A waterproof structure for supporting the tail of a shield

Abstract

This application provides a waterproof structure for the tail of a tunnel boring machine (TBM), relating to the field of tunnel boring construction technology. The waterproof structure includes: a flow-blocking mechanism comprising a flow-blocking plate; and a moving mechanism located at the end of the TBM furthest from the cutterhead, with its moving end connected to the flow-blocking plate. This moving mechanism drives the flow-blocking plate to rise and fall relative to the TBM, switching the flow-blocking plate between a retracted state and a flow-blocking state. In the retracted state, the flow-blocking plate retracts into the TBM; in the flow-blocking state, the flow-blocking plate extends out of the TBM and abuts against the tunnel wall. The waterproof structure for the tail of the TBM provided by this application can prevent water from flowing back along the gap between the TBM and the tunnel wall to the front of the cutterhead.

Description

Technical Field

[0001] This application relates to the field of tunnel excavation construction technology, and in particular to a waterproof structure for supporting the tail of a shield. Background Technology

[0002] A tunnel boring machine (TBM) is a type of tunnel construction machinery that uses rotating cutters to excavate, break the surrounding rock, and excavate to form the entire tunnel cross-section. It mainly includes a cutterhead, a telescopic shield, and a support shield. The support shield, also known as the tension shield, is the core part of the TBM and is generally located behind the cutterhead to provide support for the cutterhead during the tunnel boring machine's excavation process.

[0003] Currently, the existing support shield is a welded structure, including a horizontal support mechanism set in the middle of the support shield and a steel structure support wrapped with steel plates. The horizontal support mechanism is used to maintain the support state with the tunnel wall and ensure the stable excavation of the cutterhead.

[0004] However, when the aforementioned tunnel boring machine operates in mine roadways with slag soil, especially downhill sections, the water inside the tunnel will flow back through the gap between the shield and the tunnel wall to the front of the cutterhead. This causes the mud-water mixture to stick to the cutterhead when it rotates, thus affecting the normal operation of the tunnel boring machine. Summary of the Invention

[0005] In view of this, this application provides a waterproof structure for supporting the tail of the shield to prevent water from flowing back to the front of the cutterhead along the gap between the supporting shield and the tunnel wall.

[0006] To achieve the above objectives, this application provides a waterproof structure for supporting the tail of a shield, employing the following technical solution:

[0007] This application provides a structure for supporting the waterproof tail of a shield, including a flow-blocking mechanism, wherein the flow-blocking mechanism includes a flow-blocking plate;

[0008] A moving mechanism is provided, which is located on the lower end face of the support shield away from the cutter head. The moving end of the moving mechanism is connected to the flow-blocking plate to drive the flow-blocking plate to rise and fall relative to the support shield, so that the flow-blocking plate switches between a retracted state and a flow-blocking state. In the retracted state, the flow-blocking plate is retracted into the support shield; in the flow-blocking state, the flow-blocking plate extends out of the support shield and abuts against the tunnel wall to prevent water from flowing back to the front of the cutter head through the gap between the support shield and the tunnel wall.

[0009] In one possible implementation, the flow deflector includes a first flow deflector and a second flow deflector, the first flow deflector being connected to the moving end of the moving mechanism, and the second flow deflector being detachably connected to the end of the first flow deflector away from the moving mechanism.

[0010] In one possible implementation, the flow-blocking mechanism further includes a first connector;

[0011] The first flow barrier has a first through hole, and the second flow barrier has a second through hole. The first connector is inserted into the first through hole and the second through hole to connect the first flow barrier and the second flow barrier.

[0012] In one possible implementation, a second connector is also included;

[0013] The flow-blocking plate has a third through hole, and the second connector is inserted into the third through hole to fix the flow-blocking plate to the support shield.

[0014] In one possible implementation, the third through hole is configured as an elongated hole extending along the moving direction of the baffle plate, and the first connector can be inserted into different positions within the elongated hole to accommodate the baffle plate fixed at different positions on the support shield.

[0015] One possible implementation also includes sandbags;

[0016] The end of the flow deflector away from the moving mechanism extends horizontally to form a placement platform, on which the sandbag is placed.

[0017] In one possible implementation, a support rib is provided at the connection between the flow barrier and the placement platform in the vertical direction.

