A shield tunnel mobile support trolley

Abstract

The utility model belongs to the field of shield tunnel, especially a kind of shield tunnel movable support trolley, to the problem that the existing support mode can be insufficient, poor stability, weak adaptability Problem, unable to meet the high requirements of modern shield tunnel construction, the following scheme is presented, it includes each trolley along tunnel axis direction and presents sequential arrangement, and multiple trolley is sequentially matched and advances, only one trolley does not support shield segment in advancing process, realize to reduce span support;The trolley includes: door type frame main body, its bottom is equipped with travelling mechanism, and the travelling mechanism is used to realize the accurate longitudinal movement and fine positioning of trolley in tunnel, in the utility model, the force action and reaction force principle are considered when trolley system is designed, the length of tunnel single time is controlled at about 5 meters by the way of reducing span support.This design not only reduces the risk in the process of tunnel construction, but also improves construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel technology, and in particular to a mobile support trolley for shield tunnels. Background Technology

[0002] During shield tunnel construction, supporting the constructed tunnel sections is necessary to ensure the tunnel's stability and safety. Traditional support methods may suffer from insufficient support force, poor stability, and limited adaptability, failing to meet the high requirements of modern shield tunnel construction. Furthermore, with the continuous development of shield tunneling technology, the requirements for support equipment are becoming increasingly stringent, demanding not only stable support force but also high flexibility, ease of maintenance, and ease of use.

[0003] Therefore, this application proposes a mobile support trolley for shield tunnels, which achieves stable support for shield tunnels through the combined use of multiple trolleys. Utility Model Content

[0004] The purpose of this invention is to address the problems of insufficient support force, poor stability, and weak adaptability in existing support methods, which cannot meet the high requirements of modern shield tunnel construction. Furthermore, with the continuous development of shield tunneling technology, the requirements for support equipment are becoming increasingly stringent. It not only needs to provide stable support force but also requires high flexibility, ease of maintenance, and ease of use. Therefore, this invention proposes a mobile support trolley for shield tunnels.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mobile support trolley for shield tunneling includes multiple movable support trolleys. These multiple trolleys are fully housed within the internal space of the shield tunnel segment ring, forming a continuous support system that moves synchronously with the tunneling progress. A tunneling system, specifically a tunnel boring machine (TBM), is installed above the shield tunnel segment. The cutterhead diameter of the TBM matches the inner diameter of the tunnel segment. The support trolley includes:

[0007] Each trolley is arranged in sequence along the tunnel axis, and multiple trolleys move forward in sequence. During the forward movement, only one trolley does not support the shield segment, thus achieving span reduction support.

[0008] The trolley includes:

[0009] The main body of the portal frame is equipped with a walking mechanism at its bottom, which is used to realize the precise longitudinal movement and fine-tuning positioning of the trolley in the tunnel.

[0010] The top of the portal frame body is integrated with a retractable support component;

[0011] The retractable support assembly forms a surface contact support with the inner wall of the tunnel segment, and the support pressure is evenly distributed.

[0012] The portal frame body is equipped with a three-dimensional truss-type reinforcing component, which is made of ultra-high strength alloy steel. Stress dispersion devices are set at key nodes. The layout parameters of the reinforcing component are determined through finite element optimization analysis to improve the overall bending strength.

[0013] In one possible design, the retractable support assembly includes multiple mounting seats fixedly connected to the outer wall of the portal frame body. A hydraulic cylinder is fixedly connected to the top of the mounting seat. A support frame is fixedly connected to the piston rod of the hydraulic cylinder. A rubber pad is fixedly connected to the top of the support frame. A hydraulic lock is provided on the hydraulic cylinder. The hydraulic lock is composed of two parallel one-way valves.

[0014] In one possible design, the walking mechanism includes a moving wheel and a drive motor. The moving wheel is rotatably connected to the bottom of the portal frame body, and the drive motor is fixedly connected to the bottom of the portal frame body. The output shaft of the drive motor is fixedly connected to the rotating shaft of the moving wheel to drive the moving wheel to rotate.

[0015] In one possible design, the reinforcing components include a portal longitudinal bracing beam fixedly connected inside the portal frame body, and multiple portal diagonal braces are also fixedly connected inside the portal frame body.

[0016] In one possible design, the bottom inner wall of the tunnel segment is provided with multiple sleepers, which are used in conjunction with the traveling mechanism.

[0017] In one possible design, a crash jack is fixedly connected to one side of the portal frame body.

[0018] In one possible design, ladders are fixedly connected to both sides of the portal frame body.

[0019] In this application, the basic design principle of the trolley system is based on action and reaction forces, and span reduction support.

[0020] This vehicle, composed of multiple units, supports an already constructed shield tunnel. Above this tunnel, a second shield machine is constructing a parallel tunnel.

[0021] In this case, the longitudinal design includes 6 numbered trolleys as shown in the figure. Each trolley moves independently. When the trolley moves forward, only one section is suspended (unsupported), forming a span-reducing support, which keeps the length of the tunnel without support at any one time to about 5 meters.

