Subway tunnel soft soil foundation reinforcing structure and using method thereof
By designing the soft soil foundation reinforcement structure of the subway tunnel, and using compensation reinforcement mechanisms and reinforcement steel ropes, the problem of soil settlement during the operation of the subway tunnel is solved, and the safety and stability of the subway operation are achieved.
Patent Information
- Application Number
- CN202411840004.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During operation, subway tunnels create pressure on the soil below, causing soil settlement and affecting the safety of subway operation.
A soft soil foundation reinforcement structure in subway tunnels is designed, including the tunnel main body, support foundation, support column, compensation and reinforcement mechanism and reinforcement steel rope. By setting up a compensation reinforcement mechanism and reinforcement steel rope, the support area is increased and the soil pressure is reduced to avoid settlement of the tunnel main body.
It effectively avoids the settlement of the tunnel body in the easily settled area, increases the soil structure strength, ensures the safety of subway operation, and reduces vibration during subway operation through the buffer mechanism.
Smart Images
Figure CN119641358A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of subway tunnel anti-settlement, and in particular to a subway tunnel soft soil foundation reinforcement structure and a use method thereof. Background Art
[0002] The more prosperous the economy is, the more people will move into the city, which will lead to the continuous increase of urbanization. The large increase in urban population has led to increased traffic pressure on urban roads. Coupled with the rapid development of my country's automobile industry in recent years, cars have gradually become popular, further causing urban traffic congestion. For this reason, engineers began to choose subways as a new urban transportation, which can greatly alleviate the ground traffic situation. However, the underground soil conditions are complicated, especially the soil in some river and lake areas is relatively loose, and the tunnels are relatively heavy. When the subway is running, the tunnel increases the pressure on the soil below. Even if the soil is reinforced, settlement will occur after a period of time, which will cause harm to the operation of the subway. Summary of the invention
[0003] The object of the present invention is to provide a subway tunnel soft soil foundation reinforcement structure and a use method thereof to solve the problems raised in the above background technology.
[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a subway tunnel soft soil foundation reinforcement structure, comprising a tunnel body, a supporting foundation is arranged in the middle of the interior of the tunnel body, a supporting column is arranged at the lower end of the supporting foundation, an adjusting screw is arranged in the middle of the supporting column, a drilling head is fixedly connected to the lower end of the supporting column, a connecting box is arranged at the lower end of the tunnel body, both ends of the supporting column pass through the connecting box, mounting grooves are arranged on both sides of the supporting column, a compensating reinforcement mechanism is arranged at the mounting groove, the compensating reinforcement mechanism consists of a compensating rod, a blocking head, an extrusion plate and a blocking column, a transmission gear and a first guide wheel are rotatably connected in the connecting box, reinforcing columns are arranged on both sides of the tunnel body, the reinforcing columns are hollow inside, and a second guide wheel is rotatably connected in the middle of the reinforcing columns Wheel, a third guide wheel is provided on the outer wall of the reinforcing column, a fourth guide wheel is provided in the middle of the upper end of the reinforcing column, and a reinforcing steel rope is provided between the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel, and the reinforcing steel rope is provided in the middle of the reinforcing column. Two fixing plates are fixedly connected in the middle of the reinforcing column, a fixing column is provided in the middle of the two fixing plates, a connecting block is fixedly connected in the middle of the fixing column, and clamping grooves are provided on both sides of the connecting block, and a settlement blocking mechanism is provided at the tail end of the fixing column, and the settlement blocking mechanism is composed of a blocking wheel, a clamping protrusion, a connecting screw, a sliding block, a plug-in groove, and a spring sheet, and the front end of the fixing column is fixedly connected to the connecting column, and a locking and fixing mechanism is provided at the front end of the connecting column, and the locking and fixing mechanism is composed of a rotating plate, a limit block, a sliding groove, a support block, an auxiliary block and a locking clamping plate.
[0005] Preferably, the upper diameter of the drilling head is larger than the diameter of the support column, the interior of the support column is hollow, the mounting groove and the hollow portion of the support column are connected, the lower end of the adjusting screw is rotatably connected to the support column, and the upper end of the adjusting screw passes through the supporting foundation.
