Soft ground reinforcement apparatus and method of construction

Abstract

The application relates to the technical field of foundation reinforcement, and discloses a soft foundation reinforcement device and a construction method, which comprise a plurality of pipe piles inserted into soil bodies, the pipe pile comprises a pipe body, a pipe tip is arranged below the pipe body, a fixing hole is arranged on the upper end surface of the pipe body, and a barbed structure for being inserted into the soil body is arranged on the pipe body; the barbed structure comprises an operating frame arranged on the circumferential surface of the pipe body, an operating rod is rotationally connected to the operating frame, an operating cylinder which can move along the axis direction of the operating rod is sheathed on the operating rod, an operating groove is arranged on the end surface of the operating cylinder which faces the axis of the pipe body, an operating tip is arranged on the end surface of the operating cylinder which is away from the axis of the pipe body, and a through hole is arranged on the inner circumferential surface of the fixing hole and used for allowing the operating tip and the operating cylinder to pass through, and the application has the effect of improving the reinforcement quality of the soft foundation.

Description

Technical Field

[0001] This application relates to the technical field of foundation reinforcement, and in particular to a soft foundation reinforcement device and construction method. Background Technology

[0002] Soft soil is a common type of soil, mainly found in coastal areas, plains, inland lake basins, depressions, and riverbanks. Soft soil is composed of silt deposits with high water content, high compressibility, low bearing capacity, and a small amount of humus.

[0003] Because soft soil has low bearing capacity, construction workers cannot carry out construction directly on soft soil foundations. Therefore, it is necessary to first reinforce the soft soil foundation to improve its consolidation and stability. Once the soft soil foundation becomes strong enough, construction can be carried out on it.

[0004] Existing soft soil foundation reinforcement equipment includes piles. After the piles are driven into the soft soil foundation, due to the poor stability of the connection between the pipe pile and the soft soil foundation, the pipe pile is prone to settlement of varying degrees, which affects the reinforcement quality of the soft soil foundation. Summary of the Invention

[0005] In order to improve the quality of soft soil foundation reinforcement, this application provides a soft soil foundation reinforcement equipment and construction method.

[0006] This application provides a soft foundation reinforcement device and construction method, which adopts the following technical solution: A soft foundation reinforcement device includes a plurality of pipe piles inserted into the soil, characterized in that: each pipe pile includes a pipe body, a pipe tip is provided at the bottom of the pipe body, a fixing hole is provided on the upper end face of the pipe body, and a barb structure for insertion into the soil is provided on the pipe body; the barb structure includes an operating frame provided on the inner circumferential surface of the pipe body, an operating rod is rotatably connected to the operating frame, an operating cylinder movable along the axis of the operating rod is sleeved on the operating rod, an operating groove is provided on the end face of the operating cylinder facing the axis of the pipe body, an operating tip is provided on the end face of the operating cylinder away from the axis of the pipe body, and a through hole is provided on the inner circumferential surface of the fixing hole for the operating tip and the operating cylinder to pass through.

[0007] By adopting the above technical solution, the pipe tip makes it easier to insert the pipe pile into the soft soil. After the pipe pile moves to the designated position in the soft soil foundation, the operating cylinder inside the pipe pile is driven to extend and insert into the soil, thereby improving the stability of the pipe pile in the soft soil foundation, making it less likely for the pipe pile to settle in the soft soil foundation, and improving the reinforcement quality of the soft soil foundation; the operating tip makes it easier for the operating cylinder to be inserted into the soil.

[0008] Optionally, a limiting groove is formed on the outer circumferential surface of the operating rod, the limiting groove extends along the axial direction of the through hole, and a limiting member is provided on the inner circumferential surface of the operating groove and arranged in the limiting groove; a spiral groove is formed on the outer circumferential surface of the operating cylinder, and a guide member is provided on the inner wall of the through hole for arrangement in the spiral groove.

[0009] By adopting the above technical solution, when the limiting component is arranged in the limiting groove, the limiting component can move in the limiting groove, so that the operating cylinder can move along the axis of the operating rod, and the operating cylinder and the operating rod can rotate synchronously; when the guide component is arranged in the spiral groove, it has a guiding function, and when the operating rod and the operating cylinder rotate, the operating cylinder can also move along the axis of the perforation; the operating cylinder rotates and extends out of the tube body, and the rotation makes it easier for the operating cylinder to be inserted into the soft soil foundation.

