Progressive control method of railway open trench tunnel lining deformation joint leakage water
A technology of open-cut tunnels and deformation joints, applied in water conservancy projects, underwater structures, artificial islands, etc., can solve repeated water leakage, cannot completely block leaking water channels, and cannot achieve leaking water channel blocking And other issues
Pending Publication Date: 2019-04-12
CHINA RAILWAY DESIGN GRP CO LTD
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[0003] In actual engineering, the method of grouting pre-embedded grouting pipes is usually used to control the leakage of deformation joints in the lining, but the pre-embedded grouting pipes are often damaged during the tunnel construction process, and this method only affects the deformation joints. Grouting at a certain position of the deformation joint cannot completely block the leakage water channel; after the renovation is completed, new leakage water will often be formed at another position of the deformation joint, resulting in r
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[0070] Example one
[0071] A newly-built railway tunnel has a starting and ending mileage of DK286+250~DK293+550 (excluding sections DK288+400~DK290+250), and the total length of the section tunnel is 5450 m. The starting and ending length of the tunnel entrance section of a certain section of the railway station front project is DK286+250~DK288+400, and the length is 2150 m. The design adopts the open-cut method. The tunnel area is distributed with surface water such as a tributary of a river. Although the river has been cut off, there is still a small amount of water locally. The water depth is 0.5~1.5 m, which is corrosive to the concrete structure with chloride salt, and the environmental effect level is L1. The groundwater in the tunnel area is mainly Quaternary pore water and bedrock fissure water. During the survey, the buried depth of the groundwater level was 0.9~3.5 m (elevation 4.05~12.9 m). The groundwater level was relatively high and seeped along the joints and fi...
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The invention discloses a progressive control method of railway open trench tunnel lining deformation joint leakage water. The method comprises the following steps of performing field investigation onthe deformation joint leakage water condition; cleaning a deformation joint; drilling a hole near the deformation joint; cleaning the drill hole; installing a grouting nozzle; burying a grouting pipeinto the deformation joint; performing grouting through an outer side inclined grouting hole and an inner side vertical grouting hole; performing grouting through a middle grouting pipe; after the grouting, performing seepage water inspection onto the deformation joint; cutting away the externally exposed grouting nozzle; and performing sealing treatment. By aiming at the characteristics of a railway open trench tunnel, the invention provides the progressive control method of railway open trench tunnel lining deformation joint leakage water for implementing the complete sealing and blockage on a leakage water passage; the progressive grouting sealing and blockage on the deformation joint is realized through sequentially performing grouting on the outer side inclined grouting hole, the inner side vertical grouting hole and the middle grouting pipe; the leakage water passage is completely cut; and the guarantee is provided for the safe service of a tunnel structure.
Description
technical field [0001] The invention belongs to the field of railway tunnel engineering, and in particular relates to a progressive treatment method for leaking water from deformation joints in lining deformation joints of railway open-cut tunnels. Background technique [0002] In recent years, my country's railway industry has developed rapidly, and the number of tunnel projects has also increased significantly. With the increase of operation and service time, tunnel diseases appear in batches. If they cannot be rectified and maintained in time, the normal operation of the line will be seriously affected. Water seepage is one of the most common diseases of tunnel lining. Leakage of lining will cause various diseases, deteriorate the operating environment, and seriously threaten driving safety. It must be rectified and dealt with in time. Among them, deformation joints are the weak link of tunnel waterproofing. According to statistics, nearly 30% of the water leakage occurs ...
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Login to view more IPC IPC(8): E02D29/045E02D29/16E02D31/02
CPCE02D29/045E02D29/16E02D31/02
Inventor 张继清王秀妍郭剑勇宋冉张桂扬崔涛
Owner CHINA RAILWAY DESIGN GRP CO LTD
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