锦屏一级拱坝为世界最高拱坝,也是世界已经建成的最高大坝,地形地质条件极其复杂。通过锦屏一级拱坝岩体抗剪强度试验、试验特征点选取、参数统计方法以及典型滑块稳定计算等多方面的分析,对岩体抗剪强度参数的取值方法进行深入研究。研究结果表明对坝基岩体抗剪强度参数标准值的取值,国内外不同规范的规定有一定差异;岩体抗剪强度试验曲线上的某些特征点可采用易于确定的特征点经换算后得出;对同一工程,采用不同的抗剪强度参数统计方法,得到的抗剪强度参数会有一定差异,可能造成对坝肩抗滑稳定不一样的评价。研究成果可供类似工程借鉴参考。
Abstract
Jinping arch dam is the highest arch dam in the world, and is also the highest dam has been built in the world. It has complex topographic and geological conditions. Methods of determining the shear strength parameters of rockmass are researched by shear tests, test feature point selection, parameter statistics, as well as typical block stability analysis. Research results indicate that the selection of standard value of shear strength parameters varies in different specification requirements in China and abroad. Some feature points on the shear test curve can be determined through the feature points obtained easily. The shear strength parameters of the same project obtained by different methods are different, which may lead to different evaluation results of anti-sliding stability of dam abutment. The research results provide reference for similar engineering.
关键词
锦屏一级拱坝 /
抗剪强度参数 /
参数取值方法 /
坝肩稳定
Key words
Jinping-I arch dam /
shear strength parameter /
method of determining parameter /
abutment stability
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参考文献
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