Rear support of open-type TBM (Tunnel Boring Machine) and open-type TBM

Abstract

The invention provides a rear support of an open-type TBM and the open-type TBM, and belongs to the field of tunneling equipment. The rear support of the open TBM comprises an adjusting frame, a connecting seat and a vertical direction adjusting device connected between the adjusting frame and the connecting seat, and further comprises an auxiliary seat, a first adjusting structure is arranged between the connecting seat and the adjusting frame, and a second adjusting structure is arranged between the auxiliary seat and the adjusting frame. The open-type TBM comprises a rear support or a main beam or an inner armour. The pitching angle of the adjusting frame is adjusted when the tunneling gradient is changed, so that it is guaranteed that the acting force of the vertical direction adjusting device on the main beam or the inner yoke is perpendicular to the main beam or the inner yoke, and the tangential stress at the joint of the connecting base and the main beam or the inner yoke is reduced.

Description

Technical Field

[0001] The invention belongs to the field of tunnel boring equipment, and in particular relates to a rear support of an open TBM and an open TBM. Background Art

[0002] The rear support is part of the open TBM main machine. As a key component of the propulsion support system, the TBM rear support plays a role in supporting the TBM main machine during the main machine step change process.

[0003] In order to adapt to the turning of TBM, the existing rear support is equipped with a steering structure. For example, the Chinese utility model patent application with the authorization announcement number CN202788865U discloses a single-support open-type full-section tunnel hard rock tunnel boring machine, which includes a tunneling body, a support shoe mechanism, a main beam, a propulsion cylinder and a rear support mechanism. The rear support mechanism includes an adjustment frame and a horizontal steering cylinder (horizontal steering device) and a vertical steering cylinder (vertical steering device) arranged between the adjustment frame and the main beam. The left and right sides of the adjustment frame are also inclined with support cylinders, and shoe plates are installed on the support cylinders. During the turning process of the tunnel boring machine, the horizontal steering cylinder and the vertical steering cylinder can timely adjust the relative position of the adjustment frame and the main beam, so that the entire rear support mechanism can stably support the main beam during the turning process of the tunnel boring machine.

[0004] As the application areas of hard rock tunnel boring machines continue to expand, open-type TBMs also need to face working conditions with large fluctuations in the slope of the tunnel, such as pumped storage projects and mining projects. In these projects, if the slope of the tunnel needs to change, the vertical adjustment cylinder is required to lift or lower the tail end of the main beam, thereby tilting the head of the tunnel boring machine upward or downward to achieve a turn in the vertical plane. Therefore, when the slope of the tunnel changes, the tail end of the main beam will pitch and swing in the vertical plane, but at this time the rear support is tightly supported on the tunnel wall and cannot pitch and swing with the main beam. Therefore, the vertical adjustment cylinder will be in a non-perpendicular state with the main beam, and the force of the vertical adjustment cylinder on the main beam will produce a component force perpendicular to the main beam and a component force parallel to the main beam. The component of force perpendicular to the main beam is used to support the main beam and adjust the swing of the rear end of the main beam, but the component of force parallel to the main beam will act on the connecting seat on the main beam used to connect to the vertical adjustment cylinder, and the greater the pitch swing angle of the main beam, the greater the component of force parallel to the main beam received by the connecting seat. The component of force parallel to the main beam is a tangential force for the connecting seat, which will cause greater shear stress at the connection position between the connecting seat and the main beam, thereby increasing the risk of fracture between the connecting seat and the main beam. Summary of the invention

[0005] The purpose of the present invention is to provide a rear support for an open TBM to solve the technical problem in the prior art that when the slope of the tunnel changes significantly, the vertical adjustment device is prone to generate a large component force parallel to the main beam or the inner frame, thereby affecting the firmness of the connecting seat.

[0006] Another object of the present invention is to provide an open TBM to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the technical solution of the rear support of the open TBM provided by the present invention is: A rear support for an open-type TBM comprises an adjustment frame, a connecting seat and a vertical direction adjustment device connected between the adjustment frame and the connecting seat, and also comprises an auxiliary seat, a first adjustment structure is arranged between the connecting seat and the adjustment frame, and a second adjustment structure is arranged between the auxiliary seat and the adjustment frame, one of the first adjustment structure and the second adjustment structure is used to drive the corresponding part of the adjustment frame to move forward and backward, and the other is used to keep the corresponding part of the adjustment frame in place, or the first adjustment structure and the second adjustment structure are respectively used to drive the corresponding part of the adjustment frame to move in the reverse direction in the forward and backward directions, so as to make the adjustment frame pitch and rotate.

