Tunnel boring device and tunnel boring machine

Abstract

A tunnel boring device and a tunnel boring machine, which aim to solve the problem of a hinged oil cylinder being likely to be damaged due to a propulsion mode. The tunnel boring device (100) comprises a front shield (110), a middle shield (120), and a tail shield (130). A first propulsion assembly (140), a second propulsion assembly (150) and an auxiliary propulsion member (160) are provided inside the tunnel boring device; the auxiliary propulsion member (160) is located between the front shield (110) and the second propulsion assembly (150); and when the front shield (110) is stuck, the second propulsion assembly (150) moves in a tunneling direction, such that a second end of the second propulsion assembly (150) comes into contact with and abuts against the auxiliary propulsion member (160), thereby pushing the front shield (110) to free the front shield. In the present application, a dual-mechanical force transmission structure is provided, which helps to avoid the risk whereby a hinged oil cylinder is likely to be damaged when ultrahigh thrust is transmitted to the front shield by means of a single mechanical force transmission structure, and which transmits the ultrahigh thrust to the front shield, facilitating escape of the front shield, and then guaranteeing normal boring of a tunnel boring machine.

Description

Tunnel boring equipment and tunnel boring machines

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 24, 2023, with application number 202311391020.1 and application name “Tunnel Boring Device and Tunnel Boring Machine”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of tunnel construction, and in particular to a tunnel boring device and a tunnel boring machine. Background Art

[0003] A shield machine, also known as a shield tunnel boring machine, is a specialized engineering machine used for tunnel excavation. It performs functions such as excavating and cutting soil, transporting soil debris, assembling tunnel linings, and performing measurement, guidance, and deviation correction. Using a shield machine for tunnel construction offers advantages such as high automation, labor savings, and rapid construction. Shield machines are particularly economical and reasonable for long tunnels with deep burial depths.

[0004] During tunneling, uneven construction levels, geological factors, or extended downtime can inevitably cause the front shield to jam, hindering tunneling. Conventional shield machines are susceptible to this condition, hindering construction progress. Related technologies often use articulated cylinders to transmit ultra-high thrust to the front shield to ensure normal tunneling.

[0005] However, in the above-mentioned propulsion method, the articulated oil cylinder is easily damaged.

[0006] Summary of the Invention

[0007] The embodiments of the present application provide a tunnel boring device and a tunnel boring machine, which are beneficial to avoiding the risk of damage to the articulated cylinder when transmitting ultra-high thrust to the front shield through a single mechanical force transmission structure; at the same time, the present application helps to free the front shield, thereby ensuring the normal excavation of the shield machine.

[0008] To achieve the above objectives, a first aspect of an embodiment of the present application provides a tunnel boring device, comprising a front shield, a middle shield, and a tail shield, wherein the front shield is located on a side of the tunnel boring device close to an excavation end, the tail shield is located on a side of the tunnel boring device away from the excavation end, and the middle shield is connected between the front shield and the tail shield; a first propulsion assembly, a second propulsion assembly, and at least one auxiliary propulsion member are disposed within the tunnel boring device, wherein a first end of the first propulsion assembly is connected to the front shield, a second end of the first propulsion assembly is connected to the middle shield, and the second propulsion assembly and the first propulsion assembly are arranged side by side in a radial direction of the tunnel boring device; the auxiliary propulsion member is located between the front shield and the second propulsion assembly, a first end of the auxiliary propulsion member is fixedly connected to the front shield, and a second end of the auxiliary propulsion member is located on a side close to the second propulsion assembly. When the front shield becomes stuck, the second propulsion assembly moves in the excavation direction so that the second end of the second propulsion assembly contacts and presses against the auxiliary propulsion member, thereby pushing the front shield to free the front shield.

[0009] In one possible implementation, the auxiliary propulsion members include a plurality of auxiliary propulsion members, which are arranged in a circular array along the axis of the tunnel boring device. The ends of the plurality of auxiliary propulsion members located near the front shield are fixedly connected to the front shield, and the ends of the plurality of auxiliary propulsion members located near the middle shield are used to press against the second propulsion assembly when the second propulsion assembly moves along the excavation direction.

