季冻区重载铁路路基冻胀融沉监测及规律分析  

Monitoring and Rule Analysis of Frost Heaving and Thawing Settlements of Heavy Haul Railway Roadbed in Seasonal Frozen Region

作　　者：张玉芝[1,2,3] 杨威 李锐[5] 赵维刚[1] 张广远[1] 李裴 ZHANG Yuzhi;YANG Wei;LI Rui;ZHAO Weigang;ZHANG Guangyuan;LI Pei(Structure Health Monitoring and Control Key Laboratory of Hebei Province,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;Collaborative Innovation Center for Performance and Safety of Large-Scale Infrastructure,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China;Yuanping Company,Shuohuang Railway Development Co.,Ltd.,Yuanping Shanxi 034100,China)

机构地区：[1]石家庄铁道大学河北省大型结构健康诊断与控制重点实验室,河北石家庄050043 [2]石家庄铁道大学大型基础设施性能与安全省部共建协同创新中心,河北石家庄050043 [3]石家庄铁道大学道路与铁道工程安全保障省部共建教育部重点实验室,河北石家庄050043 [4]石家庄铁道大学土木工程学院,河北石家庄050043 [5]朔黄铁路发展有限责任公司原平公司,山西原平034100

出　　处：《中国铁道科学》2022年第5期1-10,共10页China Railway Science

基　　金：国家自然科学基金资助项目(52078312,51708369);河北省重点研发计划项目(19210804D);朔黄铁路发展有限责任公司技术开发项目(SHGF-15-41);石家庄铁道大学研究生创新资助项目(YC2022015)。

摘　　要：为研究季冻区重载铁路路基冻胀融沉变化规律,提出构建路基长期自动监测系统,获取多参量监测数据以全面分析路基变形规律。首先,分析季冻区重载铁路路基稳定性特点,确定路基稳定性监测方案及系统构建原则;然后,以朔黄铁路典型路基病害地段为例,建立路基稳定性远程自动监测系统,实现地温、含水量、冻胀变形及加速度等多参量远程自动连续的传输及采集。结果表明:在大气温度影响下,路基地温和含水量随之发生变化,进而引发冻胀融沉变形;监测断面横向存在地温和变形的差异;监测位置的含水量主要受大气降水影响;冻结期路基刚度和不均匀变形程度均增大,导致列车通过时的振动反应加剧。In order to study the variation rules of frost heaving and thawing settlements of heavy haul railway(HHR) roadbeds in seasonal frozen regions, a long-term automatic monitoring system for roadbed was proposed to obtain multi-parameter monitoring data for a comprehensive analysis of the laws of roadbed deformation.This paper firstly analyzed the stability characteristics of HHR roadbeds in seasonal frozen regions and defined the monitoring scheme for roadbed stability and the construction principle of the system. Then, taking the typical roadbed-disease section of Shuohuang Railway as an example, the remote automatic monitoring system for roadbed stability was established, which realized the remote, automatic and continuous transmission and acquisition of multiple parameters such as ground temperature, water content, frost heave deformation and acceleration. The results show that, under the influence of atmospheric temperature, the ground temperature of the roadbed and its water content varies accordingly, which then leads to the deformation of frost heaving and thawing settlement. There are differences in ground temperature and deformation in the monitored transverse sections. The water content of the monitored section is mainly affected by atmospheric precipitation.The increases in both roadbed stiffness and uneven deformation during the freezing period lead to the intensification of vibration response when the train passes.

关 键 词：路基稳定性监测 季节性冻土 重载铁路 冻胀变形 加速度 

分 类 号：U213.1[交通运输工程—道路与铁道工程]