| 干密度和饱和度对重塑非饱和坡积土强度特性影响的试验研究 |
| |
| 引用本文： | 韩中会,陈铖.干密度和饱和度对重塑非饱和坡积土强度特性影响的试验研究[J].路基工程,2017,0(5):64. |
| |
| 作者姓名： | 韩中会 陈铖 |
| |
| 作者单位： | 湘潭大学土木工程与力学学院, 湖南湘潭 411105 |
| |
| 基金项目： | 国家自然科学基金项目（41372314） |
| |
| 摘 要： | 以湘潭北站附近某边坡的坡积土为研究对象，开展3种不同干密度下9组不同饱和度的抗剪强度试验。研究结果表明:干密度越大，非饱和土的抗剪强度越高，且随着饱和度从饱和状态到残余状态呈现增、减和稳定3个阶段；黏聚力也随着饱和度的减小呈现增、减和稳定3个阶段，变化规律近似呈正态分布，内摩擦角随饱和度增大呈非线性减小；黏聚力随干密度的增大而增大，干密度对内摩擦角影响较小；建立了含有饱和度的非饱和土总应力抗剪强度实用公式。
|
| 关 键 词： | 非饱和坡积土 饱和度 干密度 抗剪强度 |
| 收稿时间： | 2019-11-09 |
Experimental Research on Effects of Dry Density and Saturation Degree on Strength Characteristics of Remoulded Unsaturated Colluvial Soil |
| |
| Abstract: | Taking the colluvial soil at certain slope near Xiangtan North Station as the study object, shear strength tests in nine sets of saturation degree and three sets of dry density were carried out. The result shows that, the larger the dry density, the higher the shear strength of unsaturated soil, and as the saturation changes from saturated to residual condition, there presents increasing, decreasing and stable stages; the cohesion also presents increasing, decreasing and stable stages as the saturation degree reduces, in respect of which the change law is somewhat similar to normal distribution; the internal friction angle presents nonlinear decrease as the saturation degree increases; the cohesion increases with the dry density which has less effect on the internal friction angle. Finally, an useful formula of total stress shear strength of unsaturated soil, which contains saturation degree, is established. |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《路基工程》浏览原始摘要信息 |
|
点击此处可从《路基工程》下载全文 |
|
