A water stop structure capable of supporting a surrounding purlin and a construction method thereof

Abstract

The present invention provides a water-stopping structure capable of supporting walers and its construction method, addressing the problems of existing water-stopping curtains occupying construction space and damaging bored piles. It includes a water-stop steel pipe, a water-stop steel plate, and a waler support device. The water-stop steel plate is interlocked with the bored piles located on both sides. Multiple waler support devices are vertically installed on the side of the water-stop steel pipe facing the pit. The waler support device includes a connecting rod and a diagonal brace set along the axis of the water-stop steel pipe, and a support plate connected to both. One end of the connecting rod is fixed to the water-stop steel pipe, and the other end is movably connected to the support plate. The diagonal brace includes a bearing seat and a telescopic rod hinged to it. The other end of the telescopic rod abuts against the bottom of the support plate. Construction method: The water-stop steel pipe is pressed into the pit, and the water-stop steel plate is inserted into the holes of the bored piles on both sides. After the pit soil is excavated to the construction depth, the top ring beam or waler is supported by multiple waler support devices located on the same horizontal plane. This process is repeated to construct the walers and horizontal supports layer by layer.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support technology in geotechnical engineering, and in particular to a water-stopping structure capable of supporting walers and its construction method. Background Technology

[0002] In recent years, with the acceleration of urbanization and the increasing development and utilization of underground space, the depth of foundation pits has become deeper and deeper, and the construction requirements for foundation pit support structures have become higher and higher. They must not only meet the safety requirements during the deep foundation pit excavation process, but also have a certain degree of economic efficiency.

[0003] Currently, commonly used deep foundation pit support structures include sheet piles, construction piles, bored piles, and diaphragm walls. Among these, the foundation pit support system using "discrete bored piles + reinforced concrete / steel supports" has the following shortcomings:

[0004] 1. Since discrete cast-in-place piles do not have a water-stopping function, a separate water-stopping curtain (such as a triaxial mixing pile) is required to ensure the water-stopping effect during the deep foundation pit excavation process. The water-stopping curtain not only occupies a certain amount of construction space, but also affects the construction progress and increases the project cost.

[0005] 2. For reinforced concrete / steel supports, a top ring beam and walers are required between the bored pile and the support structure. During the construction of the top ring beam, the overlapping portion of the bored pile and the top ring beam is roughened to expose the main reinforcement. The top ring beam is then erected on top of the bored pile and integrated with its concrete pouring. During the construction of the walers, the concrete at the corresponding location of the bored pile is removed until the main reinforcement or embedded steel plate is exposed. Tie bars or steel brackets are welded to the main reinforcement or embedded steel plate of the bored pile, and the walers are then connected to one side of the bored pile using tie bars or waler supports. This construction method not only compromises the integrity of the bored pile but also makes the exposed main reinforcement or embedded steel plate susceptible to corrosion, reducing the strength of the bored pile. Summary of the Invention

[0006] In existing foundation pit support systems consisting of discrete bored piles and reinforced concrete / steel supports, the water-stop curtain occupies construction space, affecting construction progress. Furthermore, the connection points between the bored piles and the top ring beam and walers are damaged, reducing the strength of the bored piles. The purpose of this invention is to provide a water-stop structure capable of supporting the walers and its construction method.

[0007] The technical solution adopted by this invention to solve its technical problem is: a water-stopping structure capable of supporting walers, comprising a water-stopping steel pipe, water-stopping steel plates vertically arranged on both sides of the water-stopping steel pipe, and multiple waler supporting devices. The water-stopping steel pipe is arranged between two adjacent bored piles, and the water-stopping steel plates on both sides of the water-stopping steel pipe are respectively engaged with the bored piles located on both sides. The tops of the bored piles, water-stopping steel pipe, and water-stopping steel plates are all flush with the outdoor ground level. The side of each water-stopping steel pipe near the foundation pit is vertically spaced along its axial direction. Multiple waler support devices are installed, the number and position of which correspond to the actual number and position of the top ring beam and walers in the foundation pit. Each waler support device includes a connecting rod, a diagonal brace, and a support plate. The connecting rod and diagonal brace are vertically and spaced apart along the axis of the waterstop steel pipe. One end of the connecting rod is vertically fixed to the waterstop steel pipe, and the other end is movably connected to the support plate. The diagonal brace includes a bearing seat and a telescopic rod hinged to it. The other end of the telescopic rod abuts against the bottom of the support plate. The waler support device is used to support the top ring beam and walers in the foundation pit.

