Abstract: The colluvial clay on the left bank of Shaping hydropower station II is more than 179.9-m thick, with a total volume of 2.403×106 m3. There is great difference on the particle composition and space distribution of the colluvial clay, so the selection of physical mechanical parameters of colluvial clay would directly affect the safety and economy of the project. In this paper, on the basis of laboratory test results, we will comprehensively select the parameters by the engineering analogy method and the empirical formula method.

Key words: colluvial clay, physical mechanical parameters, selection of parameters

摘要： 沙坪二级坝址左岸分布崩坡积体厚度达179.9 m以上，总方量约240.3万m3。崩坡积体颗粒组成极不均一，空间分布差异很大，崩坡积体物理力学参数取值正确与否，直接影响到工程的安全性和经济性。以室内试验成果为基础，结合工程类比法、经验公式法，综合确定左岸崩坡积体的物理力学指标。

关键词: 崩坡积体, 物理力学指标, 参数选择