| 非饱和膨胀土持水能力试验研究* |
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| 引用本文： | 李金玉,杨庆,栾茂田,汪承志.非饱和膨胀土持水能力试验研究*[J].水运工程,2011(5):54-58. |
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| 作者姓名： | 李金玉 杨庆 栾茂田 汪承志 |
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| 作者单位： | 1. 大连理工大学土木水利学院海岸和近海工程国家重点实验室,辽宁大连,116085
2. 大连理工大学土木水利学院海岸和近海工程国家重点实验室,辽宁大连,116085;重庆交通学院河海系,重庆,400074 |
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| 摘 要： | 利用压力板仪,进行不同干密度条件下非饱和膨胀土的土水特性试验,分析膨胀土土水特征曲线的基本特征,探讨干密度对膨胀土持水能力的影响,并根据试验得到的土水特征曲线推出其两个基本特征值。结果表明,不同吸力阶段干密度对持水能力的影响程度不同,对基质吸力低于进气值的边界效应阶段影响不大,基质吸力超过进气值进入转化阶段后,干密度增大明显增强了膨胀土的持水能力;膨胀土的进气值和残余含水率都比较大,并且随着干密度的增大均增大。应用数学模型描述不同干密度膨胀土的土水特征曲线,分析了干密度对数学模型参数的影响,给出了干密度、基质吸力和饱和度的函数表达式。
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| 关 键 词： | 膨胀土 干密度 土水特征曲线 持水能力 进气值 残余含水率 |
Experimental research on water retention capacity of unsaturated expansive soil |
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| LI Jin-yu,YANG Qing,LUAN Mao-tian,WANG Cheng-zhi.Experimental research on water retention capacity of unsaturated expansive soil[J].Port & Waterway Engineering,2011(5):54-58. |
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| Authors: | LI Jin-yu YANG Qing LUAN Mao-tian WANG Cheng-zhi |
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| Institution: | LI Jin-yu1,YANG Qing1,LUAN Mao-tian1,WANG Cheng-zhi2(1.State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,School of Civil and Hydraulic Engineering,Dalian 116085,China,2.College of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | The experimental research on soil water characteristics of expansive soil with different dry density is carried out by the pressure plate.The basic characteristics are analyzed on the soil water characteristic curve(SWCC).The effect of dry density is discussed on water retention capacity.The two basic eigenvalues are deduced according to the soil water characteristic curve.The results show that the effect is varied in the regime of SWCC.Dry density has little effect on the boundary effect stage when the mat... |
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| Keywords: | expansive soil dry density SWCC water retention capacity air-entry value resident water content |
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