[0008] The present invention provides a water-stopping structure capable of supporting walers, comprising a water-stopping steel pipe, water-stopping steel plates, and multiple waler support devices. The water-stopping steel plates on both sides of the water-stopping steel pipe are respectively engaged with bored piles located on both sides. Multiple waler support devices are vertically and spaced apart on the pit-facing side of the water-stopping steel pipe. Each waler support device includes connecting rods and diagonal braces vertically and spaced apart along the axis of the water-stopping steel pipe, and support plates respectively connected to both. One end of the connecting rod is vertically fixed to the water-stopping steel pipe, and the other end is movably connected to the support plate. The diagonal brace includes a bearing seat and a telescopic rod hinged to it, with the other end of the telescopic rod abutting against the bottom of the support plate. This water-stopping structure has at least the following beneficial effects:

[0009] 1. A water-stopping structure with waler support device is inserted between adjacent discrete bored piles to form a foundation pit support system that integrates water-stopping and waler support. For discrete foundation pit support structures with water interception requirements, there is no need to set up a separate water-stopping curtain, avoiding the water-stopping curtain from occupying underground construction space. This not only ensures the water-stopping effect of the foundation pit support system, but also effectively reduces project costs and shortens the construction period, which is beneficial for the construction of foundation pit support structures in confined land space.

[0010] Second, multiple waler support devices are vertically installed on the side of the water-stop steel pipe. The number and position of the waler support devices are determined according to the actual number and position of the top ring beam and walers in the foundation pit. This ensures that the top ring beam and multiple walers in the foundation pit can be stably supported by the waler support devices on one side of the water-stop structure. There is no need to remove the concrete on the top and side of the bored pile, and there is no need to install hangers, corbels, or other structures to weld to the bored pile. This not only ensures the integrity of the bored pile structure, but also realizes the prefabricated construction of the foundation pit support system, improves construction efficiency, shortens the construction cycle, and has good economy and safety.

[0011] Third, the connecting rods, telescopic rods, and support plates of the waler support device are all movable connections, and the telescopic rods and waterstop steel pipes are hinged connections. This facilitates the smooth pressing of the waterstop steel pipes, along with some components of the waler support device, into the foundation pit soil. After the foundation pit soil is excavated to the appropriate depth for the installation of the top ring beam or waler, the support plate 38 is installed at the ends of the connecting rods and telescopic rods, making operation more convenient. Moreover, the waterstop structure can be removed and recycled, saving project costs and causing less environmental pollution, thus achieving green construction.

[0012] Furthermore, the connecting rod of the waler support device consists of two horizontally arranged screws, screw one and screw two, with their axes coincident, and a sleeve that is fitted and threaded to the outside of screw one and screw two. The length of the sleeve is equal to the distance between the water-stop steel pipe and the waler. Screw one is vertically fixed to the water-stop steel pipe. The sleeve is fitted and threaded to screw one. One end of screw two is screwed into the sleeve and abuts against screw one. The length of screw two that is not screwed into the sleeve is equal to the depth of the internal threaded hole of the support plate. The other end of screw two is threaded to the support plate.

[0013] Furthermore, the telescopic rod of the diagonal brace consists of a sleeve hinged to the bearing seat and a support rod embedded in the sleeve, with the top end of the support rod abutting against the support plate; or, the telescopic rod of the diagonal brace consists of a hydraulic cylinder hinged to the bearing seat and a piston rod slidably connected to the hydraulic cylinder, with the other end of the piston rod abutting against the bottom of the support plate.

[0014] Furthermore, the top of the telescopic rod is also connected to a support plate, which also includes a groove plate with an L-shaped cross-section located on its edge away from the waterstop steel pipe, and the support plate is snapped into the groove formed by the groove plate.

[0015] Furthermore, the waler support device also includes multiple pressure sensors disposed on the four sides of the pallet, as well as an intelligent control system. The intelligent control system is connected to the pressure sensors and the hydraulic cylinder signals of the telescopic rod, respectively. The pressure sensors are used to monitor the pressure data of the pallet in real time and transmit it to the intelligent control system.

[0016] Furthermore, the cross-section of the water-stop steel plate is T-shaped, and both sides of the bored pile are provided with sockets. Each socket is composed of two symmetrical and spaced L-shaped steel plates. One end of the two L-shaped steel plates is welded to the reinforcing cage of the bored pile, and the gap between the other ends of the two L-shaped steel plates is equal to the thickness of the web of the water-stop steel plate. The web of the water-stop steel plate passes through the gap between the two L-shaped steel plates, and the flange of the water-stop steel plate is snapped into the socket, so that the water-stop structure can be interlocked with the adjacent discrete bored piles on both sides.

[0017] Further, it further includes rubber waterstops symmetrically arranged on both sides of the web of the waterstop steel plate. The cross-section of the rubber waterstop is in a "person" shape. Grooves are provided on both sides of the web of the waterstop steel plate. The clamping strip at one end of the rubber waterstop is buckled in the groove, and the ends of the two legs at the other end respectively abut against the inner corner of the socket L-shaped steel plate and the included angle between the flange plate of the waterstop steel plate and the L-shaped steel plate.

[0018] In addition, the present invention also provides a construction method for a waterstop structure capable of supporting the collar beam, and the steps are as follows:

[0019] S1: Along the axis direction of the waterstop steel pipe, at least the screw rod one including the connecting rod of multiple collar beam supporting devices and the bearing seat of the diagonal brace are welded and connected to one side of the waterstop steel pipe, and the number and positions of the multiple collar beam supporting devices correspond to the number and positions of the actual top ring beam and collar beams. The waterstop steel plates on both sides of the waterstop steel pipe are respectively inserted into the sockets of the adjacent bored cast-in-place piles on both sides, and the waterstop structure is pressed into the foundation pit soil body to the depth required by the construction.