[0006] Preferably, the extrusion plate and the adjusting screw are threadedly connected, and the extrusion plate moves vertically inside the support column, there is a gap between the extrusion plate and the support column, the blocking head is fixedly connected to the upper end of the compensation rod, there is an angle between the blocking head and the compensation rod, and the blocking head rests against the bottom of the extrusion plate.
[0007] Preferably, a rotating shaft is provided at the connection between the blocking head and the compensation rod, the compensation rod is rotatably connected to the rotating shaft, the blocking column is fixedly connected to the middle of the mounting groove, the side end of the compensation rod abuts against the blocking column, and there is an angle between the compensation rod and the support column. When the compensation rod is in the initial state, the lower end of the compensation rod is retracted above the drilling head.
[0008] Preferably, a plurality of engaging teeth are provided on the outer walls on both sides of the support column, a snap-in rack is fixedly connected in the middle of the reinforcing steel rope, the snap-in rack is located at the first guide wheel, the transmission gear is respectively meshed with the snap-in rack and the engaging teeth, and the second guide wheel and the fourth guide wheel are located on the same vertical line.
[0009] Preferably, the support block is fixedly connected to the front end of the connecting column, the side end of the support block is an arc-shaped structure, the auxiliary block is fixedly connected to the top end of the support block, the top end of the rotating plate and the auxiliary block are rotatably connected, the locking card plate is fixedly connected to the lower end of the rotating plate, the locking card plate is an arc-shaped structure, and the reinforcement steel rope is clamped between the locking card plate and the support block.
[0010] Preferably, a movable plate is inserted in the card-joining groove, and the movable plate is a U-shaped structure. A reset spring is fixedly connected between the middle of the lower end of the movable plate and the connecting block. The upper end of the movable plate is rotatably connected to an auxiliary wheel. The rotating plate is tilted, and the middle of the rotating plate is located at the upper end of the auxiliary wheel. The limit block is fixedly connected to the upper end of the connecting column, and a sliding groove is provided in the middle of the limit block, and both ends of the rotating plate pass through the sliding groove.
[0011] Preferably, the connecting screw is threadedly connected to the tail end of the fixing column, the blocking wheel and the connecting screw are rotatably connected, the side end surface of the blocking wheel is an arc-shaped groove structure, the snap-in protrusion is located at the arc-shaped surface of the blocking wheel, the snap-in protrusion is arranged around the blocking wheel, and the side end of the snap-in protrusion is an arc-shaped structure.
[0012] Preferably, a plurality of reinforcing plates are fixedly connected to the side ends of the fixed plate, the reinforcing plates are arc-shaped structures, the reinforcing plates are elastic plates, the elastic coefficients of the reinforcing plates gradually increase from left to right, a sliding block is fixedly connected to the lower end of the reinforcing plate, a plug-in groove is provided at the side end of the sliding block, and the snap-in protrusion and the plug-in groove are snap-fitted to each other.
[0013] A method for using the subway tunnel soft soil foundation reinforcement structure according to any one of claims 1 to 4, comprising the following steps: Step 1: Determine the area where soil is prone to settlement, and set two reinforcement columns and a connection box at the area where soil is prone to settlement. The two reinforcement columns are set on both sides of the tunnel body, and the connection box is set at the lower end of the tunnel body; Step 2: Set up a traction structure, drill holes in the connection box, drill the holes through the reinforcement column, and set the first guide wheel, the second guide wheel, the third guide wheel and the fourth guide wheel at the connection box and the reinforcement column, connect the reinforcement steel rope to the guide wheel, and suspend the tunnel body with the reinforcement steel rope to prevent the tunnel body from settling in the settlement-prone area; Step 3: Set up a blocking and buffering mechanism, set up a settlement blocking mechanism and a locking reinforcement mechanism in the reinforcement column, and connect the support block and the locking card plate with the reinforcement steel rope by turning the rotating plate, so that the reinforcement steel rope is connected to the buffering mechanism to buffer the vibration generated when the subway is running; Step 4: Set up the support mechanism, insert the support column into the soil, and rotate the compensation rod to create an angle between the compensation rod and the support column. Then pour concrete into the soil through the support column to fill the gaps. At the same time, increase the structural strength of the soil in areas prone to settlement to avoid settlement during subway operation.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a compensation reinforcement mechanism, the compensation rod is rotated during installation so that a certain angle exists between the compensation rod and the support column, thereby increasing the support area. When the tunnel body settles, the compensation rod will be pressed down, and the compensation rod can support the tunnel body. At the same time, concrete will be poured through the support column, thereby increasing the soil structure strength in the settlement-prone area and avoiding the settlement of the tunnel body. Second, set up reinforcement columns on both sides of the tunnel body, and use reinforced steel ropes to pull the tunnel body, thereby reducing the pressure of the tunnel body on the soil layer below and reducing the probability of tunnel body settlement; 3. By clamping the limit blocks and locking plates with the reinforcing steel ropes, the fixed columns and the reinforcing steel ropes are connected into a whole to cushion the vibrations generated during the operation of the subway. When the vibration or settlement of the tunnel body exceeds the design value, the reinforcement sheet will be severely deformed and even broken in severe cases. By observing the condition of the reinforcement sheet, the condition of the tunnel body can be accurately judged, and the operator can determine whether to stop the operation of the subway to ensure safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Schematic diagram of the tunnel main body reinforcement connection.
