A water-stopping cofferdam structure for supporting a steel pipe pile foundation pit

Abstract

The present application relates to a steel pipe pile foundation pit support water-stopping cofferdam structure, and relates to the technical field of waterproof structure, which includes a fixed structure, a fixed pile and a supporting device; the fixed structure includes a fixed plate, and a mounting plate is installed at the fixed plate, and the mounting plate supports the fixed pile; the supporting device is located inside the structure surrounded by multiple fixed piles and arranged in a mesh, and the supporting device includes a fixed pipe, and sliding rods are provided at both ends of the fixed pipe, and the sliding rods slide along the axial direction of the fixed pipe; a locking device is provided at one end of the sliding rod away from the fixed pipe, and the locking device includes a support block, and the support block is fixedly connected to the sliding rod, and the side wall of the support block is provided with a mounting rod, and the mounting rod and the support block are elastically hinged, and the mounting rod is spaced apart with a fitting, and the fitting includes an elastic rod and a stop plate, and the two ends of the elastic rod are respectively fixedly connected to the mounting rod and the stop plate. The present application has the effect of being able to provide stable water-stopping and support operations for the side wall of the foundation pit in different geographical environments.

Description

Technical Field

[0001] The present application relates to the technical field of waterproof structures, and in particular to a steel pipe pile foundation pit support water-stopping cofferdam structure. Background Art

[0002] With the continuous advancement of urbanization, the construction area of ​​buildings is also constantly expanding. In the process of foundation pit construction, after completing the excavation of the foundation pit, it is necessary to support and stop the water on the foundation pit to ensure the dryness and stability of the inside of the foundation pit, and to provide stable support for the related buildings on the upper level.

[0003] In the related art, when carrying out support operations, traditional technologies are usually used for support, including steel sheet pile enclosures, underground continuous walls, cement mixing piles and other forms. Usually, a retaining structure is formed by driving steel plates to a certain depth, or an underground continuous wall is used to provide support for the side walls of the foundation pit to prevent the side walls of the foundation pit from collapsing, and to stop water to a certain extent.

[0004] Regarding the above-mentioned related technologies, due to the different soil qualities, the support structure formed simply by steel plates is prone to certain deformation, which in turn affects the support effect on the side walls of the foundation pit. Retaining walls are formed by digging slots and pouring concrete in them, which will cause an increase in overall costs and thus affect the overall economic benefits. Summary of the invention

[0005] In order to provide stable water-stopping and support operations for the side walls of foundation pits in different geographical environments, the present application provides a steel pipe pile foundation pit support water-stopping cofferdam structure.

[0006] The present application provides a steel pipe pile foundation pit support water-stopping cofferdam structure, which adopts the following technical solution:

[0007] A steel pipe pile foundation pit support water-stopping cofferdam structure, comprising a fixed structure, fixed piles and a supporting device;

[0008] The fixing structure includes a plurality of fixing plates arranged along the foundation pit array, and a plurality of mounting plates are installed on the fixing plates, and the mounting plates are used to support the fixing piles;

[0009] The support device is located inside the structure surrounded by the plurality of fixed piles and arranged in a mesh shape, and the support device includes a fixed tube, both ends of which are provided with sliding rods, and the sliding rods can slide along the axial direction of the fixed tube;

[0010] The sliding rod is provided with a locking device at one end away from the fixed tube, and the locking device includes a support block, and the support block is fixedly connected to the sliding rod. The side walls of the support block are provided with mounting rods, and the mounting rods are elastically hinged to the support block at one end of the support block away from the sliding rod. The mounting rod is provided with a plurality of fittings at intervals, and the fittings include an elastic rod and a stop plate, and the two ends of the elastic rod are respectively fixedly connected to the mounting rod and the stop plate.