[0008] As a further improvement, the first adjustment structure and the second adjustment structure are both telescopic drive devices, the telescopic drive devices are movably connected to the adjustment frame, and the telescopic drive devices are movably connected to the connecting seat or the auxiliary seat.

[0009] As a further improvement, one of the first adjustment structure and the second adjustment structure is a telescopic drive device, and the other is a fixed-length auxiliary part. The telescopic drive device and the auxiliary part are movably connected to the adjustment frame, and the telescopic drive device and the auxiliary part are movably connected to the connecting seat or the auxiliary seat.

[0010] As a further improvement, the connecting seat is used to be installed on the upper side of the main beam or the inner shell, and the auxiliary seat is used to be installed on the lower side of the main beam or the inner shell.

[0011] As a further improvement, the first adjustment structure and the second adjustment structure are arranged in pairs, and the two first adjustment structures of the same pair are respectively located in front and behind the connecting seat or the adjustment frame, and the two second adjustment structures of the same pair are respectively located in front and behind the auxiliary seat or the adjustment frame.

[0012] As a further improvement, the first adjustment structure and the second adjustment structure are arranged in pairs, the two first adjustment structures of the same pair are respectively located in the front and rear of the adjustment frame, the two second adjustment structures of the same pair are respectively located in the front and rear of the adjustment frame, the connecting seat and the auxiliary seat are also arranged in pairs and the two connecting seats of the same pair are respectively located in the front and rear of the adjustment frame, and the two auxiliary seats of the same pair are respectively located in the front and rear of the adjustment frame.

[0013] As a further improvement, the first adjustment structure and the second adjustment structure are arranged in pairs, the two first adjustment structures of the same pair are respectively located in front of and behind the adjustment frame, the two second adjustment structures of the same pair are respectively located in front of and behind the auxiliary seat, the connecting seats are arranged in pairs and the two connecting seats of the same pair are respectively located in front of and behind the adjustment frame, the adjustment frame includes connecting parts arranged in pairs for connecting to the second adjustment structures, and the two connecting parts of the same pair are respectively located in front of and behind the auxiliary seat.

[0014] As a further improvement, a support leg is provided on the adjustment frame, the end of the support leg is connected to a boot plate for tightening to the hole wall, the support leg includes two supporting telescopic devices arranged in the front and rear directions, and the two ends of the two supporting telescopic devices are respectively movably connected to the adjustment frame and the boot plate.

[0015] As a further improvement, the vertical direction adjustment device is connected to the connecting seat and / or the adjusting frame via a ball joint structure.

[0016] The beneficial effect is that the rear support of the open TBM provided by the present invention is an improvement on the prior art. The rear support of the open TBM adjusts the pitch angle of the adjustment frame by setting the first adjustment structure and the second adjustment structure, and then when the vertical adjustment device is used to lift or sink the tail of the main beam or the inner shell, the pitch angle of the adjustment frame can be adjusted so that the force applied by the vertical adjustment device to the main beam or the inner shell can be close to or maintained vertical to the length direction of the main beam or the inner shell, thereby reducing the generation of the component force parallel to the main beam or the inner shell, thereby reducing the tangential stress at the connection position between the connecting seat and the main beam or the inner shell, and ensuring the firmness and reliability of the connecting seat.

[0017] To achieve the above-mentioned purpose, the technical solution of the open TBM provided by the present invention is: An open TBM comprises a rear support and a main beam or an inner beam, wherein the rear support comprises an adjustment frame, a connecting seat and a vertical direction adjustment device connected between the adjustment frame and the connecting seat, and further comprises an auxiliary seat, wherein a first adjustment structure is arranged between the connecting seat and the adjustment frame, and a second adjustment structure is arranged between the auxiliary seat and the adjustment frame, wherein one of the first adjustment structure and the second adjustment structure is used to drive the corresponding part of the adjustment frame to move forward and backward, and the other is used to keep the corresponding part of the adjustment frame in place, or the first adjustment structure and the second adjustment structure are respectively used to drive the corresponding part of the adjustment frame to move in the reverse direction in the forward and backward directions so as to make the adjustment frame pitch and rotate.

