Portal water stop control device based on shield receiving process in sensitive area

Abstract

The utility model belongs to the technical field of tunnel construction, and discloses a tunnel portal water stop control device based on a shield receiving process in a sensitive area, which is characterized in that driving devices are arranged on one side of an outlet of an underground diaphragm wall and are uniformly arranged along the circumferential direction of a shield tunneling machine at intervals, and the output ends of the driving devices are propped against a water stop belt; the water stop belt can be pushed to move in the direction away from the shield tunneling machine. An operator monitors whether the joint of the shield tunneling machine and the underground diaphragm wall leaks water or not, when water leakage is found, the driving device is started, the output end of the driving device is moved in the moving direction away from the shield tunneling machine, the water stop belt is reinforced, and effective water stop operation is conducted. The device effectively solves the problem of water leakage caused by looseness of the water-stop belt in traditional shield construction, realizes rapid reinforcement and adjustment of the water-stop belt in the shield receiving process, can ensure good sealing between the water-stop belt and surrounding geology, improves the water-stop effect, reduces the influence of water immersion on construction, and improves the construction quality. And the risk of accidents in the construction process of the shield tunneling machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a tunnel portal water-stopping control device based on a shield receiving process in a sensitive area. Background Art

[0002] With the rapid development of urban rail, shield construction method has been widely used as the main construction method of urban tunnels. The process of the shield machine entering and exiting the construction stratum through the tunnel portal is called shield launching and shield receiving respectively. Generally, in order to ensure the smooth passage of the shield machine through the tunnel portal, the diameter of the tunnel portal is larger than the diameter of the shield machine. When the stratum water content in the construction range is high, the stratum is disturbed during the launching and receiving process of the shield machine, which is likely to form a seepage channel for groundwater between the tunnel portal and the shield machine casing. The outflow of groundwater mixed with mud and sand is likely to induce accidents such as water and sand gushing. Therefore, it is necessary to set a water-stopping device at the tunnel portal to stop water and ensure the smooth reception of the shield machine.

[0003] The water-stop device at the tunnel portal usually includes a sealed water-stop strip between the shield machine and the ground-connected wall to prevent groundwater from seeping into the tunnel through the connection. However, due to the underground pressurized water pressure applied to the soil layer around the shield machine, the shield machine will drive the water-stop strip to move during its movement, which can easily lead to the loosening of the water-stop strip and poor water-stopping effect.

[0004] Therefore, there is an urgent need for a device that can prevent the water stop strip from loosening and enhance the water stop effect. Utility Model Content

[0005] The utility model aims to provide a tunnel portal water-stopping control device based on the shield receiving process in a sensitive area, which can effectively solve the problem of poor tunnel portal water-stopping effect caused by loose water-stop belt during the shield receiving process.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The tunnel gate water-stopping control device based on the shield receiving process in the sensitive area includes a water-stopping belt, which is arranged between the shield machine and the ground-connected wall, wherein the tunnel gate water-stopping control device based on the shield receiving process in the sensitive area also includes:

[0008] Multiple driving devices are arranged on one side of the ground-connected wall outlet and are evenly spaced along the circumference of the shield machine. The output end of the driving device can abut against the waterstop belt to push the waterstop belt to move in a direction away from the moving direction of the shield machine.

[0009] Furthermore, the driving device is a hydraulic cylinder or an electric cylinder.

[0010] Furthermore, the drive device has a transmission connecting rod, and the transmission connecting rod has a first transmission end and a second transmission end. The first transmission end abuts against the waterstop belt, and the second transmission end is provided with a locking portion, and the locking portion can be interlocked with the shield machine. When the locking portion moves synchronously with the shield machine, the first transmission end abuts against the waterstop belt and moves in a direction away from the moving direction of the shield machine.

[0011] Furthermore, the transmission connecting rod includes a first gear, a second gear, an active rod, a driven rod and a fixing member, the fixing member is fixed to the ground wall, the first gear and the second gear are rotatably arranged on the fixing member, the first gear and the second gear are meshed for transmission, the first end of the active rod is connected to the first gear, the second end of the active rod is connected to the locking part, the first end of the driven rod is connected to the second gear, and the second end of the driven rod is abutted against the water stop belt.

