting plate and the connecting position of the bottom support.

Description

Technical Field

[0001] The utility model relates to the technical field of supporting structures, in particular to a foundation pit supporting structure for water conservancy projects. Background Art

[0002] The foundation pit support structure in water conservancy projects is a key structure to ensure the stability and safety of the foundation pit. Its main function is to protect the soil around the foundation pit from erosion, collapse and deformation, and to ensure the smooth progress of the construction process. Foundation pit support is mainly divided into two types: single-sided support and double-sided support. Single-sided support structures include retaining walls, supporting structures, etc. Single-sided support usually occurs when the geological conditions are complex, the soil conditions on both sides are unstable, or the foundation pit is deep and the surrounding environment has high support requirements.

[0003] Chinese patent publication number CN218060337U discloses a foundation pit support structure for municipal water conservancy projects. The structure comprises a base, a support plate rotatably connected to the top side of the base, a support mechanism disposed between the front of the support plate and the top of the base, a fixing mechanism disposed on the surface of the base, and a disassembly mechanism disposed on the surface of the support plate. The support mechanism comprises a rotating member rotatably connected to the front of the support plate, and a telescopic rod fixedly connected to one side of the rotating member. This foundation pit support structure for municipal water conservancy projects can be folded between the base plate and the support plate, making it convenient and quick to transport, saving a considerable amount of space, and being able to secure the base to the ground.

[0004] However, in actual use, it was found that the base and the support plate of the device were connected by rotating the top side. Although this connection method can achieve flexible rotation of the base and the support plate, it also brings two problems:

[0005] (1) There is a gap between the base and the support plate, which makes it easy for water to seep in during the foundation pit support process;

[0006] (2) The joints between the multiple transversely spliced ​​bases and the support plates lack sealing, resulting in poor water seepage prevention effect of the entire support structure. Utility Model Content

[0007] The technical problem to be solved by the utility model is: in view of the above-mentioned problems, a foundation pit supporting structure for water conservancy projects is provided.

[0008] The technical solution adopted by the utility model is: a foundation pit support structure for water conservancy projects, characterized by comprising:

[0009] The bottom support is installed at the bottom of the foundation pit through multiple fixing parts;

[0010] A support plate, the bottom of which is plugged into the end of the bottom support, and a plurality of the support plates are horizontally spliced ​​by plugging at both sides;

[0011] a first sealing assembly, provided at the connection between the bottom support and the support plate, the first sealing assembly being used to seal the connection between the bottom support and the support plate;

[0012] The second sealing component is arranged on the side wall of the supporting plate and the bottom support, and the second sealing component is used to seal the connection between the plug-in joint of the supporting plate and the bottom support.

[0013] Through the above technical means, the bottom support and the supporting plate are assembled in a single group by plugging in, and multiple groups are spliced ​​in sequence through the supporting plates to form the foundation pit support structure in sequence. A first sealing component is added at the connection between the bottom support and the supporting plate. The first sealing component can seal the connection between the bottom support and the supporting plate, and the second sealing component is used to seal the plug-in connection between the supporting plates, thereby ensuring that both connections can have a good anti-seepage effect.

[0014] In some embodiments, a positioning groove is provided at the end of the bottom support, a positioning protrusion that is plugged into the positioning groove is provided at the bottom of the support plate, a first reinforcement component is provided at the connection between the bottom support and the support plate, a connecting groove is provided on one side of the support plate, a connecting protrusion that is plugged into the connecting groove is provided on the other side of the support plate, a second reinforcement component located at the connection point of the support plate is provided on the wall surface of the support plate, a first support component that can support the corresponding support plate is provided on the top of the bottom support, and a second support component that can support multiple spliced ​​support plates is provided on the wall surface of the support plate.

[0015] In some embodiments, the first sealing assembly includes a first sealing gasket, which is fixedly mounted on the top of the bottom support and located between the positioning groove and the positioning protrusion.

[0016] In some embodiments, the second sealing assembly includes a first outer rectangular frame, a second outer rectangular frame, an inner rectangular sealing frame, and a second sealing gasket; the first outer rectangular frame is provided on the outer side wall of the connecting groove and the positioning groove on the same side as the connecting groove; the second sealing gasket is provided on the inner side of the first outer rectangular frame; the second outer rectangular frame is provided on the outer side wall of the connecting protrusion and the positioning groove on the same side as the connecting protrusion; the inner rectangular sealing frame is provided on the inner side of the second outer rectangular frame;

[0017] When the connecting groove is plugged into the connecting protrusion, the first outer rectangular frame abuts against the second outer rectangular frame, the second sealing gasket abuts against the inner rectangular sealing frame, and the connection points of the inner and outer layers are staggered.

