松花江依兰航电枢纽施工期通航条件研究

Navigation condition during construction period of Yilan Navigation Power Junction in Songhua River

采用正态物理模型对依兰航电枢纽下坝线施工一期春汛围堰、主围堰及施工二期通航水流条件进行试验研究。经过多方案比较,提出了经济合理的施工期通航工程措施。结果表明:施工一期春汛围堰、主围堰均壅高了上游水位,同时改变了水流流速分布。施工二期船闸及整治工程建成后,船闸试通航期上下游引航道口门区及连接段通航水流条件基本满足要求,洪水期仅下游连接段纵向水流流速偏大。

Based on normal physical model test,the spring flood cofferdam and main cofferdam in phase I of Yilan Navigation Power Junction and the navigation flow condition in phaseⅡwere studied.After comparison of many schemes,the economic and reasonable navigation measure during the construction period was proposed.The results show that upstream water level is generally raised up by the spring flood cofferdam and the main cofferdam in phase I of the junction,and the distribution of velocity is also changed.After completion of ship lock and regulation project,navigation flow conditions at the entrance of upper and lower approach channels and the connecting section during the trial navigation period can basically meet the requirement.During flood period,only the longitudinal flow velocity at the downstream connection section is too large.