水泥土搅拌桩复合地基的设计和施工质量检验（计算）（完整版）实用资料(可以直接使用，可编辑完整版实用资料，欢迎下载）水泥土搅拌桩复合地基的设计和施工质量检验作者:王飞,陈如海计算公式:fspk=mRaAp+(1-mfsk单桩面积m2:处理面积m2:复合地基承载力fspk=mRaAp+β(1-mfsk面积置换率m地基承载力特征值搅拌桩单桩竖向承载力特征值估算过程表复合地基承载力计算表第33卷第3期岩土力学Vol.33No.32021年3月RockandSoilMechanicsMar.2021收稿日期:2021-09-20文章编号:1000-7598(202103-0906-07旋喷群桩复合地基承载特性的数值分析安关峰,张洪彬,刘添俊(广州市市政集团,广州510060摘要:旋喷桩加固软土地基在各种地基处理工程中得到了广泛应用。对旋喷桩的研究多数集中在其施工工艺的改进上,或者针对单桩的承载特性进行研究,而对旋喷群桩的承载特性则研究不多。根据工程实际情况,采用基于MIDAS-GTS的三维有限元分析技术,通过改变旋喷群桩的布置方式、桩弹性模量、桩长、桩径、桩距等设计参数及桩-土接触面等参数对旋喷群桩复合地基承载特性的影响进行了研究。研究表明:旋喷桩加固软土地基主要减小了地表至桩底深度范围内土体的竖向沉降,对桩底下方的土体沉降基本无影响;提高旋喷桩桩径及材料强度会提高复合地基承载能力;不同旋喷桩布置方式、桩-土之间是否设置Goodman接触面单元对地基承载能力基本无影响。关键词:旋喷桩;复合地基;承载特性;三维数值分析中图分类号:TU473.1文献标识码:ANumericalanalysisofbearingcharacteristicsofcompositesubgradereinforcedbychemicalchurningpilegroupsANGuan-feng,ZHANGHong-bin,LIUTian-jun(GuangzhouMunicipalEngineeringGroup,Guangzhou510060,ChinaAbstract:Themethodofsoftsoilsubgradereinforcementwithchemicalchurningpileisusedmoreandmoreinprojectsofsubgradetreatment.Atpresent,theresearchesaboutchemicalchurningpileusuallyfocusonimprovementinconstructiontechniquesorbearingcharacteristicsofsinglepile.Butresearchaboutbearingcharacteristicsofchemicalchurningpilegroupsisnotmuch.BasedonMIDAS-GTSthree-dimensionalfiniteelementanalysis,theinfluenceofdesignparametersonbearingcharacteristicsofchemicalchurningpilegroupsisstudied.Thesedesignparametersofchemicalchurningpileincludelayout,elasticmodulus,length,diameterofpiles,anddistancebetweenpiles,theparametersofinterfacebetweenpilesandsoil.Theresultsshowthattheverticalsettlementofsoilwithintherangebetweensurfaceandpilebottomisreducedinsoftsoilsubgradereinforcedbychemicalchurningpiles;butthemethodhaslittleeffectontheverticalsettlementofsoilunderpilebottom.Largerpilediameterandhighermaterialstrengthcanimprovethebearingcapacityofcompositesubgrade.ButdifferentlayoutsofchemicalchurningpilesandwhethertosetupGoodmaninterfaceelementhavelittleinfluenceonbearingcapacityofcompositesubgrade.Keywords:chemic