Double shield TBM jamming escape device

Abstract

The utility model discloses a double shield TBM card machine escape device, including setting in the shield body inside of double shield TBM's exciter, the exciter is hydraulic exciter, and the oil inlet oil circuit of hydraulic exciter is in parallel in the oil inlet oil circuit of the support shoe device of double shield TBM. The utility model discloses double shield TBM card machine escape device can be through the mode of exciting vibration to the shield body exciting vibration to make the weak surrounding rock of card machine and the interstice between shield body, the grouting slurry enters conveniently, and further realizes the escape of shield body, and the oil circuit cooperation linkage of exciter and support shoe can realize the coordination of support shoe pressure and vibration pressure.

Description

Technical Field

[0001] This utility model relates to civil engineering equipment, specifically to a double-shield TBM jamming escape device. Background Technology

[0002] The dual-shield TBM uses segment support, which can adapt to both soft and hard rock, provided that the surrounding rock is self-stabilizing. When the strength of the surrounding rock cannot withstand the compressive stress of the support shoes, the auxiliary propulsion hydraulic cylinder supports the assembled segments to provide the cutterhead thrust; when the surrounding rock is good, the support shoes can be used to tighten the tunnel wall, and the main propulsion hydraulic cylinder can propel the cutterhead to break through the rock and advance. At this time, segment assembly and TBM tunneling can be synchronized.

[0003] The dual-shield TBM is an improved version of the single-shield TBM, possessing most of its advantages. It adds an independent support system and auxiliary propulsion cylinders to the single-shield design. The support system provides propulsion to the main propulsion system, while the auxiliary propulsion cylinders assist in the assembly and temporary support of tunnel segments. Excavation and segment installation can be carried out simultaneously, resulting in a higher overall tunneling progress than the single-shield TBM. However, dual-shield TBMs have a relatively higher probability of jamming in soft rock sections, and handling jams is relatively difficult. In the prior art, Chinese patent application number CN202210174344.9 provides a method for autonomous escape from a stuck TBM shield. Several grouting holes are pre-drilled in the upper semicircle of the shield. Thixotropic mud is injected into these holes via a grouting pump and grouting pipeline to reduce the friction coefficient between the shield and the surrounding rock, thereby reducing the frictional resistance of propulsion and allowing the TBM propulsion system to escape autonomously. To prevent the thixotropic mud from flowing back to the outside of the segments, cement mortar is injected through the grouting holes of the segments behind the tail shield to form a closed grout-stopping ring. While this method reduces propulsion friction through grouting, the flow direction of the grout is uncontrollable in weak surrounding rock, resulting in poor practical effectiveness. Utility Model Content

[0004] The technical problem to be solved by this utility model is the difficulty in starting and getting out of trouble with existing dual-shield TBMs. The purpose is to provide a device for getting a dual-shield TBM out of trouble and solve the above-mentioned problem.

[0005] This utility model is achieved through the following technical solution: A device for escaping a stuck TBM with dual shields includes a vibrator disposed inside the shield body of the dual shield TBM; the vibrator is a hydraulic vibrator, and the oil inlet circuit of the hydraulic vibrator is connected in parallel to the oil inlet circuit of the support shoe device of the dual shield TBM.

[0006] Furthermore, the boot support device includes a left boot support, a right boot support, and a boot support cylinder; The bottoms of the left and right support boots are hinged to the support steel frame of the dual-shield TBM; The top of the left support boot is hinged to one end of the support boot cylinder, and the top of the right support boot is hinged to the other end of the support boot cylinder.

[0007] Furthermore, the supporting steel frame is annular and fixed to the inner wall of the shield body; The lower part of the supporting steel frame is provided with a left supporting horn on the left side and a right supporting horn on the right side. The bottom of the left support boot is hinged to the left support horn, and the bottom of the right support boot is hinged to the right support horn.

[0008] Furthermore, when the oil pressure of the support shoe cylinder increases, the left support shoe and the right support shoe extend out of the shield body and support the surrounding rock.

[0009] Furthermore, the oil inlet circuit of the support shoe cylinder and the oil inlet circuit of the hydraulic vibrator are connected in parallel and are both connected to the same oil supply pipeline.

[0010] Furthermore, the exciter includes a left exciter and a right exciter; The left exciter is installed on the left support boot side of the shield body; The right exciter is installed on the right support boot tail side of the shield body.

