摘要
结合瀑布沟工程，进行了坝基砂结构性的试验研究，研究了试样密度、固结时间、超固结效应和预振等结构性因素，对剪切波速值的影响及剪切波速与砂土动强度和动变形特性的关系．试验研究表明，剪切波速对以上结构性因素均有敏感反应并有良好的相关关系，动强度、动变形特性与剪切波速也有非常密切的相关关系．以原位剪切波速值作为制样控制标准，进行了坝基砂的动力特性研究和坝基上、下游砂层的液化可能性分析．并与传统的以密度控制制样的试验结果进行了比较，分析了考虑砂层结构性对工程实际的宏观影响．
The experiments demonstrate that the shear wave velocity is influenced by the structure of sand, such as the sample density, consolidation time, over consolidation ratio and previbration. The shear wave velocity have close relation to the dynamic shear strength and dynamic deformation characters. The cyclic triaxial test and resonant column test with in situ shear wave velocity control the sample was conducted for the sand of Pubugou dam foundation. The liquefaction Possible of the sand layer was assessed using the test results and compared to the result with density control the sample.
出处
《水利水电技术》
CSCD
北大核心
1996年第3期9-14,共6页
Water Resources and Hydropower Engineering
关键词
坝基
砂土
原位剪切波速
液化
可靠性
sand structure, in situ shear wave, velocity liquefaction possible, Pubugou Project
