穿越走滑断层深埋隧洞群围岩力学响应与布置方案优化

doi:10.3973/j.issn.2096-4498.2026.10.007

隧道建设（中英文） ›› 2026, Vol. 46 ›› Issue (10): 2147-2162.DOI: 10.3973/j.issn.2096-4498.2026.10.007

穿越走滑断层深埋隧洞群围岩力学响应与布置方案优化

管国荥^{1, 2}，龙腾^{1, 2}，崔臻^{1, 2,*}，盛谦^{1, 2}

(1. 中国科学院武汉岩土力学研究所岩土力学与工程安全全国重点实验室，湖北武汉 430071； 2. 中国科学院大学工程科学学院，北京 100049)

出版日期:2026-10-20 发布日期:2026-10-20
作者简介:管国荥（2001—），男，山东泰安人，中国科学院大学土木工程专业在读博士，研究方向为隧道与地下工程方面的研究。E-mail: guanguoxing23@mails.ucas.ac.cn。*通信作者：崔臻， E-mail: zcui@whrsm.ac.cn。

Mechanical Response and Spacing Optimization of Tunnel Complexes Crossing Strike-Slip Fault

GUAN Guoxing^{1, 2}, LONG Teng^{1, 2}, CUI Zhen^{1, 2, *}, SHENG Qian^{1, 2}

(1. State Key Laboratory of Geomechanics and Geotechnical Engineering Safety, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China; 2. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China)

Online:2026-10-20 Published:2026-10-20

摘要/Abstract

摘要： 为解决穿越活动走滑断层深埋隧洞群的安全建设问题，采用模型试验与数值模拟相结合的方法，对穿越活动走滑断层隧洞群的围岩力学响应及隧洞间净距判定开展研究。首先，根据模型试验中洞群应变分布特征、洞间岩体破裂形态与应力分布特征论证开展过断层隧洞群净距研究的必要性；然后，通过数值模拟分析不同因素对过走滑断层隧洞群围岩力学响应的影响规律；最后，基于多组数值模拟结果，以塑性区分布为定性指标，以隧洞洞壁位移与屈服接近指数分布为定量指标，对过走滑断层隧洞群的最小净距进行判定，同时分析不同因素对最小净距的影响规律。结果表明： 1）断层错动会显著加剧相邻隧洞之间的相互作用，与单洞相比，双洞围岩破裂形态更加复杂，A洞和B洞的拉应变峰值与单洞相比分别增加35.12%和32.75%，压应变峰值分别增加87.50%和37.00%； 2）隧洞群围岩损伤具有随错动量增大而持续累积和扩展的特征； 3）洞间岩墙是维护隧洞群整体稳定的关键承载部位，直接影响隧洞群的整体稳定性； 4）针对断层带围岩力学等级低、隧洞埋深较深或断层倾角相对较缓的区域，应采用较大的洞净距布置方案，提升隧洞结构的安全性。

关键词: 隧洞群, 走滑断层, 隧洞净距, 模型试验, 数值模拟, 断层倾角

Abstract: To ensure the safe construction of tunnel complexes crossing active faults, physical model tests and numerical simulations are used to investigate the mechanical response of the surrounding rock and determine the minimum clear spacing of multiple tunnels crossing an active strike-slip fault. First, the need to investigate the spacing of fault-crossing tunnels is demonstrated based on the strain distribution around the tunnels, fracture patterns in the intertunnel rock mass, and stress distribution characteristics obtained from the model tests. Subsequently, numerical simulations are conducted to examine how various factors affect the mechanical response of the surrounding rock of multiple tunnels crossing a strike-slip fault. Finally, based on multiple numerical simulations, the minimum clear spacing is determined using the distribution of plastic zones as a qualitative indicator and tunnel-wall displacement and the yield approach index as quantitative indicators. The effects of various factors on the minimum clear spacing are also analyzed. The results indicate that (1) fault dislocation markedly intensifies interactions between adjacent tunnels. Compared with the single-tunnel case, twin tunnels exhibit more complex surrounding-rock fracture patterns. The peak tensile strains around Tunnels A and B increase by 35.12% and 32.75%, respectively, while the corresponding peak compressive strains increase by 87.50% and 37.00%, respectively; (2) damage to the surrounding rock of the multiple-tunnel system accumulates and expands with increasing fault displacement; (3) the middle rock pillar is the critical load-bearing component governing the stability of the tunnel complex; and (4) larger intertunnel spacing should be adopted in areas with poor surrounding-rock mechanical properties within the fault zone, greater tunnel burial depths, or relatively gentle fault dips, thereby improving the structural safety of the tunnels.

Key words: tunnel complex, strike-slip fault, tunnel spacing, model test, numerical simulation, fault dip angle

管国荥, 龙腾, 崔臻, 盛谦. 穿越走滑断层深埋隧洞群围岩力学响应与布置方案优化[J]. 隧道建设, 2026, 46(10): 2147-2162.

GUAN Guoxing, LONG Teng, CUI Zhen, SHENG Qian. Mechanical Response and Spacing Optimization of Tunnel Complexes Crossing Strike-Slip Fault[J]. Tunnel Construction, 2026, 46(10): 2147-2162.

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穿越走滑断层深埋隧洞群围岩力学响应与布置方案优化

Mechanical Response and Spacing Optimization of Tunnel Complexes Crossing Strike-Slip Fault

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