Research on bearing capacity of vacuum preloaded subsoil

In order to find bearing capacity of subsoil witch has been preloaded by vacuum,determining vacuum degree as spherical pressure stress acting on subsoil,and cancelled the assumption K0=1 when finding geostatic stress of subsoil.According these,using MATLAB program to find the numerical answer of subsoil bearing capacity based on mohr-coulomb criterion.This method makes up limitations which generated by in-situ tests processing,and corrects some calculating mistakes when proposes calculation formulas of subsoil bearing capacity which obtained K0≠1 by some scholars.Parameters analysis shows that the bearing capacity of vacuum preloaded subsoil is increasing when degree of consolidation increases.And the bearing capacity increases when increasing a same value of ΔK0 in a certain degree of consolidation.The bearing capacity is linear growth with increasing of K0.And the growth rate of bearing capacity approximately the same with a same increment of degree of consolidation in a certainK0.Cohesion and bearing capacity have a relationship of approximate linear.Friction angle and bearing capacity have an exponential relationship.