[0012] Furthermore, the angle between the active rod and the driven rod is a, 0°<a<180°

[0013] Furthermore, the shield machine is provided with a sliding shaft on one side of the ground-connected wall exit, and the sliding shaft extends along the moving direction of the shield machine; the locking part includes a locking ring and a locking drive component, the locking ring is sleeved on the sliding shaft, the locking ring has a locking state locked with the sliding shaft and a sliding state sliding with the sliding shaft, and the locking drive component drives the locking ring to switch between the locking state and the sliding state.

[0014] Furthermore, the locking ring buckle includes a ring portion with an opening, the sliding shaft is inserted into the ring portion, the open end of the ring portion is provided with opposite wings, and the locking drive member connects the two wings to drive the two wings to move closer to or away from each other.

[0015] Furthermore, the locking drive component includes a bolt passing through the wing and an electric torque wrench, the nut is provided on the bolt, and the electric torque wrench is connected to the bolt or the nut.

[0016] Furthermore, the shield machine is provided with a humidity sensor at one side of the ground-connected wall outlet, and the humidity sensor is communicatively connected with the locking drive component.

[0017] Furthermore, a friction gasket is provided on the inner wall of the locking ring buckle.

[0018] Beneficial effects of the utility model:

[0019] The tunnel portal water stop control device based on the shield receiving process in the sensitive area sets the water stop belt between the shield machine and the ground wall. By setting the driving device on the side of the ground wall outlet and setting it evenly along the circumference of the shield machine, the output end of the driving device is pressed against the water stop belt, which can push the water stop belt to move in the direction away from the shield machine. When water leakage is detected at the connection between the shield machine and the ground wall, the driving device is started, and the output end of the driving device is moved in the direction away from the shield machine to reinforce the water stop belt and perform effective water stop operation; when the water leakage stops, the output end of the driving device continues to press against the water stop belt until the shield machine as a whole smoothly escapes from the tunnel portal. The device effectively solves the problem of water leakage caused by loose water stop belt in traditional shield construction, realizes the rapid reinforcement and adjustment of the water stop belt during the shield receiving process, can ensure that the water stop belt is well sealed with the surrounding geology, improves the water stop effect, reduces the impact of water immersion on construction, and reduces the risk of accidents during shield machine construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the tunnel gate water-stopping control device based on the shield receiving process in the sensitive area of ​​the utility model;

[0021] Figure 2 It is a structural schematic diagram of the drive device of the utility model;

[0022] Figure 3 This is a front view of the tunnel gate water-stopping control device based on the shield receiving process in the sensitive area of ​​the utility model;

[0023] In the figure:

[0024] 1. Waterstop; 2. Shield machine; 3. Ground-connected wall;

[0025] 4. Transmission connecting rod; 41. First gear; 42. Active rod; 43. Second gear; 44. Driven rod; 45. Fixing member;

[0026] 5. locking part; 51. locking ring; 52. locking drive member; 521. bolt; 522. nut; 523. electric torque wrench; 53. sliding shaft; 54. friction gasket;

[0027] 6. Humidity sensor;

[0028] 7. Controller. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] Please refer to Figure 1-Figure 3As shown, the tunnel portal water-stopping control device based on the shield receiving process in the sensitive area provided in this embodiment includes a water-stopping belt 1 and a plurality of driving devices, wherein the water-stopping belt 1 is arranged between the shield machine 2 and the ground-connected wall 3; the plurality of driving devices are arranged on one side of the outlet of the ground-connected wall 3, and are evenly spaced along the circumference of the shield machine 2, and the output end of the driving device can push against the water-stopping belt 1 to push the water-stopping belt 1 to move in the moving direction away from the shield machine 2; when the shield machine 2 drives the water-stopping belt 1 to move and water leakage occurs, the driving device is started, and the output end of the driving device can push the water-stopping belt 1 to move in the moving direction away from the shield machine 2, so that the water-stopping belt 1 is always between the shield machine 2 and the ground-connected wall 3, and an effective water-stopping operation is performed; when there is no water leakage, the output end of the driving device may no longer push the water-stopping belt 1 until the shield machine 2 as a whole smoothly escapes from the tunnel portal. Among them, multiple drive devices are evenly spaced along the circumference of the shield machine 2. When water leakage occurs, after accurately locating the water leakage point, each drive device can respond quickly and immediately perform targeted water-stopping operations. Evenly arranging them around the shield machine 2 can ensure that the distance between each point acting on the waterstop 1 is relatively uniform, thereby improving the accuracy of water stopping. This device effectively solves the problem of loose waterstop 1 causing water leakage in traditional shield construction, realizes the rapid reinforcement and adjustment of the waterstop 1 during the shield receiving process, and can ensure that the waterstop 1 is well sealed with the surrounding geology, improves the water-stopping effect, reduces the impact of water immersion on construction, and reduces the risk of accidents during the construction of the shield machine 2.

