| 非饱和土水分特征曲线特性 |
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| 引用本文： | 李志清,李涛,胡瑞林.非饱和土水分特征曲线特性[J].中国公路学报,2007,20(3):23-28. |
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| 作者姓名： | 李志清 李涛 胡瑞林 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,工程地质力学重点实验室,北京,100029
2. 北京交通大学,土木建筑工程学院,北京,100044 |
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| 基金项目： | 国家自然科学基金;国家重点基础研究发展计划(973计划) |
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| 摘 要： | 为了描述非饱和土基质吸力与含水量的关系特性,进行了室内外土体水分特征曲线(SWCC)测试,分析了试样物质成分、塑性指数、孔隙结构、应力状态等因素对SWCC测试的影响;在自然边坡、挖方边坡、填方边坡上进行了基质吸力变化规律的实测,对比了在不同应力、填土条件下基质吸力变化规律的差异性。研究结果表明:同一土体的SWCC并不惟一;可以通过同条件下的室内吸湿曲线来模拟现场基质吸力和含水量的关系;当基质吸力为100~1 000 kPa时,SWCC呈线性关系,使得基质吸力监测的可操作性大大提高。
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| 关 键 词： | 道路工程 非饱和土 试验研究 水分特征曲线 基质吸力 含水量 |
| 文章编号： | 1001-7372（2007）03-0023-06 |
| 收稿时间： | 2006-10-09 |
| 修稿时间： | 2006年10月9日 |
Property of Soil-water Characteristic Curve for Unsaturated Soil |
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| LI Zhi-qing,LI Tao,HU Rui-lin.Property of Soil-water Characteristic Curve for Unsaturated Soil[J].China Journal of Highway and Transport,2007,20(3):23-28. |
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| Authors: | LI Zhi-qing LI Tao HU Rui-lin |
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| Institution: | 1. Key Laboratory of Engineering Geomechanics, Institute of Geology and Geophysics of CAS, Beijing 100029, China; 2. School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | In order to describe the relationship between matrix suction and water content,soil-water characteristic curve(SWCC) tests in lab and field were carried on.The effects of factors,such as substance constitution,plastic index,pore structure,stress history on SWCC were analyzed.The differences of matrix suction variety rules at different stresses and fillings were compared by testing matrix suction at nature slope,excavated slope and filling slope. The study results show that SWCC is not sole in same type soil.Relation between field matrix suction and water conternt was simulated by absorption curves in the lab at the same condition.When the matrix suction is between 100~1 000 kPa, SWCC is linear relation so that feasibility of matrix suction monitoring has much promotion. |
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| Keywords: | road engineering unsaturated soil experimental research soil-water characteristic curve matrix suction water content |
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