[0010] Optionally, the guide includes an operating wheel rotatably connected to the inner wall of the perforation, the operating wheel being arranged within a limiting groove.

[0011] By adopting the above technical solution, when the operating wheel is arranged in the spiral groove, the operating wheel can move in the spiral groove, playing a role in limiting and guiding. In addition, when the operating wheel is set, the rolling friction between the operating wheel and the spiral groove reduces the frictional damage between the two when under force when the operating lever moves relative to the operating rod.

[0012] Optionally, the limiting component includes two limiting plates disposed on the circumferential surface of the operating groove, a limiting block rotatably connected between the two limiting plates, a spring fixedly connected to the end face of the limiting block away from the axis of the operating groove, the spring fixedly connected away from the inner wall of the perforation, the spring being in a compressed state, and a slot for the limiting block to be inserted is provided on the bottom wall of the limiting groove, and a plurality of slots are distributed along the axial direction of the perforation.

[0013] By adopting the above technical solution, the end faces of the two limiting plates that are far apart from each other are in contact with the inner wall of the limiting groove, so that the operating rod can drive the operating cylinder to rotate synchronously when it rotates; when the operating cylinder moves along the axis of the operating rod, the spring applies a force to the limiting plate, causing the limiting plate to rotate towards the bottom wall of the limiting groove. When the slot is aligned with the limiting plate, the limiting plate can be embedded in the slot, making it difficult for the operating cylinder to move in the opposite direction, thus playing a limiting role.

[0014] Optionally, the pipe pile is provided with a driving component for driving the operating rod to rotate. The driving component includes a fixed plate disposed in a fixed hole and a driven bevel gear sleeved on the operating rod. A fixed rod is rotatably connected to the fixed plate, and a driving bevel gear is sleeved on the fixed rod. The driving bevel gear and the driven bevel gear mesh with each other.

[0015] By adopting the above technical solution, the fixed rod is driven to rotate, which in turn drives the active bevel gear to rotate. The active bevel gear meshes with the driven bevel gear, and the active bevel gear drives the driven bevel gear, the operating rod, and the operating cylinder to rotate together.

[0016] Optionally, the tube body has a receiving cavity that communicates with the perforation. The tube body has a drain hole and an exhaust hole at its top. A drain pipe is installed in the drain hole and extends to the bottom of the perforation. A drain pump is connected to the end face of the drain pipe outside the tube body. An exhaust pipe is installed in the exhaust hole and a vacuum pump is connected to the end face of the exhaust pipe outside the tube body.

[0017] By adopting the above technical solution, a vacuum pump is used to extract air from the accommodating cavity. After the air in the accommodating cavity is reduced, a pressure difference is formed between the accommodating cavity and the soil. Water in the soil enters the accommodating cavity. Then, a drainage pump is started to extract the water in the accommodating cavity, thereby reducing the water content in the soil and strengthening the soil.

[0018] Optionally, the end face of the operating rod facing the axis of the pipe body is rotatably connected to the grouting pipe, and the end face of the operating rod facing the bottom wall of the operating groove has an operating hole that connects to the grouting pipe. The end of the grouting pipe away from the operating rod extends out of the pipe body, and the end face of the grouting pipe away from the operating rod is connected to a grouting pump. The circumferential surface of the operating cylinder has a through hole that connects to the operating groove. When the through hole is located in the accommodating cavity, the operating rod does not block the through hole, and the operating cylinder extends out of the pipe body.

[0019] By adopting the above technical solution, the operating rod drives the operating cylinder to rotate together, so that the operating cylinder extends out of the pipe body and moves the through hole into the receiving cavity. The grouting pump delivers concrete slurry to the operating groove through the grouting pipe and the fixed rod. The concrete slurry in the operating groove is then delivered to the receiving cavity through the through hole. After the concrete slurry solidifies, the strength of the pile body is improved.

[0020] Optionally, the outer circumferential surface of the operating cylinder is provided with an installation ring groove, the installation ring groove is located at the end of the through hole away from the axis of the tube body, the bottom wall of the installation ring groove is provided with an installation hole communicating with the operating groove, an elastic layer is provided inside the installation ring groove, an air inlet is provided at the top of the tube body, an air inlet pipe is provided inside the air inlet, and an air pump is connected to the end face of the air inlet pipe outside the tube body.