[0016] Figure 2 This is an enlarged schematic diagram of point A.
[0017] Figure 3 This is an enlarged schematic diagram of point B.
[0018] Figure 4 It is a schematic diagram of the connection between the settlement blocking mechanism and the fixed column.
[0019] Figure 5 It is a schematic diagram of the connection between the locking fixing mechanism and the fixing column.
[0020] In the figure: 1 tunnel body, 2 supporting foundation, 3 supporting column, 4 reinforcing column, 5 connecting box, 6 transmission gear, 7 first guide wheel, 8 clamping rack, 9 engaging tooth, 10 second guide wheel, 11 third guide wheel, 12 fourth guide wheel, 13 reinforcing steel rope, 14 fixing column, 15 fixing plate, 16 drilling head, 17 adjusting screw, 18 mounting groove, 19 compensation reinforcement mechanism, 191 compensation rod, 192 blocking head, 193 extrusion plate, 194 Blocking column, 20 connecting block, 21 snap-in groove, 22 moving plate, 23 auxiliary wheel, 24 return spring, 25 sedimentation blocking mechanism, 251 blocking wheel, 252 snap-in protrusion, 253 connecting screw, 254 sliding block, 255 plug-in groove, 256 reinforcing sheet, 26 connecting column, 27 locking and fixing mechanism, 271 rotating plate, 272 limiting block, 273 sliding groove, 274 supporting block, 275 auxiliary block, 276 locking card plate. DETAILED DESCRIPTION
[0021] In order to deepen the understanding and recognition of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described and introduced in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the embodiments in any form. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0022] See also Figure 1-5The present invention provides a technical solution: a subway tunnel soft soil foundation reinforcement structure, comprising a tunnel body 1, a supporting foundation 2 is arranged in the middle of the tunnel body 1, a supporting column 3 is arranged at the lower end of the supporting foundation 2, an adjusting screw 17 is arranged in the middle of the supporting column 3, a drilling head 16 is fixedly connected to the lower end of the supporting column 3, a connecting box 5 is arranged at the lower end of the tunnel body 1, both ends of the supporting column 3 pass through the connecting box 5, both sides of the supporting column 3 are provided with mounting grooves 18, a compensating reinforcement mechanism 19 is arranged at the mounting groove 18, the compensating reinforcement mechanism 19 is composed of a compensating rod 191, a blocking head 192, an extrusion plate 193 and a blocking column 194, a transmission gear 6 and a first guide wheel 7 are rotatably connected in the connecting box 5, reinforcing columns 4 are arranged on both sides of the tunnel body 1, the reinforcing columns 4 are hollow inside, a second guide wheel 10 is rotatably connected in the middle of the reinforcing columns 4, and a third guide wheel 11 is arranged on the outer side wall of the reinforcing column 4, and the reinforcement A fourth guide wheel 12 is provided in the middle of the upper end of the strong column 4, and a reinforcing steel rope 13 is provided between the first guide wheel 7, the second guide wheel 10, the third guide wheel 11 and the fourth guide wheel 12. Two fixed plates 15 are fixedly connected in the middle of the reinforcing column 4, and a fixed column 14 is provided in the middle of the two fixed plates 15. A connecting block 20 is fixedly connected in the middle of the fixed column 14, and a clamping groove 21 is provided on both sides of the connecting block 20. A settlement blocking mechanism 25 is provided at the tail end of the fixed column 14, and the settlement blocking mechanism 25 is composed of a blocking wheel 251, a clamping protrusion 252, a connecting screw 253, a sliding block 254, a plug-in groove 255, and a spring sheet. A connecting column 26 is fixedly connected to the front end of the fixed column 14, and a locking and fixing mechanism 27 is provided at the front end of the connecting column 26. The locking and fixing mechanism 27 is composed of a rotating plate 271, a limit block 272, a sliding groove 273, a support block 274, an auxiliary block 275 and a locking clamping plate 276.
