何同继. 2016: 高原湖相沉积地层CFG桩复合地基施工技术及承载性状试验研究. 工程地质学报, 24(s1): 519-526. DOI: 10.13544/j.cnki.jeg.2016.s1.075
    引用本文: 何同继. 2016: 高原湖相沉积地层CFG桩复合地基施工技术及承载性状试验研究. 工程地质学报, 24(s1): 519-526. DOI: 10.13544/j.cnki.jeg.2016.s1.075
    HE Tongji. 2016: EXPERIMENTAL STUDY ON CONSTRUCTION TECHNIQUE OF CFG PILE COMPOSITE FOUNDATION AND ITS BEARING CHARACTERISTICS IN LACUSTRINE SEDIMENTARY STRATA. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 519-526. DOI: 10.13544/j.cnki.jeg.2016.s1.075
    Citation: HE Tongji. 2016: EXPERIMENTAL STUDY ON CONSTRUCTION TECHNIQUE OF CFG PILE COMPOSITE FOUNDATION AND ITS BEARING CHARACTERISTICS IN LACUSTRINE SEDIMENTARY STRATA. JOURNAL OF ENGINEERING GEOLOGY, 24(s1): 519-526. DOI: 10.13544/j.cnki.jeg.2016.s1.075

    高原湖相沉积地层CFG桩复合地基施工技术及承载性状试验研究

    EXPERIMENTAL STUDY ON CONSTRUCTION TECHNIQUE OF CFG PILE COMPOSITE FOUNDATION AND ITS BEARING CHARACTERISTICS IN LACUSTRINE SEDIMENTARY STRATA

    • 摘要: 通过现场和室内试验,研究了CFG桩复合地基的施工工艺及相关控制参数,其中CFG桩长螺旋钻机成孔、管内泵压混合料成桩工艺成桩速度快,质量好,更适用于客运专线复合地基加固处理。采用低应变反射波法、钻芯法、单桩静载荷试验及单桩复合地基载荷试验,对CFG桩体质量以及CFG桩网结构加固地基的效果进行了分析评价。研究结果表明:CFG桩复合地基加固处理客运专线软弱土地基时,能够较好地满足上部荷载所要求的承载力和设计变形值,能够较好地控制工后沉降,而且加固效果明显,承载力提高较大。研究成果对类似工程采用CFG桩法处理地基具有指导作用。

       

      Abstract: By field test and inner test, the construction technique of CFG pile foundation and control parameters relating to construction are thoroughly studied. CFG pile by long auger is proved to be more appropriate for reinforcing soft foundation of passenger special line of railway than other methods for its good quality and rapidity of pile formation. Low strain reflection method, core drilling method and load test are used not only to analyze the quality of CFG piles but also to evaluate the effects of CFG piles in reinforcing soft ground. The research results show that the way to reinforce the soft foundation of passenger special line of railway can better meet the requirement of bearing capacity and deformation value as well as better control post-construction settlement. All of the results can be used to direct the construction of CFG pie composite foundation of other similar engineering projects.

       

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