天然结构性软土解构规律及参数分析

Deconstruction Law of Natural Structured Soft Soil and Its Parameters Analysis

以Bothkennar和Pisa粘土率无关结构性特征试验为基础,对2类基于实测数据的典型解构函数特点进行分析比较,完善了参数评价及取值方法;进一步结合天然Batiscan粘土的CRS以及固结蠕变等率相关结构性特征试验结果,在解构函数中引入了率敏性影响,并利用CRS试验数据对率相关性解构函数的合理性进行了验证。结果表明,2类解构函数都能较好地反映率无关与率相关屈服解构过程,预测结果与试验数据吻合良好。

Based on the strain rate-independent tests for structural characteristics of Bothkennar and Pisa clay, the characteristics of two types of typical deeonstruction functions based on meas- ured data were analyzed and compared, which improves the method of parameters evaluation and choice of value. Further, combining the results of the strain rate-dependent tests with structural characteristics on natural Batiscan clay such as CRS and consolidation creep tests, the rate sensi- tive influence was introduced into the deconstruction functions. Finally, the reasonableness of the strain rate-dependent deconstruction functions was verified by use of CRS test date. The results show that the two types of deconstruction functions can preferably reflect strain rate-independent or strain rate-dependent yield deconstruction process, and the predicted results are in good agree- ment with the experimental data.