曲线寒区隧道保温层铺设长度计算方法研究

王志杰; 姜逸帆; 李金宜; 蒋新政; 周平; 雷飞亚

doi:10.3973/j.issn.2096-4498.2021.02.003

隧道建设 >

2021 , Vol. 41 >Issue 2: 175 - 184

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.02.003

研究与探索

曲线寒区隧道保温层铺设长度计算方法研究

王志杰 ,
姜逸帆 ,
李金宜 ,
蒋新政 ,
周平 ,
雷飞亚

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(1. 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； 2. 西南交通大学土木工程学院，四川成都 610031)

王志杰(1964—)，男，山西万荣人，1987年毕业于西南交通大学，隧道及地下工程专业，博士，教授，主要从事山岭隧道的理论与实践研究工作。E-mail: 1049814641@qq.com。*通信作者：周平， E-mail: zhouping_swjtu@foxmail.com。

网络出版日期: 2021-03-05

基金资助

国家自然科学基金(51678498)；教育部创新团队发展计划（IRT0955）

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Calculation Method for Laying Length of Highway Tunnel Insulation Layer in Cold Area

WANG Zhijie ,
JIANG Yifan ,
LI Jinyi ,
JIANG Xinzheng ,
ZHOU Ping ,
LEI Feiya

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(1. Key Laboratory of Transportation Tunnel Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)

Online published: 2021-03-05

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摘要

为探究隧道曲率对保温层设计以及隧道纵向温度场分布的影响，以河北延崇高速金家庄隧道为研究对象，采用理论推导、CFD模拟的方法探讨隧道曲率对寒区隧道温度场分布特征的影响，并推导出不同曲率下的隧道保温层铺设长度计算方法。研究结果表明： 1)隧道的曲率造成了隧道内空气的非对称流动，进而造成隧道左右侧对流换热不对称，以及温度分布的不对称，且曲率越大，非对称现象越明显； 2)隧道内外侧的边界层空气速度差异随曲率的增大而增大，由于离心力造成的偏移效应在隧道进洞深度150 m处出现并迅速达到稳定； 3)提出的保温层铺设长度计算公式考虑了曲率造成的隧道内温度非对称现象，可用于计算不同曲率隧道的保温层铺设长度。

关键词： 曲线隧道; 寒区隧道; 保温层铺设长度; CFD模拟; 理论推导

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王志杰 , 姜逸帆 , 李金宜 , 蒋新政 , 周平 , 雷飞亚 . 曲线寒区隧道保温层铺设长度计算方法研究[J]. 隧道建设, 2021 , 41(2) : 175 -184 . DOI: 10.3973/j.issn.2096-4498.2021.02.003

Abstract

The influence of tunnel curvature on the design of the insulation layer and the longitudinal temperature field of the Jinjiazhuang tunnel of the YanqingChongli expressway in Hebei, China is discussed using theoretical derivation and computational fluid dynamics simulation methods; moreover, calculation methods for the laying length of the insulation layer under different tunnel curvatures are proposed. The research results show the following. (1) The curvature of the tunnel causes an asymmetric flow of air in the tunnel, which further causes an asymmetric convection heat transfer on the left and righthand sides of the tunnel, and an asymmetric temperature distribution. The greater the curvature, the more serious the asymmetry. (2) The air velocity difference in the boundary layer inside and outside the tunnel increases with increasing curvature, and the offset effect caused by centrifugal force appears 150 m away from the tunnel entrance and quickly stabilizes. (3) The temperature asymmetry in the tunnel caused by the curvature is considered in the proposed formula for calculating the length of the insulation layer, and the formula can be used to calculate the laying length of the insulation layer of the tunnel with various curvatures.

Key words： curved tunnel; tunnel in cold area; laying length of insulation layer; computational fluid dynamics simulation; theoretical derivation

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