Settling Mechanism for Ternary-Type Geocontainers Dumped from a Bevel
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 143, Issue 5
Abstract
Geocontainers have been increasingly used in various estuarine and coastal engineering projects. However, it is difficult to determine the horizontal settling distances of geocontainers when they are dumped into deep water. Three new types of geocontainers were proposed on the basis of a unitary geocontainer. Type-selection and parameter-screening experiments were conducted in a flume to determine the optimal type of geocontainer and its optimal parameter combination. Based on the optimal parameter combination, a regularity experiment was conducted under 25 different water depth and flow velocity conditions to determine the settling mechanism of the optimal type of geocontainer. Last, empirical formulas were proposed for evaluating the drag and lift coefficients, and the horizontal settling trajectories of the optimal type of geocontainer were calculated. The results of these experiments confirm the ternary-type geocontainer as the optimal type of geocontainer, and the standard deviation of the settling distances was smallest when the dimensions were D × B = 16 × 12 cm. The filling ratio φ was 78.54%, the sliding distance L was 5 cm, and the bevel angle α was 40°.
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Acknowledgments
This study was financed by the National Natural Science Foundation of China (Grant NNSFC-51114111) and supported by the Fundamental Research Funds for the Central Universities (Grant 2015B32614). Their support is gratefully acknowledged.
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Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 143 • Issue 5 • September 2017
Copyright
© 2017 American Society of Civil Engineers.
History
Received: Aug 1, 2016
Accepted: Feb 27, 2017
Published online: Jun 2, 2017
Published in print: Sep 1, 2017
Discussion open until: Nov 2, 2017
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