建筑施工·第44卷·第12期2869双排支护桩+预应力钢管斜撑+坑内加固组合基坑支护施工技术赵成杰林乐义孙冲中建八局第一建设有限公司山东济南250100摘要:在深基坑工程中,常规的钢筋混凝土内支撑支护结构存在造价高、施工工艺复杂、安全性较差、后期破除噪声大、污染环境等不足。结合工程案例,提出双排支护桩+预应力钢管斜撑+坑内加固组合的深基坑工程支护施工技术,通过预先施加反作用力,充分发挥基坑底部土体及基础的自承能力,支护结构安全性高,实现变形的及时有效控制,节省了施工成本,保证了施工质量及安全,应用前景广阔,值得推广使用。关键词:双排支护桩;预应力钢管斜撑;坑内加固;深基坑支护中图分类号:TU753文献标志码:A文章编号:1004-1001(2022)12-2869-03DOI:10.14144/j.cnki.jzsg.2022.12.017ConstructionTechnologyofDoubleRowSupportingPiles+PrestressedSteelPipeInclinedSupport+PitReinforcementCombinedFoundationPitSupportZHAOChengjieLINLeyiSUNChongTheFirstCompanyofChinaEighthEngineeringBureauLtd.,Ji'nan,Shandong250100,ChinaAbstract:Inthedeepfoundationpitproject,theconventionalreinforcedconcreteinternalsupportstructurehasmanyshortcomings,suchashighcost,complexconstructiontechnology,poorsafety,highnoiseandenvironmentalpollution.Combinedwithaprojectcase,thesupportingconstructiontechnologyofdeepfoundationpitengineeringcombinedwithdoublerowsupportingpiles,prestressedsteelpipediagonalbraceandfoundationpitreinforcementisproposed.Theselfbearingcapacityofthesoilandfoundationatthebottomofthefoundationpitcanbefullyexertedbypre-applyingthereactionforce.Thesupportingstructurewithhighsafetycanrealizetimelyandeffectivecontrolofdeformation.Itsavestheconstructioncost,ensurestheconstructionqualityandsafety,hasbroadapplicationprospects,andisworthyofpopularization.Keywords:doublerowsupportingpiles;prestressedsteelpipediagonalbrace;foundationpitreinforcement;foundationpitsupport1项目工程概况东营市传染病医院、市中医院、市精神卫生中心建设项目,由市传染病医院、市中医院、市精神卫生中心、行政办公楼、报告厅5个单体组成,工程地址位于东营市东营区。市中医院受现有病房楼及门诊楼继续使用的制约,分东西两期实施。先实施的东半部分为...