[0018] As a further improvement, the first adjustment structure and the second adjustment structure are both telescopic drive devices, the telescopic drive devices are movably connected to the adjustment frame, and the telescopic drive devices are movably connected to the connecting seat or the auxiliary seat.

[0019] As a further improvement, one of the first adjustment structure and the second adjustment structure is a telescopic drive device, and the other is a fixed-length auxiliary part. The telescopic drive device and the auxiliary part are movably connected to the adjustment frame, and the telescopic drive device and the auxiliary part are movably connected to the connecting seat or the auxiliary seat.

[0020] As a further improvement, the connecting seat is used to be installed on the upper side of the main beam or the inner shell, and the auxiliary seat is used to be installed on the lower side of the main beam or the inner shell.

[0021] As a further improvement, the first adjustment structure and the second adjustment structure are arranged in pairs, and the two first adjustment structures of the same pair are respectively located in front and behind the connecting seat or the adjustment frame, and the two second adjustment structures of the same pair are respectively located in front and behind the auxiliary seat or the adjustment frame.

[0022] As a further improvement, the first adjustment structure and the second adjustment structure are arranged in pairs, the two first adjustment structures of the same pair are respectively located in the front and rear of the adjustment frame, the two second adjustment structures of the same pair are respectively located in the front and rear of the adjustment frame, the connecting seat and the auxiliary seat are also arranged in pairs and the two connecting seats of the same pair are respectively located in the front and rear of the adjustment frame, and the two auxiliary seats of the same pair are respectively located in the front and rear of the adjustment frame.

[0023] As a further improvement, the first adjustment structure and the second adjustment structure are arranged in pairs, the two first adjustment structures of the same pair are respectively located in front of and behind the adjustment frame, the two second adjustment structures of the same pair are respectively located in front of and behind the auxiliary seat, the connecting seats are arranged in pairs and the two connecting seats of the same pair are respectively located in front of and behind the adjustment frame, the adjustment frame includes connecting parts arranged in pairs for connecting to the second adjustment structures, and the two connecting parts of the same pair are respectively located in front of and behind the auxiliary seat.

[0024] As a further improvement, a support leg is provided on the adjustment frame, the end of the support leg is connected to a boot plate for tightening to the hole wall, the support leg includes two supporting telescopic devices arranged in the front and rear directions, and the two ends of the two supporting telescopic devices are respectively movably connected to the adjustment frame and the boot plate.

[0025] As a further improvement, the vertical direction adjustment device is connected to the connecting seat and / or the adjusting frame via a ball joint structure.

[0026] The beneficial effect is that the open TBM provided by the present invention is an improvement on the prior art. The rear support in the open TBM adjusts the pitch angle of the adjustment frame by setting the first adjustment structure and the second adjustment structure, and then when the vertical adjustment device is used to lift or sink the main beam or the tail of the inner shell, the pitch angle of the adjustment frame can be adjusted so that the force applied by the vertical adjustment device to the main beam or the inner shell can be close to or maintained vertical to the length direction of the main beam or the inner shell, thereby reducing the generation of the component force parallel to the main beam or the inner shell, thereby reducing the tangential stress at the connection position between the connecting seat and the main beam or the inner shell, and ensuring the firmness and reliability of the connecting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of Example 1 of an open TBM in the present invention; Figure 2 It is a side view of Example 1 of the open TBM of the present invention; Figure 3 is a cross-sectional view of Example 1 of the open TBM of the present invention; Figure 4 This is a state diagram of the rear support tightening the tunnel wall in Example 1 of the open TBM of the present invention; Figure 5 It is a state diagram of horizontal adjustment of Example 1 of the open TBM in the present invention; Figure 6 It is a schematic diagram of a non-vertical state between the vertical direction adjustment device and the main beam of Example 1 of the open TBM of the present invention; Figure 7 It is a cross-sectional view of Example 4 of the open TBM in the present invention.

[0028] Description of reference numerals: 1. Main beam; 2. Support telescopic device; 3. Boot plate; 4. Upper frame; 5. Crossbeam; 6. Connecting seat; 7. Auxiliary seat; 8. First adjustment structure; 9. Second adjustment structure; 10. Vertical adjustment device; 11. Horizontal adjustment device. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with embodiments.

