Double shield TBM structure under adverse geological conditions

Abstract

The utility model discloses a double shield TBM structure under adverse geological conditions, and the rear side steel frame and the front side steel frame are fixed in the telescopic inner shield, and the adjusting turntable is arranged between the rear side steel frame and the front side steel frame, the adjusting turntable is fixedly installed with the rotating shaft, and the rotating shaft and the axis of adjusting turntable coincide, the second fixed part is fixed in the front side steel frame, one end of the rear side of the second fixed part is fixedly connected with the fixed end of rotating device through the rotating shaft, the first fixed part is fixedly installed on the side of adjusting turntable towards the rear side steel frame, and the third fixed part is fixedly installed on the side of adjusting turntable towards the front side steel frame. The utility model can effectively carry out the drilling grouting adjustment of multiple angles in a section, and then the surrounding rock outside the shield body is reinforced, and under the premise of hardly increasing the TBM appearance size and system complexity, the active geotechnical reinforcement capacity is endowed, and the utility model has the significant technical progress significance to improve the construction safety and efficiency of adverse geological section.

Description

Technical Field

[0001] This utility model relates to a TBM construction device, specifically to a double-shield TBM structure under adverse geological conditions. Background Technology

[0002] In tunnel boring machine (TBM) engineering, dual-shield TBMs are widely used due to their efficient parallel operation of tunneling segments. A traditional dual-shield TBM mainly consists of a front shield, a telescopic inner shield, a tail shield, and a propulsion system. Its telescopic inner shield is usually designed as a simple cylindrical steel structure, and its main function is to provide space for segment installation and transmit thrust.

[0003] For the treatment of unfavorable geological sections, fixed grouting is often used. Some improved TBMs have several grouting pipes fixedly installed on the outer wall of the shield or on the partition plate. However, the grouting direction is fixed and cannot be adjusted. Grouting can only be carried out in a specific direction, which cannot cope with the randomness and anisotropy of the surrounding rock deformation. Utility Model Content

[0004] The technical problem to be solved by this utility model is the existing technology. The purpose is to provide a double-shield TBM structure under adverse geological conditions to solve the above-mentioned problems.

[0005] This utility model is achieved through the following technical solution: A double-shield TBM structure under adverse geological conditions includes a drilling and grouting device, a rear steel frame, an adjusting turntable, grouting holes, a first fixing component, a second fixing component, a rotating device, a third fixing component, and a front steel frame, all configured inside the telescopic inner shield. The rear steel frame and the front steel frame are fixed inside the telescopic inner shield, and the adjusting turntable is arranged between the rear steel frame and the front steel frame; The adjusting turntable is fixedly mounted with a rotating shaft, and the axis of the rotating shaft and the axis of the adjusting turntable coincide. The second fixing member is fixed to the front steel frame, and one end of the rotating shaft is movably connected to the front side of the second fixing member, and the other end of the rotating shaft is movably connected to the rear side of the second fixing member; One end of the rotating shaft, which is movably connected to the rear side of the second fixing member, is fixedly connected to the fixed end of the rotating device; The rotating end of the rotating device is fixed to the rear steel frame, the axis of the rotating end coincides with the axis of the rotating shaft, and the rotating device can rotate along the axis of the rotating end; The first fixing member is fixedly installed on the side of the adjusting turntable facing the rear steel frame, and the third fixing member is fixedly installed on the side of the adjusting turntable facing the front steel frame, and the first fixing member is movably connected to the drilling and grouting device. When the rotating device drives the adjusting turntable to rotate to the designated position, the adjusting turntable is fixed to the front steel frame by the third fixing member, and the drilling and grouting sleeve of the drilling and grouting device passes through the grouting hole that penetrates the outer wall of the telescopic inner shield.

[0006] Furthermore, the drilling and grouting device also includes a drilling and grouting platform, a first protrusion, an adjusting cylinder, and a second protrusion; The first protrusion is fixed to the front bottom of the drilling and grouting platform, and the second protrusion is fixed to the rear bottom of the drilling and grouting platform; The first protrusion is hinged to the upper part of the first fixing member; The second protrusion is hinged to one end of the adjusting cylinder, and the other end of the adjusting cylinder is hinged to the lower part of the first fixing member.

