Tunneling main machine, tunneling equipment and tunneling system

Abstract

The invention provides a tunneling main machine, tunneling equipment and a tunneling system, and belongs to the field of tunnel construction equipment. The tunneling main machine comprises a main beam extending front and back and a corner excavation device arranged on the main beam and used for excavating corners on the two sides of a tunnel, and further comprises a supporting shoe structure and a supporting structure which are arranged on the main beam. A propelling device used for propelling the main beam to move forwards when the supporting shoe structure tightly supports the tunnel wall is arranged between the supporting shoe structure and the main beam, and the supporting structure is used for supporting the main beam when the supporting shoe structure changes steps. The tunneling equipment comprises the tunneling main machine. The tunneling system comprises the tunneling equipment. The tunneling main machine can work independently of a tunneling machine for excavating the round section tunnel, the turnover efficiency of equipment is improved, and the overall construction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the field of tunnel construction equipment, and in particular relates to a tunneling main machine, tunneling equipment and a tunneling system. Background Art

[0002] Circular tunnels have high cross-sectional stability and the relevant construction equipment is relatively mature, so circular tunnels are more widely used. However, the bottom of a circular tunnel is an inverted arch. If it is used as a rubber tube tunnel, the inverted arch at the bottom needs secondary treatment to be leveled, which not only increases the construction cost, but also reduces the utilization rate of the tunnel section.

[0003] The tunnel in the shape of a city gate has an arched top, straight walls and a flat bottom, and has the advantages of good top stress and a flat and open bottom, which can effectively improve the utilization rate of the tunnel section. The tunnel in the shape of a city gate needs to be excavated using special excavation equipment. For example, the Chinese invention patent application with application publication number CN114562283A discloses a special-shaped tunnel corner excavation device and a special-shaped tunnel boring machine, wherein the special-shaped tunnel boring machine is provided with a special-shaped tunnel corner excavation device on the main beam of the tunnel boring machine, and the circular cutter head at the front end of the tunnel boring machine is used to first excavate the circular cross-section of the tunnel, and then the corners are removed by the special-shaped tunnel corner excavation device to obtain a tunnel in the shape of a city gate.

[0004] The special-shaped tunnel corner excavation device uses a wheeled cutterhead to break rock and excavate the corners of the tunnel. During the construction process, it is difficult to match the excavation speed of the wheeled cutterhead with the circular cutterhead at the front end of the tunnel boring machine. When the excavation speeds do not match, the two will restrict each other, resulting in low overall tunnel excavation efficiency. In projects with a large number of tunnels and equipment turnover excavation, the mutual restriction between the circular cutterhead and the wheeled cutterhead will also lead to low equipment turnover efficiency. In addition, since tracks are laid at the bottom of the tunnel and space needs to be left under the main beam of the tunnel boring machine for material vehicles to pass through, it is difficult for the special-shaped tunnel corner excavation device to cover the entire range of the tunnel bottom, resulting in poor flatness of the tunnel bottom. Moreover, the slag produced by the special-shaped tunnel corner excavation device needs to be cleaned out in a timely manner, so slag cleaning equipment needs to be configured behind it, but the space behind it is limited, and the arrangement of slag cleaning equipment is difficult. Summary of the invention

[0005] One of the purposes of the present invention is to provide a tunneling main machine, which can solve the technical problem of low construction efficiency caused by the mutual restriction between the circular cutter head used for excavating circular cross-section tunnels and the wheel cutter head used for excavating corners in the prior art after being matched with a matching vehicle; One of the purposes of the present invention is to provide a tunneling device to solve the above technical problems; One of the objectives of the present invention is to provide a tunneling system to solve the above technical problems.

[0006] To achieve the above purpose, the technical solution of the tunneling mainframe provided by the present invention is: A tunneling machine includes a main beam extending forward and backward and a corner excavation device arranged on the main beam and used for excavating the corners on both sides of the tunnel. It also includes a support shoe structure and a support structure arranged on the main beam. A propulsion device is arranged between the support shoe structure and the main beam to propel the main beam forward when the support shoe structure tightens the tunnel wall. The support structure is used to support the main beam when the support shoe structure changes steps.

[0007] As a further improvement, the corner excavation device includes two corner excavation cutter discs respectively located on the left and right sides of the main beam and a bottom excavation cutter disc located below the main beam. The bottom excavation cutter disc and the two corner excavation cutter discs are staggered front and back.

