湿陷性黄土地区客运专线无砟轨道桥梁沉降预测及铺设条件评估技术

桥梁墩台沉降预测采用曲线回归法,其结果是衡量线下工程是否具备无砟轨道铺设条件的依据之一。无砟轨道铺设前必须进行评估,以确认线下工程的沉降变形已趋于稳定。结合郑西客专湿陷性黄土地区桥梁墩台无砟轨道铺设条件评估实践,从沉降分析、回归模型选择、分析评估方法、回归影响因素及评估结果认定等方面对桥梁沉降预测及无砟轨道铺设条件评估进行了探讨,对形成可靠适用的桥梁沉降预测评估技术有一定参考价值。

Evaluation Techniques of Bridge Settlement Prediction and Laying Conditions for PDL Ballasless Track in Collapsible Loess Areas

The curve regression method adopted in bridge pier settlement prediction is used to measure whether the offline works has the laying condition for ballastless tracks.Before laying balastless tracks,an evaluation must be carried out to confirm that the settlement and deformation of offline works have remained stable.Based on evaluation practice of bridge pier ballastless track laying conditions in Zhengzhou-Xi'an Passenger Dedicated Line in collapsible loess areas,this article discusses the bridge settlement...