我国无砟轨道铁路路基技术的进步与发展

截止2019年,我国已建成高速铁路3.5万km,其中路基长度约1万km,涵盖我国由南到北、从东到西,除西藏地区外的不同气候、不同地貌、不同地形、不同地质区域。大规模的高速铁路建设,极大促进了我国无砟轨道铁路路基技术的进步与发展。本文梳理、总结了我国无砟轨道铁路路基取得的技术进步,主要体现在:(1)建立了一套无砟轨道铁路路基设计理论;(2)建立了路基与桥、隧等构筑物连接刚度协调匹配的技术体系;(3)创新了不同区域、复杂环境、特殊地质条件下的路基毫米级沉降变形控制技术;(4)创新了无砟轨道铁路路基稳定状态长期保持技术。同时,本文还探讨了无砟轨道铁路路基有待进一步研究的技术问题。

Progress and Development of Subgrade Technology of Ballastless Track Railway in China

By 2019,35000 kilometers of high-speed railway had been built in China,including about 10000 kilometers of subgrade,covering different climates,landforms,topographies and geological regions from south to north,from east to west,except Tibet region.Large-scale high-speed railway construction greatly promotes the progress and development of technologies for subgrade of ballastless track railway in China.This paper summarizes the technical progress of subgrade of ballastless track railway in China,which is mainly reflected as follow:(1)establishing a set of subgrade design theory of ballastless track railway;(2)establishing the technical system for coordination and matching of the connection stiffness between subgrade and bridge and between subgrade and tunnel;(3)innovating the millimeter settlement and deformation control technology of subgrade in different regions,complex environments and special geological conditions;(4)innovating the technology for maintaining the long-term stability of ballastless track railway subgrade.And this paper also discusses the technical problems of ballastless track railway subgrade to be further studied.