临近导热断层高岩温隧道稳态温度场及施工工法研究  

Investigation of Steady-State Temperature Fields and Construction Methods of High Rock Temperature Tunnels near Thermal Conductivity Faults

作　　者：崔光耀 柯政希 王道远[2,3] Cui Guangyao;Ke Zhengxi;Wang Daoyuan(School of Civil Engineering,North China University of Technology,Beijing 100144,China;Department of Road and Bridge Engineering,Hebei Jiaotong Vocational and Technical College,Shijiazhuang,Hebei 050091,China;Hebei Provincial Seasonal Frozen Area Highway Service Safety and Early Warning Technology Innovation Center,Shijiazhuang,Hebei 050091,China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]河北交通职业技术学院路桥工程系,河北石家庄050091 [3]河北省季冻区公路服役安全与预警技术创新中心,河北石家庄050091

出　　处：《黑龙江工业学院学报(综合版)》2024年第12期133-139,共7页Journal of Heilongjiang University of Technology(Comprehensive Edition)

基　　金：国家自然科学基金项目(项目编号:52178378)。

摘　　要：为进一步提高临近导热断层高岩温隧道的施工安全性,依托个元高速公路尼格隧道工程,采用有限元ABAQUS软件对临近导热断层高岩温隧道稳态温度场及不同施工工法(全断面、二台阶、三台阶)的施工安全性进行研究。研究结果表明:隧址区温度场主要受导热断层控制,热量主要由断层破碎带底部沿断层倾向向上传递;施工期间隧道采取降温措施后,在隧址区岩体中起到了“降温棒”的作用,隧道1倍洞径范围内围岩温度降至30~44.50℃,初期支护结构左侧受导热断层影响较大,左侧温度高于右侧,温差为1.62℃;三台阶工况在控制变形和初期支护结构内力方面最优,初期支护结构最小安全系数最大,为3.267;推荐本工程采用三台阶施工工法。研究成果可为类似高岩温隧道工程施工提供参考。In order to further improve the construction safety of high rock temperature tunnels near thermal conductivity faults,the steady-state temperature field of high rock temperature tunnels near thermal conductivity faults and the construction safety of three different construction methods full-section,second-order fault step,third-order fault step were studied by using finite element ABAQUS software,relying on the Nige Tunnel Project of Gejiu to Yuanyang Expressway.The results show that the temperature field in the tunnel construction field is mainly controlled by the thermal conductivity fault,and the heat is mainly transferred upwards from the bottom of the fault fragmentation area along the fault tendency.During the construction period,cooling measures are taken for the tunnel,which act as a"cooling rod"in the rock of the tunnel site.The temperature of the surrounding rock within double the diameter of the tunnel drops to 30℃to 44.50℃,the left side of the primary lining structure is significantly influenced by the thermal conductivity fault,and the temperature on the left side is higher than that on the right side,with a temperature difference of 1.62℃.The third-order fault step construction condition is optimal in controlling the deformation and internal force of the primary lining structure,and the minimum safety factor of the primary lining structure is 3.267.The three-step construction method is recommended for this project.The results of the study can be used as a reference for similar high rock temperature tunnel construction projects.

关 键 词：隧道工程 导热断层 高岩温 稳态温度场 施工工法 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]