[1]程涛,张东明,孙福申,等.季冻区山岭公路隧道冻胀力学特征数值模拟研究[J].自然灾害学报,2018,(04):034-40.[doi:10.13577/j.jnd.2018.0405]
 CHENG Tao,ZHANG Dongming,SUN Fushen,et al.Numerical simulation of mechanical characteristics of mountain road tunnel under frost heaving in seasonal frozen region[J].,2018,(04):034-40.[doi:10.13577/j.jnd.2018.0405]
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季冻区山岭公路隧道冻胀力学特征数值模拟研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年04期
页码:
034-40
栏目:
出版日期:
2018-09-28

文章信息/Info

Title:
Numerical simulation of mechanical characteristics of mountain road tunnel under frost heaving in seasonal frozen region
作者:
程涛1 张东明12 孙福申3 黄宏伟12
1. 同济大学 地下建筑与工程系, 上海 200092;
2. 同济大学 岩土及地下工程教育部重点实验室, 上海 200092;
3. 吉林省交通科学研究所, 吉林 长春 130012
Author(s):
CHENG Tao1 ZHANG Dongming12 SUN Fushen3 HUANG Hongwei12
1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China;
2. Key Laboratory of Geotechnical and Underground Engineering, Ministry of Education, Tongji University, Shanghai 200092, China;
3. Jilin Provincial Transport Scientific Research Institute, Changchun 130012, China
关键词:
季冻区公路隧道温度场模拟冻胀监测布设
Keywords:
seasonal frozen regionroad tunneltemperature field simulationfrost heavingmonitoring layout
分类号:
X9;X43;U45;TU445
DOI:
10.13577/j.jnd.2018.0405
摘要:
季冻区的极端低温气候严重威胁着隧道的运营安全,围岩的冻胀作用是隧道冻害发生的外力根源。以吉林省某高速公路隧道为例,基于伴有相变的瞬态传热理论和abaqus有限元模型模拟了围岩冻结温度场动态分布规律以及围岩冻胀后的衬砌内力及变形特征。计算结果表明围岩冻结从拱部开始发生,发展至边墙,最后延伸至仰拱底部形成冻结圈;冻结深度的分布规律为拱部>边墙>仰拱;冻结发展速度与气温变化相关,但表现出一定的滞后性。围岩冻胀后,衬砌整体呈现"横鸭蛋"的收缩变形趋势,边墙水平收敛和仰拱不均匀隆起影响最大,边墙与仰拱连接处出现的应力集中也可能会影响结构整体的稳定性。此外,冻胀引起的衬砌转角变形在距离拱顶48°和96°处达到正负峰值,可视为冻胀敏感点作为转角监测的最优布设点。
Abstract:
The extreme low-temperature climate in the seasonal frozen region seriously threatens the operational safety of the tunnel, and the frost heaving effect of surrounding rocks is the external source for the tunnel’s freezing damage. Taking a highway tunnel in Jilin Province as an example, the dynamic distribution law of the surrounding rock freezing temperature field was simulated based on the transient heat transfer theory with phase transition. And the internal force and deformation characteristics of lining under frost heaving was calculated by using abaqus FEM model. The calculation results showed that the freezing of the surrounding rock started from the arch, developed to the side wall, and finally extended to the bottom of the inverting arch to form a frozen ring; the law of frozen depth distribution presented arch > sidewall > inverted arch; the freezing development speed was related to the change of temperature, and showed some hysteresis. After frost heaving of surrounding rock, the lining deformation exhibits the shrinkage trend of "horizontal duck egg", and the side wall convergence with uneven uplift of the inverted arch were impacted most, the stress concentration at the connection between the side wall and the inverting arch may affect the overall stability of the structure. In addition, the rotation of lining structure reached positive and negative peaks at 48° and 96° from the vault, which can be regarded as the sensitivity point under frost heaving, and can be selected as the best point for rotation monitoring.

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备注/Memo

备注/Memo:
收稿日期:2018-05-01;改回日期:2018-05-26。
基金项目:吉林省交通运输科技计划项目(2015/1/18);国家自然科学基金项目(51278381)
作者简介:程涛(1995-),男,硕士研究生,主要从事隧道工程健康监测与评估研究.E-mail:1630299@tongji.edu.cn
通讯作者:黄宏伟(1966-),男,教授,博士,主要从事隧道结构健康监测与检测、地下工程风险评估、预警与控制方面的研究工作.E-mail:huanghw@tongji.edu.cn
更新日期/Last Update: 1900-01-01