[Objective]This study aims to investigate the causes of typical soil landslides in eastern Jiangxi and as-sess the influence of rainfall on slope stability in the region.[Methods]Using the Ziwu landslide in Guangfeng District,Shangrao City,Jiangxi Province as a case study,this paper conducted a comprehensive analysis of rainfall data and surface displacement monitoring.A two-dimensional(2D)mechanical model was established using GeoS-tudio finite element software to simulate the deformation of small residual slope soil landslides under different rain-fall conditions.This study analyzes the local rainfall characteristics,modeled four typical rainfall patterns across five scenarios,applied multiple linear regression to fit the data,and developed an I-D-Fs evaluation model.[Re-sults]The results show that(1)the peak values of earth pressure and soil moisture content are 16.8 kPa and 16.3％,respectively,with a 3 to 5 days lag between rainfall onset and the increase in these values during the early sta-ges of rainfall;(2)rainfall is the primary trigger for landslides,which progress through three distinct phases:Creeping of the front slope,pulling of the rear slope,and sudden sliding of the whole slope;and(3)rainfall pat-terns significantly impact slope stability,necessitating seasonal monitoring and early warning systems.During peri-ods of low rainfall,uniform rainfall is the most detrimental,decreasing the stability coefficients by 2％compared to other patterns.During heave rainfall,frontal rainfall is the most hazardous,decreasing the stability coefficient by 8％compared to other patterns.[Conclusion]These results provide a scientific basis for the monitoring and early warning of shallow soil landslides.
维普
万方数据