[0030] Specific embodiment 1 of the open TBM provided by the present invention: The open TBM includes a tunneling part, a main beam 1 connected to the tunneling part, and a rear support installed at the rear end of the main beam 1. The present invention takes the tunneling direction of the open TBM as the front, so the length direction of the main beam 1 is the same as the front-rear direction when tunneling in a straight tunnel.

[0031] See attached Figure 1 and attached Figure 2and attached Figure 4 The rear support includes an adjustment frame, which is a frame-shaped structure as a whole. When in use, the adjustment frame is mounted on the main beam 1, and a gap is maintained between the inner side and the main beam 1. Support legs are obliquely arranged at the lower positions on the left and right sides of the adjustment frame, and the ends of the support legs are connected to the boot plates 3. Specifically, each support leg includes two support telescopic devices 2 arranged front and back, and the two ends of the support telescopic devices 2 are movably connected to the adjustment frame and the boot plates 3 respectively. When the two support telescopic devices 2 are extended or shortened synchronously, the extension or shortening of the support legs can be achieved. When the two support telescopic devices 2 are not extended or shortened synchronously, the boot plates 3 will swing, and the swing axis of the boot plates 3 is perpendicular to the central axis of the tunnel. In this way, even if the support legs are not perpendicular to the tunnel wall of the tunnel, the boot plates 3 can be tightly attached to the tunnel wall.

[0032] The adjustment frame includes an upper frame body 4 and a lower frame body, the upper frame body 4 is an inverted U-shaped structure, and the lower frame body includes two cross beams 5, both of which are connected between the lower ends of the left and right arms of the upper frame body 4, and the two cross beams 5 are arranged at intervals in the front-to-back direction. At the same time, the two cross beams 5 also constitute a connecting portion arranged in pairs.

[0033] Combined with Figure 3 , the rear support also includes a connecting seat 6 and an auxiliary seat 7, the connecting seat 6 is fixedly mounted on the upper side of the main beam 1, and the auxiliary seat 7 is fixedly mounted on the lower side of the main beam 1. There are two pairs of connecting seats 6, and the two connecting seats 6 pairs are arranged at intervals in the left-right direction. The two connecting seats 6 in each pair of connecting seats 6 are arranged at intervals in the front-to-back direction, and one of them is in front of the upper frame 4 and the other is in the rear of the upper frame 4. There is one auxiliary seat 7, and the auxiliary seat 7 is located between the two crossbeams 5 of the adjustment frame, and the distance between the auxiliary seat 7 and the two connecting seats 6 in the same pair of connecting seats 6 in the front-to-back direction is equal.

[0034] A first adjustment structure 8 is provided between the connecting seat 6 and the adjustment frame, and a second adjustment structure 9 is provided between the auxiliary seat 7 and the adjustment frame. One of the first adjustment structure 8 and the second adjustment structure 9 is used to drive the corresponding part of the adjustment frame to move forward or backward, and the other is used to keep the corresponding part of the adjustment frame in place, or the first adjustment structure 8 and the second adjustment structure 9 are respectively used to drive the corresponding part of the adjustment frame to move in the reverse direction in the front and rear directions.

[0035] In this embodiment, the first adjustment structure 8 and the second adjustment structure 9 are both telescopic drive devices. The telescopic drive devices are arranged in pairs, and the two telescopic drive devices in the same pair are arranged at intervals in the front-to-back direction. There are two pairs of telescopic drive devices constituting the first adjustment structure 8, and there are also two pairs of telescopic drive devices constituting the second adjustment structure 9.

[0036] The telescopic drive devices constituting the first adjustment structure 8 are installed on the connecting seat 6 through a joint bearing, and each connecting seat 6 corresponds to a telescopic drive device. The telescopic ends of the telescopic drive devices constituting the first adjustment structure 8 are all facing the upper frame body 4 of the adjustment frame, and are connected to the upper frame body 4 of the adjustment frame through a ball joint structure. The telescopic drive devices constituting the first adjustment structure 8 are all installed at the same height. Among the telescopic drive devices constituting the first adjustment structure 8, when the telescopic drive device located in front of the upper frame body 4 of the adjustment frame is extended, the telescopic drive device located behind the upper frame body 4 of the adjustment frame is shortened accordingly, so that the corresponding part of the upper frame body 4 of the adjustment frame moves backward. The corresponding part of the upper frame body 4 of the adjustment frame moves forward, which requires the telescopic drive device in front of it to shorten and the telescopic drive device in the rear to extend.

