Abstract：The retaining structure of row-piles and frozen soil wall will be adopted in the south anchor deep foundation pit of south branch suspension cable of Runyang Bridge，which is 29 m deep and 69 m× 51m in plan. To solve the problem of determining the frost-heaving force in design，model test is made to study the frost-heaving force in the retaining structure of row-piles and frozen soil wall of super deep foundation pit. First，the similarity criterion of the model test was deduced according to similarity theory. Then the design and model construction are carried out. Finally，the horizontal frost-heaving stress against row-piles without pressure relief holes is 0.238 MPa，which is obtained by test firstly. And the average horizontal frost-heaving stress against row-piles with pressure relief holes is 0.133 MPa. The horizontal frost-heaving force is attenuated in the process of excavation with the maximum attenuation rate being 40 percent. The research results can provide designing basis for this kind of retaining structure.
