Multifunctional operation trolley for tunnel in-situ reconstruction and extension and construction method of multifunctional operation trolley

Abstract

The invention relates to the technical field of tunnel engineering equipment, in particular to a multifunctional operation trolley for tunnel in-situ reconstruction and extension and a construction method of the multifunctional operation trolley. One end of the second working platform is fixedly connected with a first working platform used for resisting mechanical tunneling, blasting excavation and rock burst impact, and the other end of the second working platform is provided with a third working platform used for quality monitoring and later construction; the second operation platform is connected with the third operation platform through a connecting mechanism; the bottoms of the first working platform, the second working platform and the third working platform are fixedly connected with a plurality of telescopic hydraulic cylinders, and the other ends of the telescopic hydraulic cylinders are provided with bearing rotating type walking mechanisms. By means of the bearing rotating type walking mechanism, the first working platform, the second working platform and the third working platform, full-process integrated construction of tunneling, supporting, explosion prevention, quality monitoring, later-period construction and movement in tunnel extension can be effectively achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering equipment, and in particular to a multifunctional operating trolley for in-situ reconstruction and expansion of a tunnel and a construction method thereof. Background Art

[0002] Currently, with the increasing demand for transportation, the tunnels built earlier can no longer meet people's daily travel needs. There is an urgent need to expand the existing tunnels to meet the upgrading needs of double-track railways, multi-lane highways, etc. However, expanding the existing tunnels faces multiple challenges:

[0003] 1. Complex construction environment: The existing tunnel structure and surrounding rock are subject to long-term disturbance during operation, making it very easy for block falling and collapse to occur during excavation and construction;

[0004] 2. Interference between work processes: In traditional phased construction, tunneling, support, and monitoring equipment are brought in alternately. Frequent equipment movement is not only inefficient but also more likely to cause safety accidents such as mechanical collisions and rockfalls.

[0005] 3. Insufficient safety protection: During construction, existing vehicles must be allowed to pass through, resulting in a narrow working space and increasing the difficulty of equipment layout and personnel safety protection;

[0006] 4. Lack of real-time feedback on construction quality: Existing technologies rely on manual inspections and static monitoring, making it difficult to provide timely feedback on construction quality.

[0007] 5. Limited construction space: The existing trolley can only move unilaterally, and the height and width of the trolley cannot be dynamically adjusted according to the working section, resulting in reduced construction efficiency;

[0008] Therefore, there is an urgent need for a multifunctional operating trolley for in-situ reconstruction and expansion of tunnels and a construction method thereof to solve the above problems. Summary of the Invention

[0009] The purpose of the present invention is to provide a multifunctional operation trolley for in-situ reconstruction and expansion of a tunnel and a construction method thereof, so as to solve the problems existing in the above-mentioned prior art.

[0010] To achieve the above-mentioned objectives, the present invention provides the following solution: a multifunctional work platform for in-situ renovation and expansion of a tunnel, comprising a second work platform for mechanical excavation and initial support, one end of the second work platform is fixedly connected to a first work platform for resisting mechanical excavation, blasting excavation and rock burst impact, and the other end of the second work platform is provided with a third work platform for quality monitoring and later construction; the second work platform is connected to the third work platform through a connecting mechanism; the bottom of the first work platform, the second work platform and the third work platform are all fixedly connected with a plurality of telescopic hydraulic cylinders, and the other end of the telescopic hydraulic cylinder is provided with a bearing rotary walking mechanism.

[0011] Preferably, the first working platform includes a first trolley, both sides of the first trolley are fixedly connected with a lifting buffer mechanism, a detachable protective cover is provided above the first trolley, and the detachable protective cover is connected to the lifting buffer mechanism.

[0012] Preferably, the lifting buffer mechanism includes a spring damper fixedly connected to the outer wall of the first trolley, and the movable end of the spring damper is connected to the detachable protective cover through a hydraulic telescopic rod.

[0013] Preferably, the second working platform includes a second trolley, a first robotic arm is installed in the middle of the top surface of the second trolley, second robotic arms are respectively provided on both sides of the first robotic arm, the second robotic arm is installed on the top surface of the second trolley, a third robotic arm is provided below the second robotic arm, and the third robotic arm is installed on the side wall of the second trolley.

