A tension telescopic TBM shield and tunnel boring machine

Abstract

This invention discloses a tension-retractable TBM shield and tunnel boring machine, belonging to the field of TBM equipment technology. The tension-retractable TBM shield includes: a tension shield shell, positioned above the shield body; both ends of the tension shield shell are connected to shield plate supports via snap-fit ​​connectors; the shield plate supports are movably connected to the shield body and can move circumferentially and radially along the shield body; the snap-fit ​​connectors have grooves along the shield body's axial direction, allowing the ends of the tension shield shell to slide within these grooves; the snap-fit ​​connectors on both sides arch the tension shield shell, supporting the tunnel wall. This tension-retractable TBM shield avoids the problem of shield jamming when encountering large deformation surrounding rock or adverse geological conditions, preventing timely self-rescue and escape, thus avoiding project delays and accelerating construction progress.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of TBM equipment, in particular to a tension telescopic TBM shield and a tunnel boring machine. BACKGROUND

[0002] TBM (tunnel boring machine) is a kind of tunnel construction equipment with the characteristics of factory-like assembly line, which can realize parallel and continuous operation of construction processes such as tunneling, supporting and slag removal, and is integrated with systems such as machine, electricity, liquid, light and gas.

[0003] The TBM (tunnel boring machine) tunneling device needs to be provided with a shield to protect the machine body and support the newly excavated surrounding rock. Due to the swelling of the surrounding rock under the action of ground pressure after excavation, the tunnel will shrink, so that the existing shield body with various structures is easy to form a shield when encountering large deformation surrounding rock or poor geological section, which cannot timely self-rescue and escape, resulting in prolonged construction period and being not conducive to construction. SUMMARY

[0004] The purpose of the present application is to overcome the problems in the prior art and provide a tension telescopic TBM shield to avoid the problem that the existing shield body with various structures causes shield jamming when encountering large deformation surrounding rock or poor geological section, which cannot timely self-rescue and escape, thereby avoiding prolonged construction period and speeding up construction progress.

[0005] The present application provides a tension telescopic TBM shield, comprising: a tension shield shell, the tension shield shell is arranged above the shield body, both ends of the tension shield shell are connected to the shield plate support through the clamping pieces, the shield plate support is movably connected to the shield body, and the shield plate support can move along the radial direction and the radial direction of the shield body, the clamping piece is provided with a sliding groove arranged along the axial direction of the shield body, and the end of the tension shield shell can slide in the sliding groove; the clamping pieces on both sides arch the tension shield shell to support the inner wall of the tunnel.

[0006] Preferably, the tension telescopic TBM shield further comprises a shield locking ring, the shield locking ring is arranged at the end of the tension shield shell close to the tunneling end, one end of the shield locking ring is connected to one side of the shield, and the other end is connected to a pulling structure, the pulling structure is arranged on the other side of the shield, and the pulling structure is used for pressing the front end of the tension shield shell close to the tunneling end to the shield body by tightening the shield locking ring.

[0007] Preferably, the plurality of tension shells are arranged in a stacked manner, and the ends of the plurality of tension shells are clamped in the clamping member; the outer surface of the shield body is provided with a plurality of elastic supports for supporting the tension shells, one end of the elastic support is fixed to the inner surface of the shield body, and the other end of the elastic support abuts the lower surface of the lowermost tension shell through the shield body, and the elastic support is used to generate a constant auxiliary supporting force on the tension shell.

[0008] Preferably, the shield body and the plurality of tension shells are provided with a plurality of threaded holes, and the threaded holes are threadedly connected by bolts from the lower side of the shield body, so as to limit the movement of the tension shells.

[0009] Preferably, the outer periphery of the shield body is provided with a circumferential T-shaped sliding groove, the T-shaped sliding groove is connected with a T-shaped sliding block, the T-shaped sliding block is fixedly connected with the shield plate support through a first oil cylinder, the first oil cylinder is arranged along the radial direction of the shield body, and the T-shaped sliding groove is provided with a detachable limiting block for limiting the rotation of the T-shaped sliding block.

