考虑应力路径影响的吹填土结构性特征研究
发布时间：2018-11-04 10:15
【摘要】：为了研究应力路径对吹填土结构性特征的影响,利用WF应力路径三轴仪对天津滨海新区吹填土进行常规三轴固结不排水试验及K0固结下的增P、等P、减P应力路径试验,同时进行扫描电镜试验。试验结果分析表明,出现结构屈服的应变量在2%左右;减P、等P、增P应力路径下土体结构屈服应力逐渐增大,并且结构屈服应力随着围压的增大而增大,随着累积变形量的增加则保持一定值。微观结构测试分析表明,吹填土体微观结构变化规律受应力路径和累积变形量影响较为明显,土体结构屈服前后,土体微观结构有着明显的差异。
[Abstract]:In order to study the influence of stress path on the structural characteristics of filling soil, WF stress path triaxial instrument was used to test the normal triaxial consolidation undrained test and K _ 0 consolidation stress path test of blowing fill in Tianjin Binhai New area, and the stress path test of increasing P, equal P and decreasing P under K _ 0 consolidation was carried out. Scanning electron microscopy (SEM) was also performed. The experimental results show that the strain of structural yield is about 2%. The yield stress of soil structure increases gradually with the increase of confining pressure and keeps a certain value with the increase of cumulative deformation. The results of microstructure test and analysis show that the microstructure of soil is affected by stress path and cumulative deformation obviously, and the microstructure of soil is different before and after the yield of soil structure.
【作者单位】： 天津城建大学土木工程学院;天津市软土特性与工程环境重点实验室;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【基金】：国家自然科学基金项目(41372291,51179186) 天津市科技计划项目(15JCZDJC40600,15ZCZDSF00220)资助
【分类号】：TU449
[Abstract]:In order to study the influence of stress path on the structural characteristics of filling soil, WF stress path triaxial instrument was used to test the normal triaxial consolidation undrained test and K _ 0 consolidation stress path test of blowing fill in Tianjin Binhai New area, and the stress path test of increasing P, equal P and decreasing P under K _ 0 consolidation was carried out. Scanning electron microscopy (SEM) was also performed. The experimental results show that the strain of structural yield is about 2%. The yield stress of soil structure increases gradually with the increase of confining pressure and keeps a certain value with the increase of cumulative deformation. The results of microstructure test and analysis show that the microstructure of soil is affected by stress path and cumulative deformation obviously, and the microstructure of soil is different before and after the yield of soil structure.
【作者单位】： 天津城建大学土木工程学院;天津市软土特性与工程环境重点实验室;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;
【基金】：国家自然科学基金项目(41372291,51179186) 天津市科技计划项目(15JCZDJC40600,15ZCZDSF00220)资助
【分类号】：TU449
【相似文献】
相关期刊论文 前10条
1 冯强;杨桂林;;应力路径法及其在实际工程中的应用[J];工程勘察;1991年01期
2 常银生,王旭东,宰金珉,徐建龙;粘性土应力路径试验[J];南京工业大学学报(自然科学版);2005年05期
3 吴桐金;;卸荷软土的应力路径及对强度影响的研究[J];山西建筑;2006年21期
4 周葆春;王靖涛;卫军;;应力路径对重塑粘土本构关系影响的试验研究[J];重庆建筑大学学报;2006年06期
5 路德春;;基于广义非线性强度理论的土的应力路径本构模型[J];岩石力学与工程学报;2007年07期
6 曾玲玲;陈晓平;;软土在不同应力路径下的力学特性分析[J];岩土力学;2009年05期
7 刘祖德,陆士强,杨天林,李柏乔;应力路径对填土应力应变关系的影响及其应用[J];岩土工程学报;1982年04期
8 候恩，
本文编号：2309520
本文链接：https://www.wllwen.com/jingjilunwen/jianzhujingjilunwen/2309520.html
