A vertical inclined pile supporting structure easy to return into rock, construction method and construction equipment

Abstract

The application provides a vertical inclined pile supporting structure easy to be recycled, a construction method and construction equipment. The supporting structure comprises a limiting base assembly, a plurality of vertical piles, a plurality of steel sheet piles and a plurality of inclined piles. A plurality of vertical pile reserved holes and steel sheet pile / inclined pile reserved holes are formed on the limiting base assembly in a staggered manner. A top limiting section of the vertical pile abuts against the limiting base assembly. A top limiting section of the inclined pile is connected with the limiting base assembly as a whole. A bottom rock stratum embedding section of the vertical pile and a bottom rock stratum embedding section of the inclined pile are embedded in the rock stratum. The foundation pit supporting structure is easy to be dismantled and recycled. The water and soil lateral pressure borne by the vertical pile is transmitted to the inclined pile through the limiting base assembly. The inclined pile transmits the pressure to the bottom hard rock mass, so that the supporting stability is high.

Description

Technical Field

[0001] This invention patent relates to the technical field of foundation pit support in construction engineering, specifically to an easily recyclable rock-inserted vertical inclined pile support structure and its construction method and equipment. Background Technology

[0002] In urban deep foundation pit engineering, the two most commonly used support methods are: 1. using cast-in-place piles + water-stop curtain + anchor bolt support; 2. retaining piles (or diaphragm walls) + internal bracing support.

[0003] Whether it's cast-in-place piles, retaining piles, or diaphragm walls, all involve drilling holes or trenches underground to place reinforcing cages and pour concrete. Water-stop curtains require the pouring of large amounts of cement underground; anchor bolts require the placement of steel strands underground and the pouring of cement; internal supports are generally made of reinforced concrete; and the base of columns requires the pouring of reinforced concrete. All of these are single-use projects, permanently placed underground after fulfilling their temporary function of supporting the foundation pit, resulting in significant waste, high energy consumption, and high carbon emissions.

[0004] The steel sheet pile + steel pipe internal bracing retaining structure, after fulfilling its temporary function of foundation pit protection, involves removing the steel sheet piles and dismantling the internal bracing for subsequent reuse. It is energy-efficient, low-carbon, and environmentally friendly. However, it also has limitations, including: ① Existing steel sheet pile technology cannot penetrate hard rock. The most effective current rock penetration technology is auger drilling, but this only works on soft rock. When encountering hard rock within the area above and below the foundation elevation, the steel sheet piles may not be properly embedded or the embedment depth may be insufficient, failing to guarantee foundation pit safety; ② Traditional internal bracing methods, with the support structure arranged longitudinally and transversely within the foundation pit, pose significant obstacles to earthwork excavation and civil construction, severely reducing efficiency. Furthermore, subsequent replacement and dismantling of the bracing are complex, time-consuming, and costly. Summary of the Invention

[0005] This invention provides an easily recoverable rock-grown vertical inclined pile support structure, construction method, and construction equipment, which can solve the problems of difficult recovery and poor support stability of existing deep foundation pit support structures.

[0006] To achieve the above-mentioned technical problems, the easily recoverable rock-receiving vertical inclined pile combined support structure proposed in this invention is implemented using the following technical solution: An easily recoverable rock-receiving vertical inclined pile support structure, comprising:

[0007] The limiting base assembly is located on the ground at the top of the foundation pit and includes multiple limiting base sections connected sequentially along the circumference of the foundation pit. The limiting base has multiple reserved holes for vertical piles and multiple reserved holes for steel sheet piles / inclined piles that are spaced apart along its extension direction. The reserved holes for vertical piles and steel sheet piles / inclined piles are arranged alternately.

[0008] Multiple vertical piles are erected and correspond one-to-one with the multiple pre-reserved holes for the vertical piles. Each vertical pile includes a top limiting section, a middle soil penetration section, and a bottom rock embedding section arranged sequentially from top to bottom. The top limiting section is inserted into the pre-reserved hole of the vertical pile and abuts against the limiting base from above. The middle soil penetration section passes through the soil layer of the foundation pit, and the bottom rock embedding section is embedded in the rock layer below the soil layer of the foundation pit.

[0009] Multiple sheet piles are erected and correspond one-to-one with the reserved holes of the sheet piles / inclined piles. The sheet piles are completely inserted into the soil layer and are connected to the soil layer crossing section in the middle of the adjacent vertical piles.

[0010] Multiple inclined piles are provided, each corresponding to a pre-drilled hole of a sheet pile / inclined pile and inclined inside the sheet pile. Each inclined pile includes, from top to bottom, a top limiting section, a middle soil penetration section, and a bottom rock embedding section. The top limiting section is inserted into the pre-drilled hole of the sheet pile / inclined pile and is integrated with the limiting base. The middle soil penetration section abuts against the slope of the pre-reserved soil layer in the foundation pit, and the bottom rock embedding section is embedded in the rock layer.

[0011] The limiting base has a first height limiting part located around the reserved hole of each vertical pile, and a second height limiting part is correspondingly formed on the top limiting section of the vertical pile. The second height limiting part is located above the first height limiting part. When the vertical pile descends through the reserved hole of the vertical pile to the second height limiting part and abuts against the first height limiting part, the vertical pile is in place in the rock.

[0012] The limiting base has inclined pile fixing components located around the reserved holes of each sheet pile / inclined pile. The inclined pile fixing components are located above the reserved holes of the sheet pile / inclined pile and are inclined tubular with an inclination angle matching the inclination angle of the inclined pile. The top of the inclined pile is located above the inclined pile fixing components and is fixedly connected to the inclined pile fixing components.

[0013] The inclined pile fixing assembly includes an inner arc-shaped part and an outer arc-shaped part. The top of the inner arc-shaped part has an outwardly turned flange connection part. The top of the inclined pile is provided with a connecting flange. The connecting flange and the flange connection part are fixed together by a fastening assembly. The outer arc-shaped part is fixed on the limiting base after the steel sheet pile is inserted into the soil layer.

[0014] The center of the reserved hole for the vertical pile is located on the center line of the width direction of the limiting base, and the center of the reserved hole for the sheet pile / inclined pile is also located on the center line of the width direction of the limiting base;

[0015] The limiting base is a two-part splicing structure, including a first part and a second part divided along the center line of its width direction. The first part and the second part are detachably connected as one unit by a first connecting component.

