关键词: 锚索桩, 预应力, 主动支护, 初始内力, 弹性地基梁, 双参数法模型, 有限差分

Abstract: In anchored anti-sliding piles engineering for landslides, when constructing of pile body completed and prestress tension loads to anchor cables were applied, sliding force did not acting on piles within a short time. In this phrase, the prestress tension loads produced a sort of active defending effect to landslide immediately, which applied a thrust force to the landslide opposite its sliding direction, and primary internal forces in piles presented. The computing of active defending force and primary internal forces is based on combining two sorts of elastic foundation beam mechanical models, including unidirectional elastic subgrade reaction in pile’s cantilever section and biparameters elastic subgrade reaction in the embedding section. The calculating method is obtained concisely by associating finite difference method of cantilever section’s deflection curve and analytical solution of embedding sections. It is helpful to evaluate the stability of landslide in the phrase of constructing emergent remedial works of anchored anti-sliding piles.

Key words: anchored anti-sliding pile, prestress tension loads, active defending effect, primary internal force, elastic foundation beam, biparameters subgrade reaction model, finite difference