Deformation characteristics of surrounding rock and support stress in tunnels crossing fault fracture zones
WEI Jian1, CHANG Weixue1,2*, LIANG Qingguo2, QI Liangbin1, LI Qiwei2
1. Gansu Shunda Road and Bridge Construction Co., Ltd., Lanzhou 730050, Gansu, China; 2. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China; 3. Gansu Highway Traffic Construction Group Co., Ltd., Lanzhou 730030, Gansu, China
Abstract: To address the problem of large deformation of surrounding rock in tunnels crossing fault fracture zones, the Heimaguan Tunnel in Gansu was taken as the engineering background. Based on the field monitoring data of surrounding rock pressure, crown settlement, and horizontal convergence obtained from 23 monitoring sections, the deformation evolution characteristics of the surrounding rock and the mechanical behavior of the supporting structures were systematically analyzed.The results showed that significant deformation occurred in the fault fracture zone section. The maximum unilateral horizontal convergence reached 787.7 mm, while the maximum crown settlement reached 472.6 mm, exhibiting typical characteristics of large deformation in fault fracture zones. The deformation and pressure of the surrounding rock exhibited significant spatial discreteness, with the coefficients of variation of crown settlement and horizontal convergence reaching 83.2% and 93.0%, respectively, indicating the highly heterogeneous nature of the surrounding rock within the fault fracture zone. During the construction stage, the load-sharing ratio of the secondary lining ranged from 5.18% to 38.46%, with an average 20.29%, indicating that the surrounding rock load was mainly borne by the primary support, while approximately 20% of the load was carried by the secondary lining. Under the coupled effects of high in-situ stress, bedding-controlled structure, and groundwater softening, the surrounding rock deformation and support stress exhibited pronounced spatial non-uniformity. The research results can be referred to for the control of large deformation and the support design of similar tunnels crossing fault fracture zones.
魏健,常伟学,梁庆国,祁亮斌,李奇伟. 断层破碎带隧道围岩变形及支护受力特征[J]. 隧道与地下工程灾害防治, 2026, 8(2): 32-42.
WEI Jian, CHANG Weixue, LIANG Qingguo, QI Liangbin, LI Qiwei. Deformation characteristics of surrounding rock and support stress in tunnels crossing fault fracture zones. Hazard Control in Tunnelling and Underground Engineering, 2026, 8(2): 32-42.
[1] 杨建辉, 沈恺, 周杰, 等. 穿越富水断层破碎带隧道塌方机理分析与预防[J]. 工程地质学报, 2023, 31(1): 248-257. YANG Jianhui, SHEN Kai, ZHOU Jie, et al. Mechanism and prevention of tunnel collapse through water-rich fault fracture zone[J]. Journal of Engineering Geology, 2023, 31(1): 248-257. [2] 刘高, 张帆宇, 李新召, 等. 木寨岭隧道大变形特征及机理分析[J]. 岩石力学与工程学报, 2005(增刊2): 5521-5526. LIU Gao, ZHANG Fanyu, LI Xinzhao, et al. Research on large deformation and its mechanism of Muzhailing Tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2005(Suppl.2): 5521-5526. [3] 刘志春, 李文江, 孙明磊, 等. 乌鞘岭隧道F4断层区段监控量测综合分析[J]. 岩石力学与工程学报, 2006, 25(7): 1502-1511. LIU Zhichun, LI Wenjiang, SUN Minglei, et al. Monitoring and comprehensive analysis in F4 section of Wuqiaoling Tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(7): 1502-1511. [4] 王东剑. 隧道穿越断层带围岩超前小导管预加固措施参数研究[J]. 公路, 2022, 67(6): 395-400. [5] 颉永斌, 董建华. 断层破碎带内隧道纵向受荷特征和变形分析[J]. 中国公路学报, 2021, 34(11): 211-224. XIE Yongbin, DONG Jianhua. Analysis of longitudinal deformation and stress characteristics of tunnel crossing fault fracture zone[J]. China Journal of Highway and Transport, 2021, 34(11): 211-224. [6] 王宝东,赵文,王鑫,等.