题目江苏国际商务大酒店二期配套办公楼项目支护设计交通学院院（系）城市地下空间工程专业学号____________________学生姓名________________________指导教师____________________起止日期_摘要近年来，随着城市地下空间的开发利用，全国各地出现了各种各样的基坑工程，如何安全、经济、快捷地完成这些基坑工程已经成为深基坑工程的一个重要研究方向。目前，基坑工程中采用的主要支护结构有地下连续墙、排桩+止水帷幕、重力式挡墙、土钉等，这些技术基本都是原位成孔。它们不仅工程造价大、污染环境、浪费材料、造成不良的地质问题，而且受地质情况、区域等的限制。本文在现有的双排桩和钢桩的基坑支护技术基础上，提出了新型的装配式双排钢桩支护体系，它的计算理论采用的是传统双排桩的计算理论。采用钢板桩和H型钢桩两两组合或者两者交叉组合，可以形成双排钢桩基坑支护结构。解决了传统双排桩仅在桩顶连接，下部无法连接成整体、前后排桩变形不协调等问题。具有可循环利用性、经济环保、施工便捷等优点在现代快速发展的城市地下空间中有着较好的使用前景。江苏国际商务大酒店二期配套办公楼项目基坑开挖总面积约10412m2、开挖深度6.3m左右，场地土质多为淤泥质土，考虑到钢板桩的止水性能强且可以重复使用，经济性较好，具有轻型、施工快捷等特点。因此，该基坑工程采用组合钢板桩门式桁架加挡土结构的支护体系，并进行方案的计算设计以及提出具体施工要求。关键词：深基坑；支护结构；钢板桩；H型钢；AbstractInrecentyears,withthedevelopmentandutilizationofurbanundergroundspace,thecountryappearedavarietyofexcavationworks,howsafe,economical,efficientcompletionoftheseprojectshavebecomethedeepfoundationpitengineeringisanimportantresearchdirection.Currently,thefoundationpitengineeringusedinthemainsupportingstructureofundergroundcontinuouswall,pilewaterproofcurtain,gravityretainingwall,soilnailing,etc.Thesetechniquesarebasicallyinsituintothehole.Notonlyaretheygreatprojectcost,environmentalpollution,wastematerial,adversegeologicalproblems,butalsobythegeologicalconditions,regionalandotherrestrictions.Inthispaper,theexistingdoublepilesandsteelpileexcavationtechniqueisproposedbasedonanewtypeoffabricateddoublesteelpilessupportingsystem,whichisusedinthecalculationoftheoreticalcalculationofthetraditionaltheoryofdouble-rowpiles.UseofsteelpilesandpilesH-beamcombinationoftwoorbothcrosscombinationscanformdoublesteelpilefoundationpitsupportingstructure.Solutiontothetraditionaldouble-rowpilesonlyontopofthepileconnectioncannotconnecttotheloweroverall,frontrowpilesdeformationuncoordinatedandotherissues.Withrecyclability,theeconomicenvironment,convenientconstruction,etc.Inthemodernfast-growingurbanundergroundspacehasagoodapplicationprospect.JiangsuInternationalBusinessHoteltwoofficeprojectssupportingexcavationtotalareaofabout10412m2,excavationdepthofabout6.3m,sitesoilformanysaltysoil,takingintoaccountthesteelsheetpilesealingperformanceisstrongandcanbereused,economicbetter,withalight,quickconstructionandsoon.Therefore,theuseofcombinationsofsteelsheetpilefoundationpitgantrytrussplusretainingstructuressupportingsystem,computationaldesignandconductprogramsandtoproposespecificconstructionrequirements.Keywords:Deepfoundation;Supportingstructure;Steelsheetpile;H-beam;目录摘要..........................................................................................................................................1Abstract.....................................................................................................................................II第一章绪论.............................................
