| 冻融条件下盐渍土抗剪强度特性试验研究 |
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| 引用本文： | 包卫星,杨晓华.冻融条件下盐渍土抗剪强度特性试验研究[J].公路,2008(1):5-10. |
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| 作者姓名： | 包卫星 杨晓华 |
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| 作者单位： | 1. 长安大学公路学院,西安市,710064;新疆交通建设管理局,乌鲁木齐市,830049
2. 长安大学公路学院,西安市,710064 |
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| 基金项目： | 国家西部交通建设科技项目(200331879750) |
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| 摘 要： | 通过对新疆岳普湖~英吉沙公路及和硕~库尔勒高速公路沿线的天然盐渍土室内基本性质试验分析,选取典型天然盐渍土,在开放系统中进行反复冻融循环条件下的试验,从土类角度研究了天然盐渍土在多次冻融循环时的强度变化特征。试验结果表明:经多次冻融循环,低液限粘土试样粘聚力自下而上线性减小,内摩擦角呈S形分布;含砂低液限粘土试样冻融循环过程中,试样粘聚力呈反S形分布,内摩擦角均呈S形分布;低液限粉土试样各层土粘聚力随着冻融循环次数的增加逐渐减小,各土层内摩擦角随着冻融循环次数的增加而减小。
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| 关 键 词： | 道路工程 盐渍土 冻融循环 抗剪强度 粘聚力 内摩擦角 |
| 文章编号： | 0451-0712（2008）01-0005-06 |
| 收稿时间： | 2007-07-23 |
| 修稿时间： | 2007年7月23日 |
Tests and Research on Characteristics of Shear Strength of Saline Soil Under Freeze-Thaw Cycle |
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| BAO Wei-xing,YANG Xiao-hua.Tests and Research on Characteristics of Shear Strength of Saline Soil Under Freeze-Thaw Cycle[J].Highway,2008(1):5-10. |
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| Authors: | BAO Wei-xing YANG Xiao-hua |
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| Abstract: | On the basis of the results of testing saline soil samples of Yue-Ying Highway and He-Ku Expressway,the representative crude saline soil samples are selected for the experiment of freeze-thaw cycle.The characteristics of shear strength of crude saline soil are researched from soil type.The results of tests show that the distribution of cohesion of low liquid-limit clay decreases linearly form bottom to top and the distribution of the angle of internal friction is "S" form under freeze-thaw cycle.The distribution of cohesion of bearing sand low liquid-limit clay is in reverse "S" form.Cohesion of low liquid-limit silt gradually decreases and the angle of internal friction increases with the increase of freeze-thaw cycle number. |
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| Keywords: | road engineering saline soil freeze-thaw cycle shear strength cohesion internal friction angle |
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