Abstract: To accurately evaluate the safety state of tunnel lining cracked sections, optimize structural design, and determine maintenance timing scientifically, a stability evaluation system was established in this study by integrating fracture mechanics with the ultimate bearing capacity theory. Numerical simulations were employed to systematically calculate the safety coefficients for three key lining parts—namely, the vault, haunch, and side wall—under varying crack depths. A dual-index system, comprising the stability coefficient P (indicating crack stability)and the bearing capacity safety coefficient K (assessing whether the sectional bearing capacity meets requirements), was introduced to analyze the influence mechanisms of various factors on structural safety. The results showed that the post cracking stability of the lining was primarily governed by two factors: first, whether the cracks continued to propagate, and second, the weakening of bearing capacity resulting from the reduction in effective section thickness due to cracking. Furthermore, cracking in one location was found to have a negligible impact on the bearing capacity safety coefficient of other locations, confirming the independence of local crack assessment. Critical crack depths and angles corresponding to different damage grades were also identified. This study provides a quantitative basis for the safety evaluation of tunnel lining cracks, offering valuable references for optimizing structural design theory and scientifically planning maintenance schedules.
陈志敏, 师浩博, 张润龙, 黎俊鸿, 路帅, 谈成龙. 基于裂缝形状与特征的衬砌结构开裂截面稳定性评估[J]. 隧道与地下工程灾害防治, 2026, 8(1): 13-21.
CHEN Zhimin, SHI Haobo, ZHANG Runlong, LI Junhong, LU Shuai, TAN Chenglong. Stability evaluation of cracked section of lining structure based on crack shape and characteristics. Hazard Control in Tunnelling and Underground Engineering, 2026, 8(1): 13-21.
[1] MEGUID M A, DANG H K. The effect of erosion voids on existing tunnel linings[J]. Tunnelling and Underground Space Technology, 2009, 24(3): 278-286. [2] 罗建春, 高菊如. 既有线铁路隧道病害分级方法与评价体系研究[J]. 现代隧道技术, 2016, 53(6): 12-17. LUO Jianchun, GAO Juru. A defect classification and evaluation system for existing railway tunnels[J]. Modern Tunnelling Technology, 2016, 53(6): 12-17. [3] XU Z L, CHEN J X, LUO Y B, et al. Geomechanical model test for mechanical properties and cracking features of large-section tunnel lining under periodic temperature[J]. Tunnelling and Underground Space Technology, 2022, 123: 104319. [4] LIU H, LIU J C. Brief introduction to the collection and identification methods of tunnel lining cracks [J]. International Core Journal of Engineering, 2024, 10(2): 193-201. [5] HAMIDIA M, AFZALI M, JAMSHIDIAN S, et al. Post-earthquake stiffness loss estimation for reinforced concrete columns using fractal analysis of crack patterns[J]. Structural Concrete, 2023, 24(3): 3933-3951. [6] XIAO J Z, DAI F C, WEI Y Q, et al. Cracking mechanism of secondary lining for a shallow and asymmetrically-loaded tunnel in loose deposits[J]. Tunnelling and Underground Space Technology, 2014, 43: 232-240. [7] LIU Y Y, LAI H P, XIE Y L, et al. Cracks analysis of highway tunnel lining in flooded loess[J]. Proceedings of the Institution of Civil Engineers-Geotechnical Engineering, 2017, 170(1): 62-72. [8] XU G W, HE C, CHEN Z Q, et al. Mechanical behavior of secondary tunnel lining with longitudinal crack[J]. Engineering Failure Analysis, 2020, 113: 104543. [9] CHIAIA B, FANTILLI A P, VALLINI P. Evaluation of crack width in FRC structures and application to tunnel linings[J]. Materials and Structures, 2009, 42(3): 339-351. [10] 谭社会, 李再帏, 时瑾, 等. 线路纵断面设置对千米级高铁悬索桥动力学行为的影响[J]. 中国铁道科学, 2021, 42(6): 58-67. TAN Shehui, LI Zaiwei, SHI Jin, et al. Influence of track profile setting on dynamic behavior of high-speed railway suspension bridge with kilometer span[J]. China Railway Science, 2021, 42(6): 58-67. [11] 余龙文. 层状围岩流变荷载作用下隧道二次衬砌裂损特征[J]. 铁道建筑, 2021, 61(12): 127-132. YU Longwen. Crack characteristics of tunnel secondary lining under rheological load of layered surrounding rock[J]. Railway Engineering, 2021, 61(12): 127-132. [12] MEGUID M A, DANG H K. The effect of erosion voids on existing tunnel linings[J]. Tunnelling and Underground Space Technology, 2009, 24(3): 278-286. [13] LEE D H, LEE H K, KIM Y G. A study on mechanical behavior and cracking characteristics of tunnel lining by model experiment[J]. Geosystem Engineering, 2002, 5(4): 104-112. [14] BRIFFAUT M, BENBOUDJEMA F, D'ALOIA L. Effect of fibres on early age cracking of concrete tunnel lining(part II: numerical simulations)[J]. Tunnelling and Underground Space Technology, 2016, 59: 221-229. [15] WANG Z, MAEKAWA K. Lifetime assessment of structural concrete-multi-scale integrated hygro-thermal-chemo-electrical-mechanistic approach and statistical evaluation[J]. Structure and Infrastructure Engineering, 2022, 18(7): 933-949. [16] 王大鹏. 既有铁路隧道衬砌开裂力学行为及服役可靠性[D]. 石家庄:石家庄铁道大学, 2024: 67-76. WANG Dapeng. Mechanical behavior and service reliability of existing railway tunnel lining cracks [D]. Shijiazhuang:Shijiazhuang Tiedao University, 2024: 67-76. [17] 郭德平, 刘语泉, 黄兴. 变截面隧道施工方式与支护结构参数敏感性分析[J]. 路基工程, 2025(3): 175-181. GUO Deping, LIU Yuquan, HUANG Xing. Analysis on sensitivity of construction mode and supporting structure parameters of variable cross-section tunnel[J]. Subgrade Engineering, 2025(3): 175-181. [18] BURATTI N, FERRACUTI B, SAVOIA M. Concrete crack reduction in tunnel linings by steel fibre-reinforced concretes[J]. Construction and Building Materials, 2013, 44: 249-259. [19] LIU D J, HUANG H W, YUE Q R, et al. Behaviour of tunnel lining strengthened by textile-reinforced concrete[J]. Structure and Infrastructure Engineering, 2016, 12(8): 964-976. [20] WANG Y F, JIN J, WAN Z Y, et al. Crack characteristics and safety prediction for the lining of a typical tunnel located in a seismic area[J]. Mechanics of Solids, 2021, 56(6): 1103-1113. [21] KUMAR A, CHAUHAN V B. Numerical investigation and design recommendations for steel linings in single and multiple tunnels under surcharge loading[J]. Geotechnical and Geological Engineering, 2025, 43(8): 457. [22] RAEISI R, REZAIE F, ALIHA M R M. Mixed mode Ⅰ/Ⅱ and Ⅰ/Ⅲ fracture toughness investigation for preplaced aggregate concrete mixtures: experimental study and theoretical prediction[J]. Fatigue & Fracture of Engineering Materials & Structures, 2024, 47(8): 2873-2887. [23] 中铁二院工程集团有限责任公司. 铁路隧道设计规范: TB10003—2016[S]. 北京:中国铁道出版社, 2016: 85-90. [24] 招商局重庆交通科研设计院有限公司. 公路隧道设计规范: JTG 3370.1—2018[S]. 北京:人民交通出版社股份有限公司, 2018: 102-110.
2026, Vol. 8 