[0007] Furthermore, the drilling and grouting device also includes a drilling grouter and a sleeve fixing component; The drilling grouting device is fixedly installed at the rear top of the drilling grouting platform, and the sleeve fixing component is fixedly installed at the front top of the drilling grouting platform; One end of the drilling grouting sleeve is fixed to the output end of the drilling grouting device, and the other end of the drilling grouting sleeve passes through the sleeve fixing member and then through the grouting hole; The drilling and grouting sleeve is fixed to the sleeve fixing component.

[0008] Furthermore, the rotating device is a motor; the motor is fixed to one end of the rotating shaft that is movably connected to the rear side of the second fixing member, and the output shaft of the motor is fixed to the rear steel frame.

[0009] Furthermore, the grouting holes include a first grouting hole, a second grouting hole, and a third grouting hole; The first grouting hole is located at the top of the outer wall of the telescopic inner shield, the second grouting hole is located on one side of the first grouting hole, and the third grouting hole is located on the other side of the first grouting hole; The third grouting hole and the second grouting hole are arranged symmetrically about the axis of the first grouting hole.

[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects: This utility model discloses a double-shield TBM structure for adverse geological conditions, which can effectively adjust the drilling and grouting at multiple angles within a single cross-section, thereby reinforcing the surrounding rock outside the shield. Without increasing the TBM's external dimensions and system complexity, it endows it with active soil and rock reinforcement capabilities, which has significant technological advancement implications for improving the safety and efficiency of construction in adverse geological sections. Attached Figure Description

[0011] 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 showing the distribution of grouting holes in this utility model; Figure 3 This is a schematic diagram of the drilling and grouting device of this utility model; Figure 4 This is a schematic diagram of the adjustable turntable structure of this utility model.

[0012] The attached diagram shows the markings and corresponding component names: 1-Drilling and grouting device, 2-Rear steel frame, 3-Adjusting turntable, 4-Grouting hole, 5-First fixing component, 6-Second fixing component, 7-Rotating device, 8-Third fixing component, 9-Front steel frame, 11-Drilling and grouting platform, 12-Drilling grouting device, 13-Drilling and grouting sleeve, 14-Sleeve fixing component, 15-First protrusion, 16-Adjusting cylinder, 17-Second protrusion. Detailed Implementation

[0013] 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

[0014] like Figures 1-4 As shown, this utility model discloses a double-shield TBM structure under adverse geological conditions, including a drilling and grouting device 1, a rear steel frame 2, an adjusting turntable 3, a grouting hole 4, a first fixing component 5, a second fixing component 6, a rotating device 7, a third fixing component 8, and a front steel frame 9, all configured inside the telescopic inner shield. The rear steel frame 2 and the front steel frame 9 are fixed inside the telescopic inner shield, and the adjusting turntable 3 is disposed between the rear steel frame 2 and the front steel frame 9; The adjusting turntable 3 is fixedly mounted with a rotating shaft, and the axis of the rotating shaft and the axis of the adjusting turntable 3 coincide. The second fixing member 6 is fixed to the front steel frame 9, and one end of the rotating shaft is movably connected to the front side of the second fixing member 6, and the other end of the rotating shaft is movably connected to the rear side of the second fixing member 6; One end of the rotating shaft, which is movably connected to the rear side of the second fixing member 6, is fixedly connected to the fixed end of the rotating device 7; The rotating end of the rotating device 7 is fixed to the rear steel frame 2, the axis of the rotating end coincides with the axis of the rotating shaft, and the rotating device 7 can rotate along the axis of the rotating end; The first fixing member 5 is fixedly installed on the side of the adjusting turntable 3 facing the rear steel frame 2, and the third fixing member 8 is fixedly installed on the side of the adjusting turntable 3 facing the front steel frame 9, and the first fixing member 5 is movably connected to the drilling and grouting device 1. When the rotating device 7 drives the adjusting turntable 3 to rotate to the designated position, the adjusting turntable 3 is fixed to the front steel frame 9 by the third fixing member 8, and the drilling and grouting sleeve 13 of the drilling and grouting device 1 passes through the grouting hole 4 that penetrates the outer wall of the telescopic inner shield.

