Method for installing geotextile, waterproof board and secondary lining steel bars in tunnel

Abstract

The invention relates to the field of tunnel construction, in particular to a method for installing geotechnical cloth, waterproof plates and secondary lining steel bars in a tunnel, which comprises the following steps: arranging a secondary lining steel bar framework on a movable trolley according to the design contour of the tunnel; geotextile is laid on the secondary lining steel reinforcement framework, and the geotextile is leveled through tensioning or flattening; a waterproof plate is laid on the geotechnical cloth; the second lining steel reinforcement framework is fixed to the trolley; the second lining steel bar framework with the assembled geotechnical cloth and the waterproof plate integrally deforms inwards in the direction of the center line of the tunnel to form a to-be-assembled body, and the overall contour size of the to-be-assembled body is smaller than the minimum size of the inner contour limiting area of the tunnel; the to-be-assembled body is conveyed in the longitudinal direction of the tunnel through a trolley to reach the designated installation position; and after a preset position is reached, the secondary lining steel bar framework elastically recovers to the design contour shape, and meanwhile the geotechnical cloth and the waterproof plate are driven to be attached to the inner wall of the tunnel primary support. According to the invention, the installation is more efficient and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel construction, in particular to a method for installing geotextile, waterproof board and secondary lining steel bars in a tunnel. Background Art

[0002] With the continuous advancement of infrastructure construction, tunnel engineering, as a key component of important fields such as transportation and water conservancy, is attracting increasing attention for its construction quality and safety. During tunnel construction, the installation of geotextiles, waterproofing sheets, and secondary lining steel bars is a crucial step in ensuring the stability and durability of tunnel structures.

[0003] Secondary lining (or "secondary lining") reinforcement, the primary support structure for tunnel walls, is crucial for tunnel safety. Current installation methods rely primarily on manual positioning and tying, requiring workers to climb onto specialized trolleys to position the rebar before tying it. This approach is inefficient and poses challenges in ensuring accuracy. Furthermore, installing rebar in the confined tunnel environment presents significant safety risks and is labor-intensive.

[0004] In view of the above-mentioned relevant background, the existing technology has significant deficiencies in geotextile laying, waterproof board installation and secondary lining steel bar arrangement, and a more efficient and convenient installation method is urgently needed to solve these problems. Summary of the Invention

[0005] In order to improve the efficiency and convenience of installing geotextile, waterproof board and secondary lining steel bar in a tunnel, the present invention provides a method for installing geotextile, waterproof board and secondary lining steel bar in a tunnel.

[0006] The present invention provides a method for installing geotextile, waterproof board and secondary lining steel bar in a tunnel, which adopts the following technical solution: A method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel comprises the following steps: Secondary lining reinforcement laying: Laying out the secondary lining reinforcement skeleton on a movable trolley according to the tunnel design contour; Geotextile laying: Lay the geotextile on the secondary lining steel frame and level it by tensioning or flattening; Waterproof board fixing: lay the waterproof board on the geotextile, penetrate the waterproof board and geotextile through the connector and anchor it to the secondary lining steel frame; Pre-fixation: fix the secondary lining steel frame to the trolley; Shaping: The secondary lining steel frame, which has been assembled with geotextile and waterproof sheet, is subjected to controllable elastic bending deformation inwards towards the tunnel centerline to form a body to be assembled, so that the overall outline size of the body to be assembled is smaller than the minimum size of the restricted area of ​​the tunnel outline; Structural transportation: Use a trolley to transport the structure to be assembled along the longitudinal direction of the tunnel, through the restricted area of ​​the internal space, to the designated installation location; Structural repositioning and fitting: After reaching the predetermined position, the bending deformation force of the assembly is released, so that the secondary lining steel skeleton elastically recovers to the designed contour shape, while driving the geotextile and waterproof sheet to fit the inner wall of the primary support of the tunnel.

[0007] Preferably, the connecting piece is a plastic anchor nail or a hot-melt welding strip with a self-sealing function; after the plastic anchor nail penetrates the waterproof board, its nail cap or built-in sealing ring automatically closes the penetration hole under the action of the anchoring force; the hot-melt welding strip melts during the welding process and fuses with the waterproof board to form a sealed weld.

