| 降雨强度对松散堆积土斜坡破坏的模型试验研究 |
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| 引用本文： | 尹洪江,王志兵,胡明鉴. 降雨强度对松散堆积土斜坡破坏的模型试验研究[J]. 土工基础, 2011, 25(3): 74-76 |
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| 作者姓名： | 尹洪江 王志兵 胡明鉴 |
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| 作者单位： | 1. 北京交通大学,北京,100044
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试验室,武汉,430071 |
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| 基金项目： | 国家自然科学基金资助项目，国家自然科学基金青年基金资助项目 |
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| 摘 要： | 通过在室内构建泥石流源区松散堆积土体斜坡模型,采用三种不同降雨强度对其稳定性进行研究。得出了不同降雨强度下斜坡土体流失规律与斜坡的失稳方式。结果表明：在低雨强（26mm/h）作用下,松散斜坡的土体流失量最少,并以坡面侵蚀为主;在中、高雨强（51mm/h,68mm/h）作用下,首先表现为坡面侵蚀和沟道侵蚀,进而是大规模土体流滑破坏,在土体累积流失量与时间曲线上有突变点;在高雨强作用下,形成了阵性泥石流。
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| 关 键 词： | 泥石流 降雨强度 模型试验 土体流失量 斜坡失稳模式 |
Influence of Rainfall Intensity on Loose Deposits Slopes Failure by Model Tests |
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| YIN Hong jiang,WANG Zhi bing,HU Ming jian. Influence of Rainfall Intensity on Loose Deposits Slopes Failure by Model Tests[J]. Soie Engineering and Foundation, 2011, 25(3): 74-76 |
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| Authors: | YIN Hong jiang WANG Zhi bing HU Ming jian |
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| Affiliation: | 1.Beijing Jiaotong University,Beijing 100044;2.State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China) |
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| Abstract: | There are indoor artificial rainfall experiments in self-designed model under different rainfall intensity(26 mm/h,51 mm/h,68 mm/h)to study the mechanism of loose deposit slope stability in the debris region.The results showed that the soil loss under low rainfall intensities of 26mm/h is least,and the failure mode of slope is slope surface erosion;but under high rainfall intensities of 51 and 68mm/h,both failure modes of slope are slope surface erosion and gully erosion,and flowslide is the main failure mode,which are correspond to the mutation point of curve of cumulative soil loss vs time.Intermittent debris flow is formed under high rainfall intensities of 68 mm/h. |
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| Keywords: | debris flow rainfall intensity model experiment soil loss mode of slope instability |
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