[0018] In one possible implementation, the moving mechanism includes a moving rod, a first connecting platform, a second connecting platform, and a limiting block;

[0019] The first connecting platform is connected to the support shield, and a fourth through hole is provided on the first connecting platform. The second connecting platform is connected to the baffle plate, and a fifth through hole is provided on the second connecting platform. The moving rod is inserted into the fourth through hole and the fifth through hole, and a limiting block is provided at the end of the moving rod near the baffle plate so as to abut against the bottom of the second connecting platform, so as to drive the limiting block to move through the moving rod, thereby driving the baffle plate to rise and fall.

[0020] In one possible implementation, the moving rod is a threaded rod;

[0021] The fourth through hole is a threaded hole, and the moving rod is connected to the first connecting platform by a thread.

[0022] In one possible implementation, the moving mechanism further includes a turntable;

[0023] The turntable is inserted at the end of the movable rod near the support shield to drive the movable rod to rotate relative to the first connecting platform.

[0024] This application provides a waterproof structure for the tail of a tunnel boring machine (TBM), comprising a flow-blocking mechanism and a moving mechanism, wherein the flow-blocking mechanism includes a flow-blocking plate. When the TBM is tunneling horizontally or uphill, the moving mechanism raises the flow-blocking plate until it is completely retracted into the TBM, thus preventing unnecessary wear on the flow-blocking plate during tunneling. When the TBM is tunneling downhill, the moving mechanism lowers the flow-blocking plate, which extends beyond the TBM until its lower edge abuts against the tunnel wall. At this point, the flow-blocking plate seals the gap between the lower end of the TBM and the tunnel wall, thereby blocking the backflow channel of accumulated water and solving the problem of water flowing back into the cutterhead and causing it to stick to the cutterhead.

[0025] Therefore, by setting up flow-blocking and moving mechanisms, operators can adjust the position of the flow-blocking mechanism according to the working terrain by operating the moving mechanism, so that the environment around the cutterhead can be kept dry at all times during the tunnel boring machine's tunneling process, thus improving the safety of the tunnel boring machine's tunneling operation. Attached Figure Description

[0026] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0027] Figure 1 This is a schematic diagram illustrating the installation method of the waterproof structure for supporting the tail of the shield provided in an embodiment of this application;

[0028] Figure 2 for Figure 1 A schematic diagram of the structure of the first flow-blocking plate in the middle;

[0029] Figure 3 for Figure 1 Schematic diagram of the structure of the second flow barrier;

[0030] Figure 4 for Figure 1 A schematic diagram of the structure of China Mobile.

[0031] Explanation of reference numerals in the attached figures:

[0032] 100-Baffle plate;

[0033] 110 - First baffle plate;

[0034] 111 - First through hole; 112 - Third through hole;

[0035] 120 - Second baffle plate;

[0036] 121 - Second through hole;

[0037] 130 - Placement platform;

[0038] 140 - Supporting stiffener;

[0039] 200 - Moving mechanism;

[0040] 210 - Moving lever;

[0041] 220 - First Connection Platform;

[0042] 221 - Fourth through hole;

[0043] 230 - Second connection platform;

[0044] 231 - Fifth through hole;

[0045] 240 - Limit Block;

[0046] 250-turntable;

[0047] 300 - First connector;

[0048] 400 - Second connector;

[0049] 500-sandbags.

[0050] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application and how they solve the aforementioned technical problems will be clearly and completely described below with reference to specific embodiments and the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0052] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0053] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein.

[0055] In this application, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0056] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0057] A tunnel boring machine (TBM) is a type of tunnel construction machinery that uses rotating cutters to excavate, break the surrounding rock, and excavate to form the entire tunnel cross-section. It mainly includes a cutterhead, a telescopic shield, and a support shield. The support shield, also known as the tension shield, is the core part of the TBM and is generally located behind the cutterhead to provide support for the cutterhead during the tunnel boring machine's excavation process.

[0058] Currently, the existing tension shield is a welded structure, including a tension cylinder and two support shoes symmetrically arranged in the horizontal direction. The tension cylinder is used to drive the support shoes and keep them in a tensioned state with the tunnel wall.

[0059] However, when the aforementioned tunnel boring machine operates in mine roadways with slag soil, especially downhill sections, the water inside the tunnel will flow back through the gap between the shield and the tunnel wall to the front of the cutterhead. This causes the mud-water mixture to stick to the cutterhead when it rotates, thus affecting the normal operation of the tunnel boring machine.

