Evaluation of the treatment effect of rear slope cutting on hydrodynamic pressure landslides:A case study

作     者：WANG Li HUANG Jun-jie CHEN Yong WANG Shi-mei FAN Zhi-hong GUO Fei LI Xiao-wei WANG Li;HUANG Jun-jie;CHEN Yong;WANG Shi-mei;FAN Zhi-hong;GUO Fei;LI Xiao-wei

作者机构：Key Laboratory of Geological Hazards on Three Gorges Reservoir Area(China Three Gorges University)Ministry of EducationYichang 443002China College of Civil Engineering&ArchitectureChina Three Gorges UniversityYichang 443002China Badong National Observation and Research Station of GeohazardsChina University of GeosciencesWuhan 430074China Central-South Institute of Metallurgical GeologyYichang 443002China 

出 版 物：《Journal of Mountain Science》 (山地科学学报（英文）)

年 卷 期：2023年第20卷第7期

页      面：1968-1983页

核心收录：

学科分类：081504[工学-水利水电工程] 081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China(No.U21A2031) Key R&D Program of Hubei Province(No.2022BAA047) China Postdoctoral Science Foundation(No.2021M701969) Open Fund of Key Laboratory of Geological Hazards on Three Gorges Reservoir Area(2022KDZ19) the Open Fund of Badong National Observation and Research Station of Geohazards(No.BNORSG-202207 No.BNORSG-202304) 

主　　题：Hydrodynamic pressure landslide Three Gorges Reservoir Slope cutting Load reduction Landslide monitoring Ancient landslides Reservoir water level fluctuation 

摘      要：After the impoundment of the Three Gorges Reservoir,some huge ancient landslides were reactivated and deformed,showing typical hydrodynamic pressure landslide *** Baishuihe landslide was a typical hydrodynamic pressure *** management department conducted slope cutting treatments from 2018 to *** evaluate the treatment effect of rear slope cutting,this study analyzed the data of the surface deformation survey and field monitoring over the past 20 years and the characteristics of the reservoir water-triggered Baishuihe landslide deformation,and calculated the seepage field,displacement field,and stability coefficient before and after landslide *** results showed that the deformation of the Baishuihe landslide was primarily related to a decrease in the reservoir water *** to the poor permeability of the landslide soil,the decrease in the reservoir water level produced a seepage force pointing to the outside of the landslide body,leading to the step deformation of the landslide *** landslide was treated by rear slope cutting,and the“stepdeformation of the landslide disappeared after *** hydrodynamic pressure caused by the change in reservoir water after cutting the slope did not ***,as the slope cutting greatly reduced the overall sliding force of the landslide,its stability was greatly ***,high stability can still be ensured under extreme rainfall after *** cutting is effective for treating hydrodynamic pressure *** study can provide effective technical support for the treatment of reservoir landslides.