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那吉航运枢纽是郁江干流规划十梯级开发中的第四级,位于广西右江百色市下游38km处,是右江1000t级国家高等级航道建设的重要组成部分。坝址上游1 300 m处有一个近90°的大弯道,是影响枢纽布置和船闸引航道口门区与连接段航道通航安全的关键。为此,在枢纽布置设计上采用了半径大、连接段航道较顺应主流的方案,且将引航道口门做成喇叭口形状,保证进闸船舶有足够的视距和足够的航程调整状态进入引航道口门;为解决口门区动水与静水交界区域的流速、流态和回流问题,在分水墙上设16个透水孔,在各级流量下口门区通航水流条件均满足要求,保证了枢纽的通航安全。
The Najib hub is the fourth level in the ten-step development of the mainstream of the Yujiang River and is located at 38km downstream of Bose City, in the right bank of Guangxi. It is an important part of the construction of high class watercourses in the Youjiang 1000t class. There is a big curve of nearly 90 ° at 1 300 m upstream of the dam site, which is the key to affect the layout of the hub and the navigational safety of the port area and the connecting section of the navigation channel of the lock. To this end, the hub layout design uses a large radius, the connecting section of the channel more responsive to the mainstream program, and the pilot mouth made of flared mouth shape to ensure that the gate into the ship have enough line of sight and sufficient range adjustment state into the pilot In order to solve the problem of the flow velocity, flow pattern and backflow in the boundary area between the moving water and the still water in the mouth area, 16 water holes are arranged on the water dividing wall, and the traffic conditions at the door area meet the requirements Navigational safety of the hub.