隧道穿越断层破碎带施工技术及渗流破坏特性研究  

Research on the Construction Technology and Seepage Failure Characteristics of Tunnel Crossing Fault Fracture Zone

作　　者：吴新栋 Wu Xindong(Jianli Expressway Engineering Construction General Contracting Headquarters of China Railway Construction Kunlun Investment Group Co.,Ltd.,Guiyang 550025,China;Shaanxi Provincial Key Laboratory of Geotechnical and Underground Space Engineering,Xi’an 710055,China)

机构地区：[1]中国铁建昆仑投资集团有限公司剑黎高速公路工程施工总承包指挥部,贵阳市550025 [2]陕西省岩土与地下空间工程重点实验室,西安市710055

出　　处：《北方交通》2024年第12期79-82,共4页Northern Communications

摘　　要：断层破碎带诱发的隧道突水突泥地质灾害不仅会延误工期,还会引起水资源枯竭和地表塌陷。为分析不同工法下隧道穿越断层破碎带过程中的渗流特性,文章依托牛练塘隧道工程,通过建立COMSOL数值模型,研究不同施工工法对断层破碎带渗流特性的影响。结果表明:双侧壁导坑法对隧道应力场和渗流场的影响最小,在土体岩体较为软弱的隧道中适用性较强;全断面法对围岩影响相对较大,但施工造成扰动的次数少;台阶法虽便于施工,但对围岩造成扰动的次数较多。The geological disasters of tunnel water and mud inrush induced by the fault fracture zone will not only delay the construction period,but also cause the exhaustion of water resource and land surface collapse.In order to analyze the seepage characteristics of the tunnel crossing the fault fracture zone under different construction methods,the influence of different construction methods on the seepage characteristics of the fault fracture zone is studied by establishing the COMSOL numerical model based on the Niuliantang tunnel project.The results show that:the double-sidewall guide pit method has the least influence on the stress field and seepage field of the tunnel,and has strong applicability in tunnels with weak soil and rock mass.The full-section method has a relatively large influence on the surrounding rock,but the number of disturbances caused by the construction is small.Although the bench cut method is convenient for the construction,it causes more disturbances to the surrounding rock.

关 键 词：隧道工程 断层破碎带 施工技术 渗流特性 数值模拟 

分 类 号：U455.4[建筑科学—桥梁与隧道工程]