Based on elastoplastic theory and a practical project case of prestressed anchor-cable with
reinforced slab for strengthening the retaining walls of railway subgrade shoulders, a method is
proposed to calculate the anchor-cable length under the condition that cohesion shearing stress is
non-uniformly distributed. The stability of the project is analyzed by taking the slab as a beam, and
the slabs are designed according to the stresses in the interfaces between the wall, the cement and
the reinforcement. The proposed method has been applied in engineering practice with satisfactory
outputs.