[0016] Both the first part and the second part include a horizontal part and a vertical part located on one side of the horizontal part, so that the end face of the limiting base is U-shaped with the opening facing upward, and the reserved hole for the vertical pile and the reserved hole for the sheet pile / inclined pile are located on the horizontal part;

[0017] The first connecting assembly is provided between each pair of adjacent vertical pile reserved holes and sheet pile / inclined pile reserved holes. The first connecting assembly includes two first fastening parts at both ends and a first connecting part in the middle. The two first fastening parts are respectively fastened to the vertical parts of the first part and the second part, and the first connecting part is connected to the first fastening parts.

[0018] The first fastening part is U-shaped and is inserted into the vertical part from top to bottom, and is connected to the vertical part by bolts.

[0019] The two adjacent limiting base sections are connected as one unit by a second connecting component. The second connecting component includes two second fastening parts at both ends and a second connecting part in the middle. The two second fastening parts are respectively fastened to the vertical parts of the first part and the second part. The second connecting part is detachably connected to the two second fastening parts.

[0020] The present invention also proposes a construction method for the above-mentioned support structure, comprising the following steps:

[0021] Install the limiting base assembly on the ground at the top of the foundation pit, and construct vertical piles and sheet piles for each section of the limiting base assembly one by one until all vertical piles and sheet piles on the limiting base assembly within the set length range are constructed. Then construct all inclined piles on the limiting base assembly within the set length range one by one.

[0022] When constructing vertical piles, the vertical pile is first pressed down through the pre-reserved hole to the bedrock surface. Then, the pipe drilling continues to allow the bottom rock layer embedded section of the vertical pile to enter the rock layer below the foundation pit soil layer until the top limiting section of the vertical pile abuts against the limiting base.

[0023] When constructing sheet piles, they are pressed into the bottom of the pre-drilled holes of the sheet piles / inclined piles and into the lower impermeable stable soil layer. The top of the sheet piles is inserted below the limiting base, and the sheet piles are connected to the adjacent constructed vertical piles as one unit.

[0024] When constructing inclined piles, the inclined piles are first driven into the bedrock surface through the pre-reserved holes of the sheet piles / inclined piles. Then, the piles are continued to be drilled with the casing to allow the bottom rock layer of the inclined pile to be embedded in the rock layer below the foundation pit soil layer until the set depth is reached.

[0025] Connect the top of the inclined pile to the limiting base. At this point, the vertical pile, the inclined pile, and the limiting base are connected as one unit at the ground.

[0026] This invention also proposes a construction equipment for constructing the above-mentioned support structure, comprising:

[0027] A base is provided on which a drilling rig, a pile driver, and a crane are arranged sequentially from the outside to the inside along the radial direction of the foundation pit;

[0028] The drilling rig is slidably mounted on the base so as to slide closer to or away from the pile driver.

[0029] The bottom of the frame of the pile driver is provided with multiple telescopic legs arranged circumferentially. The telescopic ends of the telescopic legs are connected to the bottom of the frame of the pile driver, and the bottom ends of the telescopic legs are hinged to the base. A telescopic device is also connected between the frame of the pile driver and the base to drive the pile driver to rotate relative to the base around the hinge point between its telescopic legs and the base.

[0030] The pile driver is equipped with a first retractable clamping device, a second retractable clamping device, and a telescopic insertion and extraction device. The first retractable clamping device extends horizontally to clamp the vertical pile and the inclined pile. The second retractable clamping device extends horizontally to clamp the sheet pile. The telescopic insertion and extraction device extends vertically to drive the first retractable clamping device and the second retractable clamping device to rise and fall, thereby inserting and extracting the vertical pile, the inclined pile, and the sheet pile.

[0031] Compared with the prior art, the present invention has the following advantages and positive effects:

[0032] 1. In the foundation pit support structure of the present invention, the vertical piles and inclined piles are fixed together by the limiting base assembly set on the ground at the top of the foundation pit. The limiting base assembly is set on the ground at the top of the foundation pit and is a structural component. Compared with the existing cast-in-place piles, retaining piles or diaphragm walls fixed by steel cages and concrete, it is easier to dismantle and recycle. After recycling, it can be reused for subsequent turnover. It is low-energy, low-carbon and green.

[0033] 2. The limiting base is equipped with reserved holes for vertical piles and steel sheet piles / inclined piles, which can limit and guide the installation of vertical piles, steel sheet piles and inclined piles, improve the accuracy of the construction position of vertical piles, steel sheet piles and inclined piles, prevent pile deviation, and thus improve the stability of the support.

[0034] 3. The foundation pit support structure in this invention is a retaining structure with triangular inclined bracing. The vertical piles bear the main water and soil lateral pressure on the periphery of the foundation pit and are embedded in the rock at the bottom, bearing the main bending and shear resistance functions. The steel sheet piles bear the soil retention function between the vertical piles, and the two are connected to also serve as water-stopping functions. The water and soil lateral pressure borne by the vertical piles is transmitted to the inclined piles through the limiting base. The inclined piles mainly bear the compressive stress and transmit the pressure to the hard rock mass at the bottom, resulting in high support stability.

[0035] 4. The foundation pit support structure in this invention is located outside the foundation pit, which will not cause obstacles to earthwork excavation and civil construction, and is conducive to improving construction efficiency.

[0036] 5. The construction method of this invention can avoid the problems caused by existing pile anchor support construction where anchor rods are driven into the ground outside the foundation pit, resulting in damage to surrounding underground structures and cracking of the ground or surface structures. It can also avoid the obstacles that internal support construction can pose to subsequent earthwork excavation and civil engineering construction, and can also avoid the foundation pit safety problems caused by excavation and civil engineering construction easily damaging the support structure. This greatly speeds up the construction period and reduces the cost. Moreover, the construction does not disturb the surrounding soil, has no vibration, low noise, and no mud pollution.