[0023] like Figure 3As shown, the upper diameter of the drilling head 16 is larger than the diameter of the support column 3, the interior of the support column 3 is hollow, the mounting groove 18 and the hollow part of the support column 3 are connected, the lower end of the adjusting screw 17 is rotatably connected to the support column 3, the upper end of the adjusting screw 17 passes through the supporting foundation 2, the extrusion plate 193 is threadedly connected to the adjusting screw 17, and the extrusion plate 193 moves vertically inside the support column 3, and there is a gap between the extrusion plate 193 and the support column 3, the blocking head 192 is fixedly connected to the upper end of the compensation rod 191, there is an angle between the blocking head 192 and the compensation rod 191, the blocking head 192 abuts against the bottom of the extrusion plate 193, a rotating shaft is provided at the connection between the blocking head 192 and the compensation rod 191, the compensation rod 191 is rotatably connected to the rotating shaft, the blocking column 194 is fixedly connected to the middle of the mounting groove 18, and the side end of the compensation rod 191 abuts against the blocking column 194 There is an angle between the compensation rod 191 and the support column 3. When the compensation rod 191 is in the initial state, the lower end of the compensation rod 191 is retracted above the drilling head 16. The support column 3 is arranged at the lower end of the tunnel body 1, and the tunnel body 1 and the supporting foundation 2 are supported by the support column 3. The support column 3 is inserted into the soil through the drilling head 16. After the support column 3 is installed, the adjusting screw 17 is rotated, and the adjusting screw 17 drives the extrusion plate 193 to move downward, and the extrusion plate 193 squeezes the blocking head 192, thereby controlling the rotation of the compensation rod 191 and increasing the supporting area of the tunnel body 1. After the compensation rod 191 is opened, concrete is poured into the interior of the support column 3, thereby filling the gap generated during the opening of the compensation rod 191. At the same time, it can also increase the soil structure strength in the area prone to settlement, thereby ensuring the safety of the tunnel body 1.
[0024] like Figure 1 As shown, a plurality of engaging teeth 9 are provided on the outer walls on both sides of the support column 3, and a snap-in rack 8 is fixedly connected in the middle of the reinforcing steel rope 13. The snap-in rack 8 is located at the first guide wheel 7, and the transmission gear 6 is respectively meshed with the snap-in rack 8 and the engaging teeth 9. The second guide wheel 10 and the fourth guide wheel 12 are located on the same vertical line. The tunnel body 1 is pulled by the reinforcing steel rope 13 to reduce the pressure of the tunnel body 1 on the soil below and avoid the settlement of the tunnel body 1. At the same time, it can also buffer the vibration generated during the operation of the subway to ensure the safety of the subway. When the tunnel body 1 moves downward, the support column 3 will drive the transmission gear 6 to rotate through the meshing teeth 9, and the transmission gear 6 will mesh with the snap-in rack 8, thereby pulling the reinforcing steel rope 13 to move.
