| 裂隙性黄土在减压三轴压缩下的变形破坏特征 |
| |
| 引用本文： | 卢杰,乐崇浩,卢全中,曹广祝.裂隙性黄土在减压三轴压缩下的变形破坏特征[J].人民长江,2016,46(12):84-88. |
| |
| 作者姓名： | 卢杰 乐崇浩 卢全中 曹广祝 |
| |
| 作者单位： | 1. 昆明理工大学国土资源工程学院,云南昆明,650093;2. 长安大学地质工程系,陕西西安,710054;3. 长安大学地质工程系,陕西西安710054;西部矿产资源与地质工程教育部重点实验室,陕西西安710054 |
| |
| 基金项目： | 国家自然科学基金项目(41272284)，陕西省科技统筹创新工程计划课题(2011 KTZB03-02-02)，国土资源大调查项目(121201001000150122) |
| |
| 摘 要： | 为了研究黄土地区各种开挖工程所引起的土体变形乃至破坏现象,通过对裂隙性黄土样进行减压三轴压缩试验,得到其应力应变关系曲线,总结了裂隙性黄土的变形破坏特征。试验结果表明:减压三轴压缩试验下,裂隙性黄土的应力应变曲线以近似理想塑性或软弱化型为主,随着轴向压力的增大,其软化现象越明显;其总体变形方式为轴向变形和侧向弯曲变形;当土样裂隙角度为45°,60°时,容易沿原裂隙发生剪切破坏。
|
| 关 键 词： | 减压三轴压缩 变形特征 破坏特征 裂隙性黄土 |
Deformation and failure characteristics of fissured loess under decompressed triaxial compression condition |
| |
| Abstract: | For studying the loess deformation and failure characteristics induced by engineering excavation, we studied the failure characteristics of fissured loess by the decompressed triaxial compression test and obtained the stress-strain curve. The summarization of the deformation and failure characteristics of fissured loess shows that the stress-strain curve of fissured loess is strain-soften type or approximately perfect plasticity, the softening phenomenon turns to be obvious with increase of axial stress, the deformation type is mainly axial and lateral bending deformation; the shear deformation is prone to occur along the original fissure when the fissure angles is 45° or 60°. |
| |
| Keywords: | decompressed triaxial compression deformation characteristics failure characteristics fissured loess |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《人民长江》浏览原始摘要信息 |
|
点击此处可从《人民长江》下载全文 |
|