[0014] Preferably, the width of the first trolley is not greater than the width of the second trolley.

[0015] Preferably, the third working platform includes a third vehicle, and a secondary extendable working platform is symmetrically provided on the top surface of the third vehicle, and a three-degree-of-freedom robotic arm is installed on the top surface of the secondary extendable working platform.

[0016] Preferably, the bottom surface of the secondary extendable work platform is symmetrically provided with slide rails, the slide rails are installed on the top surface of the third trolley, and the slide rails are slidably connected to the secondary extendable work platform.

[0017] Preferably, the connecting mechanism includes two relatively arranged and matched close-fit couplers, and the two close-fit couplers are respectively provided with a convex cone and a concave conical hole at the opposite ends, and a semicircular groove is provided at the connection between the convex cone and the concave conical hole, and a hook tongue is rotatably connected in the semicircular groove, and a deconstruction rod is fixedly connected to the end of the hook tongue facing the semicircular groove, and a hook head is connected to the middle part of the deconstruction rod extending out of the semicircular groove, and a spring is connected to the end of the hook head away from the deconstruction rod, and the end of the spring away from the hook head is installed on the outer wall of the close-fit coupler.

[0018] Preferably, the bearing rotation type walking mechanism includes a support seat fixedly connected to the bottom of the telescopic hydraulic cylinder, the bottom center of the support seat is rotatably connected to a rotatable bearing, the end of the rotatable bearing away from the support seat is fixedly connected to a walking wheel group, and the two sides of the two walking wheel groups facing away from each other are respectively provided with a hydraulic lifting mechanism, and the hydraulic lifting mechanism is installed at the bottom of the support seat.

[0019] A construction method for in-situ tunnel reconstruction and expansion, comprising the following steps:

[0020] S1. Connecting the third work platform to the second work platform through a connecting mechanism;

[0021] S2. The first operating platform, the second operating platform, and the third operating platform are moved to the location where expansion is required by the bearing rotary walking mechanism;

[0022] S3. Adjust the first working platform and make the first working platform fit the inner wall of the existing tunnel contour;

[0023] S4. Mechanical excavation operations are performed on the inner wall of the existing tunnel above the first working platform through the second working platform to form an expanded tunnel outline, and initial support operations are performed on the inner wall of the expanded tunnel outline;

[0024] S5. Monitor the quality through the third work platform and adjust the subsequent construction work of the second work platform in real time according to the monitoring data.

[0025] The present invention discloses the following technical effects:

[0026] The present invention drives the movement of the first working platform, the second working platform and the third working platform through a bearing rotary walking mechanism, and uses the first working platform to resist the mechanical excavation, blasting excavation and rock burst impact operations of the second working platform. At the same time, the third working platform performs real-time quality monitoring and subsequent construction operations, and adjusts the construction operations of the second working platform in real time. It can effectively realize the full-process integrated construction of excavation, support, explosion protection, quality monitoring, subsequent construction and movement in tunnel expansion, thereby improving construction efficiency and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 This is a schematic diagram of the overall structure of the trolley of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the trolley from above of the present invention;

[0030] Figure 3 This is a schematic diagram of the overall structure of the explosion-proof working trolley of the present invention;

[0031] Figure 4 This is a schematic diagram of the overall structure of the mechanical excavation and initial support operation trolley of the present invention;

[0032] Figure 5 This is a schematic diagram of the overall structure of the quality monitoring and later construction operation trolley of the present invention;

[0033] Figure 6 This is a schematic structural diagram of the explosion-proof working platform of the present invention;

[0034] Figure 7 This is a schematic diagram of the mechanical excavation and initial support operation platform structure of the present invention;

[0035] Figure 8 This is a schematic diagram of the quality monitoring and post-construction operation platform structure of the present invention;

[0036] Figure 9 This is a front view structural diagram of the telescopic hydraulic cylinder of the present invention;

[0037] Figure 10 This is a schematic side view of the telescopic hydraulic cylinder of the present invention;

