Structure for preventing water at back of tunnel lining from longitudinally streaming

A longitudinal and lining technology, applied in tunnel lining, tunnel, wellbore lining, etc., can solve the problems of structural damage and rising water pressure of tunnel lining, and achieve the effect of reducing maintenance costs, increasing diameter, and structural safety and reliability

Active Publication Date: 2011-03-16
CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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Problems solved by technology

[0005] 2. Traditional longitudinal blind pipes are arranged along the longitudinal length of the tunnel, which can easily cause groundwater in water-rich areas to flow to the general area, which may cause the water pressure behind the tunnel lining in the general area to rise and cause structural damage

Method used

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  • Structure for preventing water at back of tunnel lining from longitudinally streaming
  • Structure for preventing water at back of tunnel lining from longitudinally streaming
  • Structure for preventing water at back of tunnel lining from longitudinally streaming

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Embodiment ： Embodiment and 1 ，， and 。 specific Embodiment approach

[0026] 1) The water blocking ring 6 is located on the outer edge of the secondary lining 3, and its general size is 1×1m (width×height). The size of the water blocking ring can be determined according to the actual situation on site, and the waterproof board between different water-rich sections can be cut off 2. The vertical drainage pipe 5 is poured integrally with the secondary lining 3 to form an integral body to prevent the longitudinal flow of underground water.

[0027] 2) A certain number of radial grouting pipes 7 are reserved along the radial direction of the water blocking ring 6. The diameter, material and quantity of the pre-embedded radial grouting pipes can be determined according to the actual geological conditions, but generally should not be less than 5 , using the radial grouting pipe 7 to backfill the gap between the water blocking ring 7 and the surrounding rock, and at the same time, grouting a certain range of surrounding rock behind the water blocking ri...

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Abstract

The invention relates to a structure for preventing water at the back of a tunnel lining from longitudinally streaming, which is characterized in that: at least one convex water blocking ring is arranged on the outer surface of a secondary lining corresponding to a waterproof board along the circumferential direction; and the water blocking ring cuts off the waterproof board and a longitudinal water drain pipe and penetrates into a primary support and an adjoining rock so as to prevent underground water from longitudinally streaming. The structure can realize the zonal and sectional drainage of a tunnel in sections with different watery degrees; and a tunnel waterproof and drainage system is pertinently arranged according to the watery degree of the underground water, so that the requirement on the drainage capacity of the tunnel is met, engineering cost is saved, maintenance cost is reduced, and the phenomena of cracking, leakage, water jetting and the like of weak sections of the lining caused by the streaming of the underground water at the back of the lining are avoided.

Description

technical field [0001] The invention relates to the field of tunnels and underground engineering, in particular to a structure for preventing longitudinal flow of water behind the tunnel lining, which can solve the problem of longitudinal flow of groundwater in different water-rich sections of the tunnel, and is mainly used in the field of tunnels and underground engineering. Background technique [0002] Water leakage is a relatively common problem in tunnels and underground projects, such as Dayaoshan Tunnel, Dabashan Tunnel and Zhongliangshan Tunnel. For the remediation of tunnel leakage diseases, the cost is high and the cure is difficult. [0003] At present, the common water leakage problem in tunnel engineering mainly has the following reasons: [0004] 1. The installation of the waterproof board makes the composite lining structure into "three skins", that is, the primary support of the tunnel, the waterproof board, and the secondary lining. Groundwater can easily f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38
Inventor 苗德海朱丹殷怀连王伟颜志伟李强曹言坤黎代仁
Owner CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP
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