穿越富水双断层隧道涌水量估计方法

Estimation method of water inflow in water-rich double-fault tunnel

为预测隧道在复杂富水环境下施工期间的涌水量,通过分析隧道周边地下水以及地表径流,根据隧道穿越双断层的特点,设计一套基于镜像法的隧道穿越双断层时涌水量的预测方法,分析不同衬砌断面处经过断层、节理裂隙带和岩脉侵入带等不良地质情况共同作用下隧道的涌水量。以鲍村隧道为依托,验证涌水量计算公式的可行性。根据预测结果,提出具有针对性的防排水措施和动态监测方法,为项目的正常施工与运营提供理论与实践的支持。

In order to predict the water inflow of the tunnel during construction in a complex water-rich environment, by analyzing the groundwater and surface runoff around the tunnel and according to the characteristics of the tunnel crossing the double faults, a set of prediction methods for the water inflow of the tunnel considering the double faults are designed based on the circular island model and mapping principle. The water inflow of the tunnel under the joint action of fault, joint and fissure zone and dike intrusion zone at different lining sections is analyzed. Based on BaoCun tunnel, the feasibility of water inflow calculation formula is verified. According to the prediction results, the paper puts forward the measures of drainage and dynamic monitoring, which can provide theoretical and practical support for the normal construction and operation of the project.