Water plugging device for heading machine and heading machine

Abstract

This invention provides a water-blocking device for a tunneling machine and a tunneling machine in the field of tunneling equipment technology. The water-blocking device for the tunneling machine includes a fixing member for fixing to the bottom of the shield body. A sealing member for sealing the gap between the bottom of the shield body and the tunnel wall is installed on the fixing member. The sealing member has a contact surface for contacting the tunnel wall. The water-blocking device also includes a control structure connected to the sealing member to control the contact surface's contact or detachment from the tunnel wall. The contact surface of the sealing member can seal the gap between the bottom of the shield body and the tunnel wall, preventing water from seeping into the tunnel, flowing water behind the tunnel, or water used for construction from flowing to the front of the shield body and mixing with the excavated rock. This prevents the excavated rock transported to the conveyor belt from having excessive moisture content, causing transportation difficulties and ensuring the normal excavation function of the conveyor belt. Excavation is not required by manual assistance, saving manpower and time. The contact surface of the sealing member can also detach from the tunnel wall, facilitating the tunneling machine's forward movement and avoiding excessive friction that could affect its service life.

Description

Technical Field

[0001] This invention relates to a water-blocking device for a tunneling machine and a tunneling machine, belonging to the technical field of tunneling equipment. Background Technology

[0002] Tunnel boring machines (TBMs) are construction equipment used for excavating tunnels. The bottom of the TBM shield is typically equipped with wear-resistant strips to increase its abrasion resistance. For example, Chinese utility model patent CN218206691U discloses a TBM main unit and a TBM itself. The main unit includes a front shield and a support shield, both of which have wear-resistant plates welded and fixed to their bottoms. Multiple wear-resistant plates are arranged at intervals along the circumference of the shield. During tunneling, the shield moves forward, and the wear-resistant plates come into contact with the tunnel wall. Due to the intervals between the wear-resistant plates, many gaps inevitably exist between the bottom of the shield and the tunnel wall.

[0003] When tunnel boring machines are operating, they are often in a water environment, especially during downhill tunneling. Water generated from tunnel seepage, water flowing behind the tunnel, and construction water flows along the tunnel slope in the direction of excavation. This causes the excavated rock to often mix with the accumulated water. When the excavated rock is transported onto the conveyor belt, it inevitably carries water, which reduces the friction of the excavated rock on the conveyor belt and makes transportation difficult. In severe cases, manual assistance is required to remove the excavated rock, which is time-consuming and labor-intensive. Summary of the Invention

[0004] The purpose of this invention is to provide a water-blocking device for tunneling machines to solve the problem in the prior art where water generated behind the tunnel flows through the gap between the bottom of the shield and the tunnel wall to the front of the shield and mixes with the slag, resulting in excessive moisture content in the slag transported to the conveyor belt, which in turn reduces the friction of the slag on the conveyor belt and makes transportation difficult; the purpose of this invention is also to provide a tunneling machine to solve the above problems.

[0005] To achieve the above objectives, the water-blocking device for tunneling machines in this invention adopts the following technical solution:

[0006] A water-blocking device for a tunneling machine includes a fixing member for fixing to the bottom of the shield body, a sealing member for sealing the gap between the bottom of the shield body and the tunnel wall, the sealing member having a contact surface for contacting the tunnel wall, and a control structure connected to the sealing member to control the contact surface to contact or detach from the tunnel wall.

[0007] The beneficial effects of the above technical solution are as follows: This invention innovatively proposes a water-blocking device for tunneling machines. This device includes a fixing component, a sealing component, and a control structure. The fixing component facilitates fixing the device to the bottom of the shield body. The sealing component has a contact surface. The control structure is connected to the sealing component and can control the contact surface to contact the tunnel wall, thereby sealing the gap between the bottom of the shield body and the tunnel wall. This prevents water from seeping into the tunnel, flowing water behind the tunnel, or water used during construction from flowing to the front of the shield body and mixing with the excavated rock. This, in turn, prevents the excavated rock transported to the conveyor belt from having excessive moisture content, thus preventing reduced friction on the conveyor belt and ensuring normal excavation function. No manual assistance is required for excavation, saving manpower and time. Furthermore, the control structure can also control the contact surface to detach from the tunnel wall, facilitating the tunneling machine's forward movement. Simultaneously, since the sealing component does not contact the tunnel wall, there is no friction, increasing the service life of the sealing component.