[0037] 6. The construction equipment in this invention integrates hoisting, vertical / inclined pile driving, pile extraction, and drilling into rock, making it convenient and flexible to use. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention;

[0039] Figure 2 for Figure 1 Enlarged view of part A;

[0040] Figure 3 for Figure 1 View from direction B;

[0041] Figure 4 for Figure 3 Enlarged view of part C;

[0042] Figure 5 for Figure 3 The D-direction view;

[0043] Figure 6 for Figure 5 Enlarged view of part E;

[0044] Figure 7 This is a schematic diagram of the base structure of an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention;

[0045] Figure 8 for Figure 7 Enlarged view of part F;

[0046] Figure 9 for Figure 7 An enlarged view of the AA-direction sectional view;

[0047] Figure 10 for Figure 7 An enlarged view of the BB-directed sectional view;

[0048] Figure 11 for Figure 7 Enlarged view of the CC-direction section;

[0049] Figure 12 This is a schematic diagram of the connection structure between vertical piles and sheet piles in an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention;

[0050] Figure 13 for Figure 12 Enlarged view of the DD section view;

[0051] Figure 14 This is a schematic diagram of the relative positions of inclined piles and sheet piles at the reserved holes of sheet piles / inclined piles in an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention.

[0052] Figure 15 This is a schematic diagram of the connection structure between the inclined pile and the limiting base of an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention;

[0053] Figure 16 This is a schematic diagram of the construction equipment structure for an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention. Figure 1 ;

[0054] Figure 17 This is a schematic diagram of the construction equipment structure for an easily recoverable rock-supported vertical inclined pile structure according to an embodiment of the present invention. Figure 2 ;

[0055] Figure 18 This is a schematic diagram of the pile driver structure of a construction equipment for an easily recoverable rock-grown vertical inclined pile support structure according to an embodiment of the present invention.

[0056] Figure 19 This is a schematic diagram of the casing drilling tool structure of a construction equipment for an easily recoverable rock-grown vertical inclined pile support structure according to an embodiment of the present invention.

[0057] Figure label:

[0058] 100. Limiting base assembly; 110. Limiting base; 111. Vertical pile reserved hole; 112. Steel sheet pile / inclined pile reserved hole; 113. First height limiting part; 114. First part; 115. Second part; 116. Horizontal part; 117. Vertical part; 121. Inner arc-shaped part; 122. Outer arc-shaped part; 123. Flange connection part; 130. First connecting assembly; 131. First fastening part; 132. First connecting part; 140. Second connecting assembly; 141. Second fastening part; 142. Second connecting part;

[0059] 200. Vertical pile; 210. Top limiting section of vertical pile; 220. Middle soil penetration section of vertical pile; 230. Bottom rock embedment section of vertical pile; 240. Heel shoe; 250. Second height limiting section; 260. Locking buckle;

[0060] 300. Inclined pile; 310. Top limiting section of inclined pile; 320. Middle soil support section of inclined pile; 330. Bottom rock embedding section of inclined pile; 340. Connecting flange; 350. U-pin; 360. Fastening assembly;

[0061] 400. Steel sheet piles;

[0062] 1. Excavation pit; 2. Soil layer; 3. Rock layer; 4. Bedrock surface; 5. Drilling rig; 6. Piling machine; 7. Crane; 8. Base; 9. Telescopic outrigger; 10. Telescopic device; 11. Drilling rig slide; 12. Pipe-following rock drilling tool; 13. Reamer wing block; 13.1. Hook; 13.2. Horizontal plane; 13.3. Inclined plane; 13.4. Alloy block. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] First, the directional terms "inner" and "outer" involved in this embodiment will be explained. The direction closer to the center of the structural component is "inner", and the direction farther away from the center of the structural component is "outer". For example, taking the foundation pit as an example, the direction along the radial direction of the foundation pit closer to the center of the foundation pit is "inner", and the direction farther away from the center of the foundation pit is "outer".

[0065] Reference Figures 1 to 15 This embodiment provides an easy-to-return rock-supported vertical and inclined pile structure, including a limiting base assembly 100, multiple vertical piles 200, multiple sheet piles 400, and multiple inclined piles 300.

[0066] The limiting base assembly 100 is located on the ground around the top of the foundation pit 1, and can be fixed to the ground by T-shaped steel nails. Due to the large circumferential length of the foundation pit 1, the limiting base assembly 100 is a multi-section splicing structure for easy processing, transportation and installation. It includes multiple limiting base sections 110 connected sequentially along the circumference of the foundation pit 1. Each limiting base 110 has multiple vertical pile reserved holes 111 and multiple sheet pile / inclined pile reserved holes 112 spaced apart along its extension direction. The vertical pile reserved holes 111 and the sheet pile / inclined pile reserved holes 112 are staggered, that is, one vertical pile reserved hole 111, one sheet pile / inclined pile reserved hole 112, one vertical pile reserved hole 111, one sheet pile / inclined pile reserved hole 112, and so on.

[0067] The vertical piles 200 are erected vertically, specifically circular steel pipe piles with a diameter of 300-1000mm and a wall thickness of not less than 8mm. A casing shoe 240 is installed at the bottom for the casing drill to drive the steel pipe into the rock. The top of each vertical pile 200 has a hole for hoisting. Multiple vertical piles 200 are correspondingly installed with multiple pre-drilled holes 111, each hole being a circular hole. Figures 6 to 8 As shown, it is adapted to the vertical pile 200. During construction and installation, the vertical pile 200 is inserted into the soil or rock through the corresponding reserved hole 111. Each vertical pile 200 includes, from top to bottom, a top limiting section 210, a middle soil penetration section 220, and a bottom rock embedding section 230. The top limiting section 210 is inserted into the reserved hole 111 and abuts against the limiting base 110 from above. The middle soil penetration section 220 penetrates the soil layer 2 of the foundation pit 1. The bottom rock embedding section 230 is embedded in the rock layer 3 below the soil layer 2.

[0068] The sheet piles 400 are installed vertically, and can be Larssen sheet piles (generally 450-750mm wide) or custom-made wide sheet piles. Multiple sheet piles 400 are correspondingly installed with multiple pre-drilled sheet pile / inclined pile holes 112. During construction and installation, they enter the soil layer 2 through the corresponding pre-drilled sheet pile / inclined pile hole 112, and are ultimately fully inserted into the soil layer 2, connecting with the soil-penetrating section 220 of the adjacent vertical pile 200. The pre-drilled sheet pile / inclined pile hole 112 has a portion that fits the sheet pile 400. Taking Larssen sheet piles as an example, the cross-section of the portion of the pre-drilled sheet pile / inclined pile hole 112 that fits the sheet pile 400 is U-shaped. Figure 8 As shown. Since multiple vertical pile reserved holes 111 and multiple sheet pile / inclined pile reserved holes 112 are staggered, multiple vertical pile reserved holes 111 and multiple sheet piles 400 are staggered.

