| 整体道床铁路隧道隧底病害成因分析及整治方案设计 |
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| 引用本文： | 马超锋.整体道床铁路隧道隧底病害成因分析及整治方案设计[J].铁道建筑,2019(6):69-73. |
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| 作者姓名： | 马超锋 |
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| 作者单位： | 中国铁道科学研究院集团有限公司铁道建筑研究所 |
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| 基金项目： | 国家自然科学基金委员会—中国铁路总公司高速铁路基础研究联合基金(U1434211);中国铁路总公司科技研究开发计划项目(2017G004-D);中国铁道科学研究院基金(2016YJ032,2017YJ029) |
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| 摘 要： | 总结整体道床铁路隧道隧底病害特点,分析了各类主要病害的成因机理,提出了相应的整治方案设计,通过工程实例验证整治方案的有效性。整体道床隧道内轨道平顺性对于隧底各类病害较为敏感,隧底易形成高压地下水而造成轨道上拱,往往多种病害同时产生。提出了“道床锚固+离缝充填+细颗粒固结+合理排水”的综合整治方案。以唐呼线集宁隧道下行线隧底病害整治工程为例,开展了方案现场应用,整治效果良好。
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| 关 键 词： | 铁路隧道 整体道床 病害特征 整治方案 沉降 离缝 上拱 |
Cause Mechanism and Treatment Scheme of Tunnel Bottom Defects of Railway Tunnel with Monolithic Roadbed |
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| MA Chaofeng.Cause Mechanism and Treatment Scheme of Tunnel Bottom Defects of Railway Tunnel with Monolithic Roadbed[J].Railway Engineering,2019(6):69-73. |
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| Authors: | MA Chaofeng |
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| Institution: | (Railway Engineering Research Institute,China Academy of Railway Sciences Group Co.Ltd.,Beijing 100081,China) |
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| Abstract: | The characteristics of tunnel bottom defects in railway tunnel with monolithic roadbed were summarized.Defect cause mechanism of main defects were analyzed,and the design of defect treatment scheme were proposed.The effectiveness of treatment scheme was varified by engineering examples.The track smoothness in railway tunnel with monolithic roadbed are sensitive to the tunnet bottom defects,tunnel bottom high pressure in groundwater commonly leads to track arching.A variety of defects usually occur at the same time.A comprehensive treatment scheme is proposed including roadbed anchorage,off-seam f illing,f ine particles consolidation and reasonable drainage.The proposed defect treatment is applied in Tangshan-Hohhot Railway Jining Tunnel and its effect is verif ied. |
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| Keywords: | Railway tunnel Monolithic roadbed Defect characteristics Treatment scheme Settlement Off-seam Arching |
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