小浪底水利枢纽水电站地下厂房岩壁吊车梁的施工

Construction of Rocky Crane Beam in Underground Workshop of Xiaolangdi Hydropower Station

小浪底地下厂房吊车梁，采用岩壁吊车梁型式．预应力锚杆采用双层保护后张法．在岩壁吊车梁施工中，质量高、进度快，集预裂爆破、光面爆破、深孔梯段爆破、预应力锚杆的制作与安装等新工艺技术为一体，取得了较好的技术经济效果．

In Xiaolangdi Hydropower Station,the underground workshop crane beam adopts rocky crane beam model,the prestressed anchor bar adopts the doublelayer protective posttensioning method.In the construction of rocky crane beam,the new technology of presplit,reface,deepgradient bursts and manufacture and mounting of prestressed anchor bar with high quality and rapid progress are applied.