[0060] Based on this, this application provides a waterproof structure for the tail of a tunnel boring machine (TBM), including a flow-blocking mechanism and a moving mechanism, wherein the flow-blocking mechanism includes a flow-blocking plate. When the TBM is tunneling horizontally or uphill, the moving mechanism raises the flow-blocking plate until it is completely retracted into the TBM, thereby avoiding unnecessary wear on the flow-blocking plate during the TBM's tunneling process. When the TBM is tunneling downhill, the moving mechanism lowers the flow-blocking plate, which extends beyond the TBM until its lower edge abuts against the tunnel wall. At this point, the flow-blocking plate seals the gap between the lower end of the TBM and the tunnel wall, thus blocking the backflow channel of accumulated water and solving the problem of water flowing back into the front of the cutterhead and causing it to stick to the cutterhead.

[0061] Therefore, by setting up flow-blocking and moving mechanisms, operators can adjust the position of the flow-blocking mechanism according to the working terrain by operating the moving mechanism, so that the environment around the cutterhead can be kept dry at all times during the tunnel boring machine's tunneling process, thus improving the safety of the tunnel boring machine's tunneling operation.

[0062] The technical solutions of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0063] Reference Figure 1 As shown in the embodiment of this application, a waterproof structure for the tail of a support shield includes a flow-blocking mechanism, which includes a flow-blocking plate 100 and a moving mechanism 200. The moving mechanism 200 is disposed on the lower end face of the support shield away from the cutter head, and the moving end of the moving mechanism 200 is connected to the flow-blocking plate 100 to drive the flow-blocking plate 100 to rise and fall relative to the support shield, so that the flow-blocking plate 100 switches between a retracted state and a flow-blocking state. In the retracted state, the flow-blocking plate 100 is retracted into the support shield; in the flow-blocking state, the flow-blocking plate 100 extends out of the support shield and abuts against the tunnel wall to prevent water from flowing back to the front of the cutter head along the gap between the support shield and the tunnel wall.

[0064] It should be noted that in this embodiment, the moving mechanism 200 is set on the lower end face of the support shield away from the cutterhead. Since the water accumulation is mainly composed of waste liquid from subsequent grouting operations, it will only flow in the gap between the lower end of the support shield and the tunnel wall. Therefore, it is not necessary to set it at other positions around the support shield.

[0065] In this application, when the tunnel boring machine is tunneling horizontally or uphill, the moving mechanism 200 raises the baffle plate 100 until it is completely retracted into the support shield, thereby avoiding unnecessary wear on the baffle plate 100 during tunneling. When the tunnel boring machine is tunneling downhill, the moving mechanism 200 is operated to lower the baffle plate 100, which extends beyond the support shield until its lower edge abuts against the tunnel wall. At this point, the baffle plate 100 seals the gap between the lower end of the support shield and the tunnel wall, thereby blocking the backflow channel of accumulated water and solving the problem of water flowing back into the cutterhead and causing it to stick to the cutterhead.

[0066] Therefore, by setting up the baffle plate 100 and the moving mechanism 200, the operator can adjust the position of the baffle plate 100 according to the working terrain by operating the moving mechanism 200, so that the environment around the cutterhead can be kept dry at all times during the tunnel boring machine's tunneling process, thus improving the safety of the tunnel boring machine's tunneling operation.

[0067] Reference Figures 1 to 3 As shown, in some embodiments, the baffle plate 100 includes a first baffle plate 110 and a second baffle plate 120. The first baffle plate 110 is connected to the moving end of the moving mechanism 200, and the second baffle plate 120 is detachably connected to the end of the first baffle plate 110 away from the moving mechanism 200.

[0068] Here, the baffle plate 100 is divided into a first baffle plate 110 and a second baffle plate 120, which allows the operator to choose different operations according to the actual situation when the tunnel boring machine is excavating in the horizontal or uphill direction: when the baffle plate 100 protrudes a large part, the operator can operate the moving mechanism 200 to lift the baffle plate 100 until the baffle plate 100 is completely retracted into the shield; when the baffle plate 100 protrudes a small part, since the second baffle plate 120 is detachably connected to the first baffle plate 110, the operator can directly remove the second baffle plate 120 without adjusting it through the moving mechanism 200, which facilitates the operator's daily operation.