[0034] Specifically, it should be noted that the water stop 1 can be, but is not limited to, packing or rubber sealing filler.

[0035] like Figure 1 As shown, in some embodiments, the driving device includes a transmission connecting rod 4, the transmission connecting rod 4 has a first transmission end and a second transmission end, wherein the first transmission end abuts against the waterstop belt 1, and the second transmission end is provided with a locking portion 5, and the locking portion 5 can be interlocked with the shield machine 2. When the locking portion 5 moves synchronously with the shield machine 2, the first transmission end abuts against the waterstop belt 1 and moves in a moving direction away from the shield machine 2, so that it remains between the shield machine 2 and the ground-connected wall 3. Among them, the device uses the locking part 5 to apply a pulling force consistent with the movement direction of the shield machine 2 to the second transmission end of the transmission link 4, and uses the characteristics of the transmission link 4 that can transmit force and torque, thereby driving the first transmission end of the transmission link 4 to push against the waterstop belt 1 and move in the moving direction away from the shield machine 2, so that when a water leakage is found, the water stopping operation can be performed quickly and accurately; the locking part 5 can be interlocked with the shield machine 2, which increases the flexibility of the device. Once the water leakage is detected, the locking part 5 can be locked with the shield machine 2, so that the shield machine 2 can drive the locking part 5 to move synchronously, and then drive the transmission link 4 to reinforce the waterstop belt 1; when the water stopping operation is completed, the locking part 5 can be released from the interlocking with the shield machine 2, and the waterstop belt 1 will no longer be pushed.

[0036] like Figure 2 As shown, further, the transmission connecting rod 4 includes a first gear 41, a second gear 43, an active rod 42, a driven rod 44 and a fixing member 45, wherein the fixing member 45 is fixed on the ground connection wall 3, the first gear 41 and the second gear 43 are rotatably arranged on the fixing member 45, the first gear 41 and the second gear 43 are rotatably arranged on the fixing member 45, the two are meshed and transmitted, the first end of the active rod 42 is connected to the first gear 41, the second end of the active rod 42 is connected to the locking part 5, the first end of the driven rod 44 is connected to the second gear 43, and the second end of the driven rod 44 is against the water stop 1. Among them, the use of gear transmission can withstand large forces and torques, and is suitable for mechanical equipment such as shield machines 2 that require large power transmission, ensuring that the transmission connecting rod 4 can apply sufficient force to the water stop 1 to ensure the effectiveness of the water stop operation; in addition, the gear transmission also has good transmission efficiency and reliability, and can achieve accurate power transmission through meshing rotation to ensure that the active rod 42 and the driven rod 44 move synchronously. Optionally, a pressure ring is provided at the second end of the driven rod 44, and the pressure ring is pressed against the waterstop 1. The pressure ring can make the waterstop 1 bear the force more evenly, thereby improving the stability of the waterstop 1. It should be noted here that the pressure ring is a prior art, and the specific structure will not be repeated.

[0037] In order to control the movement path of the transmission link 4 and optimize the efficiency of the water-stopping operation, the angle between the first end of the active rod 42 and the first end of the driven rod 44 is set to a, wherein 0°<a<180°; when 0°<a<180°, by applying a pulling force consistent with the movement direction of the shield machine 2 to the active rod 42, the active rod 42 can drive the driven rod 44 to move in a direction away from the movement of the shield machine 2; selecting an appropriate angle a can ensure the stability and reliability of the transmission link 4 system, and the angle a can be reasonably adjusted according to the actual needs of the construction site.

