Physical simulation experiment on multi-stage revival mechanism of ancient landslide induced by rainfall
The giant landslide in the reservoir area of a proposed hydropower station on the upper Yalong River has deformed significantly in recent years,posing a serious threat to the construction and operation of the hydropower station.On the base of on-site geologic investigation and deformation analysis,different similar materials were prepared and bottom friction test was used to study the deformation mechanism and damage mode of the landslide.The rear cracks of landslide B1 area are found to form earlier than those at the front,and their scale is also larger,as indicated by the results of bottom friction tests.This is consistented with on-site investigations and interview information.Monitoring points in B1 area indicate that the degree of rear deformation is greater than that of the front,which conforms to a translational deformation pattern.However,if instability and failure occur in B1 area,it may lead to localized progressive instability and failure in the A area of the rear.Overall(A + B1 area)may evolve into a traction-type deformation failure mode.The research results of bottom friction test on the deformation and damage mode of Zhoujia landslide can provide a certain basis for the engineering management decision.
国家科技期刊平台
NSTL
万方数据
维普
