铁道标准设计Issue(6)：32-34,40,4.DOI:10.13238/j.issn.1004-2954.2014.06.008
浅埋式桩板结构在宝兰客运专线湿陷性黄土短路基中的应用研究
Research on Shallowly-Buried Sheet-Pile Structure Used in Short Subgrade of Baoji-Lanzhou Railway Passenger Dedicated Line in Collapsible Loess Region
摘要
Abstract
In northwest China, the geological condition is so complicated that there are widespread alluvial, diluvial and aeolian loess. And in its mountain area where the Baoji-Lanzhou Railway passenger dedicated line passes through, the deep and thick stratum of collapsible loess is characterized by high compressibility, high collapsibility, easy to collapse when meeting water, and so on. Still more, the requirement stipulated in technical code about subgrade post-construction settlement is very strict, while there are frequent transitions among subgrades and bridges and tunnels, forming stiffness differences and post-construction settlement differences among them, and then inevitably affecting the stiffness uniformity and deformation uniformity of the ballastless track. This paper, focusing on the problems above, and in combination with the project of Baoji -Lanzhou Railway passenger dedicated line, analyzed and In northwest China, the geological condition is so complicated that there are widespread alluvial, diluvial and aeolian loess. And in its mountain area where the Baoji-Lanzhou Railway passenger dedicated line passes through, the deep and thick stratum of collapsible loess is characterized by high compressibility, high collapsibility, easy to collapse when meeting water, and so on. Still more, the requirement stipulated in technical code about subgrade post-construction settlement is very strict, while there are frequent transitions among subgrades and bridges and tunnels, forming stiffness differences and post-construction settlement differences among them, and then inevitably affecting the stiffness uniformity and deformation uniformity of the ballastless track. This paper, focusing on the problems above, and in combination with the project of Baoji -Lanzhou Railway passenger dedicated line, analyzed and researched the treatment measure for the deep and thick collapsible loess by the use of shallowly-buried sheet-pile structure, with the result that this sheet-pile structure not only was able to meet the requirement on subgrade post-construction settlement but also was able to effectively reduce post-construction settlement differences among the different structures.关键词
宝兰客运专线/无砟轨道/湿陷性黄土/桩板结构Key words
Baoji-Lanzhou Railway passenger dedicated line/ballastless track/collapsible loess/sheet-pile structure分类
交通工程引用本文复制引用
张然..浅埋式桩板结构在宝兰客运专线湿陷性黄土短路基中的应用研究[J].铁道标准设计,2014,(6):32-34,40,4.基金项目
中铁第一勘察设计院集团有限公司科研项目(院科12-13) （院科12-13）
