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寒区高速铁路路基混凝土基床试验研究 预览

Experimental Study on Concrete Subgrade Bed of High Speed Railway in Cold Region
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摘要 针对季节性冻土区高速铁路路基冻胀引起的线路平顺性问题,京沈(北京—沈阳)客运专线采用了混凝土基床结构设计,在基床范围内使用混凝土代替A,B组填料。通过监测路基混凝土基床的地温、冻结深度及分层变形发展情况,分析变形对高速铁路行车线路平顺性的影响。结果表明:混凝土基床路基最大变形在2.5mm以内,变形较小,符合高速铁路对线路平顺性的要求。 Aiming at the line smoothness problem caused by frost-heaving of high speed railway subgrade in seasonal frozen soil region,the design of concrete subgrade bed structure was adopted in Beijing-Shenyang passenger dedicated line,and the concrete was used to replace the A,B group filling within the range of subgrade bed.By monitoring the development of ground temperature,frozen depth and layered deformation of concrete subgrade bed,the influence of deformation on the line smoothness of high speed railway was analyzed.The results show that the maximum deformation of concrete subgrade bed is less than 2.5 mm and the deformation is small,which could meet the requirement of line smoothness for high speed railway.
作者 马鹏 蔡德钩 闫宏业 陈锋 崔颖辉 邓逆涛 MA Peng;CAI Degou;YAN Hongye;CHEN Feng;CUI Yinghui;DENG Nitao(China Academy of Railway Sciences,Beijing 100081,China;Railway Engineering Research Institute,China Academy of Railway Sciences Group Co. Ltd. ,Beijing 100081,China)
出处 《铁道建筑》 北大核心 2019年第2期15-17,共3页 Railway Engineering
基金 中国铁路总公司科技研究开发计划(2017G002-W,2016G003-J).
关键词 高速铁路 混凝土基床 试验研究 冻结深度 分层变形 High speed railway Concrete subgrade bed Experimental study Freezing depth Layered deformation
作者简介 第一作者:马鹏(1990-),男,硕士研究生。E-mail:917061564@qq.com.
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