A new model for mechanical calculation of h-type anti-slide piles

Abstract

h-Type anti-slide piles (hTPs) have been receiving increasing attention in slope reinforcement engineering. However, most of the existing calculation methods for hTP responses exclusively consider the influence of earth pressure on the pile shaft. This study presents a new model for the hTP based on the Winkler foundation. The deformation of the back pile is taken as the constraint condition, and a calculation program for a statically indeterminate structure satisfying the pile–soil deformation coordination condition is created. An iterative method is used to address the internal force and deformation of the cantilever, loaded, and anchorage sections of the hTP. The rationality of the proposed model is verified by comparing it with previous models. A comparison of the hTP with an ordinary anti-slide pile (AP) shows that the top displacement of the hTP is 41.4 % smaller than that of the AP with an identical sectional area. Further parametric analysis reveals that increasing the pile width can considerably reduce the hTP top displacement, but the inertial moment and elastic modulus have weak influences on that displacement.