水土保持通报2017，Vol.37Issue(3)：97-101,5.DOI:10.13961/j.cnki.stbctb.2017.03.017
降雨入渗作用下秭归向斜核部南段斜坡稳定性评价
Slope Stability Evaluation of Southern Section of Zigui Syncline Core Under Rainfall Infiltration
摘要
Abstract
[Objective] The main stream of synclinal basin core in Zigui County of Hubei Province was selected as an case study area,and the slope stability evaluation under transient rainfall infiltration was carried out to provided scientific support for disaster prevention and mitigation projects of government departments,and to provide scientific basis for landslide hazard prediction and management.[Methods] Based on TRIGRS infinite slope stability calculation model coupled with groundwater dynamics,the data processing procedure and parameter selection methods of the slope stability evaluation tool was introduced in detail.[Results] Slope instability mainly located in the region with loose soil having medium thick or thicker layer,and medium slope,especially in the region having soil thickness of 7 to 10 m,and terrain slope ranged 20° to 30°,where were high incidence areas of slope instability.[Conclusion] Under the synergic effects of soil layer thickness and topography,short-duration but heavy rainfall can lead to the increase of pore-water pressure,where slope sliding happen easily,which was determined as landslide high risk area.The slope stability evaluation results were in good agreement with the actual distribution of landslides,and it can reflect the spatial distribution of rainfall-induced landslides to some extent.关键词
TRIGRS模型/斜坡稳定性评价/瞬态渗透模型/秭归向斜盆地Key words
TRIGRS model/slope stability evaluation/transient infiltration model/Zigui synclinal basin分类
天文与地球科学引用本文复制引用
齐信,刘广宁,黄波林,王世昌,黄长生..降雨入渗作用下秭归向斜核部南段斜坡稳定性评价[J].水土保持通报,2017,37(3):97-101,5.基金项目
国家自然科学基金项目“基于水波动力学的水库崩塌滑坡涌浪研究”(41372321) （41372321）
中国地质调查局灾害预警项目(12120114079301) （12120114079301）
水工环调查项目(DD20160257) （DD20160257）
