双层土中自升式钻井平台桩靴极限拔桩阻力计算新方法
|
摘要
基于CEL的桩靴拔桩过程有限元数值模拟分析,总结了双层土中自升式钻井平台拔桩时桩靴极限阻力的影响因素,拟合出一套新的双层土条件下自升式钻井平台桩靴极限拔桩阻力预测公式,该公式将桩靴极限拔桩阻力分解为由桩靴上表面极限拔桩阻力、桩靴下表面极限吸附力和桩靴侧面最大摩擦力等3部分相加得到。其中,桩靴上表面极限拔桩阻力计算公式考虑了桩靴面积、土层抗剪强度和硬土层厚度等关键因素,桩靴下表面极限吸附力计算公式考虑了土体固结时间、渗透系数和桩靴入泥深度等关键因素。本文所提出的双层土中自升式钻井平台桩靴极限拔桩阻力预测公式计算结果与离心机模型试验结果之间的相对误差为8.7%,验证了本文预测公式的正确性。本文研究成果可为自升式钻井平台在双层土复杂地层中拔桩时最大阻力预测提供参考。
The CEL-based finite element numerical simulation analysis has summarized the influencing factors of the ultimate spudcan uplift resistance of spudcan uplift in dual-layer soil for jack-up drilling rig and fitted a new ultimate resistance prediction formula for such operational conditions.This formula subdivides the ultimate uplift resistance of spudcan into the following three parts,i.e.,the ultimate uplift resistance on the upper surface of spudcan,the ultimate adsorption force on the lower surface of spudcan and the maximum friction on the sides of spudcan.Among them,the calculation formula for the ultimate uplift resistance on the upper surface of spudcan considers the key factors such as the spudcan area,soil layer shear strength and the hard soil layer thickness.The calculation formula for the ultimate adsorption force of the lower surface of spudcan considers the key factors like soil consolidation time,permeability coefficient and the penetrating depth of the pile.In this paper,the relative error between the ultimate uplift resistance calculation results obtained by our prediction formula and that of the centrifuge model is only 8.7%,which validates the correctness of our prediction formula.The research results in this paper can provide reference for the maximum spudcan uplift resistance prediction of jack-up drilling rig in complex formation.
The CEL-based finite element numerical simulation analysis has summarized the influencing factors of the ultimate spudcan uplift resistance of spudcan uplift in dual-layer soil for jack-up drilling rig and fitted a new ultimate resistance prediction formula for such operational conditions.This formula subdivides the ultimate uplift resistance of spudcan into the following three parts,i.e.,the ultimate uplift resistance on the upper surface of spudcan,the ultimate adsorption force on the lower surface of spudcan and the maximum friction on the sides of spudcan.Among them,the calculation formula for the ultimate uplift resistance on the upper surface of spudcan considers the key factors such as the spudcan area,soil layer shear strength and the hard soil layer thickness.The calculation formula for the ultimate adsorption force of the lower surface of spudcan considers the key factors like soil consolidation time,permeability coefficient and the penetrating depth of the pile.In this paper,the relative error between the ultimate uplift resistance calculation results obtained by our prediction formula and that of the centrifuge model is only 8.7%,which validates the correctness of our prediction formula.The research results in this paper can provide reference for the maximum spudcan uplift resistance prediction of jack-up drilling rig in complex formation.
引文
[1]汪张棠,赵建亭.自升式钻井平台在我国海洋油气勘探开发中的应用和发展[J].船舶,2008,19(1):10-15.WANG Zhangtang,ZHAO Jianting.Application and development of self-elevation platform in ocean oil and gas exploration in China[J].Ship&Boat,2008,19(1):10-15.
[2]罗宏志,蒙占彬.国内深水自升式钻井平台发展概况[J].中国海洋平台,2010,25(4):4-7.LUO Hongzhi,MENG Zhanbin.General situation of deepwater self-elevating drilling unit develop in China[J].China Offshore Platform,2010,25(4):4-7.
[3]LEUNG C,THO K K,CHOW Y,et al.Experimental and numerical studies of spudcan-pile interaction[R].OTC-23053-MS,2012.
[4]ZHOU X X,CHOW Y K,LEUNG C F.Numerical modeling of breakout process of objects lying on the seabed surface[J].Computers&Geotechnics,2008,35(5):686-702.
[5]MUGA B J.Ocean bottom breakout forces:including field test data and the development of an analytical method[R].Port Hueneme:Naval Civil Engineering Laboratory,1968.
