滇中红层软岩隧洞不良地质段施工技术研究  

Research on Construction Technology of Poor Geological Section of Red Layered Soft Rock Tunnel in Central Yunnan

作　　者：龚元江 贾生栋 聂启强 GONG Yuanjiang;JIA Shengdong;NIE Qiqiang(Yunnan Dianzhong Water Diversion Engineering Co.,LTD,Kunming 650000,China;China Northwest Water Conservancy&Hydropower Engineering Consulting Co.,Ltd.,Xi'an 710100,China;No.3 Construction Company of China Railway No.10 Engineering Group,Hefei 230000,China)

机构地区：[1]云南省滇中引水工程有限公司,云南昆明650000 [2]中国水利水电建设工程咨询西北有限公司,陕西西安710100 [3]中国中铁十局第三建设有限公司,安徽合肥230000

出　　处：《云南水力发电》2024年第10期162-167,共6页Yunnan Water Power

基　　金：云南省重大科技专项计划项目(202102AF080001)。

摘　　要：滇中引水工程线路较长,跨越多个地质构造单元,广泛存在活动断裂、高地下水、高地应力、软岩大变形等问题。滇中红层软岩洞段集中分布在大理、楚雄线路,其中,楚雄段凤凰山隧洞倒虹吸交通洞上游控制段穿越滇中红层软岩及元谋-绿汁江断裂带。该段施工过程中,充分运用超前地质预报、超前支护、预留变形量、分层分部开挖、多个支护类型、监控量测、及时封闭成环等手段,将多个控制因素加入到开挖支护施工中,增加了隧洞稳定性,提高了安全保证率,形成了适合滇中红层软岩不良地质段的施工技术。The water diversion project in central Yunnan has a long route,spanning multiple geological structural units,and is widely affected by active faults,high groundwater,high stress,and large deformation of soft rocks.The red layered soft rock cave section in central Yunnan is concentrated on Dali and Chuxiong railway lines.Among them,the upstream control section of Fenghuangshan Tunnel inverted siphon traffic tunnel in Chuxiong section crosses the soft rock of the red layer in central Yunnan andYuanmou Lvzhi River fault zone.During the construction process of this section,the construction team fully utilized advanced geological forecasting,advanced support,reserved deformation,layered and segmented excavation,multiple support types,monitoring and measurement,and timely closure into a ring.It incorporates multiple control factors into excavation and support construction,increases tunnel stability,improves safety assurance rate,and forms a construction technology suitable for the unfavorable geological section of the red layer soft rock in central Yunnan.

关 键 词：滇中红层软岩 隧洞 断裂带 开挖支护 施工技术 

分 类 号：TV672.1[水利工程—水利水电工程] TU941[建筑科学—建筑技术科学]