[0020] S2: After the foundation pit soil body is excavated to the corresponding depth suitable for the construction of the top ring beam or collar beam, the sleeve is sleeved and threadedly connected to the screw rod one. One end of the screw rod two is screwed into the sleeve and abuts against the screw rod one, and the other end is screwed into the bottom of the threaded hole of the supporting plate. The bottom end of the telescopic rod is connected to the bearing seat, and its top end supports the bottom of the supporting plate. The top ring beam or collar beam is supported by multiple collar beam supporting devices located on the same horizontal plane. Repeating this way, the top ring beam, collar beam and horizontal support are constructed layer by layer from top to bottom.

[0021] The present invention discloses a construction method for a water-stop structure capable of supporting walers. A water-stop steel pipe is pressed into the foundation pit, and water-stop steel plates on both sides of the pipe are inserted into the sockets of two adjacent bored piles. After the foundation pit is excavated to a suitable depth for the construction of the top ring beam or waler, the top ring beam or waler is supported by multiple waler support devices located on the same horizontal plane. This process is repeated, constructing the walers and horizontal supports layer by layer from top to bottom. By inserting water-stop structures equipped with waler support devices between discrete bored piles, a concentrated water-stop structure is formed. The integrated water-sealing and waler support system eliminates the need for a separate water-stop curtain for discrete foundation pit retaining structures with water interception requirements. This avoids the water-stop curtain occupying construction space, ensuring the water-stopping effect of the foundation pit support system while effectively reducing project costs and shortening the construction period. It is also beneficial for the construction of foundation pit retaining structures in confined spaces. The number and location of the waler support devices are determined according to the actual number and location of the top ring beams and walers within the foundation pit, ensuring stable support from the top ring beams and multiple walers. The waler support device on one side of the water-stop structure eliminates the need to remove the concrete from the top and sides of the bored pile, and eliminates the need for welding connections between the bored pile and structures such as hangers or corbels. This not only ensures the integrity of the bored pile structure but also enables prefabricated construction of the foundation pit support system, improving construction efficiency, shortening the construction cycle, and offering good economic and safety benefits. The connecting rods, telescopic rods, and support plates of the waler support device are all movable connections, while the telescopic rods are hinged to the water-stop steel pipe, facilitating the water-stop structure. The structure, along with some components of the waler support device, was successfully pressed into the foundation pit soil. After the foundation pit soil was excavated to the appropriate depth for the installation of the top ring beam or waler, the support plate was installed at the ends of the connecting rod and the telescopic rod, making the operation more convenient. Moreover, since the top ring beam, waler, and horizontal support are supported in the foundation pit by the waler support device, the later dismantling is convenient and quick, avoiding secondary damage to the bored piles. The water-stop structure after dismantling can be recycled and reused, saving project costs and causing less environmental pollution, thus achieving green construction.

[0022] Furthermore, step S1 also includes, after lowering the reinforcing cage of the bored pile into the borehole and before pouring concrete, pre-embedding bottom-sealed filler blocks in the two insertion holes on the side of the spiral stirrups of the reinforcing cage, setting "C-shaped" slots on both sides of the filler blocks, and using the slots to fasten the top of the filler blocks to the insertion holes; embedding the clip at one end of the rubber waterstop into the groove of the web of the waterstop steel plate, and the two forked ends of the other end of the rubber waterstop abutting against the inside corner of the L-shaped steel plate of the insertion hole and the included angle between the flange of the waterstop steel plate and the L-shaped steel plate.

[0023] Furthermore, step S2 also includes setting a pressure sensor on each of the four sides of the bottom of the support plate of each waler support device located at the same elevation, and the pressure sensors are all connected to the intelligent control system to monitor the pressure data of the support plates located at the same elevation in real time and transmit it to the intelligent control system. When the pressure value of the support plate of a certain waler support device or a certain side of the support plate changes abruptly, the intelligent control system automatically drives the hydraulic structure of the corresponding telescopic rod to realize automatic compensation of the support axial force, so that the pressure values ​​on the four sides of the support plate are equal, and ensure that the support plates of multiple waler support devices are on the same horizontal plane. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a waler support device in one embodiment of the water-stopping structure capable of supporting the waler according to the present invention;

[0025] Figure 2 This is a top view of a waler support device according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the water-stop steel plate in one embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of a rubber waterstop in one embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of one side of the insertion port of a bored pile in one embodiment of the present invention.

[0029] Figure 6 This is an exploded view of the telescopic rod and bearing seat in one embodiment of the present invention;

[0030] Figure 7 This is an exploded view of the connecting rod in one embodiment of the present invention;

[0031] Figure 8 This is a front view of the water-stopping structure in one embodiment of the present invention;

[0032] Figures 9 to 11 This is a schematic diagram of each step in the construction method of the waterstop structure capable of supporting the waler according to the present invention;

[0033] Figure 12 for Figure 11 AA sectional view.

