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The process of constructing breakwater project is a course of dumping rockfill. And the slit is squeezed out. The simulation of dumping rockfill is mainly by Lagrange or Euler algorithm. But these two algorithms have disadvantages in the process of simulating. The course of extruding slitl is a dynamic contact process of rockfill, seawater and silt. This paper studies the basic principle of Coupled Euler Lagrange algorithms (CEL). The course of extruding slit is simulated by CEL with ABAQUS. This paper studies the course of extruding slit by dumping rockfill in the project of Haiyang harbor. The size effect of rockfill on extruding depth is put forward. The research results can be used be used for reference in other engineering.

Numerical Study on Treatment of Weak Groundsill with Method of Extruding Slit by Dumping Rockfill