关键词: 长大隧道, 隧道涌水, 水岩作用, 机理研究

Abstract: Water inflow in long and large tunnel has intimate relationship with the feature of groundwater and rock mass. Different wall-rock owns different geological structure, which shows different mechanism of destruction under the action of underground water. Taking the water inflows accidents in Dahualing long and large tunnel as a case, and based on the fieldwork and geological data, the relative theory of geochemistry and fracture mechanics are used to analyze the scale, location, inducing factors and geological conditions of water inflows of long and large tunnel in detail. According to the rock composition and geological conditions of water inflowing Tunnel, the water-rock interaction mechanism and its relationship with water gushing in this region are studied. The results show that matured water-rock interaction condition is a significant factor for inducing water inflow disasters in Dahualing long and large tunnel.

Key words: Long and large tunnel, Water inflow in tunnel, Water-rock interaction, Mechanism research