Study on the Horizontal Subgrade Reaction of Expressway Protective Guard Pillar

Abstract

It is quite necessary to describe the relationship between the horizontal subgrade reaction and the horizontal displacement with a simple form. This study provides the analysis of the horizontal subgrade reaction of protective guard pillar in the conflict between automobiles and protective guard pillars. Making use of the relationship between soil load and horizontal load, we can build the theory of assessment of the coefficient of horizontal subgrade reaction, and then simulate the relationship between soil and column with spring in the help of the theory. In this paper, we use Mohr-coulomb yield criterion and integrate ABAQUS finite element numerical simulations, to find that it is the difference between the greatest horizontal stress components σx and the smallest horizontal stress components σy that causes the fact that horizontal load leads to the plastic yielding of protective guard pillar and earth coupling model soil. and also, the paper provides the theoretical formula of coefficient of horizontal subgrade reaction and the ultimate bearing capacity of horizontal subgrade reaction, then build the theoretical model of coefficient of horizontal subgrade reaction when soil is under the action of horizontal force, to offer design and analysis reference for practical projects.