路基工后沉降控制技术在秦沈客运专线的应用

研究目的：本文对软土及松软土路基工后沉降控制技术进行探讨和总结，为今后修建类似铁路提供参考和经验。 研究方法：结合秦沈客运专线路基工后沉降控制情况，详细分析并确定了适合客运专线软土及松软土路基的设计计算基本程序；探讨了沉降观测方法、观测精度、频率及由实测的沉降资料进行未来沉降预测的方法。 研究结果：提出了软土及松软土路基工后沉降控制技术及动态设计的基本步骤。 研究结论：运用软土及松软土路基工后沉降控制技术，能够对路基工后沉降和沉降速率进行精确控制。

Application of the Control Technique for the Settlement after Construction in Qinhuangdao-Shenyang Passenger Dedicated Railway Line

Research purposes: This paper discusses and sums up the technique to control the settlement after construction and it provides the experience of building passenger dedicated railway line in soft soil zone for railway construction in similar region in the future. Research methods:Combined with the circumstance of the settlement control after construction of Qinhuangdao-Shenyang passenger dedicated railway line,the basic design and compute procedures for loose soft soil roadbed are analysed detailedly and confirmed in this paper.The prognosticate method,prognosticate accuracy,frequency and various method to estimate settlement in the future from actually measure data are also discussed. Research results:The control technique of the settlement after construction and the basic step and contentses of dynamic designs for the soft soil and the loose soft soil roadbed are put forward finally. Research conclusions:We can control the settlement after construction and ground decline velocity by adopting the control technique of the settlement after construction in soft soil zone.