大跨度连拱隧道下穿古建筑物的安全评估  

Safety Assessment of Long-Span Multi-arch Tunnel Passing under Ancient Buildings

作　　者：郭佳嘉[1,2] 张国浩 褚存[1,2,3,4] GUO Jiajia;ZHANG Guohao;CHU Cun(CCCC Second Harbor Engineering Co.,Ltd.,Wuhan 430040,Hubei,China;CCCC SHEC Fourth Engineering Co.,Ltd.,Wuhu 241000,Anhui,China;Key Laboratory of Large-Span Bridge Construction Technology of Ministry of Communications,Wuhan 430040,Hubei,China;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei,China)

机构地区：[1]中交第二航务工程局有限公司,湖北武汉430040 [2]中交第二航务工程局第四工程有限公司,安徽芜湖241000 [3]长大桥梁建设施工技术交通行业重点实验室,湖北武汉430040 [4]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《重庆交通大学学报（自然科学版）》2022年第8期53-57,共5页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：依托下穿古炮台遗址的大跨度连拱隧道工程,基于精细化三维地质建模技术,使用FLAC3D仿真软件对隧道下穿古建筑时所引起的地表变形进行了分析,并对古建筑物变形破坏情况进行了评估。研究结果表明:当中导洞开挖时,地表变形较小,对古建筑物几无影响;当正洞开挖贯通时,对古炮台的沉降变形影响较大、水平变形影响较小。开挖时所引起的地表沉降变形为中部区域最大、并向周围递减,地表水平变形为中部最小、周围区域较大;古炮台最大沉降量值为2.1cm,最大水平位移值为0.3cm。古炮台整体处于弹性变形状态,说明隧道设计的支护参数及施工方案合理可行,不会对古建筑物产生严重的损坏。Based on the large-span muti-arch tunnel project that goes through the ancient fortress site,based on the fine 3D geological modeling technology,the surface deformation caused by the tunnel going through the ancient building was analyzed by using FLAC3D simulation software,and the deformation and damage of the ancient building was evaluated.The research results show that the ground surface deformation is small when the middle guide tunnel is excavated,and it has little influence on the ancient buildings.When the front tunnel is excavated through,the settlement deformation of the ancient fort is greatly affected,but the horizontal deformation is little affected.The surface settlement deformation caused by excavation is the largest in the central area and decreases to the surrounding area,while the surface horizontal deformation is the smallest in the central area and larger in the surrounding area.The maximum settlement value of the ancient fort is 2.1 cm,and the maximum horizontal displacement value is 0.3 cm.The whole ancient fort is in elastic deformation state,indicating that the supporting parameters and construction scheme of the tunnel design are reasonable and feasible,and will not cause serious damage to the ancient building.

关 键 词：隧道工程 连拱隧道 三维地质建模 古建筑物 沉降控制 安全评估 

分 类 号：U451[建筑科学—桥梁与隧道工程]