2025年5月4日 星期日
岩石力学与工程学报  2023, Vol. 42 Issue (1): 1-27    DOI: 10.13722/j.cnki.jrme.2022.0667
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GZZ岩体强度三维分析理论与深埋隧道应力控制设计分析方法
朱合华1,2,蔡武强1,梁文灏1,3
(1. 同济大学 土木工程学院,上海 200092;2. 同济大学 土木工程防灾国家重点实验室,上海 200092; 3. 中国铁建股份有限公司,北京 100855)
GZZ strength-based three-dimensional analysis theory and stress-controlled design method in deep tunneling
ZHU Hehua1,2,CAI Wuqiang1,LIANG Wenhao1,3
(1. College of Civil Engineering,Tongji University,Shanghai 200092,China; 2. State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China; 3. China Railway Construction Co.,Ltd.,Beijing 100855,China)
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摘要 深部卸荷岩体表现出显著的三维非线性力学特征,浅埋隧道的设计方法和工程经验不适用于深埋隧道工程。传统计算模型未反映深部岩体力学特征,参数主要通过室内试验或位移反分析确定,缺乏实时、准确获取岩体参数并进行深埋隧道动态诊断的设计分析理论和方法。本文综述和研究了GZZ岩体强度三维连续分析的理论基础、参数原位取值方法及对深部岩体工程的适用性;考虑深部岩体三维强度和峰后剪胀效应的非关联塑性流动法则及弹塑性本构关系得到了岩石真三轴试验、模型试验、现场监测数据的验证;基于数字化原位测试获取岩体力学参数,可实现隧道工程三维正分析和动态设计,克服了传统位移反分析设计方法的局限;揭示了深埋隧道开挖面三维挤出变形规律和应力主轴旋转力学机制,阐明了中间主应力和三维应力状态对深埋隧道稳定的力学影响机制;探讨了“应力控制”设计分析方法和思路在隧道工程精确分析和精准控制中的作用,为深埋岩体隧道动态设计和智能建造提供理论依据与技术支撑。
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关键词 岩石力学GZZ岩体强度三维正分析深埋隧道应力控制数字化原位测试    
Abstract:The unloading of deep rock mass shows significant three-dimensional and nonlinear mechanical characteristics,and the design analysis method and engineering experience based on shallow tunnels cannot be directly transferred to deep engineering. The traditional calculation model does not reflect the mechanical characteristics of the deep rock mass. The generalized rock mass parameters are mainly determined by the displacement back analysis,and there is still a lack of design analysis theory and method for real-time and accurate acquisition of rock mass parameters and dynamic diagnosis of deep tunnels. The theoretical basis,in-situ parameter acquisition and applicability of GZZ rock mass strength based 3D continuous analysis method for deep rock mass are reviewed and studied. The non-associated plastic flow rule and elastoplastic constitutive model,considering 3D strength and dilatancy effect of deep rock mass,have been verified by true triaxial rock experiments,physical model tunnels,and in-situ tunnel monitoring data. The digital in-situ testing technology is promising to the obtain mechanical parameters of rock mass and thus to realize the 3D positive analysis and real-time design of deep tunneling,which overcomes the limitations of traditional displacement-based back analysis approach. It reveals the 3D extrusion law of the deep tunnel face and the mechanical mechanism of the principal stress rotation,and expounds the mechanical influence mechanism of the intermediate principal stress and the 3D stress state on the stability of the deep tunnel. The significance of the stress control-based design method and analysis idea in the deep tunneling precise analysis and control is discussed and investigated,which provides theoretical basis and technical support for intelligent construction and real-time design of deep and ultra-deep tunnels.
Key wordsrock mechanics    GZZ rock mass strength    three-dimensional forward analysis    deep tunneling    stress control    digital in-situ testing
    
引用本文:   
朱合华1,2,蔡武强1,梁文灏1,3. GZZ岩体强度三维分析理论与深埋隧道应力控制设计分析方法[J]. 岩石力学与工程学报, 2023, 42(1): 1-27.
ZHU Hehua1,2,CAI Wuqiang1,LIANG Wenhao1,3. GZZ strength-based three-dimensional analysis theory and stress-controlled design method in deep tunneling. , 2023, 42(1): 1-27.
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