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濛里枢纽原有航道等级偏低,不满足目前货运增长的要求,因此需要对原有船闸进行扩建来提高航运能力,将在一线船闸右岸新建二线船闸。为保证一、二线船闸口门区有利于通航的良好水流条件,建立了整体定床物理模型,研究引航道导墙长度及布置形式对口门区及引航道内水流条件的影响。模型试验结果表明,在所有修改方案中,修改方案Ⅱ(一、二线船闸分开布置,二线船闸外导墙375 m,堤头段开孔)较好,其一线船闸上引航道通航条件基本不变,二线船闸口门区通航水流条件较好,较好地改善了上游口门区及连接段的斜流、回流等不利流态。
The existing waterway level of the Mongolian hub is too low to meet the current demand for freight growth. Therefore, the original ship lock needs to be expanded to improve the shipping capacity. A second-line ship lock will be built on the right bank of the first-line lock. In order to ensure the favorable flow conditions for the navigation of the first and second ship lock gates, a physical model of the overall fixed bed was established to study the influence of the length and layout of the guide wall of the guide channel on the water flow conditions in the port area and the approach channel. The results of the model test show that in all the modification schemes, it is better to modify scheme II (the first and second line locks are arranged separately and the outer guide wall of the second line lock is 375 m and the opening of the embankment section is good). The navigation conditions of the first line lock , The condition of navigable water flow in the second-line ship lock gate area is better, and the unfavorable flow regimes such as diagonal flow and backflow of the upstream port area and connecting section are well improved.