[0069] The inclined pile 300 is set at an inclination. Specifically, it is a circular steel pipe pile with a diameter of 300-1000mm and a wall thickness of not less than 8mm. The inclination angle is generally 45-60°. The bottom end is also equipped with a pipe-following iron shoe for the pipe-following drill to drive the steel pipe into the rock. The pile body is equipped with two holes according to the hoisting requirements. Multiple inclined piles 300 are set one-to-one with multiple steel sheet pile / inclined pile reserved holes 112 and are set at an inclination inside the steel sheet pile 400. When the inclined pile 300 is constructed and installed, it is driven into the soil or rock through the corresponding steel sheet pile / inclined pile reserved hole 112. Each inclined pile 300 includes, from top to bottom, a top limiting section 310, a middle soil support section 320, and a bottom rock embedding section 330. The top limiting section 310 is inserted into the pre-drilled hole 112 of the sheet pile / inclined pile and is integrated with the limiting base 110. The middle soil support section 320 abuts against the pre-reserved soil slope of the foundation pit. The bottom rock embedding section 330 is embedded in the rock layer 3 below the soil layer 2. The pre-drilled hole 112 of the sheet pile / inclined pile has a portion that matches the inclined pile 300. Taking the inclined pile 300 as a circular steel pipe pile as an example, the cross-section of the portion of the pre-drilled hole 112 that matches the inclined pile 300 is circular. Figure 8 As shown.

[0070] The triangular slope soil between the inclined pile 300 and the vertical pile 200 can be left or excavated depending on the site space. If the site space allows, the solution of leaving the slope is generally adopted, which can reduce the design parameters of the support structure. If the site space is limited and the triangular slope is within the scope of the underground structure, the triangular slope can be excavated. In this case, the inclined pile 300 needs to be reinforced with isolation steel pipes at the location where it encounters the civil engineering structure, and the slope should be sealed after the inclined pile 300 is pulled out.

[0071] In this embodiment of the invention, the foundation pit support structure consists of vertical piles 200 and inclined piles 300, which are fixedly connected as a whole by a limiting base assembly 100 located on the top ground of the foundation pit 1. The limiting base assembly 100, located on the top ground of the foundation pit 1, is a structural component. Compared with existing cast-in-place piles, retaining piles, or diaphragm walls fixed with steel cages and concrete, it is easier to dismantle and recycle. After recycling, it can be reused for subsequent turnover, which is beneficial for energy conservation, emission reduction, and environmental protection. The reserved holes 111 for vertical piles and 112 for sheet piles / inclined piles on the limiting base 110 can limit and guide the installation of vertical piles 200, sheet piles 400, and inclined piles 300, improve the accuracy of the construction position of vertical piles 200, sheet piles 400, and inclined piles 300, and achieve non-deflection of piles, thereby improving the stability of the support.

[0072] In this embodiment of the invention, the support structure for the foundation pit 1 is a retaining structure with triangular bracing. The vertical piles 200 bear the main water and soil lateral pressure on the periphery of the foundation pit 1, and are embedded in the rock at the bottom, bearing the main functions of bending and shear resistance. The steel sheet piles 400 bear the soil retention function between the vertical piles 200, and the two are connected to also serve as a water stop function. The water and soil lateral pressure borne by the vertical piles 200 is transmitted to the inclined piles 300 through the limiting base 110. The inclined piles 300 mainly bear the compressive stress, transmitting the pressure to the hard rock mass at the bottom, resulting in high support stability. The support structure for the foundation pit 1 is located outside the foundation pit 1, and will not cause obstacles to earthwork excavation and civil construction, which is conducive to improving construction efficiency.

[0073] For the abutment between the top limiting section 210 of the vertical pile and the limiting base 110, a second height limiting part 250 can be formed by setting a reinforcing steel pipe around the outer ring of the top limiting section 210 of the vertical pile. An arc-shaped steel plate is welded around each reserved hole 111 of the vertical pile on the limiting base 110 to form a first height limiting part 113. The second height limiting part 250 is located above the first height limiting part 113. When the vertical pile 200 descends through the reserved hole 111 of the vertical pile to the second height limiting part 250 abutting against the first height limiting part 113, the top limiting section 210 of the vertical pile abuts against the limiting base 110, and the vertical pile 200 is inserted into the rock in place. Figure 2 , Figure 6 and Figure 9 As shown, the second height limiting part 250 is generally 300-500mm high and about 30mm thick, and is a symmetrically arranged two semi-arc tube structure that wraps around the top limiting section 210 of the vertical pile, so as to avoid the connection between the vertical pile 200 and the sheet pile 400 and avoid affecting the connection with the sheet pile 400; the first height limiting part 113 is generally 20-40mm high and about 20mm thick, and is a multi-arc plate structure arranged along the circumference. After the vertical pile 200 is driven into the rock, the second height limiting part 250 and the first height limiting part 113 come into contact and abut against each other, which can also control the top elevation of the vertical pile 200 and fix the limiting base 110.

[0074] Regarding the connection between the top limiting section 310 of the inclined pile and the limiting base 110, specifically, as follows: Figure 2 , Figure 4 , Figure 6 , Figure 8 , Figure 10 , Figure 12 , Figure 14 and Figure 15 As shown, inclined pile fixing components are formed on the limiting base 110 around the reserved holes 112 of each sheet pile / inclined pile. The inclined pile fixing components are located above the reserved holes 112 of the sheet pile / inclined pile. They are in the shape of an inclined tube, and the inclination angle matches the inclination angle of the inclined pile 300. The top of the inclined pile 300 is located above the inclined pile fixing components and is fixedly connected to the inclined pile fixing components.