[0008] Preferably, during the second lining steel bar laying step of laying the second lining steel bar skeleton, the shaping step of performing overall bending deformation, the structure conveying step of conveying the second lining steel bar skeleton, and the structure resetting and bonding step of resetting the second lining steel bar skeleton, a laser positioning system installed in the tunnel and / or on the trolley is used to monitor the three-dimensional spatial coordinates and morphological changes of key points of the second lining steel bar skeleton in real time; Based on the feedback data from the laser positioning system, the curvature of the bending deformation, the deviation of the conveying path and the accuracy of the reset process are dynamically controlled.

[0009] Preferably, the trolley includes a frame, a traveling mechanism for driving the frame, a placing mechanism and a winding mechanism, the traveling mechanism is arranged below the frame, the placing mechanism includes a first placing rack and a fixing hook, the two first placing racks are rotatably connected to each other above the frame, and the fixing hook is rotatably connected to the bottom end of the first placing rack; The winding mechanism is provided with multiple groups along the traveling direction of the trolley, and the winding mechanism includes a first telescopic cylinder and a second telescopic cylinder. The first telescopic cylinder is relatively arranged on both sides of the frame, the cylinder body of the first telescopic cylinder is fixedly connected to the frame, and the piston rod of the first telescopic cylinder is connected to the rotation of the first placement rack; the cylinder body of the second telescopic cylinder is fixedly connected to the top end of the frame, and the piston rod of the second telescopic cylinder is fixedly connected to the rotation connection of the two first placement racks.

[0010] Preferably, the placement mechanism also includes a second placement rack and a third placement rack, the second placement rack is connected in a plurality of groups for circumferential rotation along the traveling direction of the trolley, and one end of the second placement rack is rotatably connected to one end of the first placement rack through a rotating shaft; the third placement rack is connected in a plurality of groups for circumferential rotation along the traveling direction of the trolley, and one end of the third placement rack is rotatably connected to one end of the first placement rack through a rotating shaft; the second placement rack and the third placement rack are rotatably connected through a rotating shaft.

[0011] Preferably, the winding mechanism also includes a third telescopic cylinder and a fourth telescopic cylinder, the cylinder body of the third telescopic cylinder is rotatably connected to the frame, and the piston rod of the third telescopic cylinder is rotatably connected to the rotating shaft between the first placement rack and the second placement rack; the cylinder body of the fourth telescopic cylinder is rotatably connected to the frame, and the piston rod of the fourth telescopic cylinder is rotatably connected to the rotating shaft between the first placement rack and the third placement rack.

[0012] Preferably, the placement mechanism further includes a card plate, which is fixedly connected to the first placement rack, and a plurality of the card plates are provided along the circumference of the traveling direction of the trolley.

[0013] Preferably, the placement mechanism further includes a plurality of adjustment plates, the first placement rack is provided with a plurality of adjustment slots, the adjustment rods slide in the adjustment slots, and the clamping plates are fixedly connected to the adjustment plates.

[0014] Preferably, it also includes a lifting mechanism, which includes multiple lifting cylinders, lifting platforms, guide rods and guide platforms. One end of the lifting platform is fixedly connected to the walking mechanism, and the other end of the lifting platform is fixedly connected to the cylinder body of the lifting cylinder. The piston rod of the lifting cylinder is fixedly connected to the frame, and the lifting platform is fixedly connected to the frame. One end of the guide rod is fixedly connected to the lifting platform, and the other end of the guide rod is slidably connected to the guide platform.

[0015] Preferably, a plurality of distance sensors are arranged on the first placement rack along the traveling direction of the trolley to form a first sensor array; a plurality of distance sensors are arranged on the first placement rack along the circumference of the traveling direction of the trolley to form a second sensor array; the first sensor array, the second sensor array, the first telescopic cylinder, the second telescopic cylinder, the third telescopic cylinder and the lifting cylinder are electrically connected to the control terminal.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects: 1. The integrated process, from pre-fixing to shaping and bending, delivery, and repositioning and bonding, solves the challenge of transporting large waterproof layers within narrow tunnel spaces. While traditional methods require segmented assembly, this solution enables integrated assembly and deformation-free passage, reducing the risk of high-altitude work. It also makes the installation of geotextiles, waterproofing sheets, and secondary lining rebar in tunnels more efficient and convenient.