断层影响下隧道受荷特征及围岩变形研究[J]. 公路, 2023, 68(10):343-349. WANG Baodong, ZHAO Wen, WANG Xin, et al. Research on the load characteristics of tunnels under the influence of faults and the deformation of surrounding rocks[J]. Highway, 2023, 68(10):343-349. [7] 张帆舸, 黄昌富, 李文兵, 等. 新乌鞘岭隧道穿越断层破碎带施工关键技术研究[J]. 现代隧道技术, 2024, 61(增刊1): 1027-1038. ZHANG Fange, HUANG Changfu, LI Wenbing, et al. Key technology of fault and fractured zone in New Wushaoling Tunnel construction[J]. Modern Tunnelling Technology, 2024, 61(Suppl.1): 1027-1038. [8] 万飞, 谭忠盛, 马栋. 关角隧道F2-1断层破碎带支护结构优化设计[J]. 岩石力学与工程学报, 2014, 33(3): 531-538. WAN Fei, TAN Zhongsheng, MA Dong. Optimizing design of support structure for Guanjiao Tunnel in fault-rupture zone F2-1[J]. Chinese Journal of Rock Mechanics and Engineering, 2014, 33(3): 531-538. [9] 丁远振, 谭忠盛, 马栋. 高地应力断层带软岩隧道变形特征与控制措施研究[J]. 土木工程学报, 2017, 50(增刊1): 129-134. DING Yuanzhen, TAN Zhongsheng, MA Dong. Study on large deformation characteristics and control measures of soft rock tunnel in fault zone with high geostress[J]. China Civil Engineering Journal, 2017, 50(Suppl.1): 129-134. [10] 刘银,张志强, 赵梓彤, 等. 断层破碎带在渗流作用下应力特征及控制[J]. 地下空间与工程学报, 2019, 15(3):820-826. LIU Yin, ZHANG Zhiqiang, ZHAO Zitong, et al. The stress characteristics and control of fault zone under the action of seepage flow[J]. Chinese Journal of Underground Space and Engineering, 2019, 15(3): 820-826. [11] 马栋, 闫肃, 王武现. 赣深高铁龙南隧道大型富水断层破碎带施工技术[J].隧道建设(中英文), 2020, 40(11): 1634-1641. MA Dong, YAN Su, WANG Wuxian. Construction technology of large-scale water-rich fault and fractured zone in Longnan Tunnel on Jiangxi-Shenzhen high-speed railway[J]. Tunnel Construction, 2020, 40(11): 1634-1641. [12] 蔡遵乐, 梁庆国, 曹生慧, 等. 高地应力软岩隧道的变形规律[J]. 隧道与地下工程灾害防治, 2023, 5(4): 21-32. CAI Zunle, LIANG Qingguo, CAO Shenghui, et al. The deformation pattern of soft rock tunnels with high ground stress[J]. Hazard Control in Tunnelling and Underground Engineering, 2023, 5(4): 21-32. [13] 陈孔福, 申玉生, 赵何霖, 等. 基于破碎带围岩变形受力特征的偏压隧道控制措施研究[J]. 工程地质学报, 2025, 33(2): 621-631. CHEN Kongfu, SHEN Yusheng, ZHAO Helin, et al. Study on control measures in bias tunnel based on deformation and mechanics characteristics of surrounding rock in fracture zone[J]. Journal of Engineering Geology, 2025, 33(2): 621-631. [14] 杨立, 夏增选, 娄文杰, 等. 山区深埋公路隧道穿越断层破碎带施工稳定性[J]. 隧道与地下工程灾害防治, 2024, 6(3): 32-42. YANG Li, XIA Zengxuan, LOU Wenjie, et al.Construction stability of deeply buried highway tunnel through fault fracture zones in mountainous areas[J]. Hazard Control in Tunnelling and Underground Engineering, 2024, 6(3): 32-42. [15] 杨拯. 断层破碎带影响下山岭隧道施工力学行为研究[D]. 成都: 西南交通大学, 2012: 7-13. YANG Zheng. Study on the mountains tunnel construction mechanical under the infuluence of fault fracture zone[D]. Chengdu: Southwest Jiaotong University, 2012:7-13. [16] 常伟学, 梁庆国, 李奇伟, 等. 富水千枚岩隧道大变形特征及控制措施研究[J]. 现代隧道技术, 2024, 61(3): 236-244. CHANG Weixue, LIANG Qingguo, LI Qiwei, et al. Study on large deformation characteristics and control measures of water-rich phyllite rock tunnels[J]. Modern Tunnelling Technology, 2024, 61(3): 236-244. [17] 中华人民共和国住房和城乡建设部, 中华人民共和国国家质量监督检验检疫总局. 工程岩体分级标准:GB/T 50218—2014[S]. 北京: 中国计划出版社, 2014:10-12. [18] 中华人民共和国交通运输部. 公路隧道施工技术规范:JTG/T 3660—2020[S]. 北京: 人民交通出版社股份有限公司, 2020:43. [19] 国家铁路局. 铁路富水隧道技术规程:TB 10123—2025[S]. 北京: 中国铁道出版社, 2025:6.
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