The pile-supported subgrade structure is proposed in view of the sliding and instability of the high-filled soft soil subgrade,and the settlement and deformation characteristics of the pile-supported subgrade are studied through the field monitoring test.The results show that:1)Under the influence of closure effect,the settlement shape in the crosssection of the pile-supported roadbed presents an obvious"settling basin"character;2)The vertical de-formation of the subgrade is mainly composed of the foundation settlement and the shrinkage deformation of the light-weight soil subgrade itself.
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