高渗透性土层对堤坝稳定性的影响分析OA

To address the issue that the coupled evolution of the seepage field,stress field,and dynamic response in dam foundations due to variations in the burial depth of high-permeability layers remains unclear,a two-dimensional finite element model of the dam body and foundation is established.Under ten different burial depth conditions of the high-permeability layer,steady-state seepage analysis,static stress analysis,equivalent-linear dynamic analysis,and slope stability analysis are carried out,and the safety factor is verified using the Morgenstern-Price method.The results indicate that variations in the burial depth of the high-permeability layer significantly affect the phreatic line,effective stress,and safety factor of the dam body,and also alter the propagation and amplifica tion characteristics of seismic waves in the foundation strata.A shallow-buried high-permeability layer further enhances pore pressure effects and localized dynamic responses,exerting adverse impacts on the static and dynamic stability of the embankment dam.The findings of this study can provide a reference for stability evaluation,critical burial depth identification,and seismic mitigation design of dam foundations containing high-permeability layers.