论文标题
与基质的异质颗粒土壤的剪切强度的估计
Estimation of the shear strength of heterogeneous granular soils with matrix
论文作者
论文摘要
通过标准实验室设备的含量大于允许尺寸的颗粒的土壤的机械性能的确定是有问题的。确实有必要消除最粗糙的部分来进行测试，这在结构规模上提出了结果的代表性问题。并行渐变方法是作为一种估算异质颗粒土壤的剪切强度的方法，从其细分的分数中进行了测试。这项研究的重点是罚款内容对这些方法的估计的影响，这尚不清楚。结果表明，尽管罚款很高，但平行渐变方法仍可以预测初始材料的摩擦角。但是，初始材料的内聚力被高估了。至于Fragaszy等人提出的剥布方法，建模材料中较高的罚款含量导致了凝聚力的高估，并低估了初始材料的摩擦角。
The determination of the mechanical properties of soils containing particles larger than the allowable size by standard laboratory equipment is problematic. It is indeed necessary to eliminate the coarsest fraction to carry out the tests, which poses a problem of representativeness of the results at the scale of the structure. Parallel gradation and scalping methods are presented as a means of estimating the shear strength of heterogeneous granular soils from tests on their finer fraction. This study focuses on the effect of fines content on the estimation by these methods, which is not well known. The results showed that the parallel gradation method can predict the angle of friction of the initial material despite a high percentage of fines. However, the cohesion of the initial material was overestimated. As for the scalping method proposed by Fragaszy et al., the higher fines content in the modelled material resulted in an overestimation of the cohesion and an underestimation of the friction angle of the initial material.