[0038] like Figure 3As shown, in some embodiments, a sliding shaft 53 is provided on the shield machine 2 at one side of the exit of the ground-connected wall 3, and the sliding shaft 53 extends along the moving direction of the shield machine 2; the locking part 5 includes a locking ring 51 and a locking drive 52, the locking ring 51 is sleeved on the sliding shaft 53, the locking ring 51 has a locking state locked with the sliding shaft 53 and a sliding state sliding with the sliding shaft 53, and the locking drive 52 drives the locking ring 51 to switch between the locking state and the sliding state. When the locking ring 51 and the sliding shaft 53 are in a locked state, the shield machine 2 moves. At this time, the shield machine 2 applies a pulling force to the sliding shaft 53 in the moving direction of the shield machine 2. Since the locking ring 51 is locked with the sliding shaft 53 at this time, the two are in a relatively static state. Therefore, the sliding shaft 53 can transmit the pulling force to the locking ring 51, driving the locking part 5 to move synchronously, and then the movement of the shield machine 2 can drive the above-mentioned transmission connecting rod 4, so as to push the water stop 1; when the locking ring 51 and the sliding shaft 53 are in a sliding state, the shield machine 2 moves. Although the shield machine 2 still applies a pulling force to the sliding shaft 53 in the moving direction of the shield machine 2 at this time, since the locking ring 51 and the sliding shaft 53 are in a sliding state at this time, the sliding shaft 53 can slide in the locking ring 51 at the same speed as the shield machine 2, and the locking part 5 does not follow its movement. At this time, the movement of the shield machine 2 cannot drive the transmission connecting rod 4, and therefore cannot push the water stop 1. The locking drive 52 can control the locking or opening state of the locking ring buckle 51, so that the locking ring buckle 51 can freely switch between states according to whether there is water leakage. Furthermore, the height of the sliding shaft 53 can be consistent with the height of the locking ring buckle 51, which can reduce the wear of the sliding shaft 53 and increase the service life of the device. In other embodiments, the sliding shaft 53 can be replaced by a nylon rope or a steel wire rope.

[0039] In order to improve the stability of the locking and opening and closing states of the lock ring buckle 51, the lock ring buckle 51 is set to a ring portion with an opening, the sliding shaft 53 is inserted into the ring portion, and the open end of the ring portion is provided with relative fins, and the locking drive 52 connects the two fins to drive the two fins to move closer or farther from each other, so that when the two fins are close, the ring portion can be effectively contracted to lock the sliding shaft 53, so that the lock ring buckle 51 and the shield machine 2 move synchronously; when the two fins are away from each other, the sliding shaft 53 can be effectively released to slide in the lock ring buckle 51. Among them, the connection method of the two fins can be but is not limited to threaded connection or snap connection. Further, a friction gasket 54 is provided on the inner wall of the lock ring buckle 51, which can increase the friction resistance between the lock ring buckle 51 and the sliding shaft 53 to ensure the stability of the locking state. Furthermore, the locking drive member 52 can be configured as a bolt 521 penetrating the wing and an electric torque wrench 523, wherein a nut 522 is provided on the bolt 521, and the electric torque wrench 523 connects the bolt 521 or the nut 522. The use of the electric torque wrench 523 can realize fast tightening or loosening of the bolt 521 or the nut 522, which is easy and efficient to operate, and the electric torque wrench 523 can accurately control the magnitude of the torque, ensuring that the tightening force of the bolt 521 or the nut 522 meets the design requirements, and preventing problems caused by over-tightening or under-tightening.

[0040] It can be understood that, in another embodiment, the driving device can be, but is not limited to, a hydraulic cylinder or an electric cylinder. When a hydraulic cylinder or an electric cylinder is used, it can be fixed on the ground-connected wall 3.

[0041] In some embodiments, the shield machine 2 is provided with a humidity sensor 6 on one side of the ground-connected wall 3 outlet, and the humidity sensor 6 is connected to the locking drive 52 through the controller 7 to realize automatic control. The humidity sensor 6 can monitor the humidity change on one side of the ground-connected wall 3 outlet in real time, and can timely and accurately feedback the water leakage to the controller 7, and then the controller 7 controls the locking drive 52 to lock the sliding shaft 53 to reinforce the water stop 1, so as to facilitate timely water stop operation, avoid more serious water leakage, and avoid more serious impact on construction. In addition, the controller 7 can record the monitored data for subsequent analysis and reference, which is helpful to understand the regularity of humidity changes in the engineering process and provide experience for similar projects in the future. It should be noted that the controller 7 can be but not limited to using STM32.

[0042] In some embodiments, at least two humidity sensors 6 are arranged along the circumference of the shield machine 2. By setting up multiple humidity sensors 6, water leakage can be fully monitored, so that the device covers a wider area. The humidity sensor 6 can collect data at multiple points of the shield machine 2, and can more accurately monitor water leakage, and promptly stop the leakage point to ensure smooth reception of the shield machine 2.