[0008] Furthermore, the fastener is provided with a mounting groove facing downwards for installing the sealing component, and the contact surface of the sealing component is retracted into the mounting groove after detaching from the hole wall.

[0009] The beneficial effects of the above technical solution are as follows: setting up an installation groove facilitates the installation of the sealing component, provides protection for the sealing component, and especially ensures that the contact surface of the sealing component is retracted into the installation groove after detaching from the hole wall, thus avoiding exposure and wear, and guaranteeing the service life of the sealing component.

[0010] Furthermore, the fastener includes a front end plate, a rear end plate, and a top plate connected between the front end plate and the rear end plate. The front end plate, the rear end plate, or the top plate is provided with a fixing structure for fixing to the bottom of the shield body. The mounting groove is formed by the front end plate, the rear end plate, and the top plate.

[0011] The advantages of the above technical solution are: it facilitates the processing and manufacturing of fasteners, and also facilitates the formation of mounting grooves.

[0012] Furthermore, one of the front-end board and the rear-end board has a higher section than the other, and the fixing structure is disposed on the higher section.

[0013] The advantages of the above technical solution are: it facilitates the setting of the fixing structure and the fixing of the fasteners to the shield body.

[0014] Furthermore, stiffening ribs are fixed between the elevated section and the top plate.

[0015] The beneficial effect of the above technical solution is that it improves the overall structural strength of the fastener.

[0016] Furthermore, the sealing element is a flexible sealing element.

[0017] The beneficial effects of the above technical solution are that the elastic sealing component can undergo elastic deformation, thereby better adapting to the shape of the hole wall, compensating for pits or containing protrusions.

[0018] Furthermore, the sealing component is an airbag that is fitted into the mounting groove, and the control structure is an air nozzle connected to the airbag and used for inflation and deflation.

[0019] The advantages of the above technical solution are as follows: the airbag is simple in form and can undergo elastic deformation, better adapting to the shape of the cave wall, compensating for pits or containing protrusions; at the same time, the control structure is set as an air nozzle, which allows the contact surface to extend to contact the cave wall or retract to detach from the cave wall by inflating and deflating the airbag, making control relatively convenient.

[0020] Furthermore, the front and rear outer side walls of the airbag are respectively provided with slots, and the front and rear side walls of the mounting groove are respectively provided with clips that can be inserted into the corresponding slots.

[0021] The advantages of the above technical solution are: it facilitates the installation of airbags and ensures the fixation effect of airbags.

[0022] Furthermore, the sealing component extends in an arc shape, and the bottom surfaces of both the front and rear plates are arc-shaped surfaces designed to fit the bottom of the cylindrical shield.

[0023] The beneficial effects of the above technical solution are that the shape of the sealing component and the bottom surfaces of the front and rear plates are all adapted to the bottom of the cylindrical shield, which can achieve a better sealing effect.

[0024] To achieve the above objectives, the tunneling machine in this invention adopts the following technical solution:

[0025] A tunneling machine includes a shield body and a water-blocking device fixed to the bottom of the shield body. The water-blocking device includes a fixing member for fixing to the bottom of the shield body, and a sealing member for sealing the gap between the bottom of the shield body and the tunnel wall is installed on the fixing member. The sealing member has a contact surface for contacting the tunnel wall. The water-blocking device also includes a control structure connected to the sealing member to control the contact surface to contact or detach from the tunnel wall.

[0026] The beneficial effects of the above technical solution are as follows: This invention improves upon existing tunneling machines by adding a water-blocking device to the bottom of the shield. This device includes a fixing component, a sealing component, and a control structure. The fixing component facilitates fixing the device to the bottom of the shield, the sealing component has a contact surface, and the control structure is connected to the sealing component, allowing control of the contact surface's contact with the tunnel wall. This seals the gap between the bottom of the shield and the tunnel wall, preventing water from seeping into the tunnel, flowing water behind the tunnel, or water used during construction from mixing with the excavated rock in front of the shield. This, in turn, prevents excessive moisture content in the excavated rock transported to the conveyor belt, avoiding reduced friction on the conveyor belt and ensuring normal excavation function. Excavation is handled without manual assistance, saving manpower and time. Furthermore, the control structure can also control the contact surface to detach from the tunnel wall, facilitating the tunneling machine's forward movement. Simultaneously, since the sealing component does not contact the tunnel wall, there is no friction, increasing the service life of the sealing component.

[0027] Furthermore, the fastener is provided with a mounting groove facing downwards for installing the sealing component, and the contact surface of the sealing component is retracted into the mounting groove after detaching from the hole wall.

