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一、引言天生桥二级水电站装机容量132万千瓦,是广西、贵州两省交界红水河上游建设中的大型水电站之一。电站处在深山狭谷,具有引水洞长、洞径大、落差高、埋藏深等特点。电站区域地质构造复杂,尤其是厂房附近的高边坡,坡度陡,对厂房安全影响大。为了解高边坡岩体的应力状态,我们用套芯法在其岩体中进行了3个点的应力测量,结果表明主应力方向为N59°W,与滑坡体方向一致,最大主应力达20MPa,应力值分布具有分带性。二、厂房边坡地质构造概况 1.地形地貌
I. INTRODUCTION Tianshengqiao II Hydropower Station has an installed capacity of 1.32 million kilowatts and is one of the large hydropower stations in the upper reaches of the Hongshui River at the junction of Guangxi and Guizhou provinces. Power station in the deep valleys, with diversion hole length, large diameter, high drop, buried deep and so on. The geologic structure of the power station area is complex, especially the high slope nearby the plant, which has steep slope and great impact on the plant safety. In order to understand the stress state of high slope rock mass, we use the core method to carry out 3-point stress measurement in the rock mass. The results show that the principal stress direction is N59 ° W, consistent with the direction of the landslide body. The maximum principal stress 20MPa, stress distribution with zonation. Second, plant slope geological structure 1. Topography