隧道断层破碎带超前帷幕注浆加固技术研究

Study on the technology of advance curtain grouting reinforcement in the fault fracture zone of tunnel

山岭隧道穿越岩性复杂、节理发育的断层破碎带,为维护断层破碎带地段围岩的稳定性,降低隧道施工引起的坍塌失稳风险,常采用超前帷幕注浆对隧道断层破碎带进行加固。根据超前地质钻探探明了断层破碎带的规模,进行了注浆设计,采用数值模拟和现场实测验证了注浆加固效果。工程实践证明,超前帷幕注浆是一种维护围岩稳定、保证隧道施工安全的工程措施。

In order to maintain the stability of surrounding rock and reduce the risk of collapse and instability caused by tunnel construction,the advanced curtain grouting is often used to reinforce the tunnel fault fracture zone. According to the scale of the fault fracture zone,the grouting design is carried out,and the grouting reinforcement effect is verified by numerical simulation and field measurement. The engineering practice proves that advance curtain grouting is a kind of engineering measure to maintain the stability of surrounding rock and ensure the safety of tunnel construction.