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CFG桩与褥垫层复合地基施工技术已在铁路客运专线普遍使用。它具有沉降变形小、施工简单、造价低、承载力提高幅度大以及适用范围较广、社会和经济效益明显等特点。根据武广客运专线的现场实践和学习,总结出长螺旋成孔泵送混合料施工CFG桩施工工艺和在施工过程中应重点控制的技术、质量问题及施工过程中质量监控的要点,供同类工程施工时参考。
CFG pile and cushion composite foundation construction technology has been widely used in the railway passenger dedicated line. It has the characteristics of small deformation of settlement, simple construction, low cost, large increase of bearing capacity, wide scope of application and obvious social and economic benefits. According to the site practice and study of Wuhan-Guangzhou Passenger Dedicated Line, the article summarizes the construction technology of CFG pile with long helix for pumping mixed material and the key control technology, quality problems during construction and quality control during construction, Engineering construction reference.