工程地质学报2017，Vol.25Issue(3)：841-852,12.DOI:10.13544/j.cnki.jeg.2017.03.032
库水位升降作用下不同滑面形态老滑坡响应规律
RESPONSE PATTERNS OF OLD LANDSLIDES WITH DIFFERENT SLIP-SURFACE SHAPES TRIGGERED BY FLUCTUATION OF RESERVOIR WATER LEVEL
摘要
Abstract
Much of relevant materials of 463 old landslides which had significant deformation in Three Gorges Reservoir Area are collected from June 2003 to June 2015.This paper studies the evolution models and slip-surface shapes of some typical old landslides.It concludes that there are 4 typical slip-surface shapes of circular,polyline,rectilinear and chair shape.Results of macroscopic analysis of wading extent and deformation time distribution can be summarized as follows.(1) The hydrodynamic pressure has obvious effect on the stability of the circular and rectilinear slip-surface landslides.Most of these two types of landslides deform at the lowering stage of water level when the front or middle is waded,especially after the first time to the highest water level.(2) A small part of the rectilinear slip-surface landslides is deformed at the stage of low water level after the drop because of lags in response.(3)The deformation occurs in the chair-shaped and polygonal line slip-surface landslides at the increasing stage of water level owing to effect of buoyancy weight loss,especially to the first 135m and 175m storage.Most of the chair-shaped slip-surface landslides are deformed when the front is waded as well as the rear wading extent of the polygonal line slip-surface landslides is higher than other 3 types.At last,the research results have a certain reference meaning for wading old landslides prevention in Three Gorges Reservoir Area.关键词
三峡库区/老滑坡/滑动面形态/库水位变化/响应规律Key words
Three Gorges reservoir area/Old landslides/Slip-surface shapes/Reservoir water level fluctuation/Deformation response分类
天文与地球科学引用本文复制引用
李松林,许强,汤明高,钱灵杰,任俊谦..库水位升降作用下不同滑面形态老滑坡响应规律[J].工程地质学报,2017,25(3):841-852,12.基金项目
国家杰出青年科学基金(41225011),地质灾害防治与地质环境保护国家重点实验室开放基金项目(SKLGP20152008)资助. （41225011）