[0037] The telescopic drive device constituting the second adjustment structure 9 is installed on the crossbeam 5 through a joint bearing. Two telescopic drive devices are arranged on each crossbeam 5 at intervals in the left-right direction. The two telescopic drive devices of the same pair are respectively located on the two crossbeams 5 and correspond to each other in the front-back direction. The telescopic end of the telescopic drive device constituting the second adjustment structure 9 is connected to the auxiliary seat 7 through a ball joint structure. The telescopic drive device constituting the second adjustment structure 9 can control the front-back movement of the crossbeam 5 of the adjustment frame. The control method thereof refers to the front-back movement of the upper frame body 4 of the adjustment frame, and will not be described in detail here.

[0038] In one embodiment, only the first adjustment structure 8 is used to control the forward and backward movement of the upper frame 4 of the adjustment frame, while the second adjustment structure 9 maintains a fixed length so that the forward and backward position of the crossbeam 5 of the adjustment frame remains unchanged, so that the overall pitch and roll swing of the adjustment frame can be achieved.

[0039] In another embodiment, only the second adjustment structure 9 is used to control the forward and backward movement of the crossbeam 5 of the adjustment frame, while the first adjustment structure 8 maintains a fixed length, so that the forward and backward position of the corresponding part of the upper frame body 4 of the adjustment frame remains unchanged, which can also realize the pitch and roll swing of the entire adjustment frame.

[0040] When the adjustment frame needs to have a larger pitch swing amplitude, the upper part of the upper frame body 4 of the adjustment frame and the crossbeam 5 of the adjustment frame move in opposite directions in the front-rear direction. At this time, the first adjustment structure 8 and the second adjustment structure 9 are both used to control the posture of the adjustment frame.

[0041] The rear support also includes a vertical adjustment device 10 and a horizontal adjustment device 11, which are arranged in pairs, and two pairs of vertical adjustment devices 10 are arranged, and the two pairs of vertical adjustment devices 10 are respectively located on the left and right sides of the adjustment frame, the two vertical adjustment devices 10 in the pair of vertical adjustment devices 10 are respectively located at the front and rear of the adjustment frame, and the horizontal adjustment device 11 is respectively located at the front and rear of the adjustment frame.

[0042] One end of the horizontal direction adjustment device 11 is movably connected to the adjustment frame, and the other end is movably connected to one of the connecting seats 6. The lower end of the vertical direction adjustment device 10 is installed on the adjustment frame, and the upper end thereof is movably connected to the corresponding connecting seat 6. In this embodiment, the vertical direction adjustment device 10 and the horizontal direction adjustment device 11 are connected to the adjustment frame and the connecting seat 6 through a ball joint structure to achieve a larger angle of deflection.

[0043] During the process of excavating a straight tunnel, the main beam 1 is always perpendicular to the vertical adjustment device 10, and the direction of the force applied by the vertical adjustment device 10 to the main beam 1 is perpendicular to the main beam 1, so the connection position between the connecting seat 6 and the main beam 1 is subject to tensile stress.

[0044] When the excavation slope needs to be changed during the excavation process, the vertical direction adjustment device 10 can lift the main beam 1 upward or sink the main beam 1. Figure 6 During this process, the tail of the main beam 1 will no longer be perpendicular to the vertical adjustment device 10, and the force exerted by the vertical adjustment device 10 on the main beam 1 will have a component parallel to the main beam 1. At the same time, the connection position between the connecting seat 6 and the main beam 1 begins to bear tangential stress.

[0045] The adjustment frame can achieve pitch swing with the cooperation of the first adjustment structure 8 and the second adjustment structure 9. Therefore, when the tail of the main beam 1 begins to pitch, the adjustment frame can simultaneously adjust the pitch angle relative to the main beam 1. After the adjustment is completed, when the tail of the main beam 1 is lifted to the highest position or sunk to the lowest position, the tail of the main beam 1 is at the maximum pitch swing angle during this adjustment process. However, since the adjustment frame is also continuously adjusted during this process, the vertical adjustment device 10 remains perpendicular to the main beam 1, thereby reducing the tangential stress generated at the connection position between the connecting seat 6 and the main beam 1 during the adjustment process, ensuring a firm and reliable connection of the connecting seat 6.

