Soft soil tunnel anchor rod supporting device

Abstract

The invention discloses an anchor rod supporting device for a soft soil tunnel. The anchor rod supporting device comprises a vehicle body, an arc-shaped guide supporting rod, an arc-shaped supporting plate, an arc-shaped anchoring working platform, an anchor rod feeding mechanism, an anchor rod, an extension rod, a transverse working platform and a grouting connector. The two trolley bodies are symmetrically arranged at the arch bottom of the tunnel in the transverse direction of the tunnel, and arc-shaped guide supporting rods and arc-shaped supporting plates with arc surfaces matched with the inner wall of the tunnel are fixed to the trolley bodies. The arc-shaped anchoring working platform is in sliding fit with the guide rod through an arc-shaped sliding hole, the gear is meshed with the toothed rail to achieve circumferential movement, the anchor rod feeding mechanism drives the anchor rod to be fed precisely in the radial direction, the anchor rod is in threaded connection with the extension rod, and internal channels of the anchor rod and the extension rod are communicated with a grouting connector to achieve grouting. Annular and radial accurate positioning of the anchor rod can be achieved, the soft soil tunnel reinforcing requirement is met, anchoring is stable, operation is convenient and fast, and the soft soil tunnel supporting efficiency and reliability are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of soft soil tunnel construction technology, and specifically to a soft soil tunnel anchor support device. Background Technology

[0002] Currently, anchor bolt support in soft soil tunnels is mostly carried out manually using handheld equipment or simple support devices. This results in low work efficiency, high labor intensity, and difficulty in achieving rapid anchoring at different locations along the tunnel's circumference. Furthermore, the construction support precision is poor, and manual operation easily leads to anchor bolt tilting and insufficient depth, directly affecting the tunnel support effect. The working face in soft soil tunnels is complex, and there are significant safety hazards. Therefore, there is an urgent need for a soft soil tunnel anchor bolt support device that is structurally sound, easy to operate, stable, and highly adaptable to address the aforementioned problems in existing technologies. Existing devices do not achieve automation of tunnel reinforcement anchor bolts or integrated positioning and pressing, failing to meet the construction requirements for rapid, safe, and efficient support in soft soil tunnels. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing soft soil tunnel anchor support devices, such as low operating efficiency, poor accuracy, and poor adaptability, and to provide a soft soil tunnel anchor support device that enables flexible longitudinal and circumferential movement of the tunnel, accurately controls the anchor support position and depth, improves support efficiency and quality, and ensures construction safety.

[0004] To achieve the above objectives, the present invention provides a soft soil tunnel anchor support device, comprising a vehicle body, an arc-shaped guide support rod, an arc-shaped support plate, an arc-shaped anchoring working platform, an anchor feeding mechanism, an anchor rod, an extension rod, a transverse working platform, and a grouting interface.

[0005] Two vehicle bodies are symmetrically arranged along the tunnel's transverse direction and near the tunnel's arch bottom; counterweights are fixedly connected to the vehicle bodies by bolts; a transverse working platform spans between the two vehicle bodies along the tunnel's transverse direction and is fixedly connected to their sides.

[0006] Two parallel and spaced arc-shaped guide support rods and two parallel and spaced arc-shaped support plates are fixedly installed on the top surface of the vehicle body along the transverse direction of the tunnel. The arc surfaces of the arc-shaped guide support rods and the arc-shaped support plates are adapted to the curvature of the tunnel inner wall, and the arc-shaped guide support rods are located on the radial outer side of the arc-shaped support plates.

[0007] The upper arc surface of the arc support plate is integrally formed with a working wheel slide and a toothed rail. The working wheel slide and the toothed rail extend along the same arc trajectory and the spacing is constant.

[0008] The arc-shaped anchoring working platform is provided with two arc-shaped sliding holes along the circumference of the tunnel. Two arc-shaped guide support rods slide through the two arc-shaped sliding holes to form a sliding guide fit. The arc of the arc-shaped sliding hole and the arc of the arc-shaped guide support rod are concentric and have the same curvature arc structure, ensuring that the arc-shaped anchoring working platform can slide circumferentially along the arc-shaped guide support rod. The arc-shaped anchoring working platform is supported by the working wheel on the working wheel slide of the two arc-shaped support plates through the rolling support of the working wheels, and the working wheels and the arc-shaped support plates are in rolling fit.