[0017] 2. The second placement racks can bend to a certain extent with each other, and the third placement racks can be bent to a certain extent with each other, which reduces the local bending degree of the top annular main reinforcement, makes the bending more uniform, and reduces the possibility of plastic deformation of the annular main reinforcement; the rotational damping between the rotational connections of multiple second placement racks and multiple third placement racks can be gradually increased inward, and the two ends rotate first, further reducing the possibility of plastic deformation of the annular main reinforcement.

[0018] 3. The third telescopic cylinder adjusts the overall curvature of the first and second placement racks, and the fourth telescopic cylinder adjusts the overall curvature of the first and third placement racks, so that the first placement rack can be more easily retracted or restored, and tunnels of various sizes and shapes can be used. At the same time, the annular main reinforcement on the first placement rack is protected, reducing the possibility of deformation of the annular main reinforcement that has been fixed.

[0019] 4. Multiple clamps are used to clamp and fix the annular main reinforcement and axial distribution reinforcement, which improves the overall fixing effect of the secondary lining reinforcement and reduces the possibility of decoupling during the bending process.

[0020] 5. The control terminal adjusts the telescopic stroke of the first telescopic cylinder, the second telescopic cylinder, the third telescopic cylinder, or the fourth telescopic cylinder accordingly to avoid accidental collision, reduce the probability of accidents, and improve safety; at the same time, during the resetting and bonding process, the bonding status of each point is detected in real time and corresponding adjustments are made to improve the bonding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic flow diagram of the method of the present invention; Figure 2 It is a structural schematic diagram of the trolley of the present invention; Figure 3 yes Figure 2 Schematic diagram of the first perspective; Figure 4 yes Figure 1 A partial enlarged schematic diagram of part A; Figure 5 It is a structural schematic diagram of the hidden placement mechanism of the present invention; Figure 6 yes Figure 2 Schematic diagram of the second perspective.

[0022] Explanation of the accompanying drawings: 100, frame; 200, walking mechanism; 300, placing mechanism; 310, first placing rack; 320, second placing rack; 330, third placing rack; 340, fixing hook; 350, clamping plate; 360, adjusting plate; 370, adjusting slot; 400, winding mechanism; 410, first telescopic cylinder; 420, second telescopic cylinder; 430, third telescopic cylinder; 440, fourth telescopic cylinder; 450, rotating shaft; 500, lifting mechanism; 510, lifting cylinder; 520, lifting platform; 530, guide rod; 540, guide platform. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1 To the attached Figure 6The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0026] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] Example 1: The embodiment of the present invention discloses a method for installing geotextile, waterproof board and secondary lining steel bar in a tunnel. Figure 1 A method for installing geotextile, waterproof sheet and secondary lining steel bar in a tunnel mainly comprises the following steps: S1: Secondary lining reinforcement laying: Lay out the secondary lining reinforcement skeleton on a movable trolley according to the tunnel design contour; S2: Geotextile laying: Lay the geotextile on the secondary lining steel frame and level it by tensioning or flattening; S3: Waterproof board fixing: lay the waterproof board on the geotextile, penetrate the waterproof board and geotextile through the connector and anchor it to the secondary lining steel frame; S4: Pre-fixation: fix the secondary lining steel frame to the trolley; S5: Shaping: The secondary lining steel frame, which has been assembled with the geotextile and waterproof sheet, is subjected to controllable elastic bending deformation inwardly toward the tunnel centerline to form a body to be assembled, so that the overall outline size of the body to be assembled is smaller than the minimum size of the contour restriction area in the tunnel; S6: Structural transport: Use a trolley to transport the structure to be assembled along the longitudinal direction of the tunnel, through the internal space restriction area, to the designated installation location; S7: Structural reset and fitting: After reaching the predetermined position, the bending deformation force of the assembly is released, so that the secondary lining steel skeleton elastically recovers to the designed contour shape, and at the same time drives the geotextile and waterproof sheet to fit with the inner wall of the primary support of the tunnel.

[0029] In some embodiments, the connecting piece is a plastic anchor nail or a hot melt welding strip with a self-sealing function; after the plastic anchor nail penetrates the waterproof board, its nail cap or built-in sealing ring automatically closes the penetration hole under the action of the anchoring force; the hot melt welding strip melts during the welding process and fuses with the waterproof board to form a sealed weld.