[0018] In some embodiments, the first reinforcement component includes a screw and a connecting plate, a plurality of the screws are provided at the top of the bottom support near the positioning groove, the wall surface of the support plate is connected with a plurality of the connecting plates corresponding to the screws, and the screws pass through the connecting plates and are connected via nuts.

[0019] In some embodiments, the second reinforcement component includes a fixing pin, a circular plate, a connecting rod, a spring and a pulling handle. The side wall of the connecting groove is vertically spaced apart with a plurality of circular cavities, the circular plate is slidably engaged in the circular cavity, the fixing pin is connected to the side of the circular plate facing the connecting protrusion, the connecting protrusion is provided with a connecting hole that can be plugged into the fixing pin, the other side of the circular plate is connected to the connecting rod that slides through the side wall of the connecting groove, the spring is sleeved on the connecting rod, one end of the spring is connected to the circular plate, and the other end of the spring is connected to the side wall of the connecting groove, and the multiple pulling ends on the pulling handle are respectively connected to the ends of the multiple connecting rods.

[0020] In some embodiments, the first support assembly includes a first support rod, a second support rod and a raised connecting block. A receiving groove is provided on the top of the bottom support, and the first support rod is hinged in the receiving groove. The second support rod is slidably connected in the first support rod. A plurality of bolt holes are provided on the second support rod. The connection length between the first support rod and the second support rod is adjusted and fixed by bolts. The raised connecting block is provided on the wall surface of the support plate facing the bottom support, and the second support rod can abut against the bottom of the raised connecting block after being extended.

[0021] In some embodiments, the second support assembly includes a semicircular seat and a reinforcement rod. A plurality of semicircular seats are arranged laterally on the wall surfaces of the plurality of support plates. A through hole is provided inside the semicircular seat. The reinforcement rod is plugged into the through hole in the semicircular seat. The reinforcement rod passes through the semicircular seats on the plurality of support plates. A support pile body is provided in the foundation pit. Both ends of the reinforcement rod are bolted to the support pile body.

[0022] In some embodiments, the bottom support and the support plate are both made of hot-rolled steel plate material, and the side of the support plate facing the inner wall of the foundation pit is provided with an anti-corrosion coating, and the anti-corrosion coating is made of polyurethane paint.

[0023] In some embodiments, the fixing member includes a ground nail, and a barb is provided on the surface of the ground nail.

[0024] The beneficial effects of the utility model are:

[0025] 1. In this structure, the bottom support and the supporting plate are plug-in connected. By arranging a first sealing component at the connection between the bottom support and the supporting plate, the first sealing gasket in the first sealing component can have a sealing effect on the connection. Multiple bottom supports and support plates can be spliced ​​horizontally. By arranging a second sealing component at the plug-in connection of the support plate and the splicing connection of the bottom support, the second sealing component forms a double-layer protection structure for the connection. The first outer rectangular frame and the second outer rectangular frame are abutted to form an outer layer of anti-seepage, and the inner rectangular sealing frame and the second sealing gasket are used to form an inner layer of anti-seepage, thereby effectively ensuring the sealing of the connection and ensuring that during the foundation pit support process, water inside the foundation pit will not seep out through the connection between the bottom support and the supporting plate and the plug-in connection between the support plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural diagram of multiple groups assembled in this application.

[0027] Figure 2 It is a structural diagram of this application group.

[0028] Figure 3 It is a schematic diagram of the partial explosion structure of this application.

[0029] Figure 4 It is a structural diagram of the joint of the support plates in this application.

[0030] Description of reference numerals:

[0031] 1. Bottom support; 2. Support plate; 3. Positioning groove; 4. Positioning protrusion; 5. Screw; 6. Connecting plate; 7. First sealing gasket; 8. Connecting groove; 9. Connecting protrusion; 10. Second reinforcement component; 11. First outer rectangular frame; 12. Second outer rectangular frame; 13. Inner rectangular sealing frame; 14. Second sealing gasket; 15. Circular cavity; 16. Circular plate; 17. Fixing pin; 18. Connecting hole; 19. Connecting rod; 20. Spring; 21. Pull handle; 22. Storage slot; 23. First support rod; 24. Second support rod; 25. Raised connecting block; 26. Semicircular seat; 27. Through hole; 28. Reinforcement connecting rod; 29. ​​Ground nail; 30. Polyurethane paint.

