深水吸力桩建井过程及承载力特性的试验研究  

Experimental Study on Well Construction Process and Bearing Capacity Characteristics of Deepwater Suction Pile

作　　者：刘书杰 黄熠 刘和兴 张明贺 李磊[2] 郑金龙 Liu Shujie;Huang Yi;Liu Hexing;Zhang Minghe;Li Lei;Zheng Jinlong(Zhanjiang Company of CNOOC Ltd.;College of Safety and Ocean Engineering,China University of Petroleum(Beijing))

机构地区：[1]中海石油(中国)有限公司湛江分公司 [2]中国石油大学(北京)安全与海洋工程学院

出　　处：《石油机械》2022年第3期32-41,共10页China Petroleum Machinery

基　　金：国家自然科学基金重点项目“海洋深水浅层钻井关键技术基础理论研究”(51434009);中国海洋石油集团有限公司重大科技专项“南海西部油田上产2000万m^(3)钻完井关键技术研究”(CNOOC-KJ135ZDXM38ZJ05ZJ)。

摘　　要：目前海洋工程中多为浅层吸力桩建井,相关结构设计复杂,不适合深水建井条件,为此,开展了深水吸力桩建井沉贯过程承载力特性的理论和试验研究。通过吸力桩建井过程的介绍,承载力模型的建立以及建井下入过程的模拟试验,计算和分析了吸力桩相关承载力及模拟试验结果。研究结果表明:吸力桩建井的承载力由侧向摩阻力和底部支撑力共同承担,且底部支撑力与侧向摩阻力的承载比例与吸力桩直径有关;随着外加载荷增大,吸力桩模型下入深度增加,侧向摩阻力系数先增大后减小,底部支撑系数减小;由于下入深度增加,底部支撑力占承载比例减小,比例系数降低。所得结论可为吸力桩建井施工以及后续的承载力计算提供技术指导。At present,well construction by shallow suction pile is mostly used in offshore drilling,but the relevant calculation method is complex and is not suitable for deepwater well construction conditions.Therefore,the theoretical and experimental study on the bearing capacity characteristics of deepwater suction pile in the sinking process was conducted.By means of introduction to well construction process of suction pile,establishment of bearing capacity model and simulation test of sinking process in well construction,the relevant bearing capacity of suction pile was calculated,and the simulation test results were analyzed.The study results show that the bearing capacity of suction pile in well construction is borne by lateral friction resistance and end bearing capacity,and the ratio of end bearing capacity and lateral friction is related to the suction pile diameter;as the external load increases,the setting depth of the suction pile model increases,the lateral resistance coefficient increases first and then decreases,and the end resistance coefficient decreases;due to the increase of the setting depth,the proportion of end resistance in bearing decreases,and the proportion coefficient decreases.The study conclusions provide technical guidance for the well construction of suction pile and the subsequent calculation of bearing capacity.

关 键 词：吸力桩建井 承载力模型 试验研究 下入深度 

分 类 号：TE951[石油与天然气工程—石油机械设备]