Abstract:Usually,the retaining wall on the slope is constructed in the section of the half-filling and half-excavating subgrade. Nevertheless many failure cases of this type of retaining wall have been reported in recent years. Combined with a practical subgrade construction project of retaining wall in one section (K59+470–K59+630) of Qixia—Laixi expressway of Shandong Province. First,a Lagrange numerical simulation is taken to analyze two main failure factors(slope angle and dynamic vehicle load) of the retaining wall on the slope;then,a double anchor constructing plan of the retaining wall is proposed;finally the concrete engineering technical parameters and method are obtained by comparison. The monitoring results indicate the stability of the retaining wall and the slope,and the success of the project means the double anchor constructing technique is feasible and applicable for similar engineering project.