[0046] See attached Figure 5 In the process of horizontal adjustment, both the first adjustment structure 8 and the second adjustment structure 9 need to be adaptively extended, which will not be elaborated here.

[0047] In the above adjustment process, the change of the pitch angle of the adjustment frame will change the angle between the support leg and the tunnel wall. Therefore, it is also necessary to synchronously change the length of the two supporting telescopic devices 2 in the support leg, so that the boot plate 3 can still remain in its original state and fit closely with the tunnel wall.

[0048] Moreover, since the vertical adjustment device 10 in this embodiment is connected to the connecting seat 6 and the adjustment frame through a ball joint structure, and the ball joint structure has a larger deflection angle than the spherical bearing, it is helpful to adapt to construction scenarios with larger slope changes.

[0049] The telescopic drive device, the supporting telescopic device 2, the vertical direction adjustment device 10 and the horizontal direction adjustment device 11 in this embodiment are all oil cylinders. In other embodiments, they can also be air cylinders or electric push rods, which will not be described in detail here.

[0050] For the Kai type TBM, it includes an excavation part, an inner Kai connected to the excavation part, and a rear support installed at the rear end of the inner Kai. The structure of the rear support is the same as that of the main beam type 1 TBM, which will not be repeated here.

[0051] Specific embodiment 2 of the open TBM provided by the present invention: This embodiment is based on the first embodiment, and is different from the first embodiment in that the second adjustment structure in this embodiment is a fixed-length auxiliary member, specifically, the auxiliary member can be an auxiliary rod, and the two ends of the auxiliary rod are respectively connected to the crossbeam and the auxiliary seat through a ball joint structure. The first adjustment structure in this embodiment is still a telescopic drive device, which can be used to change the pitch angle of the adjustment frame.

[0052] Specific embodiment 3 of the open TBM provided by the present invention: This embodiment is based on the second embodiment, and is different from the second embodiment in that the first adjustment structure in this embodiment is an airbag, and the front and rear ends of the airbag are respectively fixedly connected to the connecting seat and the adjustment frame, and when the airbag at the front of the adjustment frame expands and the airbag at the rear contracts, the upper position of the adjustment frame can move backward, and the pitch angle adjustment of the adjustment frame can also be achieved. The second adjustment structure in this embodiment is still an auxiliary component.

[0053] Specific embodiment 4 of the open TBM provided by the present invention: This embodiment is based on embodiment 1, and the difference from embodiment 1 is that, see attached Figure 7 In this embodiment, only one crossbeam 5 of the adjustment frame is provided, but two auxiliary seats 7 are provided, and the crossbeam 5 is located between the two auxiliary seats 7. Therefore, the telescopic end of the second adjustment structure 9 in this embodiment faces the crossbeam 5.

[0054] Specific embodiment 5 of the open TBM provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the connecting seats in this embodiment are not arranged in pairs, the adjustment frame includes a front frame body and a rear frame body, the front frame body and the rear frame body are connected by a connecting rod, and the connecting seat and the auxiliary seat are both located between the front frame body and the rear frame body.

[0055] Specific embodiment 6 of the open TBM provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that, in this embodiment, the connecting seat is located below the main beam, and the auxiliary seat is located above the main beam. In this embodiment, the upper end of the vertical adjustment device is connected to the adjustment frame, and the lower end is connected to the connecting seat.

[0056] Specific embodiment 7 of the open TBM provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the supporting legs in this embodiment only include a supporting telescopic device, which is movably connected to the boot plate and is specifically a ball joint connection, so that the boot plate can also adaptively fit to the tunnel wall when the supporting legs are not perpendicular to the tunnel wall.

[0057] Specific embodiment 8 of the open TBM provided by the present invention: This embodiment is based on Embodiment 1, and differs from Embodiment 1 in that the vertical direction adjustment device and the horizontal direction adjustment cylinder in this embodiment are connected to the connecting seat and the adjusting frame through joint bearings.

[0058] In other implementations of this embodiment, the connection positions of the vertical adjustment device and the horizontal adjustment cylinder with the connecting seat and the adjustment frame can be partially joint bearings and partially ball joint structures, which will not be elaborated here.

