Abstract
In order to effectively prevent and control debris flow disasters, it is one of the most effective engineering measures to construct a blocking project in the valley section of the circulation section to actively reduce the flow and velocity of debris flow. The check dams is taken as a control structure to intercept the solid materials of flush flood and debris flow in the channel, which play an important role in debris flow prevention and control project. However, the huge impact force of debris flow often causes the check dam to be destroyed. Based on the theory of fluid–solid coupling, by means of structural dynamics simulation software, fluid dynamics simulation software and coupling plane data transfer software, numerical simulation of the interaction between debris flow and the check dam has been carried out. Research results indicate that (1) the overflow section is subjected to the impact of the debris flow greater than the abutment; (2) debris flow impact only has a greater impact on a certain depth of the check dam, and the impact beyond this range is less. The numerical simulation results can provide data support for the design and optimization of the check dam.
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