Method Of Prestressed Anchor Antiskid Pile Design

This paper summarizes and analyzes the results of previous studies on the pile-soilinteraction and the method of prestressed anchor anti-slide pile design. For the problemsand shortcomings, this paper trys to analyze the pile-soil interaction and the coordinatingof prestressed anchor anti-slide pile in the deformation and internal force calculation. Mainachievements are reflected in the following aspects:1、By the analysis of soil arching between the piles and behind the piles in the existingliterature, this paper further analyzes the effects of the width and height of the pilecross-section on the soil arching, puts forward the concept of the soil arching between thepiles and behind piles for the sharing of the landslide thrust ratio, and on account of thisconcept and existing pile spacing calculation proposes pile spacing formula in limit state.2、By the way of finite element simulation, this paper studies the coordinationdeformation mechanism of prestressed anchor anti-slide pile, contrast with ordinarycantilevered anti-slide pile, and obtains the result that the stress state of prestressed anchoranti-slide pile is much more rational than ordinary cantilevered anti-slide pile.3、In the calculations of prestressed anchor anti-slide pile’ internal forces anddeformation, the paper proposes a simple new method based on the perturbation method inapplication of prestressed anchor anti-slide pile’ internal force and the deformationcalculation because of the inconvenience and complexity of the existing calculationmethods in the force and deformation areas, such as the look-up table method, finitedifference method and weighted residuals method.