| 摘要: |
| 为解决不埋深海管道在温压荷载循环作用下，轴向移动量不断累积的问题，采用数值模拟方法，在论证了钢悬链线立管（steel catenary riser，SCR）张力相比于其他因素对管道轴向移动影响更为显著的基础上，针对一端受到SCR张力作用的短管，分析了不同轴向移动消减方案的作用特点。研究表明，对管道进行锚固能有效约束其轴向移动，且在中部锚固需要的锚固力及管道内产生的有效轴向力均较小；滑动基础可通过释放一定的管道位移量来减少管中的应力累积。因此将中部锚固与端部滑动相结合可优化锚固系统，使锚固力进一步下降54%，管中最大有效轴向压力减小33%，从而最有效地消减轴向移动。 |
| 关键词: 海底管道 轴向定向移动 钢悬链线立管张力 锚桩 滑动基础 |
| DOI：10.11759/hykx20190320002 |
| 分类号:TE58 |
| 基金项目:国家自然科学基金面上项目（51679162）；天津市自然科学基金重点项目（17JCZDJC39900） |
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| Study on deep-sea pipeline walking mitigation |
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LIU Run, HAO Xin-tong, LI Cheng-feng, PENG Bi-yao
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State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
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| Abstract: |
| To address the axial walking of non-buried deep-sea pipelines under cyclic thermal-loading and internal-pressure conditions, this study, using a numerical method, first demonstrates the influence of the steel catenary riser (SCR) tension on the pipeline walking, which is greater than the influences of other mechanisms. Then, the effects of different walking mitigation methods are presented using a pipeline model connected to the SCR. Results show that axial walking can be effectively restrained using anchor piles. In addition, the anchor force and the effective axial force are smaller when the anchor is installed at the pipeline middle. Sliding foundations can minimize the accumulative stress on the pipeline by allowing free-end movements. The combination of the sliding foundation at the pipeline end and the anchor at the middle can further reduce the anchor force by 54% and the compressive effective axial force by 33%, which will optimize the anchor system and effectively reduce the axial walking. |
| Key words: subsea pipelines axial walking steel catenary riser (SCR) tension anchor piles sliding foundation |
