NUMERICAL SIMULATION FOR THE DRAINAGE HOLES IN SEEPAGE FIELD WITH DISASTER STATUS

摘要

The simplification algorithm for numerical simulation drainage holes was proposed basis on the former methods and procedure of nodal point virtual flux in order to nicely simulate action of the drainage holes in disaster. The hypothetical switch of seepage was intercalated in the overflowing type holes' exit to judge their function, the drainages holes nodes ware treated as interior nodes of global net when drainage holes ware invalidation; so it realized direct simulation the drainage holes and avoid taking the nodes as boundary nodes again. With the method, the effect of each drainage hole can be well simulated and the problem of holes with seepage free surface is solved, meanwhile, the numerical simulation of mass holes is very easy under disaster status. The correctness and practicability of this model was proved by an example.