[0025] like Figure 5As shown, the support block 274 is fixedly connected to the front end of the connecting column 26, the side end of the support block 274 is an arc-shaped structure, the auxiliary block 275 is fixedly connected to the top of the support block 274, the top of the rotating plate 271 is rotatably connected to the auxiliary block 275, the locking card plate 276 is fixedly connected to the lower end of the rotating plate 271, the locking card plate 276 is an arc-shaped structure, the reinforcing steel rope 13 is clamped between the locking card plate 276 and the support block 274, the movable plate 22 is inserted into the clamping groove 21, the movable plate 22 is a U-shaped structure, a return spring 24 is fixedly connected between the middle of the lower end of the movable plate 22 and the connecting block 20, the upper end of the movable plate 22 is rotatably connected to the auxiliary wheel 23, the rotating plate 271 is tilted, the middle of the rotating plate 271 is located at the upper end of the auxiliary wheel 23, the limit block 272 is fixedly connected to the connecting column The upper end of 26, the middle of the limit block 272 is provided with a sliding groove 273, and the two ends of the rotating plate 271 pass through the sliding groove 273. By pressing the rotating plate 271 downward, the rotating plate 271 squeezes the movable plate 22, so that the movable plate 22 moves downward, and the movable plate 22 compresses and accumulates force on the return spring 24 when moving, and the rotating plate 271 drives the locking card plate 276 to move, so as to facilitate the locking card plate 276 and the support block 274 to be clamped with the reinforcing steel rope 13, so as to connect the fixed column 14 and the reinforcing steel rope 13 into a whole. When the steel rope body 13 is clamped, the rotating plate 271 is reset under the action of the return spring 24, and the limit block 272 limits the movement of the rotating plate 271. When the reinforcing steel rope 13 is pulled, it will drive the fixed column 14 to move together.
[0026] The connecting screw 253 is threadedly connected to the tail end of the fixed column 14, the blocking wheel 251 and the connecting screw 253 are rotatably connected, the side end surface of the blocking wheel 251 is an arc-shaped groove structure, the clamping protrusion 252 is located at the arc-shaped surface of the blocking wheel 251, the clamping protrusion 252 is arranged around the blocking wheel 251, the side end of the clamping protrusion 252 is an arc-shaped structure, and the side end of the fixed plate 15 is fixedly connected with a plurality of reinforcing sheets 256, the reinforcing sheets 256 are arc-shaped structures, the reinforcing sheets 256 are elastic sheets, and the elastic coefficient of the reinforcing sheets 256 from left to right gradually increases, and the lower end of the reinforcing sheet 256 is fixedly connected with a sliding block 254, the sliding block A plug-in groove 255 is provided at the side end of 254, and the snap-in protrusion 252 and the plug-in groove 255 are snap-fitted to each other. The snap-in protrusion 252 at the side end of the blocking wheel 251 is snap-fitted into the plug-in groove 255 at different positions. When the fixed column 14 moves, it will drive the blocking wheel 251 to move, thereby squeezing the sliding block 254. The reinforcement sheet 256 buffers the vibration generated during the operation of the subway. When the tunnel body 1 sinks, it will cause a large deformation of the reinforcement sheet 256. When the maintenance personnel observe this phenomenon, they need to stop the operation of the subway immediately and maintain the tunnel body 1 at the same time to ensure the safety of the tunnel body 1.
[0027] A method for using a subway tunnel soft soil foundation reinforcement structure, comprising the following steps: Step 1: Determine the area where soil is prone to settlement, and set two reinforcement columns 4 and a connection box 5 at the area where soil is prone to settlement. The two reinforcement columns 4 are set on both sides of the tunnel body 1, and the connection box 5 is set at the lower end of the tunnel body 1; Step 2: Set up a traction structure, drill holes in the connection box 5, drill the holes into the reinforcement column 4, and set the first guide wheel 7, the second guide wheel 10, the third guide wheel 11 and the fourth guide wheel 12 at the connection box 5 and the reinforcement column 4, connect the reinforcement steel rope 13 with the guide wheel, and suspend the tunnel body 1 with the reinforcement steel rope 13 to prevent the tunnel body 1 from settling in the easy settlement area; Step 3: Setting a blocking and buffering mechanism, setting a settlement blocking mechanism 25 and a locking and reinforcing mechanism in the reinforcing column 4, and connecting the supporting block 274 and the locking card plate 276 with the reinforcing steel rope 13 by turning the rotating plate 271, so that the reinforcing steel rope 13 is connected with the buffering mechanism to buffer the vibration generated when the subway is running; Step 4: Set up a supporting mechanism, insert the supporting column 3 into the soil, and rotate the compensating rod 191 so that there is an angle between the compensating rod 191 and the supporting column 3, and then pour concrete into the soil through the supporting column 3 to fill the gaps. At the same time, increase the structural strength of the soil in areas prone to settlement to avoid settlement during subway operation.
