Unified Theoretical Approach to Ultimate Horizontal Pullout Capacity of Vertical Strip Anchor Plate in Sand

Abstract

Self-developed visual horizontal drawing strip anchor plate model test and numerical simulation experiment showed that there existed a triangular soil core before anchor plate under ultimate pulling condition, whose two bottom corner’s variation could reflect the symmetry of failure slip-line field indirectly. Along with the increasing of buried ratio, the upper bottom corner enlarged from φ to π/4 + φ/2, and the lower bottom corner reduced from π/2 to π/4 + φ/2 with the sum of two corners basically remained unchanged. In this course, the failure slip-line field before anchor plate evolved from asymmetric to symmetric gradually. Base on this knowledge, corresponding assumptions were put forward to construct the ultimate bearing mechanical model of vertical strip anchor plate under horizontal drawing, and ultimate mechanical equilibrium analysis method was used to derive the unified theoretical formula of ultimate bearing capacity at last. Calculation of four tests and comparison to other two theories indicated that unified theoretical solution had good applicability to vertical strip anchor plate in sand.