Analytic solution to soil arching effect and its application based on interaction of slope soil and piles

摘要

Rectangle piles have been widely used to stabilise problematic slopes with typically non-linearnplastic deformation behaviour. This paper introduces analytic solutions to soil arching effectnbased on the slope soil and piles interaction. In view of stress condition of the passive pilesnsubjected to the lateral force, the stress expression of arbitrary point of the soil behind the piles isnderived from soil mechanics, elastic and plastic theories, and the mechanical model of soil arch isnbuilt. Stress isoline distribution of soil arch is found to be hyperbolic, shoulder expansion arch,nsaddle and domal. After the influence factors on soil arching effect are discussed in detail, thengoverning equation of maximum pile spacing is established based on the Mohr–Coulomb theorynof soil shearing strength. Finally, a practical case of slope prevention engineering is given for thendesign of pile spacing to verify the rationality of analytic solution.