特长岩溶隧道涌水预测的系统辨识方法

Identification of karst water system in long tunnel

本文首先对隧道标高附近及其以上庞大空间范围内的岩溶水进行系统识别与划分 ,同时完成对每个系统结构与功能的不同精度的描述。根据各个系统与隧道的空间关系及其它相关信息 ,确定系统向隧道供水的可能性 ,并进行分级 ;根据可能成为隧道充水水源的系统的径流量及导水通道的水力学特征 ,对隧道涌水量作出预测。本文通过地球化学、深部物探及常规勘探等手段 ,利用上述方法对正在建设的渝怀铁路圆梁山特长隧道的涌水量及隧道疏干影响范围进行了评估。

The procedure of the method is as follows: at first the Karst water near and above the tunnel level is identified and divided in view of Karst water system. At the same time, the structure and function of the every system is described. According to the space relation between each system and the tunnel and other relative information, the potential of every system supplying the tunnel with water is determined. Finally from the runoff of the systems and hydraulic properties of conductivity passages, the water inflow volume may be estimated. The paper synthesizes the information on geology-hydrogeology, geochemistry, geophysics, traditional prospecting and so on about Yuanliangshan long tunnel in Yuhuai Railway and makes estimations of the tunnel discharge rate and affecting scope of water inflow.