泽溪坂1#隧道洞口边坡溜塌及初期支护裂缝综合处治对策

摘要

After the Zexiban 1# tunnel entrance the portal, the primary support grows fractures. It analyzes the forming mechanism of landslides and major reasons of cracks and the stability of the typical cross-section. Therefore, first of all, it takes emergency measures for the accident, and then the anti-slide pile group locking foot , surface grouting strengthening surface stability overhead slope and intercepting ditch drainage and drainage hole punched grouting strengthening are adopted . Through the above treatments, the deformation and failure of the landslide have been effectively curbed. Additionally, the tunnel cracks don’t develop. As with continuous measurement monitoring shows that the landslide has in a stable state, it commendably explains the managements are correct and provides reference for similar engineering practice.%　　在泽溪坂1#隧道进口上导洞出洞后，初期支护发现了裂缝。基此首先分析了该山体滑坡形成的机制以及洞内初期支大裂缝产生的；其次根据现场地质实际对溜塌段的特殊断面进行稳定性计算分析，并先采取紧急应对措施；然后采用了抗滑桩群锁脚、地表注浆加强地表稳定性、仰坡截水沟引流排水和洞内打孔注浆加固等综合治理措施。通过综合治理，滑坡变形破坏得到了有效遏制，隧道洞内裂缝未出现发展。经过连续量测监控表明，该滑坡已处稳定状态，说明病害治理思路正确，可为类似工程实践提供借鉴。