[0038] Figure 11 This is a structural diagram of the bearing rotary walking mechanism of the present invention;

[0039] Figure 12 This is a schematic diagram of the structure of two close-fitting couplers of the present invention after being connected;

[0040] Figure 13 This is a schematic diagram of the close-fitting coupler structure of the present invention;

[0041] Among them, 1. First car; 2. Second car; 3. Third car; 4. Telescopic hydraulic cylinder; 5. Bearing rotary walking mechanism; 6. Close-fitting coupler; 7. Removable protective cover; 8. Lifting and buffering mechanism; 9. Shock-absorbing pad; 10. High-strength steel layer; 11. Kevlar honeycomb layer; 12. Hydraulic damping array; 13. Magnetorheological elastomer layer; 14. Hydraulic telescopic rod; 15. Spring damper; 16. First robotic arm; 17. Second robotic arm; 18. Third robotic arm; 19. Drill tool head; 20. Anchor bolt installer tool head; 21. Shotcrete nozzle tool head; 22. First auxiliary Working platform; 23. Material bin; 24. Slide rail; 25. Secondary extendable working platform; 26. Three-degree-of-freedom robotic arm; 27. Ultrasonic phased array probe; 28. Second auxiliary working platform; 29. ​​Guardrail; 30. Removable escalator; 31. Straight ladder; 32. High-strength supporting connecting steel block; 33. Hydraulic cylinder; 34. High-strength telescopic rod; 35. Hydraulic lifting mechanism; 36. Rotatable bearing; 37. Travel wheel set; 38. Hook head; 39. Hook tongue; 40. Deconstruction rod; 41. Spring; 42. Convex cone; 43. Concave cone hole; I. Existing tunnel outline; II. Expanded tunnel outline. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figures 1 to 13The present invention provides a multifunctional work platform for in-situ reconstruction and expansion of tunnels, including a second work platform for mechanical excavation and initial support, one end of the second work platform is fixedly connected to a first work platform for resisting mechanical excavation, blasting excavation and rock burst impact, and the other end of the second work platform is provided with a third work platform for quality monitoring and later construction; the second work platform is connected to the third work platform through a connecting mechanism; the bottom of the first work platform, the second work platform and the third work platform are all fixedly connected to a plurality of telescopic hydraulic cylinders 4, and the other end of the telescopic hydraulic cylinder 4 is provided with a bearing rotary walking mechanism 5.

[0045] The present invention drives the first working platform, the second working platform and the third working platform to move through the bearing rotary walking mechanism 5, and uses the first working platform to resist the mechanical excavation, blasting excavation and rock burst impact operations of the second working platform. At the same time, the third working platform performs real-time quality monitoring and subsequent construction operations, and adjusts the construction operations of the second working platform in real time. It can effectively realize the full-process integrated construction of excavation, support, explosion protection, quality monitoring, subsequent construction and movement in tunnel expansion, thereby improving construction efficiency and safety.

[0046] To further optimize the solution, the first working platform includes a first vehicle 1, and both sides of the first vehicle 1 are fixedly connected with a lifting buffer mechanism 8. A detachable protective cover 7 is provided above the first vehicle 1, and the detachable protective cover 7 is connected to the lifting buffer mechanism 8.

[0047] The detachable protective cover 7 is made to fit the existing tunnel profile I by means of the lifting and buffering mechanism 8 .

[0048] The detachable protective cover 7 integrates a high-strength steel layer 10, a Kevlar honeycomb layer 11, a hydraulic damping array 12 and a magnetorheological elastomer layer 13 from the outside to the inside. A shock-absorbing pad 9 is arranged between the magnetorheological elastomer layer 13 and the top surface of the first vehicle 1, and adopts a multi-layer steel plate-rubber material structure to absorb vibration energy.

[0049] A pressure sensor is installed on the side of the high-strength steel layer 10 facing the existing tunnel profile I, and the pressure sensor is used to monitor the contact pressure in real time.