[0010] Preferably, the pulling structure comprises two second oil cylinders, one end of each of the two second oil cylinders is hingedly connected to the inner wall of the shield body, the other end of each of the two second oil cylinders passes through a through hole provided in the inner wall of the shield body, the through hole is in communication with the inner bottom wall of the T-shaped sliding groove, and the other end of each of the two second oil cylinders is hingedly connected with one of the T-shaped sliding blocks, so as to drive the T-shaped sliding blocks to slide in the T-shaped sliding groove.

[0011] Preferably, the number of the tension shells is a plurality, and the plurality of tension shells are arranged in a stacked manner above the shield body, and the shield locking clasp is located outside the uppermost tension shell.

[0012] Preferably, the tunnel boring machine comprises the tension telescopic TBM shield.

[0013] Compared with the prior art, the tension telescopic TBM shield has the beneficial effects that: the two ends of the tension shell are limited in a clamping member, so that the tension shell is arched to support the inner wall of the tunnel, when the shield is stuck due to large deformation surrounding rock or poor geological section, the friction between the tension shell and the inner wall of the tunnel is increased, in the process of continuous tunneling of the TBM (tunnel boring machine), the tension shell is slipped out of the clamping member, and the shield body supports the inner wall of the tunnel again; the tension telescopic TBM shield avoids the problems that the shield of various structures in the prior art is stuck when large deformation surrounding rock or poor geological section is encountered, cannot be rescued and escaped in time, and the construction period is prolonged, thereby accelerating the construction progress. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 is an assembly view of the present application;

[0015] Fig. 2 is a sectional view of the present application;

[0016] Fig. 3 Figure 1 is a schematic diagram of the present application.

[0017] Reference signs:

[0018] 6. shield, 101. tension shield, 103. shield support, 104. clamping piece, 105. shield locking clasp, 106. elastic support, 107. bolt, 108. second oil cylinder. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application are described in detail below, but it should be understood that the scope of protection of the present application is not limited by the specific embodiments. Based on the examples in the present application, all other examples obtained by those of ordinary skill in the art without creative labor are within the scope of protection of the present application.

[0020] The present application provides a tension telescopic TBM shield, which is arranged on a shield body 6 of a TBM, as shown in Figs. 1-3 The tension telescopic TBM shield comprises a tension shield 101 arranged above the shield body 6, both ends of the tension shield 101 are connected to shield supports 103 through clamping pieces 104, the shield supports 103 are movably connected to the shield body 6, and the shield supports 103 can move along the circumferential direction and the radial direction of the shield body 6, the clamping pieces 104 are provided with sliding grooves arranged along the axial direction of the shield body 6, and the ends of the tension shield 101 can slide in the sliding grooves; the clamping pieces 104 on both sides arch the tension shield 101 to support the inner wall of the tunnel.

[0021] The tension telescopic TBM shield limits both ends of the tension shield in a clamping piece respectively, the clamping piece is a U-shaped groove, so that the tension shield is arched to support the inner wall of the tunnel, when the shield is stuck due to large deformation surrounding rock or poor geological section, the friction between the tension shield 101 and the inner wall of the tunnel increases, in the process of continuous tunneling of the TBM (tunnel boring machine), the tension shield 101 slides out of the clamping piece, and the shield body 6 supports the inner wall of the tunnel again; the tension telescopic TBM shield avoids the problem that the shield of various existing structures is stuck when encountering large deformation surrounding rock or poor geological section, and cannot be rescued and escaped in time, thereby avoiding the extension of the construction period and accelerating the construction progress.

[0022] Preferably, as shown in Figs. 1-3 The tension telescopic TBM shield further comprises a shield locking clasp 105, the shield locking clasp 105 is arranged at the end of the tension shield 101 close to the tunneling end, both ends of the shield locking clasp 105 are connected to the shield supports 103, both shield supports 103 are connected to both ends of a pulling structure arranged in the shield body 6, and the pulling structure can tighten the shield locking clasp 105 after operation, so as to press the end of the tension shield 101 close to the tunneling end towards the shield body 6.