[0069] In some embodiments, the flow-blocking mechanism further includes a first connector 300; a first through hole 111 is provided on the first flow-blocking plate 110, and a second through hole 121 is provided on the second flow-blocking plate 120. The first connector 300 is inserted into the first through hole 111 and the second through hole 121 to connect the first flow-blocking plate 110 and the second flow-blocking plate 120.

[0070] It is understood that in this application, there are no restrictions on the specific connection method between the first baffle plate 110 and the second baffle plate 120. It can be a snap-fit ​​connection or a connection via a connector, as long as the detachability between the first baffle plate 110 and the second baffle plate 120 can be ensured. Specifically, in this embodiment, the connection between the first baffle plate 110 and the second baffle plate 120 is set as a detachable connection using the first connector 300 as a bridge. Workers only need to remove the first connector 300 inserted into the first through hole 111 and the second through hole 121 to break the connection between the first baffle plate 110 and the second baffle plate 120, facilitating daily operations.

[0071] In some embodiments, a second connector 400 is also included; a third through hole 112 is provided on the baffle plate 100, and the second connector 400 is inserted into the third through hole 112 to fix the baffle plate 100 on the support shield.

[0072] In the above embodiment, when the operator uses the moving mechanism 200 to adjust the flow deflector 100 to a suitable position, the flow deflector 100 can be further reinforced by the second connecting member 400 to fix it to the support shield. When the flow deflector 100 is in the retracted state, it can prevent the flow deflector 100 from falling off due to vibration during the tunneling process; when the flow deflector 100 is in the flow-blocking state, it can prevent the position of the flow deflector 100 from shifting, causing a gap to form between the lower edge of the flow deflector 100 and the tunnel wall, resulting in poor flow blocking effect.

[0073] In some embodiments, the third through hole 112 is configured as an elongated hole extending along the moving direction of the baffle plate 100, and the first connector 300 can be inserted into different positions in the elongated hole to accommodate the baffle plate 100 fixed at different positions of the support shield.

[0074] Specifically, in this embodiment, the third through hole 112 is set as an elongated hole extending along the moving direction of the baffle plate 100, making the connection between the baffle plate 100 and the support shield more flexible. Even when facing baffle plates 100 at different positions, as long as the movement of the baffle plate 100 is not large, the baffle plates 100 at different positions can be fixed by changing the position of the first connector 300 in the third through hole 112, without the need to set multiple connection holes on the support shield.

[0075] In some embodiments, a sandbag 500 is also included; the end of the baffle plate 100 away from the moving mechanism 200 extends horizontally to form a placement platform 130, on which the sandbag 500 is placed.

[0076] In the above embodiment, the sandbag 500 can increase the pressure at the contact point between the lower edge of the baffle plate 100 and the cave wall, enhance the sealing performance at the contact point between the lower edge of the baffle plate 100 and the cave wall, and thus improve the flow obstruction capacity of the baffle plate 100.

[0077] In some embodiments, a support rib 140 is provided at the connection between the flow baffle 100 and the placement platform 130 in the vertical direction.

[0078] In the above embodiment, the support rib 140 is arranged vertically at the connection between the flow baffle 100 and the placement platform 130, which can improve the stability of the connection between the flow baffle 100 and the placement platform 130 and further improve the connection strength.

[0079] Reference Figure 4 As shown, in some embodiments, the moving mechanism 200 includes a moving rod 210, a first connecting platform 220, a second connecting platform 230, and a limiting block 240; the first connecting platform 220 is connected to the support shield, and a fourth through hole 221 is provided on the first connecting platform 220; the second connecting platform 230 is connected to the baffle plate 100, and a fifth through hole 231 is provided on the second connecting platform 230; the moving rod 210 is inserted into the fourth through hole 221 and the fifth through hole 231, and a limiting block 240 is provided at the end of the moving rod 210 near the baffle plate 100 so as to abut against the bottom of the second connecting platform 230, so that the moving rod 210 can drive the limiting block 240 to move, thereby driving the baffle plate 100 to rise and fall.

[0080] It is understood that the specific structure of the moving mechanism 200 is not limited in this application, as long as it can drive the baffle plate 100 to rise and fall. Specifically, in this embodiment, the moving mechanism 200 is configured as a combination of multiple parts such as a moving rod 210, a first connecting platform 220, a second connecting platform 230, and a limiting block 240. The moving rod 210 drives the baffle plate 100 to rise and fall, which is simple in structure and facilitates subsequent maintenance and repair of the moving mechanism 200 by the staff.

