| 压实红黏土的湿化变形试验研究 |
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| 引用本文： | 谈云志,孔令伟,郭爱国,万智.压实红黏土的湿化变形试验研究[J].岩土工程学报,2011,33(3):483. |
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| 作者姓名： | 谈云志 孔令伟 郭爱国 万智 |
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| 作者单位： | 1. 三峡大学三峡库区地质灾害教育部重点实验室，湖北 宜昌443002；2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室， |
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| 基金项目： | 国家自然科学基金项目(51009084); 交通部西部交通建设科技项目(200631878530); 中国科学院知识创新工程重要方向项目(kzcx2-yw-150); 岩土力学与工程国家重点实验室重点项目(SKLZ0803) |
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| 摘 要： | 为模拟路基土体在湿化与交通荷载耦合作用下的变形规律，对传统湿化变形试验方法进行了改进，并研制出一套改进后的湿化变形试验装置。认为湿化变形是由基质吸力丧失而产生，由此推导出丧失基质吸力与湿化变形的定量关系。利用改进的装置研究了红黏土的湿化变形规律及其湿化变形模量。结果表明，红黏土的初始压实状态对其变形影响显著，变形过程可以分为启动、加速和稳定三个阶段。未湿化试样的变形主要发生在启动阶段，而湿化试样的变形则主要发生在加速阶段。
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| 关 键 词： | 红黏土 路基 湿化变形 湿化模量 |
Experimental study on wetting deformation of compacted laterite |
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| TAN Yun-zhi,KONG Ling-wei,GUO Ai-guo,WAN Zhi.Experimental study on wetting deformation of compacted laterite[J].Chinese Journal of Geotechnical Engineering,2011,33(3):483. |
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| Authors: | TAN Yun-zhi KONG Ling-wei GUO Ai-guo WAN Zhi |
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| Affiliation: | 1. Three Gorges University Key Laboratory of Geological Hazards in Three Gorges Reservoir Area, Ministry of Education, Yichang 443002, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. Hunan Communications Research Institute, Changsha 410015, China; |
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| Abstract: | In order to simulate the subgrade deformation caused by the coupling effect of wetting and traffic loads,the traditional wetting deformation test method is improved,and a set of upgraded wetting-deformation equipments are developed.It is regarded that the wetting deformation is generated by the loss of matrix suction,and a constitutive relationship between lost matric suction and wetting deformation deduced.Finally,the wetting-deformation regularity and modulus are studied by using the improved device.The r... |
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| Keywords: | laterite subgrade wetting deformation wetting modulus |
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