两种黏粒含量淤泥质粉质黏土动残余应变试验
发布时间：2018-07-24 11:36
【摘要】：通过两种不同黏粒含量的淤泥质粉质黏土动三轴试验,研究了黏粒含量对试样无侧限抗压强度及灵敏度、动残余应变和动残余孔压的影响。结果表明,黏粒含量高试样的无侧限抗压峰值强度小于黏粒含量低试样的相应强度;黏粒含量高试样的灵敏度大于黏粒含量低试样的相应值;随着动荷载的增加,试样的动残余应变与动残余孔压不断增大,重塑与原状试样动残余应变差值与比值也在增大,并且比值都大于各自的灵敏度;相同动荷载作用下,重塑试样的动残余应变均高于原状试样,黏粒含量高试样的动残余应变比黏粒含量低试样的大。分析认为,土体中黏粒的粘结与润滑双重作用导致两种黏粒含量的试样出现了不同的试验结果。最后采用幂函数模型对渐稳型动残余应变曲线进行拟合,建立了包含循环应力比与振动次数的动残余应变经验公式。
[Abstract]:The effect of clay content on unconfined compressive strength and sensitivity, dynamic residual strain and dynamic residual pore pressure of samples with two different clay content is studied. The results show that the unconfined compressive peak strength of the sample with high clay content is less than the corresponding strength of the sample with low clay content, and the content of clay particles is high. The sensitivity of the sample is greater than the corresponding value of the sample with low clay content. As the dynamic load increases, the residual strain and the dynamic residual pore pressure increase, and the difference and ratio of the remolded and the original specimens are also increased, and the ratios are larger than their respective sensitivity. Under the same dynamic load, the remolded residual strain of the specimen is remolded. The dynamic residual strain of the sample with high clay content is larger than that of the sample with low viscosity. It is believed that the double action of clay particles in the soil leads to the different test results of two kinds of clay content. Finally, the power function model is used to fit the gradually stable dynamic residual strain curve, and the package is set up. An empirical formula for dynamic residual strain including cyclic stress ratio and vibration number.
【作者单位】： 大连理工大学海岸与近海工程国家重点实验室;
【基金】：国家重点基础研究发展计划项目(973计划)(No.2011CB013605) 国家自然科学基金(No.51179023)~~
【分类号】：TU41
本文编号：2141250
[Abstract]:The effect of clay content on unconfined compressive strength and sensitivity, dynamic residual strain and dynamic residual pore pressure of samples with two different clay content is studied. The results show that the unconfined compressive peak strength of the sample with high clay content is less than the corresponding strength of the sample with low clay content, and the content of clay particles is high. The sensitivity of the sample is greater than the corresponding value of the sample with low clay content. As the dynamic load increases, the residual strain and the dynamic residual pore pressure increase, and the difference and ratio of the remolded and the original specimens are also increased, and the ratios are larger than their respective sensitivity. Under the same dynamic load, the remolded residual strain of the specimen is remolded. The dynamic residual strain of the sample with high clay content is larger than that of the sample with low viscosity. It is believed that the double action of clay particles in the soil leads to the different test results of two kinds of clay content. Finally, the power function model is used to fit the gradually stable dynamic residual strain curve, and the package is set up. An empirical formula for dynamic residual strain including cyclic stress ratio and vibration number.
【作者单位】： 大连理工大学海岸与近海工程国家重点实验室;
【基金】：国家重点基础研究发展计划项目(973计划)(No.2011CB013605) 国家自然科学基金(No.51179023)~~
【分类号】：TU41
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