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冰川冻土 ›› 2018, Vol. 40 ›› Issue (2): 362-369.doi: 10.7522/j.issn.1000-0240.2018.0041

• 寒区科学与技术 • 上一篇    下一篇

寒区桩基热稳定性研究进展

陈辉1,2, 张泽2, 冯文杰2, 史向阳2, 明姣2, 杜玉霞2   

  1. 1. 兰州大学 土木工程与力学学院, 甘肃 兰州 730000;
    2. 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:2016-03-03 修回日期:2017-03-25 出版日期:2018-04-25 发布日期:2018-07-02
  • 通讯作者: 张泽,E-mail:zhangze@lzb.ac.cn E-mail:zhangze@lzb.ac.cn
  • 作者简介:陈辉(1991-),男,湖北黄石人,2015年在兰州大学获学士学位,现为兰州大学在读硕士研究生,从事冻土土质学、寒区工程地质与环境研究.E-mail:hchen13@lzu.edu.cn
  • 基金资助:
    中国科学院“西部之光”博士项目(张泽);国家自然科学基金项目(41771078);青海省交通科学研究院开放基金项目(2016-01-04)资助

Research progress of piles' thermostability in cold regions

CHEN Hui1,2, ZHANG Ze2, FENG Wenjie2, SHI Xiangyang2, MING Jiao2, DU Yuxia2   

  1. 1. School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, China;
    2. State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2016-03-03 Revised:2017-03-25 Online:2018-04-25 Published:2018-07-02

摘要: 桩基础锚固长度大、埋置深,对地温场的扰动小、回冻快,在青藏高原多年冻土区被广泛使用。寒区桩基热稳定性研究是一个交叉面广、综合性较强的问题,它涉及到传热学、冻土学、桩基础的设计、桩-土相互作用等多方面的内容。在大量文献基础上,从现场试验、模型试验、理论计算等角度,对寒区桩基热稳定研究现状进行了总结和分析,文献研究表明:土体回冻过程受众多因素影响,而影响程度最大的是混凝土浇筑时的水化热释放;在全球变暖的情形下,未来50年青藏高原冻土退化严重,对桩基热稳定性构成威胁,需要采取相应的保护措施。

关键词: 桩基热稳定性, 土体回冻过程, 气候变化, 保护措施, 多年冻土

Abstract: Due to a plenty of advantages, such as long anchorage length, deep burial, insensitivity to the changeable geothermal field and fast-refreezing, piles have been widely used in permafrost regions on the Tibetan Plateau. The study of piles' thermostability is always a comprehensive problem and it refers to many aspects, for instance, heat transfer theory, geocryology, design of piles, pile-soil interaction and so on. Based on lots of academic papers, the research progress of piles' thermostability by field and model tests and theorical calculation are summarized and analyzed in this paper. The following conclusions can be drawn:the soil refreezing procedure is affected by a lot of aspects, among which concrete hydration heat is the most significant; with the global warming, permafrost degradation will aggravate apparently on the Tibetan Plateau in the next 50 years, which threatens the piles' thermostability and corresponding protection measures need to be taken.

Key words: piles' thermostability, soil refreezing procedure, climate change, protection measures, permafrost

中图分类号: 

  • U443.15