| 降雨时黏性土边坡的离心模型试验 |
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| 引用本文： | 钱纪芸,张嘎,张建民,李焯芬.降雨时黏性土边坡的离心模型试验[J].清华大学学报(自然科学版),2009(6). |
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| 作者姓名： | 钱纪芸 张嘎 张建民 李焯芬 |
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| 作者单位： | 清华大学水沙科学与水利水电工程国家重点实验室; |
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| 基金项目： | 国家重点基础研究发展计划(2007CB714108);;国家自然科学基金资助项目(50778105) |
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| 摘 要： | 为研究降雨引起的黏性土边坡变形破坏,进行了边坡的降雨离心模型试验。试验中利用自主研制的离心场降雨模拟设备,用图像采集和相关分析方法,观测了降雨过程中土坡的破坏形态和位移场变化过程。结果表明:降雨对边坡稳定性产生很大影响。降雨引起均质土坡发生浅层土体滑移破坏,雨水入渗至土坡较深的位置。降雨引起土坡位移逐渐增大,且变形区域也逐渐扩展,最终形成明显的位移集中区域。土坡中一点位移发展可分为小位移阶段、迅速增大阶段和缓慢增大阶段。
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| 关 键 词： | 土坡变形 土坡破坏 离心模型试验 降雨 |
Centrifuge model tests of cohesive soil slopes during rainfall |
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| QIAN Jiyun,ZHANG Ga,ZHANG Jianmin,LEE Chackfan.Centrifuge model tests of cohesive soil slopes during rainfall[J].Journal of Tsinghua University(Science and Technology),2009(6). |
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| Authors: | QIAN Jiyun ZHANG Ga ZHANG Jianmin LEE Chackfan |
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| Institution: | State Key Laboratory of Hydroscience and Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | Centrifuge model tests were conducted to investigate the deformation and failure mechanism of cohesive soil slopes due to rainfall.A rainfall simulator was used to produce the rainfall during the tests.The failure modes and deformation processes were observed photographically and measured by correlation analysis.The results show that the slope stability is significantly affected by the rainfall.Relatively shallow slips in the slope are caused in the short term by the rainfall with the water penetrating deep... |
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| Keywords: | soil slope deformations soil slope failures centrifuge model tests rainfall |
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