沙特洼地管道连续混凝土覆盖层控制负浮力模式的应用

Application of Negative Buoyancy Control Mode for Pipe Concrete Weight Coating in Saudi Wadi Area

摘要: 长输气管道经过戈壁滩洼地时，尤其是地质条件为基岩环境，很容易受到季节性雨水天气的影响，依靠管道自身的重力，不能有效地克服水浮力和动力的影响，很难保证管道的稳定性，可能会造成漂管或上屈曲现象，给管道运营带来较大的安全隐患。本文结合沙特东南部地质条件、国际标准规范及阿美标准规范要求，阐述了输气钢管连续混凝土覆盖层的结构特点、设计要求以及施工过程控制，旨在为国内外同类项目施工提供借鉴，促进合理的管道施工，以便更好地控制管道洼地负浮力。

Abstract: It is easily affected by seasonal rainy weather when the long-distance gas pipeline passes through the wadi areas, especially bedrock environment. The gravity of the pipeline cannot overcome the influence of water buoyancy and hydrodynamic force effectively, which may be difficult to guarantee the pipeline stability and cause floating or upward buckling. Thus, it will bring greater safety risks to pipeline operations. This paper represents the structural characteristics, designing requirements and construction controlling process of pipe concrete weight coating, combined with the geological conditions in southeast Saudi Arabia, international and Saudi Aramco standards and specifications, in order to provide reference for similar domestic and overseas projects and promote reasonable pipeline construction to control the negative buoyancy in wadi areas.