Calculation method of thrust force on the flexible double row long-short piles

Double row long-short piles are new type of pile foundations, which can make up for the deficiency of common double-row piles and shows a good potential of engineering application. It is important to study the calculation method of landslide thrust. Based on the model of Winkler elastic foundation beam, considering the deformation coordination between the loading segment and anchoring segment and limit equilibrium condition, calculation method of the landslide thrust of the flexible pile is derived. Distribution form of landslide thrust behind the pile is trapezoidal. Comparing the theoretical calculation results and the monitoring data of model test, it is found that the error of the landslide thrust calculation value of rear-row pile is 7% to the experimental results, and the error of fore-row pile is 14.4%. Therefore, it is proved that the calculation method of landslide thrust of the double row long-short piles are feasible.