Abstract
One-dimensional consolidation theory proposed by Terzaghi is widely used for the analysis of consolidation. Seepage force is ignored in the derivation of the consolidation theory. However, flow of water through a soil mass results in seepage force being exerted on the soil. This paper addresses the influence of seepage force on consolidation and clarifies whether the seepage force can be neglected in practical engineering. The basic matrix equations for coupling analysis of seepage force and consolidation using finite elements are derived based on the principle of virtual work and Galerkin's weighted residual method. Corresponding program is coded in FORTRAN. A case is analyzed using the program for one-way drainage. The results are compared with that obtained by classic Terzaghi's one dimensional consolidation theory. It is shown that seepage force has influence on pore pressure dissipation of one dimensional consolidation. The immediate increase of the pore pressure is about 3/4 of the applied load when seepage force is considered. Because of the existence of seepage force, consolidation rate is decreased.
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