[6]RAPOPORT V,YOUNG A.Prediction of breakout resistance for objects embedded into seafloor soil[C].Oceans'83 proceedings,San Francisco,CA,USA:IEEE Press,1983:567-572.
[7]PURWANA O A,LEUNG C F,CHOW Y K,et al.Influence of base suction on extraction of jack-up spudcans[J].Geotechnique,2005,55(10):741-753.
[8]BOUWMEESTER D,PEUCHEN J,WAL T V D,et al.Prediction of breakout forces for deepwater seafloor objects[C].Offshore Technology Conference.Houston,Texas,USA:American Petroleum Institute,2009:1-13.
[9]KOHAN O,GAUDIN C,CASSIDY M J,et al.Spudcan extraction from deep embedment in soft clay[J].Applied Ocean Research,2014,48:126-136.
[10]HOSSAIN M S,DONG X.Extraction of spudcan foundations in single and multilayer soils[J].Journal of Geotechnical&Geoenvironmental Engineering,2014,140(1):170-184.
[11]段梦兰,张爱霞,王建军,等.自升式钻井平台拔桩阻力预测的数值计算方法[J].机械强度,2010,32(6):961-966.DUAN Menglan,ZHANG Aixia,WANG Jianjun,et al.Numerical method for predicting uplift capacity of jack-up platform[J].Journal of Mechanical Strength,2010,32(6):961-966.
[12]丁红岩,乐丛欢,张浦阳.海上自升式钻井平台拔桩阶段桩靴上拔阻力的机理研究[J].天津大学学报,2011,44(4):324-330.DING Hongyan,YUE Conghuan,ZHANG Puyang.Mechanism study on spudcan uplift resistance of offshore jack-up drilling platform during the process of extraction[J].Journal of Tianjin University,2011,44(4):324-330.
[13]张爱霞,段梦兰,胡知辉.海床土体固结效应对平台拔桩吸附力的影响[J].石油机械,2012,40(4):54-57.ZHANG Aixia,DUAN Menglan,HU Zhihui.Effects of seabed soil consolidation effect on platform pile-pulling adsorption force[J].China Petroleum Machinery,2012,40(4):54-57.
[14]张海洋,初新杰,董胜.喷冲系统降低拔桩阻力有效性的试验研究[J].中国海洋大学学报(自然科学版),2015,45(3):116-121.ZHANG Haiyang,CHU Xinjie,DONG Sheng.Experimental study of water jetting system efficiency in reduction of pullout force[J].Periodical of Ocean University of China(Science Edition),2015,45(3):116-121.
[15]张宝平,金元刚,王金明,等.自升式钻井平台冲桩对拔桩阻力影响研究[J].石油矿场机械,2015,44(6):59-62.ZHANG Baoping,JIN Yuangang,WANG Jinming,et al.Re-search of jack-up drilling rig leg jetting effect on pile-pulling force[J].Oil Field Equipment,2015,44(6):59-62.
[16]高攀,段梦兰,赵良美,等.大比尺自升式平台插拔桩试验系统研制及验证[J].中国海上油气,2016,28(6):108-114.DOI:10.11935/j.issn.1673-1506.2016.06.018.GAO Pan,DUAN Menglan,ZHAO Liangmei,et al.Development and validation of a large-scale model test system for spudcan penetration and extraction[J].China Offshore Oil and Gas,2016,28(6):108-114.DOI:10.11935/j.issn.1673-1506.2016.06.018.
[17]王建宁,张灵军,张志刚.西非海上自升式钻井平台提高拔桩效率的方法与措施[J].中国海上油气,2016,28(4):132-135.DOI:10.11935/j.ISSN.1673-1506.2016.04.021.WANG Jianning,ZHANG Lingjun,ZHANG Zhigang.Measures for improving the leg-pull-out efficiency of offshore jackup drilling platforms in West Africa[J].China Offshore Oil and Gas,2016,28(4):132-135.DOI:10.11935/j.ISSN.1673-1506.2016.04.021.
[18]NOH W F.CEL:a time-dependent,two-space-dimensional,coupled eulerian-lagrangian code[J].Methods in Computational Physics,1964(3):117-179.
[2]罗宏志,蒙占彬.国内深水自升式钻井平台发展概况[J].中国海洋平台,2010,25(4):4-7.LUO Hongzhi,MENG Zhanbin.General situation of deepwater self-elevating drilling unit develop in China[J].China Offshore Platform,2010,25(4):4-7.
[3]LEUNG C,THO K K,CHOW Y,et al.Experimental and numerical studies of spudcan-pile interaction[R].OTC-23053-MS,2012.