[0008] As a further improvement, the rotation center lines of the corner excavation cutter disc and the bottom excavation cutter disc are both horizontal and in the same direction as the left and right directions.

[0009] As a further improvement, the corner excavation device is located behind the support shoe structure and the supporting structure.

[0010] As a further improvement, the supporting structure comprises at least a front supporting leg which is located in front of the support shoe structure and can be telescoped up and down.

[0011] As a further improvement, the supporting structure further comprises a rear supporting leg which is located behind the support shoe structure and can be telescoped up and down.

[0012] As a further improvement, the supporting structure includes front legs and rear legs that can be extended and retracted up and down, and the corner excavation device and the support shoe structure are both located between the front legs and the rear legs.

[0013] As a further improvement, the support shoe structure includes a front support shoe assembly and a rear support shoe assembly, and a fixing member for fixedly connecting the front support shoe assembly and the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly. The front support shoe assembly is located in front of the corner excavation device, and the rear support shoe assembly is located behind the corner excavation device. The rear support shoe assembly includes a base portion installed on the main beam and three Y-shaped support arms arranged on the base portion, two of which are located above the base portion and are used to tighten the arched top wall of the tunnel, and the other support arm is located below the base portion and is used to vertically tighten the bottom wall of the tunnel downward.

[0014] As a further improvement, the support shoe structure comprises a front support shoe assembly and a rear support shoe assembly, and a fastening member for fixedly connecting the front support shoe assembly with the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly.

[0015] As a further improvement, the propulsion device is connected between the front support shoe assembly and a connecting seat arranged on the main beam, and the connecting seat is located in front of the front support shoe assembly.

[0016] The beneficial effect is that the tunneling main machine provided by the present invention is a pioneering invention. During the normal tunneling process of the tunneling main machine, the support shoe structure can be used to support it on the tunnel wall, and then the propulsion device can be used to push the main beam forward, thereby driving the corner excavation device to dig forward and excavate the corners on both sides of the tunnel; during the step-changing process of the support shoe structure, the support structure provides support for the main beam, and the propulsion device is used to drive the support shoe structure to move forward relative to the main beam. The tunneling main machine has independent support and propulsion power, so it can work independently of the tunneling machine for excavating circular cross-section tunnels, so that it will not restrict each other with the tunneling machine for excavating circular cross-section tunnels. The tunneling machine for excavating circular cross-section tunnels can be transferred to other construction sites after the excavation is completed to improve the turnover efficiency of the equipment, thereby improving the overall construction efficiency.

[0017] To achieve the above purpose, the technical solution of the tunneling equipment provided by the present invention is: A tunneling equipment includes a supporting vehicle and a tunneling main machine. The tunneling machine main machine includes a main beam extending forward and backward and a corner excavation device arranged on the main beam and used for excavating the corners on both sides of the tunnel. It also includes a support shoe structure and a support structure arranged on the main beam. A propulsion device is arranged between the support shoe structure and the main beam to propel the main beam forward when the support shoe structure supports the tunnel wall. The support structure is used to support the main beam when the support shoe structure changes steps.

[0018] As a further improvement, the corner excavation device includes two corner excavation cutter discs respectively located on the left and right sides of the main beam and a bottom excavation cutter disc located below the main beam. The bottom excavation cutter disc and the two corner excavation cutter discs are staggered front and back.

[0019] As a further improvement, the rotation center lines of the corner excavation cutter disc and the bottom excavation cutter disc are both horizontal and in the same direction as the left and right directions.

[0020] As a further improvement, the corner excavation device is located behind the support shoe structure and the supporting structure.

[0021] As a further improvement, the supporting structure comprises at least a front supporting leg which is located in front of the support shoe structure and can be telescoped up and down.

[0022] As a further improvement, the supporting structure further comprises a rear supporting leg which is located behind the support shoe structure and can be telescoped up and down.

[0023] As a further improvement, the supporting structure includes front legs and rear legs that can be extended and retracted up and down, and the corner excavation device and the support shoe structure are both located between the front legs and the rear legs.

[0024] As a further improvement, the support shoe structure includes a front support shoe assembly and a rear support shoe assembly, and a fixing member for fixedly connecting the front support shoe assembly and the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly. The front support shoe assembly is located in front of the corner excavation device, and the rear support shoe assembly is located behind the corner excavation device. The rear support shoe assembly includes a base portion installed on the main beam and three Y-shaped support arms arranged on the base portion, two of which are located above the base portion and are used to tighten the arched top wall of the tunnel, and the other support arm is located below the base portion and is used to vertically tighten the bottom wall of the tunnel downward.

