干旱区花岗岩体中地下坑道渗水的逻辑信息法评价

摘要

Seepage into a tunnel system with granitic surrounding rock in an arid area is studied in this paper using logic-information method. Influential factors of seepage into the tunnels are analyzed and eleven factors are selected.Seriousness of seepage is divided into four grades based on the characteristics of seepage into the tunnels. The logicinformation method is established to predict and evaluate seepage into the tunnels on the site. Weights of influential factors are calculated. According to the weights of influential factors, it can be concluded that lithology,landform and fracture characteristics of the surrounding granitic rock influenced the seepage into the tunnels clearly. And the site is divided into several different zones and the probability of seepage in each zone is evaluated.%本文采用逻辑信息法对某干旱区花岗岩体中的地下坑道渗水进行了研究.对影响地下坑道渗水的因素进行了分析,确定了可能与地下坑道渗水相关的11个影响因子,并根据场地地下坑道渗水特征,将渗水严重程度分成4个级别,建立了所研究场地地下坑道渗水预测评价的逻辑信息法模型,得到了不同影响因子的权重.从计算得到的影响因子的权重可以看出,围岩岩性、裂隙发育特征及地下坑道垂直正上方地表附近的地貌等因素对地下坑道渗水都有明显影响.并用所建立的模型对研究场地进行了分区评价.