Comparison of Soft Clay Research Based on Different Computer Constitutive Parameterization Algorithms

Soft clay is mainly composed of large kinds of silt sediment, which characterized by a large amount of natural water content and strong compressibility, meanwhile its shear strength is very low. In addition, the consolidation coefficient and permeability is very small, simultaneously with a long consolidation time and high sensitivity. The numerical analysis of foundation pit under soft soil foundation needs to focus on the deformation of soil behind the wall. Therefore, using the computer constitutive model adopted should not only consider a reasonable deformation of the wall, but also consider the reasonable deformation of soil, in the meantime, reasonably analyzed the influence of foundation pit excavation on the surrounding environment. Because of the elastic model could not simulate the active and passive soil pressure appropriately, which is not very suitable for the analysis of foundation pit engineering in sensitive environment. In this paper, based on differences computer constitutive parameterization algorithms, the boundary displacement and bottom uplift of foundation pit in soft soil area were studied and compared.