英文篇名
TBM TUNNELING IN NEW WUCHIEH AND LISHI CREEK DIVERSION TUNNEL PROJECT
作者
李明雄、李鴻洲、李慶龍、鄭建和、黃偉光、劉欽正
關鍵字
引水隧道,隧道鑽掘機(TBM),長距離地質鑽探,鑽掘效率,擠壓性岩盤,施工工率
摘要
台灣電力公司『新武界隧道及栗栖溪引水工程』之隧道總長約16.5公里,其中中游段之引水隧道長約7.8公里,因推估地質均質尚佳且無明顯之剪裂帶或斷層帶存在,並為考慮縮短工期、降低對環境之衝擊、減少勞工需求及提昇台灣隧道工程施工技術等因素,決定採用安全且連續一貫快速作業之隧道鑽掘機(TBM)開挖施工。施工期間,於西元2001年11月份創下659.3m/月之台灣最快鑽掘紀錄,其後雖曾遭遇局部岩盤破碎或異常擠壓等不良地質,以及遭受桃芝颱風之暴雨肆虐成災,然於採取適當應變措施及處理得宜下,TBM終於克服困難並持續順利鑽掘,且於2002年6月7日TBM段隧道順利貫通,完成鑽掘工作,為台灣隧道工程首次以TBM貫通案例,且達到最佳平均月進度(315m/月)及最大鑽掘長度(6,523公尺)之新里程碑。本文簡要說明施工前地質探查、TBM設備與支撐設計、TBM施工,以及鑽掘效率檢討、不良地質處理等,期能提供爾後隧道工程TBM開挖施工參考。
英文摘要
The total tunnels length of the New Wuchieh Diversion Tunnel & Lishi Creek Diversion Project, Taiwan Power Company, is about 16.5 km. Considering the homogeneous rock condition and without obvious disadvantageous geological structures, the middle section 7.8 km long tunnel is excavated by the TBM (Tunnel Boring Machine). TBM tunneling can not only shorten the construction period but also lower the impact of the environments, requiring less labor and improving the tunneling technique of Taiwan. During the working period, a serious earthquake, squeezing grounds and a heavy typhoon had been encountered. With proper measurements and treatments, the excavation of the TBM is very smooth. On June 7th 2002, the tunnel is the first successful break-through of TBM tunneling in Taiwan. The best monthly progress of 659.3m is achieved on November 2000, the best daily progress is achieved on January 3rd 2001. The average monthly progress of 315 m and the length of 6523m became a new milestone of Taiwan. This report briefly introduces the project from planning, design and construction point of view, can be referred for future TBM tunneling.