海底管道海上接收井围堰设计研究

Study on Cofferdam Design of Offshore Receiving Well for Submarine Pipeline

管道陆海衔接是达标尾水深海排放工程设计中的一项重难点。以徐圩新区达标尾水排海工程为例,顶管段管道与铺管段管道需要在堤外海上完成衔接施工,衔接施工受到风浪及潮位影响,堤外滩涂沉积了深厚的淤泥层。此外,衔接点周边存在防波堤、海堤及渔业养殖区等保护要求较高的建构筑物,海上施工不利因素较多,施工难度大。本文介绍了海上接收井围堰施工的关键技术,分别采用公式方法和数值方法对结构强度进行对比计算,对方案合理性和可靠性进行论证。其成果可为类似工程提供借鉴。

The connection of pipelines between land and sea is a major difficulty in the design of deep-sea discharge engineering of up-to-standard tail water. Taking Xuwei New Area Up-to-standard Tail Water Discharge Project as an example, the connection construction of the pipe jacking section and the pipe laying section needs to be completed at sea outside the embankment. The connection construction is affected by wind, waves and tide levels, and a deep silt layer is deposited on the beach outside the embankment. In addition, there are structures with the high protection requirements such as breakwaters,seawalls and fishery breeding areas around the connection points. There are many unfavorable factors in offshore construction and the construction is difficult. The key technologies of the cofferdam construction of the offshore receiving well are introduced. The structural strengths are compared and calculated respectively by using the formula method and the numerical method, and the rationality and reliability of the scheme are demonstrated, which provide the reference for the similar projects.