[0009] An anchor bolt feeding mechanism is fixedly installed inside the arc-shaped anchoring working platform by bolts; the drive end of the anchor bolt feeding mechanism is arranged radially along the tunnel, and the anchor bolt feeding mechanism is detachably connected to the anchor bolt; the anchor bolt feeding mechanism drives the anchor bolt to feed precisely radially along the tunnel; the anchor bolt is threadedly connected to the extension rod, and the end of the extension rod is provided with a grouting interface.

[0010] The vehicle body includes a chassis, a drive assembly, and a driven support assembly; the driven support assembly is installed at the front end of the chassis along the tunnel travel direction, and the drive assembly is installed at the rear end. Each vehicle body is equipped with one set of driven support assembly and one set of drive assembly.

[0011] The driven support assembly includes a first support member, a first axle, and two first wheels; the first support member is vertically fixed to the bottom front end of the chassis, the first support member has a bearing embedded in it, the first axle passes through the inner ring of the bearing and rotates with the first support member; a first wheel is fixedly installed at each end of the first axle.

[0012] The drive assembly includes a second support member, a second axle, a driven wheel, a drive wheel, a first travel motor, a first travel motor fixing block, and two second travel wheels; the second support member is vertically fixed to the bottom of the rear end of the vehicle chassis, the second support member is embedded with a bearing, and the second axle passes through the inner ring of the bearing and rotates with the second support member.

[0013] On the second axle of each vehicle body, a driven wheel is fixed on the side away from the tunnel axis along the transverse direction of the tunnel. A second traveling wheel is fixedly installed at each end of the second axle. The traveling direction of the first traveling wheel and the second traveling wheel is along the longitudinal direction of the tunnel.

[0014] A first travel motor fixing block is fixedly installed on the bottom surface of the vehicle chassis, in front of the second support member along the longitudinal direction of the tunnel. The first travel motor is fixedly installed inside the first travel motor fixing block. The output end of the first travel motor is fixedly connected to the drive wheel. The drive wheel is connected to the driven wheel through a synchronous belt, driving the vehicle body to move longitudinally along the tunnel.

[0015] The arc-shaped anchoring working platform includes a gear shaft, a working wheel shaft, gears, working wheels, and a second drive motor. Two second drive motors are symmetrically arranged along the transverse direction of the tunnel inside the arc-shaped anchoring working platform. The output shaft of the second drive motor is fixedly connected to the gear shaft through a coupling. Gears are fixedly installed on the gear shaft, and the gears mesh with the corresponding toothed rails for transmission. The two second drive motors are synchronously controlled so that the two gears mesh with the two toothed rails synchronously for transmission.

[0016] Two working wheel shafts are arranged parallel to and symmetrically on both sides of the gear shaft. The working wheel shafts are rotatably supported on the arc-shaped anchored working platform by rolling bearings. Working wheels are fixedly installed on the working wheel shafts, and the working wheels are in rolling cooperation with the working wheel slide.

[0017] A radial clearance is left between the arc-shaped sliding hole and the arc-shaped guide support rod to ensure smooth sliding and prevent radial swaying of the arc-shaped anchoring work platform.

[0018] The second drive motor drives the gear to mesh along the toothed track, causing the working wheel and the working wheel slide to roll synchronously, so that the arc-shaped anchoring working platform can rotate around the center of the tunnel and along the tunnel circumference from the top of the arch to the two sides of the arch waist. With the vertical central axis of the tunnel as the reference, the circumferential rotation angle on one side is 0° to 80°.

[0019] The end connecting the anchor rod and the extension rod is the rear end, which is provided with external threads. The anchor rod has a grouting channel that runs through the front and rear ends, and the anchor rod body has multiple rows of grouting holes along the axial direction.

[0020] The extension rod has an internal thread that matches the external thread at one end near the anchor rod, and the two are connected by threads. The length of the extension rod is adapted to the anchoring depth of the anchor rod, ensuring that the front end of the anchor rod can be pressed into the soft soil layer to achieve effective anchoring.

