钱塘江中上游山区河流挖入式港池布置及进出港通航水流条件

钱塘江中上游山区河流岸线资源有限,为提高岸线利用率,拟布置挖入式港池。针对河道流量大、流速快、港池口门通航水流条件差等问题,通过物理模型及船模试验,对山区河流挖入式港池的布置和通航水流条件进行研究。结果表明,从通航角度考虑,港池轴线与水流方向的夹角宜尽可能小,港池内制动段最大回流流速不宜超过0. 40 ms,口门区内的最大回流流速不宜超过0. 50 ms,最大横向流速不宜超过0. 80 ms。

Arrangement and navigable flow condition of excavated harbor basin in middle and upper reaches of Qiantang mountainous rivers

In order to improve the utilization rate of the shoreline,we propose to arrange the excavated harbor basin due to the lack of shoreline resources in the middle and upper reaches of Qiantang mountainous rivers.In view of the problems of large discharge,fast velocity and poor navigation flow conditions at the entrance of the excavated harbor basin,we study its layout and navigation flow conditions by means of the physical model and ship model tests.The results show that the angle between the axis of the harbor basin and the flow direction should be as small as possible from the navigation aspect.Maximum back flow velocity for the safe navigation of ships into the harbor basin is about 0.4 m/s at the brake section of the harbor basin and 0.5 m/s at the entrance area.The transverse velocity at the entrance area should be less than 0.8 m/s.