高速铁路路基填料冻胀试验研究  

Experimental research of the subgrade padding frost heaving of high-speed railway

作　　者：冷景岩[1] 付新平[1] 杨军杰[1] 

机构地区：[1]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《冰川冻土》2015年第2期440-445,共6页Journal of Glaciology and Geocryology

基　　金：中国铁路总公司科研项目(Z2013-038)资助

摘　　要：路基冻胀是季节冻土区修建高速铁路必须面对的关键性技术难题.国内外针对路基填料的冻胀机理和特性进行了很多研究,但很少涉及路基填料的渗透性问题.通过室内试验研究了细颗粒含量对路基填料含水量和冻胀率的影响,通过现场试验研究了路基填料的渗透性能,选取哈齐客专某试验段路基进行冻胀监测,验证了防冻层填料的导水特征及其防冻胀性能.结果表明:采用填料防冻的技术路线是可行的,通过合理控制填料组分、级配、细颗粒含量等设计参数,严格把控施工质量,路基填料能够满足高速铁路路基防冻胀要求.For high-speed railway construction in seasonally frozen soil regions,a critical technical problem is subgrade frost heaving. The frost heaving mechanisms and characteristics of subgrade padding have been researched a lot at home and abroad,but the problem of permeability of the subgrade padding has seldom been involved. In this paper,the influence of fine particle content on the subgrade padding water content and frost heaving radio were studied through laboratory experiment,and the permeability of subgrade padding was also studied,then the water diversion features and anti-frost performance of frost protection padding layer were verified by monitoring the subgrade frost heaving in the Harbin-Qiqihar High-Speed Railway. The results show that the antifreeze technical route with padding is feasible by controlling design parameters rationally,such as controlling padding component,gradation and fine particle content. Under the condition of controlling the quality of construction strictly,subgrade padding material can meet the frost protection requirements of high-speed railway subgrade.

关 键 词：路基冻胀 季节冻土 高速铁路 路基填料 

分 类 号：U213.14[交通运输工程—道路与铁道工程]