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冰川冻土 ›› 2017, Vol. 39 ›› Issue (5): 997-1003.doi: 10.7522/j.issn.1000-0240.2017.0301

• 冰冻圈与全球变化 • 上一篇    下一篇

青藏铁路沿线融区的特征及其变化趋势

孙志忠, 温智, 穆彦虎, 武贵龙, 贠汉伯, 张淑娟   

  1. 中国科学院 西北生态环境资源研究院 冻土工程国家重点实验室, 甘肃 兰州 730000
  • 收稿日期:2016-12-20 修回日期:2017-04-20 出版日期:2017-10-25 发布日期:2018-01-27
  • 作者简介:孙志忠(1974-),男,辽宁清原人,副研究员,2006年在中国科学院寒区旱区环境与工程研究所获博士学位,从事冻土工程与环境研究.E-mail:sun@lzb.ac.cn.
  • 基金资助:
    国家自然科学基金项目(41571064;41630636;41471061);冻土工程国家重点实验室自主研究项目(SKLFSE-ZT-09)资助

Characteristics and variation of the taliks along the Qinghai-Tibet Railway

SUN Zhizhong, WEN Zhi, MU Yanhu, WU Guilong, YUN Hanbo, ZHANG Shujuan   

  1. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2016-12-20 Revised:2017-04-20 Online:2017-10-25 Published:2018-01-27

摘要: 基于青藏铁路多年冻土区工程长期监测系统所获取的地温与变形资料,对铁路沿线4处融区的特征及其变化趋势进行了分析。这4处融区分别为沱沱河北面洼地辐射-渗透融区(R1)、休冬曲北岸河流融区(R2)、扎加藏布河西岸河流融区(R3)与洼里希里唐盆辐射-渗透融区(R4)。结果表明:R1土体温度处于升温中,融区正在发展;R2土体温度较为稳定,位于融区边缘地带;R3土体升温趋势明显,融区处于快速发展之中;R4深部土体温度较为稳定,融区仍处于稳定状态。在R1、R3与R4,路基下未形成隔年冻土;但在R2融区,路基下有形成隔年冻土的可能。监测期内,路基累计沉降变形小于50 mm,满足铁路路基设计规范的要求。

关键词: 融区, 多年冻土, 渗透-辐射融区, 河流融区, 隔年冻土

Abstract: Based on the long-tern monitoring of ground temperature and deformation of taliks along the Qinghai-Tibet Railway from 2006 through 2013, the characteristics of taliks in the Monitoring Sites R1-R4 are analyzed. The four taliks were infiltration-radiation talik in the north Tuotuo River (R1), river talik in the Xiudongqu (R2), river talik in the west Zhajiazangbu River (R3) and infiltration-radiation talik in Walixilitangpen (R4), respectively. The results indicate that the ground temperature in Site R1 had increased with time and the talik had been under development; the ground temperature and talik in Site R2 had been in a stable state; in Site R3, the ground temperature had obviously increased and the talik had extended rapidly; in Site R4, the deep ground temperature had been relatively stable and the talik had been also in a state of stability. The pereletok had not been formed beneath the embankments in Sites R1, R3 and R4, but it possibly had been formed beneath the embankment in Site R2. During the monitoring period, the accumulative settlement of each embankment was less than 50 mm, meeting the requirement of design standard.

Key words: talik, permafrost, infiltration-radiation talik, river talik, pereletok

中图分类号: 

  • P642.14