Comparison between landslide thrust force on double-row and single-row stabilizing piles

Abstract

It is significant in practical design that rationally analyzing and comparing the relationship in terms of magnitude between the sum of thrust in double-row piles and the thrust on single-row piles in large-scale landslide control project. According to the transfer coefficient method based on limit equilibrium principle, the sum of upslope thrust on double-row piles and upslope thrust on single-row piles, as well as the sum of net thrust upon double-row piles and net thrust upon single-row piles are analyzed and compared. Analysis results of practical examples show that the relationship between the sum of thrust on double-row piles and the thrust on single-row piles is closely correlated with the position of the rear piles, the ratio of resistance force in front of the piles over the thrust behind piles, and the load transfer factor of thrust between soil slices. If the rear piles are located at the resisting section of the slip surface, the sum of the upslope thrust on double-row piles is greater than the upslope thrust on single-row piles. If the entire slip surface is a plane, the sum of net thrust upon double-row piles does not exceed that on single-row piles.