The anti-seepage structure and construction method of the support of the high-pressure water-rich solution cavity section of the tunnel
A construction method and waterproof structure technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve the problems that the curtain grouting structure cannot resist the water pressure and damage of the dissolved cavity
Active Publication Date: 2019-11-29
中铁十一局集团第五工程有限公司 +1
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Problems solved by technology
However, for the high-pressure water-rich dissolution cavity, the curtain grouting structure is not yet able to resist the water pressure of the solution cavity, and once water and mud inrush occur, it will also cause great damage to the normal support sections other than the solution cavity section
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Embodiment Construction
[0022] Below by embodiment and in conjunction with accompanying drawing, the present invention will be further described:
[0023] to combine figure 1 — image 3 As shown, an anti-seepage structure for the support of the high-pressure water-rich dissolved cavity section of the tunnel is mainly composed of a double-layer primary support, a first-layer waterproof structure, and a double-layer secondary lining arranged sequentially in the inner circumferential direction of the high-pressure water-rich dissolved cavity section A. And the anti-permeability isolation section B arranged at both ends of the high-pressure water-rich dissolution chamber section A.
[0024] like figure 2 As shown, the double primary support consists of the first layer of primary support 1 and the second layer of primary support 2. Both the primary support 1 of the first layer and the primary support 2 of the second layer adopt a circular ring structure of shotcrete shotcrete with a full-ring steel ar...
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The invention discloses a support and anti-seepage structure of a tunnel high-pressure water-rich solution cavity section, which comprises a double-layer initial support, first-layer waterproof structure and double-layer secondary lining which are sequentially arranged in the inner ring of the high-pressure water-rich dissolving cavity section, an anti-seepage isolating section arranged at two ends of the high-pressure water-rich solution cavity section, and the double-layer secondary lining is composed of a first layer secondary lining and a second layer secondary lining, the construction seams of the first layer secondary lining and second layer secondary lining are staggered, the anti-seepage isolating section uses an initial support and a secondary lining, and the secondary lining is closely attached to the initial support. Meanwhile, the invention also discloses a construction method of the support and anti-seepage structure tunnel high-pressure water-rich solution cavity section.Not only can that the structural strength of the solution cavity section is sufficient to resist the high water pressure of the solution cavity be ensured, but also the damage to the normal support section other than the solution cavity section can be prevented when karst underground water and mud in rush happen in the solution cavity.
Description
technical field [0001] The invention relates to a tunnel construction technique, in particular to a safe construction method for a high-pressure water-rich dissolved cavity section, which can ensure that the structural strength of the dissolved cavity section is sufficient to resist high water pressure in the dissolved cavity, and prevent water and mud inrush in the dissolved cavity section When, it will cause damage to the normal support section other than the dissolved cavity section. Background technique [0002] At present, when constructing a dissolved cavity tunnel, curtain grouting is usually used to ensure the stability of the surrounding rock in the dissolved cavity section and prevent water seepage in the dissolved cavity section. However, for the high-pressure water-rich dissolution cavity, the curtain grouting structure cannot resist the water pressure of the solution cavity, and once water and mud inrush occur, it will also cause great damage to the normal suppo...
Claims
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IPC IPC(8): E21D11/38E21D11/10
CPCE21D11/105E21D11/107E21D11/38
Inventor 刘俊翁长根管强陈中华李勇军李勇熊晓晖臧昊熊军
Owner 中铁十一局集团第五工程有限公司