[0081] In some embodiments, the moving rod 210 is a threaded rod; the fourth through hole 221 is a threaded hole, and the moving rod 210 is connected to the first connecting platform 220 by threads.

[0082] It is understood that in this application, the specific connection structure between the moving rod 210 and the first connecting platform 220 is not limited, as long as the moving rod 210 can be limited and the moving rod 210 can be moved along the insertion direction. Specifically, in this embodiment, the moving rod 210 is set as a threaded rod, and the connection relationship between the moving rod 210 and the first connecting platform 220 is set as a threaded connection. With this setting, the threaded connection has the characteristics of self-locking and maintaining high precision, which can not only improve the stability of the baffle plate 100 in different states, but also make the movement of the moving rod 210 and the lifting and lowering of the baffle plate 100 more precise, avoiding the need for repeated adjustments by the staff during use and facilitating the daily operation of the staff.

[0083] In some embodiments, the moving mechanism 200 further includes a turntable 250; the turntable 250 is inserted into the end of the moving rod 210 near the support shield to drive the moving rod 210 to rotate relative to the first connecting platform 220.

[0084] In the above embodiment, a turntable 250 is provided to facilitate the operator to rotate the moving rod 210, thereby driving the baffle plate 100 to rise and fall.

[0085] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0086] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the principles of this application should be included within the scope of protection of this application.

Claims

1. A waterproof structure for supporting the tail of a shield, characterized in that, include: A flow-blocking mechanism, wherein the flow-blocking mechanism includes a flow-blocking plate; A moving mechanism is provided, which is located on the lower end face of the support shield away from the cutter head. The moving end of the moving mechanism is connected to the flow-blocking plate to drive the flow-blocking plate to rise and fall relative to the support shield, so that the flow-blocking plate switches between a retracted state and a flow-blocking state. In the retracted state, the flow-blocking plate is retracted into the support shield; in the flow-blocking state, the flow-blocking plate extends out of the support shield and abuts against the tunnel wall to prevent water from flowing back to the front of the cutter head along the gap between the support shield and the tunnel wall. The flow baffle includes a first flow baffle and a second flow baffle. The first flow baffle is connected to the moving end of the moving mechanism, and the second flow baffle is detachably connected to the end of the first flow baffle away from the moving mechanism. It also includes a second connector; The flow-blocking plate has a third through hole, and the second connector is inserted into the third through hole to fix the flow-blocking plate to the support shield; The third through hole is configured as an elongated hole extending along the moving direction of the flow barrier, and the second connector can be inserted into different positions in the elongated hole to accommodate the flow barrier fixed at different positions of the support shield; It also includes sandbags; The end of the flow deflector away from the moving mechanism extends horizontally to form a placement platform, on which the sandbag is placed.

2. The waterproof structure for supporting the tail of the shield according to claim 1, characterized in that, The flow-blocking mechanism further includes a first connecting member; The first flow barrier has a first through hole, and the second flow barrier has a second through hole. The first connector is inserted into the first through hole and the second through hole to connect the first flow barrier and the second flow barrier.

3. The waterproof structure for supporting the tail of the shield according to claim 1 or 2, characterized in that, The connection between the flow-blocking plate and the placement platform is provided with supporting ribs in the vertical direction.

4. The waterproof structure for supporting the tail of the shield according to claim 1 or 2, characterized in that, The moving mechanism includes a moving rod, a first connecting platform, a second connecting platform, and a limiting block; The first connecting platform is connected to the support shield, and a fourth through hole is provided on the first connecting platform. The second connecting platform is connected to the baffle plate, and a fifth through hole is provided on the second connecting platform. The moving rod is inserted into the fourth through hole and the fifth through hole, and a limiting block is provided at the end of the moving rod near the baffle plate so as to abut against the bottom of the second connecting platform, so as to drive the limiting block to move through the moving rod, thereby driving the baffle plate to rise and fall.

5. The waterproof structure for supporting the tail of the shield according to claim 4, characterized in that, The movable rod is a threaded rod; The fourth through hole is a threaded hole, and the moving rod is connected to the first connecting platform by a thread.

6. The waterproof structure for supporting the tail of the shield according to claim 5, characterized in that, The moving mechanism also includes a turntable; The turntable is inserted at the end of the movable rod near the supporting shield to drive the movable rod to rotate relative to the first connecting platform.

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