[0010] In one possible implementation, the auxiliary propulsion members include multiple ones, and the multiple auxiliary propulsion members are connected along the axial direction from the front shield to the middle shield. The auxiliary propulsion member located on the side close to the front shield is fixedly connected to the front shield, and the auxiliary propulsion member located on the side close to the middle shield is used to press against the second propulsion assembly when the second propulsion assembly moves along the excavation direction.

[0011] In one possible implementation, the second propulsion assembly includes a second propulsion cylinder; the second end of the auxiliary propulsion member is located on a side close to the second propulsion cylinder, and when the front shield is stuck, the second propulsion cylinder moves along the excavation direction and presses against the auxiliary propulsion member.

[0012] In one possible implementation, the second propulsion assembly further includes a gripper shoe connected to the first end of the second propulsion cylinder, and the interior of the tunnel boring device is lined with a pipe segment; when the front shield is stuck, the gripper shoe moves in a direction away from the auxiliary propulsion member and presses against the pipe segment, so that the second propulsion cylinder moves in a direction close to the auxiliary propulsion member and presses against the auxiliary propulsion member.

[0013] In a possible implementation, a hydraulic pump station is further included, which is connected to the second propulsion cylinder. The hydraulic pump station is used to provide ultra-high-pressure hydraulic oil to the second propulsion cylinder when the front shield is stuck, so as to drive the piston rod in the second propulsion cylinder to extend.

[0014] In a possible implementation, an elastic member is further included, and the elastic member is arranged between the auxiliary propulsion member and the second propulsion assembly; the second end of the second propulsion assembly is pressed against the auxiliary propulsion member through the elastic member.

[0015] In a possible implementation, the first propulsion assembly includes a first propulsion cylinder, and two ends of the first propulsion cylinder are respectively connected to the front shield and the middle shield.

[0016] In one possible implementation, the auxiliary propulsion member is a columnar rigid support seat or a cylindrical rigid support seat; and / or the elastic member is a rubber pad; the elastic member is connected to the auxiliary propulsion member by bonding; and / or the auxiliary propulsion member is fixedly connected to the front shield by any one of threaded connection, clamping or welding.

[0017] A second aspect of the embodiments of the present application further provides a tunnel boring machine comprising at least an excavation device, a slag discharge device and a tunnel boring device.

[0018] The tunnel boring device and tunnel boring machine provided in the embodiments of the present application include a first propulsion assembly, a second propulsion assembly and at least one auxiliary propulsion member. The second propulsion assembly and the auxiliary propulsion member, as well as the second propulsion assembly and the first propulsion assembly together form a dual mechanical force transmission structure, so that ultra-high thrust can be simultaneously transmitted to the front shield through the dual mechanical force transmission structure, which is beneficial to avoiding the risk of damage to the articulated cylinder caused by transmitting ultra-high thrust to the front shield through a single articulated cylinder, and provides maximum safety protection for the articulated cylinder; at the same time, the present application transmits force through the dual mechanical force transmission structure, which is beneficial to quickly transmit ultra-high thrust to the front shield, thereby quickly achieving the front shield's escape and ensuring the normal excavation of the shield machine.

[0019] The structure of the present application and its other application objectives and beneficial effects will be more clearly understood through the description of the preferred embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0021] FIG1 is a schematic structural diagram of a tunnel boring device provided in an embodiment of the present application;

[0022] FIG2 is a cross-sectional view of a tunnel boring device provided in an embodiment of the present application;

[0023] FIG3 is a schematic diagram of a partially enlarged structure of part I in FIG2 ;

[0024] FIG4 is a schematic diagram of a partially enlarged structure of part II in FIG3 ;

[0025] FIG5 is a first structural diagram of multiple auxiliary propulsion components of a tunnel boring device according to an embodiment of the present application;

[0026] FIG6 is a second structural diagram of multiple auxiliary propulsion components of a tunnel boring device according to an embodiment of the present application;

[0027] FIG7 is a schematic structural diagram of a tunnel boring device provided by an embodiment of the present application in a normal excavation process with no jamming of the front shield;

[0028] FIG8 is a structural diagram showing that when the front shield of the tunnel boring device provided by an embodiment of the present application is stuck, the second propulsion assembly moves along the excavation direction and contacts and presses against the auxiliary propulsion member.