[0075] Furthermore, the inclined pile fixing assembly includes an inner arc-shaped portion 121 and an outer arc-shaped portion 122, such as... Figure 2 As shown, the inner arc-shaped portion 121 is closer to the center of the pit 1 than the outer arc-shaped portion 122. The inner arc-shaped portion 121 is positioned higher, and an outwardly turned flange connection portion 123 is formed at the top of the inner arc-shaped portion 121. A connecting flange 340 is provided at the top of the inclined pile top limiting section 310. The connecting flange 340 and the flange connection portion 123 are fixed together by a fastening assembly 360. The outer arc-shaped portion 122 is fixed on the limiting base 110 after the steel sheet pile 400 is inserted into the soil layer 2, so as to avoid interfering with the steel sheet pile 400 entering the soil layer 2 through the steel sheet pile / inclined pile reserved hole 112. Specifically, the outer arc-shaped portion 122 can be fixed on the limiting base 110 by welding.

[0076] Specifically, such as Figure 14 and Figure 15 As shown, the inner arc-shaped portion 121 and the outer arc-shaped portion 122 together form an inclined limiting tubular structure adapted to the inclined pile 300. The outer arc-shaped portion 122 supports the inclined pile top limiting section 310 below the inclined pile top limiting section 310, while the inner arc-shaped portion 121 limits the inclined pile top limiting section 310 above the inclined pile top limiting section 310. The connecting flange 340 is fitted onto the top of the inclined pile top limiting section 310 and is circumferentially limited by a U-shaped pin 350. The fastening assembly 360 uses long bolts and nuts. This structural form does not hinder the construction and installation of the sheet pile 400, and can also smoothly transfer the water and soil lateral pressure borne by the vertical pile 200 to the limiting base 110, and then to the inclined pile 300, and then from the inclined pile 300 to the hard rock mass at the bottom. Moreover, the connection structure is easy to disassemble and easy to recover.

[0077] To further facilitate processing, transportation, installation, and dismantling, the center of the pre-drilled hole 111 for the vertical pile is located on the center line of the width direction of the limiting base 110, and the center of the pre-drilled hole 112 for the sheet pile / inclined pile is also located on the center line of the width direction of the limiting base 110. The limiting base 110 is a two-part splicing structure, including a first part 114 and a second part 115 divided along its width direction center line. The first part 114 and the second part 115 are detachably connected as a whole by the first connecting component 130. When assembling the base 8 on the ground at the top of the foundation pit 1, adjacent sections of the limiting base 110 can be assembled as a whole first, and then the first part 114 and the second part 115 can be connected gradually as the vertical pile 200 and the sheet pile 400 are constructed.

[0078] Since the vertical pile 200 and the sheet pile 400 need to be connected to each other, there must be a connection structure between them. By appropriately configuring the width of the splicing gap between the first part 114 and the second part 115, the connection structure between the sheet pile 400 and the vertical pile 200 can be avoided. That is, during the process of the sheet pile 400 being pressed into the soil layer 2, the splicing gap between the first part 114 and the second part 115 can avoid the connection structure set on the sheet pile 400 for connecting with the vertical pile 200, so that the sheet pile 400 can be smoothly pressed into the soil layer 2.

[0079] Specifically, locking buckles 260 are welded to opposite sides of the vertical pile 200. The location of the locking buckles 260 needs to be determined according to design requirements, specifically on the soil penetration section 220 in the middle of the vertical pile. Correspondingly, locking buckles 260 are also provided on opposite sides of the sheet pile 400, which cooperate and connect with the locking buckles 260 on both sides of the vertical pile 200, such as... Figure 6 As shown, it simultaneously achieves the function of water-stopping the support structure.

[0080] Furthermore, both the first part 114 and the second part 115 include a horizontal part 116 and a vertical part 117 located on one side of the horizontal part 116, so that the end face of the limiting base 110 is U-shaped with the opening facing upward. The vertical pile reserved hole 111 and the sheet pile / inclined pile reserved hole 112 are provided on the horizontal part 116. Each vertical pile reserved hole 111 is provided in half on the horizontal part 116 of the first part 114 and half on the horizontal part 116 of the second part 115, and are assembled to form the entire vertical pile reserved hole 111. Similarly, the sheet pile / inclined pile reserved hole 112 is also formed by assembling the first part 114 and the second part 115.

[0081] To improve the overall integrity and structural strength of the entire limiting base assembly 100, the first connecting assembly 130 is provided between each pair of adjacent vertical pile pre-reserved holes 111 and sheet pile / inclined pile pre-reserved holes 112, that is, between each of the two adjacent vertical pile top limiting sections 210 and inclined pile top limiting sections 310, to improve the integrity of the two-half limiting base 110, thereby improving the overall integrity and structural strength of the entire limiting base assembly 100. Figure 12 and Figure 13 As shown, the first connecting component 130 specifically includes two first fastening parts 131 at both ends and a first connecting part 132 in the middle. The two first fastening parts 131 are fastened to the vertical parts 117 of the first part 114 and the second part 115 respectively. The first connecting part 132 is connected to the first fastening parts 131, so that the two halves of the limiting base 110 form a whole.

[0082] Furthermore, the first fastening part 131 is U-shaped and is inserted into the vertical part 117 from top to bottom, and is connected to the vertical part 117 by bolts and nuts, facilitating assembly and disassembly. The U-shaped first fastening part 131 being inserted into the vertical part 117 and then fastened to it by bolts and nuts results in a large contact area between the first connecting assembly 130 and the limiting base 110, leading to high connection strength and stability. The first connecting part 132 is specifically plate-shaped and is welded to the first fastening parts 131 at both ends.

[0083] The connection between two adjacent limiting base sections 110 is specifically formed by the second connecting assembly 140. The structure of the second connecting assembly 140 is similar to that of the first connecting assembly 130, including two second fastening parts 141 at both ends and a second connecting part 142 in the middle. The two second fastening parts 141 are fastened to the vertical parts 117 of the first part 114 and the second part 115 respectively, and the second connecting part 142 is detachably connected to the two second fastening parts 141.

[0084] Furthermore, the second fastening part 141 is U-shaped and is inserted into the vertical part 117 from top to bottom, and is connected to the vertical part 117 by bolts and nuts, facilitating assembly and disassembly. The U-shaped second fastening part 141 being inserted into the vertical part 117 and then fastened to it by bolts and nuts results in a large contact area between the second connecting assembly 140 and the limiting base 110, leading to high connection strength and stability. The second connecting part 142 is specifically plate-shaped and is also fastened to the second fastening parts 141 at both ends using bolts and nuts.

