时速200km客货共线铁路遂渝线软土路基设计

Soft Soil Subgrade Design for 200km/h Mixed Passenger and Freight Railway of Suining-Chongqing Railway

研究目的:通过对遂渝铁路复合地基设计计算数据与现场施工实测数据的对比分析,明确200 km/h铁路地基处理主要受沉降控制而非稳定控制,找出理论计算值与现场实测值的关系,为以后客运专线地基处理设计积累经验。研究方法:以粉喷桩和碎石桩复合地基加固为例,通过理论计算与实测数据的对比分析,用现场实测数据来修正我们的理论设计,以完善我们的理论计算。研究结论:遂渝铁路采用粉喷桩和碎石桩加固处理软粘土地基是可行的、经济合理的;在进行200 km/h铁路及速度目标值更高的客运专线复合地基设计时,应以沉降控制为主,稳定性控制次之;粉喷桩和碎石桩等复合地基路堤的总沉降以施工期的地基沉降为主,工后沉降同样以地基沉降为主,工后沉降速率最大的是路堤竣工后前半年左右,之后趋于缓和。

Research purposes： By comparing the calculation and measured data, it is confirmed that the subgrade of passenger dedicated railway which targeted speed is 200 km/h is should be designed according to the settlement after construction. Through establishing the relationship between theoretical results and measured data, experiences are accumulated for foundation treatment design of passenger dedicated railway. Research methods ：Soft soil foundation reinforced with dry jet mixing pile and cushed stone pile are research subject in this paper. By comparing the theoretical calculation and monitoring data, the subgrade design methods are corrected and developed. Research conclusions： It is feasible and economic that the soft soil foundation of Suining - Chongqing railway is treated with dry jet mixing pile and crushed stone pile. Passenger dedicated railway railways which targeted speed is 200 km/h and higher than 200 km/h is should be designed according to the settlement after construction. Total settlement of the soft soil foundation treated with dry jet mixing pile and crushed stone pile is made up mainly by the settlement occurred in the course of construction. The rate of settlement of compound foundation achieve maximum value half a year after construction, and then it decreased.