Experimental Study on Multistage Seismic Damage Process of Bedding Rock Slope:A Case Study of the Xinmo Landslide

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外文摘要：In the early hours of June 24,2017,a major landslide event occurred in Xinmo Village,Sichuan Province,China.The landslide instantly devastated the whole village.Ten people died and 73 were missing in this major landslide event.The study area has suffered from several strong earth-quakes in the past 100 y.Present studies have reported that the cumulative damage effect of the Xinmo landslide induced by earthquake is obvious.In this study,we conducted a shaking table test based on the detailed geological survey,historical seismic data,satellite optical image,unmanned aerial vehicle photography.The test result presents the characteristics of multistage seismic damage and progressive deformation process of the Xinmo landslide model,and shows that the historical earthquakes have caused serious damage to the interior of rock mass in the source area.The test also shows that the cu-mulative damage of the model increases with an increase in duration of earthquake loading.When the excitation intensity increases to a certain value,the damage accumulation velocity of the model sudden-ly increases.It reveals that frequent historical earthquake loads can be regarded as a main reason for the damage and deterioration of landslide rock mass.Damage accumulation and superposition occur in the slope.Under a long-term gravity,deformation of the slope gradually increases until catastrophic fail-ure is triggered.The progressive deformation process of slope is summarized.Firstly,under strong earthquakes loading,a tensile fracture surface forms at the rear edge of the wavy deformation high and steep bedding slope.It reaches a certain critical depth and expands along the interlayer structural plane.Meantime,damaged fissures perpendicular to the structural plane also appear in the steep-gentle turning area of the slope.Secondly,under a coupling action of seismic loading and gravity,the interlami-nar tensile crack surface at the rear edge of the slope extends to depth continuously.Meanwhile,rock fracture occurs in the steep-gentle turning area.The"two-way damage propagation"mode of the inter-layer tensile crack surface occurs until the sliding surface is connected.However,due to the"locking sec-tion"effect of rock mass at the slope foot,it can still maintain a short-term stability.Thirdly,under the influences of the heavy rainfall before a landslide and the long-term gravity of the upper sliding mass,rock mass in the steep section at the slope foot breaks outward.Finally,a catastrophic landslide occurs.

外文关键词：

Xinmo landslidedamage evolution mechanismprogressive deformation processengi-neering geolgoy

作者：

Jing-Jing Tian、Tian-Tao Li、Xiang-Jun Pei、Jian Guo、Shou-Dao Wang、Hao Sun、Pei-Zhang Yang、Run-Qiu Huang

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作者单位：

State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China

Department of Civil Engineering,Panzhihua University,Panzhihua 617000,China

Power China Chengdu Engineering Corporation Limited,Chengdu 610072,China

基金：

National Natural Science Foundation of ChinaSichuan Science and Technology ProgramSichuan Province Central Government Guides Local Science and Technology Development Special ProjectState Key Laboratory of Geohazard Prevention and Geoenvironment Protection Independent Research Project

项目编号：

423771942023NSFSC02822023ZYD0151SKLGP2021Z008

出版年：

2024

DOI：

10.1007/s12583-023-1829-z

地球科学学刊(英文版)

中国地质大学

地球科学学刊(英文版)

CSTPCD

影响因子：0.724

ISSN：1674-487X

年,卷(期)：2024.35(5)