[4]ZHOU X X,CHOW Y K,LEUNG C F.Numerical modeling of breakout process of objects lying on the seabed surface[J].Computers&Geotechnics,2008,35(5):686-702.
[5]MUGA B J.Ocean bottom breakout forces:including field test data and the development of an analytical method[R].Port Hueneme:Naval Civil Engineering Laboratory,1968.
[6]RAPOPORT V,YOUNG A.Prediction of breakout resistance for objects embedded into seafloor soil[C].Oceans'83 proceedings,San Francisco,CA,USA:IEEE Press,1983:567-572.
[7]PURWANA O A,LEUNG C F,CHOW Y K,et al.Influence of base suction on extraction of jack-up spudcans[J].Geotechnique,2005,55(10):741-753.
[8]BOUWMEESTER D,PEUCHEN J,WAL T V D,et al.Prediction of breakout forces for deepwater seafloor objects[C].Offshore Technology Conference.Houston,Texas,USA:American Petroleum Institute,2009:1-13.
[9]KOHAN O,GAUDIN C,CASSIDY M J,et al.Spudcan extraction from deep embedment in soft clay[J].Applied Ocean Research,2014,48:126-136.
[10]HOSSAIN M S,DONG X.Extraction of spudcan foundations in single and multilayer soils[J].Journal of Geotechnical&Geoenvironmental Engineering,2014,140(1):170-184.
[11]段梦兰,张爱霞,王建军,等.自升式钻井平台拔桩阻力预测的数值计算方法[J].机械强度,2010,32(6):961-966.DUAN Menglan,ZHANG Aixia,WANG Jianjun,et al.Numerical method for predicting uplift capacity of jack-up platform[J].Journal of Mechanical Strength,2010,32(6):961-966.
[12]丁红岩,乐丛欢,张浦阳.海上自升式钻井平台拔桩阶段桩靴上拔阻力的机理研究[J].天津大学学报,2011,44(4):324-330.DING Hongyan,YUE Conghuan,ZHANG Puyang.Mechanism study on spudcan uplift resistance of offshore jack-up drilling platform during the process of extraction[J].Journal of Tianjin University,2011,44(4):324-330.
[13]张爱霞,段梦兰,胡知辉.海床土体固结效应对平台拔桩吸附力的影响[J].石油机械,2012,40(4):54-57.ZHANG Aixia,DUAN Menglan,HU Zhihui.Effects of seabed soil consolidation effect on platform pile-pulling adsorption force[J].China Petroleum Machinery,2012,40(4):54-57.
[14]张海洋,初新杰,董胜.喷冲系统降低拔桩阻力有效性的试验研究[J].中国海洋大学学报(自然科学版),2015,45(3):116-121.ZHANG Haiyang,CHU Xinjie,DONG Sheng.Experimental study of water jetting system efficiency in reduction of pullout force[J].Periodical of Ocean University of China(Science Edition),2015,45(3):116-121.
[15]张宝平,金元刚,王金明,等.自升式钻井平台冲桩对拔桩阻力影响研究[J].石油矿场机械,2015,44(6):59-62.ZHANG Baoping,JIN Yuangang,WANG Jinming,et al.Re-search of jack-up drilling rig leg jetting effect on pile-pulling force[J].Oil Field Equipment,2015,44(6):59-62.
[16]高攀,段梦兰,赵良美,等.大比尺自升式平台插拔桩试验系统研制及验证[J].中国海上油气,2016,28(6):108-114.DOI:10.11935/j.issn.1673-1506.2016.06.018.GAO Pan,DUAN Menglan,ZHAO Liangmei,et al.Development and validation of a large-scale model test system for spudcan penetration and extraction[J].China Offshore Oil and Gas,2016,28(6):108-114.DOI:10.11935/j.issn.1673-1506.2016.06.018.
[17]王建宁,张灵军,张志刚.西非海上自升式钻井平台提高拔桩效率的方法与措施[J].中国海上油气,2016,28(4):132-135.DOI:10.11935/j.ISSN.1673-1506.2016.04.021.WANG Jianning,ZHANG Lingjun,ZHANG Zhigang.Measures for improving the leg-pull-out efficiency of offshore jackup drilling platforms in West Africa[J].China Offshore Oil and Gas,2016,28(4):132-135.DOI:10.11935/j.ISSN.1673-1506.2016.04.021.
[18]NOH W F.CEL:a time-dependent,two-space-dimensional,coupled eulerian-lagrangian code[J].Methods in Computational Physics,1964(3):117-179.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |