铁路泡沫轻质土路基结构设计应用研究

Application Research on Structural Design of the Foamed Light-Weight Soil Subgrade of Railway

在简述泡沫轻质土特点及工程应用的基础上,结合高速铁路路基填筑及工后沉降控制技术标准,介绍了泡沫轻质土在高速铁路路基帮宽、软土地基处理、过渡段差异沉降及狭小空间填筑等特殊条件地段的应用研究;综述了铁路泡沫轻质土路基性能设计采用湿密度与强度两大控制指标要求,以及泡沫轻质土的静动力学性能、耐久性能及路基整体结构的动力稳定性能要求;归纳了铁路泡沫轻质土路基设计基本原则及方法;总结了铁路泡沫轻质土路基结构设计及构造设计的主要内容。通过近些年对铁路泡沫轻质土路基应用研究成果总结,为铁路泡沫轻质土路基的进一步推广应用提供借鉴。

On the basis of brief description of the feature and engineering application of the foamed light-weight soil,it is combined with high-speed railway subgrade filling and post-construction settlement control technology standard.The application research on the foamed light-weight soil in the special conditions is introduced.It is applied to the high-speed railway subgrade widening,soft foundation treatment,differential settlement in the transition section and subgrade filling in the small space.The controlling requirements of wet density and strength of compression for performance design of the foamed light-weight soil for railway subgrade are summarized.The requirements of static and dynamic performance,durability performance and the dynamic stability of foamed light-weight soil are summarized.The basic principles and methods of foamed light-weight soil for railway subgrade design are concluded.The main contents of railway subgrade structural design and auxiliary structural design of foamed light-weight soil are summarized.Based on the summary of research results on the application of foamed light-weight soil for railway subgrade in recent years,it can provide reference for further promotion and application of foamed light-weight soil for railway subgrade.