文献类型：会议论文

英文题名：Experimental Investigation and Numerical Simulation on Progressive Failure of Landslide Under Different Rainfall Conditions

作者：Ni Jiji[1];Huang Yongliang[1,3];Sha Peng[1,2];Liu Dongyan[1]

机构：[1]Shaoxing Univ, Coll Civil Engn, Shaoxing, Zhejiang, Peoples R China;[2]Key Lab Rock Mech & Geol Disaster, Shaoxing, Zhejiang, Peoples R China;[3]Zhejiang Prov Inst Commun Planning Design & Res, Hangzhou 310000, Peoples R China

会议论文集：14th Congress of the International-Association-for-Engineering-Geology-and-the-Environment (IAEG)

会议日期：SEP 21-27, 2023

会议地点：Chengdu, PEOPLES R CHINA

语种：英文

外文关键词：Landslide; Rainfall infiltration; Progressive failure; Physical modeling test; FLAC(3D)

外文摘要：This paper presents a series of results of landslide model experiments with different rainfall conditions, including the observation of progressive failure on the slope surface, pore water pressure, and soil pressure inside the body. The influence of intermittent and continuous rainfall on the stability of homogenous slope is discussed. On this basis, we construct a numerical model in FLAC(3D) to reproduce the process of model tests. Different rainfall factors that affected the stability of landslide are analyzed along with the model test results. The pore water pressure and soil pressure in the slope increase in proportion with rainfall under both rainfall conditions. The descend order of pore water pressure growth rate is slope middle, slope top, and slope toe. Compared with the pore water pressure in the middle slope under different conditions, the value of intermittent rainfall test is 21.9% higher than that of the continuous rainfall test. On the one hand, pore water pressure exhibits a cumulative effect under the intermittent rainfall condition. On the other hand, pore water pressure, horizontal tensile stress, and maximum displacement increase proportionally with the rainfall intensity under the same rainfall condition. The rainfall with low rainfall intensity is more likely to form infiltration in slope, whereas the high rainfall intensity one has obvious influence on the slope stress field. When the rainfall intensity reaches 30 mm/h, the increase in rainfall intensity can no longer affect the horizontal stress distribution of the slope significantly. Instead, it shows a greater impact on the failure mode of the slope, and the erosion occurs on the surface of the slope.