[0011] Furthermore, the exciter includes an oil inlet pipe, an oil outlet pipe, a shock chamber, a shock disk, a high-pressure oil circuit, a piston chamber, a piston, and a piston rod; The oil inlet pipe is connected to the high-pressure oil circuit; The oil inlet pipe is also connected to the left side of the shock cavity, and the oil outlet pipe is connected to the right side of the shock cavity; The shock disk is disposed inside the shock cavity and rotates within the shock cavity; The section of the high-pressure oil circuit away from the oil inlet pipe is connected to the bottom of the piston; The piston is disposed in the piston chamber and moves within the piston chamber along the axis of the piston chamber; The piston rod is fixed to the bottom of the piston; The bottom of the shock cavity is connected to the piston cavity.

[0012] Furthermore, the surface of the shock disk that contacts the inner wall of the shock cavity is sealed, and the rotation axis of the shock disk coincides with the axis of the shock cavity.

[0013] Furthermore, the shock disk divides the shock cavity into an oil inlet chamber and an oil outlet chamber, and the oil inlet chamber and the oil outlet chamber are sealed together. When the shock disk rotates in the shock cavity, and the oil inlet chamber and the piston chamber are connected, the piston drives the piston rod to move away from the end of the piston chamber along the piston chamber axis; When the oil outlet chamber and the piston chamber are connected, the piston drives the piston rod to move along the piston chamber axis toward the end of the piston chamber.

[0014] Furthermore, the fixed end of the vibrator is fixed to the supporting steel frame, and the piston rod is fixed to the shield body.

[0015] Compared with the prior art, this utility model has the following advantages and beneficial effects: This utility model of a double-shield TBM jamming escaping device can excite the shield body through vibration, thereby creating a gap between the jammed soft surrounding rock and the shield body, facilitating the entry of grout and thus enabling the shield body to escape; at the same time, the coordinated linkage of the vibrator and the hydraulic circuit of the support shoe can achieve the coordination of the support shoe pressure and the vibration pressure. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the exciter structure of this utility model.

[0017] The attached diagram shows the markings and corresponding component names: 1-Shield body, 2-Left support shoe, 3-Right support shoe, 4-Support shoe cylinder, 5-Vibrator, 6-Support steel frame, 51-Inlet pipe, 52-Outlet pipe, 53-Shock chamber, 54-Shock disk, 55-High-pressure oil circuit, 56-Piston chamber, 57-Piston, 58-Piston rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model. Example

[0019] like Figure 1 As shown, the present invention relates to a double-shield TBM jamming escape device, which includes a vibrator 5 disposed inside the shield body 1 of the double-shield TBM; the vibrator 5 is a hydraulic vibrator, and the oil inlet circuit of the hydraulic vibrator is connected in parallel to the oil inlet circuit of the support shoe device of the double-shield TBM.

[0020] In the implementation of this application embodiment, the vibrator fixedly installed on the inside of the shield body can vibrate the shield body, thereby causing the weak surrounding rock that surrounds and jams the machine to vibrate. During the vibration, a gap will be generated between the weak surrounding rock and the shield body. At this time, the grout injected by the TBM grouting system can enter the gap for lubrication and achieve machine release under the action of the thrust. At the same time, the weak surrounding rock may liquefy under vibration, which can also effectively reduce the friction between the weak surrounding rock and the shield body, further helping to get out of the jam. Since the oil inlet circuits of the hydraulic vibrator and the support shoe device are connected in parallel, these two circuits are connected to the same hydraulic system. Initially, when the support shoe device is under a smaller load before being pushed out of the shell, the hydraulic oil in the system is preferentially supplied to it. When the support shoe device comes into contact with the surrounding rock, the pressure increases sharply, and the oil supply direction changes to the vibrator, providing a stronger excitation force. Under this excitation force, the surrounding rock loosens or even liquefies, causing the pressure on the support shoe device to drop. At this point, the oil supply system shifts its focus to supplying oil to the support shoe device. This cycle allows the weak surrounding rock supported by the support shoe device to be continuously pushed outwards, thereby reducing the pressure of the surrounding rock on the shell and reducing friction. It should be noted that, for a hydraulic system, in the same pipeline, hydraulic oil will preferentially supply oil to the side with a smaller load. This is determined by the characteristics of hydraulic system oil supply. The embodiments of this application cleverly utilize this characteristic to achieve the linkage between the support shoe device and the vibrator.