[0029] Explanation of the accompanying reference numerals: 100 - tunnel boring device; 110 - front shield; 120 - middle shield; 130 - tail shield; 140 - first propulsion assembly; 141 - first end of the first propulsion assembly; 142 - second end of the first propulsion assembly; 143 - first propulsion cylinder; 150 - second propulsion assembly; 151 - first end of the second propulsion assembly; 152 - second end of the second propulsion assembly; 153 - second propulsion cylinder; 154 - support shoe; 160 - auxiliary propulsion member; 161 - first end of the auxiliary propulsion member; 162 - second end of the auxiliary propulsion member; 170 - elastic member; 180 - pipe segment. DETAILED DESCRIPTION

[0030] With the development of the national economy and the acceleration of tunnel construction, the shield method has become widely used due to its cost-effectiveness. The shield method is a fully mechanized construction method. It involves pushing a shield machine underground, using the shield casing and segments to support the surrounding rock to prevent collapse into the tunnel. Simultaneously, a cutting device excavates soil in front of the excavation face. The soil is then transported out of the tunnel by excavation machinery, where it is pressurized and pushed forward by jacks at the rear. Precast concrete segments are then assembled to form the tunnel structure.

[0031] A shield machine, also known as a shield tunnel boring machine, is a specialized engineering machine used for tunnel excavation. It performs functions such as excavating and cutting soil, transporting soil debris, assembling tunnel linings, and performing measurement, guidance, and deviation correction. Using a shield machine for tunnel construction offers advantages such as high automation, labor savings, and rapid construction. Shield machines are particularly economical and reasonable for long tunnels with deep burial depths.

[0032] During tunneling, shield machines can inevitably become stuck, hindering tunneling due to uneven construction levels, geological factors, or extended downtime. For example, unstable geological conditions, deformation, and subsidence can cause the shield machine to become stuck and unable to advance normally. Conventional shield machines are prone to becoming stuck under these conditions, hindering construction progress.

[0033] In the prior art, a single articulated cylinder is often used to transmit high thrust to the front shield to ensure normal tunneling of the shield machine. However, when using a single articulated cylinder to transmit high thrust to the front shield, the articulated cylinder needs to generate sufficient oil pressure, which can easily cause damage to the articulated cylinder due to excessive oil pressure.

[0034] Based on the above technical problems, an embodiment of the present application provides a tunnel boring device and a tunnel boring machine, which includes a first propulsion assembly, a second propulsion assembly and at least one auxiliary propulsion member. The second propulsion assembly and the auxiliary propulsion member, as well as the second propulsion assembly and the first propulsion assembly together form a dual mechanical force transmission structure, so that the ultra-high thrust can be simultaneously transmitted to the front shield through the dual mechanical force transmission structure, which is beneficial to avoid the risk of damage to the articulated cylinder caused by transmitting ultra-high thrust to the front shield through a single articulated cylinder, and provides maximum safety protection for the articulated cylinder; at the same time, the present application transmits force through the dual mechanical force transmission structure, which is beneficial to quickly transmit the ultra-high thrust to the front shield, thereby quickly realizing the front shield's escape and ensuring the normal excavation of the shield machine.

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0036] Figure 1 is a schematic structural diagram of a tunnel boring device provided in an embodiment of the present application, Figure 2 is a cross-sectional view of a tunnel boring device provided in an embodiment of the present application, Figure 3 is a partially enlarged structural diagram of part I in Figure 2, Figure 4 is a partially enlarged structural diagram of part II in Figure 3, Figure 5 is a structural schematic diagram I of multiple auxiliary propulsion members of the tunnel boring device provided in an embodiment of the present application, Figure 6 is a structural schematic diagram II of multiple auxiliary propulsion members of the tunnel boring device provided in an embodiment of the present application, Figure 7 is a structural schematic diagram of the tunnel boring device provided in an embodiment of the present application in a normal excavation process and the front shield is not stuck, and Figure 8 is a structural schematic diagram of the second propulsion assembly moving along the excavation direction and contacting and pressing against the auxiliary propulsion member when the front shield of the tunnel boring device provided in an embodiment of the present application is stuck.