[0030] In some embodiments, during the laying of the secondary lining steel skeleton in step S1, the overall bending deformation in step S5, the conveying process in step S6, and the resetting process in step S7, a laser positioning system installed in the tunnel and / or on the trolley is used to monitor the three-dimensional spatial coordinates and morphological changes of key points of the secondary lining steel skeleton in real time; Based on the feedback data from the laser positioning system, the curvature of the bending deformation, the deviation of the conveying path and the accuracy of the reset process are dynamically controlled.

[0031] In some embodiments, the S1 step is specifically as follows: S101: Lay out the annular main reinforcement according to the tunnel design outline; S102: Install axial distribution reinforcement on both sides of the trolley and securely connect them to the annular main reinforcement; S103: The top axial distribution ribs are only positioned and placed without being fixed, forming an unclosed bending adjustment space.

[0032] After the step S7, the method further includes: S8: bending the axial distribution reinforcement reserved at the top to a designed curvature, and tying and fixing the axial distribution reinforcement to the annular main reinforcement; S9: Weld or bundle the secondary lining steel bars at both ends of the trolley to the steel bars at the edge of the tunnel invert to complete the fixation.

[0033] The implementation principle of a method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to an embodiment of the present invention is as follows: The process, from pre-fixing to shaping and bending, delivery, and repositioning and bonding, solves the challenge of transporting large waterproof layers within narrow tunnel spaces. While traditional methods require segmented assembly, this solution enables integrated assembly and deformation-free passage, reducing the risk of working at height. It also makes the installation of geotextiles, waterproofing panels, and secondary lining rebar in tunnels more efficient and convenient.

[0034] Example 2: Reference Figures 2 to 6 The embodiment of the present invention differs from the first embodiment in that the trolley includes a frame 100, a traveling mechanism 200 for driving the frame 100, a placement mechanism 300, and a winding mechanism 400. The traveling mechanism 200 is arranged below the frame 100. The placement mechanism 300 includes a first placement rack 310 and a fixing hook 340. The two first placement racks 310 are rotatably connected to the top of the frame 100, and the fixing hook 340 is rotatably connected to the bottom end of the first placement rack 310. There are multiple groups of winding mechanisms 400 along the traveling direction of the trolley. The winding mechanisms 400 include a first telescopic cylinder 410 and a second telescopic cylinder 420. The first telescopic cylinder 410 is relatively arranged on both sides of the frame 100. The cylinder body of the first telescopic cylinder 410 is fixedly connected to the frame 100, and the piston rod of the first telescopic cylinder 410 is connected to the rotation of the first placement rack 310; the cylinder body of the second telescopic cylinder 420 is fixedly connected to the top of the frame 100, and the piston rod of the second telescopic cylinder 420 is fixedly connected to the rotation connection of the two first placement racks 310.

[0035] Two first racks 310 are pivotally connected at the top of the frame 100, forming a retractable "herringbone" support structure. The first telescopic cylinder 410 controls the opening and closing angle, enabling radial contraction of the rebar skeleton (e.g., from a diameter of 10m to 8m), thus preventing scratches when traversing narrow tunnel sections (such as support deformation zones). The first telescopic cylinder 410 drives the racks' lateral rotation, controlling the horizontal curvature. The second telescopic cylinder 420 raises and lowers the hinge point, controlling the vertical arch height. The fixed hook 340 automatically adjusts the hook angle as the racks close, preventing rebar from slipping.

[0036] Reference Figure 2 In some embodiments, the placement mechanism 300 further includes a second placement rack 320 and a third placement rack 330. The second placement rack 320 is connected to multiple groups in a circumferential direction along the trolley's travel direction, and one end of the second placement rack 320 is rotatably connected to one end of the first placement rack 310 through a rotating shaft 450; the third placement rack 330 is connected to multiple groups in a circumferential direction along the trolley's travel direction, and one end of the third placement rack 330 is rotatably connected to one end of the first placement rack 310 through a rotating shaft 450; the second placement rack 320 and the third placement rack 330 are rotatably connected through the rotating shaft 450.

