3D Current-induced Local Scour around Dumbbell-Shaped Steel Suspending Cofferdams

DUAN Lunliang; WANG Shaohua; ZHANG Qibo; ZHENG Dongsheng

doi:10.3969/j.issn.0258-2724.2018.04.006

Volume 31 Issue 4

Jul. 2018

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Journal of Southwest Jiaotong University > 2018 > 53(4): 704-711.

DUAN Lunliang, WANG Shaohua, ZHANG Qibo, ZHENG Dongsheng. 3D Current-induced Local Scour around Dumbbell-Shaped Steel Suspending Cofferdams[J]. Journal of Southwest Jiaotong University, 2018, 53(4): 704-711. doi: 10.3969/j.issn.0258-2724.2018.04.006

Citation:

DUAN Lunliang, WANG Shaohua, ZHANG Qibo, ZHENG Dongsheng. 3D Current-induced Local Scour around Dumbbell-Shaped Steel Suspending Cofferdams[J]. Journal of Southwest Jiaotong University, 2018, 53(4): 704-711. doi: 10.3969/j.issn.0258-2724.2018.04.006

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3D Current-induced Local Scour around Dumbbell-Shaped Steel Suspending Cofferdams

doi: 10.3969/j.issn.0258-2724.2018.04.006

Received Date: 12 May 2017
Publish Date: 01 Aug 2018

Abstract

Abstract

To investigate the local scour around a cofferdam, a three-dimensional numerical model for current-induced sediment scour around a dumbbell-shaped steel suspending cofferdam was established. After its validation using previous experimental data, the proposed model was applied to explore the local scour around dumbbell-shaped steel suspending cofferdams under various conditions. The numerical results indicate that the flow field distribution around the cofferdam is very complex owing to the mutual influence of the cofferdam and the steel casings. In addition, the maximum scour depth occurs around the casing adjacent to the centreline of the cofferdam, which increases with increasing current velocity and draught; the scour plain patterns are similar to the shape of the cofferdam. The results of this study can provide new evidence for studies of soil stability, and can also provide a reference for predicting the scour pattern around coastal structures.
- current velocity,
- cofferdams,
- scour,
- CFD

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References(20)

References

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