[0028] The beneficial effects of the above technical solution are as follows: setting up an installation groove facilitates the installation of the sealing component, provides protection for the sealing component, and especially ensures that the contact surface of the sealing component is retracted into the installation groove after detaching from the hole wall, thus avoiding exposure and wear, and guaranteeing the service life of the sealing component.

[0029] Furthermore, the fastener includes a front end plate, a rear end plate, and a top plate connected between the front end plate and the rear end plate. The front end plate, the rear end plate, or the top plate is provided with a fixing structure for fixing to the bottom of the shield body. The mounting groove is formed by the front end plate, the rear end plate, and the top plate.

[0030] The advantages of the above technical solution are: it facilitates the processing and manufacturing of fasteners, and also facilitates the formation of mounting grooves.

[0031] Furthermore, one of the front-end board and the rear-end board has a higher section than the other, and the fixing structure is disposed on the higher section.

[0032] The advantages of the above technical solution are: it facilitates the setting of the fixing structure and the fixing of the fasteners to the shield body.

[0033] Furthermore, stiffening ribs are fixed between the elevated section and the top plate.

[0034] The beneficial effect of the above technical solution is that it improves the overall structural strength of the fastener.

[0035] Furthermore, the sealing element is a flexible sealing element.

[0036] The beneficial effects of the above technical solution are that the elastic sealing component can undergo elastic deformation, thereby better adapting to the shape of the hole wall, compensating for pits or containing protrusions.

[0037] Furthermore, the sealing component is an airbag that is fitted into the mounting groove, and the control structure is an air nozzle connected to the airbag and used for inflation and deflation.

[0038] The advantages of the above technical solution are as follows: the airbag is simple in form and can undergo elastic deformation, better adapting to the shape of the cave wall, compensating for pits or containing protrusions; at the same time, the control structure is set as an air nozzle, which allows the contact surface to extend to contact the cave wall or retract to detach from the cave wall by inflating and deflating the airbag, making control relatively convenient.

[0039] Furthermore, the front and rear outer side walls of the airbag are respectively provided with slots, and the front and rear side walls of the mounting groove are respectively provided with clips that can be inserted into the corresponding slots.

[0040] The advantages of the above technical solution are: it facilitates the installation of airbags and ensures the fixation effect of airbags.

[0041] Furthermore, the sealing component extends in an arc shape, and the bottom surfaces of both the front and rear plates are arc-shaped surfaces designed to fit the bottom of the cylindrical shield.

[0042] The beneficial effects of the above technical solution are that the shape of the sealing component and the bottom surfaces of the front and rear plates are all adapted to the bottom of the cylindrical shield, which can achieve a better sealing effect. Attached Figure Description

[0043] Figure 1 This is a side view of the tunneling machine in this invention;

[0044] Figure 2 for Figure 1 Enlarged view of the bottom center;

[0045] Figure 3 for Figure 1 Sectional view along line AA in the middle;

[0046] Figure 4 for Figure 3 Enlarged view of the central fixing component and airbag section;

[0047] Figure 5 for Figure 4 The diagram shows the state of the airbag's contact surface when it comes into contact with the cave wall.

[0048] In the diagram: 1. Shield body; 11. Wear-resistant plate; 2. Fastener; 21. Front end plate; 211. Elevated section; 22. Rear end plate; 23. Top plate; 24. Rib plate; 241. Lifting hole; 3. Airbag; 31. Contact surface; 4. Clip; 5. Screw; 6. Tunnel wall; 7. Air nozzle; 8. Pressure valve. Detailed Implementation

[0049] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0050] Embodiment 1 of the tunneling machine in this invention: This embodiment adds a water-blocking device to the bottom of the shield body. The water-blocking device includes an airbag. Utilizing the inflatable property of the airbag, the bottom surface of the airbag contacts the tunnel wall, sealing the gap between the bottom of the shield body and the tunnel wall, preventing water from flowing to the front of the shield body and mixing with the slag. At the same time, utilizing the deflated property of the airbag, the contact surface of the airbag retracts into the fixing component, facilitating the tunneling machine's forward movement, reducing unnecessary friction between the airbag and the tunnel wall, and improving the service life of the airbag.

