Three-dimensional finite element analysis of railway subgrade strengthened by lattice beams of prestress cable

Lattice beams of prestress cable can remedy effective landslide and achieve the purpose of subgrade stability. So lattice beams of prestress cable are generally adopted in the condition of the large excavation, high and steep subgrade and less geology for high speed railway in the mountains. For high subgrade finite element simulation is carried through before and after reinforcement of lattice beams of prestress cable. Finally safety factor before and after reinforcement is obtained by the finite element strength reduction method. The results show that railway subgrade reinforced by the lattice beams of prestressed cables is stable and equivalent plastic strain is very low.