金沙水电站山梁子变形体边坡开挖支护措施分析

Analysis on slope excavation and support measures of Shanliangzi deformation body at Jinsha Hydropower Station

金沙水电站大坝右岸征地红线外的山梁子变形体处于导流明渠上方,为避免变形体滑塌威胁电站施工及运行安全,有必要开展该变形体抢险工程的边坡开挖卸荷排险分析,制定安全经济的开挖方案。通过比选不同开挖支护方案和分析不同运行工况下的边坡稳定性,确定了有效施工措施,及时排除险情,消除了电站安全隐患。研究成果可供类似工程参考。

The Shanliangzi deformation body is beyond the land acquisition red line on the right bank of Jinsha Hy⁃dropower Station and the open diversion channel of the station.In order to avoid the deformation collapsing and threatening the safety of construction and operation of the power station,it is necessary to carry out risk removal analysis for the excavation and unloading of this deformation body emergency construction and formulate a safe and economic excavation scheme.Through the comparison of excavation and support solutions,and with analysis of the slope stability in different operation conditions,the effective construction measures are proposed,the dangerous sit⁃uation and the potential safety hazards of the power station are eliminated.This research result can be used as a ref⁃erence for similar projects.