[0015] In the implementation of this application embodiment, the rear steel frame and the front steel frame need to be fixed inside the telescopic inner shield. The telescopic inner shield is generally equipped with support shoes, and the front steel frame is generally located behind the support shoes to facilitate drilling and grouting at the location of the support shoes. Unlike conventional drilling and grouting technology, this application embodiment uses an adjustable drilling and grouting device for drilling and grouting; it requires the configuration of multiple corresponding grouting holes. In specific use, the adjusting turntable will rotate around the axis of rotation under the power of the rotating device, thereby adjusting the drilling and grouting device to a designated position; this designated position means that the output end of the drilling and grouting device faces the grouting hole. When the drilling and grouting sleeve is installed on the drilling and grouting device, the drilling and grouting sleeve can pass through the grouting hole for drilling and grouting. It should be understood that when the adjusting turntable rotates, the drilling and grouting sleeve needs to be removed, and it needs to be installed again after rotating to the appropriate position. The rotation of the adjustment turntable is achieved by a rotating shaft, which is coaxial with the adjustment turntable. The rotating shaft needs to be movably mounted on the corresponding bearing positions on the front and rear sides of the second fixed component to achieve rotation. The power source for the rotating shaft is a rotating device, which can be an electric motor or a hydraulic mechanism.

[0016] In this embodiment, after the turntable reaches the designated position, a third fixing member is needed to secure the turntable to provide a stable platform for the drilling grouting device. This third member can be fixed to the front steel frame. Simultaneously, the second fixing member and the turntable can also be secured together using pins. This method ensures platform stability after adjusting the position of the drilling grouting device.

[0017] Furthermore, the drilling and grouting device 1 also includes a drilling and grouting platform 11, a first protrusion 15, an adjusting cylinder 16, and a second protrusion 17; The first protrusion 15 is fixed to the front bottom of the drilling and grouting platform 11, and the second protrusion 17 is fixed to the rear bottom of the drilling and grouting platform 11. The first protrusion 15 is hinged to the upper part of the first fixing member 5; The second protrusion 17 is hinged to one end of the adjusting cylinder 16, and the other end of the adjusting cylinder 16 is hinged to the lower part of the first fixing member 5.

[0018] Furthermore, the drilling grouting device 1 also includes a drilling grouter 12 and a sleeve fixing component 14; The drilling grouting device 12 is fixedly installed on the rear top of the drilling grouting platform 11, and the sleeve fixing member 14 is fixedly installed on the front top of the drilling grouting platform 11. One end of the drilling grouting sleeve 13 is fixed to the output end of the drilling grouting device 12, and the other end of the drilling grouting sleeve 13 passes through the sleeve fixing member 14 and then through the grouting hole 4. The drilling and grouting sleeve 13 is fixed to the sleeve fixing member 14.

[0019] In the implementation of this application embodiment, the drilling and grouting platform is a platform used to provide the working space for the drilling and grouting device. Its pitch angle needs to be adjustable to enable drilling and grouting operations on grouting holes at different angles. Specifically, this is achieved through two protrusions. During the extension and retraction of the hydraulic cylinder, as the first protrusion rotates around the hinge point, the position of the drilling and grouting device can also be adjusted.

[0020] Furthermore, the rotating device 7 is a motor; the motor is fixed to one end of the rotating shaft that is movably connected to the rear side of the second fixing member 6, and the output shaft of the motor is fixed to the rear steel frame 2.

[0021] Furthermore, the grouting hole 4 includes a first grouting hole, a second grouting hole, and a third grouting hole; The first grouting hole is located at the top of the outer wall of the telescopic inner shield, the second grouting hole is located on one side of the first grouting hole, and the third grouting hole is located on the other side of the first grouting hole; The third grouting hole and the second grouting hole are arranged symmetrically about the axis of the first grouting hole.