[0025] As a further improvement, the support shoe structure comprises a front support shoe assembly and a rear support shoe assembly, and a fastening member for fixedly connecting the front support shoe assembly with the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly.

[0026] As a further improvement, the propulsion device is connected between the front support shoe assembly and a connecting seat arranged on the main beam, and the connecting seat is located in front of the front support shoe assembly.

[0027] As a further improvement, the supporting vehicle is connected in front of the main boring machine.

[0028] As a further improvement, a direction adjustment structure is provided between the front end of the main beam of the tunneling main machine and the supporting vehicle. The direction adjustment structure includes two connecting parts arranged on the left and right. The front end of each connecting part is movably connected to the supporting vehicle, and the rear end is movably connected to the main beam. At least one connecting part is a retractable telescopic connecting part.

[0029] The beneficial effect is that the tunneling equipment provided by the present invention is a pioneering invention. During the normal tunneling process of the tunneling equipment, the support shoe structure can be used to support the tunnel wall, and then the propulsion device can be used to push the main beam forward, thereby driving the corner excavation device to dig forward and excavate the corners on both sides of the tunnel; during the step-changing process of the support shoe structure, the support structure provides support for the main beam, and the propulsion device is used to drive the support shoe structure to move forward relative to the main beam. The tunneling main machine has independent support and propulsion power, so it can work independently of the tunneling machine for excavating circular cross-section tunnels, so that it will not restrict each other with the tunneling machine for excavating circular cross-section tunnels. The tunneling machine for excavating circular cross-section tunnels can be transferred to other construction sites after the excavation is completed to improve the turnover efficiency of the equipment, thereby improving the overall construction efficiency.

[0030] To achieve the above purpose, the technical solution of the tunneling system provided by the present invention is: A tunneling system includes tunneling equipment and also includes a slag cleaning device located behind the tunneling equipment and used to clean up the slag and rocks generated by the corners on both sides of the tunnel excavated by the tunneling equipment. The tunneling equipment includes a supporting vehicle and a tunneling main machine. The tunneling main machine includes a main beam extending forward and backward and a corner excavation device arranged on the main beam and used to excavate the corners on both sides of the tunnel. It also includes a support shoe structure and a supporting structure arranged on the main beam. A propulsion device is arranged between the support shoe structure and the main beam for propelling the main beam forward when the support shoe structure supports the tunnel wall. The support structure is used to support the main beam when the support shoe structure changes steps.

[0031] As a further improvement, the corner excavation device includes two corner excavation cutter discs respectively located on the left and right sides of the main beam and a bottom excavation cutter disc located below the main beam. The bottom excavation cutter disc and the two corner excavation cutter discs are staggered front and back.

[0032] As a further improvement, the rotation center lines of the corner excavation cutter disc and the bottom excavation cutter disc are both horizontal and in the same direction as the left and right directions.

[0033] As a further improvement, the corner excavation device is located behind the support shoe structure and the supporting structure.

[0034] As a further improvement, the supporting structure comprises at least a front supporting leg which is located in front of the support shoe structure and can be telescoped up and down.

[0035] As a further improvement, the supporting structure further comprises a rear supporting leg which is located behind the support shoe structure and can be telescoped up and down.

[0036] As a further improvement, the supporting structure includes front legs and rear legs that can be extended and retracted up and down, and the corner excavation device and the support shoe structure are both located between the front legs and the rear legs.

[0037] As a further improvement, the support shoe structure includes a front support shoe assembly and a rear support shoe assembly, and a fixing member for fixedly connecting the front support shoe assembly and the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly. The front support shoe assembly is located in front of the corner excavation device, and the rear support shoe assembly is located behind the corner excavation device. The rear support shoe assembly includes a base portion installed on the main beam and three Y-shaped support arms arranged on the base portion, two of which are located above the base portion and are used to tighten the arched top wall of the tunnel, and the other support arm is located below the base portion and is used to vertically tighten the bottom wall of the tunnel downward.

[0038] As a further improvement, the support shoe structure comprises a front support shoe assembly and a rear support shoe assembly, and a fastening member for fixedly connecting the front support shoe assembly with the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly.

[0039] As a further improvement, the propulsion device is connected between the front support shoe assembly and a connecting seat arranged on the main beam, and the connecting seat is located in front of the front support shoe assembly.

