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Published in:
2021 | OriginalPaper | Chapter
Simulations of Local Scour Depth at Piers of the Ben Thuy Bridge, Nghe an Province
Author : Chien Pham Van
Published in: Proceedings of the 3rd International Conference on Sustainability in Civil Engineering
Publisher: Springer Singapore
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Abstract
This study presents a numerical model based on the one-dimensional lateral distribution method and four classic formulae that can be used to simulate local scour depth at bridge piers. In order to accurate predictions of flow velocity, gravity, bed shear stress and turbulent diffusion forces are taken into account in hydrodynamic calculations. Four formulae are implemented and applied to evaluate local scour depth at bridge piers. Ben Thuy bridge located in Nghe An province is selected as an example. The results show that the local scour depth varied between 0.80 and 8.0 m at piers of this bridge. The maximum value of the local scour depth appeared at piers in the deep region (from 415 to 675 m) of the bridge river section, while small values occurred at piers in the shallow areas. Among four selected formulae, three formulae proposed by Laratslasev (1953), Zuravlev (1978), and Nguyen and Nguyen (1982) predicted similar trend and value of the local scour depth at piers in the shallow areas.