初期支护封闭对隧道围岩变形影响的测试分析

The Test Analysis of the Influence of Initial Support Closure on Tunnel Surrounding Rock Deformation

针对炎陵I号隧道软弱段开挖情况,通过整理隧道开挖过程中不同情况下围岩变形的实测变形数据,分析封闭支护对围岩变形的影响效果。在软弱隧道开挖过程中,若不及时进行支护封闭,围岩变形难以控制;通过在上台阶及时封闭初期支护或实现快速开挖下台阶封闭初期支护,能够有效地起到控制围岩变形的效果。

For the excavation of soft segment in Yanling No. 1 Tunnel, in the tunnel excavation process, by arranging the measured deformation data of surrounding rock deformation under the different conditions, this paper analyzed the influencing effect of closure support on the surrounding rock deformation.