[0040] As a further improvement, the supporting vehicle is connected in front of the main boring machine.

[0041] As a further improvement, a direction adjustment structure is provided between the front end of the main beam of the tunneling main machine and the supporting vehicle. The direction adjustment structure includes two connecting parts arranged on the left and right. The front end of each connecting part is movably connected to the supporting vehicle, and the rear end is movably connected to the main beam. At least one connecting part is a retractable telescopic connecting part.

[0042] The beneficial effect is that the tunneling system provided by the present invention is a pioneering invention. During the normal tunneling process of the tunneling system, the support shoe structure can be supported on the tunnel wall, and then the propulsion device can be used to push the main beam forward, thereby driving the corner excavation device to dig forward and excavate the corners on both sides of the tunnel; during the step-changing process of the support shoe structure, the support structure provides support for the main beam, and the propulsion device is used to drive the support shoe structure to move forward relative to the main beam. The tunneling main machine has independent support and propulsion power, so it can work independently of the tunneling machine for excavating circular cross-section tunnels, so that it will not restrict each other with the tunneling machine for excavating circular cross-section tunnels. The tunneling machine for excavating circular cross-section tunnels can be transferred to other construction sites after the excavation is completed to improve the turnover efficiency of the equipment, thereby improving the overall construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 A schematic diagram of a tunnel corner excavation area in Example 1 of a tunneling system of the present invention; Figure 2 It is a schematic diagram of the overall structure of the tunneling system in Example 1 of the tunneling system of the present invention; Figure 3 It is a structural schematic diagram of the excavation main machine in Example 1 of the excavation system of the present invention; Figure 4 It is a schematic structural diagram of the corner excavation device in Example 1 of the tunneling system of the present invention; Figure 5 It is a structural schematic diagram of the support shoe structure in Example 1 of the tunneling system of the present invention; Figure 6 It is a structural schematic diagram of a tunneling main machine in Embodiment 5 of the tunneling system of the present invention; Figure 7 It is a structural schematic diagram of the support shoe structure in Example 5 of the tunneling system in the present invention.

[0044] Description of reference numerals: 1. Slag removal equipment; 2. Supporting vehicle; 3. Main beam; 4. Corner excavation cutter disc; 5. Bottom excavation cutter disc; 6. Front support legs; 7. Rear support legs; 8. Front support shoe assembly; 9. Rear support shoe assembly; 10. Base; 11. Support arm; 12. Propulsion device; 13. Connecting seat; 14. Connecting piece; 15. Tunnel. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with embodiments.

[0046] In order to solve the problems in the prior art, the basic concept of the present invention is to excavate the corners on both sides of the tunnel separately after the excavation of the circular cross-section tunnel is completed, so as to avoid the constraints between the excavation work of the circular cross-section tunnel and the excavation work of the corners on both sides of the tunnel, improve the turnover efficiency of the equipment, and then improve the overall construction efficiency.

[0047] Specific embodiment 1 of the tunneling system provided by the present invention: In the present invention, the excavation direction of the excavation system is defined as the front, and the direction in the horizontal plane and perpendicular to the front-rear direction is defined as the left-right direction.

[0048] See attached Figure 2 The excavation system includes an excavation device and a slag removal device 1. After the construction of the circular cross-section tunnel 15 is completed, the excavation system enters the tunnel 15 and uses the excavation device to perform secondary excavation of the tunnel 15, thereby removing the corners of the tunnel 15 so that the tunnel 15 is in the shape of a city gate. The slag removal device 1 follows the excavation device and promptly cleans the slag produced by the excavation of the excavation device. The slag removal device 1 can perform slag removal work independently of the excavation device. The slag removal device 1 is a slag scraper, which is a prior art and will not be described in detail.

[0049] The tunneling equipment includes a tunneling main machine and a supporting vehicle 2. The supporting vehicle 2 includes a vehicle body and running wheels arranged under the vehicle body. The running wheels are arranged in an eight-shaped shape so that they can travel in a circular-section tunnel 15 without tracks. Various equipment such as hydraulic equipment, fluid storage equipment and electrical equipment are placed above the vehicle body of the supporting vehicle 2 to provide supporting services for the tunneling main machine.