[0037] 1 to 4 , an embodiment of the present application provides a tunnel boring machine, which is mainly used in tunnels to excavate tunnel strata. In the embodiment of the present application, a shield tunnel boring machine is mainly used as an example for description.

[0038] A tunnel boring machine (TBM) comprises at least an excavation device, a slag discharge device, and a tunnel boring device 100. The excavation device is located at the tunneling end of the tunnel boring device and is used to excavate the tunnel strata. The tunneling end is the front end, and the excavation device is the cutterhead. The slag discharge device is connected to the excavation device and is used to discharge slag and rock excavated by the excavation device to the outside of the tunnel.

[0039] 2 and 3 , the tunnel boring device 100 includes a front shield 110 , a middle shield 120 , and a tail shield 130 . The front shield 110 is located on a side of the tunnel boring device 100 close to the boring end, the tail shield 130 is located on a side of the tunnel boring device 100 away from the boring end, and the middle shield 120 is connected between the front shield 110 and the tail shield 130 .

[0040] It should be noted that the tunneling end is also called the excavation end, which is located at the front end of the tunnel boring device 100.

[0041] A first propulsion assembly 140 , a second propulsion assembly 150 , and at least one auxiliary propulsion member 160 are disposed inside the tunnel boring device 100 .

[0042] For example, the auxiliary propulsion member 160 may include one, two, or multiple auxiliary propulsion members 160. In the embodiment of the present application, the description is mainly based on an example of including one auxiliary propulsion member 160.

[0043] The structures of the first propulsion assembly 140 and the second propulsion assembly 150 are described as follows:

[0044] 2 and 3 , the first propulsion assembly 140 includes a first propulsion cylinder 143, the ends of which are respectively connected to the front shield 110 and the middle shield 120. The second propulsion assembly 150 includes a second propulsion cylinder 153 and a gripper shoe 154. The gripper shoe 154 is connected to the first end 151 of the second propulsion assembly, which serves as the end of the second propulsion cylinder 153.

[0045] The assembly structure of the first propulsion assembly 140, the second propulsion assembly 150 and the auxiliary propulsion member 160 is described as follows:

[0046] During assembly, the first end 141 of the first propulsion assembly is connected to the front shield 110, and the second end 142 of the first propulsion assembly is connected to the middle shield 120. The second propulsion assembly 150 and the first propulsion assembly 140 are arranged side by side along the radial direction of the tunnel boring device 100.

[0047] It should be noted that the radial direction of the tunnel boring device 100 is a straight line direction along the diameter or radius.

[0048] The auxiliary propulsion member 160 is located between the front shield 110 and the second propulsion assembly 150. Its first end 161 is fixedly connected to the front shield 110, and its second end 162 is located near the second end 152 of the second propulsion assembly. The interior of the tunnel boring device 100 is lined with segments 180. When the front shield 110 becomes stuck, the gripper shoe 154 moves away from the auxiliary propulsion member 160 and abuts against the segment 180, causing the second propulsion cylinder 153 to move in the tunneling direction and abut against the auxiliary propulsion member 160.

[0049] The excavation direction is shown as the direction of arrow A in Figure 2.

[0050] For example, the first end 161 of the auxiliary propulsion member may be fixedly connected to the front shield 110 by flange connection, welding, or threaded connection.

[0051] The mechanical force transmission structure and mechanical force transmission path of the tunnel boring device 100 provided in the embodiment of the present application are described as follows:

[0052] The first mechanical force transmission structure includes a second propulsion assembly 150 and an auxiliary propulsion member 160 .