[0021] By adopting the above technical solution, before the grouting process, the air pump is started to deliver air into the accommodating cavity. The air enters the accommodating groove through the through hole, and then enters the installation ring groove after passing through the through hole, the operating groove, and the air inlet hole. The air exerts a force on the elastic layer, causing the elastic layer to deform in a direction away from the axis of the operating cylinder. During subsequent grouting, the concrete slurry enters between the installation ring groove and the elastic layer. After the concrete slurry solidifies, it forms a concrete ring block, which further reinforces the soil.

[0022] A construction method for a soft foundation reinforcement device, the specific steps of which are as follows: Step 1: Drill pile holes in the soil using a drilling rig; Step 2: Install the pipe piles into the pile hole using pile driving equipment; Step 3: Use a vacuum pump to extract the air from the accommodating cavity, creating a pressure difference between the accommodating cavity and the soil. This pressure difference causes water in the soil to enter the accommodating cavity, which is then drained out using a drainage pump. Step 4: Drive the operating cylinder to extend outside the tube body, causing the elastic layer to move outside the tube body; Step 5: Inject air into the cavity using an air pump; the air causes the elastic layer to deform. Step six: The concrete grout is injected into the cavity using a grouting pump, and the concrete grout solidifies to form a concrete structure.

[0023] By adopting the above technical solution, air is extracted from the accommodating cavity by a vacuum pump, and water entering the accommodating cavity by a drainage pump, so that the operating cylinder extends out of the pipe body. Concrete slurry is then injected into the operating tank and the accommodating tank, allowing the concrete slurry to solidify and improving the stability of the operating cylinder in soft soil foundation.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The pipe tip makes it easier for the pipe pile to be inserted into soft soil. After the pipe pile is moved to the designated position in the soft soil foundation, the operating cylinder inside the pipe pile is driven to extend and insert into the soil, which improves the stability of the pipe pile in the soft soil foundation, makes the pipe pile less likely to settle in the soft soil foundation, and improves the reinforcement quality of the soft soil foundation; the operating tip makes it easier for the operating cylinder to be inserted into the soil. 2. An elastic layer is set up. After the operating groove is inflated, the elastic layer bulges away from the axis of the operating cylinder. When the grout is injected into the installation ring groove and solidifies, it forms a bulge shape, which improves the stability of the pipe pile in the soft soil foundation. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a schematic diagram highlighting the pipe pile structure; Figure 3This is a sectional view highlighting the pipe pile structure; Figure 4 yes Figure 3 An enlarged schematic diagram of part A in the middle; Figure 5 It is an exploded view highlighting the inverted hook structure; Figure 6 yes Figure 3 Enlarged schematic diagram of part B.

[0026] Reference numerals: 1. Pipe pile; 11. Pipe body; 111. Fixing hole; 112. Receiving cavity; 113. Perforation; 114. Membrane; 115. Exhaust hole; 116. Drainage hole; 117. Air inlet; 12. Pipe tip; 2. Hook structure; 21. Operating frame; 22. Operating rod; 221. Operating hole; 222. Limiting groove; 223. Slot; 23. Operating cylinder; 231. Operating tip; 232. Spiral groove; 233. Operating groove; 234. Mounting ring groove; 235. Mounting hole; 236. Elastic layer; 237. Through hole; 24. Guide component; 241. Operating wheel; 25. Limiting component; 251. Limiting block; 252. Limiting rod; 253. Limiting plate; 254. Spring; 3. Driving component; 31. Fixing plate; 32. Fixing rod; 33. Driving bevel gear; 34. Driven bevel gear; 4. Vacuum pump; 41. Exhaust pipe; 5. Drain pump; 51. Drain pipe; 6. Air pump; 61. Air inlet pipe; 7. Grouting pipe; 71. Grouting main pipe; 72. First grouting branch pipe; 73. Second grouting branch pipe; 8. Grouting pump. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0028] This embodiment discloses a soft foundation reinforcement device and construction method. (Refer to...) Figure 1 A soft foundation reinforcement device includes several pipe piles 1, all of which are inserted into the soil.

[0029] Reference Figure 2 and Figure 3 The pipe pile 1 includes a pipe body 11, a pipe tip 12, a barb structure 2, and a driving component 3. A fixing hole 111 is provided on the upper end face of the pipe body 11, and the pipe tip 12 is fixedly connected to the lower end face of the pipe body 11. The pipe tip 12 helps the pipe pile 1 to be inserted into the soil. A receiving cavity 112 is provided inside the pipe body 11.