[0021] The extension rod has a central through hole that runs through both ends; the drive shafts of the anchor rod, the extension rod, and the anchor rod feeding mechanism are coaxially arranged, and the grouting interface is located at the end of the extension rod away from the anchor rod. The grouting interface, the central through hole of the extension rod, and the grouting channel of the anchor rod are interconnected.

[0022] The threaded connection between the anchor rod and the extension rod is equipped with a high-pressure resistant nitrile rubber sealing gasket; the inner diameter of the sealing gasket is larger than the diameter of the anchor rod body, which facilitates the fitting.

[0023] The extension rod and the anchor rod are tightened together by screwing, and the sealing gasket is pressed between the rear end face of the anchor rod and the front end face of the extension rod to achieve a seal at the connection end. Beneficial effects

[0024] The double-layer arc-shaped support structure of arc-shaped guide support rod and arc-shaped support plate enables the arc-shaped anchoring working platform to slide stably along the tunnel circumference. With the meshing transmission of gears and toothed rails, continuous and precise positioning from the arch crown to the arch waist area is achieved, effectively solving the problems of inaccurate positioning and large angle deviation in traditional anchor construction. The concentric cooperation of the arc-shaped sliding hole and guide rod, as well as the rolling support of the working wheel, greatly reduces radial sway, ensuring that the anchor is always accurately fed radially along the tunnel in soft soil strata, significantly improving the accuracy and reliability of anchoring construction.

[0025] The device employs an anchor feed mechanism to drive the radial feed of the anchor bolts. Combined with a circumferentially movable arc-shaped anchoring work platform and a longitudinally movable vehicle structure, it achieves automated anchoring construction in the three-dimensional space of the tunnel in the circumferential, radial, and longitudinal directions. The device can continuously complete the drilling, extension, and grouting preparation of multiple anchor bolts, simplifying the construction process and significantly improving efficiency. It can be efficiently matched with the tunnel excavation rhythm and is particularly suitable for large-section, high-density anchoring operations in soft soil tunnels.

[0026] The anchor rod and extension rod are connected by threads and equipped with a high-pressure sealing structure. Combined with a through-type grouting channel and multiple rows of grouting holes, uniform grouting is achieved throughout the entire length of the anchoring section, effectively preventing grout leakage from the connection end face and ensuring the sealing of the grouting process. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is the front view of the present invention.

[0029] Figure 2 This is the left view of the present invention.

[0030] Figure 3 This is the right view of the present invention.

[0031] Figure 4 This is a top view of the present invention.

[0032] Figure 5 for Figure 1 Enlarged view of part A in the middle.

[0033] Figure 6 for Figure 4 Cross-sectional view of BB.

[0034] Figure 7 for Figure 5 C-section view.

[0035] Figure 8 for Figure 5 Cross-sectional view of DD.

[0036] The markings in the diagram are as follows: 1. Vehicle body; 11. Vehicle chassis; 12a. First support component; 12b. Second support component; 13a. First axle; 13b. Second axle; 14. Driven wheel; 15a. First traveling wheel; 15b. Second traveling wheel; 16. Drive wheel; 17. First traveling motor; 18. First traveling motor fixing block; 19. Counterweight block; 2. Arc-shaped guide support rod; 3. Arc-shaped support plate; 31. Working wheel slide rail; 32. Gear rail; 4. Arc-shaped anchoring working platform; 41. Gear shaft; 42. Working wheel shaft; 43. Gear; 44. Working wheel; 45. Second drive motor; 5. Arc-shaped sliding hole; 6. Anchor bolt feeding mechanism; 7. Anchor bolt; 8. Extension rod; 9. Lateral working platform; 10. Grouting interface. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] like Figure 1-8 As shown, this embodiment provides a soft soil tunnel anchor support device, including a vehicle body 1, an arc-shaped guide support rod 2, an arc-shaped support plate 3, an arc-shaped anchoring working platform 4, an anchor feeding mechanism 6, an anchor rod 7, an extension rod 8, a transverse working platform 9, and a grouting interface 10.

