In the numerical simulation of earth-rock dam

accurate and reliable mechanical parameters of dam material are the important basis for dam deformation prediction and dam safety evaluation. Based on the monitored deformation data of Luding core wall rockfill dam

the rheological parameters of rockfill and core wall materials are inversed in this paper. Combined with the actual filling and impoundment process of the dam

the numerical simulation is carried out

and the stress

deformation and differential settlement of the dam after completion and impoundment are analyzed. The results show that the obtained stress and deformation of the dam based on the inversed parameters are in good agreement with the actual situation

and the settlement and principal stress of the dam at the completion and during the impoundment period are within the allowable range. At the completion

the deformation inclination of the dam crest is less than 1%. During the impoundment period

the deformation inclination of the dam crest area increases due to the wetting deformation of the upstream rockfill material. Moreover

the deformation inclination of the dam crest axis is larger than that of the upstream and downstream sides

and the deformation inclination of the dam crest at the middle of the valley is the largest

but it does not exceed 3%

that means there would be no longitudinal cracks

which is consistent with the actual situation. The research results can well predict the stress

deformation and crack of the dam body

which provides important support for dam safety evaluation.