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A shrinkable segment for demolition inside a tunnel and its construction method

A technology of shrinking tubes and tunnels, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as waste, damage, and lack of solutions, and achieve the effects of saving overall time, saving construction period, and improving efficiency

Active Publication Date: 2019-08-13
JINAN RAILWAY TRANSPORT GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inner diameter of the segment is smaller than the outer diameter, and the contact surfaces of the six segments in a ring segment are along the radial direction, and the self-stabilization performance is better. Therefore, under normal circumstances, even if the segments are not connected by bolts, they will The outer pressure makes the hoop tighter and tighter, and it cannot be removed from the inner side
Therefore, during the construction process, the concrete segments are often blasted or crushed with a heavy hammer, which will cause irreparable damage to the entire ring segment or adjacent segments, and direct discarding will cause huge waste
[0004] To sum up, in the prior art, there is still no effective solution to the problem that the shield segment is difficult to dismantle and cannot be reused

Method used

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  • A shrinkable segment for demolition inside a tunnel and its construction method
  • A shrinkable segment for demolition inside a tunnel and its construction method
  • A shrinkable segment for demolition inside a tunnel and its construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In a typical implementation of the present application, such as Figure 8-11 As shown, there is provided a shrinkable segment for removal inside the tunnel, which includes a plurality of standard blocks 3 adjacent to and around an arc-shaped structure. Both ends of the arc-shaped structure are close to an adjacent block 2. A capping block 4 is arranged between them, and the standard block 3, the adjacent block 2 and the capping block 4 form a cylindrical structure;

[0048] There are movable wings 5 ​​on both sides of the capping block 4, and a telescopic part 6 is arranged inside the capping block 4, and the telescopic part 6 is connected with the movable wing 5, and the telescopic part 6 can drive the movable flap 5 to rotate or move to push against the adjacent block 2 .

[0049] The segment of the present invention does not change the conventional method of assembling the conventional segment of the shield machine, and replaces the K concrete segment (capping block...

Embodiment 2

[0058] like Figure 12-14 As shown, in this embodiment, the movable wing plate 5 of this embodiment is no longer fixed to the capping block, and both ends of the movable wing plate 5 are suspended and nested in the side of the capping block 4, and the connection between the movable wing plate 5 and the screw rod 6-1 Fixed connection between.

[0059] There are multiple telescopic parts 6, and a plurality of telescopic parts 6 are arranged in parallel. The telescopic parts 6 are arc-shaped and parallel to the capping block 4. They are all arranged radially along the capping block 4 . During the expansion and contraction process of the screw rod 6-1, the movable wing plate 5 expands outwards and moves along an arc, and then presses against the adjacent block after fitting with the end surface of the adjacent block.

[0060] Others are the same as in Example 1.

[0061] In another typical implementation of the present application, a construction method for a shrinkable segment...

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Abstract

The invention discloses a retractable segment for being removed in a tunnel and a construction method. The problems of difficult removal and unrepeatable use of a shield segment are solved, and by arranging telescoping members and moving wing plates at the positions of top sealing blocks, the segment can be removed in the tunnel without breaking and can be reused. According to the technical scheme, the retractable segment comprises a plurality of standard blocks which are connected to form an arc-shaped structure in an adjacent surrounding mode, adjacent-connecting blocks are closely attachedto both ends of the arc-shaped structure, the top sealing blocks are arranged between the adjacent-connecting blocks, and the standard blocks, the adjacent-connecting blocks and the top sealing blocksconstitute a cylindrical structure; and the moving wing plates are arranged on the two sides of the top sealing blocks, the telescoping members are arranged in the top sealing blocks, the telescopingmembers are connected with the moving wing plates, and the telescoping members can drive the moving wing plates to rotate or move to abut against the adjacent-connecting blocks.

Description

technical field [0001] The invention relates to the technical field of shield tunneling segments, in particular to a shrinkable segment used for dismantling inside a tunnel and a construction method. Background technique [0002] At present, various cities are vigorously constructing subways, and the degree of mechanization of shield tunneling is relatively high. Segments are assembled in time after excavation, and the segments are used to provide jack reaction force to push the shield machine forward. The requirements for segment assembly quality are relatively high. At present, concrete segments are used. A whole ring of segments is assembled into a circle by 6 segments in a certain order to support the tunnel. The capping block has a taper (joint angle) in the tunnel axial direction. When assembling segments Finally, the capping block is inserted horizontally to squeeze the entire ring segments tightly, and the segments are fixed to each other by high-strength bolts in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/08E21D11/40
CPCE21D11/08E21D11/40
Inventor 曹正龙刘凤洲石锦江刘浩王丹
Owner JINAN RAILWAY TRANSPORT GRP CO LTD
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