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Influence of mechanical properties on the coefficient of lateral earth pressure at rest of frozen soils
Cold Regions Science and Technology ( IF 4.1 ) Pub Date : 2020-06-01 , DOI: 10.1016/j.coldregions.2020.103057
Xiaoliang Yao , Mingyi Zhang , Guofang Xu , Fan Yu

Abstract In this paper, a theoretical expression of the coefficient of lateral earth pressure at rest (K0) for frozen soils is deduced based on a rate dependent model considering the time related parabolic strength envelope. The deduced expression is then verified with the test results of a fine-grained frozen soil. Comparison of calculated and testing results indicated that the characteristics of strength envelope is crucially important for the accuracy in K0 calculation; while it has little influence on the nonlinear increase tendency of K0 with axial stress. Further analysis shows that, with changes of parameters other than the strength envelope characteristics, the elastic solution of K0 is a limit of K0 calculated from the model. It is also found that the generally accepted empirical relationship between effective angle of internal friction and K0 for unfrozen soil is not applicable for the investigated frozen soil.

中文翻译:

力学特性对静息土侧向土压力系数的影响

摘要 本文在考虑抛物线强度包络线的速率相关模型的基础上,推导了冻土静止侧向土压力系数(K0)的理论表达式。然后用细粒冻土的测试结果验证推导出的表达式。计算结果与试验结果对比表明,强度包络线的特性对K0计算的准确性至关重要;而对 K0 随轴向应力的非线性增加趋势影响不大。进一步分析表明,随着强度包络特性以外参数的变化,K0的弹性解是模型计算出的K0的极限。
更新日期:2020-06-01
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