CALCULATION MODEL OF DOUBLE-ROW STABILIZING PILES BASED ON DISPLACEMENT OF SOIL AROUND PILES

Soil displacement around the sliding mass is assumed to be uniformly distributed along the depth of sliding mass and the stabilizing pile is assumed to be elastic foundation beam.Based on the closed-form solution of single-row stabilizing pile under the action of lateral soil displacement around the pile,a theoretical model of double-row stabilizing piles is built by introducing static equilibrium and deformation compatibility conditions of the connecting beam.The shadow effect between double-row stabilizing piles is considered by defining ratio of soil displacement around the rear stabilizing pile to that around the front stabilizing pile.Solving process of the theoretical model is realized by writing programme in Matlab software.A simplified numerical model in FLAC3D platform is established to validate the result from theoretical model.The results show that the internal forces calculated from the numerical model and theoretical model are consistent to each other.The suitable range of the theoretical model is discussed.It is found that the result of the theoretical model is more accurate;and the error of calculating results between the numerical and theoretical models changes larger as the distance between the front and back stabilizing piles increases.