[0022] The trolley moves forward as shown in the steps on the right. The advancing speed is matched with the tunnel boring machine above;

[0023] Key design features of this vehicle: The pressure at the top is transmitted through the tubular segments to the rubber pad, pad block, hydraulic cylinder, portal frame main body, walking and foundation jacks, track, and curved sleepers;

[0024] Detailed design: The cylinder is protected by a telescopic sleeve on the side to prevent the piston rod from bending, deforming, or leaking oil due to large non-axial forces. The cylinder contains a hydraulic lock, which is usually composed of two parallel check valves, using a cone valve or ball valve structure. When the cylinder stops working, the two check valves close under the action of spring force, and the oil in both chambers of the cylinder is completely sealed, forming a two-way hydraulic lock that can withstand external loads of 3-5 times the rated pressure without moving.

[0025] The pads are equipped with rubber to cushion the force and reduce damage to the tunnel segments;

[0026] Each trolley is equipped with a collision-proof screw jack to prevent damage to the motor due to misoperation.

[0027] Beneficial effects: Improved support stability: The mobile support trolley for shield tunnels disclosed in this application, through the combined use of multiple trolleys to support already constructed shield tunnels, effectively improves the support stability of the tunnel. Each trolley is equipped with a telescopic support component, which, through the cooperation of hydraulic cylinders and support frames, can closely fit the inner wall of the shield segment, providing stable support force.

[0028] Achieving span reduction support: The trolley system design takes into account the principle of action and reaction forces, and through span reduction support, the length of the tunnel that is not supported at any given time is controlled to about 5 meters. This design not only reduces the risks during tunnel construction but also improves construction efficiency.

[0029] High adaptability: The traveling mechanism uses a combination of wheels and a drive motor, allowing the trolley to move flexibly back and forth inside the tunnel lining segments, adapting to the needs of different construction environments. Meanwhile, the installation of sleepers further enhances the stability and reliability of the traveling mechanism.

[0030] Protecting the tunnel segments: The top of the support frame is equipped with a rubber pad, which can effectively buffer the impact of the support force on the tunnel segments and reduce damage to the segments. In addition, the side of the hydraulic cylinder is equipped with a telescopic sleeve to protect the cylinder and prevent its piston rod from bending, deforming or leaking oil due to large non-axial forces.

[0031] Collision-proof design: Each trolley is equipped with a collision-proof screw jack to prevent collisions between trolleys caused by misoperation, which could damage the motor and improve the safety and durability of the equipment.

[0032] Easy to maintain and use: Ladders are provided on both sides of the portal frame main body for easy maintenance and repair by staff. At the same time, the advancing speed of the trolley is matched with that of the tunnel boring machine above, ensuring the smooth progress of construction. Attached Figure Description

[0033] Figure 1 This is a front view structural diagram of a mobile support trolley for shield tunnels proposed in this utility model;

[0034] Figure 2 This is a side view of a mobile support trolley for shield tunnels proposed in this utility model.

[0035] Figure 3 This is a side view of the initial state of a mobile support trolley for a shield tunnel proposed in this utility model.

[0036] Figure 4 This is a side view of the structure of the No. 6 trolley hydraulic cylinder when it is retracted in the mobile support trolley for shield tunnels proposed in this utility model.

[0037] Figure 5 This is a side view of the structure of the No. 6 trolley after it has moved in the mobile support trolley for shield tunnels proposed in this utility model.

[0038] Figure 6 This is a side view of the structure of the No. 6 trolley cylinder after being lifted by the hydraulic cylinder of the mobile support trolley for shield tunneling proposed in this utility model.

[0039] Figure 7 This is a side view of the structure of the No. 5 trolley hydraulic cylinder after it is retracted in the mobile support trolley for shield tunnels proposed in this utility model.

[0040] Figure 8 This is a side view of the structure of the No. 5 trolley after it has moved in the mobile support trolley for shield tunnels proposed in this utility model.

[0041] In the diagram: 1. Support frame; 2. Hydraulic cylinder; 3. Mounting seat; 4. Portal frame main body; 5. Ladder; 6. Rubber pad; 7. Longitudinal beam of the portal frame; 8. Diagonal brace of the portal frame; 9. Traveling mechanism; 10. Sleeper; 11. Shield tunnel segment; 12. Shield machine. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0043] Example 1

[0044] Reference Figure 1-8A mobile support trolley for shield tunneling is disclosed. Multiple support trolleys are configured and completely housed within the internal space of a shield tunnel segment 11, forming a continuous support system that moves synchronously with the tunneling progress. A tunneling system, specifically a tunnel boring machine (TBM) 12, is installed above the shield tunnel segment 11. The cutterhead diameter of the TBM 12 matches the inner diameter of the tunnel segment. The support trolley includes:

[0045] Each trolley is arranged in sequence along the tunnel axis, and multiple trolleys move forward in sequence. During the forward movement, only one trolley does not support the shield segment 11, thus achieving span reduction support.

