PIANC Smart Rivers 2022

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Abstract : *(250~1000 words)

Discharge capacity is the primary indicator for evaluating the layout of the shipping hub. The large width of ship lock approach channel will narrow the river bed and influence the discharge capacity of sluice, especially the multi-line ship locks approach channel. Narrow river bed and large terrain fall between upstream and downstream of river beds hardly meet the design requirements under the flood conditions of up to 8000m3/s, and engineering measures optimization need to be taken.
Huangtangqiao Navigation & Hydropower Junction, an important part of the high-level waterway network in the Yangtze River Delta, is the most downstream level of the six cascade hydropower stations on the Changshan River in the upper reaches of the Qiantang River. 
The river width of Huangtangqiao Project is about 200m, and the power station protrudes to the left bank embankment and the flood channel is relatively narrow. Secondly, engineering layout is difficult due to the dense houses in vicinity of sluice upstream. Thirdly, the entrance area of lock downstream approach channel is narrow, which significantly weakens discharge capacity.
In this paper, hydraulic model with 1/80 scale is employed to optimize discharge capacity based on the layout characteristics of shipping hub on narrow channel. A plan layout scheme to meet discharge capacity is proposed by means of effective engineering measures, including moving the sluice to the right, increasing the width of sluice pore and dredging the downstream channel. It is verified that the design requirements can be met by increasing the sluice pore from the original layout of 12.0m to 14.0m, and dredging entrance area of downstream channel to 56.0m elevation. The research results can be used as a reference for relevant projects.

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