[0039] Two vehicle bodies 1 are symmetrically arranged along the transverse direction of the tunnel and near the bottom of the tunnel arch; counterweights 19 are fixedly connected to the vehicle bodies 1 by bolts; a transverse working platform 9 spans between the two vehicle bodies 1 along the transverse direction of the tunnel and is fixedly connected to its side.

[0040] Two parallel and spaced arc-shaped guide support rods 2 and two parallel and spaced arc-shaped support plates 3 are fixedly installed on the top surface of the vehicle body 1 along the transverse direction of the tunnel; the arc surfaces of the arc-shaped guide support rods 2 and the arc-shaped support plates 3 are adapted to the curvature of the tunnel inner wall, and the arc-shaped guide support rods 2 are located on the radial outer side of the arc-shaped support plates 3.

[0041] The upper arc surface of the arc support plate 3 is integrally formed with a working wheel slide 31 and a toothed rail 32. The working wheel slide 31 and the toothed rail 32 extend along the same arc trajectory and the spacing is constant.

[0042] The arc-shaped anchoring working platform 4 is provided with two arc-shaped sliding holes 5 along the circumference of the tunnel. Two arc-shaped guide support rods 2 are correspondingly slidably inserted into the two arc-shaped sliding holes 5 to form a sliding guide fit. The arc of the arc-shaped sliding hole 5 and the arc of the arc-shaped guide support rod 2 are concentric arc structures with the same curvature, ensuring that the arc-shaped anchoring working platform 4 can slide circumferentially along the arc-shaped guide support rod 2. The arc-shaped anchoring working platform 4 is supported by the working wheel slide 31 of the two arc-shaped support plates 3 by the working wheel 44, and the working wheel 44 and the arc-shaped support plate 3 are in rolling fit.

[0043] An anchor bolt feeding mechanism 6 is fixedly installed inside the arc-shaped anchoring working platform 4 by bolts; the driving end of the anchor bolt feeding mechanism 6 is arranged radially along the tunnel, and the anchor bolt feeding mechanism 6 is detachably connected to the anchor bolt 7; the anchor bolt feeding mechanism 6 drives the anchor bolt 7 to feed precisely radially along the tunnel; the anchor bolt 7 is threadedly connected to the extension rod 8, and the tail of the extension rod 8 is provided with a grouting interface 10.

[0044] The vehicle body 1 includes a vehicle chassis 11, a drive assembly and a driven support assembly; the driven support assembly is provided at the front end of the vehicle chassis 11 along the tunnel travel direction, and the drive assembly is provided at the rear end. Each vehicle body 1 is equipped with a set of driven support assemblies and a set of drive assemblies.

[0045] The driven support assembly includes a first support member 12a, a first axle 13a, and two first wheels 15a. The first support member 12a is vertically fixed to the bottom front end of the chassis 11. The first support member 12a is embedded with a bearing. The first axle 13a passes through the inner ring of the bearing and rotates with the first support member 12a. A first wheel 15a is fixedly installed at each end of the first axle 13a.

[0046] The drive assembly includes a second support member 12b, a second axle 13b, a driven wheel 14, a drive wheel 16, a first travel motor 17, a first travel motor fixing block 18, and two second travel wheels 15b; the second support member 12b is vertically fixed to the bottom of the rear end of the chassis 11, and a bearing is embedded in the second support member 12b. The second axle 13b passes through the inner ring of the bearing and rotates in cooperation with the second support member 12b.

[0047] On the second axle 13b of each vehicle body 1, a driven wheel 14 is fixed on the side away from the tunnel axis along the transverse direction of the tunnel. A second traveling wheel 15b is fixedly installed at each end of the second axle 13b. The traveling direction of the first traveling wheel 15a and the second traveling wheel 15b is along the longitudinal direction of the tunnel.

[0048] A first travel motor fixing block 18 is fixedly installed on the bottom surface of the vehicle chassis 11, located in front of the second support member 12b along the longitudinal direction of the tunnel. A first travel motor 17 is fixedly installed inside the first travel motor fixing block 18. The output end of the first travel motor 17 is fixedly connected to the drive wheel 16. The drive wheel 16 is connected to the driven wheel 14 through a synchronous belt, driving the vehicle body 1 to move along the longitudinal direction of the tunnel.

