Abstract：After comparison with gravity retaining wall and railway bridge，the new-style prestressed anchor sheet-pile retaining wall was selected to meet the request of laying triple-track on 40 m wide platform at rock slope of 30°. An existing 3D FEM program is improved and used to calculate the displacements，internal forces and moments of the surface pile，the displacements and stresses of the anchorage part，the earth pressures of filler，and the tension forces of anchored cabl. In comparison with other methods，such as geologic mechanics model test in laboratory，prototype observation and 2D FEM analysis，the presented calculation results seem more reasonable and can be a reference for engineering design and construction.
