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下蜀土边坡降雨型滑坡的成因分析

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在分析降雨型滑坡破坏模式以及下蜀土边坡稳定性影响因素的基础上,对南京典型剖面下蜀土物理力学性质进行分析,总结了下蜀土滑坡的主要成因.研究结果表明,随着降雨过程中包气带水分运移,下蜀土非饱和土体边坡内孔隙水压力和岩土界面基质吸力的分布不断发生变化,土体抗剪强度也随之不断变化,受其影响,边坡极易发生降雨型滑坡.
Analysis on causation of rainfall-induced landslide of Xiashu loess slope
Based on the analysis made on the failure mode of rainfall-induced landslide and the factor of impact on the stability of Xiashu loess slope,the physio-dynamical properties of Xiashu loess under the typical profile of Nanjing are analyzed herein,and then the main causation of Xiashu loess slope landslide is summarized as well.The study result shows that the distributions of both the pore water pressure in the unsaturated soil mass of Xiashu loess slope and the matric suction of rock-soil interface continuously change along with the moisture migration of aeration zone during rainfall process,and then the shear strength of the soil mass continuously changes as well,thus the rainfall-induced landslide is particularly prone to be happened on the slope under the impact of this.

Xiashu loessrainfall-induced landslideshear strength indexunsaturated soilmatric suction

孙萍、薛涛、虞玉诚

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金陵科技学院,江苏南京211169

水利部发展研究中心,北京100038

下蜀土 降雨型滑坡 抗剪强度指标 非饱和土体 基质吸力

金陵科技学院引进人才科研启动宁镇地区下蜀土降雨型滑坡机理研究

jit-rcyj-201501

2016

水利水电技术(中英文)
水利部发展研究中心

水利水电技术(中英文)

CSTPCDCSCD北大核心
影响因子:0.456
ISSN:1000-0860
年,卷(期):2016.47(12)
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