[0049] The arc-shaped anchoring working platform 4 includes a gear shaft 41, a working wheel shaft 42, a gear 43, a working wheel 44, and a second drive motor 45. Two second drive motors 45 are symmetrically arranged along the transverse direction of the tunnel inside the arc-shaped anchoring working platform 4. The output shaft of the second drive motor 45 is fixedly connected to the gear shaft 41 through a coupling. The gear 43 is fixedly installed on the gear shaft 41, and the gear 43 meshes with the corresponding toothed rail 32 for transmission. The two second drive motors 45 are synchronously controlled so that the two gears 43 mesh with the two toothed rails 32 synchronously for transmission.

[0050] Two working wheel shafts 42 are arranged parallel to and symmetrically on both sides of the gear shaft 41. The working wheel shafts 42 are rotatably supported on the arc-shaped anchored working platform 4 by rolling bearings. Working wheels 44 are fixedly installed on the working wheel shafts 42, and the working wheels 44 are in rolling cooperation with the working wheel slide 31.

[0051] A radial clearance is left between the arc-shaped sliding hole 5 and the arc-shaped guide support rod 2 to ensure smooth sliding and prevent radial shaking of the arc-shaped anchoring work platform 4.

[0052] The second drive motor 45 drives the gear 43 to mesh along the toothed rail 32, which drives the working wheel 44 to roll synchronously with the working wheel slide 31, so that the arc-shaped anchoring working platform 4 can rotate around the center of the tunnel from the top of the arch to the two sides of the arch along the tunnel circumference. With the vertical central axis of the tunnel as the reference, the circumferential rotation angle on one side is 0° to 80°.

[0053] The end of the anchor rod 7 that connects to the extension rod 8 is the rear end, and the rear end is provided with external threads. The anchor rod 7 has a grouting channel that runs through the front and rear ends, and the anchor rod 7 has multiple rows of grouting holes along the axial direction.

[0054] The extension rod 8 has an internal thread that matches the external thread at one end near the anchor rod 7, and the two are connected by threads. The length of the extension rod 8 is matched with the anchoring depth of the anchor rod, ensuring that the front end of the anchor rod 7 can be pressed into the soft soil layer to achieve effective anchoring.

[0055] The extension rod 8 has a central through hole that runs through both ends; the drive axes of the anchor rod 7, the extension rod 8 and the anchor rod feeding mechanism 6 are coaxially arranged; the grouting interface 10 is located at the end of the extension rod 8 away from the anchor rod 7; the grouting interface 10, the central through hole of the extension rod 8 and the grouting channel of the anchor rod 7 are interconnected.

[0056] The threaded connection between the anchor rod 7 and the extension rod 8 is provided with a high-pressure resistant nitrile rubber sealing gasket; the inner diameter of the sealing gasket is larger than the diameter of the anchor rod 7, which facilitates the fitting.

[0057] The extension rod 8 and the anchor rod 7 are tightened together by threads, and the sealing gasket is pressed between the rear end face of the anchor rod 7 and the front end face of the extension rod 8 to achieve a seal at the connection end face.

[0058] Working principle First, the first traveling motor 17 rotates, driving the drive wheel 16 to rotate. The drive wheel 16 is connected to the driven wheel 14 via a synchronous belt. The power is transmitted to the second axle 13b in sequence, driving the second traveling wheel 15b to rotate. At the same time, the first traveling wheel 15a rotates, driving the vehicle body 1 to move to the tunnel support area. The counterweight 19 ensures the stability of the vehicle body 1.

[0059] The second drive motor 45 is started, and the second drive motor 45 drives the gear 43 to rotate along the toothed rail 32. The arc-shaped guide support rod 2 and the arc-shaped sliding hole 5, the working wheel 44 and the working wheel slide 31 work together to drive the arc-shaped anchoring working platform 4 to move along the tunnel circumference to the designated anchoring position, ensuring smooth and accurate movement.

[0060] First, install the sealing gasket on the anchor rod 7 and the extension rod 8, then tighten the threaded connection to compress the sealing gasket and achieve end face sealing.

[0061] Start the anchor feed mechanism 6 to drive the anchor 7 to feed radially along the tunnel and drill into the soft soil layer to the designed depth.

