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Analysis of Change Rule of Moisture Content for Soil-Slope under Rainfall Infiltration
Rainfall is one of the main factors to induce landslides, mainly because it causes the moisture content of landslide mass to increase by the process of rainfall infiltration. In this paper, (1) the rain-induced soil-slope is taken as an example; (2) the percolation process of rainfall in landslide mass is described; and, (3) the relationship between slope failure mode and slope moisture content increase in high intensity rainfall is studied. Transit seepage caused by rainfall infiltration is simulated by adopting the SEEP/W software, and moisture content of shallow soils is analyzed from back to front of the landslide. Using SLOPE/W software, the landslide stability is calculated during a continuous precipitation process. The study shows that rainfall mainly influences the upper soil. The shallow part of the soil-slope will be saturated immediately and the temporary saturated zone is formed. This leads the matric suction of the shallow slope body to reduce and slip. That is to say, rainfall is more likely to cause shallow slope and local slope. Lastly, the changing model of moisture content in soil-slope is put forward when shallow slope occurs during the process of continuous rainfall. Combining the real time monitoring data of moisture content and pore water pressure, the shallow slope stability can be qualitatively evaluated. This model can be a reference for the monitoring, early warning and prevention of rainfall-induced shallow landslide.
Analysis of Change Rule of Moisture Content for Soil-Slope under Rainfall Infiltration
Rainfall is one of the main factors to induce landslides, mainly because it causes the moisture content of landslide mass to increase by the process of rainfall infiltration. In this paper, (1) the rain-induced soil-slope is taken as an example; (2) the percolation process of rainfall in landslide mass is described; and, (3) the relationship between slope failure mode and slope moisture content increase in high intensity rainfall is studied. Transit seepage caused by rainfall infiltration is simulated by adopting the SEEP/W software, and moisture content of shallow soils is analyzed from back to front of the landslide. Using SLOPE/W software, the landslide stability is calculated during a continuous precipitation process. The study shows that rainfall mainly influences the upper soil. The shallow part of the soil-slope will be saturated immediately and the temporary saturated zone is formed. This leads the matric suction of the shallow slope body to reduce and slip. That is to say, rainfall is more likely to cause shallow slope and local slope. Lastly, the changing model of moisture content in soil-slope is put forward when shallow slope occurs during the process of continuous rainfall. Combining the real time monitoring data of moisture content and pore water pressure, the shallow slope stability can be qualitatively evaluated. This model can be a reference for the monitoring, early warning and prevention of rainfall-induced shallow landslide.
Analysis of Change Rule of Moisture Content for Soil-Slope under Rainfall Infiltration
Zhang, Guirong (author) / Li, Denghua (author) / Qian, Yajun (author) / Zhao, Bo (author)
Geo-Shanghai 2014 ; 2014 ; Shanghai, China
Soil Behavior and Geomechanics ; 214-223
2014-05-05
Conference paper
Electronic Resource
English
Analysis of Change Rule of Moisture Content for Soil-Slope under Rainfall Infiltration
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