Analysis of the Impact of Large Steel Cofferdam Structures on the Waterway and its Own Stability
To ensure the safety of the surrounding waterway passageand bridge construction,the influence of different steel cofferdam structures on the surrounding water velocity and the stability of the steel cofferdam structure itself were investigated.On the basis of ellipticity theory and Fluent finite element software,the second-order upwind algorithm was used to analyze the influence of large steel cofferdam structures on the waterway and their stability in water current.The study concluded that a steel weir with a relative ellipticity of α=1 has the least effect on the water flow around the weir and the least effect on the navigation of the surrounding vessels.At α=0.33,the steel cofferdam produces neither trailing Karman vortex street nor vortices on either side of the steel cofferdam,causing minimal impact on passing vessels as well as the bridge.The steel cofferdam with relative ellipticity α=0.33 has the least tension on both sides of the cofferdam when subjected to maximum pressure and has the best stability compared to the other three types of steel cofferdam.The above analysis has important implications for the maintenance of navigational safety in the waterway.
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