PIANC Smart Rivers 2022

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Emergency ship lock is the first hub building in the construction of Changshan River shipping hub. Its function orientation is: participating in flood discharge in flood season and shipping in dry season. It can effectively solve the layout conflict between flood discharge buildings and shipping projects in the existing flood channel. The emergency ship lock is composed of upper lock head, lock chamber and lower lock head, and the internal shape of the lock is complex. There is no research result on discharge capacity for reference., so the emergency ship lock should first study its discharge capacity characteristics, which is directly related to the flood safety of the river in flood season. In this paper, a cross-section model of emergency ship lock with a geometric scale of 1:30 is established based on a shipping hub in Changshan River. Combined with the existing overall model test data, the discharge capacity and its influencing factors of emergency ship lock are studied, especially the influence of lateral shrinkage and submergence coefficient of emergency ship lock. Through dimensional analysis and multi-parameter optimization, combined with the model test results, the recommended formula of emergency ship lock flow coefficient is given, and the error calculation formula of emergency ship lock flow or water level under different flooding degrees is obtained. The results show that when the upstream water head is small, the discharge increment of emergency ship lock is obvious, and with the increase of upstream water head, the discharge increment of emergency ship lock decreases gradually.

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