南盘江燕子石—甲完恩滩段航道治理

Waterway regulation of Yanzishi-Jiawanen rapids reach on Nanpan River

燕子石—甲完恩滩位于龙滩枢纽与平班枢纽的脱水段,现状条件下燕子石滩为一个枯水浅、中水急的险滩,而甲完恩滩则为枯水急滩,无法满足船舶通航要求。基于对滩险的成因和碍航特性的分析,确定了滩险治理思路。经物模和船模多方案优化研究提出推荐方案:燕子石分汊石质急、浅滩整治方案为主、支汊同时开挖,调整汊道分流,平顺航线、拓宽航槽;对于甲完恩滩,疏炸航槽内礁石,扩大卡口断面、拓宽缓流航道。该研究可为山区河流类似河流疑难滩险的整治提供参考。

The Yanzishi-Jiawanen rapids locate at the dehydration section of the Longtan junction and the Pingban junction. Under the current condition the Yanzishi rapids are shallow in low water and steep in normal waterlevel period , and Jiawanen rapids are steep in low water , which cannot meet the requirements of ship navigation. Based on the genetic analysis of rapids and characteristics of the navigation obstruction , the management idea of the rapids is determined.Through the study of multi-model optimization of physical model and ship model , a recommendation scheme is put forward ： the scheme of the Yanzishi rapids is that the main and the branches are excavated simultaneously to adjust the distributary channel smooth route and widen the channel.And the scheme of the Jiawanenrapids is that rocks in channel are exploded , which can expand bayonet section and broaden tranquil flow channel.The research result may serve as reference for the regulation of similar difficult rapids in mountain rivers.