关键词: 航道工程, 采沙, 概化模型, 德感坝, 溯源冲刷

Abstract: Through the generalized model experiment of sand-gravel extraction of Degan dam in the Yangtze river, the erosion process of each level of flow was simulated, and the influence of sand mining on Degan dam river was also analyzed. The test results indicate that the navigation ability variation of the river bed, the regime and the channel caused by mining in the mountainous river is lesser, and the sand mining pit is also difficult to cause the traceability of the scour. The river course engineering is of almost no effect, so it is suitable for the establishment of sand mining point to extract sand. But the mining pit backfill quantity is far less than its yield, so the mining amount and mode should be scientifically planned, which will guide the regime to develop in the stable direction.

Key words: waterway engineering, sand-gravel extraction, generalized model, Degan dam, traceability scour