[0062] Connect the grouting interface 10 to the grouting equipment, inject grouting material through the grouting interface 10, and press the grouting material into the soft soil layer through the central through hole of the extension rod 8 and the grouting channel of the anchor rod 7, thus completing the anchoring and grouting operation.

[0063] After the operation is completed, the grouting interface 10 is separated from the grouting equipment, the anchor feed mechanism 6 drives the anchor 7 to reset, and the second drive motor 45 drives the arc-shaped anchoring working platform 4 to move to the next working position. The above steps can be repeated.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A soft soil tunnel anchor support device, characterized in that, It includes a vehicle body (1), an arc-shaped guide support rod (2), an arc-shaped support plate (3), an arc-shaped anchoring working platform (4), an anchor feed mechanism (6), an anchor rod (7), an extension rod (8), a transverse working platform (9), and a grouting interface (10). Two vehicle bodies (1) are symmetrically arranged along the tunnel and near the bottom of the tunnel; counterweights (19) are fixedly connected to the vehicle bodies (1) by bolts; the transverse working platform (9) spans between the two vehicle bodies (1) along the tunnel and is fixedly connected to its side. The top surface of the vehicle body (1) is fixedly provided with two parallel and spaced arc-shaped guide support rods (2) and two parallel and spaced arc-shaped support plates (3) along the transverse direction of the tunnel; the arc surfaces of the arc-shaped guide support rods (2) and the arc-shaped support plates (3) are adapted to the curvature of the tunnel inner wall, and the arc-shaped guide support rods (2) are located on the radial outer side of the arc-shaped support plates (3); The upper arc surface of the arc support plate (3) is integrally formed with a working wheel slide (31) and a toothed rail (32). The working wheel slide (31) and the toothed rail (32) extend along the same arc trajectory and the spacing is constant. The arc-shaped anchoring working platform (4) is provided with two arc-shaped sliding holes (5) along the tunnel circumference. Two arc-shaped guide support rods (2) are correspondingly slidably inserted into the two arc-shaped sliding holes (5) to form a sliding guide fit. The arc of the arc-shaped sliding hole (5) and the arc of the arc-shaped guide support rod (2) are arc-shaped structures with the same center and curvature, ensuring that the arc-shaped anchoring working platform (4) can slide circumferentially along the arc-shaped guide support rod (2). The arc-shaped anchoring working platform (4) is supported by the working wheel (44) rolling on the working wheel slide (31) of the two arc-shaped support plates (3), and the working wheel (44) and the arc-shaped support plate (3) are in rolling fit. An anchor feeding mechanism (6) is fixedly installed inside the arc-shaped anchoring work platform (4) by bolts; the driving end of the anchor feeding mechanism (6) is arranged along the radial direction of the tunnel, and the anchor feeding mechanism (6) and the anchor (7) are detachably connected; the anchor feeding mechanism (6) drives the anchor (7) to feed precisely along the radial direction of the tunnel; the anchor (7) is threadedly connected to the extension rod (8), and the tail of the extension rod (8) is provided with a grouting interface (10).

2. The soft soil tunnel anchor support device according to claim 1, characterized in that, The vehicle body (1) includes a vehicle chassis (11), a drive assembly and a driven support assembly; the vehicle chassis (11) is provided with a driven support assembly at the front end along the tunnel travel direction and a drive assembly at the rear end. Each vehicle body (1) is equipped with a set of driven support assemblies and a set of drive assemblies. The driven support assembly includes a first support member (12a), a first axle (13a), and two first wheels (15a); the first support member (12a) is vertically fixed to the bottom front end of the chassis (11), the first support member (12a) is fitted with a bearing, the first axle (13a) passes through the inner ring of the bearing and rotates with the first support member (12a); a first wheel (15a) is fixedly installed at each end of the first axle (13a). The drive assembly includes a second support member (12b), a second axle (13b), a driven wheel (14), a drive wheel (16), a first travel motor (17), a first travel motor fixing block (18), and two second travel wheels (15b); the second support member (12b) is vertically fixed to the bottom of the rear end of the chassis (11), the second support member (12b) is embedded with a bearing, and the second axle (13b) passes through the inner ring of the bearing and rotates in cooperation with the second support member (12b); On the second axle (13b) of each vehicle body (1), a driven wheel (14) is fixed on the side away from the tunnel axis along the transverse direction of the tunnel. A second traveling wheel (15b) is fixedly installed at each end of the second axle (13b). The traveling direction of the first traveling wheel (15a) and the second traveling wheel (15b) is along the longitudinal direction of the tunnel. The first travel motor fixing block (18) is fixedly installed on the bottom surface of the vehicle chassis (11) and in front of the second support member (12b) along the longitudinal direction of the tunnel. The first travel motor (17) is fixedly installed inside the first travel motor fixing block (18). The output end of the first travel motor (17) is fixedly connected to the drive wheel (16). The drive wheel (16) is connected to the driven wheel (14) through a synchronous belt to drive the vehicle body (1) to move along the longitudinal direction of the tunnel.

3. The soft soil tunnel anchor support device according to claim 1, characterized in that, The arc-shaped anchoring working platform (4) includes a gear shaft (41), a working wheel shaft (42), a gear (43), a working wheel (44), and a second drive motor (45). Two second drive motors (45) are symmetrically arranged along the transverse direction of the tunnel inside the arc-shaped anchoring working platform (4). The output shaft of the second drive motor (45) is fixedly connected to the gear shaft (41) through a coupling. The gear (43) is fixedly installed on the gear shaft (41). The gear (43) meshes with the corresponding toothed rail (32) for transmission. The two second drive motors (45) are synchronously controlled so that the two gears (43) mesh with the two toothed rails (32) synchronously for transmission. Two working wheel shafts (42) are arranged parallel to and symmetrically on both sides of the gear shaft (41). The working wheel shafts (42) are rotatably supported on the arc-shaped anchoring working platform (4) by rolling bearings. Working wheels (44) are fixedly installed on the working wheel shafts (42). The working wheels (44) are in rolling cooperation with the working wheel slide (31). A radial fit clearance is left between the arc-shaped sliding hole (5) and the arc-shaped guide support rod (2) to ensure smooth sliding and avoid radial shaking of the arc-shaped anchoring work platform (4).

4. The soft soil tunnel anchor support device according to claim 3, characterized in that, The second drive motor (45) drives the gear (43) to mesh and transmit along the toothed track (32), driving the working wheel (44) to roll synchronously with the working wheel slide (31), so that the arc-shaped anchoring working platform (4) can rotate around the center of the tunnel from the top of the arch to the two sides of the arch waist along the tunnel circumference, with the vertical central axis of the tunnel as the reference, and the circumferential rotation angle on one side is 0° to 80°.

5. The soft soil tunnel anchor support device according to claim 1, characterized in that, The end of the anchor rod (7) connected to the extension rod (8) is the rear end, the rear end is provided with external thread, the anchor rod (7) is provided with a grouting channel that runs through the front and rear ends, and the anchor rod (7) is provided with multiple rows of grouting holes along the axial direction. The extension rod (8) has an internal thread that matches the external thread at one end near the anchor rod (7), and the two are connected by threads; the length of the extension rod (8) matches the anchoring depth of the anchor rod, ensuring that the front end of the anchor rod (7) can be pressed into the soft soil layer to achieve effective anchoring; The extension rod (8) has a central through hole that runs through both ends; the drive shafts of the anchor rod (7), the extension rod (8) and the anchor rod feeding mechanism (6) are coaxially arranged; the grouting interface (10) is located at the end of the extension rod (8) away from the anchor rod (7); the grouting interface (10), the central through hole of the extension rod (8) and the grouting channel of the anchor rod (7) are interconnected.

6. The soft soil tunnel anchor support device according to claim 5, characterized in that, The threaded connection between the anchor rod (7) and the extension rod (8) is provided with a high-pressure nitrile rubber sealing gasket; the inner diameter of the sealing gasket is larger than the diameter of the anchor rod (7) for easy fitting. The extension rod (8) and the anchor rod (7) are tightened together by screws, and the sealing gasket is pressed between the rear end face of the anchor rod (7) and the front end face of the extension rod (8) to achieve sealing of the connection end face.

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