[0030] Reference Figure 3 and Figure 4The tube body 11 has three perforation groups arranged in an array along the axial direction of the tube body 11. Each perforation group 113 includes four perforations 113, which are arranged in a circumferential array along the axial direction of the tube body 11. The perforations 113 are formed on the circumferential surface of the tube body 11, and the receiving cavity 112 and the fixing hole 111 are both connected to the perforations 113. A membrane 114 is fixedly connected inside the perforations 113, and the membrane 114 is located between the receiving cavity 112 and the fixing hole 111. In other embodiments, the perforation groups can be two, four, or other numbers, and each perforation group can have two, three, or other numbers of perforations 113.

[0031] Reference Figure 4 and Figure 5 The barb structure 2 is provided in several parts, and the number of barb structures 2 is the same as the number of through holes 113. The barb structure 2 includes an operating frame 21, an operating rod 22, an operating cylinder 23, a guide member 24, and a limiting member 25.

[0032] Reference Figure 4 and Figure 5 An operating cylinder 23 is inserted into a perforation 113. The outer diameter of the operating cylinder 23 is the same as the inner diameter of the perforation 113. An operating tip 231 is fixedly connected to the end face of the operating cylinder 23 away from the tube body 11. In the initial state, the operating tip 231 is located on the side of the membrane 114 away from the receiving cavity 112.

[0033] Reference Figure 4 and Figure 5 Two spiral grooves 232 are formed on the outer circumferential surface of the operating cylinder 23, and the two spiral grooves 232 are arranged in a circumferential array along the axis of the operating cylinder 23. Two guide members 24 are provided, both of which are set on the inner wall of the through hole 113, and both guide members 24 are located between the accommodating cavity 112 and the fixing hole 111.

[0034] Reference Figure 4 and Figure 5 In this application, the guide member 24 is an operating wheel 241, which is rotatably connected to the inner wall of the through hole 113 and arranged within the spiral groove 232. When the operating cylinder 23 rotates, the operating wheel 241 slides within the spiral groove 232. The operating wheel 241 can rotate during sliding, reducing friction between the operating wheel 241 and the inner wall of the spiral groove 232, thus reducing wear on both. In other embodiments, the guide rod can also be a cylindrical slider arranged within the groove.

[0035] Reference Figure 4 and Figure 5The operating cylinder 23 has an operating groove 233 facing the axis of the tube body 11, and an installation annular groove 234 is formed on the outer circumferential surface of the operating cylinder 23. The installation annular groove 234 is located at one end of the spiral groove 232 near the operating tip 231. Two installation holes 235 are formed on the bottom wall of the installation annular groove 234. The two installation holes 235 are arranged in a circumferential array along the axis of the operating cylinder 23, and both installation holes 235 communicate with the operating groove 233. In other embodiments, the installation holes 235 may be three, four, or other numbers.

[0036] Reference Figure 4 and Figure 5 An elastic layer 236 is provided within the mounting annular groove 234, and both inner walls of the mounting annular groove 234 along the axis of the operating cylinder 23 are fixedly connected to the elastic layer 236. Two through holes 237 are formed on the outer circumferential surface of the operating cylinder 23, and are arranged in a circumferential array along the axis of the operating cylinder 23. Both through holes 237 communicate with the operating groove 233. In other embodiments, the through holes 237 may be three, four, or other quantities.

[0037] Reference Figure 5 and Figure 6 Two limiting members 25 are provided on the inner wall of the operating groove 233, and the two limiting members 25 are arranged in a circumferential array along the axis of the operating cylinder 23. The operating rod 22 passes through the operating groove 233, and the end face of the operating rod 22 facing the bottom wall of the operating groove 233 has an operating hole 221.

[0038] Reference Figure 5 and Figure 6 Two limiting grooves 222 are formed on the outer circumferential surface of the limiting rod 252, and the two limiting grooves 222 are arranged in a circular array along the axis of the operating rod 22. The length direction of the limiting grooves 222 is the same as the axis of the operating rod 22. The limiting grooves 222 are for the insertion of the limiting member 25.

