A kind of earth retaining device for subway shield tunnel segment assembly area

Abstract

The utility model relates to a kind of earth retaining device for subway shield tunnel segment assembling area, it includes fender, fender is set to segment inside and obstructs the joint place between two adjacent segments, the outer camber surface of fender is attached with the inner camber surface of segment, fender is set multiple blocks along the circumference of tunnel, a fender is set between every two adjacent segments, fender is connected between segment by connecting piece, two adjacent fenders are connected by clamping piece. The earth retaining device structure of the technical scheme of the application is simple, easy to install, can effectively prevent mud from the gap of two segments in assembling seep into shield tail, improve construction efficiency and safety.

Description

Technical Field

[0001] This utility model relates to the field of shield tunnel construction, and in particular to a retaining device for the segment assembly area of ​​a subway shield tunnel. Background Technology

[0002] Shield tunnel segments are the main assembly components in shield tunneling. They are the innermost lining structure of the tunnel and bear the responsibility of resisting soil pressure, groundwater pressure, and some special loads.

[0003] During the tunnel boring machine (TBM) excavation process, mud and slag can easily flow into the tail of the TBM along the joint between two adjacent segments in the assembly area, affecting the overall assembly of the segments and the TBM excavation, posing a significant safety hazard. Utility Model Content

[0004] To address the aforementioned technical problems, this application provides a retaining device for the segment assembly area of ​​a subway shield tunnel.

[0005] This application provides a retaining device for the segment assembly area of ​​a subway shield tunnel, which adopts the following technical solution: A retaining device for the segment assembly area of ​​a subway shield tunnel includes a retaining plate. The retaining plate is disposed inside the segment and covers the joint between two adjacent segments. The outer arc surface of the retaining plate fits against the inner arc surface of the segment. Multiple retaining plates are arranged along the circumference of the tunnel. One retaining plate is disposed between every two adjacent segments. The retaining plate is connected to the segment by a connector, and two adjacent retaining plates are connected by a snap-fit ​​connector.

[0006] Preferably, the connector includes a connecting rod, which is fixedly mounted on the outer wall of the retaining plate. The connecting rod is positioned near both radial ends of the retaining plate and the two connecting rods are symmetrically arranged. A connecting groove is provided on the inner wall of the segment for the connecting rod to pass through. The connecting groove extends through both sides of the segment along its axial direction, and the connecting groove corresponds one-to-one with the connecting rod.

[0007] Preferably, the cross-section of the connecting rod is dovetail-shaped, and the shape of the connecting groove is adapted to the shape of the connecting rod.

[0008] Preferably, the snap-fit ​​component includes a snap-fit ​​rod, which is fixedly mounted on the side wall of one radial side of the retaining plate. A snap-fit ​​groove is provided on the side wall of the other radial side of the retaining plate for the snap-fit ​​rod to pass through. The groove passes through both axial sides of the retaining plate, and the snap-fit ​​rod passes into the snap-fit ​​groove of an adjacent retaining plate.

[0009] Preferably, the locking rod is trapezoidal, the corners of the locking rod are rounded, and the shape of the locking groove is adapted to the shape of the locking rod.

[0010] Preferably, a sealing groove is provided on the side wall of the snap-fit ​​rod, and a sealing strip is provided in the sealing groove, the sealing strip being interference-fitted with the inner wall of the snap-fit ​​groove.

[0011] Preferably, the inner wall of the retaining plate is provided with a handle for easy gripping and moving the retaining plate.

[0012] Preferably, the handle is located at the center of each retaining plate in both the axial and radial directions.

[0013] In summary, this application includes the following beneficial technical effects: 1. The retaining device has a simple structure, high fit, and convenient installation. It can effectively prevent mud from seeping into the shield tail from the gap between the two segments during assembly, thus improving construction efficiency and safety. When it is necessary to fix the assembled segments by welding or other processes to fix the adjacent segments, the retaining plate can be removed or moved directly to the next segment in the assembly process. 2. During the temporary flushing of the tunnel segments, water can also be prevented from flowing into the shield tail, ensuring the assembly of the tunnel segments and the tunnel boring machine's excavation. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a retaining device for the segment assembly area of ​​a subway shield tunnel, as described in this application.

[0015] Figure 2 This is used to illustrate the embodiments of this application. Figure 1 A magnified structural diagram of point A in the middle.

[0016] Explanation of reference numerals in the attached drawings: 1. Segment; 2. Retaining plate; 3. Connecting rod; 31. Connecting groove; 4. Snap-fit ​​rod; 41. Snap-fit ​​groove; 5. Sealing groove; 51. Sealing strip; 6. Handle. Detailed Implementation

[0017] The following is in conjunction with the appendix Figure 1-2 This application will be described in further detail.

[0018] This application discloses a retaining device for the segment assembly area of ​​a subway shield tunnel.

[0019] Reference Figure 1-2 The retaining device used in the segment assembly area of ​​a subway shield tunnel includes a retaining plate 2. The retaining plate 2 is set inside the segment 1 and covers the joint between two adjacent segments 1. The outer arc surface of the retaining plate 2 fits into the inner arc surface of the segment 1. Multiple retaining plates 2 are set along the circumference of the tunnel. One retaining plate 2 is set between each two adjacent segments 1. The retaining plate 2 is connected to the segment 1 by a connector, and two adjacent retaining plates 2 are connected by a snap-fit ​​connector.