[0032] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures, or characteristics may be combined in any suitable manner consistent with the present disclosure.

[0033] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.

[0034] “First,” “second,” etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0036] Combine Figures 1 to 4 As shown, this embodiment is a foundation pit support structure for water conservancy projects, comprising a bottom support 1, a support plate 2, a first sealing assembly, and a second sealing assembly. The bottom support 1 is installed at the bottom of the foundation pit via multiple fixings, and the bottom of the support plate 2 is plugged into the end of the bottom support 1. The bottom support 1 and the support plate 2 are plugged together to form a single support structure. Multiple support structures are laterally spliced ​​together by plugging together on both sides of the support plate 2. A first sealing assembly is provided at the connection between the bottom support 1 and the support plate 2. The first sealing assembly can seal the connection between the bottom support 1 and the support plate 2. A second sealing assembly is provided on the plug-in side wall of the support plate 2 and the side wall of the bottom support 1. The second sealing assembly is used to seal the connection between the plug-in part of the support plate 2 and the bottom support 1.

[0037] Furthermore, in this embodiment, the fixing parts include ground nails 29, and the surface of the ground nails 29 is provided with barbs to facilitate the staff to hammer the ground nails 29 into the soil. A plurality of ground nails 29 are provided through the bottom support 1, and the bottom support 1 is fixed to the bottom of the foundation pit through the plurality of ground nails 29, thereby improving the stability of the bottom support 1.

[0038] Furthermore, in this embodiment, the bottom support 1 and the support plate 2 are both made of hot-rolled steel plates. Due to their high rigidity and good bearing capacity, hot-rolled steel plates are suitable for foundation pit supports that require high strength and stability. In particular, for deep foundation pits or situations requiring complex-shaped support structures, steel plates can provide good support effects. The side of the support plate 2 facing the inner wall of the foundation pit is provided with an anti-corrosion coating. Specifically, in this embodiment, the anti-corrosion coating uses polyurethane paint 30. The polyurethane paint 30 is used to improve the anti-corrosion effect of the side of the support plate 2 that is in contact with the foundation pit. The polyurethane paint 30 is a coating with multiple advantages, such as strong anti-corrosion performance, high hardness, and strong adhesion.

[0039] In some embodiments, a positioning groove 3 is provided at the end of the bottom support 1, a positioning protrusion 4 that plugs into the positioning groove 3 is provided at the bottom of the support plate 2, and a first reinforcement component is provided at the connection between the bottom support 1 and the support plate 2. The first reinforcement component is used to reinforce the connection between the bottom support 1 and the support plate 2. A connecting groove 8 is provided on one side of the support plate 2, and a connecting protrusion 9 that plugs into the connecting groove 8 is provided on the other side of the support plate 2. A second reinforcement component 10 is provided on the wall surface of the support plate 2 at the connection point of the support plate 2. The second reinforcement component 10 is used to reinforce the connection between multiple support plates 2. The top of each bottom support 1 is provided with a first support component capable of supporting the corresponding support plate 2, and the wall surface of the support plate 2 is provided with a second support component capable of supporting multiple spliced ​​support plates 2.

[0040] Furthermore, the first sealing assembly includes a first sealing gasket 7, which is fixedly installed on the top of the bottom support 1 and is located between the positioning groove 3 and the positioning protrusion 4. The first sealing gasket 7 can improve the sealing of the connection between the bottom support 1 and the support plate 2, so that water mixed in the foundation pit will not seep out from the connection between the bottom support 1 and the support plate 2 during foundation pit support.

[0041] Furthermore, the second sealing assembly includes a first outer rectangular frame 11, a second outer rectangular frame 12, an inner rectangular sealing frame 13 and a second sealing gasket 14. The first outer rectangular frame 11 is provided on the peripheral side of the connecting groove 8 on the support plate 2, and the first outer rectangular frame 11 is provided on the side wall on the same side as the connecting groove 8 on the bottom support 1. The second sealing gasket 14 is provided on the inner side of the first rectangular frame. The second outer rectangular frame 12 is provided on the peripheral side of the connecting protrusion 9 on the support plate 2, and the second outer rectangular frame 12 is provided on the side wall on the same side as the connecting protrusion 9 on the bottom support 1. The inner side of the second outer rectangular frame 12 is provided with an inner rectangular sealing frame 13.

