首页> 外文会议>2009 rapid excavation and tunneling conference proceedings >8 M DIAMETER 7 KM LONG BELES TAILRACE TUNNEL (ETHIOPIA) BORED AND LINED IN BASALTIC FORMATIONS IN LESS THAN 12 MONTHS
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8 M DIAMETER 7 KM LONG BELES TAILRACE TUNNEL (ETHIOPIA) BORED AND LINED IN BASALTIC FORMATIONS IN LESS THAN 12 MONTHS

机译:8毫米直径7公里长的贝斯尾巴隧道(埃塞俄比亚),在不到12个月的时间内就以玄武岩形式钻孔和衬砌

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On the 2nd of June 2007 SELI S.p.A. started the excavation of Beles Tailrace Tunnel (Ethiopia). The new 8,07 m diameter DS Universal TBM utilized for the tunnel excavation was manufactured by SELI S.p.A. and allowed the installation of 30 cm thick concrete lining, contemporaneously with the excavation of 7,200 m of tunnel.The greatest part of the tunnel alignment was excavated in hard and sound basaltic rocks.The paper describes the main steps of the tunnelling operations which led to a remarkably rapid excavation, with a peak production of 36 m / day and a final breakthrough achieved 46 days ahead of the contractual deadline.Furthermore the paper describes the work and logistic organization that was set up to efficiently perform the mechanized excavation in the very remote area of the project.
机译:2007年6月2日,SELI S.p.A.开始挖掘Beles Tailrace隧道(埃塞俄比亚)。用于隧道开挖的直径为8,07 m的新DS Universal TBM是由SELI S.p.A.制造的,允许在开挖7,200 m的同时安装30 cm厚的混凝土衬砌。 隧道定线的最大部分是在坚硬而健全的玄武岩中开挖的。 该文件描述了隧道作业的主要步骤,这些步骤导致开挖非常迅速,峰值产量为36 m / day,最终突破是在合同截止日期之前46天实现的。 此外,本文还介绍了为在项目的偏远地区有效地进行机械化挖掘而建立的工作和物流组织。

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