[1]张加兵,李 镇,都荣环,等.运营期间寒区隧道围岩流变与损伤特征[J].长安大学学报(自然科学版),2025,45(4):81-94.[doi:10.19721/j.cnki.1671-8879.2025.04.007]
　ZHANG Jia-bing,LI Zhen,DU Rong-huan,et al.Rheological and damage characteristics of tunnel surrounding rock in cold regions during operation[J].Journal of Chang’an University (Natural Science Edition),2025,45(4):81-94.[doi:10.19721/j.cnki.1671-8879.2025.04.007]
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运营期间寒区隧道围岩流变与损伤特征()
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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:
81-94
栏目:
桥梁与隧道工程
出版日期:
2025-07-30

文章信息/Info

Title:
Rheological and damage characteristics of tunnel surrounding rock in cold regions during operation
文章编号:
1671-8879(2025)04-0081-14
作者:
张加兵1; 2; 李 镇1; 2; 都荣环1; 2; 赵向莲1; 2; 向 旭1; 2
(1. 广西大学 土木建筑工程学院,广西 南宁 530004; 2. 广西大学 工程防灾与结构安全教育部重点实验室,广西 南宁 530004)
Author(s):
ZHANG Jia-bing1; 2;  LI Zhen1; 2;  DU Rong-huan1; 2;  ZHAO Xiang-lian1; 2;  XIANG Xu1; 2
(1. School of Civil Engineering and Architecture, Guangxi University, Nanning 530004, Guangxi, China; 2. Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University, Nanning 530004, Guangxi, China)
关键词:
寒区隧道;  砂岩;  冻融循环;  三轴蠕变试验;  分数阶;  数值模拟
Keywords:
tunnel in cold region;  sandstone;  freeze-thaw cycle;  triaxial creep test;  fractional order;  numerical simulation
分类号:
U451
DOI:
10.19721/j.cnki.1671-8879.2025.04.007
文献标志码:
A
摘要:
为深入研究冻融循环作用下围岩流变与损伤特征,从而预测寒区软岩隧道运营期间产生的变形,基于寒区典型隧道工程开展了一系列砂岩冻融循环和三轴蠕变试验,分析了冻融循环次数对砂岩蠕变特性的影响,得到了在围压分别为3和6 MPa,冻融循环次数分别为0、20、40和60下砂岩蠕变全过程曲线; 基于分数阶导数理论推导出分数阶蠕变损伤模型,以反映砂岩在不同冻融循环期间各蠕变阶段的蠕变特性,并依据试验数据确定了分数阶蠕变损伤本构方程的参数; 将本构模型嵌入FLAC3D软件中,分析了冻融循环和长期荷载耦合作用下隧道围岩及支护结构的长期稳定性。研究结果表明:冻融循环次数越大,砂岩在同一长期荷载作用下的瞬时弹性变形、衰减蠕变和稳定蠕变速率也越大,所能承受的长期荷载等级越小; 现场监测数据与模型计算结果的误差为8.45%,验证了二次开发模型的可靠性; 随着冻融循环次数的增大,运营期间隧道围岩及支护结构的蠕变劣化效应更加严重,整体表现为向隧道内流变变形,其中拱顶和拱底变形最明显; 与不考虑冻融作用相比,经60次冻融循环后,隧道支护结构最大水平和竖向位移分别增加了2.68和2.07倍,说明冻融循环作用严重影响了隧道的长期稳定性及其安全运营。
Abstract:
To deeply study the rheological and damage characteristics of surrounding rock under freeze-thaw cycles and predict the deformation of soft rock tunnels in cold regions during operation, a series of sandstone freeze-thaw cycles and triaxial creep tests were carried out based on a typical tunnel project in cold regions. The influence of freeze-thaw cycle number on creep characteristics of sandstone was analyzed, and the whole process curves of sandstone creep under confining pressures of3 and 6 MPa and freeze-thaw cycles of 0, 20, 40 and 60 times were obtained. Based on the fractional derivative theory, the fractional creep damage model was derived to reflect the creep characteristics of sandstone in different creep stages during different freeze-thaw cycles, and parameters in the fractional creep damage constitutive equation were determined according to the test data. The constitutive model was embedded into the FLAC3D software to analyze the long-term stabilities of tunnel surrounding rock and supporting structure under the coupling effect of freeze-thaw cycles and long-term load. The research results show that the greater the freeze-thaw cycle number, the greater the instantaneous elastic deformation, attenuation creep and stable creep rates of sandstone under the same long-term load, and the smaller the long-term load level can be borne. The error between the on-site monitoring data and the model calculation results is 8.45%, verifying the reliability of the secondary development model. With the increase in freeze-thaw cycle number, the creep effects of tunnel surrounding rock and supporting structure are more serious during operation, and the overall performance is rheological deformation in the tunnel, among which the deformations of vault and arch bottom are the most obvious. After 60 freeze-thaw cycles, the maximum horizontal and vertical displacements of tunnel support structure increase by 2.68 and 2.07 times, respectively, indicating that the freeze-thaw cycles seriously affect the long-term stability and safe operation of the tunnel compared with those without considering the freeze-thaw effect.4 tabs, 17 figs, 34 refs.

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相似文献/References:

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　WU Yi min,XU Peng,HUANG Le,et al.Progressive deterioration of tunnel lining in seasonal freezingzone and its engineering influence[J].Journal of Chang’an University (Natural Science Edition),2021,41(4):63.
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备注/Memo

备注/Memo:
收稿日期:2025-02-11
基金项目:国家自然科学基金项目(52108367); 广西自然科学基金项目(2023GXNSFBA026260)
作者简介:张加兵(1991-),男,江西贵溪人,副教授,工学博士,E-mail:zhang.j.b@gxu.edu.cn。
更新日期/Last Update: 2025-07-25