[0020] The connector includes connecting rods 3, which are fixedly mounted on the outer wall of the retaining plate 2. The connecting rods 3 are positioned near both radial ends of the retaining plate 2, with two connecting rods 3 arranged symmetrically. Connecting grooves 31 are formed on the inner wall of the segment 1 for the connecting rods 3 to pass through. The connecting grooves 31 penetrate both axial sides of the segment 1, and each connecting groove corresponds to one connecting rod 3. The connecting rod 3 has a dovetail-shaped cross-section, and the shape of the connecting groove 31 matches the shape of the connecting rod 3, improving the connection stability between the retaining plate 2 and the segment 1.

[0021] The snap-fit ​​component includes a snap-fit ​​rod 4, which is fixedly mounted on the side wall of one radial side of the retaining plate 2. A snap-fit ​​groove 41 is provided on the other radial side of the retaining plate 2 for the snap-fit ​​rod 4 to pass through. A connecting groove 31 penetrates both axial sides of the retaining plate 2. The snap-fit ​​rod 4 passes into the snap-fit ​​groove 41 of an adjacent retaining plate 2. The snap-fit ​​rod 4 is trapezoidal in shape with rounded corners. The shape of the snap-fit ​​groove 41 matches the shape of the snap-fit ​​rod 4, improving the connection stability between the retaining plates 2.

[0022] A sealing groove 5 is provided on the side wall of the snap-fit ​​rod 4, and a sealing strip 51 is provided in the sealing groove 5. The sealing strip 51 is interference-fitted with the inner wall of the snap-fit ​​groove 41 to improve the sealing between the retaining plates 2, thereby improving the sealing between the retaining plates 2 and the segments 1, and can effectively prevent the mud from leaking into the shield tail from the gap between the two segments 1 during assembly.

[0023] The inner wall of the retaining plate 2 is provided with handles 6 for easy gripping and moving the retaining plate 2. The handles 6 are located in the middle of the axial and radial directions of each retaining plate 2, which improves the uniformity of force on the retaining plate 2.

[0024] The implementation principle of a retaining device for a segment assembly area in a subway shield tunnel according to an embodiment of this application is as follows: When temporarily installing the retaining device in the assembly area, first install the bottom retaining plate 2, so that the connecting rod 3 passes through the connecting groove 31, then assemble the retaining plates 2 on both sides, and then assemble the top retaining plate 2, so that the corresponding connecting rod 3 and clamping rod 4 pass through the corresponding connecting groove 31 and clamping groove 41, so that the lower retaining plate 2 can improve the support of the upper retaining plate 2. Finally, when it is necessary to fix the assembled segment 1 by welding or other processes to fix two adjacent segments 1, the retaining plate 2 is removed or directly moved to the segment 1 in the next assembly process.

[0025] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A retaining device for use in the segment assembly area of ​​a subway shield tunnel, characterized in that: The system includes retaining plates (2), which are installed inside the tunnel segments (1) and cover the joint between two adjacent tunnel segments (1). The outer arc surface of the retaining plate (2) is in contact with the inner arc surface of the tunnel segment (1). Multiple retaining plates (2) are installed along the circumference of the tunnel. One retaining plate (2) is installed between each two adjacent tunnel segments (1). The retaining plates (2) are connected to the tunnel segments (1) by connectors, and two adjacent retaining plates (2) are connected by snap-fit ​​connectors.

2. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 1, characterized in that: The connector includes a connecting rod (3), which is fixedly installed on the outer wall of the retaining plate (2). The connecting rod (3) is located near the radial ends of the retaining plate (2) and the two connecting rods (3) are symmetrically arranged. A connecting groove (31) is provided on the inner wall of the pipe segment (1) for the connecting rod (3) to pass through. The connecting groove (31) passes through both sides of the pipe segment (1) in the axial direction. The connecting groove (31) corresponds to the connecting rod (3) one by one.

3. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 2, characterized in that: The cross-section of the connecting rod (3) is dovetail-shaped, and the shape of the connecting groove (31) is adapted to the shape of the connecting rod (3).

4. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 3, characterized in that: The snap-fit ​​component includes a snap-fit ​​rod (4), which is fixedly installed on the side wall of the retaining plate (2) on one radial side. The side wall of the retaining plate (2) on the other radial side is provided with a snap-fit ​​groove (41) for the snap-fit ​​rod (4) to pass through. The connecting groove (31) penetrates both sides of the retaining plate (2) in the axial direction. The snap-fit ​​rod (4) is inserted into the snap-fit ​​groove (41) of an adjacent retaining plate (2).

5. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 4, characterized in that: The snap-fit ​​rod (4) is trapezoidal, and the corners of the snap-fit ​​rod (4) are rounded. The shape of the snap-fit ​​groove (41) is adapted to the shape of the snap-fit ​​rod (4).

6. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 4, characterized in that: A sealing groove (5) is provided on the side wall of the snap-fit ​​rod (4), and a sealing strip (51) is provided in the sealing groove (5). The sealing strip (51) is interference-fitted with the inner wall of the snap-fit ​​groove (41).

7. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 1, characterized in that: The inner wall of the retaining plate (2) is provided with a handle (6) for easy gripping and moving the retaining plate (2).

8. The retaining device for the segment assembly area of ​​a subway shield tunnel according to claim 7, characterized in that: The handle (6) is located at the center of each retaining plate (2) in both the axial and radial directions.

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