Water seepage and crack regional overall treatment method for open excavation tunnel of high speed railway

Abstract

The invention discloses a water seepage and crack regional overall treatment method for an open excavation tunnel of a high speed railway. The method comprises the following steps: surveying a water leakage situation, determining a drilling position and drilling; cleaning the drilled hole; embedding a grouting nozzle; grouting to form a new waterproof membrane; performing water leakage inspectionafter grouting is performed; and cutting and removing the exposed grouting nozzle and performing sealing treatment. The invention provides the water seepage and crack regional overall treatment methodfor the open excavation tunnel of the high speed railway which forms integrated structural strength by lining aiming at the characteristics of the open excavation tunnel of the high speed railway, particularly at the complex tunnel situations of large number of water leakage cracks, wide distribution range and the leakage of unplugged cracks in the periphery caused by plugging one crack; integrated grouting in rings in the overall cross section is adopted, and grouting holes are uniformly distributed in each ring, so that uniform grouting at the positions, such as an arch top, a hance and a side wall, can be realized; and regional overall treatment is performed to form a new waterproof system, so that guarantee is provided for safety 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 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...

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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

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