乌江思林和沙沱升船机船舶超吃水可行性研究

针对乌江思林、沙沱两座升船机船舶1.6 m吃水控制标准导致载货量偏低的实际问题,开展超吃水船舶进出升船机船厢系统性的实船试验,论证船舶吃水标准提升的可行性。结果表明,船舶出厢为控制性工况,2.0 m吃水船舶正常出厢实测最大下沉量16.46 cm,富余水深大于30 cm;基于实船试验数据改进的下沉量预测公式,将船舶实际下沉量预测精度提高1倍以上;按目前2座升船机运行水位协调机制,上下游水位变化在10 cm以内,船舶最大吃水提升至2.0 m是可行的。建议在运行中按照1.8~2.0 m吃水逐步放宽控制标准。

Feasibility study on over-draught ship through Silin and Shatuo ship lifts in Wujiang River

Aiming at the practical problem that the 1. 6 m draught control standard of Silin and Shatuo ship lifts in Wujiang River leads to the low loading capacity of the ship,we conduct systematical prototype tests of the over-draught ship to enter and leave the chamber to demonstrate the feasibility of upgrading the draught standards for ships. The results show that the ship leaving the chamber is the control condition,the maximum sinkage of the ship with the draught of 2. 0 m is measured as 16. 46 cm,and the under-keel clearance is more than 30 cm. An improved prediction formula based on the actual ship’ s test data can increase the prediction accuracy of the ship’s sinkage by more than double. According to the current water level coordination mechanism of the two ship lifts,the upstream and downstream water levels change within 10 cm,and the maximum draught of the ship could be increased to 2. 0 m. It is recommended that the draught control standards could be carried out from 1. 8 m to 2. 0 m during the navigation trial period.