舟山市小干二桥工程海洋水动力环境影响分析

为了解舟山市小干二桥建设工程对所在海域的水动力环境影响,包括工程附近海域的潮流场和泥沙场的变化。该文通过建立平面二维潮流数值模型对小干二桥的潮流场以及水动力进行分析,并对该工程区域的泥沙环境进行冲淤情况预测。结果显示,工程实施后,没有改变大范围海域的流场特征,对周边水域流场的影响主要发生在工程区附近,桥墩桩基附近流向变化较大,桥墩附近流速减弱、流向改变明显,冲淤影响仅限于工程区域附近海域,对沈家门港区和定海至沈家门航道的正常运行均不会造成大的影响。

In order to understand the influence of Xiaogan Second Bridge construction project on the hydrodynamic environment of the sea area in Zhoushan City,including the change of tidal current field and sediment field in the nearby sea area.The tidal current field and hydrodynamic force of Xiaogan Second Bridge are analyzed by establishing a two-dimensional tidal current numerical model.Meanwhile,the erosion and silting conditions of the project area are investigated.The results show that after the implementation of the project,the characteristics of flow field in a wide range of sea areas are not changed,and the impact on the flow field in surrounding waters mainly occurs near the project area.The flow direction near the pier and pile foundation changes greatly,the flow velocity near the pier weakens and the flow direction changes obviously,and the impact of scour and silting is limited to the sea area near the project area.The normal operation of Shenjiamen Port area and Dinghai-Shenjiamen waterway will not be greatly affected.