| 超饱和含水率和温度对冻结砂土强度的影响 |
| |
| 引用本文： | 赖远明,张耀,张淑娟,金龙,常小晓.超饱和含水率和温度对冻结砂土强度的影响[J].岩土力学,2009,30(12):3665-3670. |
| |
| 作者姓名： | 赖远明 张耀 张淑娟 金龙 常小晓 |
| |
| 作者单位： | 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室，兰州 730000 |
| |
| 基金项目： | 国家自然科学基金重点资助项目，中国科学院知识创新工程重要方向项目，国家自然科学基金重点资助项目，冻土工程国家重点实验室开放基金项目 |
| |
| 摘 要： | 以青藏铁路沿线的冻结砂土为研究对象，结合铁路沿线地温和含水率的分布特征，进行了温度为-0.5～-6.0℃，含水率为30%～80%（超饱和）条件下的三轴抗压强度试验，分析了不同温度下砂土强度随含水率的变化特征以及同一含水率下砂土强度对温度的依赖性。并根据不同温度下砂土强度随法向应力的变化规律，给出了相应的冻土强度屈服准则。
|
| 关 键 词： | 冻结砂土 抗压强度 超饱和高含水率 屈服准则 |
| 收稿时间： | 2008-08-08 |
Experimental study of strength of frozen sandy soil under different water contents and temperatures |
| |
| LAI Yuan-ming,ZHANG Yao,ZHANG Shu-juan,JIN Long,CHANG Xiao-xiao.Experimental study of strength of frozen sandy soil under different water contents and temperatures[J].Rock and Soil Mechanics,2009,30(12):3665-3670. |
| |
| Authors: | LAI Yuan-ming ZHANG Yao ZHANG Shu-juan JIN Long CHANG Xiao-xiao |
| |
| Institution: | State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
| |
| Abstract: | According to the distributing characteristics of water content and ground temperature along Qinghai-Tibet Railway, triaxial compressive experiments of frozen sandy soils from Qinghai-Tibet plateau were conducted with 30%-80% (supersaturated)water contents and temperature ranging from -0.5℃ to -6.0℃. The results show that with increasing water content, strength of sandy soil nonlinearly increases when the testing temperatures is -0.5℃; and it has a minimum value with the temperature of -1.0℃, whereas when the temperature is equal to or below -2.0℃ it gradually decreases. Based on the relationship between the strength and normal stress under different temperatures, yielding criteria of Mises and linear Mohr-Coulomb is used to describe the yielding situation of sandy soil, respectively. |
| |
| Keywords: | frozen sandy soil compressive strength supersaturated water content yielding criteria |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