[0053] The first mechanical force transmission path: When the front shield 110 is stuck, the gripper 154 moves away from the auxiliary propulsion member 160 and presses against the pipe segment 180, and the second propulsion cylinder 153 moves in the excavation direction and presses against the auxiliary propulsion member 160. Since the auxiliary propulsion member 160 and the front shield 110 are fixedly connected, the ultra-high thrust can be transmitted to the front shield 110 via the auxiliary propulsion member 160, so that the front shield 110 can be freed under the action of the ultra-high thrust, thereby ensuring the normal excavation of the shield machine.

[0054] For example, the force transmission direction of the first force transmission path can be directed in the direction of arrow A1 in Figures 7 and 8. Specifically, Figure 7 illustrates the structure of the tunnel boring device 100 during normal tunneling, with the front shield 110 not stuck. At this time, the auxiliary propulsion member 160 and the second propulsion assembly 150 are disconnected. Figure 8 illustrates the structure of the second propulsion assembly 150 moving in the tunneling direction and contacting and abutting against the auxiliary propulsion member 160 when the front shield 110 is stuck.

[0055] The second mechanical force transmission structure includes: a second propulsion assembly 150 and a first propulsion assembly 140 .

[0056] The second mechanical force transmission path: When the front shield 110 is stuck, the gripper shoe 154 moves in the direction away from the auxiliary propulsion member 160 and abuts the pipe segment 180, and the second end 152 of the second propulsion assembly moves in the direction close to the auxiliary propulsion member 160. Since the second propulsion assembly 150 is connected to the first propulsion assembly 140, the second propulsion assembly 150 transmits the ultra-high thrust to the first propulsion assembly 140, and then transmits it to the front shield 110 through the first propulsion assembly 140. As a result, the front shield 110 can be freed under the action of the ultra-high pressure thrust, thereby ensuring the normal excavation of the shield machine.

[0057] Exemplarily, the force transmission direction of the second force transmission path can be referred to the direction of arrow A2 in Figures 7 and 8.

[0058] It should be noted that, in the embodiment of the present application, the first mechanical force transmission path and the second mechanical force transmission path can transmit force simultaneously, or force can be transmitted only through the first mechanical force transmission path. In the embodiment of the present application, the first mechanical force transmission path and the second mechanical force transmission path are mainly used as an example to illustrate the simultaneous transmission of force.

[0059] It should be noted that the jamming of the front shield 110 refers to the jamming, stagnation, and difficulty in excavation of the front shield 110 due to uneven construction levels, geological factors, or long-term downtime.

[0060] In addition, in the embodiment of the present application, a hydraulic pump station is also included, which is connected to the second propulsion cylinder 153. The hydraulic pump station is used to provide high-pressure hydraulic oil to the second propulsion cylinder 153 when the front shield 110 is stuck, thereby driving the piston rod in the second propulsion cylinder 153 to extend.

[0061] Therefore, in the embodiment of the present application, the second propulsion assembly 150 and the auxiliary propulsion member 160, as well as the second propulsion assembly 150 and the first propulsion assembly 140 together form a dual mechanical force transmission structure, so that the ultra-high thrust can be simultaneously transmitted to the front shield 110 through the dual mechanical force transmission structure, which is beneficial to avoiding the risk of damage to the articulated cylinder caused by transmitting ultra-high thrust to the front shield 110 through a single articulated cylinder, and providing maximum safety protection for the articulated cylinder; at the same time, the present application transmits force through the dual mechanical force transmission structure, which is beneficial to quickly transmit the ultra-high thrust to the front shield 110, thereby quickly achieving the escape of the front shield 110 and ensuring the normal excavation of the shield machine.

[0062] In a possible implementation, the auxiliary propulsion member 160 may include a plurality of auxiliary propulsion members 160 , and the plurality of auxiliary propulsion members 160 are connected along the axial direction from the front shield 110 to the middle shield 120 .

[0063] For example, referring to FIG5 , two auxiliary propulsion members 160 are used as an example for explanation. The auxiliary propulsion member 160 on the left is fixedly connected to the front shield 110, and the auxiliary propulsion member 160 on the right is used to press against the second propulsion assembly 150. The connection method between the two auxiliary propulsion members 160 is not further limited. For example, the two auxiliary propulsion members 160 can be connected by a hinged manner.

