针对海上风电升压站多桶型基础在安装施工中的沉贯阻力和产生倾角后的调平过程开展了物理模型试验研究,设置了基础结构在自重沉贯到位以及吸力沉贯到筒基高度2/3两种不同的贯入深度,研究在两种不同贯入深度条件下结构倾角分别为1°、2°、3°时的调平过程,分析调平策略的适用性以及调平过程中筒基内部压强、筒基竖向位移的变化规律。试验结果表明：吸力值的准确选取是调平成功的关键,吸力值偏小时桶型基础沉贯的速度会严重下降,并形成土塞,吸力值偏大时则易产生渗透破坏,从而导致安装过程的失败;在实际调平过程中,要根据不同沉贯深度以及倾角状态,选用合适的调平策略。
Abstract
This paper conducts a physical model experimental study on the penetration resistance of the multi-bucket foundation of an offshore wind power booster station during installation and construction and the leveling process after the inclination is generated. Two different penetration depths are set for the foundation structure： the foundation structure sinks into place by its own weight and the foundation structure sinks to 2/3 of the height of the bucket by suction. The leveling process under two different penetration depths with structure inclinations of 1°, 2°, and 3° was studied, and the applicability of the leveling strategy and the changing rules of the internal pressure and vertical displacement of the barrel foundation during the leveling process were analyzed. The test results show that accurate selection of suction value is the key to successful leveling. If the suction value is too small, the penetration rate of the bucket foundation will be seriously reduced and a soil plug will be formed. If the suction value is too large, seepage failure will easily occur, leading to failure of the installation process. In the actual leveling process, it is necessary to select appropriate leveling strategies according to different penetration depths and inclination states.
关键词
海上风力机 /
升压站 /
桩土耦合作用 /
贯入深度
Key words
offshore wind turbines /
booster /
pile-soil interaction /
penetration depth
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基金
中海石油（中国）有限公司科研项目“南海西部油田上产2000万方钻完井关键技术研究”（CNOOC-KJ 135 ZDXM 38 ZJ 05 ZJ）
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