Hydrodynamic problems associated with construction of sea-crossing bridges
The hydrodynamic problems associated with the construction of the sea-crossing bridge were proposed. The first issue is the environmental impacts of the sea-crossing bridge piers on the changes of flow fields and sediment transport, which is a major factor in determining the location of the navigable opening of the Yangtze estuary bridge. Numerical and experimental results of the bridge piers on the tidal flows in the Yangtze estuary were presented by the use of the shallow water equations and physical model of the Yangtze estuary. The local structures of the complicated turbulent flows around a bottom-mounted pier and the resultant local scouring are the second issue which reserves much attention in scientific research. Based on the Reynolds averaged Navier-Stokes equations and the k-omega turbulence model, numerical results of the turbulent flows around the single pile and grouping piles were studied numerically. The third issue is the hydrodynamic loads on the piled slab pier of the sea-crossing bridges in the action of irregular wave-current combination. Based on the experimental results of the wave-current loads on each pile of the grouping piles and the slab of the Donghai bridge, the effects of grouping piles were discussed.
Key wordshydrodynamic loads local scouring environmental impact sea-crossing bridge piles
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- Liu, H., Wu, W., He, YS., et al. Studies on numerical modeling of water environment in the Yangtze estuary: numerical simulation of hydrodynamic flows, Journal of Hydrodynamics, 2000, 15(1): 17–30. (in Chinese).Google Scholar
- Chen, YM. Numerical simulation of effects of bridge piers on tidal flow in Yangtze estuary, 2002, MS. thesis, Shanghai Jiao Tong University.Google Scholar
- Whitehouse, R. Scour at marine structures. 1998, Thomas Telford Publications.Google Scholar
- Roulund, A. Three-dimensional numerical modeling of flow around a bottom-mounted pile and its application to scour. 2000, Ph.D. thesis, Technical University of Denmark.Google Scholar
- Sun, JC., He, YS., Liu, H. A new reciprocal flow experirment flume and sand scouring experiment, Chinese Quarterly of Mechanics, 2000, 21(2): 149–156. (in Chinese)Google Scholar
- Liu, HJ. Numerical Simulation of turbulent flow around a bottom-mounted vertical cylinder, 2002, MS. thesis, Shanghai Jiao Tong University. (in Chinese)Google Scholar
- Liu, H., Zhang, DL, He, YS. 2-D vertical mathematical model for the morphological processes of a trench, J. of Hydrodynamics, 1999, 11(2): 56–62.Google Scholar
- Fredsoe, J & Deigaard, R. Mechanics of coastal sediment transport. Advanced series on ocean engineering, Vol. 3, 1992, World Scientific Publishing Co.Google Scholar
- Lan, YM, Xue, LP, Liu, H, et al. Experimental studies on hydrodynamic loads on piles and slab of Donghai Bridge, Part I: hydrodynamic forces on a single pile in wave—current combinations, J. of Hydrodynamics, 2004, 19(6): 753–758. (in Chinese)Google Scholar
- Lan, YM, Liu, H, et al. Experimental studies on hydrodynamic loads on piles and slab of Donghai Bridge, Part II: hydrodynamic forces on pile array and slab in wave—current combinations, J. of Hydrodynamics, 2005, 20(3): 332–339. (in Chinese)Google Scholar