马骅山隧洞管棚预支护参数设计

Design of Pre-support Parameters for Mahuashan Tunnel Pipe Shed

软弱围岩隧洞进洞的方式有很多种,管棚预支护进洞应用比较广泛。虽然应用较多,但是对于管棚预支护参数的选取研究还不够系统,通过研究分析,建立一套完整的管棚预支护主要参数选取的方法,通过在具体工程中应用,结合监测数据说明支护效果良好,设计参数科学合理,为快速进洞施工创造了有利条件。

There are many ways to enter tunnels with weak surrounding rock,and pipe shed pre support is widely used for tunnel entry.Although there are many applications,the research on the selection of pre support parameters for pipe sheds is not systematic enough.Through research and analysis,this paper establishes a complete method for selecting the main parameters of pipe shed pre support.By applying it in specific projects and combining it with monitoring data,it shows that the support effect is good and the design parameters are scientifically reasonable,creating favorable conditions for rapid tunnel construction.