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青海省引大济湟调水总干渠隧洞工程全长24.17 km,采用德国维尔特生产直径为5.93 m TBM机和法国生产直径5.75 m的NFM-TBM机施工掘进,因隧洞围岩具有高应力、大断层、大埋深等罕见技术难题,历时11年之久才全面贯通。总结分析了在引大济湟调水总干渠隧洞施工过程中遇到的部分难题、卡机问题、以及采取的脱困技术,提出了一种非常规拆卸方式,即同时拆卸两台TBM掘进机,避免按照顺序的拆卸,可节省50%的时间,极大地减少了拆卸费用,为以后类似高原、高寒地区隧洞施工有效节省投资、节约拆卸时间提供了参考依据。
In Qinghai Province, the total length of the main canal of Jijiaji water diversion project is 24.17 km. Construction of the NFM-TBM machine with a diameter of 5.93 m TBM and a production diameter of 5.75 m in France is carried out. Due to the high stress of the surrounding rock of the tunnel, Large faults, deep buried deep and other rare technical problems, which lasted 11 years before the full penetration. This paper summarizes some problems encountered in the construction of the main canal of Dajian River water diversion project, the problem of the card machine and the technology to take off the storm. An unconventional disassembly mode is proposed, in which two TBM boring machines are dismantled at the same time, Avoid 50% of the time in accordance with the order of demolition, which can greatly reduce the demolition costs for the future similar to the plateau, alpine tunnel construction effectively save investment and save time for demolition provided a reference.