随着滩海油田海上石油开发的不断发展，滩海陆岸的设施日益增多，由于滩海处于海洋与陆地过渡带的特殊地理环境，在滩海地区进行工程建设，必须对海洋环境动力特征进行深入研究；另外滩海构筑物的建设导致海域周围潮流场变化，影响构筑物周边泥沙的运移，因此开展滩海构筑物与海洋环境相互作用的研究对滩海工程开发建设具有重要意义。基于水动力-生态耦合模型COHERENS，修改并完善了三维水动力与悬沙耦合数值模型COHERENS-SED，并利用该模型对某滩海陆岸井台及进海路工程建设前后的潮流场和泥沙冲淤变化特征进行了模拟分析。结果表明，该数值模型可以较好地分析滩海构筑物与海洋环境的相互作用，为滩海构筑物的开发建设提供了科学依据。%With the development of offshore oil exploration,the number of offshore engi-neering is increasing. The offshore area lies in the special geographical environment of the sea and land transition zone, so it is necessary to study the dynamic characteristics of the marine environment deeply. On the other hand, the appearance of construction will affect the ma-rine dynamic environment, the flow distribution and silt migration around the engineering, so it’s important to study the interaction between offshore construction and marine environ-ment. In this paper, on the basis of COHERENS modal, a three-dimensional modal named COHERENS-SED is developed. Taken a platform and sea route as an example, by building up calculation modal of tide variation in engineering sea area,the tidal current distri-bution and sediment scouring and deposition characteristic before and after the construction of the platform were analyzed. The results of numerical calculation analysis show that the new three-dimensional modal works well on analyzing the interaction between tidal current distri-bution and the offshore engineering, and it could provide a scientific basis for the develop-ment of offshore construction.
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