裂隙岩体隧道排水影响范围数值试验研究

隧道排水影响范围一直是难以突破的水文地质问题,直接关系到隧道施工及运营对地下水环境的影响程度.以石太客运专线石板山隧道为例,采用非均质、各向异性等效连续介质渗流模型进行瞬态分析,研究了隧道排水影响半径与施工过程、水文地质因素、工程因素及降雨入渗补给因素的关系.研究结果表明,地层渗透系数、降雨入渗补给量及洞顶含水层厚度影...

Numerical Experimentation Research of Drainage Influence Range in Fractured Rock Tunnel

Tunnel drainage influence range is a difficult hydrological problem.It relates directly to tunnel groundwater environment influence degree in construction and operation stages.Based on Shibanshan tunnel in Shijiazhunag-Taiyun passenger line,this paper analyses flow transient process adopting heterogeneity and anisotropy equivalent flow models.This paper studies the tunnel drainage influence radius and construction progress,hydrology factors,engineering factors and rainfall infiltration factors relations.Research results show that the influence factors are rock permeability,rainfall infiltration recharge and aquifer thickness on tunnel top,less influence factors are structure surface direction,anisotropic biquadratic coefficient and primary support of the closed time.The conclusions will provide technical supports for evaluating the tunnel construction of groundwater envimental impact.