Tunneling through water-rich fault fracture zones is prone to engineering incidents such as water and mud inflow,excessive deformation of the initial support,and cracking,making tunnel construction difficult and high-risk,which seriously affects construction progress.Using the Gaoligong Mountain Tunnel as a case study,this paper investigates the deformation and damage characteristics of the tunnel vault through on-site monitoring,primarily manifested as vault settlement and asymmetric deformation.The fractured sur-rounding rock,low strength,and abundant groundwater are the main causes of extensive damage,water surges,and collapses during tunnel construction through fault fracture zones.A series of comprehensive treatment measures were implemented,including treatment of collapse bodies,grouting reinforcement,and adjustments to construction methods.These measures effectively controlled surrounding rock deformation,demonstrating the effectiveness of the treatment strategies.
关键词
隧道工程/富水断层/围岩变形/拱顶沉降/注浆加固/支护参数
Key words
tunnel engineering/water-rich fault/surrounding rock deformation/vault settlement/grouting reinforcement/sup-port parameters
维普
万方数据