第39卷第1期2023年2月结构工程师StructuralEngineersVol.39,No.1Feb.2023左手抗浮右手减沉——抗浮车库中桩基抗拔与抗压的实践研究王欲秋1杜鹏2,*(1.济南市规划设计研究院,济南250101;2.同圆设计集团股份有限公司,济南250101)摘要地下车库采用桩基抗浮时,其受压工况的计算一直不太明确。结合工程实例,分别在单层和两层抗浮车库中,采用柱墩筏板+抗拔桩(减沉桩)的基础形式,桩基数量以抗浮工况确定,受压工况下采用减沉疏桩复合桩基的设计方式,实现以最少的桩基数量满足抗浮又能合理发挥天然土层承载力的目的,达到安全、经济、受力合理的目的。该方法是一种较为简化的设计方法,但其理论依据清晰,安全度可以满足要求。关键词抗浮,抗压,减沉疏桩基础,复合桩基,筏板基础LeftHandAnti-floating,RightHandSinking——Anti-floatingandCompressiveResistanceofPileFoundationinGarageFoundationWANGYuqiu1DUPeng2,*(1.JinanCityPlanningandDesignInstitute,Jinan250101,China;2.ShandongTongyuanDesignGroupCo.,Ltd.,Jinan250101,China)AbstractCombinedwithengineeringexamples,inthecaseofasingle-storeygarageandatwo-storeygaragerespectively,thefoundationformofraftandcolumnpierandanti-upliftpile(reducedsettlementpile)isadopted,andthenumberofanti-upliftpilesiscalculatedaccordingtotheanti-floatingrequirements;under-columncompensationpiles,fourpilesunderthecolumnareusedinthisprojecttobalancethesettlementintwodirections;themethodofinvertedbeamandgirderfloorisusedtoverifythehighwaterlevelanti-floatingrequirementsofthefoundation;thecompositefoundationmethodisusedtoverifythatthewaterlevelisbelowthefoundation;strivetoachievereasonablecalculationsforbothanti-floatingandcompressiveworkingconditions.Thismethodisarelativelysimplifiedalgorithm,butitreliesontherefinementofparameterssuchassoilcoefficientofsubgradereaction,pilestiffnesscoefficient,andcapeffectcoefficient.Keywordscompositefoundation,anti-floating,compressive,simplifiedalgorithm,raftfoundation0引言《建筑工程抗浮设计标准》(JGJ476—2019)[1]自2020年3月1日开始实施。对于抗浮等级为甲级的工程,新标准将抗浮稳定系数提高至1.1,结构上部和内部填筑体的抗浮力组合系数...