PIANC Smart Rivers 2022

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Abstract : *(250~1000 words)

When the double line water-saving ship locks operates in the mode of filling and emptying mutually, the filling water process of one lock chamber and emptying water process of the other one are carried out at the same time. On the premise that other input operating parameters of locks are the same, because the number of ships passing through the two locks may be different in one lockage, the situation of chambers waiting for each other is inevitable, which affects the operation efficiency of the two locks.

In addition, in the mode of filling and emptying mutually, the operation of the double line water-saving ship locks are coupled with each other. Compared with the mode of filling and emptying independently, the fluctuation of ship navigating speed and interval time may have a more significant impact on the operation efficiency of the ship lock, which cannot be ignored.

Combined with the condition of a planned lock on a canal in China, the throughput capacity and operation efficiency of the double line water-saving ship locks under the mode of filling and emptying mutually are studied. Based on the simulation model of double line locks which filling and emptying independently, a coupled operation simulation model of double line locks is established, in which the mode of filling and emptying mutually is adopted. The whole operation processes of the locks are simulated, under two set of ship types and proportions. Indexes such as throughput capacity, chamber occupy rate and one lockage time are collected in the model, statistic data are compared and analyzed.

The simulation results show that based on the input parameters in the model, the throughput capacity of the planned ship lock in China is reduced by 5.6% ~ 7.8%, and the one lockage time is increased by about 10.6%, when comparing the mode of filling and emptying water mutually with independently.

Besides, there is little difference in throughput capacity and other indexes of ship lock between taking mean value of speed and interval time of ships entering and leaving the lock in model and sampling randomly from a certain range. Thus using mean value of speed and interval time of ships is acceptable when doing research on the throughput capacity and operation efficiency of ship locks.
 
The achievements can provide technical support for the analysis of the throughput capacity and operation efficiency of the water-saving ship lock.

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