Grouting reinforcement device for preventing shield segment from floating upwards

Abstract

The utility model discloses a grouting reinforcement device for preventing a shield segment from floating, which belongs to the technical field of anti-floating of tunnel segments and comprises arc-shaped channel steel, an opening side of the arc-shaped channel steel is positioned on an outer arc surface, protective pipes are fixedly connected onto the arc-shaped channel steel at intervals, grouting anchor rods are fixedly connected into the protective pipes, and drainage devices are arranged on the protective pipes. The drainage device is used for draining accumulated water in the protection pipe. The shield segments are fixedly provided with the protection pipes, the protection pipes penetrate into the inner wall of the tunnel through the grouting anchor rods for grouting and anchoring, and the notches of the arc-shaped channel steel are filled with the concrete after anchoring, so that the shield segments below the tunnel form a reinforced whole, on one hand, the arc-shaped pipes extend into drainage ditches on the two sides of a road platform, and on the other hand, the arc-shaped pipes extend into drainage ditches on the two sides of the road platform; and on the other hand, the arc-shaped channel steel and the subsequently-poured road platform form a whole, and the anti-floating effect of the shield segment is higher.

Description

Technical Field

[0001] This utility model relates to the field of tunnel segment anti-buoyancy technology, and in particular to a grouting reinforcement device for preventing shield tunnel segments from floating. Background Technology

[0002] During the tunnel boring machine (TBM) advancement process, there is a construction gap between the TBM and the tunnel segments. Grouting is often used to fill the construction gap. Due to the influence of groundwater and grout, the tunnel segments are prone to floating, which can cause damage to the tunnel segments, deviate from the design axis, and thus fail to meet the design requirements, seriously endangering the safety of the tunnel.

[0003] Existing technologies, such as the patent publication (publication) number: CN213063587U, describe a device for preventing the floating of tunnel segments in slurry shield tunnels in full-section rock formations. This device involves installing grouting anchors on the segments at the bottom of the shield tunnel. However, the grouting anchors can only anchor one shield segment at a time, resulting in insufficient securing between adjacent segments. Furthermore, in water-rich areas, the subsequent infiltration of groundwater cannot be effectively drained, posing a potential threat to the safe operation of the tunnel. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a grouting reinforcement device to prevent shield tunnel segments from floating, thereby solving the problems existing in the prior art.

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

[0006] A grouting reinforcement device for preventing shield tunnel segments from floating includes an arc-shaped channel steel, with the open side of the arc-shaped channel steel located on the outer arc surface. Protective pipes are fixedly connected to the arc-shaped channel steel at intervals. Grouting anchors are fixedly connected inside the protective pipes. The protective pipes are equipped with a drainage device for draining water accumulated inside the protective pipes.

[0007] Preferably, the drainage device includes two plugs, which are fixedly connected to both ends of the inner cavity of the protective pipe. The plugs are fixedly connected to the grouting anchor rods, and a seepage cavity is formed between the two plugs. A filter metal mesh is provided on the outer wall of the protective pipe corresponding to the seepage cavity.

[0008] An arc-shaped pipe is fixedly connected to the upper end of the protective pipe, and the arc-shaped pipe extends to the outer end of the arc-shaped channel steel.

[0009] Preferably, the arc-shaped channel steel is provided with through holes.

[0010] Preferably, the through hole has a circular or regular polygonal structure.

[0011] Preferably, anchoring holes are arranged in a ring array around the through hole, and anchor hooks are installed in the anchoring holes.

[0012] Preferably, the upper end of the protective pipe is provided with several inclined plates arranged in an array, and a slot is provided between two adjacent inclined plates. The upper end of the grouting anchor is provided with a diversion hole, and the diversion hole is provided in correspondence with the slot.

[0013] Preferably, a liquid level sensor is fixedly connected to the inner cavity of the protective tube.

[0014] The advantages of this utility model are as follows: The grouting reinforcement device for preventing shield tunnel segments from floating provided by this utility model uses a protective pipe fixedly installed on the shield tunnel segment. The protective pipe is anchored to the inner wall of the tunnel by grouting anchor rods. After anchoring, the groove of the arc-shaped channel steel is filled with concrete, so that multiple shield tunnel segments under the tunnel form a reinforced whole. On the one hand, the arc-shaped pipe extends into the drainage ditches on both sides of the platform. On the other hand, the arc-shaped channel steel forms a whole with the subsequently poured platform, making the shield tunnel segment more resistant to floating. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the basic structure of this utility model;

[0016] Figure 2 yes Figure 1 Enlarged view of section E in the image;

[0017] Figure 3 This is a schematic diagram of the connection structure between the protective pipe and the arc-shaped pipe. 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 accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Example 1

[0019] like Figures 1 to 3 As shown, this utility model provides a grouting reinforcement device for preventing shield tunnel segments from floating. It includes an arc-shaped channel steel 1, which is bent by a roller bending machine to adapt to the curvature of the tunnel segments. The open side of the arc-shaped channel steel 1 is located on the outer arc surface. The channel opening of the arc-shaped channel steel 1 is filled with concrete, allowing it to be cast integrally with the subsequent road platform 20, thus improving the overall structural strength. Protective pipes 2 are fixedly connected at intervals on the arc-shaped channel steel 1. Grouting anchor rods 3 are fixedly connected inside the protective pipes 2. Installation holes are provided in the tunnel segments at the bottom, and process holes are drilled into the tunnel wall. After the protective pipes 2 are inserted into the process holes, the grouting anchor rods 3 are inserted and fixed inside the protective pipes 2. A drainage device is provided in the protective pipes 2 to drain accumulated water. A liquid level sensor 10 is fixedly connected to the inner cavity of the protective pipes 2. In water-rich areas, a drainage pump can be pre-installed in the protective pipes 2. In non-water-rich soft soil areas, only drainage channels flow out. If necessary, drainage pipes can be inserted for drainage maintenance.

