单护盾TBM掘进洞段岩爆特征与数值模拟研究  

Study on rock burst characteristics and numerical simulation of single shield TBM tunneling section

作　　者：许史[1] Xu Shi(Xinjiang Water Resources and Hydropower Survey and Design Institute Co.,Ltd.,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000

出　　处：《吉林水利》2025年第4期23-27,共5页Jilin Water Resources

摘　　要：为探究复杂地质条件下单护盾隧道掘进机(TBM)掘进过程中岩爆特征及支护结构受力规律,以某输水隧洞为研究对象,基于FLAC3D数值模拟软件建立模型,对典型洞段Ⅱ类和Ⅲ类围岩的岩爆能量分布特征及支护结构应力分布规律进行分析。结果表明,岩爆能量主要集中于掌子面附近,Ⅱ类围岩能量分布范围较小但强度适中,Ⅲ类围岩分布范围更广且强度更高;支护结构的压应力和拉应力分布随围岩类别显著变化,Ⅱ类围岩压应力较大,Ⅲ类围岩局部拉应力较高,存在失稳风险。综上,提出在Ⅲ类围岩段应加强局部支护的优化建议,为单护盾TBM在复杂地质条件下的安全施工和支护设计提供参考依据。In order to explore the characteristics of rock burst and the stress law of supporting structure in the tunneling process of single shield tunnel boring machine(TBM)under complex geological conditions,a water conveyance tunnel was taken as the research object,and a numerical model was established based on FLAC3D numerical simulation software.The distribution characteristics of rock burst energy and the stress distribution law of supporting structure in typeⅡand typeⅢsurrounding rock of typical tunnel section were analyzed.The results show that the rockburst energy is mainly concentrated near the tunnel face,the energy distribution range of typeⅡsurrounding rock is small but the strength is moderate,and the distribution range of typeⅢsurrounding rock is wider and the strength is higher.The distribution of compressive stress and tensile stress of supporting structure changes significantly with the type of surrounding rock.The compressive stress of typeⅡsurrounding rock is large,and the local tensile stress of typeⅡsurrounding rock is high,which has the risk of instability.It is proposed that the optimization of local support should be strengthened in classⅡsurrounding rock section,which provides a reference for the safe construction and support design of single shield TBM un-der complex geological conditions.

关 键 词：单护盾TBM 数值模拟 岩爆特征 支护结构 FLAC3D 

分 类 号：TU452[建筑科学—岩土工程]