[0011] By adopting the above technical solution, the operator first lays a corresponding number of fixed plates according to the shape of the foundation pit, and then the operator fixes the installation plate to the corresponding position of the fixed plate. The installation plate is used to fix the fixed piles, so that the fixed piles complete the corresponding enclosure of the foundation pit, and can provide corresponding support and waterproofing for the foundation pit. The operator can support the inside of the structure surrounded by the fixed piles through the support device. The operator first places the fixed pipe in the corresponding position, and then adjusts the position of the sliding rod, so that the end of the support block can fit between the adjacent fixed piles. At this time, the installation rod can rotate accordingly according to the position of the fixed pile. At the same time, the stop plate fits the inner wall of the fixed pile through the elastic rod, which can provide support for the fixed pile, prevent the fixed pile from shifting and bending, and ensure the stability of the position of the fixed pile, so as to provide stable water-stopping and support operations for the side wall of the foundation pit in different geological environments.

[0012] Optionally, a stop pad is provided on the end surface of the stop plate away from the elastic rod, and the stop pad is fixedly connected to the stop plate.

[0013] By adopting the above technical solution, the setting of the stop pad can block the gap between the stop plate and the fixed pile, thereby preventing the fitting effect between the fixed pile and the stop plate from decreasing, and ensuring the supporting effect of the fixed pile.

[0014] Optionally, each of the sliding rods is equipped with a driving member, which includes a worm, a worm wheel, a first gear and a rack. The worm and the sliding rod are in the same axial direction and are rotatably connected to the fixed tube. The worm wheel and the worm are meshed. The first gear and the worm wheel are coaxially fixedly connected. The first gear and the rack are meshed. The long side direction of the rack is parallel to the axial direction of the sliding rod and is fixedly connected to the sliding rod.

[0015] By adopting the above technical solution, the worm rotates, the worm and the worm wheel mesh, thereby driving the worm wheel to rotate, the worm wheel and the first gear are coaxially fixedly connected, the first gear and the rack mesh, thereby driving the rack to slide, and the self-locking between the worm wheel and the worm ensures that the sliding rod cannot slide in any direction.

[0016] Optionally, the fixed tube is equipped with a driving assembly, which includes a driving rod, a first bevel gear and a second bevel gear. The driving rod passes through the fixed tube and is rotatably connected to the fixed tube. The first bevel gear and the driving rod are coaxially fixedly connected. The second bevel gear and the first bevel gear are meshed, and the second bevel gear and the worm are coaxially fixedly connected.

[0017] By adopting the above technical solution, the driving rod rotates, driving the first bevel gear to rotate, the first bevel gear and the second bevel gear engage, thereby driving the second bevel gear to rotate, the second bevel gear and the worm are fixedly connected, thereby driving the worm to rotate, causing the sliding rod to slide.

[0018] Optionally, a connecting piece is provided at one end of the driving rod away from the first bevel gear, and the connecting piece is used to be connected to a driving source.

[0019] By adopting the above technical solution and the setting of the connecting piece, it is convenient for the operator to drive the first bevel gear to rotate, thereby driving the sliding rod to slide, thereby improving the working efficiency of the operator.

[0020] Optionally, a sealing strip is sandwiched between two adjacent fixing piles, and a waterproof pad is sandwiched between the fixing pile and the mounting plate.

[0021] By adopting the above technical solution, the setting of the sealing strip can seal the gap between two adjacent fixed piles. At the same time, the setting of the waterproof pad can seal the gap between the fixed pile and the installation plate to avoid water seepage and improve the water-stopping effect.

[0022] Optionally, a fixing block is fixedly connected in the center of the mounting plate, and locking blocks are evenly distributed around the fixing block. The locking blocks can slide in a direction approaching or away from the fixing block, and the locking blocks can fit against the inner wall of the fixing pile.

[0023] By adopting the above technical solution, the setting of the fixing block can provide support for the installation of the locking block. The operator can adjust the position of the locking block to limit the fixing piles of different sizes, thereby improving the overall applicability of the device.

[0024] Optionally, a slide groove is provided on the top of the fixing plate, and the slide groove is projected into a rectangle in the vertical direction, and the mounting plate can slide along the slide groove.

[0025] By adopting the above technical solution, the setting of the slide groove makes it easy for the operator to adjust the position of the installation plate. The slide groove is set in a rectangular shape, which is convenient for splicing and can form a stable rectangular arrangement at the outermost part of the slide groove, thereby providing arrangement support for the fixed piles.

