摘要
为进一步提高季冻区隧道保温层的保温性能,解决季冻区既有隧道冻害处治问题,本文依托吉图珲客运专线榆树川隧道,利用有限元软件FLUENT,对隧道保温钢波纹板套衬保温性能进行数值模拟,对施设保温钢波纹板套衬前后隧道横向、纵向温度场进行对比分析。结果表明:(1)在环境温度分别为-8℃、-13℃、-18℃的条件下,当隧道未施设保温钢波纹板套衬时,所有监测点均为负温,同时衬砌及围岩温度沿隧道纵向变化不大;(2)隧道局部施设保温钢波纹板套衬后,监测断面围岩温度提高至正温,且距监测断面左右各7.5 m范围二衬内表面均为正温(正温范围为15 m,保温钢波纹板套衬施设范围为12 m),温度影响范围约为50 m。采用保温钢波纹板套衬进行冻害整治是有效的,可将其应用于季冻区运营隧道严重冻害段的冻害处治工程中,可为类似工程提供参考。。
In order to further improve the thermal insulation performance of the tunnel insulation layer and solve the frost damage problem of the existing tunnel in the seasonal frozen area, this paper uses the finite element software FLUENT to simulate the thermal insulation performance of the corrugated steel plate liner for existing tunnel in the severe cold area based on the Yushuchuan tunnel of Jilin-Antu-Hunchun passenger dedicated line, and makes a comparative analysis on the transverse and longitudinal temperature fields of the tunnel before and after the construction of the corrugated steel plate liner. The results show that:(1) when the ambient temperature is-8℃,-13℃ and-18℃ respectively and the tunnel is not equipped with corrugated steel plate liner, all the monitoring points are negative temperature, and the temperature of lining and surrounding rock along the longitudinal direction of the tunnel has little change;(2) after the corrugated steel plate liner is installed in the local part of the tunnel, the surrounding rock temperature of the monitoring section is increased to the positive temperature, and the inner surface of the secondary lining within 7.5 m from the left and right of the monitoring section is the positive temperature(the positive temperature range is 15 m, the construction range of the corrugated steel plate liner is 12 m), and the temperature influence range is about 50 m. It is effective to use the corrugated steel plate liner for the treatment of freezing damage, which can be applied to the treatment of severe frost damage section of operation tunnel in the seasonal frozen area, and can provide reference for similar projects.
作者
李俊儒
王李斌
王雪来
侯占鳌
崔光耀
LI Junru;WANG Libin;WANG Xuelai;HOU Zhan'ao;CUI Guangyao(North China University of Technology,Beijing 100144,China;The First Construction Division Co.,Ltd.of China Railway Tunnel Group,Chongqing 401121,China)
出处
《高速铁路技术》
2019年第6期45-48,81,共5页
High Speed Railway Technology
基金
国家自然科学基金项目(51408008)
中铁隧道局集团科技创新计划项目(隧研合2018-11)
北京市大学生科学研究与创业行动计划项目(216051360019XN030)
北方工业大学大学生科技活动项目(110051360019XN140/002)
关键词
季冻区
隧道
防冻胀
钢波纹板套衬
温度场
seasonal frozen area
tunnel
anti-frost heave
corrugated steel plate liner
temperature field
