拉西瓦水电站岩锚梁岩台开挖施工技术

Excavation of Rock Bench for Rock-anchorage Beam of Laxiwa Hydropower Station

拉西瓦水电站岩锚梁位于厂房中上部位,其施工进度直接影响厂房下部开挖及支护施工,另外岩台面是岩锚梁的支撑基础,对岩台成形及开挖爆破振动等精度要求高,在施工前必须制定切实可行的工艺和指导方案。为此研究了厂房岩锚吊车梁开挖施工的关键技术。也介绍了拉西瓦水电站地下厂房岩锚梁开挖施工的成功做法及经验。

The rock-anchorage beam of the Laxiwa Hydropower Station is located in the upper position of powerhouse so that its construction progress will directly affect the excavation of lower part of powerhouse and the support construction. Because the surface of rock bench is the base of rock-anchorage beam, high accuracy is required in the formation of rock bench and excavation blasting, so practical techniques and guidance scheme must be formulated before construction. For this reason, this paper discusses the key technologies of excavation and construction of rock-anchorage beam of crane of underground powerhouse and describes the successful experience of excavation and construction of rock-anchorage beam of the crane of underground powerhouse of Laxiwa Hydropower Station.