Considering the nonlinear changes of compressibility and permeability of soft soil around the tunnel. a two-dimensional nonlinear seepage consolidation control equation is established. which is solved by an alternating implicit difference method. and the development law of the average degree of consolidation with time under the three conditions of complete permeability. https://www.trainingmahasiswa.com/product-category/pitchers-carafes-and-teapots/