Degree of Consolidation of Soils by Vertical Drains under Arbitrary Surcharge and Vacuum Preloading

摘要

Based on the condition of equal vertical strain, a general solution for the degree of consolidation of soils by vertical drains under both arbitrary surcharge and vacuum preloading, including instantaneous preloading, is proposed, which can take into account the well resistance and the smear effect, radial and vertical direction permeability. Furthermore, an analytical solution for the degree of consolidation under linear time-dependent loading is also presented. The feasibility of the solution is proved by 3-D finite element method. The solution shows that Carrillo's method is not directly used to calculate the degree of consolidation for soils by vertical drains under the condition of equal vertical strain.