湿陷性黄土地区客运专线路基沉降观测分析

An observation and analysis of passenger dedicated line subgrade in collapsible loess zone

郑西客运专线是我国第一条黄土地区时速300～350km/h铺设无砟轨道的高速铁路,路基沉降控制是保证高速铁路运营安全的重要因素。通过郑西客运专线现场沉降观测资料的分析发现,黄土地基在较小沉降控制要求的情况下具有完成时间较短、沉降趋势符合双曲线分析法、埋设于路基中部的沉降板比埋设于路肩的观测桩沉降曲线拟合性好、路堑地段也有较小的沉降发生等特点,这些结果对进行高速铁路客运专线路基沉降观测设计很有借鉴价值。

Zhengzhou-Xi＇an Passenger Dedicated Line is the speed of loess area of China＇s first 300 - 350km / h without the laying of high-speed railway track ballast, subgrade settlement control is to ensure that high-speed railway operational safety an important factor. Zhengzhou-Xi＇an Passenger Dedicated on-site through the settlement observation data analysis, we found a smaller settlement control of loess foundation required in the circumstances with a completion time is shorter, the settlement trends are consistent with hyperbolic analysis, laid on the roadbed over the central part of the settlement plates laid on the shoulder observation of pile settlement curve fitting is good, there are lots of cutting smaller settlement in its society, These results for high-speed passenger rail line Observation Design of Embankment Settlement great value.