水力发电学报2025，Vol.44Issue(10)：1-13,13.DOI:10.11660/slfdxb.20251001
三峡库区土质岸坡"侵蚀-塌岸"地质力学模型
Erosion and bank collapse geomechanical model for soil-type bank slopes in Three Gorges Reservoir area:A case study of bank slope from Badong to Wushan
摘要
Abstract
The erosion and bank collapse of soil bank slopes is currently the most prevalent and increasingly severe disaster problems in mountainous reservoir areas,and developing a geomechanical model for this event is the key to prediction and prevention of such disasters.This study constructs an erosion and bank collapse geomechanical model for simulating the soil bank slopes under erosion-through a combination of field investigations,theoretical analyses,laboratory geotechnical tests,and model tests-and applies it in a case study of the Wushan-Badong section of the Three Gorges reservoir area.We have found that the modes of soil bank collapse in the reservoir area can be clarified as two major types-collapse-slip and progressive erosion.Using the data of typical cases,we examine and summarize the characteristics of bank collapse and material composition of the two types.This model is validated under the conditions of the two collapse types with wave action.The results show that for the two types,the model predictions agree with our field observations,verifying the model's applicability and reliability.For the collapse-slip type,local wave scour niches are generated first;As these niches develop and come to connection,the bank slope under gravity collapses or slides eventually.In the case of progressive erosion failure,wave erosion niches are also formed in the initial stage due to wave scour.As the eroding process accelerates,wave abrasion eventually dominates.This study lays a basis for further study aimed at prediction and prevention of the bank collapse disasters in reservoir areas.关键词
三峡库区/地质灾害/塌岸/地质力学模型/模型试验Key words
Three Gorges Reservoir area/geological hazard/bank collapse/geomechanical model/model test分类
天文与地球科学引用本文复制引用
王力,谢明景,王世梅,贺元源,张晨宇,范志宏..三峡库区土质岸坡"侵蚀-塌岸"地质力学模型[J].水力发电学报,2025,44(10):1-13,13.基金项目
国家自然科学基金重点项目(U21A2031) （U21A2031）
中国博士后科学基金(2021M701969) （2021M701969）
