考虑通风与围岩条件的寒区隧道温度场模型及作用规律研究

doi:10.3973/j.issn.2096-4498.2019.S2.011

隧道建设（中英文） ›› 2019, Vol. 39 ›› Issue (S2): 85-91.DOI: 10.3973/j.issn.2096-4498.2019.S2.011

考虑通风与围岩条件的寒区隧道温度场模型及作用规律研究

于　丽^{1, 2}, 孙　源^{1, 2}, 王明年^{1, 2, ∗}, 夏鹏曦^{1, 2}, 王广科³

(1. 西南交通大学土木工程学院, 四川成都　610031; 2. 西南交通大学交通隧道工程教育部重点实验室, 四川成都　610031; 3. 中铁隧道集团一处有限公司, 重庆　401121)

收稿日期:2019-07-20 出版日期:2019-12-31 发布日期:2020-04-04
作者简介:于丽(1978—),女,辽宁大连人,2009 年毕业于西南交通大学,隧道及地下工程专业,博士,副教授,主要从事隧道及地下工程研究工作。E-mail: 22643123@ qq. com。 ?通信作者: 王明年, E-mail: 19910622@ 163. com。

Model and Action Law of Temperature Field of Tunnel in Cold Region Considering Ventilation and Surrounding Rock Condition

YU Li^{1, 2}, SUN Yuan^{1, 2}, WANG Mingnian^{1, 2,} ^∗, XIA Pengxi^{1, 2}, WANG Guangke³

(1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China 3. The First Construction Division Co., Ltd of China Railway Tunnel Group, Chongqing 401121, China)

Received:2019-07-20 Online:2019-12-31 Published:2020-04-04

摘要/Abstract

摘要：

为了解决寒区隧道温度场的预测问题,为寒区隧道抗冻设防提供指导,结合传热学、流体力学的基本方法,根据能量守恒原理,推导寒区隧道风流温度场的传热模型,并在此基础上,借助有限差分方法,探讨通风和围岩条件对寒区隧道温度场分布的作用规律。研究结果表明: 1)入口风温越低,风流速度越大以及断面越大,相同位置处洞内温度越低,这是由于进入洞内的冷空气更多,入口风温每降低5 ℃,同位置洞内风流温度平均降低3. 8 ℃; 2)风流温度决定了离壁面一定范围的围岩温度大小,风流温度越低,冻结深度与受到影响的围岩范围更大; 3)初始岩温越大,围岩温度分布曲线越陡峭,围岩导热系数则相反,且初始岩温每增加 5 ℃,冻结深度减少0. 24 m,受影响的围岩径向深度减少0. 32 m。

关键词: 隧道工程, 寒区隧道, 有限差分, 温度场

Abstract:

The prediction of tunnel temperature field in cold region is of great significance to the freeze-proofing of tunnel. As a result, the heat transfer model of the cold and wind tunnel temperature field is deduced based on the basic methods of heat transfer and fluid mechanics and principle of conservation of energy. And then the influence of ventilation and surrounding rock conditions on the temperature field distribution of tunnel in cold region is analyzed by finite difference method. The research results show that: (1) The lower the inlet wind temperature and the larger the wind velocity and cross-section, the lower the overall temperature inside the tunnel, which due to more cold wind; for every 5 ℃ decrease of inlet wind temperature, the average temperature of air flow inside the tunnel at the same position decreases by 3. 8 ℃. (2) The wind temperature determines the surrounding rock temperature in a certain range from the wall surface; the lower the air temperature, the greater the freezing depth and the affected surrounding rock range. (3) The initial temperature and thermal conductivity of surrounding rock determine the radial temperature distribution curve of surrounding rock; the larger the thermal conductivity of surrounding rock is, the flatter the temperature distribution curve is. Moreover, when the initial rock temperature increases by every 5 ℃, the freezing depth will decrease by 0. 24 m, and the radial depth of affected surrounding rock will decrease by 0. 32 m.

Key words: tunnel engineering, tunnel in cold region, finite difference, the temperature

中图分类号:

U 45

于丽, 孙源, 王明年, 夏鹏曦, 王广科. 考虑通风与围岩条件的寒区隧道温度场模型及作用规律研究[J]. 隧道建设, 2019, 39(S2): 85-91.

YU Li, SUN Yuan, WANG Mingnian, XIA Pengxi, WANG Guangke. Model and Action Law of Temperature Field of Tunnel in Cold Region Considering Ventilation and Surrounding Rock Condition[J]. Tunnel Construction, 2019, 39(S2): 85-91.

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考虑通风与围岩条件的寒区隧道温度场模型及作用规律研究

Model and Action Law of Temperature Field of Tunnel in Cold Region Considering Ventilation and Surrounding Rock Condition

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