圆梁山隧道毛坝向斜段岩溶水均衡研究

A RESEARCH INTO THE KARST WATER BALANCE OF YUANGLIANGSHAN TUNNEL IN THE MAOBA SYNCLINE

为了对圆梁山隧道毛坝向斜段岩溶水径流强度、水量收支状况有一个概括的了解 ,以及深入认识隧道通过层位地下水的贮量 ,需要对岩溶水的补径排条件及收支状况进行均衡分析。根据毛坝向斜的地质环境条件 ,采用降水资料类比生成岩溶水排泄量的流量过程曲线的手段 ,较好地实现了缺少足够的水量动态资料情况下的均衡分析。

The Yuanliangshan tunnel is a key project in the Chongqing Huaihua railway. The Maoba syncline, one section of the Yuanliangshan tunnel, mainly consists of limestone in Permian and Lower Trias layers. The inburst of karst water is a main geologic hazard problem in the construction of tunnels. To find out the runoff intensity of the karst water and its balance between rainfall recharge and karst water outflow in the Maoba syncline , and groundwater reserves of aquifers which the tunnel goes through, this paper analyses the karst water balance in this region. Based on the geologic conditions of the Maoba syncline, the flux process curve of the karst water outflow is gained by analogy from the rainfall data. Though there is lack of enough sequent observed data of the water quantity, it satisfies that the Maoba syncline karst water balance analyses. The result reveals that there is the positive balance in the water cycle of the Maoba syncline.