龙溪隧道初期支护变形原因分析及处治

Analysis and Treatment of Preliminary Bracing Deformation in Longxi Tunnel

龙溪隧道属深埋长大隧道,地质条件复杂,受构造作用影响强烈.初期支护后部分地段发生支护变形、开裂.从地质条件、设计及施工管理角度出发分析了该隧道初期支护破坏的原因,采取围岩注浆、调整开挖方式和支护参数等针对性处治措施对变形破坏地段进行了有效整治.

Longxi tunnel is the deep-lying long and large one with complicated geological conditions and violently affected by tectonic functions. Aften preliminary bracing, support deforma- tion and cracking occurred in partial sections. The author analysed the damage causes in light of geological conditions, design and construction management, and effectively renovated the deformation damaged sections by means of aimed treating measures such as wall rock grouting and adjustment of excavation methods and supporting parameters.