人民长江2026，Vol.57Issue(2)：117-123,142,8.DOI:10.16232/j.cnki.1001-4179.2026.02.014
金沙水电站坝后高位滑坡变形历史及成因分析
Deformation history and genesis analysis of high-elevation landslide behind dam of Jinsha Hydropower Station
摘要
Abstract
In recent years,repeated deformations have occurred on the high-elevation slope on the right bank of the Jinsha Hy-dropower Station in the Jinsha River,threatening the safety of the downstream dam.Focusing on the Shanliangzi Landslide,a high-elevation failure associated with a behind-dam abandoned mining area at the Jinsha Hydropower Station,this study systemati-cally investigated the time-series deformation curves and historical failure processes before and after landslide mitigation.Multi-ple technical approaches were integrated,including field reconnaissance,unmanned aerial vehicle(UAV)photogrammetry,visual interpretation of optical remote sensing satellite imagery,and time-series InSAR analysis based on Sentinel-1A ascending orbit data.The key findings were as follows:①Field investigations revealed that the 2018 landslide was primarily triggered by two fac-tors:roof collapse of the underlying abandoned mining area and rainfall infiltration.② Comprehensive analysis indicated that the tensile stress zone induced by mining-induced roof caving propagated from the slope surface upward to the crest,resulting in ten-sile cracking and subsidence at the landslide's rear edge.Primarily influenced by self-weight,the rock-soil mass exhibited a tendency to move downward toward the free face.Gradual expansion and interconnection of the lower cracks and rear-edge ten-sile cracked eventually formed a continuous sliding surface.The failure mode of the Shanliangzi Landslide was classified as a"col-lapse-tensile cracking"retrogressive type.③ Field surveys in 2024 identified newly developed cracks at the landslide's front edge.InSAR interpretation results further confirmed that the slope,despite mitigation measures,remained influenced by the aban-doned mining area and exhibited ongoing creep deformation characteristics.This study provides references for ensuring the long-term safe operation of the Jinsha Hydropower Station.关键词
高位滑坡/无人机摄影/SBAS-InSAR技术/山梁子滑坡/金沙水电站Key words
high-elevation landslide/unmanned aerial vehicle(UAV)photogrammetry/SBAS-InSAR/Shanliangzi land-slide/Jinsha Hydropower Station分类
建筑与水利引用本文复制引用
蒲佐尧,赵伟华,解明礼,谭林,沈百泉..金沙水电站坝后高位滑坡变形历史及成因分析[J].人民长江,2026,57(2):117-123,142,8.基金项目
地质灾害防治与地质环境保护国家重点实验室自主研究课题(SKLGP2023Z021) （SKLGP2023Z021）
四川省重点研发(区域创新合作)项目(2025YFHZ0314) （区域创新合作）
