高速铁路地基不均匀沉降的因素及机理分析

Analysis of the Factor and Mechanism of Uneven Settlement of High-speed Railway Subgrade

高速铁路路基不均匀沉降量的大小直接影响列车运行的舒适度和安全性,尤其对无砟轨道更是直接影响到其安全使用寿命。高速铁路路基设计和施工必须满足路基的工后沉降要求,支撑路基的地基压密沉降是造成路基工后沉降的最主要原因。地基的沉降变形大小则主要由地基土的性质、地基处理方法决定,通过对高速铁路地基产生不均匀沉降因素的归纳总结和机理分析,以指导高速铁路路基勘察设计及施工。

The uneven settlements of the high-speed railway subgrade would affect the comfort and security of the train,and in particular,the service life of the ballatless track.The compaction settlement of the supporting base for the subgrade is the main reason for the post-construction settlement.Based on the summary and mechanical analysis of the uneven settlement of the high-speed railway subgrade,the paper gets some useful clues to guide the prospecting,design and construction of the high-speed railway subgrade.