Motion simulation system of collapsed earth and sand and method of motion simulation of collapsed sediment

摘要

PROBLEM TO BE SOLVED: To provide a collapsed sediment motion simulation system capable of easily determining tan s and tan m and allowing an LSFLOW to be executed.SOLUTION: A collapsed sediment motion simulation system comprises: a display 3; a display processing part 8; a ground surface DEM preparation part 10; a slide face depth setting part 20; a base surface DEM preparation part 30; a stable analytic model preparation part 40; a stable analysis part 50; a c calculation part 60 (also referred to as a slide face static friction coefficient calculation part); a s-m relationship definition part 70; a s=m value selection/determination part 80; an LSFLOW execution part 90; a simulation imaging part 100; and the like. In the simulation system, a dangerous slope AKi before collapse in an area Ai to be examined is specified and a cause of collapse (rain, earthquake intensity, ground water, or the like) is given, thereby obtaining a collapse simulation image according to a valley land form.