中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (S2): 6-10.doi: 10.16265/j.cnki.issn1003-3033.2018.S2.002

• 安全科学技术基础学科 • 上一篇    下一篇

青藏铁路沿线填土路基下多年冻土的演化规律*

韩龙武1,2 高级工程师, 杨印海1 高级工程师, 戴路生3, 张芳1 高级工程师, 程佳1,2 高级工程师   

  1. 1 中铁西北科学研究院有限公司,甘肃 兰州 730030;
    2 青海省冻土与环境工程重点实验室,青海 格尔木 816000;
    3 国家铁路局 工程质量监督中心,北京 100891
  • 收稿日期:2018-09-30 修回日期:2018-11-15 出版日期:2018-12-30 发布日期:2020-11-11
  • 作者简介:韩龙武 (1970—),男,河南济源人,硕士,高级工程师,主要从事多年冻土工程技术方面的研究。E-mail:hanlongwu@163.com。
  • 基金资助:
    中铁科研院项目(2017-KJ007-Z007-XB)。

Variation of permafrost on fill embankments along Qinghai-Tibet railway

HAN Longwu1,2, YANG Yinhai1, DAI Lusheng3, ZHANG Fang1, CHENG Jia1,2   

  1. 1 Northwest Research Institute Co., Ltd. of C.R.E.C, Lanzhou Gansu 730030,China;
    2 Qinghai Province Key Laboratory of Permafrost and Environmental Engineering, Golmud Qinghai 816000,China;
    3 Center of Engineering Quality Supervision, National Railway Administration, Beijing 100891, China
  • Received:2018-09-30 Revised:2018-11-15 Online:2018-12-30 Published:2020-11-11

摘要: 在全球气候变暖的背景下,青藏铁路沿线多年冻土目前处于退化状态,冻土退化将会对线路的稳定性产生影响,为解决这一问题,收集青藏铁路沿线多年冻土区冻土上限的观测数据,并比较2007年和2015年的数据,分析填土路基断面冻土上限特征,探讨减缓路基工程变形的工程措施。结果表明:青藏铁路多年冻土区填土路基人为上限有所抬升;由于线路存在左右侧阴阳坡的差异,致使两侧路肩以下人为上限形态差异性更加明显,并且冻土升温退化显著;对于青藏铁路多年冻土区路基,在工程边坡铺设碎石有助于应对气候变化引起的多年冻土退化导致的路基工程变形问题。

关键词: 青藏铁路, 多年冻土退化, 阴阳坡, 填土路基, 人为上限

Abstract: Under the background of global warming, permafrost along the Qinghai-Tibet railway was in a state of degradation, which would affect the stability of the railway. In order to solve this problem, the observation data was collected about permafrost upper limit along Qinghai-Tibet railway.The data of 2007 and 2015 was compared.The characteristics of permafrost upper limit of filling subgrade section was analyzed, The engineering measures to reduce the deformation of subgrade engineering was discussed. The results showed that the artificial upper limit of filling subgrade in permafrost region of Qinghai-Tibet railway had been raised,comparing with the observed data in 2007 and 2015. Because of the difference between the left and right sides of the sunward and shady slope, the difference of the artificial upper limit below the left and right shoulders was more obvious.The temperature-rise of permafrost is obviously degraded. Laying gravel on roadbed slope in permafrost region of Qinghai-Tibet railway is helpful to dealing with subgrade deformation caused by permafrost degradation caused by climate change.

Key words: Qinghai-Tibet railway, permafrost degradation, sunward and shady aspect, filling embankments, artificial upper limit

中图分类号: