海上自升式钻井平台新型筒型桩靴承载力

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1、石油勘探与开发2Ol1年4月PETR0LEUMEXPLORATI()NANDDEVEL()PMENTVo1．38No．2237文章编号：1000—0747(2011)020237—06海上自升式钻井平台新型筒型桩靴承载力张浦阳，丁红岩(1．天津大学建筑工程学院；2．天津大学滨海土木工程结构与安全教育部重点实验室)摘要：为了比较筒型桩靴和传统典型桩靴装配平台的不同受力性能，详细分析不同桩靴型式对于桩腿刚性度和平台整体承载能力的影响。通过Swipe和固定位移比的加载方法，绘制了复合加载模式下筒型桩靴和

2、传统桩靴基础的垂向荷载一水平荷载、垂向荷载一弯矩荷载、垂向荷载一水平荷载弯矩荷载受力空间的破坏包络面和循环荷载条件下2种桩靴基础的垂向静荷载一垂向循环极限荷载、垂向静荷载一水平循环极限荷载受力空间的破坏包络面。理论研究表明，筒裙系统可以增加基础的有效埋置深度，从而提高平台基础的固定度和平台整体刚度。筒型桩靴可以把传统桩靴的水平和弯矩承载能力提高1O以上，在动荷载条件下水平承载力可以增长2O以上；在风浪流等极限风暴动荷载作用下，典型的海上自升式钻井平台在较硬黏土中使用筒型桩靴整体承载力比传统桩靴可提

3、高46。图8参26关键词：筒型桩靴；海上自升式钻井平台；承载力；数值模拟；破坏包络面中图分类号：TU411文献标识码：ABearingcapacityofthebucketspudcanfoundationforoffshorejack—updrillingplatformsZhangPuyang～．DingHongyan’(1．SchoolofCivilEngineering，TianjinUniversity，Tianjin300072，China；2．KeyLaboratoryofCoast

4、CivilStructureSafety，MinistryofEducation，TianjinUniversity，Tianjin300072，China)Abstract：Tocomparethebearingcapacitiesofthetraditionalspudcanandthebucketspudcan．theeffectsofdifferent—typespudcansontherigidityofpilelegsandtheentirebearingcapacitywereana

5、lyzedindetail．ThroughtheloadingmethodofSwipeandconstantdisplacement，thispaperplotsthespatialfailureenvelopesofthevertical—horizontalload，vertical—momentload，vertical—horizontal—momentloadofthebucketspudcanandtraditionalspudcanunderthemodeofcompositelo

6、ading，aswellasthespatialfailureenvelopesoftheverticalstaticload—verticalcyclinglimitload．verticalstaticload—horizontalcyclinglimitloadbasedonthesetWOspudcansunderthemodeofcyclingloading．Theoreticalstudyshowedthattheskirtsystemofbucketspudcancanincreas

7、etheeffectiveembeddeddepth，consequentlyimprovingthefoundationrigidityandentirestiffnessofajack—updrillingplatform．Itisfoundthatthebearingcapacityofthehorizontalloadandmomentloadofthenewspudcanisincreasedbyatleast10thanthatofthetraditionalspudcan，espec

8、iallythehorizontalloadbeinguptO20inthedyanmicloadcondition．Undertheactionoflimitstormloadingconditionincludingwind，waveandflowloads，theentirebearingcapacityofthejackupriginstiffclayisincreasedbyabout46withthebucketspudcanfoundationcomparedtoth