Stress Analysis of Shallow Sea Gas Pipelines

Submarine gas pipelines usually operate in complicated and changeable regional environments and can generate corresponding stresses and displacement under the influence of internal pressures, earthquakes, waves, and other loadings. An unevenly-distributed stress will lead to shallow sea gas pipeline failure easily. Therefore, it is necessary to research the stress conditions of the shallow sea gas pipeline and check whether it can meet the safety requirements or not. In this paper, we analyze the stress conditions of shallow sea gas pipelines of two laying modes in XX areas using stress analysis software CAESAR II, discuss the loading conditions under the operating condition, and determine the position of the key point where pipeline damage is most likely to happen, the bend pipe. We concluded that the underground method and above the sea-bed method are safe. Our research provides a theoretical basis for the construction of shallow sea gas pipelines and has very important research significance and engineering value.