[0050] See attached Figure 3 The tunneling machine includes a main beam 3 extending forward and backward, and also includes a corner excavation device, a support shoe structure and a support structure arranged on the main beam 3. The corner excavation device is used to excavate the corners on both sides of the tunnel 15; a propulsion device 12 is arranged between the support shoe structure and the main beam 3, and the propulsion device 12 can push the main beam 3 forward when the support shoe structure supports the tunnel 15 wall; the support structure is used to support the main beam 3 when the support shoe structure changes steps.

[0051] The corner excavation device is located behind the shoe structure and the supporting structure to prevent the corner excavation device from excavating the corners of the tunnel 15 and the resulting slag from affecting the normal operation of the shoe structure and the supporting structure. Figure 4 The corner excavation device includes two corner excavation cutter discs 4 and a bottom excavation cutter disc 5. Both the corner excavation cutter discs 4 and the bottom excavation cutter disc 5 are wheel cutter discs, and their rotation axes are both horizontal and in the same direction as the left and right directions. The two corner excavation cutter discs 4 are respectively located on the left and right sides of the main beam 3 and are coaxially arranged. The diameter of the bottom excavation cutter disc 5 is smaller than that of the corner excavation cutter disc 4. The bottom excavation cutter disc 5 is located below the main beam 3, and the bottom excavation cutter disc 5 and the corner excavation cutter disc 4 are staggered in the front-back direction.

[0052] The two corner excavation cutter discs 4 are used to excavate the corners on both sides of the tunnel 15. Figure 1 The A area in the tunnel 15 is formed so that the two side walls of the tunnel 15 form straight walls, and the two side parts of the bottom wall of the tunnel 15 are planes; the bottom excavation cutter head 5 is used to excavate the area between the two corner excavation cutter heads 4, that is, the adjacent Figure 1 The B area in the tunnel 15 is used to make the bottom wall of the tunnel 15 have better flatness. Since the area excavated by the bottom excavation cutter head 5 is small and the area below the main beam 3 is limited, the bottom excavation cutter head 5 uses a small diameter cutter head.

[0053] In one implementation of this embodiment, the bottom excavation cutter disc 5 is arranged behind the two corner excavation cutter discs 4 to reduce the workload of the bottom excavation cutter disc 5 and ensure that the excavation speed of the small-diameter bottom excavation cutter disc 5 can match that of the corner excavation cutter disc 4. In the case where the excavation speeds can match, the bottom excavation cutter disc 5 can also be arranged in front of the corner excavation cutter disc 4.

[0054] The bottom excavation cutter disc 5 and the corner excavation cutter disc 4 are staggered in the front-to-back direction to ensure that there is no blind area for excavation of the bottom excavation cutter disc 5 and the corner excavation cutter disc 4, and to facilitate the arrangement and installation of the bottom excavation cutter disc 5 and the corner excavation cutter disc 4 to avoid interference.

[0055] See attached Figure 3 Combined with the attached Figure 5The supporting structure includes a front leg 6 and a rear leg 7, both of which can be extended and retracted up and down. The retractable structure is a prior art and will not be described in detail. The front leg 6 is located in front of the support shoe structure, and the rear leg 7 is located behind the support shoe structure. During normal excavation, the lower ends of the front leg 6 and the rear leg 7 are lifted upward to facilitate the advancement of the main beam 3 and the corner excavation device; during the step-changing process, the lower ends of the front leg 6 and the rear leg 7 extend downward and are tightened on the bottom of the tunnel 15 wall where corner excavation is not performed. The front leg 6 and the rear leg 7 support the main beam 3 and the support shoe structure on the main beam 3 in front of and behind the support shoe structure, respectively, to ensure stability during the step-changing process.

[0056] The shoe support structure includes a front shoe support assembly 8, a rear shoe support assembly 9, and a fastening member fixedly connected between the front shoe support assembly 8 and the rear shoe support assembly 9. The front shoe support assembly 8 and the rear shoe support assembly 9 are connected as a whole so that they can move forward and backward relative to the main beam 3 at the same time. The front shoe support assembly 8 and the rear shoe support assembly 9 have basically the same structure, and both include a base portion 10 installed on the main beam 3 and capable of sliding forward and backward relative to the main beam 3, and four support arms 11 arranged on the base portion 10, and the four support arms 11 are arranged in an X shape, thereby providing stable and reliable support for the main beam 3.