[0059] Specific embodiments of the rear support of the open TBM provided by the present invention: The rear support of the open TBM is the rear support in any one of the above-mentioned embodiments 1-8 of the open TBM, which will not be described in detail here.

[0060] 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 rear support for an open-type TBM, comprising an adjustment frame, a connecting seat (6), and a vertical adjustment device (10) connected between the adjustment frame and the connecting seat (6), wherein: The invention also comprises an auxiliary seat (7), a first adjustment structure (8) is arranged between the connecting seat (6) and the adjustment frame, and a second adjustment structure (9) is arranged between the auxiliary seat (7) and the adjustment frame. One of the first adjustment structure (8) and the second adjustment structure (9) is used to drive the corresponding part of the adjustment frame to move forward and backward, and the other is used to keep the corresponding part of the adjustment frame in place, or the first adjustment structure (8) and the second adjustment structure (9) are respectively used to drive the corresponding part of the adjustment frame to move in the reverse direction in the forward and backward directions, so as to make the adjustment frame pitch and rotate.

2. The rear support of the open TBM according to claim 1 is characterized in that: The first adjustment structure (8) and the second adjustment structure (9) are both telescopic drive devices, the telescopic drive devices are movably connected to the adjustment frame, and the telescopic drive devices are movably connected to the connecting seat (6) or the auxiliary seat (7).

3. The rear support of the open TBM according to claim 1, characterized in that: One of the first adjustment structure (8) and the second adjustment structure (9) is a telescopic drive device, and the other is a fixed-length auxiliary component. The telescopic drive device and the auxiliary component are both movably connected to the adjustment frame, and the telescopic drive device and the auxiliary component are movably connected to the connecting seat (6) or the auxiliary seat (7).

4. The rear support of an open TBM according to any one of claims 1 to 3, characterized in that: The connecting seat (6) is used to be installed on the upper side of the main beam or the inner shell, and the auxiliary seat (7) is used to be installed on the lower side of the main beam or the inner shell.

5. The rear support of an open TBM according to any one of claims 1 to 3, characterized in that: The first adjustment structure (8) and the second adjustment structure (9) are arranged in pairs, the two first adjustment structures (8) of the same pair are respectively located in front of and behind the connecting seat (6) or the adjustment frame, and the two second adjustment structures (9) of the same pair are respectively located in front of and behind the auxiliary seat (7) or the adjustment frame.

6. The rear support of the open TBM according to claim 5, characterized in that: The first adjustment structure (8) and the second adjustment structure (9) are arranged in pairs, the two first adjustment structures (8) of the same pair are respectively located in front of and behind the adjustment frame, the two second adjustment structures (9) of the same pair are respectively located in front of and behind the adjustment frame, the connecting seat (6) and the auxiliary seat (7) are also arranged in pairs, the two connecting seats (6) of the same pair are respectively located in front of and behind the adjustment frame, and the two auxiliary seats (7) of the same pair are respectively located in front of and behind the adjustment frame.

7. The rear support of the open TBM according to claim 5, characterized in that: The first adjustment structure (8) and the second adjustment structure (9) are arranged in pairs, the two first adjustment structures (8) of the same pair are respectively located in front of and behind the adjustment frame, the two second adjustment structures (9) of the same pair are respectively located in front of and behind the auxiliary seat (7), the connecting seats (6) are arranged in pairs and the two connecting seats (6) of the same pair are respectively located in front of and behind the adjustment frame, the adjustment frame comprises connecting parts arranged in pairs for connecting with the second adjustment structures, the two connecting parts of the same pair are respectively located in front of and behind the auxiliary seat (6).

8. The rear support of an open TBM according to any one of claims 1 to 3, characterized in that: The adjustment frame is provided with a support leg, the end of which is connected to a boot plate (3) for tightening to the hole wall, the support leg comprises two supporting telescopic devices (2) arranged in the front-rear direction, and the two ends of the two supporting telescopic devices (2) are respectively movably connected to the adjustment frame and the boot plate (3).

9. The rear support of an open TBM according to any one of claims 1 to 3, characterized in that: The vertical direction adjustment device is connected to the connecting seat (6) and / or the adjustment frame via a ball joint structure.

10. An open type TBM, comprising a rear support and a main beam or inner keel, characterized in that: The rear support is the rear support of the open TBM as described in any one of claims 1-9.

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