大源渡枢纽上游引航道隔水墙布置方案模型试验

Model experiment on arrangement of navigable wall at upstream approach channel of Dayuandu junction

针对大源渡二线船闸上游的水流特点,采用整体物理模型和船模航行试验,研究大源渡上游引航道口门区水流条件、泄水闸过流能力和引航道制动段长度3个主要因素对上游引航道隔水墙布置方案的影响。试验对比3种不同长度的隔水墙布置方案的适用性,得知130 m隔水墙布置方案口门区水流条件最佳且制动段长度满足船舶制动要求;300 m隔水墙布置方案泄水闸受回流区影响最小,过流能力最佳。综合考虑规范要求和制动段长度要求,并考虑充分发挥泄水闸过流能力,选择上游引航道隔水墙130 m布置方案为推荐方案。

According to the flow feature of the upstream approach channel of the second-line shiplock in Dayuandu junction, we explore the influence of the three main factors including the navigable flow condition at the upstream entrance area of Dayuandu junction, the discharge capacity near the sluice gate lock holes and the length of braking area in the approach channel on the arrangement of the using the overall hydraulic model experiment and ship model expe navigable riment, in wall at the upstream approach channel which, the adaptability of arrangements of three lengths are compared and the conclusion is drawn that proposal of 130 m navigable wall has the best flow condition at upstream entrance area and meets the requirements of the length of braking area; the proposal of 300 m navigable wall has the least influence by the circulating flow area and the best discharge capacity of the sluice. Considering comprehensively the code stipulations and requirement of the length of the braking area, and to maximize the discharge capacity of the sluice, we choose the proposal of 130 m navigable wall as the recommended one.