QC方法提高高速公路软土地基CFG桩成桩合格率的实践研究

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中图分类号：U416 文献标志码：A 文章编号：2095-2945（2025）21-0155-04

Abstract：TheDongying-QingzhouExpresswayislocatedinthealuvial-proluvialplainareaofeasternShandong.Itis underlainbyweaksoil.Thenaturalfoundationbearingcapacitydoesnotmeetthebearingcapacityrequirementsofthe expresswaysubgrade，whichneedstobetreatedwithcementfly-ashgravelpiles（CFGpiles）compositefoundation.Thepassrate of CFG piles in the early stage of construction was 91.3% .Inorder to improve the pass rate ofCFG piles，QC activities were carriedout tofindoutthekeyreasonsafecting thepassrateof pileformation，andmeasureswere takentoimprovethem. Finally，the pass rate of CFG piles was increased to 97% ，and the quality improvement effect was significant.

Keywords： soft soil foundation; cement fly ash gravel pile; QC activity; bearing capacity;highway

东营至青州高速公路是贯穿东营市南北并与潍坊青州市北部连接的交通大动脉，也是黄河三角洲高效生态经济区和山东半岛蓝色经济区两大国家战略经济区彼此联系的交通要道，是黄河三角洲高效生态经济区和山东半岛蓝色经济区两大国家战略经济区通往北京、上海的大通道。（剩余3313字）