文章摘要
初始各向异性砂土不排水剪切特性的试验研究
EXPERIMENTAL STUDY OF SHEAR BEHAVIOR OF INHERENT ANISOTROPY SAND IN UNDRAINED CONDITION
投稿时间:2019-06-27  修订日期:2019-07-15
DOI:
中文关键词: 沉积方向,毛细效应,不排水试验,剪切强度,初始各向异性
英文关键词: sedimentary  direction, capillary  effect, undrained  test, shearing  strength, inherent  anisotropy
基金项目:国家自然科学基金(51609117); 河南省教育厅科学技术研究重点项目(14B560023); 河南省高等学校青年骨干教师培养计划(2018GGJS118)资助.
作者单位E-mail
罗强 南阳师范学院土木建筑工程学院 luoqiang1212@sina.com 
李晓磊 南阳师范学院土木建筑工程学院  
王忠涛 大连理工大学岩土工程研究所  
摘要点击次数: 39
全文下载次数: 
中文摘要:
      合理运用砂土的毛细特性制备具有水平和竖直沉积方向的松、密砂样,进行一系列三轴固结不排水剪切试验,分析沉积方向对砂土偏应力、应力比和孔压的影响,探讨砂土密实程度与该影响的关系。研究结论表明:沉积方向水平时松砂的偏应力极值比沉积方向竖直时的数值小。沉积方向水平时密砂偏应力发展呈应变软化特征,沉积方向竖直时密砂偏应力发展呈应变硬化特征。沉积方向水平时松砂应力比数值比沉积方向竖直时的数值小,沉积方向水平时密砂应力比数值比沉积方向竖直时的数值大。沉积方向水平时孔压发展速度比沉积方向竖直时的速度更快。沉积方向竖直时松砂试样更容易破坏,沉积方向水平时密砂试样更容易破坏。
英文摘要:
      The capillary effect of sand is used to prepare loose and dense sand sample with horizontal and vertical sedimentary directions. A series of traxial shear tests in undrained condition are performed to study sedimentary direction’s influence on the deviation stress, stress ratio and pore pressure, the relation between former influence and relative density is also discussed. The study results show that the deviation stress’s peak value of loose sand is lower when the sedimentary direction is horizontal than the peak value in the condition of vertical sedimentary direction.The deviation stress development of dense sand performs a strain soften characteristic when the sedimentary direction is horizontal, but the deviation stress development of loose sand performs a strain hardening characteristic when the sedimentary direction is vertical. The stress ratio of loose sand is lower in the condition of horizontal sedimentary direction than that in the condition of vertical sedimentary direction. The stress ratio of dense sand is bigger in the condition of horizontal sedimentary direction than that in the condition of vertical sedimentary direction. The pore pressure develops faster in the condition of horizontal sedimentary direction than that in the condition of vertical sedimentary direction. The loose sand sample is easy to reach failure stage with vertical sedimentary direction, and the dense sand sample is easy to reach failure stage with horizontal sedimentary direction.
View Fulltext   查看/发表评论  下载PDF阅读器
关闭