基于优势面理论的隧道控水与模拟分析

利用优势面理论对断层导水进行分析，并结合降雨渗流的条件进行了数值模拟。探讨了特定条件下围岩中渗流场的分布规律，模拟了改变围岩注浆圈的厚度和渗透系数的大小对涌水量的影响。结果表明，改变注浆圈的厚度对涌水量影响小，注浆圈渗透系数影响很大，而且在断层处产生汇水作用，控制注浆圈渗透系数在10-8 m/s以下可以有效地防水。该控水理论可以为隧道水害的预测与治理提供新思路。

Simulation and analysis of controlling water in tunnel based on preferred plane theory

Preferred plane theory is used to analyze fault to lead water; and numerical simulation of seepage for rainfall infiltration is employed to explore distribution of seepage field of surrounding rock under extra condition. It is simulated that water volume is changed with the value of the coverage and permeability index of grouted surrounding rock to control leakage volume. The results show that grouted coverage not almost influenced on result while permeability index largely influenced on it; and it is found that fault has an accumulating water role. As if permeability index of grouting surrounding rock is controlled lower than 10-8 m/s, the effect of waterproofing can meet the need of construction and use of the tunnel. The conclusion can present a new idea to predict and cure flood of tunnel.