涌水隧洞段工程与水文地质问题分析

隧洞施工过程中,涌水量大一直是干扰施工顺利进行的主要因素。结合前期勘察资料、施工地质编录资料以及施工现场调查情况,分析了开挖洞段涌水和被淹的主要原因,并提出在地下水比较丰富的洞段,应遵循开挖后紧跟衬砌的原则,必要时对隧洞围岩进行灌浆,在大量涌水的断裂构造带应进行超前探测,必要时进行超前灌浆封堵等建议。

The Engineering of the Water-pouring Tunnel Section and the Analysis on the Geo-hydrologic Problems

In the construction of the tunnel, the water-pouring amount is always the important problem of disturbing the smooth progress of the construction. Connecting with the early-stage reconnaissance data, construction-used geological data and construction field surveying data, this paper analyzes on the main causes of the water-pouring and submerging of the excavated tunnel section, and puts forward some suggestions of adhering to the principle of making the liner following closely the excavation in the tunnel sections being rich in the groundwater, and making the grouting for the adjacent rock in the necessary time, and conducting the advanced detection in the fracture zone with large quantity of water-pouring, and making advanced plugging with grouting, etc.