[0064] By including multiple auxiliary propulsion members 160, it is beneficial to increase the ultra-high thrust on the front shield 110 when transmitting force along the first mechanical force transmission path, thereby further quickly achieving the escape of the front shield 110 and ensuring normal excavation of the shield machine.

[0065] In one possible implementation, as shown in FIG6 , the auxiliary propulsion members 160 may include a plurality of auxiliary propulsion members 160 , which may be arranged in a circumferential array along the axis of the tunnel boring device 100 . The ends of the plurality of auxiliary propulsion members 160 located near the front shield 110 are fixedly connected to the front shield 110 , and the ends of the plurality of auxiliary propulsion members 160 located near the middle shield 120 are used to abut against the second propulsion assembly 150 when the second propulsion assembly 150 moves.

[0066] For example, as shown in FIG. 6 , the auxiliary propulsion members 160 may include three, and the three auxiliary propulsion members 160 are arranged in a circumferential array along the axis of the tunnel boring device 100 .

[0067] By including multiple auxiliary propulsion members 160, it is beneficial to increase the ultra-high thrust on the front shield 110 when transmitting force along the first mechanical force transmission path, thereby further quickly achieving the escape of the front shield 110 and ensuring normal excavation of the shield machine.

[0068] It should be noted that when there are multiple auxiliary propulsion members 160 , the specific arrangement method and arrangement position of the multiple auxiliary propulsion members 160 are not further limited, and can be specifically designed according to the distribution angle of the second propulsion cylinder 153 .

[0069] In one possible implementation, an elastic member 170 may be further included, and the elastic member 170 is disposed between the auxiliary propulsion member 160 and the second propulsion assembly 150. Thus, when the front shield 110 is stuck, the second end 152 of the second propulsion assembly moves in a direction approaching the auxiliary propulsion member 160, and the second end 152 of the second propulsion assembly is pressed against the second end 162 of the auxiliary propulsion member via the elastic member 170.

[0070] Exemplarily, the elastic member 170 can be a rubber pad or a silicone pad. By setting the rubber pad or the silicone pad, the rubber pad or the silicone pad is relatively soft and elastic, so that when the shield machine is performing curved excavation and when a certain angle is generated between the second propulsion assembly 150 and the auxiliary propulsion member 160, the use of the rubber pad or the silicone pad can maximize the contact area between the second propulsion assembly 150 and the auxiliary propulsion member 160, so that the second propulsion assembly 150 and the auxiliary propulsion member 160 are better attached and help to effectively reduce stress concentration.

[0071] Stress concentration refers to the uneven distribution of stress within an object's internal materials when subjected to external forces. This phenomenon can cause higher stress levels in localized areas of the object, increasing the risk of failure. Therefore, reducing stress concentration can effectively improve structural rigidity.

[0072] In a possible implementation, the connection method between the elastic member 170 and the auxiliary propulsion member 160 is not further limited.

[0073] For example, the elastic member 170 and the auxiliary propulsion member 160 can be connected by bonding, or the elastic member 170 and the auxiliary propulsion member 160 can be connected by other means. After the elastic member 170 and the auxiliary propulsion member 160 are connected, they can be reinforced with a cable tie or steel wire to improve the assembly stability of the elastic member 170 and the auxiliary propulsion member 160.

[0074] In addition, there is no further limitation on the connection method between the auxiliary propulsion member 160 and the front shield 110. For example, the auxiliary propulsion member 160 and the front shield 110 can be fixedly connected by any one of threaded connection, clamping or welding.

[0075] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0076] In the description of this application, it should be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or are inherent to these processes, methods, products or apparatuses.