[0026] Optionally, a fixing nail is provided on the bottom wall of the fixing plate, a fixing groove is coaxially provided on the fixing nail, a plurality of through grooves are evenly distributed circumferentially on the side wall of the fixing nail, the fixing grooves are connected to the through grooves, abutment blocks are provided in the fixing grooves, the abutment blocks slide along the fixing grooves, a positioning rod is provided in each through groove, and it slides elastically along the through groove, and the end of the positioning rod is always in abutment with the side wall of the abutment block.

[0027] By adopting the above technical solution, the setting of the fixing nail can be driven into the ground to provide preliminary positioning for the fixing plate; then, by making the abutment block slide along the fixing groove, the positioning rod can abut against the side wall of the abutment block, thereby driving the positioning rod to slide along the through groove and push the positioning rod out, thereby further completing the fixing of the fixing plate.

[0028] Optionally, each side wall of the fixing plate is provided with a positioning groove and a positioning block, and the positioning groove is used to accommodate the positioning block.

[0029] By adopting the above technical solution, the cooperation between the positioning block and the positioning groove can facilitate the operator to connect adjacent fixing plates, thereby improving the operator's work efficiency.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] By setting the support device, the fixed pile can be supported from the inside of the fixed pile, thereby preventing the fixed pile from shifting, and thus providing stable support for the fixed pile in different geological environments, thereby completing water stopping and supporting operations on the side wall of the foundation pit;

[0032] By providing a locking device, the sliding rod can be better fitted to the outer wall of the fixed pile, so as to better support the fixed pile;

[0033] By setting up the fixing structure, the installation of the fixed pile can be provided with stable support and fixed to the corresponding position on the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the bottom component structure;

[0036] Figure 3 is a schematic diagram of a cross section of a fixing nail;

[0037] Figure 4 yes Figure 1 The enlarged schematic diagram of part A in the middle;

[0038] Figure 5 is a schematic diagram of a fixed pipe cross section;

[0039] Figure 6 It is a schematic diagram of the locking device structure.

[0040] Reference numerals: 1, fixing structure; 11, bottom assembly; 111, fixing plate; 112, positioning block; 113, positioning groove; 12, positioning piece; 121, fixing nail; 122, adjusting bolt; 123, abutment block; 124, fixing groove; 125, positioning rod; 126, first spring; 127, limiting block; 128, abutment plate; 13, slide groove; 14, mounting assembly; 141, slider; 142, mounting plate; 143, fixing block; 144, second spring; 145, locking block; 2, protection structure; 21, fixing pile; 22. Waterproof pad; 23. Sealing strip; 3. Support device; 31. Fixed tube; 32. Sliding rod; 33. Driving assembly; 331. Driving rod; 332. First bevel gear; 333. Second bevel gear; 334. Connecting rod; 34. Driving member; 341. Worm; 342. Worm wheel; 343. First gear; 344. Rack; 4. Locking device; 41. Support block; 42. Fitting assembly; 421. Mounting rod; 422. Third spring; 43. Fitting member; 431. Elastic rod; 432. Stop plate; 433. Stop pad. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-6 This application is described in further detail.

[0042] The embodiment of the present application discloses a steel pipe pile foundation pit support water-stopping cofferdam structure.

[0043] Reference Figure 1 A steel pipe pile foundation pit support water-stopping cofferdam structure includes a fixed structure 1, a protective structure 2, a supporting device 3 and a locking device 4.

[0044] Reference Figure 1 and Figure 2 The fixed structure 1 includes a bottom component 11, and the bottom component 11 includes a fixed plate 111. In this embodiment, the fixed plate 111 is preferably a rectangular plate. A plurality of fixed plates 111 are provided, and the plurality of fixed plates 111 are arranged in an array along the edge of the bottom wall of the foundation pit.

