关角特长铁路隧道防排水措施概述

文章分析了关角隧道地下水的赋存条件与分布规律,以及地下水补、径、排特征;详细计算了隧道涌水量,根据洞内、洞外、斜井的不同情况,采取了不同的防排水措施;并对搞好特长隧道施工过程中的防排水提出了建议。

Waterproofing and Drainage Measures Adopted in Guanjiao Super-long Railway Tunnel

Located on Xining-Geermu sector of Qinghai-Tibet railway line,Guanjiao super-long railway tunnel is the longest railway tunnel so far in China,which is about 32.6 km long.Analyzing the natural condition and distri-bution regulation as well as the supplement,running-off and drainage of ground water in Guanjiao tunnel,the au-thor calculated the water ingress of the tunnel and adopted different waterproofing and drainage measures accord-ing to different conditions inside and outside the tunnel and that of the inclined shaft.At the same time,put forward proposals for water-proofing and drainage during construction.