Slope Stability Analysis of Unsaturated Soil Considering Rainfall Patterns Based on Landslides Inventory
Rainfall-induced slope disasters occurs in many parts of the world during rainy season.Rainfall as one of the most significant factor related to the landslides which cause a considerable damage to society.The rainfall-induced landslide in unsaturated slopes are generally shallow failure and are triggered by decrease in matric suction of slope during rainfall.In this paper, effects of rainfall patterns on stability of the unsaturated weathered soil slope, Korea were investigated.Many slope failure have been attributed to rainfall patterns.Landslides inventory consisted of 170 landslides data from 1999 to 2011 was used to induce rainfall patterns.Two rainfall patterns(strong major rainfall, strong antecedent rainfall) was estimated by analyzing the landslide inventory.This study focused on the effect of rainfall pattern on the stability of slopes.Combined seepage and stability analyses were performed to study the stability of slope subjeted to various rainfall patterns.As a results, strong antecedent rainfall pattern resulted in high reduction in factor of safety.Constant rainfall pattern does not fit well with natural phenomena.
slope failure landslides inventory rainfall patterns antecedent rainfall
Yun-Tae Kim Ji-Sung Lee Min-Su Jung Young-Karb Song
Pukyong National University, Department of Ocean Engineering, Republic of Korea
国际会议
World Landslide Forum 3(第三届世界滑坡论坛)
北京
英文
185-190
2014-06-02（万方平台首次上网日期，不代表论文的发表时间）