[0037] The second placement rack 320 and the third placement rack can independently adjust the inclination angle (by rotating the shaft 450) to adapt to special-shaped tunnels such as horseshoe-shaped and circular. Multiple groups of second placement racks 320 and third placement racks allow a certain degree of bending between the second placement racks 320 and the third placement rack 330, thereby reducing the local bending degree of the top annular main reinforcement, making the bending more uniform and reducing the possibility of plastic deformation of the annular main reinforcement; the rotational damping between the rotational connections of multiple second placement racks 320 and multiple third placement racks can gradually increase inward, and the two ends rotate first, further reducing the possibility of plastic deformation of the annular main reinforcement.

[0038] Reference Figure 3 In some embodiments, the winding mechanism 400 further includes a third telescopic cylinder 430 and a fourth telescopic cylinder 440, the cylinder body of the third telescopic cylinder 430 is rotatably connected to the frame 100, and the piston rod of the third telescopic cylinder 430 is rotatably connected to the rotating shaft 450 between the first placement rack 310 and the second placement rack 320; the cylinder body of the fourth telescopic cylinder 440 is rotatably connected to the frame 100, and the piston rod of the fourth telescopic cylinder 440 is rotatably connected to the rotating shaft 450 between the first placement rack 310 and the third placement rack 330.

[0039] The third telescopic cylinder 430 adjusts the overall curvature of the first placement rack 310 and the second placement rack 320, and the fourth telescopic cylinder 440 adjusts the overall curvature of the first placement rack 310 and the third placement rack 330, so that the first placement rack 310 can be more easily retracted or restored, and tunnels of various sizes and shapes can be used. At the same time, the annular main reinforcement on the first placement rack 310 is protected, reducing the possibility of deformation of the annular main reinforcement that has been fixed.

[0040] Reference Figure 4 In some embodiments, the placement mechanism 300 further includes a clamping plate 350 fixedly connected to the first placement frame 310. Multiple clamping plates 350 are provided circumferentially along the trolley's travel direction. These multiple clamping plates 350 secure the circumferential main reinforcement and axial distribution reinforcement, improving the overall securement of the secondary lining reinforcement and reducing the possibility of decoupling during the bending process.

[0041] Reference Figure 4 In some embodiments, the placement mechanism 300 further includes multiple adjustment plates 360. The first placement frame 310 is provided with multiple adjustment slots 370. Adjustment rods slide within the adjustment slots 370, and the clamping plates 350 are fixedly connected to the adjustment plates 360. When securing the annular main reinforcement and the axial distribution reinforcement, the operator can slide and adjust the connection between the clamping plates 350 and the reinforcement according to the distribution of the reinforcement, thereby increasing flexibility during the securing process.

[0042] Reference Figure 2 and Figure 3In some embodiments, a lifting mechanism 500 is further included. The lifting mechanism 500 includes multiple lifting cylinders 510, a lifting platform 520, a guide rod 530 and a guide platform 540. One end of the lifting platform 520 is fixedly connected to the walking mechanism 200, and the other end of the lifting platform 520 is fixedly connected to the cylinder body of the lifting cylinder 510. The piston rod of the lifting cylinder 510 is fixedly connected to the frame 100, the lifting platform 520 is fixedly connected to the frame 100, one end of the guide rod 530 is fixedly connected to the lifting platform 520, and the other end of the guide rod 530 is slidably connected to the guide platform 540.

[0043] When laying the secondary lining rebar, the lifting cylinder 510 of the lifting mechanism 500 retracts, lowering the overall height of the placement mechanism 300 to facilitate construction and facilitate the entry of the trolley into the tunnel. During the repositioning and fitting process, the height of the lifting platform 520, and therefore the height of the trolley, can be adjusted accordingly based on the actual conditions of the tunnel floor, ensuring a close fit between the assembly to be assembled and the primary support, thus improving the assembly effect.

[0044] In some embodiments, a first sensor array is formed by multiple distance sensors arranged on the first placement rack 310 along the traveling direction of the trolley; a second sensor array is formed by multiple distance sensors arranged on the first placement rack 310 in the circumferential direction of the traveling direction of the trolley; the first sensor array, the second sensor array, the first telescopic cylinder 410, the second telescopic cylinder 420, the third telescopic cylinder 430 and the lifting cylinder 510 are electrically connected to the control terminal.