[0023] The lock shield clasp 105 is used to apply a force to the front end of the tension shield shell 101 to tightly adhere to the shield body 6, so that the lock shield clasp 105 and the shield body 6 can jointly clamp the front end of the tension shield shell 101, thereby avoiding the problem that the surrounding rock scratches the tension shield shell 101 from the front end, and preventing the tension shield shell 101 from slipping off at will; when the shield body is stuck due to a large frictional resistance, the control pulling structure is appropriately elongated or loosened, so that the tension shield shell 101 slips off to solve the problem, and when the shield body encounters a small resistance, the control pulling structure is shortened or tightened to prevent the tension shield shell 101 from slipping off.

[0024] Preferably, as Figs. 2-3 The tension shield shell 101 is multiple and arranged in overlap with each other, and the ends of the multiple tension shield shells 101 are jointly clamped in the clamping piece 104; the outer surface of the shield body 6 is provided with multiple elastic supporting pieces 106 for supporting the tension shield shell 101, one end of the elastic supporting piece 106 is fixed to the inner surface of the shield body 6, and the other end of the elastic supporting piece 106 abuts against the lower surface of the lowermost tension shield shell 101 through the shield body 6, and the elastic supporting piece 106 is used to generate a constant auxiliary supporting force on the tension shield shell 101.

[0025] When the tension shield shell 101 is multiple and arranged in overlap with each other, the elastic supporting piece 106 generates a constant supporting force on the lowermost tension shield shell 101, when the uppermost tension shield shell 101 slips off, the distance between the shield body 6 and the inner wall of the surrounding rock increases, the elastic supporting piece 106 pushes the remaining tension shield shells 101 to move upward as a whole, and keeps the supporting force constant, the elastic supporting piece 106 is a hydraulic push rod, by controlling the pressure of the hydraulic oil, the hydraulic push rod keeps the supporting force on the tension shield shell 101 constant.

[0026] Preferably, as Fig. 3 The shield body 6 and the multiple tension shield shells 101 are each provided with multiple threaded holes, and the threaded holes are threadedly connected by bolts 107 from below the shield body 6, so as to limit the movement of the tension shield shells 101.

[0027] In order to prevent the tension shield shell 101 from slipping off at will, multiple bolts 107 are threadedly connected from below the shield body 6, when the shield is stuck, the bolts 107 are appropriately rotated by a distance downward, so that the bolts 107 are out of the threaded connection with the uppermost tension shield shell 101, and the bolts 107 do not have a limiting function on the uppermost tension shield shell 101, so that the uppermost tension shield shell 101 can slip off.

[0028] Preferably, the outer periphery of the shield body 6 is provided with a circumferential T-shaped sliding groove, the T-shaped sliding groove is connected with a T-shaped sliding block, the T-shaped sliding block is fixedly connected with the shield plate support 103 through a first oil cylinder, and the first oil cylinder is arranged along the radial direction of the shield body 6, and the T-shaped sliding groove is provided with a detachable limiting block for limiting the rotation of the T-shaped sliding block.

[0029] Preferably, as Fig. 2 The pulling structure comprises two second oil cylinders 108, one end of which is hinged to the inner wall of the shield 6, and the other end respectively passes through the through hole provided in the inner wall of the shield 6, the through hole is in communication with the inner bottom wall of the T-shaped sliding groove, and the end of the two second oil cylinders 108 is respectively hinged to one of the T-shaped sliding blocks, so as to drive the T-shaped sliding block to slide in the T-shaped sliding groove.

[0030] By controlling the extension or shortening of the two second oil cylinders 108, the driving of the T-shaped sliding block, the first oil cylinder and the shield plate support 103 to move along the arc of the T-shaped sliding groove is realized, so as to control the position of the two shield plate supports 103.

