Then,based on elastic-perfectly plastic constitutive model and Ducker-Prager yield criterion,the displacement and stability factors of the earth dam with or without seepage is analyzed by using of FEM and strength reduction principle,and the Influence of seepage to stability of.

Through research of the performance of flexible base、intensity forming principle、Choose the pavement structure layer and intensity forming principle of asphalt chip seal and adaptability after rubblization, Point out the package which the asphalt chip seal applicability and typical pavement structure in rural concrete pavement reconstruction.