›› 2018, Vol. 39 ›› Issue (5): 1625-1632.doi: 10.16285/j.rsm.2016.1357

• 基础理论与实验研究 • 上一篇    下一篇

基于温度场时空分布特征的寒区隧道冻胀模型

张玉伟1, 2,谢永利2,李又云2,赖金星2   

  1. 1. 西安建筑科技大学 土木工程学院,陕西 西安710055;2. 长安大学 公路学院,陕西 西安 710064
  • 收稿日期:2016-06-07 出版日期:2018-05-11 发布日期:2018-06-12
  • 作者简介:张玉伟,男,1989年生,博士后,主要从事岩土与隧道工程方面的研究工作。
  • 基金资助:

    交通运输部应用基础研究项目(No. 2015319812140);四川省交通厅科技项目(No. 2012C5-3)。

A frost heave model based on space-time distribution of temperature field in cold region tunnels

ZHANG Yu-wei1, 2, XIE Yong-li2, LI You-yun2, LAI Jin-xing2   

  1. 1. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an, Shaanxi 710055, China; 2. School of Highway, Chang’an University, Xi’an, Shaanxi 710064, China
  • Received:2016-06-07 Online:2018-05-11 Published:2018-06-12
  • Supported by:

    This work was supported by the Applied Basic Research Project (Main Subject) of the Ministry of Transport of China (2015319812140) and the Scientific Research Project of Transport Department of Sichuan Province (2012C5-3).

摘要: 寒区隧道冻胀力随时间和隧道进深呈三维时空分布,为建立描述冻胀力时空效应的简化模型,首先以某寒区隧道温度场测试成果为基础,建立了三维温度场模型,通过Stephen公式得到围岩冻结深度变化规律,以围岩冻结深度为参数,结合冻融圈整体冻胀模型和风化层冻胀模型建立了新的冻胀模型。分析结果表明:围岩冻结深度受温度场影响呈三维时空分布,随隧道进深逐渐减小,随时间呈弦函数变化;考虑风化层和破碎层建立冻胀模型,当冻结深度小于风化层厚度时,冻胀力只由风化层产生,冻结深度大于风化层厚度时,冻胀力由风化层和扰动层叠加产生;冻胀力时空分布规律与围岩冻结深度变化规律一致。

关键词: 寒区隧道, 温度场, 冻胀模型, 冻胀力, 时空分布

Abstract: Frost heaven force, related with tunnel axial length and time, has three dimensional space-time characteristics in cold region tunnels. In order to establish a frost heave model for studying the change rule of frost heaven force, three dimensional temperature field model of cold region tunnels was firstly established based on the field test results, and the changing law of surrounding rock frozen depth was obtained by Stephen formula. On this basis, a new temperature-frost heave model was established in combination with freeze-thaw circle theory and weathering layer theory. The results show that the frozen depth of surrounding rock influenced by environment temperature has a trend of decrease with the increase of tunnel axial length and changes periodically with time. According to this new model, when the frozen depth is smaller than the weathering layer depth, the frost heaven force is only induced by the weathering layer; when the frozen depth is bigger than the weathering layer depth, the frost heaven force in induced by both the weathering layer and freeze-thaw circle. The change rule of frost heaven force is similar with the change rule of surrounding rock frozen depth.

Key words: cold region tunnels, temperature field, frost heave model, frost heaven force, space-time distribution

中图分类号: 

  • U 452

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