[0057] The propulsion device 12 is specifically a propulsion cylinder. The cylinder body of the propulsion device 12 is connected to the front support shoe assembly 8. The piston rod end of the propulsion device 12 is connected to the connecting seat 13 on the main beam 3 located in front of the front support shoe assembly 8. The propulsion device 12 is provided with two and is respectively located on the left and right sides of the main beam 3 to provide a stable propulsion force to the main beam 3.

[0058] During normal excavation, the front support shoe assembly 8 and the rear support shoe assembly 9 simultaneously hold the cave wall tightly, and use the propulsion device 12 to push the main beam 3 forward, thereby driving the corner excavation device to excavate forward; during the step change process, the support arms 11 of the front support shoe assembly 8 and the rear support shoe assembly 9 are both retracted, and the front support shoe assembly 8 and the rear support shoe assembly 9 are pulled forward by the propulsion device 12. The front support shoe assembly 8 and the rear support shoe assembly 9 simultaneously hold the cave wall tightly, which can improve the support stability during the propulsion process. The front support shoe assembly 8 and the rear support shoe assembly 9 have a certain span in front and back, and their combined use can achieve the support effect of a support shoe assembly with a larger front and rear width.

[0059] A direction adjustment structure is arranged between the front end of the main beam 3 of the tunneling main machine and the supporting vehicle 2. The direction adjustment structure includes two connecting parts 14 arranged on the left and right. The front end of each connecting part 14 is movably connected to the supporting vehicle 2, and the rear end is movably connected to the main beam 3. At least one connecting part 14 is a retractable telescopic connecting part 14.

[0060] In one implementation of this embodiment, both connecting members 14 are directional oil cylinders. When the lengths of the two directional oil cylinders are different, the supporting vehicle 2 and the main machine for tunneling can be controlled to form a certain angle in the horizontal plane to facilitate steering. In other implementations, one connecting member 14 is a directional oil cylinder and the other connecting member 14 is a fixed-length connecting rod. The directional oil cylinder is extended or shortened to make its length different from the length of the connecting rod, and the supporting vehicle 2 and the main machine for tunneling can also be controlled to form a certain angle in the horizontal plane to facilitate steering.

[0061] The initial cross-section of tunnel 15 is circular, and after the secondary excavation of the tunneling system, the cross-section of tunnel 15 is in the shape of a city gate. The circular tunnel 15 is constructed by a conventional tunnel boring machine. After the construction is completed, the conventional tunnel boring machine is withdrawn and can be transferred to other construction sites for continued construction. After the circular tunnel is excavated, the pipelines and temporary tracks in the tunnel are removed, and then the tunneling system performs secondary excavation operations near the site.

[0062] Compared with the existing technology, the construction of this tunneling system and conventional tunneling machines does not affect each other, so both can complete their own tunneling tasks without constraints, thereby ensuring high overall construction efficiency. Secondly, when the tunneling system is constructed, the pipelines and temporary tracks in the tunnel have been removed, so the working space is larger and the construction is more convenient. It can also cover the entire range of the bottom of the tunnel without leaving blind areas for excavation, ensuring the flatness of the bottom of the tunnel. Finally, since there are no other structures behind the main tunneling machine in the tunneling system, it is relatively convenient to arrange slag cleaning equipment to improve the slag cleaning effect and efficiency.

[0063] During the construction process, the supporting vehicle moves forward in front of the main boring machine and is driven by the main boring machine. The supporting vehicle uses the running wheels to move directly in the circular tunnel. The circular tunnel has a natural guiding effect on the supporting vehicle. In addition, there is a steering structure to control the relative posture of the supporting vehicle and the main boring machine, so that the supporting vehicle can move smoothly. The present invention sets the supporting vehicle in front of the main boring machine to ensure that it can move forward smoothly without being affected by slag, and the slag generated by the main boring machine excavating the tunnel corners can be cleaned up and transported out of the tunnel in time by the slag cleaning equipment.

[0064] Specific embodiment 2 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the corner excavation device in this embodiment only includes a corner excavation cutter disc, and no bottom excavation cutter disc is provided, so that the final tunnel shape is the same as the final shape of the tunnel in the Chinese invention patent with application publication number CN114562283A.

[0065] Specific embodiment 3 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the rotation center lines of the corner excavation cutter disc and the bottom excavation cutter disc in this embodiment are in a vertical state, and their arrangement form refers to the arrangement form of the wheel cutter disc in the application publication number CN114575867A.

[0066] Specific embodiment 4 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, no rear support legs are provided, but only front support legs are provided. During the step-changing process of the support shoe structure, the front support legs provide support in front of the support shoe structure, and the rear of the support shoe mechanism is supported by the corner excavation device.

