Abstract:Zhidanghe super large bridge, a control project of Yinbai line in Shaanxi Province, passes through the loess gully area, where there is a large HP15 ancient landslide, which may threaten the stability of the bridge in the long term,in order to make reasonable preventive measures, it is necessary to study the long-term creep characteristics of loess.In this paper, based on the practical problems faced by the project, the uniaxial creep tests of intact loess of HP15 landslide under different stress states and water content are carried out,based on Burgers model, single factor and double factor creep models are established,a three factor empirical creep model considering time, moisture content and stress state is established by curve fitting of experimental data,the application scope of the creep model is extended, and the expression of the creep characteristics of the experimental loess is further improved, meanwhile, the experimental basis and theoretical guidance are provided for the long-term damage prevention of the loess slope.