乌弄龙水电站地下厂房岩锚梁开挖试验

Rock Anchor Beam Excavation Test in Underground Powerhouse of Wunonglong Hydropower Station

针对特定地质条件下岩锚梁开挖施工,在乌弄龙水电站地下厂房岩锚梁开挖施工前,开展多次爆破试验和工艺试验,不断优化钻爆参数和施工工艺,为岩锚梁开挖施工质量达到优良标准提供技术支撑,在多次爆破试验的基础上,通过采取不良地段固壁灌浆,下拐点用角钢保护,下拐点下部采用树脂锚杆锚固等措施以取得预期效果。

Aiming at the construction of rock anchor beam, several blasting tests and process tests were carried out before the rock anchor beam excavation in the underground powerhouse of Wunonglong Hydropower Station. The blasting parameters and construction technology were optimized to make the construction quality of the rock anchor beam excavation reach the technological support of excellent standards. On the basis of plenty of blasting tests, such measures as grouting for braced wall, angle steel protection on lower inflection point and resin bolting on upper inflection point were taken to obtain satisfactory performance.