[0067] Specific embodiment 5 of the tunneling system provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 6 In this embodiment, the corner excavation device and the support shoe structure are both located between the front support leg 6 and the rear support leg 7, and the corner excavation device is located between the front support shoe assembly 8 and the rear support shoe assembly 9.

[0068] The arrangement in this embodiment can make the force on the main beam 3 more balanced, thereby improving the stability during the construction process, and can also reduce the pressure of the corner excavation cutter disc 4 and the bottom excavation cutter disc 5 on the cutting tools thereon under the action of gravity.

[0069] In this embodiment, the front support shoe assembly 8 and the rear support shoe assembly 9 are still fixedly connected by a fastening member and move forward and backward synchronously. However, since the gate-shaped tunnel 15 at the location of the rear support shoe assembly 9 has been formed, in order to adapt to the shape of the tunnel 15, see the attached Figure 7 The front support shoe assembly 8 and the rear support shoe assembly 9 are provided with three support arms 11 on their base 10, wherein two support arms 11 are located above the base 10 and are used to support the arched top wall of the tunnel 15, and the other support arm 11 is located below the base 10 and is used to vertically support the bottom wall of the tunnel 15 downwards, and the three support arms 11 are arranged in a Y shape.

[0070] In other implementations of this embodiment, only the support arms 11 of the rear shoe assembly 9 may be arranged in a Y shape, while the support arms 11 of the front shoe assembly 8 may be arranged in an X shape.

[0071] Specific embodiment 6 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the corner excavation device and the support shoe structure are both located between the front legs and the rear legs, but the corner excavation device is still located behind the support shoe structure.

[0072] Specific embodiment 7 of the tunneling system provided by the present invention: This embodiment is based on the embodiment 1, and the difference from the embodiment 1 is that the support shoe structure in this embodiment only includes one set of support shoe components, and the rest of the structure is the same as that in the embodiment 1, which will not be described in detail.

[0073] Specific embodiment 8 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the cylinder body of the propulsion device in this embodiment is arranged on the rear support shoe assembly, and the piston rod end thereof is connected to a connecting seat arranged on the main beam and located behind the rear support shoe assembly.

[0074] Specific embodiment 9 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that no steering structure is provided in this embodiment, and the rear end of the supporting vehicle is directly hinged to the front end of the main beam. Since the bottom of the circular tunnel is an inverted arch, and the supporting vehicle is provided with running wheels arranged in an eight-shaped shape, the circular tunnel naturally guides the supporting vehicle, and enables the supporting vehicle to turn automatically following the direction of the tunnel.

[0075] Specific embodiment 10 of the tunneling system provided by the present invention: This embodiment is based on the embodiment 1, and the difference from the embodiment 1 is that the embodiment does not have a direction adjustment structure, and the rear end of the supporting vehicle is directly fixedly connected to the front end of the main beam. The tunneling system in this embodiment is suitable for tunnels with a straight direction and no turns.

[0076] Specific embodiment 11 of the tunneling system provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that no fastening member is provided in this embodiment, and the rear support shoe assembly is fixedly connected to the main beam.

[0077] During normal excavation, the rear support shoe assembly does not hold the tunnel wall tightly, while the front support shoe assembly holds the tunnel wall tightly and uses the propulsion device to push the main beam forward, and the rear support shoe assembly moves forward with the main beam; during step changing, the rear support shoe assembly holds the tunnel wall tightly, while the front support shoe assembly does not hold the tunnel wall tightly, and uses the propulsion device to pull the front support shoe assembly forward.

[0078] The rear support shoe assembly in this embodiment actually only plays a role of supporting the main beam during the step-changing process, so there is no need to set up rear support legs.

[0079] Specific embodiment 12 of the tunneling system provided by the present invention: This embodiment is based on the embodiment 1, and the difference from the embodiment 1 is that the corner excavation device in this embodiment can also be arranged in front of the support structure and the shoe structure, and the shoe structure is located between the front legs and the rear legs. The support arms of the front shoe assembly and the rear shoe assembly in the shoe structure in this embodiment are arranged in a Y shape as in the embodiment 5.

