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A regional overall treatment method for water seepage and cracks in open-cut tunnels of high-speed railways

A technology for open-cut tunnels and high-speed railways. It is used in tunnels, tunnel linings, and earth-moving drilling. It can solve the problems of repeated water leakage, difficulty in forming a complete structural waterproof system, and consumption of manpower, material resources and financial resources.

Active Publication Date: 2021-05-14
CHINA RAILWAY DESIGN GRP CO LTD
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Problems solved by technology

However, this method only remediates the diseased parts. After the remediation is completed, new water leakage or cracks are often formed in the lining parts where no diseases have been found before, resulting in repeated repairs and consuming a lot of manpower, material and financial resources.
[0004] Because the leakage plugging method in the prior art has the problems of easy to cause repeated water leakage and difficult to form a complete structural waterproof system, it is necessary to consider the characteristics of high-speed railway open-cut tunnels, especially for the large number of leakage water cracks and the distribution range. In view of the complex situation of the wide area, a method for regional overall treatment of water leakage and cracks in high-speed railway open-cut tunnels, which makes the lining form a new waterproof system, is proposed to provide a guarantee for the safe service of the tunnel structure

Method used

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  • A regional overall treatment method for water seepage and cracks in open-cut tunnels of high-speed railways
  • A regional overall treatment method for water seepage and cracks in open-cut tunnels of high-speed railways
  • A regional overall treatment method for water seepage and cracks in open-cut tunnels of high-speed railways

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Embodiment 1

[0056] A newly built high-speed railway tunnel has a starting and ending mileage of DK286+250~DK293+550 (excluding DK288+400~DK290+250), and the total length of the interval tunnel is 5450 m. The tunnel entrance section of a tender section in front of the railway station has a mileage of DK286+250~DK288+400 and a length of 2150 m. It is designed to be constructed by open-cut method. Surface water such as a tributary of a river is distributed in the tunnel area. Although the river has stopped flowing, there is still a small amount of water locally, with a water depth of 0.5-1.5 m. It is corrosive to concrete structures with chloride salts, and the environmental action level is L1. The groundwater in the tunnel area is mainly Quaternary pore water and bedrock fissure water. During the survey period, the groundwater level was buried at a depth of 0.9-3.5 m (elevation 4.05-12.9 m). The groundwater level was relatively high, and it infiltrated along the joints and fissures, forming...

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Abstract

The invention discloses a regional overall treatment method for leaking water and cracks in open-cut tunnels of high-speed railways. The grout forms a new waterproof film; checks for water leakage after grouting; cuts off the exposed grouting nozzle and seals it. The present invention aims at the characteristics of high-speed railway open-cut tunnels, especially for complex tunnel situations where there are many leaking water cracks and a wide distribution range, and the sealing of one crack will easily cause the leakage of surrounding unplugged cracks. The high-strength high-speed railway open-cut tunnel leakage and crack regional overall treatment method adopts the whole section as a whole ring grouting, and the grouting holes are evenly arranged in each ring, which can realize uniform grouting at the vault, arch waist and side walls, etc. Through regional overall improvement, a new waterproof system will be formed to provide guarantee for the safe service of the tunnel structure.

Description

technical field [0001] The invention belongs to the field of railway tunnel engineering, and in particular relates to a regional overall treatment method for water seepage and cracks in open-cut tunnels of high-speed railways. 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. Due to its own particularity, the tunnel structure will be affected by factors such as poor design, improper structure handling, poor material selection, poor construction quality, and unfavorable geological, topographical, and climatic conditions during the design, construction, and service processes. As a result, various diseases appear in the long-term use process. Among them, the complex s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/38E21D11/00
CPCE21D11/003E21D11/38
Inventor 王秀妍张继清郭剑勇宋冉张桂扬崔涛王达麟刘惠敏张建芳高国忠宋乐阳李红霞王洪昌
Owner CHINA RAILWAY DESIGN GRP CO LTD
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