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題 名 | 潛盾施工遭遇既有地錨處理方式之探討=Countermeasures of Shield Tunnel Construction for Mitigating Ground Anchors |
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作 者 | 陳俊融; 廖惠生; 余念梓; | 書刊名 | 地工技術 |
卷 期 | 145 2015.09[民104.09] |
頁 次 | 頁41-48 |
專 輯 | 潛盾隧道新技術之應用 |
分類號 | 441.9 |
關鍵詞 | 地錨; 潛盾機; 潛盾障礙物; Anchor; Shield tunnel; Obstacle; |
語 文 | 中文(Chinese) |
中文摘要 | 早期深開挖工程常見以預力地錨工法作為擋土支撐系統,且因使用工法上的限制,在結構物完成後無法完整移除地錨結構,致使後續新建工程可能遭遇殘留地錨的風險。本文主要說明案例為台北捷運系統後續路網潛盾及共同管道新建工程,於共同管道推管工作井連續壁施工過程發現地下不明障礙物,經研判應為鄰近建物地下室開挖殘留之預力地錨,該地錨預估位於後續推進的捷運潛盾路徑上,必須於潛盾施工前移除。處理方式除變更潛盾隧道線型外,再藉由變更潛盾路徑上方共同管道的擋土設施型式,以連續壁施工機具移除殘留地錨構件;另考量部分地錨位於路口無法事先移除,以補強潛盾機結構方式採切削方式直接通過,並考量於預設定點進行潛盾受損的修復準備,本文將一併說明後續處理方式。 |
英文摘要 | In previous years, a prestress anchor method was used in an earth support system for deep excavation in Taiwan. Because the method was limited to removing whole anchors after construction, the follow-up construction may encounter such anchors. This paper presents a case study of a shield tunnel in the Taipei MRT. During the construction of a diaphragm wall in a driving shaft, anchors for excavating the adjacent building were found. These anchors on the path of the shield tunnel had to be removed before shield driving. This problem was solved by changing the alignment, and a diaphragm wall method was used to remove the remaining anchors. Because some anchors located within the intersection were difficult to remove, we strengthened the cutter bit of the shield machine and considered a repair plan for the supposed location. This paper proposes other special measures. |
本系統中英文摘要資訊取自各篇刊載內容。