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| Citation: | Cheng Yongzhou, Lu Xianhe, Li Xiaochao, Yi Lei, Hu Youchuan. The malconformation research of 3D scour below submarine pipelines under the oblique waves[J]. Haiyang Xuebao, 2016, 38(7): 126-134. doi: 10.3969/j.issn.0253-4193.2016.07.012
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Due to the seabed undulating, the slope changed the action properties of wave on pipeline and seabed necessarily and then will affect three-dimensional scouring below pipelines. For the experimental research of the three-dimensional scouring characteristics of submarine pipeline, a median particle size of 0.22 mm and the 45° angle of the slope are used by considering the effect of the oblique wave, which is based on the experimental results of the wave basins. The malconformation of pipelines three-dimensional scour is analyzed by measuring the width and depth of the scour hole in the pipeline. The experimental results show that the existence of pipeline makes the wave height on the slope to reduce; under the action of slope, the malconformation of the three-dimensional scouring characteristics of submarine pipelines is assumed by the malconformation of the depth and width, and the malconformation of the width is responsible for the sediment behind the pipeline is moved backwards. The influence of the malconformation of three-dimensional scour of the cycle is higher than the wave height. With the decrease of the water depth, scour depth is divided into slow development stage and rapid development phase when the pipelines extend from the deep sea to the seacoast.
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