大广坝浅埋式地下主厂房的开挖与监测

Excavation and monitoring of the Daguang dam's shallowly embedded underground main power house

大广坝水电站地下厂房埋深与开挖跨度比不足 1∶1,是我国目前埋深较浅的地下厂房之一。介绍浅埋式地下主厂房的开挖分层、开挖程序、控制爆破技术、喷锚支护及围岩变形观测等情况 ,总结施工经验 ,为类似工程设计和施工提供借鉴。

The embedded depth of the Daguang dam underground main power house is shallower in China. Its embedded depth excavation span ratio is less than 1:1. Its excavation by layers, excavation procedure, controlling explosion technique, sprinkle support and adjoining rock deformation monitoring were introduced here. The construction experiences were concluded for reference to the similar project.