哈密抽水蓄能电站地下洞室不良地质段大管棚施工技术研究  

Research on the Construction Technology of Large Pipe Shed in the Poor Geological Sections of the Underground Cavern in Hami Pumped Storage Project

作　　者：王建帮 WANG Jianbang(Sinohydro Bureau 5 Co.,LTD.,Chengdu Sichuan 610066)

机构地区：[1]中国水利水电第五工程局有限公司,四川成都610066

出　　处：《四川水力发电》2024年第4期37-40,共4页Sichuan Hydropower

摘　　要：为确保隧洞内断层破碎带的施工安全和掌子面岩体稳定,研究并提出了一种管棚支护参数的设计方法。大管棚作为隧洞不良地质段施工中一种重要的加固措施被广泛应用于各类工程中,但管棚的施工参数以及支护效果研究仍远远落后于实际工程需求,很多设计参数缺乏工程施工验证。哈密抽水蓄能电站工程建设中出现的通风兼安全洞及进厂交通洞,前期发生数次掌子面坍塌事故的实例,其超前支护仅采用小导管,表明了仅靠小导管支护效果不佳的事实。阐述了有针对性地进行管棚支护设计,采用“管棚+钢筋束+钢支撑+纳米仿钢纤维混凝土封闭”的支护形式取得了较好的加固效果,所取得的研究成果可为断层破碎带隧洞管棚支护参数设计参考。In order to ensure the safe construction of the tunnel in the fault fracture zone and the stability of the rock mass of the tunnel face,a design method for the supporting parameters of the pipe shed was proposed.As an important reinforcement measure in the construction of poor geological sections of tunnels,large pipe sheds are widely used in various engineering practices,but the research on the construction parameters and support effects of pipe sheds is still far behind the actual engineering requirements,and many design parameters lack engineering construction verification.Combined with the example of the Hami pumped storage project,only small conduits were used for the early advance support in the construction of the ventilation and safety tunnel and the access tunnel,and the tunnel face collapsed several times.Based on the tunnel collapse,the support using only small conduits was verified to be weak.The paper expounds the design of the pipe shed support,and adopts the support form of"pipe shed+steel bundle+steel support+nano imitation steel fiber reinforced concrete closed"to achieve a good reinforcement effect.The research results can provide a reference for the design of the supporting parameters of tunnel pipe sheds in fault fracture zones.

关 键 词：地下洞室 不良地质段 大管棚 哈密抽水蓄能电站 

分 类 号：TV7[水利工程—水利水电工程] TV52TV554TV55413