期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2020
卷号：510
期号：5
页码：1-7
DOI：10.1088/1755-1315/510/5/052059
语种：English
出版社：IOP Publishing
摘要：In mountainous areas with abundant groundwater and high water pressure, the design of waterproof and drainage is the most important part of the whole tunnel construction process. Improper treatment of groundwater will not only damage the local ecological environment, but also bring hidden danger to the safety of tunnel structure, especially in the ecologically fragile area. The tunnel project under construction in the East Tianshan Mountain is located in the high-altitude mountain area. The surface is the national forest protection area, and the vegetation is perennial. Once a large amount of groundwater is lost, the surface ecology will be damaged and hard to recover in a short time. In this paper, the existing design of mountain tunnel waterproof and drainage is summarized, and its advantages and disadvantages are analyzed. Based on the previous research, the concept of waterproof and drainage design suitable for the East Tianshan tunnel is proposed: "one block, two rows and Three Preventions". "One block" is a circle of grouting outside the tunnel to block most of the groundwater. "Two rows" is to set two layers of drainage pipe network between shotcrete and waterproof layer and between waterproof layer and lining. "Three proofing" is to use three layers of water proofing: shotcrete layer, special waterproof layer and lining concrete. Layers of fortification can minimize the interference to groundwater and ensure the safety of tunnel structure.
