川江神背嘴滩航道条件评价

Channel conditions evaluation of the Shenbeizui Shoal in Chuan River

在泸渝段航道整治工程中,开辟神背嘴滩右槽为主航槽,整治初期效果显著。针对长江上游船舶大型化、神背嘴滩十余年河床演变后的航道条件适应性问题,基于滩槽演变、浅区变化、分流比、流速比降、与船舶发展和航道规划适应性等方面对神背嘴滩航道条件进行分析评价。评价认为航槽有所回淤。鉴于各水位期均存在坡陡流急的现象,提出特殊时期扩大泄水断面、适当提高部分整治建筑物高程的维护措施。

In the waterway regulation project of Luyu section,the right channel of the Shenbeizui Shoal is dredged as the main channel with remarkable effect in the early stage of regulation.In view of the adaptability of the channel conditions after the large-scale ships in the upper reaches of the Yangtze River and the evolution of the Shenbeizui Shoal for more than ten years,the channel conditions of the Shenbeizui Shoal are analyzed and evaluated based on the evolution of the channel,the change of the shallow area,the diversion ratio,the velocity gradient,the adaptability to ship development and channel planning.According to the evaluation,there is siltation in the navigation channel.In view of the phenomenon of steep slope and rapid flow exist in each stage of water level,the maintenance measures that the discharge section should be enlarged and the elevation of some regulation buildings should be raised appropriately in special period are put forward.