[0020] The drainage device includes two plugs 4, which are fixedly connected to both ends of the inner cavity of the protective pipe 2. The plugs 4 are fixedly connected to the grouting anchor rods 3, forming a seepage cavity between the two plugs 4. A filter metal mesh 41 is installed on the outer wall of the protective pipe 2 corresponding to the seepage cavity. An arc-shaped pipe 42 is fixedly connected to the upper end of the protective pipe 2. The arc-shaped pipe 42 extends to the outer end of the arc-shaped channel steel 1 and is fitted with a plug. Seepage water from the outside of the tunnel enters the protective pipe 2 through the filter metal mesh 41, which facilitates monitoring and centralized drainage. The protective pipe 2 and the grouting anchor rods 3 form a reinforcement structure while also serving a drainage function.

[0021] This utility model involves fixing a protective pipe 2 onto the shield tunnel segments. The protective pipe 2 is then anchored to the inner wall of the tunnel by grouting anchor rods 3. After anchoring, the groove of the arc-shaped channel steel 1 is filled with concrete, so that multiple shield tunnel segments below the tunnel form a reinforced whole. On the one hand, the arc-shaped pipe 42 extends into the drainage ditches on both sides of the platform 20. On the other hand, the arc-shaped channel steel 1 forms a whole with the subsequently poured platform 20, making the shield tunnel segments more resistant to floating.

[0022] Furthermore, the arc-shaped channel steel 1 is provided with through holes 11, which are circular or regular polygonal in structure. Anchor holes 12 are arranged in a ring around the through holes 11, and anchor hooks 13 are provided in the anchor holes 12. The anchor hooks 13 are surrounded by the concrete of the subsequently poured track platform 20. The anchor hooks 13 and the subsequent pouring of the track platform 20 form an anchor, resulting in a strong overall structure. The through holes 11 facilitate the overflow of concrete from the groove of the arc-shaped channel steel 1, allowing it to be integrated with the subsequent pouring of the track platform 20.

[0023] The upper end of the protective pipe 2 is arranged with several inclined plates 21. The inclined plates 21 are cut with slots at intervals at the upper end of the protective pipe 2 by a cutting machine and then widened and welded to the arc-shaped channel steel 1. A slot is set between two adjacent inclined plates 21. The upper end of the grouting anchor rod 3 is provided with a diversion hole 31, which is set in correspondence with the slot. Grouting anchor rod 3 injects grout into the inner wall of the tunnel on one side. Part of the grout overflows from the diversion hole 31 and the slot, filling the slot of the arc-shaped channel steel 1, so that the anti-buoyancy reinforcement structure of this utility model forms a whole and the anti-buoyancy strength is higher than that of a single pipe segment anchorage.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grouting reinforcement device for preventing shield tunnel segments from floating, comprising an arc-shaped channel steel (1), the open side of the arc-shaped channel steel (1) being located on the outer arc surface, and protective pipes (2) being fixedly connected at intervals on the arc-shaped channel steel (1), characterized in that: The grouting anchor rod (3) is fixedly connected inside the liner (2). The liner (2) is equipped with a drainage device for draining water accumulated inside the liner (2).

2. The grouting reinforcement device for preventing shield tunnel segments from floating according to claim 1, characterized in that: The drainage device includes two plugs (4), which are fixedly connected to both ends of the inner cavity of the protective pipe (2). The plugs (4) are fixedly connected to the grouting anchor (3), and a seepage cavity is formed between the two plugs (4). A filter metal mesh (41) is set on the outer wall of the protective pipe (2) corresponding to the seepage cavity. The upper end of the protective tube (2) is fixedly connected to the arc-shaped tube (42), which extends to the outer end of the arc-shaped channel steel (1).

3. The grouting reinforcement device for preventing shield tunnel segments from floating according to claim 1, characterized in that: The arc-shaped channel steel (1) is provided with through holes (11).

4. The grouting reinforcement device for preventing shield tunnel segments from floating according to claim 3, characterized in that: The through hole (11) has a circular or regular polygonal structure.

5. A grouting reinforcement device for preventing shield tunnel segments from floating according to claim 3, characterized in that: Anchor holes (12) are arranged in a ring around the through hole (11), and anchor hooks (13) are provided in the anchor holes (12).

6. The grouting reinforcement device for preventing shield tunnel segments from floating according to claim 3, characterized in that: The upper end of the protective pipe (2) is arranged with several inclined plates (21), and a slot is provided between two adjacent inclined plates (21). The upper end of the grouting anchor rod (3) is provided with a diversion hole (31), and the diversion hole (31) is provided in correspondence with the slot.

7. The grouting reinforcement device for preventing shield tunnel segments from floating according to claim 1, characterized in that: The liquid level sensor (10) is fixedly connected to the inner cavity of the protective tube (2).

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