地下厂房岩壁吊车梁设计  

Design of Rock-bolted Crane Girders in Underground Powerhouse

作　　者：姚德生[1] 周宏民 张忠辉[1] Yao Desheng;Zhou Hongmin;Zhang Zhonghui(China Water Resources Beifang Investigation,Design and Research Co.Ltd.,Tianjin,300222)

机构地区：[1]中水北方勘测设计研究有限责任公司,天津300222

出　　处：《水利水电工程设计》2022年第2期26-28,56,共4页Design of Water Resources & Hydroelectric Engineering

摘　　要：巴基斯坦苏基克纳里(SK)水电站地下厂房位于高地震区,吊车梁采用岩壁吊车梁结构,设计中需考虑地震荷载。岩壁吊车梁设计采用刚体极限平衡法进行设计,结合地下厂房开挖支护措施,岩壁吊车梁第二排受拉锚杆采用预应力锚索,经现场监测,预应力锚索可有效地减小上部锚杆的拉应力,提高岩壁吊车梁的安全度。针对该电站岩壁吊车梁部分地段地质条件较差的问题,设计中采用了混凝土置换等措施进行加强锚固。通过现场运行表明,岩壁吊车梁体型及锚固措施设计是合理的。The underground powerhouse of Suki Kinari Hydropower Project in Pakistan is located in strong earthquake area. Rock-bolted cranegirders are adopted,and seismic load is considered in design. The rock-bolted crane girders are designed with rigid limit equilibriummethod. In combination with the excavation and support measures of underground powerhouse,the second row of tensile bolts of rockbolted crane girders adopts pre-stressed anchor cable. It is found through on-site monitoring that the pre-stressed anchor cable caneffectively reduce the tensile stress of the upper bolt and provide safety of the rock-bolted crane girders. Considering the poor geologicalconditions in some sections of the rock-bolted crane girders,concrete displacement and other measures are adopted to strengthenanchorage. The site operation shows that the design of crane girder and the anchorage measures are reasonable.

关 键 词：岩壁吊车梁 刚体极限平衡法 预应力锚索 地震 

分 类 号：TV546[水利工程—水利水电工程]