[0050] According to a further optimized solution, the lifting buffer mechanism 8 includes a spring damper 15 fixedly connected to the outer wall of the first vehicle 1 , and the movable end of the spring damper 15 is connected to the detachable protective cover 7 through a hydraulic telescopic rod 14 .

[0051] The detachable protective cover 7 is made to fit the existing tunnel profile I by means of the hydraulic telescopic rod 14 .

[0052] The magnetorheological elastomer layer 13 and the shock-absorbing pad layer 9 are connected via a spring damper 15 .

[0053] To further optimize the solution, the second working platform includes a second trolley 2, a first robotic arm 16 is installed in the middle of the top surface of the second trolley 2, second robotic arms 17 are respectively provided on both sides of the first robotic arm 16, the second robotic arm 17 is installed on the top surface of the second trolley 2, a third robotic arm 18 is provided below the second robotic arm 17, and the third robotic arm 18 is installed on the side wall of the second trolley 2.

[0054] The first robotic arm 16 , the second robotic arm 17 , and the third robotic arm 18 are hydraulic robotic arms with six degrees of freedom. Switchable tool heads are integrated at the ends of the robotic arms of the first robotic arm 16 , the second robotic arm 17 , and the third robotic arm 18 .

[0055] The first robotic arm 16 has a drill tool head 19 at its distal end, the second robotic arm 17 has a bolt installer tool head 20 at its distal end, and the third robotic arm 18 has a shotcrete nozzle tool head 21 at its distal end.

[0056] The first robotic arm 16, the second robotic arm 17, and the third robotic arm 18 are all controlled by the central controller. Under the scheduling of the central controller, the first robotic arm 16, the second robotic arm 17, and the third robotic arm 18 can operate synchronously to avoid motion interference; a first auxiliary working platform 22 is provided below the third robotic arm 18, and the first auxiliary working platform 22 is fixedly connected to the outer wall of the second trolley 2. A material bin 23 is placed on the first auxiliary working platform 22, and the material bin 23 is used to store shotcrete materials.

[0057] In a further optimized solution, the width of the first vehicle 1 is not greater than the width of the second vehicle 2, so that the first vehicle 1 can move within the existing tunnel profile I.

[0058] To further optimize the solution, the third working platform includes a third vehicle 3 , and a secondary extendable working platform 25 is symmetrically provided on the top surface of the third vehicle 3 , and a three-degree-of-freedom robotic arm 26 is installed on the top surface of the secondary extendable working platform 25 .

[0059] To further optimize the solution, the bottom surface of the secondary extendable working platform 25 is symmetrically provided with a slide rail 24 , the slide rail 24 is installed on the top surface of the third vehicle 3 , and the slide rail 24 is slidably connected to the secondary extendable working platform 25 .

[0060] An anti-collision pad is installed at the end of the secondary extendable working platform 25 to prevent it from colliding when it is extended and retracted along the slide rail 24 to the expanded tunnel profile II; a second auxiliary working platform 28 is set on both sides of the third working platform, and protective railings 29 are provided on the left and right sides of the second auxiliary working platform 28 to ensure the safety of construction workers; construction workers can reach the second auxiliary working platform 28 to work through a detachable escalator 30; a straight ladder 31 is set at the end of the second auxiliary working platform 28 to connect with the main working platform of the third working platform, which can meet the construction workers' needs for maintenance and replacement of mechanical equipment.

[0061] An ultrasonic phased array probe 27 is installed at the end of the three-degree-of-freedom robotic arm 26, which can detect the lining thickness and defects in real time. When a defect is detected, repair tools and materials can be loaded onto the secondary extendable working platform 25 and extended from the slide rail 24 to the defect location for repair.

[0062] The slide rail 24 is driven by a servo motor so that the secondary extendable working platform 25 can move along the slide rail 24 .

[0063] A further optimized solution is provided, in which the connecting mechanism includes two relatively arranged and matched close-fit couplers 6, and a convex cone 42 and a concave conical hole 43 are respectively provided at the opposite ends of the two close-fit couplers 6. A semicircular groove is provided at the connection between the convex cone 42 and the concave conical hole 43, and a hook tongue 39 is rotatably connected in the semicircular groove. The end of the hook tongue 39 facing the semicircular groove is fixedly connected to a deconstruction rod 40, and the middle part of the deconstruction rod 40 extending out of the semicircular groove is connected to a hook head 38, and the end of the hook head 38 away from the deconstruction rod 40 is connected to a spring 41, and the end of the spring 41 away from the hook head 38 is installed on the outer wall of the close-fit coupler 6.

