地基与基础建筑技术开发·154·FoundationandBasementBuildingTechnologyDevelopment第50卷第2期2023年2月基于CFG桩复合地基的软基处理应用研究蒙核量1，张淑芳2（1.武汉市测绘研究院，武汉430022；2.武汉市洪山区市政工程监督管理站，武汉430074）［摘要］通过对CFG桩复合地基在软土路基中的应用进行研究，能够为CFG桩在高速公路不良地基改良的可行性提供一定的理论依据。以某地高速公路软土路基为对象，通过设计离心模型试验，对不做处理的软土路基以及CFG桩加固后的软土路基的水平位移、沉降量进行研究，并发现：未做处理的天然软土路基整体不稳定，沉降量较大，路基容易受到破坏，而通过CFG桩加固后的软土路基沉降量能够控制在要求范围内，CFG桩对路基的沉降有约束作用；天然路基随深度的增大，下层的水平位移较大，路基整体稳定性较差；CFG桩加固后的软土路基对路基水平位移能够有效控制，随深度的增加，水平位移得到明显控制，表明CFG桩对路基的水平位移也有较大的约束作用。［关键词］CFG桩；软基处理；水平位移；沉降量［中图分类号］U445.7［文献标志码］B［文章编号］1001-523X(2023)02-0154-03RESEARCHONAPPLICATIONOFSOFTFOUNDATIONTREATMENTBASEDONCFGPILECOMPOSITEFOUNDATIONMengHe-liang，ZhangShu-fang［Abstract］BystudyingtheapplicationofCFGpilecompositefoundationinsoftsoilsubgrade,itcanprovideatheoreticalbasisforthefeasibilityofCFGpileimprovementinpoorfoundationofexpressway.Thispapertakesthesoftsoilsubgradeofahighwayastheobject,andthroughthedesignofcentrifugalmodeltest,thehorizontaldisplacementandsettlementamountofthesoftsoilsubgradewithouttreatmentandthesoftsoilsubgradereinforcedbyCFGpilesarestudied,anditisfoundthattheuntreatednaturalsoftsoilsubgradeisunstableasawhole,thesettlementamountislarge,andthesubgradeiseasilydamaged,whilethesettlementamountofthesoftsoilsubgradereinforcedbyCFGpilescanbecontrolledwithintherequiredrange,andCFGpileshavearestrainingeffectonthesettlementofthesubgrade.Withtheincreaseofdepth,thehorizontaldisplacementofthelowerlayerislarge,andtheoverallstabilityofthesubgradeispoor.ThehorizontaldisplacementofthesubgradecanbeeffectivelycontrolledbythesoftsoilsubgradereinforcedbyCFGpiles,andthehorizontaldisplacementissignifi...