[0034] The numbers in the diagram are as follows:

[0035] 1. Top ring beam; 2. First horizontal support; 3. First waler; 5. Second waler; 4. Second horizontal support; 6. Third horizontal support; 10. Drilled pile; 12. L-shaped steel plate; 14. Filler block; 15. Groove; 21. Waterstop steel pipe; 24. Waterstop steel plate; 24. Web plate; 245. Flange plate; 246. Groove; 25. Rubber waterstop strip; 251. Clip; 252. Waler support device; 30. Screw 1; 32. Screw 2; 34. Sleeve; 35. Bearing seat; 36. Sleeve; 37. Support rod; 38. Support plate; 38a. Groove plate; 38b. Internal threaded hole; 39. Support plate; 40. Pressure sensor. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clearly illustrate the embodiments of the present invention. For ease of description, the terms "upper" and "lower" used below are consistent with the upper and lower directions in the drawings, but this should not be construed as a limitation of the technical solution of the present invention.

[0037] This embodiment takes the construction of a foundation pit support system as an example. The inner side of the support structure is equipped with a top ring beam 1, a first waler 3, and a second waler 5 arranged at intervals from top to bottom. Three horizontal supports are correspondingly installed inside the foundation pit from top to bottom. The first horizontal support 2 is connected to the top ring beam 1, the second horizontal support 4 is connected to the first waler 3, and the third horizontal support 6 is connected to the second waler 5. The following is a combination of... Figures 1 to 8This invention describes a water-stopping structure capable of supporting walers, comprising: a water-stopping steel pipe 21, water-stopping steel plates 24 vertically arranged on both sides of the water-stopping steel pipe 21, and multiple waler supporting devices 30. The net distance between two adjacent bored piles 10 meets the specifications and calculation requirements. The water-stopping steel pipe 21 is positioned between two adjacent bored piles 10. The water-stopping steel plates 24 on both sides of the water-stopping steel pipe 21 are respectively engaged with the bored piles 10 located on both sides. The tops of the bored piles 10, the water-stopping steel pipe 21, and the water-stopping steel plates 24 are all flush with the outdoor ground level. The side of each water-stopping steel pipe 21 closest to the foundation pit is... Multiple waler support devices 30 are arranged vertically and at intervals along the axial direction. The number and position of the waler support devices 30 correspond to the actual number and position of the top ring beam and walers in the foundation pit. Each waler support device 30 includes a connecting rod, a diagonal brace, and a support plate 38. The connecting rod and the diagonal brace are arranged vertically and at intervals along the axis of the waterstop steel pipe 21. One end of the connecting rod is vertically fixed to the waterstop steel pipe 21, and the other end is movably connected to the support plate 38. The diagonal brace includes a bearing seat 35 and a telescopic rod hinged to it. The other end of the telescopic rod abuts against the bottom of the support plate 38. The waler support device 30 is used to support the top ring beam and walers in the foundation pit. In this embodiment, the width of the support plate 38 should be adapted to the width of the top ring beam or waler, and the length of the support plate 38 should be greater than or equal to the width of the horizontal support. Since the water-stop steel pipe 21 and the water-stop steel plate 24 do not need to bear the soil pressure outside the pit, their length only needs to meet the water-stopping requirements, and is not limited here.

[0038] The water-stopping structure of the present invention, capable of supporting walers, includes a water-stopping steel pipe 21, a water-stopping steel plate 24, and a plurality of waler supporting devices 30. The water-stopping steel plates 24 on both sides of the water-stopping steel pipe 21 are respectively engaged and connected to the bored piles 10 located on both sides. The plurality of waler supporting devices 30 are vertically and spaced apart on the pit-facing side of the water-stopping steel pipe 21. Each waler supporting device 30 includes a connecting rod and a diagonal brace vertically and spaced apart along the axis of the water-stopping steel pipe 21, and a supporting plate 38 connected to both. One end of the connecting rod is vertically fixed to the water-stopping steel pipe 21, and the other end is movably connected to the supporting plate 38. The diagonal brace includes a bearing seat 35 and a telescopic rod hinged thereto. The other end of the telescopic rod abuts against the bottom of the supporting plate 38. This water-stopping structure has at least the following beneficial effects:

[0039] 1. A water-stopping structure with a waler support device 30 is inserted between adjacent discrete bored piles 10 to form a foundation pit support system that integrates water-stopping and waler support. For discrete foundation pit support structures with water interception requirements, there is no need to set up a separate water-stopping curtain, avoiding the water-stopping curtain from occupying underground construction space. This not only ensures the water-stopping effect of the foundation pit support system, but also effectively reduces project costs and shortens the construction period, which is beneficial to the construction of foundation pit support structures in confined land space.

[0040] Second, multiple waler support devices 30 are vertically installed on the side of the water-stop steel pipe 21. The number and position of the waler support devices 30 are determined according to the actual number and position of the top ring beam 1 and walers in the foundation pit. This ensures that the top ring beam 1 and multiple walers in the foundation pit can be stably supported by the waler support devices 30 on one side of the water-stop structure. There is no need to remove the concrete on the top and side of the bored pile 10, and there is no need to install hanging bars, corbels and other structures to weld to the bored pile 10. This not only ensures the integrity of the bored pile 10 structure, but also realizes the prefabricated construction of the foundation pit support system, improves construction efficiency, shortens the construction cycle, and has good economy and safety.

