The Influence of Rain-Type on the Seepage and Stability of Purple Silty Cohesive Soil Slope

Abstract

To study the variation law of internal seepage and stability of purple silty cohesive unsaturated soil slope under different rain patterns, we use GeoStudio to calculate and analyze the changes of pore water pressure and safety factor of the slope after undergoing three rain patterns, namely, front peak pattern, back peak pattern and step pattern, under the action of moderate rain, heavy rain and rainstorm. Research has found that under the same conditions, it takes the longest time for the pore water pressure under the back peak type to reach stability, and the slope safety factor decreases the most. Therefore, it is necessary to strengthen the management of slope stability protection after rainfall in the back peak type.