[0045] Reference Figure 1 and Figure 2 Each side wall of the fixing plate 111 is provided with a positioning block 112 and a positioning groove 113. Here, the horizontal cross-sections of the positioning block 112 and the positioning groove 113 are both trapezoidal, wherein the positioning block 112 is detachably connected to the fixing plate 111 by screw fixing.

[0046] Reference Figure 1 and Figure 2In this embodiment, in the end faces of two adjacent fixing plates 111 close to each other, the positioning groove 113 of one fixing plate 111 is used to accommodate the positioning block 112 of the other fixing plate 111, and the positioning block 112 can slide along the positioning groove 113; the positioning block 112 at the edge of the fixing plate 111 located at the edge and located at the edge of the foundation pit can be removed and slid along the positioning groove 113 of the side wall by insertion.

[0047] Reference Figure 1 and Figure 3 A positioning piece 12 is provided at each corner of the bottom wall of the fixed plate 111, and the positioning piece 12 includes a fixing nail 121, an adjusting bolt 122 and an abutment block 123. In this embodiment, the positioning nail is preferably a conical nail, and the large end of the positioning nail is coaxially provided with a fixing groove 124, the adjusting bolt 122 is vertically arranged, and the adjusting bolt 122 and the fixing nail 121 are coaxially arranged, the adjusting bolt 122 is penetrated by the fixing plate 111, and the adjusting bolt 122 and the fixing plate 111 are threadedly connected. In this embodiment, the abutment block 123 is preferably a conical block, the abutment block 123 is located in the fixing groove 124, and the large end of the abutment block 123 is located on the side close to the fixing plate 111, and the abutment block 123 is fixedly connected to the adjusting bolt 122 by screw fixing.

[0048] Reference Figure 1 and Figure 3 The side wall of the fixing nail 121 is penetrated with a through slot in the horizontal direction. In this embodiment, there are multiple through slots, preferably four, and the multiple through slots are evenly distributed in the vertical direction. The fixing nail 121 is provided with a limiting slot in the horizontal direction on the side wall of each through slot, and the limiting slot is connected to the inner cavity of the fixing slot 124 through the through slot.

[0049] Reference Figure 1 and Figure 3 The inner cavity of each through slot is provided with a positioning rod 125, a first spring 126 and a limiting block 127. The positioning rod 125 is arranged horizontally, and the side wall of the positioning rod 125 is attached to the side wall of the through slot. The end of the positioning rod 125 is attached to the abutment block 123 and can slide along the axis direction of the through slot. The first spring 126 and the limiting block 127 are both located in the limiting slot. The first spring 126 can be extended and retracted along the axis direction of the limiting slot. The two ends of the first spring 126 are respectively fixedly connected to the fixing nail 121 and the limiting block 127 by screw fixing. The limiting block 127 slides along the axis direction of the through slot through the first spring 126, and the limiting block 127 is fixedly connected to the positioning rod 125 by screw fixing.

[0050] Reference Figure 1 and Figure 3An abutment plate 128 is provided at one end of the positioning rod 125 away from the abutment block 123. In the present embodiment, the abutment plate 128 is preferably a rectangular plate, and the abutment plate 128 is fixedly connected to the positioning rod 125 by screws. The end surface of the abutment plate 128 away from the positioning rod 125 is provided with spikes, and the spikes are arranged in a planar array along the abutment plate 128, and the spikes are fixedly connected to the abutment plate 128 by screws.

[0051] Reference Figure 1 and Figure 2 The top wall of the fixing plate 111 is provided with a slide groove 13 along the vertical direction. In this embodiment, the projection of the slide groove 13 along the vertical direction is a rectangle. The inner cavity of the slide groove 13 is provided with a plurality of mounting components 14, and the plurality of mounting components 14 are arranged in sequence along the long side direction of the slide groove 13. The mounting component 14 includes a slider 141 and a mounting plate 142. The slider 141 is located in the inner cavity of the slide groove 13 and can slide along the slide groove 13. In this embodiment, the mounting plate 142 is preferably a circular plate, and the mounting plate 142 is fixedly connected to the top wall of the slider 141 by screws.

