Abstract：Research purposes: Nowadays the study on the subgrade subsidence theory，especially on the subsidence mechanism is done not much．There is a big gap between the calculated result with common—used theory and the real situation．To the subgrade section of Wuhan—Guangzhou Passenger Dedicated Line，CFG pile was used to treat the subgrade and the subgrade subsidence deformation was monitored for seeking the subsidence law with the subsidence curves and predicting the subsidence with the curve fitting method．Through the study and analysis，the subsidence behaviors of CFG pile composite subgrade are known．so the reference can be offered to the construction．
Research conclusions: The following conclusions can be obtained from the study on subgrade subsidence deformation and the prediction of the subgrade subsidence of Wuhan—Guangzhou Passenger Dedicated Line with the curve fitting method：The total subsidence in the subgrade center is bigger than that in the right and left subgrade shoulders and the total subsidence curve in the subgrade center is basically consistent with the grade rate of curve of right and left subgrade shoulders．The biggest subsidence is not in the subgrade center，but in the place 1—2 m away from the subgrade center．The predicted results with double curve fitting method and exponential curve fitting method are over big and the predicted result with three—point method iS over small．However．the predicted result with Asaoka method is mediated with no especial requirement of prediction time and hiigh accuracy．The subsidence can be controlled well by adopting CFG pile composite foundation．
王光勇. 武广客运专线路基沉降监测系统与沉降预测[J]. 铁道工程学报, 2009, 26(5): 5-7.
WANG Guang—yong. Subsidence Monitoring System and Subsidence Prediction for the Subgrade of Wuhan—Guangzhou Passenger Dedicated Line. 铁道工程学报, 2009, 26(5): 5-7.
2009, Vol. 26 
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