三峡—葛洲坝两坝间河段通航技术研究

On Navigational Technology Between Three Gorges Dam and Gezhouba Dam

三峡—葛洲坝两坝间河段是川江船舶航行最困难的航段之一,葛洲坝建成后,当川江流量大于2万m3/s,两坝间洪水急流滩相继出现,航行条件逐渐变差。各主要滩段均不能满足万吨级船队的通航要求。因此,要提高两坝间河段通航流量,采用增加推轮推力,改善推轮操纵性能和减驳减载等措施,可将两坝间河段的通航流量级提高到4.5万m3/s,以满足万吨级船队通航要求。

The reach between Three Gorges Dam and Gezhouba Dam is the part most difficult for shipping in Chuanjiang River. After Gezhouba was built, the navigational condition was better at a discharge less than 20 000 m3/s, and became worse at a discharge of more than 20 000 m3/s, due to the appearance of flood rapids. All the primary rapids could not meet the requirements of navigation of 10 000 dwt fleet. Therefore, it is of great significance to improve the navigation discharge between the two Dams and prolong the navigation time. Taking the measures of increasing thrusting force and improving the operational performances of push tugs, as well as decreasing the number of tugs and reducing the load, the navigation discharge of the reach between the two Dams can be increased from 20 000 m3/s to 45 000 m3/s, so as to meet the needs of navigation of 10 000 dwt fleet.