Coupling Numerical Analysis Method for Primary and Secondary Consolidation of Soft Soil Foundation

Soft clay is widely distributed in our country, and this type of soil usually has the character large compressibility poor permeability, so foundation composed mainly soft prone to primary secondary consolidation coupling settlement deformation after completion construction. In paper, redefined improved time logarithmic coordinate system, calculation formula given. Then an extended unified hardening model introduced, by applying model, effect can be transformed increment equivalent stress. The numerical governing equations are established combination with seepage theory. Thus analysis realized. By means a finite element case verification subgrade construction post-construction deformation, it found that effective accomplished smoothly based on meanwhile permeability coefficient parameters able effectively control foundation. research valuable develope prediction method improve accuracy engineering, great significance solve complex geotechnical engineering problems.