[0051] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the tunnel boring machine includes a shield body 1, which provides support and protection for the machine. Wear-resistant plates 11 are welded and fixed to the bottom of the shield body 1. Multiple wear-resistant plates 11 are arranged at intervals along the circumference of the shield body 1. During tunneling, the shield body 1 moves forward, and the wear-resistant plates 11 contact the tunnel wall 6. Due to the intervals between the wear-resistant plates 11, many gaps inevitably exist between the bottom of the shield body 1 and the tunnel wall 6. To prevent water from seeping into the tunnel, flowing water behind the tunnel, or water generated during construction from flowing along the tunnel slope through these gaps in the direction of tunneling, thus avoiding frequent mixing of rock debris and accumulated water, this invention adds a water-blocking device to the rear side of the bottom of the shield body 1. The water-blocking device includes a fixing member 2 fixed to the bottom of the shield body 1, and a sealing member for sealing the gaps between the bottom of the shield body 1 and the tunnel wall 6 is installed on the fixing member 2.

[0052] like Figure 4 As shown, the sealing component in this embodiment is an elastic airbag 3, which provides pressure bearing and water blocking functions. The fixing component 2 is provided with a mounting groove facing downwards for installing the airbag 3, providing a positioning function for the airbag 3. Specifically, the fixing component 2 includes a front plate 21, a rear plate 22, and a top plate 23 connected between the front plate 21 and the rear plate 22. The mounting groove is formed by the front plate 21, the rear plate 22, and the top plate 23. The airbag 3 is fitted into the mounting groove. Specifically, the front and rear outer sidewalls of the airbag 3 are respectively provided with slots, and the front and rear sidewalls of the mounting groove (i.e., the inner sidewalls of the front plate 21 and the rear plate 22) are respectively provided with locking strips 4 that fit into the corresponding slots to fix the airbag 3 and prevent the airbag 3 from falling out of the mounting groove.

[0053] The airbag 3 has a cavity with an approximately trapezoidal cross-sectional shape, while the airbag 3 has an approximately rectangular cross-sectional shape. The airbag 3 has a contact surface 31 for contacting the cave wall 6. The water-blocking device also includes a control structure connected to the airbag 3 to control the contact surface 31's contact with or separation from the cave wall 6, such as... Figure 1 and Figure 2 As shown, the control structure in this embodiment is an air nozzle 7 connected to the airbag 3 for inflation and deflation. Utilizing the inflatable and deflated characteristics of the airbag 3, the airbag 3 is inflated (e.g., when inflated)... Figure 5 As shown, the contact surface 31 contacts the tunnel wall 6. Under a certain pressure, it seals the gap between the tunneling machine and the tunnel wall 6, preventing the water flow from passing through and thus playing a water-blocking role. This prevents the water from flowing to the front of the shield and mixing with the slag, which would result in excessive moisture content and reduced friction in the slag transported to the belt conveyor, thus making transportation difficult. This ensures the normal slag transport function of the belt conveyor and eliminates the need for manual assistance in slag removal, saving manpower and time.

[0054] Furthermore, the airbag 3 can undergo elastic deformation, allowing it to better adapt to the shape of the tunnel wall, compensating for pits or containing protrusions, thus achieving a better sealing effect. Simultaneously, in this embodiment, the airbag 3 extends in an arc shape, meaning the entire mounting groove extends in an arc shape. The bottom surfaces of the front end plate 21 and the rear end plate 22 are both arc-shaped surfaces designed to fit the bottom of the cylindrical shield. The entire water-blocking device is fixed to the lower part of the shield, blocking a certain height of water behind the shield, thus facilitating the use of a water pump for treatment.

[0055] At the same time, such as Figure 4 As shown, when the airbag 3 is not inflated, the contact surface 31 is located in the mounting groove and does not contact the tunnel wall 6. In other words, when the airbag 3 deflates, the contact surface 31 retracts into the mounting groove after detaching from the tunnel wall 6, and does not contact the tunnel wall 6. This facilitates the tunneling machine's forward movement and, since there is no friction between the airbag 3 and the tunnel wall 6, increases the service life of the airbag 3. Additionally, a pressure valve 8 is installed on the air nozzle 7. The air nozzle 7 can be connected to the tunneling machine's compressed air pipeline, and the pressure valve 8 is used to control inflation / deflation and airbag pressure. It can be manually controlled or connected to a host computer for automatic control.

