提高三峡—葛洲坝两坝间通航能力试验研究

Test and research of improving navigation capacity between the Three Gorges Project and Gezhouba Project

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,当川江流量小于2万m3 s,航行条件较好;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,提高两坝间河段通航流量,延长通航期具有重要意义。采用增加推轮推力,改善推轮操纵性能和减驳减载等改进措施,可将两坝间河段的通航流量级由上水的2万m3 s提高到4.5万m3 s。

The river reach between the Three Gorges Project and Gezhouba Project is one of the most difficult navigation channel of the Chuanjiang river. After the completion of Gezhouba project, when the discharge is less than 20 000 m^3/s, the navigation condition is good; when the discharge is larger than 20 000 m^3/s, the torrential flow rapids successively emerge and the navigation conditions become worse. All the main rapid reaches cannot meet the navigation expectation of ten-thousand-tonnage fleet. For this reason, raising the navigable discharge and prolonging the navigable period are of great importance. Through the measures of increasing towboat thrust, improving manoeuvre performance of towboats and reducing barges and load of a fleet etc., the navigation capacity between the Three Gorges Project and Gezhouba Project can be upgraded to 45 000 m^3/s from 20 000 m^3/s.