深厚软基路堤新老铁路搭接施工技术结合咬合水泥搅拌桩施工技术的研究

Research on Deep Soft Ground Road Embankment and Old Railway Joint Construction Technology with Mouth-to-Mouth Pile Technology of Cement Mixing Pile

在铁路建设中,若新建铁路线路和既有线重叠,可考虑对原有路基进行保留,在原有路堤的基础上填筑新路基,这种方法被称为新老路基搭接施工法。这种施工放方法的核心概念是在现有的老路基上逐渐建立新路基,以确保新老路基搭接沉降差异小,同时最大限度地降低成本,缩短施工时间。本研究着重模拟了搭接施工过程中路基的沉降行为,通过有限元建模型模拟结果,随后与实际观测的沉降数据进行了对比。通过这一分析,我们可以深入了解搭接施工中各个因素对路基沉降的影响。分析的结果,揭示了铁路路基施工的一些改进的方向。

In railway construction,if the new railway line overlaps with the existing line,it can be considered to preserve the original roadbed and fill a new roadbed on the basis of the original roadbed.This method is called the new old roadbed overlap construction method.The core concept of this construction method is to gradually establish a new roadbed on the existing old roadbed to ensure that the difference in overlapping settlement between the new and old roadbeds is small,while minimizing costs and shortening construction time.This study focuses on simulating the settlement behavior of the roadbed during the overlapping construction process.The simulation results were obtained through finite element modeling,and then compared with the actual observed settlement data.Through this analysis,we can gain a deeper understanding of the impact of various factors in overlapping construction on roadbed settlement.The results of the analysis reveal some improvement direction of the railway subgrade construction.