Abstract：Research purposes:When the railway passes through the area with unfavorable geological conditions，it is necessary to take the engineering measures for satisfying the requirements of relative specifications and standards，especially the requirements of passenger dedicated line CFG pile is an advanced technology for treating the subgrade base of Wuhan—Guangzhou Passenger Dedicated Line and it call satisfy the requirements of the construction—post subsidence and the high—speed running of train．This paper focuses on studying the construction technology of CFG pile and its quality control method．
Research conclusions: The subgrade filling，construction—post subsidence evaluation，ballastless track laying and observation of them for over one year show if the treatment principle for composite foundation is well followed and the construction quality is effectively controlled for the whole construction process，the design requirements Can be fully satisfied with the small construction—post subsidence of subgrade as the bridge and culvert，forming a perfect configuration of railroad，bridge and tunnel．
2009, Vol. 26 
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