[0021] Furthermore, the boot support device includes a left boot support 2, a right boot support 3, and a boot support cylinder 4; The bottoms of the left support boot 2 and the right support boot 3 are hinged to the support steel frame 6 of the double-shield TBM; The top of the left support shoe 2 is hinged to one end of the support shoe cylinder 4, and the top of the right support shoe 3 is hinged to the other end of the support shoe cylinder 4.

[0022] Furthermore, the supporting steel frame 6 is annular and fixed to the inner wall of the shield body 1; The lower part of the supporting steel frame 6 is provided with a left supporting horn on the left side and a right supporting horn on the right side. The bottom of the left support boot 2 is hinged to the left support horn, and the bottom of the right support boot 3 is hinged to the right support horn.

[0023] In the implementation of this application embodiment, a traditional double-support shoe device is adopted, which adjusts the position of the two support shoes on the left and right sides through the support shoe cylinder to achieve support for the external soft surrounding rock.

[0024] Furthermore, when the oil pressure of the support shoe cylinder 4 increases, the left support shoe 2 and the right support shoe 3 extend out of the shield body 1 and support it on the surrounding rock.

[0025] Furthermore, the oil inlet circuit of the support shoe cylinder 4 and the oil inlet circuit of the hydraulic vibrator are connected in parallel and are both connected to the same oil supply pipeline.

[0026] Furthermore, the exciter 5 includes a left exciter and a right exciter; The left exciter is installed on the left support boot 2 of the shield body 1 at the tail side; The right exciter is installed on the right support boot 3 of the shield body 1 at the tail side.

[0027] Furthermore, the exciter 5 includes an oil inlet pipe 51, an oil outlet pipe 52, a shock chamber 53, a shock disk 54, a high-pressure oil circuit 55, a piston chamber 56, a piston 57, and a piston rod 58. The oil inlet pipe 51 is connected to the high-pressure oil circuit 55; The oil inlet pipe 51 is also connected to the left side of the shock cavity 53, and the oil outlet pipe 52 is connected to the right side of the shock cavity 53. The shock disk 54 is disposed inside the shock cavity 53 and rotates within the shock cavity 53; The section of the high-pressure oil passage 55 away from the oil inlet pipe 51 is connected to the bottom of the piston 57; The piston 57 is disposed in the piston cavity 56 and moves within the piston cavity 56 along the axis of the piston cavity 56. The piston rod 58 is fixed to the bottom of the piston 57; The bottom of the shock chamber 53 is connected to the piston chamber 56.

[0028] Furthermore, the shock disk 54 is sealed to the inner wall of the shock cavity 53, and the rotation axis of the shock disk 54 coincides with the axis of the shock cavity 53.

[0029] Furthermore, the shock disk 54 divides the shock cavity 53 into an oil inlet chamber and an oil outlet chamber, and the oil inlet chamber and the oil outlet chamber are sealed together. When the shock disk 54 rotates in the shock cavity 53, and the oil inlet chamber and the piston cavity 56 are connected, the piston 57 drives the piston rod 58 to move along the axis of the piston cavity 56 in a direction away from the end of the piston cavity 56. When the oil outlet chamber and the piston chamber 56 are connected, the piston 57 drives the piston rod 58 to move along the axis of the piston chamber 56 toward the end of the piston chamber 56.

[0030] Furthermore, the fixed end of the vibrator 5 is fixed to the supporting steel frame 6, and the piston rod 58 is fixed to the shield body 1.

[0031] When implementing the embodiments of this application, please refer to Figure 2 This paper provides a specific structural form of a shock cavity, wherein the shock cavity is preferably cylindrical, and the shock disk is preferably rectangular. The shock disk requires a motor to provide power and rotates within the shock cavity. An oil inlet pipe connects to the shock cavity and is also connected to the bottom of the piston via a high-pressure oil circuit. It should be understood that the rotation axis of the shock disk coincides with the axis of the aforementioned cylinder, and the position where the shock disk contacts the shock cavity needs to be sealed. During operation, the shock disk divides the shock cavity into an oil inlet chamber and an oil outlet chamber, where the oil inlet chamber is connected to the oil inlet pipe, and the oil outlet chamber is connected to the oil outlet pipe. Yes, the inlet and outlet chambers are dynamically divided as the shock disk rotates. In one state, the inlet chamber connects to the piston chamber, where hydraulic oil at the same pressure exists on both sides of the piston. However, because the piston surface area inside the piston chamber is larger than the area where the piston connects to the piston rod, the piston moves towards the piston rod. In another state, the outlet chamber connects to the piston chamber, where the hydraulic oil in the piston chamber loses pressure, and the piston moves towards the piston end, thus achieving excitation. Generally, the excitation frequency depends on the rotation speed of the shock disk, while the excitation force depends on the oil pressure in the inlet pipe.