[0039] Reference Figure 5 and Figure 6 The limiting component 25 includes a limiting block 251, a limiting rod 252, a limiting plate 253, and a spring 254. Two limiting blocks 251 are provided, fixedly connected to the inner wall of the operating groove 233, and parallel to each other. The far-away end faces of the two limiting blocks 251 are in contact with the interior of the limiting groove 222. Limiting holes are formed on the near-away end faces of the two limiting blocks 251, and the limiting rod 252 is rotatably connected within these holes. The axis of the limiting rod 252 is perpendicular to the axis of the operating groove 233.

[0040] Reference Figure 6A limiting plate 253 is fitted over the limiting rod 252. A spring 254 is located on the side of the limiting rod 252 near the opening of the operating groove 233. One end of the spring 254 is fixedly connected to the inner wall of the operating groove 233, and the other end of the spring 254 is fixedly connected to the end face of the limiting plate 253 away from the axis of the operating groove 233. When the spring 254 is in a compressed state, the limiting plate 253 abuts against the bottom wall of the operating groove 233.

[0041] Reference Figure 6 The bottom wall of the limiting groove 222 is provided with a plurality of slots 223, which are arranged in an array along the axial direction of the operating rod 22. The slots 223 allow the limiting plate 253 to be inserted. When the limiting plate 253 is inserted into the slot 223, the bottom wall of the operating groove 233 is not easily moved toward the operating rod 22.

[0042] Reference Figure 3 and Figure 6 The operating frame 21 is fixedly connected to the inner wall of the fixing hole 111, and the limiting rod 252 is rotatably connected to the operating frame 21.

[0043] Reference Figure 3 The driving component 3 is used to drive the operating lever 22 to rotate. The driving component 3 includes a fixed plate 31, a fixed rod 32, a driving bevel gear 33, and a driven bevel gear 34. The fixed plate 31 is fixedly connected to the inner wall of the fixed hole 111 and is located above all the barbed structures 2.

[0044] Reference Figure 3 The fixed rod 32 is rotatably connected to the fixed plate 31. The fixed rod 32 can be driven by a motor. Three driving bevel gears 33 are provided, and the three driving bevel gears 33 are sleeved on the fixed rod 32. The three driving bevel gears 33 are arranged in an array along the axial direction of the fixed rod 32. Twelve driven bevel gears 34 are provided, and each driven bevel gear 34 corresponds to one fixed rod 32. The driven bevel gear 34 is sleeved on the outside of the fixed rod 32 and meshes with the driving bevel gears 33.

[0045] Reference Figure 3 and Figure 4The fixed rod 32 rotates, causing the driven bevel gear 34 to rotate. The driven bevel gear 34 drives the driving bevel gear 33 and the operating rod 22 to rotate. The rotation of the operating rod 22 causes the operating cylinder 23 to rotate synchronously. Due to the limiting effect of the operating wheel 241, the operating cylinder 23 moves away from the axis of the tube body 11 while rotating, causing the operating tip 231 to puncture the membrane 114. When the operating wheel 241 contacts the inner wall of the spiral groove 232 near the axis of the tube body 11, the operating cylinder 23 blocks the through hole 113. The through hole 237 is located inside the accommodating cavity 112. The operating rod 22 does not block the through hole 237, and the elastic layer 236 moves to the outside of the tube body 11. After the operating cylinder 23 blocks the through hole 113, air leakage is reduced when the air pump 6 inflates the accommodating cavity 112 and the operating groove 233.

[0046] Reference Figure 2 and Figure 3 The upper end face of the pipe body 11 has an exhaust hole 115, which communicates with the accommodating cavity 112. A vacuum pump 4 is installed on the soil, and the vacuum pump 4 is connected to an exhaust pipe 41. The exhaust pipe 41 passes through the exhaust hole 115 and is located above all the perforations 113. In this application, the lower end face of the exhaust pipe 41 is coplanar with the upper inner wall of the accommodating cavity 112. When the vacuum pump 4 is started, it extracts the air from the accommodating cavity 112. When the air in the accommodating cavity 112 decreases, a pressure difference is created between the accommodating cavity 112 and the soil, causing water in the soil to enter the accommodating cavity 112.