[0056] In addition, such as Figure 2 and Figure 4 As shown, the front end plate 21 has a protruding section 211 that is higher than the rear end plate 22. To facilitate fixing the fastener 2 to the bottom of the shield body 1, a fixing structure for fixed connection to the bottom of the shield body 1 is provided on the protruding section 211. In this embodiment, the protruding section 211 is fixed to the bottom of the shield body 1 by screws 5, so the above-mentioned fixing structure is a screw hole for the screws 5 to pass through. A stiffening plate 24 is fixed between the protruding section 211 and the top plate 23, which improves the strength of the fastener 2. The stiffening plate 24 is provided with a lifting hole 241 to facilitate the installation of the fastener 2 using a lifting tool.

[0057] In other embodiments of the tunneling machine: the method of fixing the airbag is not limited to the form of slots and strips. For example, the airbag can be directly fixed in the mounting slot by screws. In this case, there is no need to set a slot on the airbag and no need to set a strip in the mounting slot.

[0058] In other embodiments of the tunneling machine: the shape of the airbag can be changed, for example, the cross-sectional shape of both the airbag and the cavity can be circular; or the rubber surface of the airbag in contact with the tunnel wall can be locally arranged with protrusions to increase the contact pressure with the tunnel wall.

[0059] In other embodiments of the tunneling machine: when the sealing component is an elastic sealing component, the specific form of the elastic sealing component can be changed. For example, a rubber block can be used as the elastic sealing component. In this case, in order to achieve contact or separation between the contact surface on the rubber block and the tunnel wall, the control structure needs to be set as a cylinder, hydraulic cylinder or electric actuator connected to the rubber block to directly drive the rubber block to move.

[0060] In other embodiments of the tunnel boring machine: the overall shape of the sealing component can also be adapted to different tunnel cross sections and shield shapes.

[0061] In other embodiments of the tunneling machine: depending on the overall structural strength of the fasteners, stiffening plates may no longer be needed between the elevated section and the top plate.

[0062] In other embodiments of the tunneling machine: the fixing structure on the elevated section can also be rivet holes. Of course, in other embodiments, the fixing structure can also be a pre-machined welded surface, with the fixing element welded to the bottom of the shield.

[0063] In other embodiments of the tunneling machine: the raised section can be set on the rear end plate. In this case, the fixing member is fixed to the front side of the bottom of the shield body through the fixing structure on the raised section, which can also prevent the water behind from flowing to the front side of the shield body through the gap.

[0064] In other embodiments of the tunneling machine: whether it is the front plate or the rear plate, the high-extension section is no longer required. Instead, the fixing structure is set on the top plate. For example, the fixing structure is an L-shaped fixing plate welded to the top plate, and the L-shaped fixing plate is then welded to the bottom of the shield body.

[0065] In other embodiments of the tunneling machine: the fastener may not be formed by the combination of the front end plate, the rear end plate and the top plate, but by using a fastener block as the fastener. In this case, the mounting groove can be machined on the fastener block by removing material.

[0066] In other embodiments of the tunneling machine: the fixing component may not have an installation groove, and the sealing component is not installed in the installation groove. The fixing component may simply be a fixing plate. For example, when the sealing component is an airbag, the side of the airbag can be glued to the surface of the fixing plate. When the airbag is inflated, the contact surface moves down to contact the tunnel wall. When the airbag is not inflated or deflated, the contact surface retracts to the top of the bottom surface of the fixing plate to avoid contact with the tunnel wall. Alternatively, when the sealing component is a rubber block, the fixing component does not need to have an installation groove. The fixing component is only used to fix the control structure (such as a cylinder, hydraulic cylinder, or electric actuator). The control structure only needs to be connected to the rubber block to control the movement of the rubber block.

[0067] In other embodiments of the tunneling machine: when the tunnel wall surface is relatively regular and there are not many depressions or protrusions, the sealing component can be a rigid sealing component.

[0068] The embodiment of the water-blocking device for tunneling machines in this invention is as follows: The specific structure of the water-blocking device for tunneling machines is the same as that of the water-blocking device in any of the above embodiments of the tunneling machine, and will not be repeated here.

[0069] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A water-blocking device for a tunneling machine, characterized in that, The device includes a fixing member (2) for fixing the bottom of the shield (1) for downslope tunneling. The fixing member (2) is equipped with a sealing member for sealing the gap between the bottom of the shield (1) and the tunnel wall (6). The sealing member is an airbag. The fixing member is provided with an installation groove with the slot facing down for installing the airbag. Both the installation groove and the airbag extend in an arc shape to fit the bottom of the cylindrical shield. The airbag has a contact surface (31) for contacting the tunnel wall (6) to seal a certain height of water behind the shield, thereby facilitating the use of a water pump for water treatment. The water blocking device for the tunneling machine also includes a control structure connected to the airbag for inflation or deflation to control the contact surface (31) to contact or detach from the tunnel wall (6).