[0052] Reference Figure 1 and Figure 2 A fixing block 143 is coaxially provided on the top wall of the mounting disk 142, and the fixing block 143 is fixedly connected to the mounting disk 142 by screws. A plurality of second springs 144 are evenly distributed on the side walls of the fixing block 143, and the extension and contraction direction of the second spring 144 is parallel to the radial direction of the mounting disk 142. The second spring 144 is fixedly connected to the fixing block 143 by screws. A locking block 145 is provided at one end of the second spring 144 away from the fixing block 143. In this embodiment, the locking block 145 is preferably a right-angled trapezoid, wherein one right-angled side of the locking block 145 is attached to the top wall of the mounting disk 142, and two side walls parallel to each other are perpendicular to the mounting disk 142, and the longer side wall is attached to the second spring 144, and the locking block 145 is fixedly connected to the second spring 144 by screws.

[0053] Reference Figure 1 and Figure 2 In this embodiment, the maximum compression length of the second spring 144 is greater than the diameter of the mounting plate 142. At the same time, a friction pad is provided on the end surface of the locking block 145 away from the second spring 144, and the friction pad is fixedly connected to the locking block 145 by screws.

[0054] Reference Figure 1 and Figure 4 The protective structure 2 includes a fixing pile 21, which is preferably a hollow circular tube. A plurality of fixing piles 21 are provided, and the fixing piles 21 are vertically arranged. The friction pad of the locking block 145 is fitted to the inner wall of the fixing pile 21, and the fixing piles 21 are arranged in sequence along the outermost edges of the plurality of fixing plates 111, and the fixing piles 21 are tightly fitted to each other.

[0055] Reference Figure 1 and Figure 4 A waterproof pad 22 is sandwiched between the bottom wall of the fixing pile 21 and the top wall of the fixing plate 111, and the waterproof pad 22 is fixedly connected to the fixing pile 21 by screws. A sealing strip 23 is provided between two adjacent fixing piles 21, and the sealing strip 23 is fixedly connected to the fixing pile 21 by screws.

[0056] Reference Figure 1 The supporting device 3 is located in the inner cavity of the area surrounded by the fixing piles 21. A plurality of supporting devices 3 are provided, and the plurality of supporting devices 3 are arranged in a cross grid shape.

[0057] Reference Figure 5 The supporting device 3 includes a fixed tube 31. In this embodiment, the fixed tube 31 is preferably a hollow rectangular tube. The fixed tube 31 is horizontally arranged. Both ends of the fixed tube 31 are provided with sliding rods 32. The sliding rods 32 are penetrated through the inner cavity of the fixed tube 31, and the sliding rods 32 can slide along the axial direction of the fixed tube 31.

[0058] Reference Figure 5 The fixed tube 31 is provided with a driving assembly 33, which includes a driving rod 331, a first bevel gear 332, a second bevel gear 333 and a connecting rod 334. The driving rod 331 is located at the midpoint of the axial direction of the fixed tube 31, the driving rod 331 is vertically arranged, and the driving rod 331 is penetrated through the side wall of the fixed tube 31, the driving rod 331 is rotatably connected to the side wall of the fixed tube 31 by a bearing connection, the first bevel gear 332 is coaxially fixedly connected to the driving rod 331 by a key connection, the second bevel gear 333 is meshed with the first bevel gear 332, the second bevel gear 333 is coaxially arranged with the fixed tube 31, the second bevel gear 333 is rotatably connected to the fixed tube 31 by a bearing connection, and the second bevel gear 333 is coaxially fixedly connected to the fixed tube 31 by a key connection, the connecting rod 334 is coaxially arranged with the fixed tube 31, and the connecting rod 334 is rotatably connected to the fixed tube 31 by a bearing connection.

[0059] Reference Figure 5 A connecting piece is provided at one end of the driving rod 331 away from the first bevel gear 332. In this embodiment, the connecting piece can be connected to a power source and drive the driving rod 331 to rotate.