[0031] Preferably, the number of the tension shield shells 101 is multiple, and the multiple tension shield shells 101 are stacked and arranged above the shield 6, and the lock shield clasp 105 is located outside the uppermost tension shield shell 101.

[0032] Preferably, the tunnel boring machine comprises the tension telescopic TBM shield.

[0033] The use method of the tension telescopic TBM shield of the present application is as follows:

[0034] During the continuous tunneling process of the TBM (tunnel boring machine), when the shield encounters large deformation surrounding rock or poor geological section, the shield is stuck, the pulling structure is appropriately elongated or loosened, and the downward knob bolt 107 is appropriately moved by a distance, so that the bolt 107 is out of the threaded connection with the uppermost tension shield shell 101, the bolt 107 does not have a limiting function for the uppermost tension shield shell 101, and then the outermost tension shield shell 101 slips off to solve the problem.

[0035] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A tensioned telescopic TBM shield arranged on a shield body (6) of a TBM, characterized in that, The tension shield (101) is arranged above the shield body (6), both ends of the tension shield (101) are connected to the shield plate support (103) through the clamping piece (104), the shield plate support (103) is movably connected to the shield body (6), and the shield plate support (103) can move along the ring direction and the radial direction of the shield body (6), the clamping piece (104) is provided with a sliding groove arranged in the axial direction of the shield body (6), and the end of the tension shield (101) can slide in the sliding groove; the clamping pieces (104) on both sides arch the tension shield (101) to support the inner wall of the tunnel, the tension shield (101) is arranged in multiple and overlaps with each other, and the ends of the multiple tension shields (101) are clamped in the clamping piece (104) together; a plurality of elastic supports (106) for supporting the tension shield (101) are arranged on the outer surface of the shield body (6), one end of the elastic support (106) is fixed to the inner surface of the shield body (6), the other end of the elastic support (106) penetrates through the shield body (6) and abuts against the lower surface of the lowermost tension shield (101), and the elastic support (106) is used to generate a constant auxiliary supporting force on the tension shield (101); The lock shield clamping ring (105) is arranged at the end of the tension shield (101) close to the tunneling end, both ends of the lock shield clamping ring (105) are connected to the shield plate supports (103), the two shield plate supports (103) are connected to the two ends of the pulling structure arranged in the shield body (6), the pulling structure can tighten the lock shield clamping ring (105) after being actuated, and is used to press the end of the tension shield (101) close to the tunneling end towards the shield body (6), the pulling structure comprises two second oil cylinders (108), one end of each of the two second oil cylinders (108) is hinged to the inner wall of the shield body (6), the other end penetrates through the through hole provided in the inner wall of the shield body (6), and the multiple tension shields (101) are arranged above the shield body (6) in a stacked manner, and the lock shield clamping ring (105) is located outside the uppermost tension shield (101). A plurality of threaded holes are arranged on the shield body (6) and the multiple tension shields (101), and the threaded holes are connected by bolts (107) from the lower side of the shield body (6) in a threaded manner, so as to limit the movement of the tension shields (101).

2. The tensioning telescopic TBM shield of claim 1, wherein, The outer periphery of the shield body (6) is provided with a ring-shaped T-shaped sliding groove, the T-shaped sliding groove is connected with a T-shaped sliding block in a matched mode, the T-shaped sliding block is fixedly connected with the shield plate support (103) through a first oil cylinder, and the first oil cylinder is arranged in the radial direction of the shield body (6); and the T-shaped sliding groove is provided with a detachable limiting block for limiting the rotation of the T-shaped sliding block.

3. The tensioning telescopic TBM shield of claim 1, wherein, The through hole is in communication with the inner bottom wall of the T-shaped sliding groove, and the ends of the two second oil cylinders (108) are respectively hinged to one of the T-shaped sliding blocks, so as to drive the T-shaped sliding block to slide in the T-shaped sliding groove.

4. The tensioned telescopic TBM shield of claim 3, wherein, The tension telescopic TBM shield comprises the tension telescopic TBM shield according to any one of claims 1-4.

5. A tunnel boring machine characterized by, ​

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