岷江下游霸王滩滩险整治技术

岷江下游河段为天然航道,其具有典型的山区河流特征,碍航特性极其复杂,加之河道历年来受挖砂采石影响,航道条件严重恶化。针对该段航道中霸王滩弯、急、浅、险的碍航问题,采用平面二维水流数学模型,在碍航特性及滩险成因分析的基础上,从通航水流改善程度、挖槽稳定性以及船舶自航上滩等方面进行多组方案的比选和优化,确定较为合理的整治方案,同时提出山区河流类似滩险的整治原则、理念及对应措施。结果表明,修改方案1-1的总体整治效果较好,工程量较其他方案小,为推荐的整治方案。

Regulation technique on Bawang rapids in downstream of Minjiang River

The downstream reach of Minjiang River is a natural channel,which has typical characteristics of mountain river.The waterway deteriorates seriously because of complicated obstacle property and sand excavation in the past years.Aiming at navigation obstructing problem of the shallow,sharp,curved and dangerous of Bawang rapids,we establish a two-dimensional water mathematical model,analyze the rapids characteristics and cause of formation,and determine the rational scheme through the comparison and optimization of multiple schemes considering the improvement degree of navigation flow condition,stability of channel and hydraulic parameter of rapids abating,and propose the regulation principle,concept and corresponding measures of similar mountain river rapids.The results show that the overall stability and trenching stability of the modified scheme 1-1 are better,and the work quantity is smaller than other schemes,so it is the recommended regulation scheme.