| 不同地区Q_2黄土的结构性对比分析 |
| |
| 引用本文： | 王辉,何青峰,谢星,赵法锁.不同地区Q_2黄土的结构性对比分析[J].中国地质灾害与防治学报,2010,21(4):99-103. |
| |
| 作者姓名： | 王辉 何青峰 谢星 赵法锁 |
| |
| 作者单位： | [1]长安大学地质工程与测绘学院,陕西西安710054 [2]河南理工大学土木工程学院,河南焦作454000 [3]西安科技大学地质与环境学院,陕西西安710054 [4]长安大学地球科学与国土资源学院,陕西西安710054 |
| |
| 基金项目： | 国家自然科学基金资助项目 |
| |
| 摘 要： | 对延安和西安Q2黄土进行了单轴压缩和CU剪切试验,研究了含水量和围压对其结构性的影响。结果表明,单轴压缩条件下两地Q2黄土的结构屈服应变均较小,且随含水量变化不明显,而结构屈服强度均随含水量增加呈指数减少。CU剪切条件下含水量和围压都对其结构性有明显的影响,围压增大时两地Q2黄土的结构屈服应力和结构屈服应变均增大,含水量增大时结构屈服应力减低,较大围压和较高含水率时,结构屈服段的应力应变曲线由强软化型向较强软化型甚至弱软化型转变。由于西安Q2黄土和延安Q2黄土的沉积环境不同,使其低含水量时结构屈服强度高于延安Q2黄土,而高含水量时结构屈服强度低于延安Q2黄土。
|
| 关 键 词： | 黄土 结构性 含水量 围压 |
Comparation for structural behavior of Q2 loess in different regions |
| |
| WANG Hui,HE Qing-feng,XIE Xing,ZHAO Fa-suo.Comparation for structural behavior of Q2 loess in different regions[J].The Chinese Journal of Geological Hazard and Control,2010,21(4):99-103. |
| |
| Authors: | WANG Hui HE Qing-feng XIE Xing ZHAO Fa-suo |
| |
| Institution: | 1.College of Geology Engineering and Geomatics of Changan University,Shaanxi Xi’an 710054,China;2.School of Civil Engineering of Henan Polytechnic University,Henanjiaozuo 454000,China;3.College of Geology and Environ-mental,Xi’an University of Science and Technology Shaanxi,Xi’an 710054,China;4.School of Earth Sciences and Resources Management,Chang’an University,Shaanxi X i’an 710054,China) |
| |
| Abstract: | Q2 loess in Xian area and Yanan area are studied by the uniaxial compression test and the CU shear test,results show that the structural yield strains are all smaller,and do not change significantly with the water content,structural yield stresses are decreasing exponentially with water contents increasing in the former test.Structural behavior is influenced obviously by water content and confining pressure in the latter test,structural yield strains and yield pressures of loess in two regions all increase with the confining pressure increasing,but the structural yeild pressures decrease with water contents increasing.Stress-strain curves in structural yield phase change from strong strain-soften type to weaker and even weak strain-soften type with higher confining pressure and higher water content.Because of different sedimentary environments,structural yeild pressure of Q2Loess in Xian is higher when the water content is lower,but lower when the water content is higher. |
| |
| Keywords: | loess structural behavior water content confining pressure |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
