Abstract: It is generally known that the soil arching effect exists in soils behind the multirowed pile frames. Since the twodimensional plane analysis method might not accurately reflect the soil arching effect among between piles in landslide mitigation projects, the threedimensional finite element model for different pile spacings were established by the finite element method using ABAQUS program with parameters calibrated with laboratory test results. The possible soil arching effect influence factors, such as, magnitude of uniform distributed loads, pile spacing and row distance, are discussed. The optimized pile and frame row spacings were obtained to guide the design and construction.

Key words: Framed Pile Structure for Landslide Mitigation, Soil Arching Effect, Influence Factors, Numerical Analysis