摘要
Abstract
Taking the Baima Tunnel of Jiumian Expressway as an example,a brief analysis of the stress state of the tunnel surrounding rock was conducted.Combined with advanced geological prediction,a construction system of"small conduit advance support+advance anchor rod sup-port+advance curtain grouting protection+step excavation"was proposed.The results show that by adopting a reasonable support method,the subsidence of the fault fracture zone arch and the convergence of the surrounding area are within a controllable range,meeting the engineering requirements.关键词
公路隧道/断层破碎带/围岩应力/锚杆支护Key words
Highway tunnels/Fault fracture zone/Surrounding rock stress/Bolt support分类
建筑与水利