[0085] Since the limiting base assembly 100 is installed in place on the top ground of the foundation pit 1 and before the installation of the vertical pile 200 and the sheet pile 400, adjacent limiting base sections 110 must be pre-connected into one piece by the second connecting assembly 140 to ensure the integrity of the limiting base assembly 100. When installing the sheet pile 400 and / or vertical pile 200 at the connection of adjacent limiting base sections 110, the second connecting assembly 140 must not obstruct the sheet pile 400 or vertical pile 200 from extending downward into the soil layer 2 and rock layer 3. This technical effect can be achieved by detachably connecting the second connecting part 142 of the second connecting assembly 140 to the two second fastening parts 141 at both ends.

[0086] Specifically, when the limiting base assembly 100 is installed on the ground at the top of the foundation pit 1, adjacent limiting base sections 110 are connected as one unit using the second connecting assembly 140; while constructing the vertical piles 200 and sheet piles 400 one by one to the connection point of the adjacent limiting base sections 110, the second connecting part 142 of the second connecting assembly 140 at this point is first removed, and after the construction of the vertical piles 200 and / or sheet piles 400 at this point is completed, the second disassembly part is then installed in place.

[0087] This invention also proposes a construction method for constructing the above-mentioned support structure, comprising the following steps:

[0088] Install the limiting base assembly 100 on the ground at the top of the foundation pit 1, and construct the vertical piles 200 and sheet piles 400 one by one for each section of the limiting base 110 until all the vertical piles 200 and sheet piles 400 on the limiting base assembly 100 within the set length range are constructed. Then construct all the inclined piles 300 on the limiting base assembly 100 within the set length range one by one.

[0089] When constructing the vertical pile 200, the vertical pile 200 is first driven down through the pre-drilled hole 111 to the bedrock surface 4. Then, the pile is driven further into the bedrock 3 below the soil layer 2 of the foundation pit 1 by the bottom rock embedment section 230. The pile is driven down until the top limiting section 210 abuts against the limiting base 110. Specifically, the vertical pile guide horn is first installed in the pre-drilled hole 111. Then, the pile driver is positioned and the vertical pile 200 is driven into the soil to the bedrock surface 4 by static pressure. The vertical pile guide horn is removed, and the vertical pile 200 is driven into the bedrock until the top limiting section 210 abuts against the limiting base 110 by the down-the-hole drilling tool.

[0090] When constructing the sheet pile 400, the sheet pile 400 is connected to the adjacent installed vertical pile 200 via the locking buckle 260. The sheet pile 400 is then pressed into the soil layer 2 through the pre-drilled hole 112 until its bottom end enters the lower impermeable stable soil layer 2, and its top end enters below the limiting base 110, so as to leave space for the inclined pile 300 to be pressed in. When the limiting base 110 is a two-part split structure, after the sheet pile 400 reaches the design depth, the first connecting component 130 located between the sheet pile 400 and the vertical pile 200 is installed on the limiting base 110 to secure the limiting base 110. The piles are connected as one unit, and then the next vertical pile 200, sheet pile 400, and first connecting component 130 are installed in sequence. When the two limiting bases 110 are connected, the second connecting part 142 of the second connecting component 140 is removed to install the vertical pile 200 or sheet pile 400. After installation, the second connecting part 142 is installed again, and the installation of the next vertical pile 200, sheet pile 400, and first connecting component 130 is continued in sequence. This process is repeated until all the vertical piles 200 and sheet piles 400 on the limiting base component 100 within the set length range are completed.

[0091] When constructing the inclined pile 300, the inclined pile 300 is first driven down to the bedrock surface 4 through the pre-reserved hole 112 of the sheet pile / inclined pile. Then, the pipe drilling continues to drive the bottom rock layer embedded section 330 of the inclined pile into the rock layer 3 below the soil layer 2 of the foundation pit 1 until the set depth is reached. Specifically, the guide horn of the inclined pile 300 is first installed in the pre-reserved hole 112 of the sheet pile / inclined pile. Then, the pile driver is positioned and the inclined pile 300 is driven into the soil to the bedrock surface 4 by static pressure. The guide horn of the inclined pile 300 is removed, and the inclined pile 300 is driven into the rock to the designed depth below the bedrock surface 4 through the down-the-hole pipe drilling tool. The connecting flange 340 is installed on the top of the vertical pile 200.

[0092] Connect the top of the inclined pile 300 to the limiting base 110. At this point, the vertical pile 200, the inclined pile 300 and the limiting base 110 are connected as one unit at the ground.

[0093] After the support structure is completed, the foundation pit 1 is excavated, and the underground civil engineering structure is constructed. The foundation trench is backfilled and compacted. After the backfilling is completed, the support structure is pulled out and retrieved. The pulling sequence is as follows: remove the connection between the inclined pile 300 and the limiting base 110 → pull out the inclined pile 300 → disassemble the limiting base 110 → pull out the vertical pile 200 → pull out the steel sheet pile 400. After the steel sheet pile 400 is pulled out, the pile hole is filled.

[0094] Reference Figures 16 to 19 In this embodiment of the invention, a construction equipment is also proposed for constructing the support structure in this embodiment of the invention, including a base 8, on which a drilling rig 5, a pile driver 6 and a crane 7 are arranged sequentially from the outside to the inside along the radial direction of the foundation pit 1.

[0095] The drilling rig 5 is slidably mounted on the base 8 so that it can slide close to or away from the pile driver 6 in order to avoid the pile driver 6.

[0096] The bottom of the frame of the pile driver 6 is provided with multiple telescopic legs 9 arranged circumferentially. The telescopic ends of the telescopic legs 9 are connected to the bottom of the frame of the pile driver 6, and the bottom end of the telescopic legs 9 is hinged to the base 8. A telescopic device 10 is also connected between the frame of the pile driver 6 and the base 8, which is used to drive the pile driver 6 to rotate relative to the base 8 around the hinge point between its telescopic legs 9 and the base 8.

[0097] The frame of the pile driver 6 is equipped with a first retractable clamping device 6.1, a second retractable clamping device 6.2, and a telescopic insertion and extraction device 6.3. The first retractable clamping device 6.1 extends horizontally to clamp the vertical piles 200 and the inclined piles 300. The second retractable clamping device 6.2 extends horizontally to clamp the sheet piles 400. The telescopic insertion and extraction device 6.3 extends vertically to drive the first retractable clamping device 6.1 and the second retractable clamping device 6.2 to rise and fall, so as to insert and extract the vertical piles 200, the inclined piles 300, and the sheet piles 400.