[0041] Third, the connecting rods, telescopic rods, and support plates 38 of the waler support device 30 are all movable connections, and the telescopic rods and the water-stop steel pipe 21 are hinged connections. This facilitates the smooth pressing of the water-stop steel pipe 21, along with some components of the waler support device 30, into the foundation pit soil. After the foundation pit soil is excavated to the appropriate depth for the installation of the top ring beam 1 or the waler, the support plates 38 are installed at the ends of the connecting rods and telescopic rods, making the operation more convenient. Moreover, the water-stop structure can be dismantled and recycled, saving project costs and causing less environmental pollution, thus achieving green construction.

[0042] like Figure 1 and Figure 2 As shown, the connecting rod of the waler support device 30 consists of a horizontally arranged screw 31 and a screw 32 with their axes coincident, and a sleeve 34 that is sleeved and threaded to the outside of the screw 31 and the screw 32. The length of the sleeve 34 is equal to the distance between the water-stop steel pipe 21 and the waler. The screw 31 is vertically fixed to the water-stop steel pipe 21. The sleeve 34 is sleeved and threaded to the screw 31. One end of the screw 32 is screwed into the sleeve 34 and abuts against the screw 31. The length of the screw 32 that is not screwed into the sleeve 34 is equal to the depth of the internal threaded hole 38b of the support plate 38. The other end of the screw 32 is threaded to the support plate 38. In this embodiment, the inner diameter of the sleeve 34 is the same as the outer diameter of the screw 1 31 and the screw 2 32. The length of the screw 2 32 is greater than the length of the screw 1 31. The length of the sleeve 34 is greater than or equal to the sum of the length of the screw 1 31 and half the length of the screw 2 32. During installation, the screw 1 31 is first vertically welded to the side of the waterstop steel pipe 21. The sleeve 34 is then fitted and threaded onto the screw 1 31 and pressed into the foundation pit soil along with the waterstop steel pipe 21. After the foundation pit soil is excavated to the appropriate depth suitable for the construction of the top ring beam 1 or the waler, one end of the screw 2 32 is screwed into the sleeve 34, and the other end is screwed into the bottom of the internal threaded hole 38b of the support plate 38, so that the support plate 38 can be movably connected to the connecting rod and the support plate 38 can be accurately positioned.

[0043] like Figure 1 and Figure 2As shown, the telescopic rod of the diagonal brace consists of a sleeve 36 hinged to the bearing housing 35 and a support rod 37 embedded in the sleeve 36. The top end of the support rod 37 abuts against the support plate 38. During installation, the bearing housing 35 is first welded to the side of the waterstop steel pipe 21 and pressed into the foundation pit soil along with the waterstop steel pipe 21. After the foundation pit soil is excavated to the appropriate depth suitable for the construction of the top ring beam 1 or the waler, one end of the support rod 37 is installed on the bearing housing 35, and the other end is supported on the bottom of the support plate 38. In another embodiment, the telescopic rod of the diagonal brace consists of a hydraulic cylinder hinged to the bearing housing 35 and a piston rod slidably connected to the hydraulic cylinder. The other end of the piston rod abuts against the bottom of the support plate 38. By adjusting the length of the support rod 37 or the telescopic rod, the top end of the support rod 37 or the telescopic rod is made to be on the same horizontal plane as the connecting rod, ensuring that the support plate 38 can remain horizontal after installation.

[0044] like Figure 6 As shown, the bearing housing 35 includes a base and a pin fixed between two lugs of the base. One end of the telescopic rod is provided with a through hole that matches the pin. The pin passes through the through hole at the end of the telescopic rod and is inserted into the bearing housing 35, so that the telescopic rod can be hinged to the base, making installation and disassembly convenient and quick.

[0045] like Figure 6 and Figure 7 As shown, in order to prevent the support plate 38 from falling, the top of the telescopic rod is also connected to a support plate 39. The support plate 38 also includes a groove plate 38a with an L-shaped cross-section, which is set on the edge away from the waterstop steel pipe 21. The size of the support plate 39 is much smaller than the size of the support plate 38, but larger than the outer diameter of the support rod 37 or piston rod of the telescopic rod, and the support plate 39 is snapped into the groove 15 formed by the groove plate 38a.

[0046] like Figure 3 and Figure 5 As shown, the cross-section of the water-stop steel plate 24 is T-shaped. Both sides of the bored pile 10 are provided with sockets. Each socket is composed of two symmetrical and spaced L-shaped steel plates 12. One end of the two L-shaped steel plates 12 is welded to the reinforcing cage 11 of the bored pile 10. The gap between the other ends of the two L-shaped steel plates 12 is equal to the thickness of the web 241 of the water-stop steel plate 24. The web 241 of the water-stop steel plate 24 passes through the gap between the two L-shaped steel plates 12. The flange 245 of the water-stop steel plate 24 is snapped into the socket, so that the water-stop structure 20 can be engaged and connected with the adjacent discrete bored piles 10 on both sides.

