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| 基于MK模型推算非饱和膨胀土土-水特征曲线 | |
| 引用本文： | 潘宗俊,文明勇,陈金霞. 基于MK模型推算非饱和膨胀土土-水特征曲线[J]. 公路交通科技, 2009, 26(8) |
| 作者姓名： | 潘宗俊 文明勇 陈金霞 |
| 作者单位： | 1. 交通部公路科学研究院,北京,100088 2. 湖北省仙桃市公路管理局,湖北,仙桃,433000 |
| 摘 要： | 根据非饱和膨胀土基本土性参数,应用MK模型推算非饱和土土-水特征曲线.模型把毛细管力和粘附力相耦合,二者均会诱发吸力的变化.并在西安--汉中高速公路(GZ40)槐树关段K5+120取膨胀土土样,测定基本土性参数.结果表明:毛管力的饱和度Sc在低吸力值时起到重要的作用,而当毛细水散失,粘附力的饱和度Sa起到决定性作用.与采用离心试验确定的土-水特征曲线相比较,基于MK模型根据基本土性参数推算非饱和膨胀土土-水特征曲线,其推算值与实测值较为接近,推算与实测土-水特征曲线形状相吻合. |
| 关 键 词： | 道路工程 MK模型 非饱和膨胀土 土-水特征曲线 吸力 |
Prediction of Soil-water Characteristic Curve of Unsaturated Expansive Soils Based on MK Model |
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| PAN Zongjun,WEN Mingyong,CHEN Jinxia. Prediction of Soil-water Characteristic Curve of Unsaturated Expansive Soils Based on MK Model[J]. Journal of Highway and Transportation Research and Development, 2009, 26(8) | |
| Authors: | PAN Zongjun WEN Mingyong CHEN Jinxia |
| Affiliation: | 1.Research Institute of Highway;Ministry of Communications;Beijing 100088;China;2.Hubei Xiantao Highway Administration;Xiantao Hubei 433000;China |
| Abstract: | The soil-water characteristic curve was reckoned by using MK model based on the basic soil parameters of unsaturated expansive soil.The model couples the capillary force and adhesion,both of which will induce suction changes.Soil samples were collected in Huaishuguan section K5+120 of Xi'an-Hanzhong highway(GZ40),and the basic soil parameters were measured.The result shows that the capillary force's saturation Sc plays an important role when the suction is lower while the adhesion's saturation Sa plays a de... |
| Keywords: | road engineering MK model unsaturated expansive soil soil-water characteristic curve suction |
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