[0028] Although the embodiments of the present invention have been shown and described, it should be emphasized that the above description is only an introduction and description of the use of the embodiments of the present invention, and does not limit the present invention in any form. For those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.
Claims
1. A subway tunnel soft soil foundation reinforcement structure, comprising a tunnel body (1), characterized in that: A support foundation (2) is provided in the middle of the tunnel body (1), a support column (3) is provided at the lower end of the support foundation (2), an adjusting screw (17) is provided in the middle of the support column (3), a ground boring head (16) is fixedly connected to the lower end of the support column (3), a connection box (5) is provided at the lower end of the tunnel body (1), both ends of the support column (3) pass through the connection box (5), installation grooves (18) are provided on both sides of the support column (3), and a compensation reinforcement mechanism (19) is provided at the installation groove (18). The compensation reinforcement mechanism (19) is composed of a compensation rod (191), a blocking head (192), an extrusion plate (193) and a blocking column (194); a transmission gear (6) and a first guide wheel (7) are rotatably connected in the connection box (5); reinforcement columns (4) are provided on both sides of the tunnel body (1); the reinforcement columns (4) are hollow inside; a second guide wheel (10) is rotatably connected in the middle of the reinforcement columns (4); a third guide wheel (11) is provided on the outer side wall of the reinforcement column (4); and a fourth guide wheel is provided in the middle of the upper end of the reinforcement column (4). (12), a reinforcing steel rope (13) is provided between the first guide wheel (7), the second guide wheel (10), the third guide wheel (11) and the fourth guide wheel (12), two fixing plates (15) are fixedly connected in the middle of the reinforcing column (4), a fixing column (14) is provided in the middle of the two fixing plates (15), a connecting block (20) is fixedly connected in the middle of the fixing column (14), both sides of the connecting block (20) are provided with a clamping groove (21), a tail end of the fixing column (14) is provided with a settlement blocking mechanism (25), the settlement The blocking mechanism (25) is composed of a blocking wheel (251), a clamping protrusion (252), a connecting screw (253), a sliding block (254), a plug-in slot (255), and a spring sheet. The front end of the fixed column (14) is fixedly connected to a connecting column (26). The front end of the connecting column (26) is provided with a locking and fixing mechanism (27). The locking and fixing mechanism (27) is composed of a rotating plate (271), a limiting block (272), a sliding slot (273), a supporting block (274), an auxiliary block (275), and a locking clamping plate (276).
2. A subway tunnel soft soil foundation reinforcement structure according to claim 1, characterized in that: The upper diameter of the drilling head (16) is larger than the diameter of the support column (3); the interior of the support column (3) is hollow; the mounting groove (18) and the hollow portion of the support column (3) are connected; the lower end of the adjusting screw (17) is rotatably connected to the support column (3); and the upper end of the adjusting screw (17) penetrates the supporting foundation (2).
3. The soft soil foundation reinforcement structure for subway tunnel according to claim 1, characterized in that: The extrusion plate (193) and the adjusting screw (17) are threadedly connected, and the extrusion plate (193) moves vertically inside the support column (3). A gap exists between the extrusion plate (193) and the support column (3). The blocking head (192) is fixedly connected to the upper end of the compensation rod (191). An angle exists between the blocking head (192) and the compensation rod (191). The blocking head (192) abuts against the bottom of the extrusion plate (193).
4. The soft soil foundation reinforcement structure for subway tunnel according to claim 1, characterized in that: A rotating shaft is provided at the connection between the blocking head (192) and the compensation rod (191); the compensation rod (191) is rotatably connected to the rotating shaft; the blocking column (194) is fixedly connected to the middle of the mounting groove (18); the side end of the compensation rod (191) abuts against the blocking column (194); an angle exists between the compensation rod (191) and the support column (3); and when the compensation rod (191) is in an initial state, the lower end of the compensation rod (191) is retracted above the drilling head (16).
