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地下洞室开挖施工的重点就是控制周围岩体的稳定性,严防变形或塌落等破坏的可能性。某水电站地下洞室开挖工程具有大跨度、高边墙的情况,存在开挖稳定性问题,最主要还有相邻洞室之间岩层、岩柱引起的稳定性问题,文章提出可通过洞室开挖施工技术、支护处理等措施来保证围岩稳定性。从工程实施效果可以看出,洞室开挖技术是可行安全的,并为同类工程提供参考。
The key point of excavation in underground caverns is to control the stability of surrounding rock mass and prevent the possibility of deformation or collapse. The underground cavern excavation project of a hydropower station has the conditions of long-span and high-side wall, and has the problems of stability of excavation. The most important problem is the stability caused by rock strata and rock columns between adjacent caverns. Room excavation construction technology, support treatment and other measures to ensure the stability of surrounding rock. As can be seen from the project implementation effect, tunnel excavation technology is feasible and safe, and provide reference for similar projects.