Abstract: Earth and rockfill dams have always played an important role in all types of dams. In the construction of high earth and rock dams, combining with actual rolling compaction conditions filling process simulation have important guiding significance for the safety construction and long-term stability of earth and rock dams. In order to simulate the filling and impounding process of earth and rock dam more precisely, the mesh size of finite element calculation should be the size of meters equal to the thickness of filling. At present, the difficulties in large-scale calculation of earth and rockfill dams include mesh subdivision, storage and parallel calculation of total stiffness matrix, and equation solving. Under the C programming framework, this paper uses the mesh refinement method to complete the grid subdivision of larger scale calculation, and the programming language, total stiffness storage and calculation, finite element equation solution and other processes of the static calculation program have been improved to complete the larger scale finite element method simulation of earth and rockfill dams. The filling process of a typical core wall rockfill dam with a height of 200 m is simulated under the mesh size of 1 m. The simulation results conform to the general rules.

Key words: high earth and rockfill dams, mesh generation, filling simulation, stiffness matrix, finite element calculation