| 严寒地区高速铁路路基冻胀变形监测分析 |
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| 引用本文： | 石刚强,赵世运,李先明,牛永红.严寒地区高速铁路路基冻胀变形监测分析[J].冰川冻土,2014,36(2):360-368. |
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| 作者姓名： | 石刚强 赵世运 李先明 牛永红 |
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| 作者单位： | 兰州大学土木工程与力学学院/西部灾害与环境力学教育部重点实验室,甘肃兰州730000;哈大铁路客运专线有限公司,辽宁沈阳110002;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000 |
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| 基金项目： | 国家科技支撑计划项目（2012BAG05B00）；中国科学院西部行动计划项目（KZCX2-XB3-19）；铁道部科技研究开发计划项目（2008G006；Z2012-062）资助 |
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| 摘 要： | 穿越我国东北地区的哈尔滨至大连高速铁路(哈大高铁)是世界上首条投入运营的新建严寒地区高速铁路,路基冻胀防治采用了换填材料、防水等综合措施.为评价冻胀防治效果及路基工程运营状况,通过对哈大高铁开通后首个冻融期(2012-2013年度)路基全线9 641个凸台观测点水准人工监测数据综合分析,研究路基冻胀变形发生、发展和变化规律.结果表明:哈大高铁路基冻胀变形包括冻胀快速发展期、冻胀稳定发展期和融化回落期3个阶段,路基普遍发生冻胀但变形处于可控状态;路基的冻胀变形以基床表层冻胀为主,且其程度与路基结构有关;整体上全线过渡段冻胀轻微,路堤次之,路堑和底座板接缝处较为严重.建议后续冻胀整治应以减少路基表水下渗、控制基床表层冻胀变形为重点;类似工程设计中,应增加以桥代路段落,将路基表层改性为不冻胀整体结构.
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| 关 键 词： | 高速铁路 季节冻土 路基 冻胀 变形监测 |
| 收稿时间： | 2013-10-16 |
The frost heaving deformation of high-speed railway subgrades in cold regions：Monitoring and analyzing |
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| SHI Gangqiang,ZHAO Shiyun,LI Xianming,NIU Yonghong.The frost heaving deformation of high-speed railway subgrades in cold regions：Monitoring and analyzing[J].Journal of Glaciology and Geocryology,2014,36(2):360-368. |
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| Authors: | SHI Gangqiang ZHAO Shiyun LI Xianming NIU Yonghong |
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| Institution: | 1. School of Civil Engineering and Mechanics, Lanzhou University/Key Laboratory of Mechanics on Disaster and Environment in Western China, The Ministry of Education of China, Lanzhou 730000, China;2. Harbin-Dalian Railway Passenger Dedicated Line Co. Ltd., Shenyang 110002, China;3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Harbin-Dalian High-Speed Railway, crossing Northeast China, is the first new-built and operating high-speed railway in cold regions around the world. The subgrades of the railway were treated with filling material replacement and taking waterproof measures and so on to prevent frost damages. For evaluating the effects of the frost heaving prevention and engineering operation status of the subgrades, the monitoring data during the first freeze-thaw period (2012-2013) from 9,641 monitoring points along the railway were analyzed. The occurrence, development and changing of the frost heaving were summarized. It is found that the development of the frost heaving includes the rapid growing stage, the stable frost heaving stage and the thawing settlement stage. The frost heaving deformation occurs along the whole line, but the frost heaving amount, great or small, is under control. The frost heaving degrees are related to the subgrade structures. The frost heaving occurs mainly in shallow part of a subgrade base, and its damage degree depends on the subgrade structure. On the whole, the frost heaving in the transition section is slight, followed by that in the embankments, and it is most serious in the cutting sections or in the base-plate jointing parts. As engineering treatments against frost heaving, it is suggested to focus on reducing surface water infiltration and control frost heaving deformation of the subgrade base. And in the designing of high-speed railway in seasonal frozen soil regions, bridges are strongly recommended instead of subgrade, and to modify the upper layer of the subgrade to no frost heaving structure. |
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| Keywords: | high-speed railway seasonal frozen soil subgrade frost heaving deformation monitoring |
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