[0060] Reference Figure 5Each sliding rod 32 is provided with a driving member 34 in the inner cavity of the fixed tube 31, and the driving member 34 includes a worm 341, a worm wheel 342, a first gear 343 and a rack 344. The worm 341 is coaxially fixedly connected to the connecting rod 334 by a coupling connection. The worm wheel 342 is meshed with the worm 341 and rotates along the fixed tube 31 through the connecting shaft. The first gear 343 and the worm wheel 342 are coaxially fixedly connected. The long side direction of the rack 344 is parallel to the axial direction of the fixed tube 31. The rack 344 is meshed with the first gear 343, and the rack 344 is fixedly connected to the sliding rod 32 by welding.

[0061] Reference Figure 5 and Figure 6 , a locking device 4 is provided at one end of the sliding rod 32 away from the fixed tube 31. The locking device 4 includes a support block 41. In this embodiment, the support block 41 is preferably an isosceles triangle block. The symmetry axis of the support block 41 coincides with the axial direction of the sliding rod 32. Both side walls of the support block 41 are provided with a fitting assembly 42. The fitting assembly 42 includes a mounting rod 421 and a third spring 422. The connection point of the mounting rod 421 is located on the side of the support block 41 away from the sliding rod 32. One end of the mounting rod 421 is rotatably connected to the support block 41 by a torsion spring connection, and the other end is installed with a third spring 422. The two ends of the third spring 422 are respectively connected to the support block 41 and the mounting rod 421.

[0062] Reference Figure 5 and Figure 6 A plurality of fittings 43 are provided on the end surface of the mounting rod 421 away from the third spring 422. The plurality of fittings 43 are arranged at intervals along the long side direction of the mounting rod 421. The fittings 43 include an elastic rod 431 and a stop plate 432. The elastic rod 431 is arranged horizontally, and the elastic rod 431 is rotatably connected to the mounting rod 421 by a hinge seat connection. The stop plate 432 is rotatably connected to the elastic rod 431 by a hinge seat.

[0063] Reference Figure 5 and Figure 6 The end surface of the stop plate 432 away from the elastic rod 431 is provided with a stop pad 433. In this embodiment, the stop pad 433 has a certain friction effect, and the stop pad 433 is fixedly connected to the stop plate 432 by screw fixing. At the same time, the end surface of the stop pad 433 away from the stop plate 432 is a convex setting.

[0064] The implementation principle of a steel pipe pile foundation pit support water-stop cofferdam structure in an embodiment of the present application is: the operator first connects the fixed plate 111 in sequence according to the size of the foundation pit, and then rotates the adjusting bolt 122 to make the abutment block 123 slide along the fixing nail 121, and pushes the positioning rod 125 out of the fixing nail 121 to complete the fixation of the fixing plate 111.

[0065] The operator adjusts the position of the mounting plates 142 so that the plurality of mounting plates 142 can form a rectangular frame, and then slides the fixing pile 21 in the vertical direction, and the locking block 145 positions the fixing pile 21 .

[0066] The operator places the fixed tube 31 to a suitable position, and then rotates the driving rod 331 to change the direction of the driving torque through the first bevel gear 332 and the second bevel gear 333, thereby driving the worm 341 to rotate. The worm 341 is meshed with the worm wheel 342, and the worm wheel 342 drives the first gear 343 to rotate. The first gear 343 is meshed with the rack 344, driving the rack 344 to slide along the fixed tube 31 and push the sliding rod 32 out.

[0067] The rack 344 drives the support block 41 to fit the fixed pile 21 and abut against the fixed pile 21. At this time, the installation rod 421 rotates along the support block 41, and the third spring 422 can fix the angle between the installation rod 421 and the support block 41. At this time, the stop plate 432 fits the fixed pile 21 by changing the length of the elastic rod 431, and the stop pad 433 can fill the gap between the fixed pile 21 and the stop plate 432. The fixed pile 21 can support and stop water on the side wall of the foundation pit in different geographical environments.

