某引水工程施工支洞软岩变形控制工程实例

某引水工程施工支洞软岩洞段开挖施工中,出现不同程度中等及轻微变形,根据围岩变形监测数据,动态调整初期支护方案、适时进行二衬施工,最终将变形量控制在1cm^2cm,控制效果良好,对后续主洞施工及其他工程具有借鉴意义。

During the excavation of the soft rock section of the branch tunnel of a water diversion project,different degrees of moderate and slight deformation occurred.According to the surrounding rock deformation monitoring data,the initial support scheme was dynamically adjusted and the second lining construction was carried out timely.Finally,the deformation is controlled at 1~2 cm,and the control effect is good,which can be used as a reference for the follow-up main tunnel construction and other projects.