[0032] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A dual-shield TBM jamming escape device, characterized in that, It includes a vibrator (5) installed inside the shield body (1) of the double-shield TBM; the vibrator (5) is a hydraulic vibrator, and the oil inlet of the hydraulic vibrator is connected in parallel to the oil inlet of the support shoe device of the double-shield TBM.

2. The dual-shield TBM jamming escape device according to claim 1, characterized in that, The boot support device includes a left boot support (2), a right boot support (3), and a boot support cylinder (4). The bottoms of the left support boot (2) and the right support boot (3) are hinged to the support steel frame (6) of the double shield TBM. The top of the left support boot (2) is hinged to one end of the support boot cylinder (4), and the top of the right support boot (3) is hinged to the other end of the support boot cylinder (4).

3. The dual-shield TBM jamming escape device according to claim 2, characterized in that, The supporting steel frame (6) is ring-shaped and fixed to the inner wall of the shield body (1); The lower part of the supporting steel frame (6) is provided with a left supporting horn on the left side and a right supporting horn on the right side. The bottom of the left support boot (2) is hinged to the left support horn, and the bottom of the right support boot (3) is hinged to the right support horn.

4. The dual-shield TBM jamming escape device according to claim 2, characterized in that, When the oil pressure of the support shoe cylinder (4) increases, the left support shoe (2) and the right support shoe (3) extend out of the shield body (1) and are supported on the surrounding rock.

5. The dual-shield TBM jamming escape device according to claim 2, characterized in that, The oil inlet circuit of the support shoe cylinder (4) and the oil inlet circuit of the hydraulic vibrator are connected in parallel and are connected to the same oil supply pipeline.

6. The dual-shield TBM jamming escape device according to claim 2, characterized in that, The exciter (5) includes a left exciter and a right exciter; The left exciter is installed on the left support boot (2) of the shield body (1) at the tail side; The right exciter is installed on the right support boot (3) of the shield body (1) at the tail side of the shield.

7. The dual-shield TBM jamming escape device according to claim 2, characterized in that, The exciter (5) includes an oil inlet pipe (51), an oil outlet pipe (52), a shock chamber (53), a shock disk (54), a high-pressure oil circuit (55), a piston chamber (56), a piston (57), and a piston rod (58). The oil inlet pipe (51) is connected to the high-pressure oil circuit (55); The oil inlet pipe (51) is also connected to the left side of the shock cavity (53), and the oil outlet pipe (52) is connected to the right side of the shock cavity (53); The shock disk (54) is disposed in the shock cavity (53) and rotates within the shock cavity (53); The high-pressure oil passage (55) is connected to the bottom of the piston (57) at a point away from the oil inlet pipe (51). The piston (57) is disposed in the piston cavity (56) and moves within the piston cavity (56) along the axis of the piston cavity (56); The piston rod (58) is fixed to the bottom of the piston (57); The bottom of the shock chamber (53) is connected to the piston chamber (56).

8. The dual-shield TBM jamming escape device according to claim 7, characterized in that, The shock disk (54) is sealed to the inner wall of the shock cavity (53), and the rotation axis of the shock disk (54) coincides with the axis of the shock cavity (53).

9. The dual-shield TBM jamming escape device according to claim 7, characterized in that, The shock disk (54) divides the shock cavity (53) into an oil inlet chamber and an oil outlet chamber, and the oil inlet chamber and the oil outlet chamber are sealed together. When the shock disk (54) rotates in the shock cavity (53), when the oil inlet chamber and the piston cavity (56) are connected, the piston (57) drives the piston rod (58) to move away from the end of the piston cavity (56) along the axis of the piston cavity (56); When the oil outlet chamber and the piston chamber (56) are connected, the piston (57) drives the piston rod (58) to move along the axis of the piston chamber (56) towards the end of the piston chamber (56).

10. The dual-shield TBM jamming escape device according to claim 7, characterized in that, The fixed end of the vibrator (5) is fixed to the support steel frame (6), and the piston rod (58) is fixed to the shield body (1).

Images