5. The subway tunnel soft soil foundation reinforcement structure according to claim 1, characterized in that: A plurality of engaging teeth (9) are provided on the outer side walls of both sides of the support column (3); a clamping rack (8) is fixedly connected in the middle of the reinforcing steel rope (13); the clamping rack (8) is located at the first guide wheel (7); the transmission gear (6) is respectively meshed with the clamping rack (8) and the engaging teeth (9); and the second guide wheel (10) and the fourth guide wheel (12) are located on the same vertical line.
6. The subway tunnel soft soil foundation reinforcement structure according to claim 1, characterized in that: The support block (274) is fixedly connected to the front end of the connecting column (26); the side end of the support block (274) is an arc-shaped structure; the auxiliary block (275) is fixedly connected to the top end of the support block (274); the top end of the rotating plate (271) and the auxiliary block (275) are rotatably connected; the locking card plate (276) is fixedly connected to the lower end of the rotating plate (271); the locking card plate (276) is an arc-shaped structure; and the reinforcing steel rope (13) is clamped between the locking card plate (276) and the support block (274).
7. The subway tunnel soft soil foundation reinforcement structure according to claim 1, characterized in that: A movable plate (22) is inserted into the clamping groove (21), and the movable plate (22) is a U-shaped structure. A return spring (24) is fixedly connected between the middle of the lower end of the movable plate (22) and the connecting block (20). The upper end of the movable plate (22) is rotatably connected to an auxiliary wheel (23). The rotating plate (271) is inclined, and the middle of the rotating plate (271) is located at the upper end of the auxiliary wheel (23). The limit block (272) is fixedly connected to the upper end of the connecting column (26). A sliding groove (273) is provided in the middle of the limit block (272), and both ends of the rotating plate (271) pass through the sliding groove (273).
8. The subway tunnel soft soil foundation reinforcement structure according to claim 1, characterized in that: The connecting screw (253) is threadedly connected to the rear end of the fixing column (14); the blocking wheel (251) and the connecting screw (253) are rotatably connected; the side end surface of the blocking wheel (251) is an arc-shaped groove structure; the clamping protrusion (252) is located on the arc-shaped surface of the blocking wheel (251); the clamping protrusion (252) is arranged around the blocking wheel (251); and the side end of the clamping protrusion (252) is an arc-shaped structure.
9. The subway tunnel soft soil foundation reinforcement structure according to claim 1, characterized in that: A plurality of reinforcing sheets (256) are fixedly connected to the side ends of the fixed plate (15); the reinforcing sheets (256) are arc-shaped structures; the reinforcing sheets (256) are elastic sheets; the elastic coefficients of the reinforcing sheets (256) gradually increase from left to right; a sliding block (254) is fixedly connected to the lower ends of the reinforcing sheets (256); a plug-in groove (255) is provided at the side ends of the sliding block (254); and the clamping protrusion (252) and the plug-in groove (255) are clamped to each other.
10. A method for using the subway tunnel soft soil foundation reinforcement structure according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: Determine an area where soil is prone to subsidence, and set two reinforcement columns (4) and a connection box (5) at the area where soil is prone to subsidence, wherein the two reinforcement columns (4) are set on both sides of the tunnel body (1), and the connection box (5) is set at the lower end of the tunnel body (1); Step 2: Setting up a traction structure, drilling holes in the connection box (5), drilling the holes through the reinforcement column (4), and setting up a first guide wheel (7), a second guide wheel (10), a third guide wheel (11), and a fourth guide wheel (12) at the connection box (5) and the reinforcement column (4), connecting the reinforcement steel rope (13) to the guide wheel, and suspending the tunnel body (1) with the reinforcement steel rope (13) to prevent the tunnel body (1) from settling in the area prone to settlement; Step 3: Setting a blocking and buffering mechanism, setting a settlement blocking mechanism (25) and a locking and reinforcing mechanism in the reinforcing column (4), and connecting the support block (274) and the locking clamping plate (276) to the reinforcing steel rope (13) by turning the rotating plate (271), so that the reinforcing steel rope (13) is connected to the buffering mechanism, so as to buffer the vibration generated when the subway is running; Step 4: Setting up a support mechanism, inserting the support column (3) into the soil, and rotating the compensation rod (191) so that an angle exists between the compensation rod (191) and the support column (3), and then pouring concrete into the soil through the support column (3) to fill the generated gaps, thereby increasing the structural strength of the soil in the area prone to settlement, thereby preventing settlement from occurring during subway operation.