孟洲坝枢纽二线船闸上引航道通航水流条件试验研究

Experimental research on navigable flow condition in upstream approach channel of second-lineshiplock of Mengzhouba hydro-junction

通过整体定床物理模型试验和船模通航试验,对孟洲坝枢纽二线船闸上引航道通航水流条件进行研究。结果表明:初步设计方案停泊段及口门区横向流速超标,不满足安全通航要求。采用加长隔流墙并设置透水段等措施对方案进行优化,并提出推荐方案。推荐方案下,口门区通航水流条件得到明显改善,且船模通航试验显示船舶操纵参数未超出规范限值,可满足安全通航要求。

The navigable flow condition in the upstream approach channel of the second-line shiplock of Mengzhouba hydro-junction is studied by means of overall fixed-bed model experiment and ship model navigation test.According to the results,the transverse velocity at the anchor segment and the entrance area exceeds the standard under the engineering arrangement of the original design scheme,which does not meet the specification requirements of the navigation flow condition.By extending the length of the diversion wall and setting permeable partition at the bottom of the wall,the engineering arrangement is optimized and a recommended scheme is proposed.Under the recommended scheme,the navigable flow condition at the entrance area is improved significantly,and the ship maneuvering parameters are controlled within limits of requirements.It indicates that the ships can pass through the entrance area safely.