跨导热断层隧道动力响应及震害机理分析  

Analysis of Dynamic Response and Damage Mechanism of Tunnel Crossing Thermal Fault

作　　者：袁金秀 朱正国[1] 王道远[2] 崔光耀[3] 马济文 宋宝禄 田小路 章浩天 YUAN Jinxiu;ZHU Zhengguo;WANG Daoyuan;CUI Guangyao;MA Jiwen;SONG Baolu;TIAN Xiaolu;ZHANG Haotian(Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;Hebei Jiaotong Vocational and Technical College,Shijiazhuang,Hebei 050091,China;North China University of Technology,Beijing 100144,China;Ningxia Intercity Railway Co.Ltd,Yinchuan,Ningxia 750200,China;China Railway 16th Bureau Group Electrification Engineering Co.Ltd,Beijing 100018,China;China Railway 16th Bureau Group Fourth Engineering Co.Ltd,Beijing 101400,China;Hebei Provincial Seasonal Frozen Area Highway Service Safety and Early Warning Technology Innovation Center,Shijiazhuang,Hebei 050091,China)

机构地区：[1]石家庄铁道大学,石家庄050043 [2]河北交通职业技术学院,石家庄050091 [3]北方工业大学,北京100144 [4]宁夏城际铁路有限责任公司,银川750200 [5]中铁十六局集团电气化工程有限公司,北京100018 [6]中铁十六局集团第四工程有限公司,北京101400 [7]河北省季冻区公路服役安全与预警技术创新中心,石家庄050091

出　　处：《铁道工程学报》2025年第1期69-76,共8页Journal of Railway Engineering Society

基　　金：国家自然科学基金项目(51978424);河北省自然科学基金项目(E2021419001);河北省重点研发计划项目(22375416D)。

摘　　要：研究目的:跨导热活动性断层段是隧道震害最为严重的段落之一,但目前其震害作用机理尚不明确。本文建立“热-震-错”耦合计算模型,考虑不同活动性断层岩温、倾角、宽度、围岩级别等因素,探讨跨导热活动性断层段隧道地震动力响应规律;同时,对比单一温度荷载、单一地震荷载、单一错动及“热-震-错”耦合作用下主应力、剪应力的异同,揭示跨导热断层段隧道震害作用机理。研究结论:(1)导热断层的存在改变了地温的热传导路径,原水平分层的初始温度场转变为在导热断层位置呈现向上突起的分布特征,其影响范围为断层两侧3倍洞跨;(2)隧道结构主应力和位移均随断层岩温、倾角、宽度和围岩级别的增大而增大,但断层各参数对隧道结构应力影响远大于对位移影响;最大主应力位于活动性断层上盘D2位置附近,最大位移位于活动性断层上盘S14位置附近;(3)主拉应力受断层参数影响强弱关系为:断层宽度>断层倾角>断层围岩级别>断层岩温;主压应力受断层参数影响强弱关系为:断层围岩级别>断层宽度>断层倾角>断层岩温;位移受断层参数影响强弱关系为:断层宽度>断层围岩级别>断层倾角≈断层岩温;(4)跨导热断层段隧道震害作用机理为断层错动影响最强,地震影响次之,高岩温影响最弱;其隧道衬砌结构破坏以60°共轭剪切破坏为主;(5)本研究成果可为跨导热断层隧道抗减震设计提供一定理论依据。Research purposes:The section of crossing thermal active fault is one of the most severely damaged sections in tunnel seismic damage,but its seismic damage mechanism is currently unclear.Taking into account factors such as rock temperature,dip angle,width,and surrounding rock level of different active faults,a coupled calculation model of"thermal-seismic-dislocation"is established to explore the seismic dynamic response law of tunnels crossing thermal conductive active fault segments.By comparing the similarities and differences in principal stress and shear stress under a single temperature load,a single seismic load,a single dislocation,and a"thermal-seismic-dislocation"coupling effect,the mechanism of seismic damage in tunnels across thermal conductive fault segments is revealed.Research conclusions:(1)The existence of thermal conductivity faults changes the thermal conductivity path of ground temperature,and the initial temperature field of the original horizontal stratification changes to an upward protruding distribution feature at the location of the thermal conductivity fault,with an impact range of three times the tunnel span on both sides of the fault.(2)The main stress and displacement of the tunnel structure increase with the increase of fault rock temperature,dip angle,width,and surrounding rock level,but the influence of various parameters of the fault on the stress of the tunnel structure is much greater than displacement;The maximum principal stress is located at position D2 on the hanging wall of the fault,and the maximum displacement is located at position S14 on the hanging wall of the fault.(3)The strength relationship between the main tensile stress and the influence of fault parameters is as follows:fault width>fault dip angle>fault surrounding rock level>fault rock temperature;The strength relationship between the main compressive stress and the influence of fault parameters is as follows:fault rock level>fault width>fault dip angle>fault rock temperature;The strength relationship between d

关 键 词：隧道 强震 导热断层 动力响应 震害机理 

分 类 号：U45[建筑科学—桥梁与隧道工程]