土石坝坝体土抗剪强度现场测试结果的分析研究

基于松塔水电站土石坝现场取样的固结不排水三轴剪切试验,分析了反映土体抗剪强度两个关键指标的测试结果,即四个参数:粘聚力C、内摩擦角φ、有效粘聚力C’、有效内摩擦角φ’,然后与土石坝主体工程初步设计中坝坡稳定分析选择的坝体土抗剪强度指标值进行了比较,并基于测试统计值的稳定分析计算结果,认为坝体填筑土的抗剪强度指标能够满足设计要求。

Analysis and Study on In-place Test Results of Soil Shear Strength of Earth-rock Dam's Body

On the basis of consolidated undrained triaxial shear test of soil samples taken from construction site of earth-rock dam of the Songta Hydroelectie Station, the paper anlyzes the test results of two kinds of key parameters in regard to soil shear strength,ie four parameters：cohesion C,internal frication angle Ф,effective cohesion C＇and effective internal friction angle Ф ,subsequently,conducts comparison with the shear strength indexes of soil used to analyze stability of dam slope in this earth-rock dam＇s preliminary desigh.According to the computation results of stability analysis using the statistical parameter values of test, the paper considers that soil shear strength indexes of earth fill can meet the design demand.