[1]许 鹏,杨瑞松,刘平飞,等.寒区隧道衬背脱空积水冻胀对衬砌结构的影响及预测方法[J].长安大学学报(自然科学版),2025,45(4):107-117.[doi:10.19721/j.cnki.1671-8879.2025.04.009]
　XU Peng,YANG Rui-song,LIU Ping-fei,et al.Influence of water frost heave caused by tunnel lining back voids on tunnel lining structure in cold regions and prediction method[J].Journal of Chang’an University (Natural Science Edition),2025,45(4):107-117.[doi:10.19721/j.cnki.1671-8879.2025.04.009]
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寒区隧道衬背脱空积水冻胀对衬砌结构的影响及预测方法()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年4期
页码:
107-117
栏目:
桥梁与隧道工程
出版日期:
2025-07-30

文章信息/Info

Title:
Influence of water frost heave caused by tunnel lining back voids on tunnel lining structure in cold regions and prediction method
文章编号:
1671-8879(2025)04-0107-11
作者:
许 鹏; 杨瑞松; 刘平飞; 马振硕
(宁夏大学 土木与水利工程学院,宁夏 银川 750021)
Author(s):
XU Peng;  YANG Rui-song;  LIU Ping-fei;  MA Zhen-shuo
(School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, Ningxia, China)
关键词:
寒区隧道;  冻胀力;  数值模拟;  衬背脱空;  衬砌结构变形;  冻结段落预测
Keywords:
tunnel in cold region;  frost heave force;  numerical simulation;  lining back void;  lining structure deformation;  frost section prediction
分类号:
U25
DOI:
10.19721/j.cnki.1671-8879.2025.04.009
文献标志码:
A
摘要:
针对寒区隧道衬背脱空积水冻胀可能严重危害行车安全的问题,开展了考虑排泄条件的隧道衬背脱空积水冻结模拟试验,在试验中引入了地下水补给/排泄通道,明确了2类脱空积水冻胀机制; 使用数值模拟软件ANSYS建立了衬背脱空积水冻胀数值模型,揭示了脱空处冻胀力对衬砌结构承载特性的影响; 通过在虎峰岭隧道进行温度监测,得到了纵向温度分布,建立了衬背脱空底部温度求解模型,分析了衬砌表面与脱空底部温度的对应关系,提出了衬背脱空积水冻胀高发段落预测方法。研究结果表明:水的补给/排泄通道不冻结的脱空处不会产生冻胀力,通道先冻结的脱空处会产生较大冻胀力,当冻胀力大于围岩压力时,冻胀力会沿初期支护与二次衬砌的接触面释放,向压力较小的地方消散; 无冻胀力时隧道衬砌结构拱顶脱空中线部位的沉降最小,冻胀力对脱空部位的沉降有显著影响; 在隧道横断面上,距脱空中线部位越远,冻胀力引起的位移越小,在隧道纵向上则无明显差异; 随着脱空内冻胀力的增加,隧道衬砌结构会出现相对隆起以及与衬砌结构整体受力这2种受力状态,脱空部位混凝土则由全截面受压逐渐变为局部受拉; 当脱空底部日周期温度波动幅度在1 ℃以上,且以脱空底部温度-5 ℃作为脱空积水冻胀温度界限时,距隧道进口端约1 800 m处出现渗漏水的地方可能会发生衬背脱空积水冻胀,针对预测结果进行重点巡查,至少可以减少4/5的工作量。
Abstract:
For the problem that the water frost heave caused by tunnel lining back voids in cold regions might severely endanger driving safety, simulation tests considering drainage condition were conducted for water frost heave caused by tunnel lining back voids. With the groundwater supply/drainage channels introduced into the tests, two void water frost heave mechanisms were clarified. The numerical simulation software ANSYS was used to establish a numerical model of water frost heave caused by lining back voids. The influence of frost heave force at voids on the bearing characteristics of lining structures was revealed. Temperature monitoring was performed on the Hufengling Tunnel, the longitudinal temperature distribution was obtained, a temperature calculation model for the lining back void bottom was established, the corresponding relationship between lining surface temperature and void bottom temperature was analyzed, and a prediction method for high-occurrence sections of water frost heave caused by lining back voids was proposed. The research results indicate that voids with unfrozen water supply/drainage channels generate no frost heave force, while voids with first-frozen channels generate substantial frost heave force. When the frost heave force exceeds the surrounding rock pressure, it releases along the contact surface between primary support and secondary lining and dissipates toward areas with lower pressure. When no frost heave force exists, the minimum settlement occurs at the vault centerline of voids of tunnel lining structures. The frost heave force significantly affects the settlement at void locations. On tunnel cross sections, displacement decreases with the increasing distance from the void centerline, whereas no significant difference exists along the longitudinal direction. As the frost heave force increases within voids, the tunnel lining structure exhibits two stress states, namely relative uplift and integrated stress, and concrete at voids gradually changes from full-section compression to partial tension. When the daily temperature fluctuation amplitude at void bottom exceeds 1.0 ℃ and the void bottom temperature of -5 ℃ serves as the frost heave threshold, water leakage sites approximately 1 800 m from the tunnel entrance may lead to water frost heave caused by lining back voids. Focusing inspections based on the prediction results can reduce the workload by at least 4/5.3 tabs, 18 figs, 30 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-02-01
基金项目:宁夏自然科学基金项目(2024AAC03073); 国家自然科学基金项目(52368056)
作者简介:许 鹏(1986-),男,宁夏银川人,讲师,工学博士,E-mail:57426898@qq.com。
更新日期/Last Update: 2025-07-25