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时间:2019-06-01
《一类双排桩支护结构内力计算》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据第31卷增1岩石力学与工程学报vol-31Supp.12012年5月ChineseJournalofRockMechanicsandEngineeringMay_,2012一类双排桩支护结构内力计算范秋雁1许胜才2,崔峰3(1.广西大学资源与冶金学院.广西南宁530004:2.广西大学土木建筑工程学院,广西南宁5300043.广西基础勘察工程有限责任公司,广西南宁530023)蕾要。由于支护空间受到限制等原因,一类双排桩支护型式设计为前后排桩之间没有土体。形成只有后排桩挡土的空间门架式结构,国内外目前尚无此类双排桩支护结构内力计算方法。针对这类双排桩,把前后排桩看作是竖放的
2、弹性地基梁,用土弹簧模拟基坑开挖面以下的土抗力,根据弹性地基粱的挠曲微分方程对双排桩进行分段,建立各自的内力方程。利用幂级数法结合桩端边界条件求出开挖面以下桩身的内力及变形,然后由连系梁中间截面的变形协调条件,建立力法方程,求解出连系梁中间截面的内力,进而求出前后排桩各截面的内力。结合工程实例对这一类型式的双排桩支护结构进行计算并与实测值作对比分析,提出对这一类双排桩支护结构设计有参考价值的建议。关t词t桩基础;双排桩:弹性地基梁;内力计算;幂级数法中圈分类号lTU473.1文l-t标识码lA文章编号:1000—6915(2012)增l一3152一07CALCULATIONFoRA
3、TYPEOFRETAININGSTRUCTUREWITHDOUBLE.ROWPILESFANQiuyanl,xuShengcai2,CUIFen93(1.CollegeofResourcesandMetallurgy,GuangxiUniversity,Nanning,Guangxi530004,China:2.CollegeofCivilEngineeringandArchitecture,GuangxiUniversity,Nanning,Guangxi530004,China:3.GuangxiFoundationInvestigationEngineeringCo.,Ltd
4、.,Nanning,Guangxi530023,China)Abstract:Forthereasonthattheretainingspacesuffersfromtherestraint,atypeofretainingstructurewithdouble·rowpilesisdesignedasthestructurewithoutsoilsolumbetweenthepre-rowpileandpost-rowpile,toformthesoil.retainingspatialdoor-flamestructureinthepost.rowpile.Atpresent,
5、thereiSnocalculationmethodforinternalforceofsuchkindofretainingstructurewithdouble-rowpiles.Forthistypeofdouble—rowpiles,thepre—rowpileandthepost—rOWpilearebothconsideredaselasticfoundationbeamplacingupright.nesoilspringisemployedtosimulatethesoilresistanceunderexcavationsurface.Thesectionsofd
6、ouble—rowpilearedividedonthebasisofdifferentialequationsofelasticfoundationbeamdeflectiontoestablishinternalforceequationsofsections.ThepowerseriesmethodiSusedtodeterminetheinternalforceanddeformationoftllepilebodybelowtheexcavationsurfacewiththeboun血,'yconditionofpiletip.Underthedeformationco
7、mpatibilityconditionofmiddlesectionofcouplingbeam,aequationofforcemethodisestablishedtogettheinternalforceofmiddlesectionofcouplingbeam:andthentheinternalforcesofdifferentsectionsofthepre-rowpileandthepost-rowpileareobtained.Finally,com
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