[0047] like Figure 2 , Figure 4 and Figure 12As shown, the water-stopping structure capable of supporting the waler also includes rubber waterstop strips 25 symmetrically arranged on both sides of the web 241 of the waterstop steel plate 24. The cross-section of the rubber waterstop strip 25 is "V" shaped. Grooves 246 are provided on both sides of the web 241 of the waterstop steel plate 24. The retaining strip 251 at one end of the rubber waterstop strip 25 is fastened to the groove 246, and the ends of the two supporting legs 252 at the other end abut against the inside corner of the L-shaped steel plate 12 and the included angle between the flange 245 of the waterstop steel plate 24 and the L-shaped steel plate 12, respectively. The rubber waterstop strip 25, the L-shaped steel plate 12 of the socket, and the waterstop steel plate 24 together form a closed space. Grouting can be performed on the gaps later to form a multi-layer water-stopping system, increasing the water seepage path and improving the water-stopping effect.

[0048] Furthermore, such as Figure 7 As shown, the waler support device 30 also includes multiple pressure sensors 40 disposed on the four sides of the support plate 39, and an intelligent control system. The intelligent control system is connected to the pressure sensors 40 and the hydraulic cylinder signal of the telescopic rod, respectively. The pressure sensors 40 are used to monitor the pressure data of the support plate 39 in real time and transmit it to the intelligent control system. When the pressure value on one side of the support plate 39 changes abruptly, the intelligent control system automatically drives the hydraulic structure of the telescopic rod to extend and retract to realize automatic compensation of the support axial force, so that the pressure values ​​on the four sides of the support plate 39 are equal, ensuring the stability of the support plate 38.

[0049] Combination Figures 9 to 11 The construction method of the water-stop structure capable of supporting the waler according to the present invention is described in the following specific steps:

[0050] S1: As Figure 9 As shown, along the axial direction of the waterstop steel pipe 21, the screw rod 31, which includes at least the connecting rod, and the bearing seat 35 of the diagonal brace of the multiple waler support devices 30 are welded to one side of the waterstop steel pipe 21. The number and position of the multiple waler support devices 30 correspond to the actual number and position of the top ring beam 1 and the walers. The waterstop steel plates 24 on both sides of the waterstop steel pipe 21 are inserted into the sockets of the adjacent bored piles 10 on both sides, and the waterstop structure 20 is pressed into the foundation pit soil to the depth required for construction.

[0051] S2: As Figure 10 and Figure 11 As shown, after the foundation pit is excavated to the appropriate depth for the construction of the top ring beam 1 or the waler, the sleeve 34 is fitted and threaded to the screw rod 31. One end of the screw rod 32 is screwed into the sleeve 34 and abuts against the screw rod 31, while the other end is screwed into the bottom of the threaded hole in the support plate 38. The bottom end of the telescopic rod is connected to the bearing seat 35, and its top end is supported on the bottom of the support plate 38. The top ring beam 1 or the waler is supported on multiple waler support devices 30 located on the same horizontal plane. This process is repeated, and the top ring beam 1, the waler and the horizontal support are constructed layer by layer from top to bottom.

[0052] The construction method of the water-stop structure capable of supporting the waler of the present invention involves pressing a water-stop steel pipe 21 into the foundation pit, and inserting water-stop steel plates 24 on both sides of the water-stop steel pipe 21 into the sockets of two adjacent bored piles 10. After the foundation pit soil is excavated to the appropriate depth for the construction of the top ring beam 1 or the waler, the top ring beam 1 or the waler is supported by multiple waler support devices 30 located on the same horizontal plane. This process is repeated, with the waler and horizontal support constructed layer by layer from top to bottom. By inserting a water-stop structure equipped with waler support devices 30 between the discrete bored piles 10, This forms a foundation pit support system integrating water-stopping and waler support. For discrete foundation pit retaining structures with water-stopping requirements, there is no need to install a separate water-stop curtain, avoiding the water-stop curtain occupying construction space. This ensures the water-stopping effect of the foundation pit support system, effectively reduces project costs, shortens the construction period, and is beneficial for the construction of foundation pit retaining structures in confined land spaces. The number and position of the waler support devices 30 are determined according to the actual number and position of the top ring beam 1 and walers in the foundation pit, so that the top ring beam 1 and multiple walers in the foundation pit can be stably supported by the water-stop curtain. The waler support device 30 on one side of the water structure eliminates the need to remove the concrete from the top and sides of the bored pile 10, and eliminates the need for welding connections between the bored pile 10 and structures such as hangers or corbels. This not only ensures the structural integrity of the bored pile 10, but also enables prefabricated construction of the foundation pit support system, improving construction efficiency, shortening the construction cycle, and offering good economic efficiency and safety. The connecting rods and telescopic rods of the waler support device 30 are all movable connections to the support plate 38, while the telescopic rods are hinged to the water-stop steel pipe 21, facilitating water stopping. The structure, along with some components of the waler support device 30, was successfully pressed into the foundation pit soil. After the foundation pit soil was excavated to the appropriate depth for the installation of the top ring beam 1 or the waler, the support plate 38 was installed at the ends of the connecting rod and the telescopic rod, making the operation more convenient. Moreover, since the top ring beam 1, the waler, and the horizontal support are supported in the foundation pit by the waler support device 30, the subsequent dismantling is convenient and quick, avoiding secondary damage to the bored pile 10. The water-stop structure after dismantling can be recycled and reused, saving project costs and causing less environmental pollution, thus achieving green construction.