[0098] Crane 7 is used to lift vertical piles 200, sheet piles 400 and inclined piles 300. Lifting holes are provided on the top of vertical piles 200, sheet piles 400 and inclined piles 300 respectively.

[0099] Specifically, a slide rail for the drilling rig 5 is formed on the base 8. The bottom of the drilling rig 5 frame slides in conjunction with the slide rail. Once it has slid into place, a fixing pin can be used to position the drilling rig 5. The telescopic device 10 can drive the pile driver 6 to rotate, for example, to rotate to a vertical position for vertical pile 200 construction, at which point the drilling rig 5 slides to a position close to the pile driver 6; or to rotate to an inclined position for inclined pile 300 construction, at which point the drilling rig 5 slides to a position away from the pile driver 6.

[0100] The first retractable clamping device 6.1 and the second retractable clamping device 6.2 are arranged vertically, for example, the first retractable clamping device 6.1 is located below the second retractable clamping device 6.2. Two sets of the first retractable clamping devices 6.1 are arranged horizontally opposite each other, and they move relative to each other or in opposite directions to clamp and release the vertical pile 200 and the inclined pile 300. Two sets of the second retractable clamping devices 6.2 are arranged horizontally opposite each other, and they move relative to each other or in opposite directions to clamp and release the sheet pile 400. The first retractable clamping device 6.1 is specifically a hydraulic cylinder telescopic mechanism, and the piston rod output end of the hydraulic cylinder is fixed with an arc-shaped clamping plate to cooperate with the cylindrical vertical pile 200 and the inclined pile 300 for clamping. The second retractable clamping device 6.2 is specifically a hydraulic cylinder telescopic mechanism, and the piston rod output end of the hydraulic cylinder is fixed with a flat clamping plate to cooperate with the U-shaped sheet pile 400 for clamping.

[0101] Multiple telescopic insertion and extraction devices 6.3 are arranged circumferentially, specifically as hydraulic cylinder telescopic mechanisms. The first telescopic clamping device 6.1 and the second telescopic clamping device 6.2 are both located on the hydraulic cylinder piston rod of the telescopic insertion and extraction device 6.3, so as to achieve downward insertion and upward extraction with the rise and fall of the telescopic insertion and extraction device 6.3, inserting or pulling out the vertical pile 200, inclined pile 300, and steel sheet pile 400 from the ground.

[0102] Specifically, first, a vertical pile guide horn is installed in the reserved hole 111 of the vertical pile, then the pile driver is positioned and the vertical pile 200 is driven into the soil to the bedrock surface 4 under static pressure; the vertical pile guide horn is removed, and the vertical pile 200 is driven into the rock to the top limit section 210 of the vertical pile abutting against the limit base 110 through the downhole drilling tool.

[0103] As the vertical pile 200 is driven into the bedrock surface 4 and drilling continues downward, a section of drill rod and a casing drilling tool 12 are installed at the drill head. High-pressure air is connected to the upper end of the drill rig 5 and lowered into the vertical pile 200 to blow the soil out of the pipe. As the casing drilling tool 12 drills into the pipe, drill rods are installed section by section. After the drilling tool extends out of the bottom end of the vertical pile 200, the concave and convex design of the drilling tool will hold the drilling tool on the top surface of the casing shoe 240 at the bottom end of the vertical pile 200. At the same time, the reaming wing block 13 rotates outward under the compression of the central drill bit to expand the hole, so that the diameter of the expanded hole is not less than the outer diameter of the vertical pile 200. The high-pressure air drives the central drill bit and the reaming wing block of the casing drilling tool 12 to hammer the rock layer 3 at high frequency, breaking the rock layer 3 into stone powder and blowing it out of the hole. The casing drilling tool drives the vertical pile 200 to continue sinking to the designed depth through the casing shoe.

[0104] The process of driving inclined pile 300 into rock is basically the same as that of driving vertical pile into rock, and will not be described in detail here.

[0105] In some embodiments of the present invention, reference is made to... Figure 19 Multiple reaming blades 13 arranged circumferentially on the casing drilling tool 12 are connected to the casing drilling tool body by hooks 13.1. The casing drilling tool body is provided with corresponding hook grooves for rotating and holding the hooks 13.1. Compared with the existing technology that uses pin connection, the hooks 13.1 are easy to install, disassemble and maintain. The hooks 13.1 are larger in size, not easy to be damaged and durable; while the pin is inconvenient to install and has a smaller diameter, and is easy to be damaged.

[0106] The alloy mounting surface on the reaming wing block 13 includes a horizontal surface 13.2 and an inclined surface 13.3. The inclined surface 13.3 is inclined upward relative to the horizontal surface 13.2, and the volume of the alloy block on the inclined surface 13.3 is smaller than that of the alloy block on the horizontal surface 13.2. The horizontal surface 13.2 and the inclined surface 13.3 are positioned such that when the drill bit rotates clockwise, the inclined surface 13.3 is located in front of the horizontal surface 13.2 along the clockwise rotation direction. Since the rotary impact drilling is clockwise, the alloy block on the inclined surface 13.3 contacts the rock layer 3 first. The inclined surface 13.3 is inclined upward and the alloy block on it is relatively small, which can reduce the wear and damage to the alloy block at this point, and make the alloy blocks of different sizes work together as much as possible, making the reaming wing block 13 more efficient and durable.