[0077] Unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," "fixed," etc. should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration. They can be directly connected or indirectly connected through an intermediate medium. They can also refer to internal connections between two elements or interactions between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A tunnel boring device, characterized in that: It comprises a front shield, a middle shield and a tail shield, wherein the front shield is located at a side of the tunnel boring device close to the boring end, the tail shield is located at a side of the tunnel boring device away from the boring end, and the middle shield is connected between the front shield and the tail shield; The tunnel boring device is provided with a first propulsion assembly, a second propulsion assembly and at least one auxiliary propulsion member inside, wherein the first end of the first propulsion assembly is connected to the front shield, the second end of the first propulsion assembly is connected to the middle shield, and the second propulsion assembly and the first propulsion assembly are arranged side by side along the radial direction of the tunnel boring device; The auxiliary propulsion member is located between the front shield and the second propulsion assembly, the first end of the auxiliary propulsion member is fixedly connected to the front shield, and the second end of the auxiliary propulsion member is located on a side close to the second propulsion assembly. When the front shield is stuck, the second propulsion assembly moves along the excavation direction so that the second end of the second propulsion assembly contacts and presses against the auxiliary propulsion member, thereby pushing the front shield to free the front shield.

2. The tunnel boring device according to claim 1, characterized in that: The auxiliary propulsion members include a plurality of auxiliary propulsion members, which are arranged in a circular array along the axis of the tunnel boring device. The ends of the plurality of auxiliary propulsion members located near the front shield are fixedly connected to the front shield, and the ends of the plurality of auxiliary propulsion members located near the middle shield are used to press against the second propulsion assembly when the second propulsion assembly moves along the boring direction.

3. The tunnel boring device according to claim 1, characterized in that: The auxiliary propulsion members include a plurality of auxiliary propulsion members connected along the axial direction from the front shield to the middle shield. The auxiliary propulsion member located near the front shield is fixedly connected to the front shield, and the auxiliary propulsion member located near the middle shield is used to press against the second propulsion assembly when the second propulsion assembly moves along the excavation direction.

4. The tunnel boring device according to any one of claims 1 to 3, characterized in that: The second propulsion assembly includes a second propulsion cylinder; the second end of the auxiliary propulsion member is located on a side close to the second propulsion cylinder, and when the front shield is stuck, the second propulsion cylinder moves along the excavation direction and presses against the auxiliary propulsion member.

5. The tunnel boring device according to claim 4, characterized in that: The second propulsion assembly further comprises a gripper shoe connected to the first end of the second propulsion cylinder, and the interior of the tunnel boring device is lined with a segment; When the front shield is stuck, the support shoe moves in a direction away from the auxiliary propulsion member and abuts against the pipe segment, so that the second propulsion cylinder moves in a direction close to the auxiliary propulsion member and abuts against the auxiliary propulsion member.

6. The tunnel boring device according to claim 5, characterized in that: It also includes a hydraulic pump station, which is connected to the second propulsion cylinder. The hydraulic pump station is used to provide ultra-high pressure hydraulic oil to the second propulsion cylinder when the front shield is stuck, so as to drive the piston rod in the second propulsion cylinder to extend.

7. The tunnel boring device according to any one of claims 1 to 3, characterized in that: It also includes an elastic member, which is arranged between the auxiliary propulsion member and the second propulsion assembly, and the second end of the second propulsion assembly is pressed against the auxiliary propulsion member through the elastic member.

8. The tunnel boring device according to any one of claims 1 to 3, characterized in that: The first propulsion assembly includes a first propulsion cylinder, and two ends of the first propulsion cylinder are respectively connected to the front shield and the middle shield.

9. The tunnel boring device according to claim 7, characterized in that: The auxiliary propulsion member is a columnar rigid support seat or a cylindrical rigid support seat; and / or the elastic member is a rubber pad; The elastic member is connected to the auxiliary propulsion member by bonding; and / or the auxiliary propulsion member is connected to the front shield by any one of threaded connection, clamping or welding.

10. A tunnel boring machine, characterized in that: At least comprising an excavation device, a slag discharge device and a tunnel boring device as described in any one of claims 1 to 9; The excavation device is arranged at the excavation end of the tunnel excavation device, and the excavation device is used to excavate the tunnel stratum. The slag discharge device is connected to the excavation device, and the slag discharge device is used to discharge the slag excavated by the excavation device to the outside of the tunnel.

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