[0047] Reference Figure 2 and Figure 3 A drainage hole 116 is provided on the upper end face of the pipe body 11, and the drainage hole 116 communicates with the receiving cavity 112. A drainage pump 5 is installed on the soil, and the drainage pump 5 is connected to a drainage pipe 51. The drainage pipe 51 passes through the drainage hole 116, and all the through holes 113 are higher than the lower end face of the drainage pipe 51. When water in the soil enters the receiving cavity 112 and overflows the drainage hole 116, the drainage pump 5 starts to pump out the water from the receiving cavity 112. Reference Figure 2 An air inlet 117 is provided on the upper end face of the pipe body 11, and the air inlet 117 communicates with the accommodating cavity 112. An air pump 6 is installed on the soil, and the air pump 6 is connected to an air inlet pipe 61, which passes through the air inlet 117 and is located above all the perforations 113. In this application, the lower end face of the air inlet pipe 61 is coplanar with the upper inner wall of the accommodating cavity 112. The air pump 6 is fixedly connected to the end face of the air inlet pipe 61 located outside the pipe body 11, and the air pump 6 is installed on the soil.

[0048] Reference Figure 2 and Figure 3The grouting pipeline 7 includes a main grouting pipe 71, first grouting branch pipes 72, and second grouting branch pipes 73. The main grouting pipe 71 is located outside the pipe body 11. Four first grouting branch pipes 72 are provided, and all four first grouting branch pipes 72 are connected to the main grouting pipe 71. Each first grouting branch pipe 72 has three second grouting branch pipes 73 along its length. The second grouting branch pipes 73 are aligned with the operating rod 22 and are rotatably connected to the operating rod 22. A grouting pump 8 is fixedly connected to the end of the main grouting pipe 71 away from the first grouting branch pipes 72. The grouting pump 8 is located on the soil.

[0049] A construction method for a soft foundation reinforcement device, the specific steps of which are as follows: Step 1: Drill pile holes in the soil using a drilling rig; Step 2: Install pipe pile 1 into the pile hole using pile driving equipment; Step 3: The air in the accommodating cavity 112 is extracted by the vacuum pump 4, so that a pressure difference is formed between the accommodating cavity 112 and the soil. Water in the soil enters the accommodating cavity 112 due to the pressure difference, and the water in the accommodating cavity 112 is extracted by the drainage pump 5. Step 4: Drive the operating cylinder 23 to extend outside the tube body 11, so that the elastic layer 236 moves outside the tube body 11; Step 5: Air is injected into the accommodating cavity 112 by the air pump 6, and the air drives the elastic layer 236 to deform. Step six: The concrete grout is injected into the accommodating cavity 112 by the grouting pump 8, and the concrete grout solidifies to form a concrete structure.

[0050] The implementation principle of the soft soil foundation reinforcement equipment and construction method in this application embodiment is as follows: First, a pressure difference is formed between the accommodating cavity 112 and the soil, so that water in the soft soil foundation enters the accommodating cavity 112. The drainage pump 5 extracts the water in the accommodating cavity 112, so that the water in the soft soil foundation is continuously reduced. The operating cylinder 23 is driven to extend out of the pipe body 11 to improve the stability of the pipe pile 1 in the soft soil foundation. Then, concrete grout is filled into the accommodating cavity 112 to complete the installation of the pipe pile 1.

[0051] The above description is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of this application should be included within the protection scope of this application.

Claims

1. A soft foundation reinforcement device, comprising a plurality of pipe piles (1) inserted into the soil, characterized in that: The pipe pile (1) includes a pipe body (11), a pipe tip (12) is provided at the bottom of the pipe body (11), a fixing hole (111) is provided on the upper end face of the pipe body (11), and a barb structure (2) for insertion into the soil is provided on the pipe body (11); the barb structure (2) includes an operating frame (21) provided on the inner circumferential surface of the pipe body (11), an operating rod (22) is rotatably connected to the operating frame (21), an operating cylinder (23) that can move along the axis of the operating rod (22) is provided on the operating rod (22), an operating groove (233) is provided on the end face of the operating cylinder (23) facing the axis of the pipe body (11), an operating tip (231) is provided on the end face of the operating cylinder (23) away from the axis of the pipe body (11), and a through hole (113) is provided on the inner circumferential surface of the fixing hole (111) for the operating tip (231) and the operating cylinder (23) to pass through; The tube body (11) has a receiving cavity (112) inside, which is connected to the perforation (113). The tube body (11) has a drain hole (116) and an exhaust hole (115) above it. A drain pipe (51) is provided in the drain hole (116) and extends to the bottom of the perforation (113). A drain pump (5) is connected to the end face of the drain pipe (51) outside the tube body (11). An exhaust pipe (41) is provided in the exhaust hole (115) and a vacuum pump (4) is connected to the end face of the exhaust pipe (41) outside the tube body (11). The operating rod (22) is rotatably connected to the grouting pipe (7) at the end face facing the axis of the pipe body (11). The operating rod (22) has an operating hole (221) for communicating with the grouting pipe (7) at the end face facing the bottom wall of the operating groove (233). The end of the grouting pipe (7) away from the operating rod (22) extends out of the pipe body (11). The end face of the grouting pipe (7) away from the operating rod (22) is connected to the grouting pump (8). The circumferential surface of the operating cylinder (23) has a through hole (237) for communicating with the operating groove (233). When the through hole (237) is located in the accommodating cavity (112), the operating rod (22) does not block the through hole (237), and the operating cylinder (23) extends out of the pipe body (11).