[0107] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A vertical inclined pile support structure for easy recovery into rock, characterized in that, include: The limiting base assembly is located on the ground at the top of the foundation pit and includes multiple limiting base sections connected sequentially along the circumference of the foundation pit. The limiting base has multiple reserved holes for vertical piles and multiple reserved holes for steel sheet piles / inclined piles that are spaced apart along its extension direction. The reserved holes for vertical piles and steel sheet piles / inclined piles are arranged alternately. Multiple vertical piles are erected and correspond one-to-one with the multiple pre-reserved holes for the vertical piles. Each vertical pile includes a top limiting section, a middle soil penetration section, and a bottom rock embedding section arranged sequentially from top to bottom. The top limiting section is inserted into the pre-reserved hole of the vertical pile and abuts against the limiting base from above. The middle soil penetration section passes through the soil layer of the foundation pit, and the bottom rock embedding section is embedded in the rock layer below the soil layer of the foundation pit. Multiple sheet piles are erected and correspond one-to-one with the reserved holes of the sheet piles / inclined piles. The sheet piles are completely inserted into the soil layer and are connected to the soil layer crossing section in the middle of the adjacent vertical piles. Multiple inclined piles are provided, each corresponding to a pre-drilled hole of a sheet pile / inclined pile and inclined inside the sheet pile. Each inclined pile includes, from top to bottom, a top limiting section, a middle soil penetration section, and a bottom rock embedding section. The top limiting section is inserted into the pre-drilled hole of the sheet pile / inclined pile and is integrated with the limiting base. The middle soil penetration section abuts against the slope of the pre-reserved soil layer in the foundation pit. The bottom rock embedding section is embedded in the rock layer. The limiting base has a first height limiting part located around the reserved hole of each vertical pile, and a second height limiting part is correspondingly formed on the top limiting section of the vertical pile. The second height limiting part is located above the first height limiting part. When the vertical pile descends through the reserved hole of the vertical pile to the second height limiting part and abuts against the first height limiting part, the vertical pile is in place in the rock. The limiting base has inclined pile fixing components located around the reserved holes of each sheet pile / inclined pile. The inclined pile fixing components are located above the reserved holes of the sheet pile / inclined pile and are inclined tubular with an inclination angle matching the inclination angle of the inclined pile. The top of the inclined pile is located above the inclined pile fixing components and is fixedly connected to the inclined pile fixing components. The inclined pile fixing assembly includes an inner arc-shaped part and an outer arc-shaped part. The top of the inner arc-shaped part forms an outward flange connection part. The top of the inclined pile is provided with a connecting flange. The connecting flange and the flange connection part are fixed together by a fastening assembly. The outer arc-shaped part is fixed on the limiting base after the steel sheet pile is inserted into the soil layer. The limiting base is a two-half splicing structure, including a first part and a second part divided along the center line of its width direction. The first part and the second part are detachably connected as a whole by a first connecting component. Both the first part and the second part include a horizontal part and a vertical part located on one side of the horizontal part, so that the end face of the limiting base is U-shaped with the opening facing upward, and the reserved hole for the vertical pile and the reserved hole for the sheet pile / inclined pile are located on the horizontal part.

2. The easily recoverable rock-supported vertical inclined pile structure according to claim 1, characterized in that, The center of the reserved hole for the vertical pile is located on the center line of the width direction of the limiting base, and the center of the reserved hole for the sheet pile / inclined pile is also located on the center line of the width direction of the limiting base.

3. The easily recoverable rock-supported vertical inclined pile structure according to claim 2, characterized in that, The first connecting assembly is provided between each pair of adjacent vertical pile reserved holes and sheet pile / inclined pile reserved holes. The first connecting assembly includes two first fastening parts at both ends and a first connecting part in the middle. The two first fastening parts are respectively fastened to the vertical parts of the first part and the second part, and the first connecting part is connected to the first fastening parts.

4. The easily recoverable rock-supported vertical inclined pile structure according to claim 3, characterized in that, The first fastening part is U-shaped and is inserted into the vertical part from top to bottom, and is connected to the vertical part by bolts.

5. The easily recoverable rock-supported vertical inclined pile structure according to claim 1, characterized in that, The two adjacent limiting base sections are connected as one unit by a second connecting component. The second connecting component includes two second fastening parts at both ends and a second connecting part in the middle. The two second fastening parts are respectively fastened to the vertical parts of the first part and the second part. The second connecting part is detachably connected to the two second fastening parts.

6. A construction method for constructing the support structure according to any one of claims 1 to 5, characterized in that, Includes the following steps: Install the limiting base assembly on the ground at the top of the foundation pit, and construct vertical piles and sheet piles for each section of the limiting base assembly one by one until all vertical piles and sheet piles on the limiting base assembly within the set length range are constructed. Then construct all inclined piles on the limiting base assembly within the set length range one by one. When constructing vertical piles, the vertical pile is first pressed down through the pre-reserved hole to the bedrock surface. Then, the pipe drilling continues to allow the bottom rock layer embedded section of the vertical pile to enter the rock layer below the foundation pit soil layer until the top limiting section of the vertical pile abuts against the limiting base. When constructing sheet piles, they are pressed into the bottom of the pre-drilled holes of the sheet piles / inclined piles and into the lower impermeable stable soil layer. The top of the sheet piles is inserted below the limiting base, and the sheet piles are connected to the adjacent constructed vertical piles as one unit. When constructing inclined piles, the inclined piles are first driven into the bedrock surface through the pre-reserved holes of the sheet piles / inclined piles. Then, the piles are continued to be drilled with the casing to allow the bottom rock layer of the inclined pile to be embedded in the rock layer below the foundation pit soil layer until the set depth is reached. Connect the top of the inclined pile to the limiting base. At this point, the vertical pile, the inclined pile, and the limiting base are connected as one unit at the ground.

7. A construction equipment for constructing the support structure according to any one of claims 1 to 5, characterized in that, include: A base is provided on which a drilling rig, a pile driver, and a crane are arranged sequentially from the outside to the inside along the radial direction of the foundation pit; The drilling rig is slidably mounted on the base so as to slide closer to or away from the pile driver. The bottom of the frame of the pile driver is provided with multiple telescopic legs arranged circumferentially. The telescopic ends of the telescopic legs are connected to the bottom of the frame of the pile driver, and the bottom ends of the telescopic legs are hinged to the base. A telescopic device is also connected between the frame of the pile driver and the base to drive the pile driver to rotate relative to the base around the hinge point between its telescopic legs and the base. The pile driver is equipped with a first retractable clamping device, a second retractable clamping device, and a telescopic insertion and extraction device. The first retractable clamping device extends horizontally to clamp the vertical pile and the inclined pile. The second retractable clamping device extends horizontally to clamp the sheet pile. The telescopic insertion and extraction device extends vertically to drive the first retractable clamping device and the second retractable clamping device to rise and fall, thereby inserting and extracting the vertical pile, the inclined pile, and the sheet pile.

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