考虑隔热层的寒区隧道围岩温度径向传播规律及相关参数研究

doi:10.3973/j.issn.1672-741X.2016.07.005

隧道建设（中英文） ›› 2016, Vol. 36 ›› Issue (7): 800-805.DOI: 10.3973/j.issn.1672-741X.2016.07.005

考虑隔热层的寒区隧道围岩温度径向传播规律及相关参数研究

李又云¹，张玉伟^1,*，张志耕²

(1.长安大学特殊地区公路工程教育部重点实验室，陕西西安 710064；  2.内蒙古高等级公路建设开发有限责任公司，内蒙古呼和浩特 010051)

收稿日期:2015-12-14 修回日期:2016-03-23 出版日期:2016-07-20 发布日期:2016-07-27
作者简介:李又云(1973—)，男，山东聊城人，2000年毕业于长安大学，岩土工程专业，博士，副教授，主要从事岩土与隧道工程方面的教学与研究工作。Email: liyouyun2006@163.com。*通讯作者：张玉伟， Email： 1032659676@qq.com。
基金资助:
内蒙古自治区交通厅科技项目(NJ200702)；交通运输部应用基础研究项目（2015319812140）

Study of Radial Propagation Laws of Surrounding Rocks  Temperature Considering Thermal Insulation Layer of Tunnel  in Cold Regions and Their Relevant Parameters

LI Youyun¹, ZHANG Yuwei^{1, *}, ZHANG Zhigeng²

(1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University,  Xi’an 710064, Shaanxi, China; 2. Inner Mongolia FirstClass Highway Construction Development Limited Liability  Company, Huhhot 010051, Inner Mongolia, China)

Received:2015-12-14 Revised:2016-03-23 Online:2016-07-20 Published:2016-07-27

摘要/Abstract

摘要：

寒区隧道围岩径向温度传播规律对隧道保温设计具有重要的指导意义。目前寒区温度场的研究多为现场实测与理论分析2个方面。为得到寒区隧道支护结构与围岩温度沿径向变化的规律，自行研制了温度模拟足尺试验仪器，并在此基础上开展了无隔热层与有隔热层2种条件下的模拟试验，分析了隧道围岩径向温度场变化规律。结果表明：模拟环境温度为-12.5 ℃条件下，无隔热层时，90 h时环境温度降到-9 ℃，初喷混凝土层与围岩的交界面处的温度降低至0 ℃，当温度进一步降低时，围岩出现冻结状态，且随着时间的推移，冻结范围逐步扩大，192 h时环境温度降低到-12.5 ℃，各界面温度基本达到稳定；设置4.5 cm隔热层时，由于隔热层作用，450 h时支护结构混凝土及围岩内的温度均大于0 ℃。结合试验最后确定了隔热层、隧道支护混凝土与围岩的导热系数与导温系数，结果可为寒区隧道保温设计提供依据。

关键词: 寒区隧道, 径向温度场, 隔热层, 传播规律, 模型试验

Abstract:

Radial propagation of temperature field of surrounding rocks of tunnel in cold regions is the key to design of thermal insulation. The study of temperature field of surrounding rocks of tunnel in cold regions focuses on site monitoring and theoretical analysis. Full scale testing device for temperature simulation is developed, on basis of which simulation tests with and without thermal insulation layer are carried out; and the radial propagation laws of temperature of surrounding rocks and support structure of tunnel in cold regions are analyzed. The study results show that: 1) The temperature of contact face between primary shotcrete and surrounding rocks is 0 ℃ after 90 h under the conditions of environmental temperature of -9℃ and no thermal insulation layer; and the surrounding rocks froze when the temperature keeps going down. The temperatures of every interface of structure become stable after 192 h and under condition of stable environment temperature of -12.5 ℃. 2) The internal temperatures of support structure and concrete are larger than 0 ℃ after 450 h under the conditions of environmental temperature of -12.5 ℃ and thermal insulation layer of 4.5 cm thickness. 3) The thermal conductivity and the thermal diffusivity of the thermal insulation layer, support concrete and surrounding rocks of the tunnel are determined. The results can provide reference for thermal insulation design of tunnels in cold region.

Key words: tunnel in cold region, radial temperature field, thermal insulation layer, propagation law, model test

中图分类号:

U 45

李又云，张玉伟，张志耕. 考虑隔热层的寒区隧道围岩温度径向传播规律及相关参数研究[J]. 隧道建设, 2016, 36(7): 800-805.

LI Youyun, ZHANG Yuwei, ZHANG Zhigeng. Study of Radial Propagation Laws of Surrounding Rocks  Temperature Considering Thermal Insulation Layer of Tunnel  in Cold Regions and Their Relevant Parameters[J]. Tunnel Construction, 2016, 36(7): 800-805.

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考虑隔热层的寒区隧道围岩温度径向传播规律及相关参数研究

Study of Radial Propagation Laws of Surrounding Rocks  Temperature Considering Thermal Insulation Layer of Tunnel  in Cold Regions and Their Relevant Parameters

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