2. The soft foundation reinforcement device according to claim 1, characterized in that: A limiting groove (222) is provided on the outer circumferential surface of the operating rod (22), the limiting groove (222) extends along the axial direction of the through hole (113), and a limiting member (25) arranged in the limiting groove (222) is provided on the inner circumferential surface of the operating groove (233); a spiral groove (232) is provided on the outer circumferential surface of the operating cylinder (23), and a guide member (24) for being arranged in the spiral groove (232) is provided on the inner wall of the through hole (113).

3. The soft foundation reinforcement device according to claim 2, characterized in that: The guide (24) includes an operating wheel (241) rotatably connected to the inner wall of the perforation (113), the operating wheel (241) being arranged in the limiting groove (222).

4. The soft foundation reinforcement device according to claim 2, characterized in that: The limiting member (25) includes two limiting plates (253) disposed on the circumferential surface of the operating groove (233). A limiting block (251) is rotatably connected between the two limiting plates (253). A spring (254) is fixedly connected to the end face of the limiting block (251) away from the axis of the operating groove (233). The spring (254) is fixedly connected away from the inner wall of the through hole (113). The spring (254) is in a compressed state. A slot (223) for the limiting block (251) to be inserted is opened on the bottom wall of the limiting groove (222). Several slots (223) are distributed along the axial direction of the through hole (113).

5. The soft foundation reinforcement device according to claim 4, characterized in that: The pipe pile (1) is provided with a driving component (3) for driving the operating rod (22) to rotate. The driving component (3) includes a fixing plate (31) disposed in the fixing hole (111) and a driven bevel gear (34) sleeved on the operating rod (22). A fixing rod (32) is rotatably connected to the fixing plate (31). A driving bevel gear (33) is sleeved on the fixing rod (32). The driving bevel gear (33) and the driven bevel gear (34) mesh with each other.

6. The soft foundation reinforcement device according to claim 1, characterized in that: The outer circumferential surface of the operating cylinder (23) is provided with an installation ring groove (234). The installation ring groove (234) is located at one end of the through hole (237) away from the axis of the tube body (11). The bottom wall of the installation ring groove (234) is provided with an installation hole (235) that connects to the operating groove (233). An elastic layer (236) is provided inside the installation ring groove (234). An air inlet hole (117) is provided above the tube body (11). An air inlet pipe (61) is provided inside the air inlet hole (117). An air pump (6) is connected to the end face of the air inlet pipe (61) outside the tube body (11).

7. A construction method using the soft foundation reinforcement equipment described in claim 6, characterized in that: Includes the following steps: Step 1: Drill pile holes in the soil using a drilling rig; Step 2: Install the pipe pile (1) into the pile hole using a pile driving device; Step 3: The air in the accommodating cavity (112) is extracted by the vacuum pump (4) to create a pressure difference between the accommodating cavity (112) and the soil, so that the water in the soil enters the accommodating cavity (112) due to the pressure difference, and the water in the accommodating cavity (112) is extracted by the drainage pump (5). Step 4: Drive the operating cylinder (23) to extend outside the tube body (11) so that the elastic layer (236) moves outside the tube body (11); Step 5: Inflate the cavity (112) with an air pump (6) and the air causes the elastic layer (236) to deform. Step 6: The concrete grout is injected into the accommodating cavity (112) by the grouting pump (8), and the concrete grout solidifies to form a concrete structure.

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