Prediction of Post-construction Settlement of Airport Subgrade and Its Application

To cope with the drawbacks of the traditional method of foundation settlement rate,according to the basic principles of settlement rate method based on primary consolidation settlement of the foundation with linear load mode,the linear load mode was first applied to exponential decay model of rockfill creep,and to time-dependent deformation of rockfill was simulated successfully.Using coupling analysis of ground consolidation and the rockfill creep,a subgrade surface settlement rate method for post-construction settlement prediction of airfield subgrade was established,and the control specification for airfield subgrade surface settlement rate was further proposed considering the engineering geological conditions and allowable post-construction settlement.The successful project practice applied in a major national project verified the reliability of this method.The engineering practice of the airfield subgrade surface settlement rate indicates that the method abolished settlement monitoring for embankment construction stage,avoided the interaction between construction and monitoring,and has universal significance and value of engineering practice.