| 膨胀土堑坡变形的湿热耦合效应及其与降雨历时的关系 |
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| 引用本文： | 李雄威,孔令伟,郭爱国.膨胀土堑坡变形的湿热耦合效应及其与降雨历时的关系[J].公路交通科技,2009,26(7). |
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| 作者姓名： | 李雄威 孔令伟 郭爱国 |
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| 作者单位： | 1. 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,湖北,武汉,430071;常州工学院土木建筑工程学院,江苏,常州,213002
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,湖北,武汉,430071 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程重要方向项目，交通部西部交通建设科技项目 |
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| 摘 要： | 在广西南宁地区建立了不同开挖坡度的膨胀土边坡,通过现场试验论证出堑坡变形与降雨历时的关系,并分析其湿热耦合效应.历时两个雨季和一个旱季的试验结果表明,坡面水平变形与降雨持续时间具有较好的相关性,只有在一定雨强下持续的降雨过程才能使边坡产生较大的变形;土体含水量变化是影响边坡变形的主要因素,而温度变化是促进因素,二者的耦合作用使得膨胀土边坡趋向不稳定;在考虑膨胀土边坡的渗透特性后,建立了堑坡变形与降雨历时的关系,表达式可用于预测边坡总变形量.也可换算成变形速率对陡坡的变形突变进行预警,具有较强的工程适用性.同时,监测结果也表明,在采用植被防护后膨胀土边坡的变形迅速减小,说明植被护坡是一种有效的堑坡防护方式.
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| 关 键 词： | 道路工程 变形 现场试验 膨胀土路堑边坡 湿热耦合 |
Moisture-heat Coupling Effect of Expansive Soil Cut Slope Deformation and Relationship between Deformation and Raining Time |
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| LI Xiongwei,KONG Lingwei,GUO Aiguo.Moisture-heat Coupling Effect of Expansive Soil Cut Slope Deformation and Relationship between Deformation and Raining Time[J].Journal of Highway and Transportation Research and Development,2009,26(7). |
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| Authors: | LI Xiongwei KONG Lingwei GUO Aiguo |
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| Institution: | 1.State Key Laboratory of Geomechanics and Geotechnical Engineering;Institute of Rock and Soil Mechanics;Chinese Academy of Sciences;Wuhan Hubei 430071;China;2.School of Civil Engineering & Architecture;Changzhou Institute of Technology;Changzhou Jiangsu 213002;China |
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| Abstract: | Expansive soil cut slopes of deferent gradients were built up in Nanning,Guangxi,the relationship between deformation and the raining time was discussed,and the moisture-heat coupling effect of deformation was analyzed through the field test.The test result during one dry season and two rainy seasons in the monitoring period shows that(1) the correlation between horizontal deformation and raining time is well and only successive raining in certain intensity can induce large deformation;(2) the water content... |
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| Keywords: | road engineering deformation field test expansive soil cut slope moisture-heat coupling |
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