Stability Evaluation Of Bank Slopes In Fengjie

The bank slopes refers to the periodic fluctuation of the water level such that the coverage area is periodically exposed to the water surface.After the dam is stored in Fengjie County of the Three Gorges Reservoir,geological disasters in the area occur frequently.At present,China's understanding and research on landslide areas is not enough.The comprehensive survey of the volatility belt in Fengjie County of Chongqing completed the analysis of the spatial characteristics of geological changes in Fengjie County,which not only protected the geological environment of the reservoir,prevented geological disasters,and provided basic data and reference information,but also relates to the operational safety of the Chongqing Yangtze River Channel.And the property safety of the people in the reservoir area.This paper systematically classifies the types of bank slopes in the Fengjie section of the Fengjie section,and determines the background of geological disasters and the spatial distribution of newly discovered reservoir geological disasters after reservoir storage.The article summarizes the three topographical changes in the Fengjie County Reservoir in the Three Gorges Reservoir Area,namely collapse type,erosion-erosion type,overall sliding type or combined mode.As basic data,the intensity of the topographical variation of the flood control area in the fallow area was evaluated.According to the results of the on-site investigation and the results of remote sensing surveys,the landing area of Fengjie County in the Three Gorges reservoir area may vary depending on the type of bank slope.It is divided into 157 parts with a total length of about 170 km and a total area of about 8.029km~2.It contains 71 sections of rocky bank slope,with a length of 59.89 km and an area of 2.593km~2;47 sections of rocky soil bank slope with an area of 1.203km~2 and a length of 24.62km;and artificial bank slope(total number of port engineering and bank slope treatment projects),20 segments,length 4.91 km,area 1.098km~2;19 sections of soil bank slope,area 3.135km~2,length 59.14 m.The above four bank slopes accounted for 35.23%,14.48%,2.89% and 34.79% of Fengjie County,respectively,accounting for 32.3%,14.9%,13.7% and 39.1%.The rock masses,bank types,slopes,slope directions,recent distances and geological disasters of Fengjie County in the Three Gorges reservoir area were analyzed.In the reservoir area,newly-occurring wading geological disasters are prone to occur,providing ideas for the evaluation of geological disaster areas in the vulnerable zone.Based on the results of remote sensing survey and geological environment background in the Fengjie section of the reservoir area,the law of river bank topography in the Fengjie County of the Three Gorges Reservoir Area is: the overall slip and collapse type,erosion-erosion type.Wait.According to the research on the development of bank slope erosion and geological disasters,the bank slope type is used as the evaluation unit,and the weighted calculation is used to complete the stable bank slope evaluation.It is an important planning basis for the planning and monitoring of geological disaster prevention and control in the Fengjie County area.