铁道科学与工程学报2016，Vol.13Issue(3)：430-434,5.
软基高铁 TQI 与路基沉降对比研究
Co mparative study on the TQl and subgrade settle ment of the high -speed railway in soft soil foundation
摘要
Abstract
The TQI overrun can reflect the great difference of track geometry.The high speed railway operation safety and comfort are threatened because of the track irregularity.The existing research has not clarified whether there is a corresponding relationship between soft soil subgrade settlement overrun and TQI overrun. Thus,there are two inconsistent railway maintenance method,which causes trouble for the maintenance depart-ment.In order to explore this issue and provide scientific guidance for track management and maintenances, the TQI data and the subgrade settlement data of Shanghai Nanjing Intercity High -speed Railway during oper-ating period were compared and analyzed based on the method of mathematical statistics in this paper.The re-sults show that,there is a certain correlation between the TQI and the subgrade settlement,and the TQI over-run sections contain most of the subgrade settlement overrun sections.Among all TQI single indexes,longitudi-nal level irregularity index,horizontal level irregularity index and twist irregularity index are significantly corre-lated with subgrade settlement.Furthermore,there is a linear positive correlation between longitudinal level ir-regularity index,horizontal level irregularity index,twist irregularity index and subgrade settlement.After a-nalysis,if the TQI was used as major reference standards of for maintenance,the maintenance department needs to strengthen the analysis of TQI single index.When the data of longitudinal level irregularity index,hor-izontal level irregularity index and twist irregularity index is too large or even exceed the management value in a determination section.Maintenance department should conduct settlement observation in order to determine whether there is a settlement overrun section,and unify the most unfavorable situation of subgrade settlement and TQI to make reasonable maintenance plan.关键词
软基/高速铁路/TQI/路基沉降Key words
soft soil foundation/high -speed railway/TQI/subgrade settlement分类
交通工程引用本文复制引用
路良恺,徐林荣..软基高铁 TQI 与路基沉降对比研究[J].铁道科学与工程学报,2016,13(3):430-434,5.基金项目
铁道部科技研究开发计划资助项目 （）
