张家湾隧道涌水灾害预测

Prediction of Water Inrush Disaster in Zhangjiawan Tunnel

涌突水灾害预测对深埋隧道的建设非常重要。拟建张家湾隧道地质背景复杂,准确预测隧道涌水灾害有利于指导隧道的施工建设。在分析隧址区岩溶水文地质条件的基础上,通过地下水动力学、数值模拟等方法计算张家湾隧道涌水量,并运用解析法预测隧道涌水的影响范围,分析其对地下水环境的影响。结果表明,隧道涌水量为66390 m^(3)/d;涌水现象主要集中在岩溶深埋段和断层破碎带;在影响半径以内,泉点流量大幅减少,地下水环境质量降低。

Predicting the water inrush disasters is of great importance in the construction of deeply buried tunnels.The geological background of the proposed Zhangjiawan tunnel is complicated,and accurate prediction of the water nrush disasters in the tunnel is helpful to guide the construction.In this paper,based on the analysis of the karst hydrogeological conditions in the tunnel site area,the water inflow of Zhangjiawan tunnel was calculated through groundwater dynamics and numerical simulation,and the analytical method was used to predict influence range and analyze the influence on groundwater environment.The results showed that the water inflow was 66390 m^(3)/d,and the water inrush phenomenon was mainly concentrated in the deeply buried karst section and fault fracture zone.Within the influence radius,the flow of spring point was greatly reduced and the quality of the groundwater environment was reduced.