[0022] 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 double-shield TBM structure for adverse geological conditions, characterized in that, It includes a drilling and grouting device (1), a rear steel frame (2), an adjusting turntable (3), a grouting hole (4), a first fixing member (5), a second fixing member (6), a rotating device (7), a third fixing member (8), and a front steel frame (9) configured inside the telescopic inner shield. The rear steel frame (2) and the front steel frame (9) are fixed inside the telescopic inner shield, and the adjustment turntable (3) is arranged between the rear steel frame (2) and the front steel frame (9); The adjusting turntable (3) is fixedly mounted with a rotating shaft, and the axis of the rotating shaft and the axis of the adjusting turntable (3) coincide; The second fixing member (6) is fixed to the front steel frame (9), and one end of the rotating shaft is movably connected to the front side of the second fixing member (6), and the other end of the rotating shaft is movably connected to the rear side of the second fixing member (6); One end of the rotating shaft, which is movably connected to the rear side of the second fixing member (6), is fixedly connected to the fixed end of the rotating device (7); The rotating end of the rotating device (7) is fixed to the rear steel frame (2), the axis of the rotating end coincides with the axis of the rotating shaft, and the rotating device (7) can rotate along the axis of the rotating end; The first fixing member (5) is fixedly installed on the side of the adjusting turntable (3) facing the rear steel frame (2), and the third fixing member (8) is fixedly installed on the side of the adjusting turntable (3) facing the front steel frame (9), and the first fixing member (5) is movably connected to the drilling grouting device (1). When the rotating device (7) drives the adjusting turntable (3) to rotate to the designated position, the adjusting turntable (3) is fixed to the front steel frame (9) by the third fixing member (8), and the drilling and grouting sleeve (13) of the drilling and grouting device (1) passes through the grouting hole (4) that penetrates the outer wall of the telescopic inner shield.

2. The double-shield TBM structure under adverse geological conditions according to claim 1, characterized in that, The drilling grouting device (1) also includes a drilling grouting platform (11), a first protrusion (15), an adjusting cylinder (16), and a second protrusion (17). The first protrusion (15) is fixed to the front bottom of the drilling and grouting platform (11), and the second protrusion (17) is fixed to the rear bottom of the drilling and grouting platform (11); The first protrusion (15) is hinged to the upper part of the first fixing member (5); The second protrusion (17) is hinged to one end of the adjusting cylinder (16), and the other end of the adjusting cylinder (16) is hinged to the lower part of the first fixing member (5).

3. The double-shield TBM structure under adverse geological conditions according to claim 2, characterized in that, The drilling grouting device (1) also includes a drilling grouter (12) and a sleeve fixing component (14). The drilling grouting device (12) is fixedly installed on the rear top of the drilling grouting platform (11), and the sleeve fixing member (14) is fixedly installed on the front top of the drilling grouting platform (11). One end of the drilling grouting sleeve (13) is fixed to the output end of the drilling grouting device (12), and the other end of the drilling grouting sleeve (13) passes through the sleeve fixing member (14) and then through the grouting hole (4). The drilling grouting sleeve (13) is fixed to the sleeve fixing member (14).

4. The double-shield TBM structure under adverse geological conditions according to claim 1, characterized in that, The rotating device (7) is a motor; the motor is fixed to one end of the rotating shaft that is movably connected to the rear side of the second fixing member (6), and the output shaft of the motor is fixed to the rear steel frame (2).

5. The double-shield TBM structure under adverse geological conditions according to claim 1, characterized in that, The grouting hole (4) includes a first grouting hole, a second grouting hole, and a third grouting hole; The first grouting hole is located at the top of the outer wall of the telescopic inner shield, the second grouting hole is located on one side of the first grouting hole, and the third grouting hole is located on the other side of the first grouting hole; The third grouting hole and the second grouting hole are arranged symmetrically about the axis of the first grouting hole.

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