防灾减灾工程学报2025，Vol.45Issue(2)：329-337,9.DOI:10.13409/j.cnki.jdpme.20241023005
2024年7·10湖北秭归张家红屋场滑坡基本特征与成因机制研究
Study on Basic Characteristics and Genesis Mechanisms of Zhangjiahongwuchang Landslide in Zigui,Hubei on July 10,2024
摘要
Abstract
At about 11:00 a.m.on July 10,2024,a shallow soil landslide triggered by heavy rainfall oc-curred in Sanxingdian Village,Shazhenxi Town,Zigui County,Yichang City,Hubei Province.The landslide volume was approximately 30×10⁴ m³.Thanks to the timely detection by community-based monitoring and prevention staff,206 individuals from 74 households were successfully evacuated.To investigate the formation process and disaster-inducing mechanism of Zhangjiahongwuchang Land-slide,this study explored its dynamic processes and genesis mechanisms through field surveys,bore-hole data analysis,rainfall data,and numerical simulations.The results of field surveys and borehole data analysis showed that the landslide material consisted of Quaternary gravelly soil with a soil-to-rock ratio of 6:4.The sliding surface was characterized by a"smooth"bedrock-overburden interface,and the catchment area at the rear edge of the slope was 27 545 m².Numerical simulation results dem-onstrated that 16 hours of cumulative rainfall from July 3rd to July 4th led to a significant decrease in landslide stability,and the heavy rainfall on July 9th directly triggered landslide failure.Preliminary re-search suggested that the landslide was located on a unilateral slope on the western flank of the Zigui Syncline.Loose Quaternary gravelly soil and a"smooth"bedrock-overburden interface were internal factors triggering this landslide.External factors included cumulative rainfall of 212 mm from July 3rd to July 4th and heavy rainfall of 170 mm on July 9th,surface runoff from rainfall on the extensive slope outside the landslide that converged into the landslide mass,and abandoned drainage systems on the slope surface of the landslide mass.关键词
浅层土质滑坡/光面型/强降雨/数值模拟/成因机制Key words
shallow soil landslide/smooth surface/heavy rainfall/numerical simulation/genesis mechanism分类
地质学引用本文复制引用
邓茂林,童率,彭旭,魏东,左清军,梁之康,周梦婷,苏鹏民,朱晓涵,李雨洲..2024年7·10湖北秭归张家红屋场滑坡基本特征与成因机制研究[J].防灾减灾工程学报,2025,45(2):329-337,9.基金项目
国家自然科学基金(42172303)、河北省自然科学基金(D2023403055)资助 （42172303）
