三峡大学学报（自然科学版）2026，Vol.48Issue(1)：49-56,8.DOI:10.13393/j.cnki.issn.1672-948X.2026.01.007
三峡库区消落区岩体劣化致灾机制研究
Research on the Disaster-Inducing Mechanism of Rock Mass Deterioration in the Hydro-Fluctuation Belt of the Three Gorges Reservoir Area:a Case Study of the Kamenziwan Landslide
摘要
Abstract
With the Three Gorges Reservoir entering the stable operation stage,the periodic rise and fall of the reservoir water level has induced rock mass deterioration in the bank slope of hydro-fluctuation belt,which has become an important inducement for a new type of landslide in the reservoir.Field investigations,laboratory experiments,and numerical analysis were used to study the process and disaster causing mechanism of rock mass deterioration in the Kamenziwan landslide.The rock mass in the hydro-fluctuation belt at the front edge of the Xietan riverbank slope exhibited a typical"onion peeling"deterioration characteristic.Tests shown that the wetting-drying cycles could lead to deterioration phenomena such as sandstone erosion and crack propagation.It could also cause changes in the particle connections of the weak layers of mudstone,thereby weakening the shear resistance.Further numerical analysis and research were carried out,and the disaster-causing mechanism of rock mass deterioration of the Kamenziwan landslide was proposed.The results show that the deterioration and disintegration of rock mass in the hydro-fluctuation belt can result in the loss of the resistance to sliding at the front edge of the bank slope.The weak rock layers are further softened and argillized to form a sliding zone.The failure characteristics of the landslide are of the retrogressive type,and the failure mode is of the sliding-tensile cracking type.The research can provide a cer-tain theoretical basis for the prevention and control of landslide disasters in the Three Gorges Reservoir Area.关键词
三峡库区/消落区/岩体劣化/顺层岩质滑坡/劣化致灾Key words
Three Gorges Reservoir Area/hydro-fluctuation belt/rock mass deterioration/bedding rock bank slope/deterioration-induced disaster分类
天文与地球科学引用本文复制引用
杨剑飞,张国栋,耿峻,章广成,张亚鑫..三峡库区消落区岩体劣化致灾机制研究[J].三峡大学学报（自然科学版）,2026,48(1):49-56,8.基金项目
国家自然科学联合重点基金项目(U2340230) （U2340230）
科技部湖北长江三峡滑坡国家野外科学观测研究站专项(Z2022106) （Z2022106）
