Abstract：
Nishihara model can describe the creep properties of soil, by deducing the west of the original are the unloading creep and creep constitutive equation and creep constitutive model is programmed by C++ language, adopt the method of numerical simulation analysis of the foundation pit excavation is completed pillar uplift law of pile under different excavation width, found that the narrower the pillar pile foundation pit uplift rate and lower uplift quantity, and studies the pillar pile uplift and lateral supporting security, the relationship between the axial force of find the shorter the length of the support provided by the strut axial forces, the greater the but corresponding allowed pillar uplift pile displacement is smaller, supported by level pillar pile vertical displacement expression of ultimate bending moment occurs.