[0042] When the connecting groove 8 is plugged into the connecting protrusion 9, the first outer rectangular frame 11 and the second outer rectangular frame 12 are correspondingly abutted, and the inner rectangular sealing frame 13 is inserted into the first outer rectangular frame 11 until the second sealing gasket 14 and the inner rectangular sealing frame 13 are correspondingly abutted. The connection points of the inner and outer layers are staggered, thereby completing the sealing of the connection between the bottom supports 1 and the support plates 2, so that when supporting the foundation pit, the water inside the foundation pit will not seep out through the connection between the bottom support 1 and the support plate 2, thereby improving the anti-seepage effect of the foundation pit.

[0043] Furthermore, the first reinforcement component includes screws 5 and connecting plates 6. A plurality of screws 5 are provided at the top of the bottom support 1 near the positioning groove 3. The wall surface of the support plate 2 is connected with a plurality of connecting plates 6 corresponding to the screws 5. The screws 5 pass through the connecting plates 6 and are connected through nuts to facilitate further fixation of the positioned and installed support plate 2.

[0044] Further, such as Figure 4 As shown, the second reinforcement assembly 10 includes a fixing pin 17, a circular plate 16, a connecting rod 19, a spring 20, and a pulling handle 21. The sidewall of the connecting groove 8 is vertically spaced apart with a plurality of circular cavities 15. A circular plate 16 is slidably engaged within the circular cavity 15. The side of the circular plate 16 facing the connecting protrusion 9 is connected to the fixing pin 17. The connecting protrusion 9 is provided with a connecting hole 18 that can be plugged into and mate with the fixing pin 17. The other side of the circular plate 16 is connected to a connecting rod 19 that slides through the sidewall of the connecting groove 8. A spring 20 is sleeved on the connecting rod 19. One end of the spring 20 is connected to the circular plate 16, and the other end of the spring 20 is connected to the sidewall of the connecting groove 8. The pulling handle 21 has multiple pulling ends that are respectively connected to the ends of the multiple connecting rods 19. Specifically, in this embodiment, there are three circular cavities 15. The pulling handle 21 is U-shaped, and the pulling handle 21 has three corresponding pulling ends.

[0045] When the support plates 2 need to be spliced, pull the U-shaped pulling handle 21, and the pulling handle 21 drives the connecting rod 19, the circular plate 16 and the fixing pin 17 to slide outward, inserting the connecting protrusion 9 into the connecting groove 8, and release the pulling handle 21. The circular plate 16 and the fixing pin 17 are reset under the elastic action of the spring 20, so that the fixing pin 17 is inserted into the connecting hole 18 of the connecting protrusion 9, thereby completing the fixation of the connecting protrusion 9 and the connecting groove 8, so that multiple support plates 2 are further spliced ​​together to form an integral support structure.

[0046] Furthermore, the first support assembly includes a first support rod 23, a second support rod 24, and a raised connecting block 25. The top of the bottom support 1 is provided with a storage slot 22. The first support rod 23 is hinged in the storage slot 22. The second support rod 24 is slidably connected in the first support rod 23. The second support rod 24 is provided with multiple bolt holes. The connection length between the first support rod 23 and the second support rod 24 is adjusted and fixed by bolts. A raised connecting block 25 is provided on the wall surface of the support plate 2 facing the bottom support 1. After the second support rod 24 is extended, it can abut the bottom of the raised connecting block 25, thereby providing support for the support plate 2 and improving the support stability of the support plate 2. The storage slot 22 allows the first support rod 23 to be stored when not in use, thereby facilitating transportation and carrying.

[0047] Furthermore, the second support assembly includes a semicircular seat 26 and a reinforcement link 28. Multiple semicircular seats 26 are arranged transversely on the wall surfaces of the multiple support plates 2. Specifically, in this embodiment, two semicircular seats 26 are provided. Through holes 27 are provided inside the semicircular seats 26. The reinforcement link 28 engages with the through holes 27 in the semicircular seats 26. A single reinforcement link 28 passes through the semicircular seats 26 at the same height on multiple support plates 2. Support piles are provided in the foundation pit, and both ends of the reinforcement link 28 are bolted to the support piles. The reinforcement link 28 can further reinforce the support structure that is spliced ​​together to form a whole, thereby improving the support effect of the support plates 2 on the foundation pit.