[0080] Specific embodiment 13 of the tunneling system provided by the present invention: This embodiment is based on the first embodiment, and the difference from the first embodiment is that the supporting vehicle in this embodiment is connected to the rear of the main tunneling machine. Since there are slag stones in the tunnel behind the main tunneling machine, in order to ensure that the supporting vehicle has good passability on the slag stones, the running wheels on the supporting vehicle can be replaced with running tracks. However, if the slag stones are thin and do not affect the normal passage of the supporting vehicle, the supporting vehicle can still be equipped with running wheels.

[0081] Specific embodiments of the tunneling equipment provided by the present invention: The excavation equipment is the excavation equipment in the specific embodiment of the excavation system mentioned above, and will not be described in detail.

[0082] The specific embodiment of the tunneling host provided by the present invention is as follows: The tunneling host is the tunneling host in the specific embodiment of the tunneling system mentioned above, and will not be described in detail.

[0083] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A boring machine, characterized in that: It includes a main beam extending forward and backward and a corner excavation device arranged on the main beam and used for excavating the corners on both sides of the tunnel. It also includes a support shoe structure and a support structure arranged on the main beam. A propulsion device is arranged between the support shoe structure and the main beam to propel the main beam forward when the support shoe structure holds the tunnel wall tightly. The support structure is used to support the main beam when the support shoe structure changes steps.

2. The boring machine according to claim 1 is characterized in that: The corner excavation device comprises two corner excavation cutter discs respectively located on the left and right sides of the main beam and a bottom excavation cutter disc located below the main beam. The bottom excavation cutter disc and the two corner excavation cutter discs are staggered in front and back arrangement.

3. The boring machine according to claim 2 is characterized in that: The rotation center lines of the corner excavation cutter disc and the bottom excavation cutter disc are both horizontal and in the same direction as the left and right directions.

4. The boring machine according to any one of claims 1 to 3, characterized in that: The corner excavator is located behind the gripper structure and the supporting structure.

5. The boring machine according to claim 4 is characterized in that: The supporting structure at least comprises a front supporting leg which is located in front of the support shoe structure and can be telescoped up and down.

6. The boring machine according to claim 5 is characterized in that: The supporting structure also includes a rear support leg located behind the support shoe structure and capable of being telescopically moved up and down.

7. The boring machine according to any one of claims 1 to 3, characterized in that: The supporting structure comprises a front supporting leg and a rear supporting leg which can be extended and retracted up and down, and the corner excavation device and the support shoe structure are both located between the front supporting leg and the rear supporting leg.

8. The boring machine according to claim 7 is characterized in that: The support shoe structure includes a front support shoe assembly and a rear support shoe assembly, and a fixing part for fixedly connecting the front support shoe assembly and the rear support shoe assembly is arranged between the front support shoe assembly and the rear support shoe assembly. The front support shoe assembly is located in front of the corner excavation device, and the rear support shoe assembly is located behind the corner excavation device. The rear support shoe assembly includes a base portion installed on the main beam and three Y-shaped support arms arranged on the base portion, two of which are located above the base portion and are used to tighten the arched top wall of the tunnel, and the other support arm is located below the base portion and is used to vertically tighten the bottom wall of the tunnel downward.

9. The boring machine according to any one of claims 1 to 3, characterized in that: The shoe support structure comprises a front shoe support assembly and a rear shoe support assembly, and a fastening member for fixedly connecting the front shoe support assembly with the rear shoe support assembly is arranged between the front shoe support assembly and the rear shoe support assembly.

10. The boring machine according to claim 9, characterized in that: The propulsion device is connected between the front support shoe assembly and a connection seat arranged on the main beam, and the connection seat is located in front of the front support shoe assembly.

11. A tunneling device, characterized in that: It comprises a supporting vehicle and a tunneling main machine as described in any one of claims 1-10.

12. The excavation equipment according to claim 11, characterized in that: The supporting vehicle is connected in front of the main boring machine.

13. The excavation equipment according to claim 11 or 12, characterized in that: A direction-adjusting structure is arranged between the front end of the main beam of the tunneling main machine and the supporting vehicle. The direction-adjusting structure includes two connecting parts arranged on the left and right. The front end of each connecting part is movably connected to the supporting vehicle, and the rear end is movably connected to the main beam. At least one connecting part is a retractable telescopic connecting part.

14. A tunneling system, characterized in that: It comprises the tunneling equipment as described in any one of claims 11 to 13, and also comprises a slag cleaning device located behind the tunneling equipment and used for cleaning the slag and rocks generated by the corners on both sides of the tunnel excavated by the tunneling equipment.

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