[0053] Step S1 also includes, for example Figure 5As shown, after the reinforcing cage of the bored pile 10 is lowered into the borehole and before the concrete is poured, a bottom-sealed filler block 14 is pre-embedded in the two slots on the side of the spiral stirrup of the reinforcing cage. The width of the filler block 14 is less than or equal to the width of the L-shaped steel plate to prevent the inner cavity enclosed by the slot from being completely filled with concrete, which would make it difficult to insert the water-stop steel plate 24 later. Moreover, in order to prevent the filler block 14 from being raised by the concrete during the concrete pouring process of the bored pile 10, "C-shaped" slots 15 are set on both sides of the filler block 14. The top of the filler block 14 is locked into the slot through the slots 15. The spacing of the slots 15 is slightly less than or equal to the sum of the thickness of the filler block 14 and the thickness of the L-shaped steel plate 12. After the concrete of the bored pile 10 is poured and reaches the design strength, the slots 15 are removed and the filler block 14 is pulled out. To facilitate the smooth removal of the filler block 14 later, an oil film can be pre-coated on the surface of the filler block 14. In this embodiment, the filling block 14 is preferably made of a rectangular plastic tube, and the slot 15 is preferably made of a wooden wedge. Of course, this is just an example and is not limited to this.

[0054] Step S1 also includes, for example Figure 2 , Figure 4 and Figure 12 As shown, the retaining strip 251 at one end of the rubber waterstop 25 is embedded into the groove 246 of the web plate 241 of the waterstop steel plate 24. The ends of the two forked legs 252 at the other end of the rubber waterstop 25 are respectively aligned with the inside corner of the L-shaped steel plate 12 and the included angle between the flange of the waterstop steel plate 24 and the L-shaped steel plate 12. The rubber waterstop 25, the L-shaped steel plate 12 of the socket and the waterstop steel plate 24 together form a closed space. Grouting can be performed on the gaps later to form a multi-layer waterstop system, which increases the water seepage path and improves the waterstop effect.

[0055] Step S2 also includes, for example Figure 7 As shown, each waler support device 30 located at the same elevation has a pressure sensor 40 installed on each of the four sides of the bottom of the support plate 39. The pressure sensors 40 are all connected to the intelligent control system to monitor the pressure data of the support plate 39 located at the same elevation in real time and transmit it to the intelligent control system. When the pressure value of the support plate 39 of a certain waler support device 30, or a certain side of the support plate 39, suddenly changes, the intelligent control system automatically drives the hydraulic structure of the corresponding telescopic rod to realize automatic compensation of the support axial force, so that the pressure values ​​on the four sides of the support plate 39 are equal, and ensure that the support plates 38 of multiple waler support devices 30 are on the same horizontal plane, thereby providing stable support for the waler.

[0056] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the claims.

Claims

1. A water-stopping structure capable of supporting walers, characterized in that, Including: A water-stop steel pipe, water-stop steel plates vertically arranged on both sides of the water-stop steel pipe, and multiple waling support devices. The water-stop steel pipe is arranged between two adjacent bored cast-in-place piles. The water-stop steel plates on both sides of the water-stop steel pipe are respectively connected in an interlocking manner with the bored cast-in-place piles on their two sides. On the side of each water-stop steel pipe close to the foundation pit, multiple waling support devices are vertically and spaced along its axial direction. The quantity and positions of the waling support devices correspond to the quantity and positions of the actual top ring beam and waling in the foundation pit. The waling support device includes a connecting rod, a diagonal brace and a supporting plate. The connecting rod and the diagonal brace are vertically and spaced along the axis of the water-stop steel pipe. One end of the connecting rod is vertically fixed to the water-stop steel pipe, and the other end is movably connected to the supporting plate. The diagonal brace includes a bearing seat and a telescopic rod hinged thereto. The other end of the telescopic rod abuts against the bottom of the supporting plate. The waling support device is used to support the top ring beam and waling in the foundation pit; The connecting rod of the waling support device consists of a first screw rod and a second screw rod which are horizontally arranged and have the same axis, and a sleeve sleeved and threadedly connected to the outside of the first screw rod and the second screw rod. The length of the sleeve is equal to the distance between the water-stop steel pipe and the waling. The first screw rod is vertically fixed to the water-stop steel pipe. The sleeve is sleeved and threadedly connected to the first screw rod. One end of the second screw rod is screwed into the sleeve and abuts against the first screw rod. The length of the second screw rod not screwed into the sleeve is equal to the depth of the internal threaded hole of the supporting plate. The other end of the second screw rod is threadedly connected to the supporting plate.

