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首页> 外文期刊>International Journal of Offshore and Polar Engineering >Full-scale Test of Uplift Resistance of Trenched Pipes
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Full-scale Test of Uplift Resistance of Trenched Pipes

机译：沟槽管的抗拔力全尺寸试验

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摘要

Trenching is a frequently used method for protection of offshore pipelines against dropped objects and fishery activities. To provide additional protection the trenches are usually back-filled. The backfill material may be soft, partly remoulded clay or sand present at the seabed or sand mix and crushed rock installed after pipe lay. Offshore pipelines may experience large axial forces due to temperature expansion. As a part of the pipeline design, the buckling failure modes must be analysed. In the buckling analyses, an important parameter is the upheaval resistance from the backfill material. To verify the design of a trenched offshore pipeline in the Norwegian Trench, a full-scale test was performed by SINTEF and NTNU. The test program included measurement of uplift resistance in soft clay, sand mix and crushed rock. This paper presents the test setup, the backfill materials and the measured uplift resistances. The measured resistances are compared with theoretical models for uplift resistance for different backfill materials. Recommendations are given regarding the uplift resistance pipes in trenches backfilled with sand mix or crushed rock.
机译：开沟是一种保护海上管线免受掉落物体和渔业活动侵害的常用方法。为了提供额外的保护，通常会回填沟槽。回填材料可以是在海底存在的柔软的，部分重塑的粘土或沙子，或在管道铺设后安装的沙子混合物和碎石。由于温度膨胀，海上管道可能会承受较大的轴向力。作为管道设计的一部分，必须分析屈曲失效模式。在屈曲分析中，一个重要的参数是回填材料的抗震性。为了验证挪威海沟中开槽的海上管道的设计，SINTEF和NTNU进行了全面测试。测试程序包括测量软黏土，沙石和碎石中的抗隆起性。本文介绍了测试设置，回填材料和测得的抗隆起力。将测得的电阻与理论模型进行比较，以了解不同回填材料的抗隆起性能。给出了有关在回填有沙子混合物或碎石的沟槽中的抗隆起管道的建议。

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