[0064] The two close-fitting couplers 6 are respectively fixedly connected to the outer wall of the second trolley 2 and the third trolley 3 on one side opposite to each other.

[0065] When the second trolley 2 is connected to the third trolley 3, the convex cone 42 on one side is inserted into the concave cone hole 43 on the other side. The convex cone 42 presses the hook tongue 39 to rotate and compresses the spring 41 to achieve connection; when the second trolley 2 is separated from the third trolley 3, the spring 41 is driven by the deconstruction rod 40 and the hook head 38 to stretch and drive the hook tongue 39 to rotate, thereby achieving decoupling of the second trolley 2 from the third trolley 3.

[0066] A further optimized solution is that the bearing rotation type walking mechanism 5 includes a support seat fixedly connected to the bottom of the telescopic hydraulic cylinder 4, and a rotatable bearing 36 is rotatably connected to the bottom center of the support seat. The end of the rotatable bearing 36 away from the support seat is fixedly connected to a walking wheel group 37, and the two walking wheel groups 37 are respectively provided with a hydraulic lifting mechanism 35 on the side facing away from each other, and the hydraulic lifting mechanism 35 is installed at the bottom of the support seat.

[0067] A groove is provided at the center of the top surface of the support seat, and one end of the rotatable bearing 36 extending into the groove is transmission-connected to a drive motor, which is installed in the groove.

[0068] When the first trolley 1, the second trolley 2, and the third trolley 3 need to move laterally, the first trolley 1, the second trolley 2, and the third trolley 3 are lifted by the hydraulic lifting mechanisms 35 on both sides of the traveling wheel group 37; after the first trolley 1, the second trolley 2, and the third trolley 3 are lifted, the traveling wheel group 37 is separated from the ground, and the driving motor drives the rotatable bearing 36 to rotate 90°. After the rotation, the direction locking error of the traveling wheel group 37 is ≤0.5°. After the adjustment is completed, the hydraulic lifting mechanisms 35 on both sides of the traveling wheel group 37 lower the first trolley 1, the second trolley 2, and the third trolley 3, so that the traveling wheel group 37 contacts the ground, thereby realizing the lateral movement of the first trolley 1, the second trolley 2, and the third trolley 3, meeting the needs of the lateral working space.

[0069] The two ends of the telescopic hydraulic cylinder 4 are connected to the first trolley 1, the second trolley 2, the third trolley 3 and the bearing rotary walking mechanism 5 through high-strength supporting connecting steel blocks 32; when the vertical height of the first trolley 1, the second trolley 2, and the third trolley 3 needs to be adjusted, the telescopic hydraulic cylinder 4 extends or retracts the high-strength telescopic rod 34 through the hydraulic cylinder 33 to adjust the vertical height of the trolley, thereby meeting the height requirements of different working spaces.

[0070] The structure of the hydraulic lifting mechanism 35 adopts the structure of the telescopic hydraulic cylinder 4.

[0071] A construction method for in-situ tunnel reconstruction and expansion, comprising the following steps:

[0072] S1. Connect the third work platform to the second work platform through a connecting mechanism; insert the convex cone 42 of one side into the concave cone hole 43 of the other side, the convex cone 42 presses the hook tongue 39 to rotate, and compresses the spring 41 to achieve connection.

[0073] Different work platforms are connected through a close-coupled coupler 6 to form a collaborative construction work line, realizing serial collaborative construction of multiple work platforms; the central controller synchronizes the movements of each robotic arm on the first work platform, the second work platform, and the third work platform to avoid overlapping construction at the intersection of sections.

[0074] S2. The first, second, and third work platforms are moved to the locations where expansion is required through the bearing rotary travel mechanism 5; and the positions are calibrated through the laser positioning system.