[0043] The construction process of the tunnel gate water stop control device based on the shield receiving process in the sensitive area provided by this embodiment is described in detail below:

[0044] First, after the shield machine 2 completes the tunnel excavation task, the shield machine 2 is passed through the tunnel portal;

[0045] Secondly, place the water stop belt 1 between the shield machine 2 and the ground-connected wall 3, set the driving device on the outlet side of the ground-connected wall 3, and evenly space it along the circumference of the shield machine 2, and make the output end of the driving device touch the water stop belt 1;

[0046] Afterwards, start the shield machine 2 and monitor it in real time; when water leakage is detected at the connection between the shield machine 2 and the ground-connected wall 3, start the driving device, move the output end of the driving device away from the moving direction of the shield machine 2, reinforce the waterstop 1, and perform effective water-stopping operations; when the water leakage stops, stop pushing the waterstop 1, so that the shield machine 2 can pass through the tunnel smoothly.

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A tunnel portal water stop control device based on a shield receiving process in a sensitive area, comprising a water stop belt (1), wherein the water stop belt (1) is arranged between a shield machine (2) and a ground-connected wall (3), and is characterized in that: The tunnel gate water-stopping control device based on the shield receiving process in the sensitive area also includes: A plurality of driving devices are provided on one side of the outlet of the ground-connected wall (3) and are evenly spaced along the circumference of the shield machine (2); the output end of the driving device can abut against the waterstop belt (1) to push the waterstop belt (1) to move in a direction away from the moving direction of the shield machine (2).

2. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 1 is characterized in that: The driving device is a hydraulic cylinder or an electric cylinder.

3. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 1 is characterized in that: The driving device includes a transmission connecting rod (4), and the transmission connecting rod (4) has a first transmission end and a second transmission end. The first transmission end abuts against the water stop belt (1), and the second transmission end is provided with a locking portion (5). The locking portion (5) can be interlocked with the shield machine (2). When the locking portion (5) moves synchronously with the shield machine (2), the first transmission end abuts against the water stop belt (1) and moves in a direction away from the moving direction of the shield machine (2).

4. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 3 is characterized in that: The transmission connecting rod (4) includes a first gear (41), a second gear (43), an active rod (42), a driven rod (44) and a fixing member (45); the fixing member (45) is fixed to the ground-connected wall (3); the first gear (41) and the second gear (43) are rotatably arranged on the fixing member (45); the first gear (41) and the second gear (43) are meshed for transmission; the first end of the active rod (42) is connected to the first gear (41); the second end of the active rod (42) is connected to the locking portion (5); the first end of the driven rod (44) is connected to the second gear (43); the second end of the driven rod (44) abuts against the water stop belt (1).

5. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 4 is characterized in that: The included angle between the active rod (42) and the driven rod (44) is a, 0°<a<180°.

6. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 4 is characterized in that: The shield machine (2) is provided with a sliding shaft (53) on one side of the exit of the ground-connected wall (3), and the sliding shaft (53) extends along the moving direction of the shield machine (2); the locking part (5) includes a locking ring (51) and a locking drive (52), the locking ring (51) is sleeved on the sliding shaft (53), the locking ring (51) has a locking state locked with the sliding shaft (53) and a sliding state sliding with the sliding shaft (53), and the locking drive (52) drives the locking ring (51) to switch between the locking state and the sliding state.

7. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 6 is characterized in that: The locking ring buckle (51) comprises a ring portion with an opening, the sliding shaft (53) is inserted into the ring portion, and opposite wings are arranged at the open end of the ring portion. The locking driving member (52) connects the two wings to drive the two wings to move closer to or away from each other.

8. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 7 is characterized in that: The locking drive member (52) comprises a bolt (521) penetrating the wing and an electric torque wrench (523), a nut (522) being arranged on the bolt (521), and the electric torque wrench (523) being connected to the bolt (521) or the nut (522).

9. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 6 is characterized in that: The shield machine (2) is provided with a humidity sensor (6) located on one side of the exit of the ground-connected wall (3), and the humidity sensor (6) is communicatively connected with the locking drive component (52).

10. The tunnel portal water-stopping control device based on the shield receiving process in the sensitive area according to claim 6 is characterized in that: The inner wall of the lock ring buckle (51) is provided with a friction pad (54).

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