中国地质灾害与防治学报2026，Vol.37Issue(3)：82-95,14.DOI:10.16031/j.cghc.202510022
降雨诱发碎石土滑坡模型试验研究
Model test study on rainfall-induced gravelly soil landslides
摘要
Abstract
Under the background of frequent extreme rainfall,rainfall-induced gravelly soil landslides have become a major disaster type in the mountainous areas of Southwest China.To systematically reveal the deformation mechanism of landslides with different gravel contents under the combined action of rainfall and groundwater level,this study employs laboratory model tests.Four gravel content scenarios(10％,20％,30％,40％)are simulated to analyze the variation laws of volumetric moisture content,pore water pressure,earth pressure,and deformation displacement.The study investigates the evolution patterns of landslides under different conditions and verifies the findings through field case comparisons.The results show that with the increase of gravel content,soil porosity and permeability coefficient increase,the peak values of volumetric water content and pore water pressure decrease significantly,earth pressure increases,and the overall sliding risk reduces.The earth pressure at different positions of the landslide shows different responses:the earth pressure at the rear and central zones first increases and then gradually stabilizes.Meanwhile,with the increase of gravel content,the failure mode of the landslide changes from a composite evolution mode of frontal traction and rearward thrust to a typical traction evolution mode.The conclusion of the model test is consistent with field cases,confirming that gravel content is a key parameter affecting the evolution path of landslides,which provides a reference for the early identification,stability evaluation,and treatment of gravelly soil landslides under high groundwater conditions.关键词
降雨/地下水位/碎石土滑坡/模型试验/变形机理Key words
rainfall/groundwater level/gravelly soil landslide/model test/deformation mechanism分类
天文与地球科学引用本文复制引用
谢强,吕冠贤,杨涛,涂正楠,班宇鑫..降雨诱发碎石土滑坡模型试验研究[J].中国地质灾害与防治学报,2026,37(3):82-95,14.基金项目
山地城镇建设与新技术教育部重点实验室开放基金(LNTCCMA-20250109) （LNTCCMA-20250109）