[0048] The implementation principle of a foundation pit support structure for a water conservancy project is as follows:

[0049] The operator first inserts the positioning bump 4 into the positioning groove 3 to facilitate the positioning and installation of the bottom support 1 and the support plate 2. This step ensures the initial positioning and relative positioning of the two. Next, the screw 5, connecting plate 6, and nut provided in the first reinforcement assembly facilitate the positioning and installation of the support plate 2, ensuring its secure attachment to the top surface of the bottom support 1. When the support plate 2 is fixed to the bottom support 1, the first sealing gasket 7 provides a good sealing effect, improving the sealing at the connection between the top of the bottom support 1 and the bottom of the support plate 2.

[0050] Next, the operator pulls the U-shaped pulling handle 21 in the second reinforcement component 10, and the pulling handle 21 drives the connecting rod 19, the circular plate 16 and the fixing pin 17 to move toward the inside of the circular cavity 15. This step is to make the connecting protrusion 9 better inserted into the connecting groove 8. When the connecting protrusion 9 is fully inserted into the connecting groove 8, the pulling handle 21 is released. At this time, the fixing pin 17 will automatically insert into the connecting hole 18 under the action of the spring 20 releasing the rebound force, thereby achieving the limiting fixation of the connecting protrusion 9 and ensuring that the two bottom supports 1 and the support plate 2 are firmly connected together. At the same time, the inner rectangular sealing frame 13 will be inserted into the interior of the first outer rectangular frame 11 and in close contact with the second sealing gasket 14, so as to further improve the sealing of the connection between the bottom support 1 and the support plate 2, ensuring that during the foundation pit support process, the water inside the foundation pit will not seep out through the connection between the bottom support 1 and the support plate 2, thereby improving the anti-seepage effect of the foundation pit.

[0051] In this structure, the bottom support 1 and the support plate 2 are easy to disassemble and install, and are convenient to transport and carry. When a large area of ​​the foundation pit needs to be supported, multiple bottom supports 1 and support plates 2 can be spliced ​​together horizontally to form an overall foundation pit support structure. This design not only improves the installation efficiency, but also effectively improves the sealing of the splicing point through the combined design of the first outer rectangular frame 11, the second outer rectangular frame 12, the inner rectangular sealing frame 13 and the second sealing gasket 14, thereby ensuring the stability inside the foundation pit.

[0052] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A foundation pit support structure for water conservancy projects, characterized in that: include: A bottom support (1) is installed at the bottom of the foundation pit via a plurality of fixing members; A support plate (2) whose bottom is plugged into the end of the bottom support (1), and a plurality of the support plates (2) are horizontally spliced ​​by plugging at both sides; A first sealing component is provided at the connection between the bottom support (1) and the support plate (2), and the first sealing component is used to seal the connection between the bottom support (1) and the support plate (2); A second sealing component is provided on the side walls of the support plate (2) and the bottom support (1), and the second sealing component is used to seal the connection between the insertion point of the support plate (2) and the bottom support (1).

2. A foundation pit support structure for water conservancy projects according to claim 1, characterized in that: The end of the bottom support (1) is provided with a positioning groove (3), the bottom of the support plate (2) is provided with a positioning protrusion (4) that is plugged into the positioning groove (3), the connection between the bottom support (1) and the support plate (2) is provided with a first reinforcement component, one side of the support plate (2) is provided with a connecting groove (8), the other side of the support plate (2) is provided with a connecting protrusion (9) that is plugged into the connecting groove (8), the wall surface of the support plate (2) is provided with a second reinforcement component (10) located at the plug-in position of the support plate (2), the top of the bottom support (1) is provided with a first support component that can support the corresponding support plate (2), and the wall surface of the support plate (2) is provided with a second support component that can support multiple spliced ​​support plates (2).

3. A foundation pit support structure for water conservancy projects according to claim 2, characterized in that: The first sealing assembly comprises a first sealing gasket (7), which is fixedly mounted on the top of the bottom support (1) and is located between the positioning groove (3) and the positioning protrusion (4).