[0075] S3. Adjust the first working platform and make it fit the inner wall of the existing tunnel profile I.

[0076] Start the first working platform: the lifting buffer mechanism 8 drives the detachable protective cover 7 to rise to the arch of the existing tunnel profile I, and the pressure sensor monitors the contact pressure in real time.

[0077] S4. Coordinated mechanical excavation and initial support: The central controller issues construction instructions: the first robotic arm 16, the second robotic arm 17, and the third robotic arm 18 advance in a "drilling → anchoring → grouting" cycle respectively. The central controller dynamically adjusts the paths of the first robotic arm 16, the second robotic arm 17, and the third robotic arm 18 to ensure that the minimum safe distance between the first robotic arm 16, the second robotic arm 17, and the third robotic arm 18 is ≥0.8m; mechanical excavation operations are performed on the inner wall of the existing tunnel profile I above the first working platform through the second working platform to form the expanded tunnel profile II, and initial support operations are performed on the inner wall of the expanded tunnel profile II.

[0078] S5. Real-time quality monitoring and feedback control: Monitor quality through the third work platform and adjust the subsequent construction work of the second work platform in real time based on the monitoring data.

[0079] The ultrasonic phased array probe 27 scans along the secondary extendable working platform 25 every time it advances 1m, detecting the data of the expanded tunnel profile II and analyzing it in real time; if a cavity defect is found, the secondary extendable working platform 25 is extended to the defect location, carrying repair tools and materials for repair.

[0080] During the construction process, vertical height adjustment and lateral displacement adjustment are also required.

[0081] When adjusting the vertical height, the following operations are performed: the telescopic hydraulic cylinder 4 adjusts the vertical heights of the first trolley 1 , the second trolley 2 , and the third trolley 3 by adjusting the high-strength telescopic rod 34 .

[0082] During lateral movement, the following operations are performed: the lateral hydraulic lifting mechanism 35 lifts the trolley; the motor drives the rotatable bearing 36 to rotate 90°, and the encoder is locked after confirming that it is in place; after the walking wheel group 37 moves horizontally, the hydraulic lifting mechanism 35 is reset.

[0083] The first working platform of the present invention forms a three-level protection system of "impact dispersion-energy absorption-vibration isolation" through a detachable protective cover, a lifting buffer mechanism and a shock-absorbing pad to reduce equipment damage and overcome the lack of special protection against blasting impact and rock burst in traditional equipment.

[0084] The present invention integrates the three working processes of drilling, anchoring and spraying through the second working platform. The first robotic arm 16, the second robotic arm 17 and the third robotic arm 18 realize synchronous operation under the scheduling of the central controller, thereby shortening the single-cycle construction time. At the same time, the third working platform is directly embedded in the construction process, and real-time detection and repair are seamlessly connected, overcoming the problem that the existing technology relies on multiple single-function equipment for phased construction, resulting in serious time-consuming equipment switching.

[0085] The bearing rotating traveling mechanism 5 of the present invention can realize the lateral movement of the trolley through hydraulic lifting and 90° bearing rotation, overcoming the problem that the existing trolley cannot move laterally due to the fixed traveling mechanism, and the entire lane needs to be closed during construction, which seriously hinders traffic.

[0086] The present invention supports multiple working platforms connected in series to form a flexible working line through the close-fitting coupler 6 and the expandable slide rail design, overcoming the problem that the existing trolleys are rigid in function and difficult to adapt to different tunnel sections and geological conditions.

[0087] The present invention realizes real-time data fusion analysis of lining thickness and cavity defects through the monitoring module of the ultrasonic phased array probe 27, overcoming the problems of traditional methods relying on manual sampling detection, high lining thickness error exceeding limit rate, and delayed defect repair.

[0088] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0089] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A multifunctional operation vehicle for in-situ tunnel reconstruction and expansion, characterized by: It includes a second working platform for mechanical excavation and initial support, one end of which is fixedly connected to a first working platform for resisting mechanical excavation, blasting excavation and rock burst impact, and the other end of the second working platform is provided with a third working platform for quality monitoring and later construction; the second working platform is connected to the third working platform via a connecting mechanism; The bottoms of the first working platform, the second working platform and the third working platform are all fixedly connected with a plurality of telescopic hydraulic cylinders (4), and the other ends of the telescopic hydraulic cylinders (4) are provided with bearing rotary walking mechanisms (5).

2. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 1 is characterized in that: The first working platform comprises a first trolley (1), both sides of the first trolley (1) are respectively fixedly connected with a lifting buffer mechanism (8), a detachable protective cover (7) is provided above the first trolley (1), and the detachable protective cover (7) is connected to the lifting buffer mechanism (8).

3. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 2 is characterized in that: The lifting and buffering mechanism (8) comprises a spring damper (15) fixedly connected to the outer wall of the first trolley (1), and the movable end of the spring damper (15) is connected to the detachable protective cover (7) via a hydraulic telescopic rod (14).

4. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 2 is characterized in that: The second working platform comprises a second trolley (2), a first mechanical arm (16) is installed in the middle of the top surface of the second trolley (2), second mechanical arms (17) are respectively provided on both sides of the first mechanical arm (16), the second mechanical arm (17) is installed on the top surface of the second trolley (2), a third mechanical arm (18) is provided below the second mechanical arm (17), and the third mechanical arm (18) is installed on the side wall of the second trolley (2).

5. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 4 is characterized in that: The width of the first trolley (1) is not greater than the width of the second trolley (2).

6. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 1 is characterized in that: The third working platform comprises a third vehicle (3), a top surface of the third vehicle (3) is symmetrically provided with a secondary extendable working platform (25), and a three-degree-of-freedom mechanical arm (26) is installed on the top surface of the secondary extendable working platform (25).

7. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 6 is characterized in that: The bottom surface of the secondary extendable work platform (25) is symmetrically provided with a slide rail (24), and the slide rail (24) is installed on the top surface of the third trolley (3). The slide rail (24) is slidably connected to the secondary extendable work platform (25).

8. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 1 is characterized in that: The connecting mechanism comprises two relatively arranged and matched close-fitting couplers (6), and the two close-fitting couplers (6) are respectively provided with a convex cone (42) and a concave cone hole (43) at the opposite ends thereof, and a semicircular groove is provided at the connection between the convex cone (42) and the concave cone hole (43), and a hook tongue (39) is rotatably connected in the semicircular groove, and the hook tongue (39) is fixedly connected to a deconstruction rod (40) at one end thereof facing the semicircular groove, and the middle part of the deconstruction rod (40) extending out of the semicircular groove is connected to a hook head (38), and the end of the hook head (38) away from the deconstruction rod (40) is connected to a spring (41), and the end of the spring (41) away from the hook head (38) is mounted on the outer wall of the close-fitting coupler (6).

9. The multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to claim 1 is characterized in that: The bearing rotary walking mechanism (5) comprises a support seat fixedly connected to the bottom of the telescopic hydraulic cylinder (4); a rotatable bearing (36) is rotatably connected to the center of the bottom of the support seat; a walking wheel group (37) is fixedly connected to one end of the rotatable bearing (36) away from the support seat; a hydraulic lifting mechanism (35) is respectively provided on the side of the two walking wheel groups (37) facing away from each other; and the hydraulic lifting mechanism (35) is installed at the bottom of the support seat.

10. A construction method for in-situ tunnel reconstruction and expansion, based on the multifunctional operation vehicle for in-situ tunnel reconstruction and expansion according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Connecting the third work platform to the second work platform through a connecting mechanism; S2. The first operating platform, the second operating platform, and the third operating platform are moved to a position where expansion is required by the bearing rotary walking mechanism (5); S3. Adjust the first working platform and make the first working platform fit the inner wall of the existing tunnel contour (I); S4. Mechanically excavating the inner wall of the existing tunnel profile (I) above the first working platform using the second working platform to form the expanded tunnel profile (II), and performing initial support operations on the inner wall of the expanded tunnel profile (II); S5. Monitor the quality through the third work platform and adjust the subsequent construction work of the second work platform in real time according to the monitoring data.

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