[0045] The control terminal is used to receive signals from the first sensor array and the second sensor array. The first sensor array performs real-time detection after the trolley enters the tunnel and feeds back to the control terminal. The control terminal sends relevant instructions to the walking mechanism 200 based on the signal, so that after the trolley enters the tunnel, it can accurately walk to the designated position along the designed route, so that the initial working position of the trolley is within a reasonable range, reducing the errors in the subsequent resetting and bonding steps; the second sensor array detects the distance between the placement mechanism 300 and the initial support of the tunnel in real time. If interference is predicted during the walking process, the control terminal adjusts the telescopic stroke of the first telescopic cylinder 410, the second telescopic cylinder 420 or the third telescopic cylinder 430 or the fourth telescopic cylinder 440 accordingly to avoid accidental collision, reduce the probability of accidents, and improve safety; at the same time, during the resetting and bonding process, the bonding status of each point is detected in real time, and corresponding adjustments are made to improve the bonding effect.

[0046] The implementation principle of the method for installing geotextile, waterproof board and secondary lining steel bar in a tunnel according to the present invention is as follows: The entire process design, from pre-fixing to shaping and bending, to transportation and repositioning, effectively solves the challenge of transporting large waterproofing layers within narrow tunnel spaces. Compared to traditional segmented assembly methods, this allows for integrated assembly and deformation-free passage, reducing the risk of working at height and improving construction efficiency and convenience. The flexible design between the second and third placement frames 320 and 330, along with the gradually increasing inward rotational damping, ensures more uniform local bending of the top annular main reinforcement, reducing the risk of plastic deformation. Adjusting the overall curvature of the placement mechanism 300, using the third and fourth telescopic cylinders 430 and 440, not only enhances the device's adaptability to various tunnel sizes and shapes but also protects the secured annular main reinforcement from deformation. The use of multiple clamps 350 enhances the overall fixation of the secondary lining steel bars and prevents uncoupling during the bending process. The control terminal precisely controls the travel of each telescopic cylinder and monitors the alignment in real time for adjustment. This not only prevents accidental collisions, improves safety, but also optimizes the alignment. This demonstrates a high level of intelligence and automation, providing comprehensive technical support for tunnel construction.

[0047] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for installing geotextile, waterproof sheet and secondary lining steel bar in a tunnel, characterized by: The following steps are included: Secondary lining reinforcement layout: laying out the secondary lining reinforcement skeleton on a movable trolley according to the tunnel design contour; Geotextile laying: Lay the geotextile on the secondary lining steel frame and level it by tensioning or flattening; Waterproof board fixing: lay the waterproof board on the geotextile, penetrate the waterproof board and geotextile through the connector and anchor it to the secondary lining steel frame; Pre-fixation: fix the secondary lining steel frame to the trolley; Shaping: The secondary lining steel frame, which has been assembled with geotextile and waterproof sheet, is subjected to controllable elastic bending deformation inwards towards the tunnel centerline to form a body to be assembled, so that the overall outline size of the body to be assembled is smaller than the minimum size of the restricted area of ​​the tunnel outline; Structural transportation: Use a trolley to transport the structure to be assembled along the longitudinal direction of the tunnel, through the restricted area of ​​the internal space, to the designated installation location; Structural repositioning and fitting: After reaching the predetermined position, the bending deformation force of the assembly is released, so that the secondary lining steel skeleton elastically recovers to the designed contour shape, while driving the geotextile and waterproof sheet to fit the inner wall of the primary support of the tunnel.

2. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 1, characterized in that: The connecting piece is a plastic anchor nail or a hot-melt welding strip with a self-sealing function; after the plastic anchor nail penetrates the waterproof board, its nail cap or built-in sealing ring automatically closes the penetration hole under the action of the anchoring force; the hot-melt welding strip melts during the welding process and fuses with the waterproof board to form a sealed weld.

3. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 1, characterized in that: During the second lining steel bar laying step, the second lining steel bar skeleton is laid out; during the shaping step, the overall bending and deformation is performed; during the structure conveying step, the conveying process; and during the structure resetting and bonding steps, the three-dimensional spatial coordinates and morphological changes of key points of the second lining steel bar skeleton are monitored in real time using a laser positioning system installed in the tunnel and / or on the trolley; According to the feedback data of the laser positioning system, the curvature of the bending deformation, the deviation of the conveying path and the accuracy of the reset process are dynamically controlled.

4. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to any one of claims 1 to 3, characterized in that: The trolley includes a frame (100), a traveling mechanism (200) for driving the frame (100), a placing mechanism (300) and a winding mechanism (400), wherein the traveling mechanism (200) is arranged below the frame (100), and the placing mechanism (300) includes a first placing rack (310) and a fixing hook (340), wherein the two first placing racks (310) are rotatably connected to the top of the frame (100), and the fixing hook (340) is rotatably connected to the bottom end of the first placing rack (310); The winding mechanism (400) is provided with multiple groups along the driving direction of the trolley, and the winding mechanism (400) includes a first telescopic cylinder (410) and a second telescopic cylinder (420). The first telescopic cylinder (410) is relatively arranged on both sides of the frame (100). The cylinder body of the first telescopic cylinder (410) is fixedly connected to the frame (100), and the piston rod of the first telescopic cylinder (410) is connected to the rotation of the first placement rack (310); the cylinder body of the second telescopic cylinder (420) is fixedly connected to the top end of the frame (100), and the piston rod of the second telescopic cylinder (420) is fixedly connected to the rotation connection of the two first placement racks (310).

5. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 4, characterized in that: The placement mechanism (300) further includes a second placement rack (320) and a third placement rack (330), wherein the second placement rack (320) is connected to a plurality of groups in a circumferential direction along the travel direction of the trolley for rotation, and one end of the second placement rack (320) is rotationally connected to one end of the first placement rack (310) via a rotating shaft (450); the third placement rack (330) is connected to a plurality of groups in a circumferential direction along the travel direction of the trolley for rotation, and one end of the third placement rack (330) is rotationally connected to one end of the first placement rack (310) via a rotating shaft (450); the second placement rack (320) and the third placement rack (330) are rotationally connected via the rotating shaft (450).

6. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 5, characterized in that: The rewinding mechanism (400) further includes a third telescopic cylinder (430) and a fourth telescopic cylinder (440), wherein the cylinder body of the third telescopic cylinder (430) is rotatably connected to the frame (100), and the piston rod of the third telescopic cylinder (430) is rotatably connected to the rotating shaft (450) between the first placement rack (310) and the second placement rack (320); the cylinder body of the fourth telescopic cylinder (440) is rotatably connected to the frame (100), and the piston rod of the fourth telescopic cylinder (440) is rotatably connected to the rotating shaft (450) between the first placement rack (310) and the third placement rack (330).

7. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 4, characterized in that: The placement mechanism (300) further comprises a clamping plate (350), wherein the clamping plate (350) is fixedly connected to the first placement rack (310), and a plurality of the clamping plates (350) are provided along the circumference of the trolley's travel direction.

8. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 7, characterized in that: The placement mechanism (300) further comprises a plurality of adjustment plates (360), a plurality of adjustment slots (370) are provided on the first placement frame (310), the adjustment plates (360) slide in the adjustment slots (370), and the clamping plate (350) is fixedly connected to the adjustment plates (360).

9. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 6, characterized in that: The machine also includes a lifting mechanism (500), wherein the lifting mechanism (500) includes a plurality of lifting cylinders (510), a lifting platform (520), a guide rod (530) and a guide platform (540), wherein one end of the lifting platform (520) is fixedly connected to the walking mechanism (200), and the other end of the lifting platform (520) is fixedly connected to the cylinder body of the lifting cylinder (510), the piston rod of the lifting cylinder (510) is fixedly connected to the frame (100), the lifting platform (520) is fixedly connected to the frame (100), one end of the guide rod (530) is fixedly connected to the lifting platform (520), and the other end of the guide rod (530) is slidably connected to the guide platform (540).

10. The method for installing geotextile, waterproof sheet and secondary lining steel bars in a tunnel according to claim 9, characterized in that: A plurality of distance sensors are provided on the first placement rack (310) along the travel direction of the trolley to form a first sensor array; a plurality of distance sensors are provided on the first placement rack (310) in the circumferential direction of the travel direction of the trolley to form a second sensor array; the first sensor array, the second sensor array, the first telescopic cylinder (410), the second telescopic cylinder (420), the third telescopic cylinder (430) and the lifting cylinder (510) are electrically connected to a control terminal.

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