新疆头屯河流域饱和砂砾土动三轴试验研究

发布时间：2018-01-03 01:23

本文关键词：新疆头屯河流域饱和砂砾土动三轴试验研究　出处：《排灌机械工程学报》2016年03期 　论文类型：期刊论文

【摘要】：通过室内动三轴试验,研究了饱和砂砾土在动荷载作用下的动力特性规律,主要分析了振动频率、固结压力和固结应力比对动本构关系和动弹性模量的影响规律.试验结果表明:饱和砂砾土的动本构关系可采用双曲线表示,随着固结压力、固结应力比增大,动本构关系曲线逐步偏向应力轴方向,而振动频率对砂砾土的动本构关系曲线影响较小;动弹性模量Ed随着动应变εd增大而减小,最后趋于平缓,不同的振动频率对饱和砂砾土的Ed-εd关系曲线影响较小,试验数值基本上都落在同一区域内,固结压力与固结应力比对Ed-εd关系曲线的影响较大;不同的振动频率与固结压力作用下的Ed/Ed max-εd关系曲线具有相对良好的归一性,而在不同的固结应力比作用下的试验点归一性较差.
[Abstract]:Through the indoor dynamic triaxial test of saturated three, gravel soil dynamic characteristics in dynamic loads, the main analysis of the vibration frequency, confining pressure and consolidation stress ratio on dynamic constitutive relation and dynamic elastic modulus are analyzed. Experimental results show that the dynamic constitutive relation of saturated sandy soil can be expressed by hyperbolic. With the consolidation pressure, consolidation stress ratio, dynamic constitutive relation curves gradually tend to the stress axis, and vibration frequency on the gravel soil dynamic constitutive relation curve is less affected; the dynamic elastic modulus Ed decreases with dynamic strain increasing D, finally flattening, less influence Ed- e different vibration frequencies of saturated the gravel soil D curve, numerical test basically falls in the same area, consolidation pressure and consolidation stress ratio Ed- e d curve is larger; the vibration frequency and consolidation pressure under different Ed/Ed Max The - epsilon D relation curve has a relatively good normalization, but the test point under the action of different consolidation stress ratio is poor.

【作者单位】：新疆农业大学水利与土木工程学院;
【基金】：2014年度新疆研究生科研创新项目(XJGRI2014071) 新疆农业大学实验室建设与管理改革项目(sysblx022)
【分类号】：TU411
【正文快照】： 张凌凯.新疆头屯河流域饱和砂砾土动三轴试验研究[J].排灌机械工程学报,2016,34(3):260-264.ZHANG Lingkai.Experimental study on dynamic tri-axial test of saturated gravel soil of Toutun river basin in Xinjiang[J].Journalof drainage and irrigation machinery engi

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