寒区高速铁路路堑段路基冻害原因及整治方案  

Cause and Treatment Scheme of Subgrade Frost Damage in Cutting Section of High Speed Railway in Cold Area

作　　者：令狐勇生[1] 马超锋[2] LINGHU Yongsheng;MA Chaofeng(Track Maintenance Division of Taiyuan Railway Administration,Taiyuan Shanxi 030013,China;Railway Engineering Research Institute,China Academy of Railway Sciences,Beijing 100081,China)

机构地区：[1]太原铁路局工务处,山西太原030013 [2]中国铁道科学研究院铁道建筑研究所,北京100081

出　　处：《铁道建筑》2017年第11期73-75,共3页Railway Engineering

基　　金：国家自然科学基金高铁联合基金(U1434211);中国铁道科学研究院基金(2016YJ032);中国铁路总公司科技研究开发计划(2017G004-D)

摘　　要：以寒区一高速铁路工程为依托,介绍了路堑段路基冻害情况,通过分析发现路基填料中细颗粒超标,含水率高且无法正常疏排、地区气温较低且持续时间长是路堑段路基冻害发生的主要原因。提出了"上封+下排+保温"的冻害综合整治方案,采取了封闭两线间混凝土封闭层离缝、疏排基床表层入渗水、疏排路基本体中毛细水、施作深埋保温排水盲管等措施。整治后经历了一个完整低温季节,轨道检测车检测数据显示该区段路基冻害已消除。Based on a high speed railway project in cold area,the frost damage of subgrade in cutting section was introduced.Through the analysis,it is found that the fine particles in subgrade fillings exceed the standard,the water content is high which cannot be drained normally,and the low temperature and long duration are the main causes of subgrade frost damage in the cutting section.Comprehensive renovation scheme of frost damage which is upperpart enclosing+underpart drainage+heat preservation was put forward,and the measures including closing the concrete sealing layer cracks between two lines,draining water seepage in the surface of subgrade bed,draining the capillary water in the basic body of subgrade and making deep buried insulated drainage blind pipe.Test data of track inspection car shows that the frost damage of subgrade in this section has been eliminated during a complete low temperature season.

关 键 词：高速铁路 冻害整治 现场试验 路基 保温盲沟 横向排水管 

分 类 号：U213.15[交通运输工程—道路与铁道工程]