4. A foundation pit support structure for water conservancy projects according to claim 2, characterized in that: The second sealing assembly comprises a first outer rectangular frame (11), a second outer rectangular frame (12), an inner rectangular sealing frame (13) and a second sealing gasket (14); the first outer rectangular frame (11) is provided on the peripheral side of the connecting groove (8) and the outer side wall of the positioning groove (3) on the same side as the connecting groove (8); the second sealing gasket (14) is provided on the inner side of the first outer rectangular frame (11); the second outer rectangular frame (12) is provided on the peripheral side of the connecting protrusion (9) and the outer side wall of the positioning groove (3) on the same side as the connecting protrusion (9); and the inner side of the second outer rectangular frame (12) is provided with the inner rectangular sealing frame (13); When the connecting groove (8) is plugged into the connecting protrusion (9), the first outer rectangular frame (11) and the second outer rectangular frame (12) are in corresponding contact, and the second sealing gasket (14) and the inner rectangular sealing frame (13) are in corresponding contact, and the connection points where the inner and outer layers contact are staggered.

5. The foundation pit support structure for water conservancy projects according to claim 2, characterized in that: The first reinforcement component comprises a screw rod (5) and a connecting plate (6); a plurality of the screw rods (5) are provided at the top of the bottom support (1) near the positioning groove (3); a plurality of the connecting plates (6) corresponding to the screw rods (5) are connected to the wall surface of the support plate (2); the screw rods (5) pass through the connecting plates (6) and are connected via nuts.

6. The foundation pit support structure for water conservancy projects according to claim 2, characterized in that: The second reinforcement component (10) includes a fixing pin (17), a circular plate (16), a connecting rod (19), a spring (20) and a pulling handle (21); a plurality of circular cavities (15) are vertically spaced apart on the side wall of the connecting groove (8); the circular plate (16) is slidably engaged in the circular cavity (15); the fixing pin (17) is connected to the side of the circular plate (16) facing the connecting protrusion (9); and the connecting protrusion (9) is provided with a spring that can engage with the fixing pin (17). ) plug-in connecting hole (18), the other side of the circular plate (16) is connected with the connecting rod (19) which slides through the side wall of the connecting groove (8), the connecting rod (19) is sleeved with the spring (20), one end of the spring (20) is connected to the circular plate (16), and the other end of the spring (20) is connected to the side wall of the connecting groove (8), and multiple pulling ends on the pulling handle (21) are respectively connected to the ends of multiple connecting rods (19).

7. The foundation pit support structure for water conservancy projects according to claim 2, characterized in that: The first support assembly comprises a first support rod (23), a second support rod (24) and a raised connecting block (25); a receiving groove (22) is provided on the top of the bottom support (1); the first support rod (23) is hinged in the receiving groove (22); the second support rod (24) is slidably connected in the first support rod (23); a plurality of bolt holes are provided on the second support rod (24); the connection length between the first support rod (23) and the second support rod (24) is fixed by adjusting bolts; the raised connecting block (25) is provided on the wall surface of the support plate (2) facing the bottom support (1); the second support rod (24) can abut against the bottom of the raised connecting block (25) after being extended.

8. The foundation pit support structure for water conservancy projects according to claim 2, characterized in that: The second supporting assembly includes a semicircular seat (26) and a reinforcing connecting rod (28). A plurality of transversely arranged semicircular seats (26) are provided on the wall surfaces of the plurality of supporting plates (2). A through hole (27) is provided inside the semicircular seat (26). The reinforcing connecting rod (28) is plugged into and matched with the through hole (27) inside the semicircular seat (26). The reinforcing connecting rod (28) passes through the semicircular seats (26) on the plurality of supporting plates (2). A supporting pile body is provided in the foundation pit, and both ends of the reinforcing connecting rod (28) are bolted to the supporting pile body.

9. The foundation pit support structure for water conservancy projects according to claim 1, characterized in that: The bottom support (1) and the support plate (2) are both made of hot-rolled steel plate material. The side of the support plate (2) facing the inner wall of the foundation pit is provided with an anti-corrosion coating, and the anti-corrosion coating adopts polyurethane paint (30).

10. A foundation pit support structure for water conservancy projects according to any one of claims 1 to 9, characterized in that: The fixing member comprises a ground nail (29), and a barb is provided on the surface of the ground nail (29).

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