小浪底水电站主变室岩壁牛腿设计  

Design of Suspended Concrete ledge of Main Transformer Chamber in Xiaolangdi Hydropower Stations

作　　者：柴志阳[1] 严永璞[1] 史仁杰[1] 

机构地区：[1]黄委会勘测规划设计研究院,郑州450003

出　　处：《人民黄河》1998年第6期31-33,共3页Yellow River

摘　　要：岩壁牛腿是近年来在地下洞室设计中逐渐发展起来的一种特殊结构型式 。它主要是利用锚杆将现浇混凝土牛腿固定在岩壁上，其上部荷载则通过长锚杆传到边墙岩体中，以充分利用围岩的承载能力。根据小浪底水电站主变室的平面布置、电气布置及地质条件，混凝土梁由岩壁牛腿来支撑，采用力矢多边形和力矩平衡公式对固定牛腿的锚杆进行了设计，保证了岩壁牛腿的稳定，且施工方便、节省投资。Suspended concrete ledge is a special structure recently developed in underground cavern design. It is mainly utilizing anchors to fix the cast-in-situ concrete in rock, the upper load is transferred into rock on the wall through long anchors so that surrounding rock bearing capacity can be fully utilized. In accordance with the plan layout, electrical arrangement and geological conditions at the main transformer chamber in the Xiaolangdi Hydropower Station, concrete beam is supported by suspended concrete ledge. The anchors used in fixing the ledge is designed by moment polygon and moment equilibrium formula. This design ensures the stability of the suspended concrete ledge, eases construction and reduces cost.

关 键 词：岩壁牛腿 设计 水电站 锚杆 主变室 混凝土 

分 类 号：TV554.12[水利工程—水利水电工程] TU471.11[建筑科学—结构工程]