CFG桩复合地基沉降影响因素分析.pdf

Journal 工程地质学报 ofEngineeringGedogy CFG桩复合地基沉降影响因素分析‘ 万林海①②郭平业①金海元① (03华北水利水电学院岩土工程系郑州450008) (②北京科技大学土木与环境工程学院北京100083) Gravel 摘要影响CFG桩(CementFly-ash 层、荷载、桩长、桩土模量比，置换率、桩周土和桩端土模量比以及桩群等影响沉降的因素进行了系统的分析，分析了这些因素 与沉降的内在联系，得到减小复合地基沉降的方法和措施，对实际工程优化设计有一定的借鉴作用。 关键词CFG桩复合地基有限差分(FLAC一3D)沉降变形 中豳分类号：U416．1文献标识码：A FINITEDⅡ?FERENCEANALYSIS0FRELATIoNSBETWEENDESIGNPA- RAMETERSANDSETTLEMENToFCFGPⅡ。ECoMpOSITE TIoN WANLinhai①⑦GUO Pingye①JINHaiyuan① China Water and Imt泐e ((童)North of ConservancyHydroelectricPower，Zhengzhou450008) andEnvironmental Scienceand (②Civil Engineering TechnologyBeijing，Beijing100083) School，Unwersityof Abstract deformationofCFG foundation．Inthis Thereare factors settlementand pilecomposite many affecting theuseofthefinitedifference FLAC一3 factorsare analysis D，these analyzed paper，with package the of ratioof and ra- includingcushioninglayer-load-lengthpile，moduluspile soil-replacementratio，modulus tioofthesoilaroundthe andthesoilunderthe andSOon．The betweensettle- pile piletip，pilegroup relationship mentandthosefactorsare themethodsormeasurementsof setflementare is discussed，and reducing suggested．It ausefulreferenceforthe design． practicalengineeringoptimization words CFG Key pilecompositefoundation，Finitedifference(FLAC一3D)，Design-Setdement 荷载的作用，根据增强体的方向不同可分为水平向 1 引 言 和竖向增强体两种，竖向增强体习惯上称之为桩。 Gravel