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堆石料抗剪强度参数是堆石坝抗滑稳定计算最主要的参数。每个堆石坝工程均进行堆石料抗剪强度试验,进一步掌握堆石料抗剪强度参数量值大小、规律性及主要影响因素,根据北京勘测设计研究院勘测设计的7个工程101组试验资料,在对堆石料进行风化程度分类的基础上,采用数理统计分析方法,统计分析石渣料、碎砾石土、砂卵石土作为主堆石料、次堆石料、垫层料、过渡料的抗剪强度参数及规律性。进一步分析浸水饱和、密实度、颗粒级配(<5 mm含量)、磨圆度、风化程度、岩性对堆石料抗剪强度参数的影响。结果表明,堆石料风化程度对抗剪强度参数影响最为明显,其他因素则均有不同程度影响。
Rockfill shear strength parameters of rockfill dam stability calculation of the most important parameters. The rockfill shear strength test of each rockfill dam project is carried out to further understand the magnitude, regularity and main influencing factors of the shear strength parameters of rockfill materials. According to the test data of 101 sets of 7 projects surveyed and designed by Beijing Survey, Design and Research Institute Based on the classification of the degree of weathering of the rockfill materials, statistical analysis of the gravel material, crushed gravel soil and sand-pebble soil as the main rockfill material, secondary rockfill material, bedding material, transition material shear strength Strength parameters and regularity. The influence of saturated water saturation, compactness, particle size distribution (<5 mm content), roundness, weathering degree and lithology on the shear strength parameters of rockfill materials was further analyzed. The results show that the weathering degree of rockfill material has the most obvious influence on the shear strength parameters, while other factors have different degrees of influence.