2. The water-stopping structure capable of supporting the waler according to claim 1, characterized in that: The telescopic rod of the diagonal brace consists of a sleeve hinged to the bearing seat and a support rod embedded in the sleeve. The top end of the support rod abuts against the supporting plate; or the telescopic rod of the diagonal brace consists of a hydraulic cylinder hinged to the bearing seat and a piston rod slidably connected to the hydraulic cylinder. The other end of the piston rod abuts against the bottom of the supporting plate.

3. The water-stopping structure capable of supporting the waler according to claim 1, characterized in that: A supporting plate is further connected to the top end of the telescopic rod. The supporting plate further includes a channel plate arranged on the edge on the side away from the water-stop steel pipe and having an L-shaped cross section, and the supporting plate is buckled in the card slot formed by the channel plate.

4. The water-stopping structure capable of supporting the waler according to claim 3, characterized in that: The waling support device further includes multiple pressure sensors arranged on the four sides of the supporting plate, and an intelligent control system. The intelligent control system is respectively in signal connection with the pressure sensors and the hydraulic cylinder of the telescopic rod. The pressure sensors are used to monitor the pressure data of the supporting plate in real time and transmit it to the intelligent control system.

5. The water-stopping structure capable of supporting the waler according to claim 1, characterized in that: The cross section of the water-stop steel plate is T-shaped. Sockets are arranged on both sides of the bored cast-in-place pile. Each socket consists of two symmetrically and spaced L-shaped steel plates. One ends of the two L-shaped steel plates are welded to the bored cast-in-place pile reinforcement cage. The gap between the other ends of the two L-shaped steel plates is equal to the thickness of the web of the water-stop steel plate. The web of the water-stop steel plate passes through the gap between the two L-shaped steel plates, and the flange plate of the water-stop steel plate is buckled in the socket, so that the water-stop structure can be connected in an interlocking manner with the adjacent discrete bored cast-in-place piles on both sides.

6. The water-stopping structure capable of supporting the waler according to claim 1, characterized in that: It further includes rubber water-stop belts symmetrically arranged on both sides of the web of the water-stop steel plate. The cross section of the rubber water-stop belt is "human" shaped. Grooves are arranged on both sides of the web of the water-stop steel plate. A clamping strip at one end of the rubber water-stop belt is buckled in the groove, and the two ends of the other end of the rubber water-stop belt respectively abut against the internal corner of the L-shaped steel plate of the socket and the included angle between the flange plate of the water-stop steel plate and the L-shaped steel plate.

7. The construction method of the waterstop structure capable of supporting the waler as described in any one of claims 1 to 6, characterized in that, The steps are as follows: S1: Along the axis of the waterstop steel pipe, weld at least one screw rod including the connecting rod and the bearing seat of the diagonal brace of multiple waler support devices to one side of the waterstop steel pipe, and the number and position of multiple waler support devices correspond to the actual number and position of the top ring beam and walers. Insert the waterstop steel plates on both sides of the waterstop steel pipe into the sockets of the adjacent bored piles on both sides, and press the waterstop structure into the foundation pit soil to the depth required for construction. S2: After the foundation pit is excavated to the appropriate depth for the construction of the top ring beam or waler, the sleeve is fitted and threaded to the screw rod one. One end of the screw rod two is screwed into the sleeve and abuts against the screw rod one. The other end is screwed into the bottom of the threaded hole in the support plate. The bottom end of the telescopic rod is connected to the bearing seat, and its top end is supported on the bottom of the support plate. The top ring beam or waler is supported by multiple waler support devices located on the same horizontal plane. This process is repeated, and the top ring beam, waler and horizontal support are constructed layer by layer from top to bottom.

8. The construction method of the waterstop structure capable of supporting the waler according to claim 7, characterized in that: Step S1 further includes, after lowering the reinforcing cage of the bored pile into the borehole and before pouring concrete, pre-embedding bottom-sealed filler blocks in the two insertion holes on the side of the spiral stirrups of the reinforcing cage, setting "C-shaped" slots on both sides of the filler blocks, and using the slots to fasten the top of the filler blocks to the insertion holes; embedding the clip at one end of the rubber waterstop into the groove of the web of the waterstop steel plate, and the two forked ends of the other end of the rubber waterstop abutting against the inside corner of the L-shaped steel plate of the insertion hole and the included angle between the flange of the waterstop steel plate and the L-shaped steel plate.

9. The construction method of the waterstop structure capable of supporting the waler according to claim 7, characterized in that: Step S2 further includes setting a pressure sensor on each of the four sides of the bottom of the support plate of each waler support device located at the same elevation. The pressure sensors are all connected to the intelligent control system to monitor the pressure data of the support plates located at the same elevation in real time and transmit it to the intelligent control system. When the pressure value of the support plate of a certain waler support device or a certain side of the support plate changes abruptly, the intelligent control system automatically drives the hydraulic structure of the corresponding telescopic rod to realize automatic compensation of the support axial force, so that the pressure values ​​on the four sides of the support plate are equal and ensure that the support plates of multiple waler support devices are on the same horizontal plane.

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