建筑施工·第45卷·第1期7桩柱一体结构环梁节点设计方法马跃强1,2于亚磊1,2富秋实1,2张健1,21.上海建工二建集团有限公司上海200090;2.上海建筑工程逆作法工程技术研究中心上海200090摘要:既有建筑增设地下空间的托换过程中,常采用的锚杆静压桩托换和一柱一桩(多桩)等方式均存在一定的制约因素,为此,提出了新型桩柱一体-环梁结构体系。桩柱一体-环梁结构体系,以低净空钻孔灌注桩施工技术为基础,将钻孔灌注桩同时作为桩基和地下室结构永久柱,解决了锚杆静压桩桩数过多、一柱一桩难以在既有结构中施工的问题。3种桩柱一体-环梁节点的界面连接形式的现场载荷试验结果表明,灌注桩-环梁节点的配筋可参考现有的钢管桩-环梁节点相关规范进行设计。基于对桩柱一体-环梁结构体系设计方法的研究成果,提出了一系列设计相关内容。关键词:桩柱一体;梁柱节点;界面连接;现场试验;设计方法中图分类号:TU765文献标志码:A文章编号:1004-1001(2023)01-0007-03DOI:10.14144/j.cnki.jzsg.2023.01.002DesignMethodofRingBeamJointofPileColumnIntegratedStructureMAYueqiang1,2YUYalei1,2FUQiushi1,2ZHANGJian1,21.ShanghaiConstructionNo.2(Group)Co.,Ltd.,Shanghai200090,China;2.ShanghaiEngineeringResearchCenterofTop-DownMethodinConstructionEngineering,Shanghai200090,ChinaAbstract:Intheunderpinningprocessofaddingundergroundspacetoexistingbuildings,therearecertainconstraintsinthecommonlyusedmethodsofanchorrodstaticpressurepileunderpinningandonepilepercolumn(multiplepiles).Therefore,anewpilecolumnintegratedringbeamstructuresystemisproposed.Thepilecolumnintegratedringbeamstructuralsystem,basedontheconstructiontechnologyoflowclearanceboredpile,usestheboredpileasthepermanentcolumnofpilefoundationandbasementstructureatthesametime,whichsolvestheproblemoftoomanyanchorrodstaticpressurepilesandthatitisdifficulttoconstructonepilepercolumnintheexistingstructure.Thefieldloadtestresultsofthreeinterfaceconnectionformsofpilecolumnintegratedringbeamjointsshowthatthereinforcementofcast-in-placepileringbeamjointscanbedesignedaccordingtotheexistingrelevantspecificationsforsteelpipepileringbeamjoints.Basedontheresearchresultsofthedesignmethodofthepilecolumnintegratedringbea...