河北地质大学学报2026，Vol.49Issue(2)：95-104,10.DOI:10.13937/j.cnki.hbdzdxxb.2026.02.011
中国西部深切峡谷区某崩滑体成因机制与稳定性分析
Analysis of the Formation Mechanism and Stability of a Collapse Landslide Body in a Deep Canyon Area of Western China
卜新峰1
作者信息
- 1. 成都理工大学 环境与土木工程学院,四川 成都 610059
- 折叠
摘要
Abstract
The geological environment in a deep canyon area of western China is complex,with intense tectonic activities and numerous geological disasters such as landslides and collapses.The causes are diverse,and the stability of the accumulation bodies has drawn much attention.This paper analyzes the environmental conditions for the formation of large accumulation bodies and their deformation and failure modes through field geological investigations and geotechnical tests,and uses FLAC3D to simulate the stability of accumulation bodies under heavy rainfall.The research results show that the accumulation body is composed of multiple high-altitude landslide and collapse accumulation bodies,with a volume of approximately 2.9×106 m3,and is a large-scale landslide and collapse body.Its front edge overhangs the fifth-level terrace,and the sliding bed is composed of mixed schist and gneissic granodiorite.The sliding source area is located on both sides of the upper and lower plates of the strike-slip fault.The formation process consists of three stages:unloading rebound,shear sliding along the large structural plane on the inclined slope,and multiple instabilities triggered by high-intensity events.The deformation and failure mode is classified as"sliding-tensile cracking type".The accumulation body is currently stable,but under the influence of heavy rainfall,local instability may occur.关键词
大型崩滑体/变形破坏模式/稳定性/数值模拟Key words
large collapse landslide body/deformation failure mode/stability/numerical simulation分类
天文与地球科学引用本文复制引用
卜新峰..中国西部深切峡谷区某崩滑体成因机制与稳定性分析[J].河北地质大学学报,2026,49(2):95-104,10.