2. The water-blocking device for a tunneling machine according to claim 1, characterized in that, The contact surface (31) of the sealing element can be retracted into the installation groove after it is detached from the hole wall (6).

3. The water-blocking device for a tunneling machine according to claim 2, characterized in that, The fastener (2) includes a front end plate (21), a rear end plate (22), and a top plate (23) connected between the front end plate (21) and the rear end plate (22). The front end plate (21), the rear end plate (22), or the top plate (23) is provided with a fixing structure for fixing to the bottom of the shield body (1). The mounting groove is formed by the front end plate (21), the rear end plate (22), and the top plate (23).

4. The water-blocking device for a tunneling machine according to claim 3, characterized in that, One of the front end plate (21) and the rear end plate (22) has a higher section (211) than the other, and the fixing structure is disposed on the higher section (211).

5. The water-blocking device for a tunneling machine according to claim 4, characterized in that, A stiffening plate (24) is fixed between the elevated section (211) and the top plate (23).

6. The water-blocking device for a tunneling machine according to any one of claims 3 to 5, characterized in that, The fixing structure is a screw hole for the screw to pass through.

7. The water-blocking device for a tunneling machine according to any one of claims 1 to 5, characterized in that, The control structure is an air nozzle (7).

8. The water-blocking device for a tunneling machine according to any one of claims 1 to 5, characterized in that, The airbag is installed in the mounting slot. The front and rear outer walls of the airbag (3) are respectively provided with slots, and the front and rear side walls of the mounting slot are respectively provided with clips (4) that can be inserted into the corresponding slots.

9. The water-blocking device for a tunneling machine according to any one of claims 3 to 5, characterized in that, The bottom surfaces of the front end plate (21) and the rear end plate (22) are both arc-shaped surfaces designed to fit the bottom of the cylindrical shield body (1).

10. A tunneling machine, comprising a shield (1) for downhill tunneling, characterized in that, It also includes a water-blocking device fixed to the bottom of the shield body (1). The water-blocking device includes a fixing member (2) fixed to the bottom of the shield body (1). A sealing member for sealing the gap between the bottom of the shield body (1) and the tunnel wall (6) is installed on the fixing member (2). The sealing member is an airbag. The fixing member is provided with an installation groove with the slot facing down for installing the airbag. Both the installation groove and the airbag extend in an arc shape to fit the bottom of the cylindrical shield body. The airbag has a contact surface (31) for contacting the tunnel wall (6) to block a certain height of water behind the shield body, thereby facilitating the use of a water pump for water treatment. The water-blocking device for tunneling machines also includes a control structure connected to the airbag for inflation or deflation to control the contact surface (31) to contact or detach from the tunnel wall (6).

11. The tunneling machine according to claim 10, characterized in that, The contact surface (31) of the sealing element can be retracted into the installation groove after it is detached from the hole wall (6).

12. The tunneling machine according to claim 11, characterized in that, The fastener (2) includes a front end plate (21), a rear end plate (22), and a top plate (23) connected between the front end plate (21) and the rear end plate (22). The front end plate (21), the rear end plate (22), or the top plate (23) is provided with a fixing structure for fixing to the bottom of the shield body (1). The mounting groove is formed by the front end plate (21), the rear end plate (22), and the top plate (23).

13. The tunneling machine according to claim 12, characterized in that, One of the front end plate (21) and the rear end plate (22) has a higher section (211) than the other, and the fixing structure is disposed on the higher section (211).

14. The tunneling machine according to claim 13, characterized in that, A stiffening plate (24) is fixed between the elevated section (211) and the top plate (23).

15. The tunneling machine according to any one of claims 12 to 14, characterized in that, The fixing structure is a screw hole for the screw to pass through.

16. The tunneling machine according to any one of claims 10 to 14, characterized in that, The control structure is an air nozzle (7).

17. The tunneling machine according to any one of claims 10 to 14, characterized in that, The airbag is installed in the mounting slot. The front and rear outer walls of the airbag (3) are respectively provided with slots, and the front and rear side walls of the mounting slot are respectively provided with clips (4) that can be inserted into the corresponding slots.

18. The tunneling machine according to any one of claims 12 to 14, characterized in that, The bottom surfaces of the front end plate (21) and the rear end plate (22) are both arc-shaped surfaces designed to fit the bottom of the cylindrical shield body (1).

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