[0068] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steel pipe pile foundation pit support water-stopping cofferdam structure, characterized in that: It comprises a fixed structure (1), a fixed pile (21) and a supporting device (3); The fixing structure (1) comprises a plurality of fixing plates (111), the fixing plates (111) are arranged along a foundation pit array, a plurality of mounting plates (142) are mounted on the fixing plates (111), and the mounting plates (142) are used to support the fixing piles (21); The support device (3) is located inside a structure enclosed by a plurality of the fixed piles (21) and is arranged in a mesh shape. The support device (3) comprises a fixed tube (31). Both ends of the fixed tube (31) are provided with sliding rods (32), and the sliding rods (32) can slide along the axial direction of the fixed tube (31). The end of the sliding rod (32) away from the fixed tube (31) is provided with a locking device (4), and the locking device (4) includes a support block (41), and the support block (41) and the sliding rod (32) are fixedly connected. The side walls of the support block (41) are provided with mounting rods (421), and the mounting rods (421) are elastically hinged to the support block (41) at the end of the support block (41) away from the sliding rod (32). The mounting rod (421) is provided with a plurality of fittings (43) at intervals, and the fittings (43) include an elastic rod (431) and a stop plate (432), and the two ends of the elastic rod (431) are respectively fixedly connected to the mounting rod (421) and the stop plate (432); Each of the sliding rods (32) is provided with a driving member (34), the driving member (34) comprising a worm (341), a worm wheel (342), a first gear (343) and a rack (344); the worm (341) and the sliding rod (32) have the same axial direction and are rotationally connected to the fixed tube (31); the worm wheel (342) and the worm (341) are meshed; the first gear (343) and the worm wheel (342) are coaxially fixedly connected; the first gear (343) and the rack (344) are meshed; the long side direction of the rack (344) is parallel to the axial direction of the sliding rod (32) and is fixedly connected to the sliding rod (32); The fixed tube (31) is provided with a driving assembly (33), and the driving assembly (33) comprises a driving rod (331), a first bevel gear (332) and a second bevel gear (333). The driving rod (331) is passed through the fixed tube (31) and is rotationally connected to the fixed tube (31). The first bevel gear (332) and the driving rod (331) are coaxially fixedly connected. The second bevel gear (333) and the first bevel gear (332) are meshed, and the second bevel gear (333) and the worm (341) are coaxially fixedly connected.

2. A steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 1, characterized in that: A stop pad (433) is provided on the end surface of the stop plate (432) away from the elastic rod (431), and the stop pad (433) and the stop plate (432) are fixedly connected.

3. A steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 1, characterized in that: A connecting piece is provided at one end of the driving rod (331) away from the first bevel gear (332), and the connecting piece is used to be connected to a driving source.

4. A steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 1, characterized in that: A sealing strip (23) is sandwiched between two adjacent fixing piles (21), and a waterproof pad (22) is sandwiched between the fixing pile (21) and the fixing plate (111).

5. The steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 1, characterized in that: The mounting plate (142) is centrally fixedly connected with a fixing block (143), and the fixing block (143) is evenly distributed with locking blocks (145) in the circumferential direction. The locking blocks (145) can slide in a direction approaching or moving away from the fixing block (143), and the locking blocks (145) can fit the inner wall of the fixing pile (21).

6. A steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 5, characterized in that: A slide groove (13) is provided on the top of the fixing plate (111), and the slide groove (13) is projected into a rectangle in the vertical direction, and the mounting plate (142) can slide along the slide groove (13).

7. The steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 1, characterized in that: The bottom wall of the fixing plate (111) is provided with a fixing nail (121), and the fixing nail (121) is coaxially provided with a fixing groove (124). The side wall of the fixing nail (121) is evenly distributed with a plurality of through grooves in the circumferential direction, and the fixing groove (124) is connected with the through groove. An abutment block (123) is provided in the fixing groove (124), and the abutment block (123) slides along the fixing groove (124). A positioning rod (125) is provided in each through groove and elastically slides along the through groove, and the end of the positioning rod (125) always abuts against the side wall of the abutment block (123).

8. The steel pipe pile foundation pit support water-stopping cofferdam structure according to claim 1, characterized in that: Each side wall of the fixing plate (111) is provided with a positioning groove (113) and a positioning block (112), and the positioning groove (113) is used to accommodate the positioning block (112).

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