Method for calculating the uplift capacity of a circular anchor plate at arbitrary depth in sand

Abstract

Methods for calculating the uplift capacity of horizontal anchor plates have the problem of artificially distinguishing shallow and deep buried types in advance, but the classification standards differ greatly. Based on the application of digital photographic measurement technology in experiment, this paper focuses on a theoretical method for calculating the uplift capacity of horizontal anchor plate in sand at arbitrary depth without distinguishing shallow and deep burial types. The results show that the sliding surface in the soil extends to ground surface in approximately a straight oblique line at shallow burial depths, then gradually confined within the soil as a balloon shape as the burial depth increases, and further shrinks toward the anchor plate. This change of sliding surface has no absolute boundary but undergoes continuous evolution, and can be described by a morphological function of logarithmic spiral line, which is used to develop a unified mechanical model, and a theoretical method for calculating uplift capacity is deduced and established. The new mechanical model well reflects the continuous variation of the sliding surface, and comparison with other four methods on 8 experimental cases show that the new calculation method has good adaptability for different types of burial depths.