Properties of soil arching between piles and reasonable distance of piles in Slope engineering

Anti-slide pile is the most commonly used and the most effective control technologies in Slope engineering. The current design theory is based on experiences not to consider soil arching effect, which made reasonable anti-slide pile spacing, is too small and cost is too high. In the paper, by the analysis of existing research results and the two arch-hinged arch optimal curves and instability arch type, the effect that optimal curve is parabolic arch or arc are analyzed to design of anti-slide pile. And author thinks that soil critical load between anti-slides piles should be anti-symmetric limit load. A design method of anti-slide pile space is given; space of piles will be determined by optimal camber span ratio, static equilibrium conditions and the intensity of most unfavorable conditions of section. This is of great value and the theoretical value to optimization theory of sliding pile and landslide disaster prevention research.