小安隧道岩溶发育特征及地下水动力分析

Analysis of Karst Development and Groundwater Dynamics Characteristics at Xiaoan Tunnel

川北地区碳酸盐岩广泛分布,由于地壳的阶段性隆升、断裂作用和强烈的流水侵蚀、溶蚀,使岩溶的发育表现出多期叠置性及空间分布的不均匀性。以西成客专小安隧道工程为例,在岩溶水文地质调查的基础上,结合勘察设计与现场施工情况,论述了隧道区岩溶地貌类型、发育规律及地下水动力特征。

There spreads carbonate rocks in northern Sichuan widely. Under the action both of the phased uplift and fracture of crust and of the strong erosion and dissolution of water, the karst development presents multiple-epoch superimposition and nonuniform spacial distribution. Taking Xiaoan Tunnel on Xi＇an--Chengdu PDL as an example, the paper on the basis of karst hydrogeologic survey and the combination of prospective design and site construction, discussed the karst landform types in the tunnel zone, the karst development characteristics and the dynamic characteristics of groundwater.