[0046] The trolley includes:

[0047] The portal frame body 4 has a traveling mechanism 9 at its bottom. The traveling mechanism 9 is used to realize the precise longitudinal movement and fine-tuning positioning of the trolley in the tunnel. The traveling mechanism 9 includes a moving wheel and a drive motor. The moving wheel is rotatably connected to the bottom of the portal frame body 4, and the drive motor is fixedly connected to the bottom of the portal frame body 4. The output shaft of the drive motor is fixedly connected to the rotating shaft of the rotating wheel to drive the moving wheel to rotate. Multiple sleepers 10 are provided on the bottom inner wall of the shield tunnel segment 11. The sleepers 10 are used in conjunction with the traveling mechanism 9.

[0048] The top of the portal frame body 4 is integrated with a telescopic support assembly. The telescopic support assembly includes multiple mounting seats 3 fixedly connected to the outer wall of the portal frame body 4. The top of the mounting seat 3 is fixedly connected to a hydraulic cylinder 2. The piston rod of the hydraulic cylinder 2 is fixedly connected to a support frame 1. The top of the support frame 1 is fixedly connected to a rubber pad 6. The hydraulic cylinder 2 is equipped with a hydraulic lock, which is composed of two parallel one-way valves.

[0049] The retractable support assembly forms a surface contact support with the inner wall of the shield tunnel segment 11, and the support pressure is evenly distributed.

[0050] The portal frame body 4 has a three-dimensional truss-type reinforcing component inside, which is made of ultra-high strength alloy steel. Stress dispersion devices are set at key nodes. The layout parameters of the reinforcing component are determined through finite element optimization analysis to improve the overall bending strength. The reinforcing component includes a portal longitudinal beam 7 fixedly connected inside the portal frame body 4. Multiple portal diagonal braces 8 are also fixedly connected inside the portal frame body 4.

[0051] This application can be used in the field of shield tunnels, or in other fields applicable to this application.

[0052] Example 2

[0053] refer to Figure 1-8An improvement based on Example 1: A mobile support trolley for shield tunnels, which is applied to the field of shield tunnels, has an anti-collision screw jack fixedly connected to one side of the portal frame body 4, and ladders 5 fixedly connected to both sides of the portal frame body 4.

[0054] However, as is well known to those skilled in the art, the working principles and wiring methods of the drive motor and cylinder 2 are commonplace and are all conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0055] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0056] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mobile support trolley for shield tunnels, characterized in that, The support trolley is set up in multiple units. The support trolley is completely housed in the internal space of the shield tunnel segment (11) ring, forming a continuous support system that moves forward synchronously with the tunneling process. A tunneling system is set up above the shield tunnel segment (11). The tunneling system is a shield machine (12). The diameter of the cutterhead of the shield machine (12) matches the inner diameter of the tunnel segment. Each support trolley is arranged in sequence along the tunnel axis. Multiple trolleys move forward in sequence, and only one trolley does not support the shield segment (11) during the forward movement, thus achieving span reduction support. The support trolley includes: The portal frame body (4) is equipped with a walking mechanism (9) at its bottom. The walking mechanism (9) is used to realize the precise longitudinal movement and fine-tuning positioning of the trolley in the tunnel. The top of the portal frame body (4) is integrated with a retractable support component; The retractable support assembly forms a surface contact support with the inner wall of the shield tunnel segment (11), and the support pressure is evenly distributed; The portal frame body (4) is equipped with a three-dimensional truss-type reinforcing component, which is made of ultra-high strength alloy steel. Stress dispersion devices are set at key nodes. The layout parameters of the reinforcing component are determined by finite element optimization analysis to improve the overall bending strength.

2. The mobile support trolley for shield tunnels according to claim 1, characterized in that, The retractable support assembly includes multiple mounting seats (3) fixedly connected to the outer wall of the portal frame body (4). A hydraulic cylinder (2) is fixedly connected to the top of the mounting seat (3). A support frame (1) is fixedly connected to the piston rod of the hydraulic cylinder (2). A rubber pad (6) is fixedly connected to the top of the support frame (1). A hydraulic lock is provided on the hydraulic cylinder (2). The hydraulic lock is composed of two parallel one-way valves.

3. The mobile support trolley for shield tunnels according to claim 1, characterized in that, The walking mechanism (9) includes a moving wheel and a drive motor. The moving wheel is rotatably connected to the bottom of the portal frame body (4). The drive motor is fixedly connected to the bottom of the portal frame body (4). The output shaft of the drive motor is fixedly connected to the rotating shaft of the rotating wheel to drive the moving wheel to rotate.

4. The mobile support trolley for shield tunnels according to claim 1, characterized in that, The reinforcing components include a portal longitudinal beam (7) fixedly connected inside the portal frame body (4), and multiple portal diagonal braces (8) are also fixedly connected inside the portal frame body (4).

5. A mobile support trolley for shield tunnels according to claim 1, characterized in that, The bottom inner wall of the shield tunnel segment (11) is provided with multiple sleepers (10), which are used in conjunction with the traveling mechanism (9).

6. A mobile support trolley for shield tunnels according to claim 1, characterized in that, A crash jack is fixedly connected to one side of the portal frame body (4).

7. A mobile support trolley for shield tunnels according to claim 1, characterized in that, Ladders (5) are fixedly connected to both sides of the portal frame body (4).

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