A 2-DIMENSIONAL FROST-HEAVE MODEL FOR BURIED PIPELINES

The rigid-ice model of frost heave is one of the most comprehensive fr ost-heave models but is restricted to one-dimensional cases in its pre sent form. In this paper, the model is extended to two-dimensional pro blems. The complete formulation of the partial differential equations governing heat, moisture and ice transport in freezing soils is provid ed. The equations are subsequently solved using the Galerkin finite el ement method in space and the finite difference method in time. A comp uter program is developed for the two-dimensional rigid-ice model. A c ase of freezing around chilled gas pipeline is solved and the numerica l results are compared with experimental values, with good agreement b etween the two sets of results.