四川某隧道岩溶水文地质条件及涌水量初步研究

拟建隧道位于黄龙景区,通过段主要为强溶蚀岩溶-裂隙含水岩层,区内构造活跃、地形切割强烈,隧道遭遇岩溶涌突水的危险性较大.通过分析该隧道岩溶水文地质环境.论述了隧址区岩溶发育分布规律、岩溶水补径排条件及化学特征,并采用地下水径流模数法和大气降水入渗法2种方法对比计算对隧道涌水量做出初步预测评价,为施工提供依据.

A Primary Study of Karst Hydrogeology and Water Gushing of Tunnel in Sichuan Province

The tunnel which is arranged to excavate situates Huanglong beauty spot,the stratum that the tunnel would pass though is strongly dissolved cranny aquiferous terrance.The tectonic of this area is active and the topography is incised strongly,so the tunnel water gushing problem is easily exited.Based on the brief geologic condition of this area,this paper particularly analyzes the rules on the development of the karst and the condition of karst water’s recharging runoff and outflow and its chemical features.The paper also makes a prediction and evaluation of the tunnel water gushing capacity in the methods of the groundwater runoff and atmosphere precipitation in leakage,which will offer a basis suggestion for the safe construction.