Failure mechanism of small-scale soil landslide and quantitative evaluation of rain-induced disaster factors in eastern Jiangxi

• Published in: 地质科技通报 Vol. 43; no. 6; pp. 235 - 243
• Main Authors: Qing LIU, Jianjun GAN, Hao CHEN, Xiaoming LI, Guobin ZHOU
• Format: Journal Article
• Language: Chinese
• Published: Editorial Department of Bulletin of Geological Science and Technology 01.11.2024
• Subjects: deformation mechanism; eastern jiangxi area; i-d-fs model; multiple linear regression; numerical simulation; rain-induced disaster factor; soil landslide
• ISSN: 2096-8523
• DOI: 10.19509/j.cnki.dzkq.tb20230678

Objective This study aims to investigate the causes of typical soil landslides in eastern Jiangxi and assess 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 GeoStudio finite element software to simulate the deformation of small residual slope soil landslides under different rainfall 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. Results 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 stages of