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冰川冻土 ›› 2016, Vol. 38 ›› Issue (6): 1607-1614.doi: 10.7522/j.issn.1000-0240.2016.0188

• 寒区科学与技术 • 上一篇    下一篇

寒冷地区输水渠道冻胀破坏链式分析及减灾研究

张如意, 姜海波, 王正成   

  1. 石河子大学 水利建筑工程学院, 新疆 石河子 832000
  • 收稿日期:2016-06-08 修回日期:2016-10-11 出版日期:2016-12-25 发布日期:2017-04-06
  • 通讯作者: 姜海波,E-mail:klaud_123@163.com E-mail:klaud_123@163.com
  • 作者简介:张如意(1992-),男,四川广安人,2014年毕业于石河子大学,现为石河子大学在读硕士研究生,从事水工结构抗冻胀方面的研究.E-mail:ruyizhang1992@163.com
  • 基金资助:

    国家自然科学基金项目(51408377;51269029);石河子大学杰出青年科技人才培育计划项目(2015ZRKXJQ06)资助

Frost heaving damage of water channel in cold regions: chain analysis and disaster mitigation research

ZHANG Ruyi, JIANG Haibo, WANG Zhengcheng   

  1. College of Water & Architectural Engineering, Shihezi University, Shihezi 832000, Xinjiang, China
  • Received:2016-06-08 Revised:2016-10-11 Online:2016-12-25 Published:2017-04-06

摘要:

寒冷地区输水渠道在运行过程中,由于持续负温的影响,地温逐步下降,引起渠基土体水分分布发生变化导致土体冻胀,致使输水渠道结构破坏,这种作用影响所表现出来的链式效应是冻胀破坏作用的重要特征。为了探明寒冷地区输水渠道冻胀破坏机理,分析渠道的冻胀破坏因素,引入链式破坏理论进行分析。从系统理论出发,分析冻胀破坏系统的链式关系结构,建立冻胀破坏链式效应关系模型。以寒冷地区渠道衬砌结构冻胀破坏为例,分析经过一个冻融周期,渠基土体颗粒、土体成分组成、气温、地温变化规律和土壤水分迁移规律对渠道衬砌结构冻胀破坏的影响。分析渠道衬砌结构冻胀破坏链式机理,是在外部环境气温、水分等条件输入下,地温分布受土体性质及土体水分的影响,土体水分迁移受地温和土体性质的作用,土体产生冻胀是对地温和水分分布作用的响应,以此为依据提出寒区渠道冻胀破坏断链减灾方法。

关键词: 链式效应关系, 渠道衬砌结构, 冻胀破坏因素, 断链减灾

Abstract:

In the operating process of water delivery channel in cold regions, due to continuous low temperature, the ground temperature declines gradually, resulting in change of the base soil moisture distribution and causing frost heaving, and then damaging the channel's structures. The chain effect is a significant characteristic of frost heaving damage. In order to analyze the channel's frost heaving damage mechanism and the factors of frost damage in cold regions, the destruction theory is applied. In this study, based on system theory, the frost heaving damage chain structure is analyzed, and a chain effect relation model of frost heaving damage is established. Taking the channel lining structure in cold regions damaged by frost heaving as an example, the effects on the frost heaving damage of channel lining structure of channel base soil particles, soil composition, air temperature and ground temperature changes and soil moisture migration after one freeze-thaw cycle are analyzed. The chain mechanism of frost heaving damage on channel lining structure is analyzed, which is under the external environment condition such as temperature, moisture, the distribution of ground temperature affected by soil properties and soil moisture. The soil moisture transfer is affected by the soil temperature and the soil properties; the soil frost heave is a response mechanism to the soil temperature and moisture distribution. Based on these relations, a broken disaster mitigation chain is proposed.

Key words: chain effect relationship, channel lining structure, frost heaving damage factors, broken disaster mitigation chain

中图分类号: 

  • TV698.2+6