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題 名 | 新莊線(市區段)潛盾隧道穿越臺、高鐵隧道既有結構下方之成功案例=Case Study of Tunneling through a Retaining Wall Beneath an Existing Subway System for the Xinzhuang Line |
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作 者 | 詹榮鋒; 程道信; | 書刊名 | 捷運技術 |
卷 期 | 42 2010.02[民99.02] |
頁 次 | 頁99-114 |
專 輯 | 縱橫連通˙臺北城-新莊線(市區段)專輯 |
分類號 | 441.9 |
關鍵詞 | 地下擋土壁; 水平灌漿; 玻璃纖維噴凝土; 點井; Underground retaining wall; Horizontal grouting; |
語 文 | 中文(Chinese) |
中文摘要 | 臺北捷運新莊線於松江南京站與忠孝新生站之間,其潛盾隧道工程必須自營運中的 臺鐵與即將營運高鐵隧道結構下方通過,且需穿越既有地鐵結構下方之六道擋土壁體, 包括不規則之連續壁體及非連續性之基樁群等。本項工程由於基地外部環境條件諸多限 制,捷運隧道線形與穿越之壁體及基樁群又非正交,壁體無法維持一般完整性與連續性 之需求,造成穿越過程中莫大之困擾與風險。本施工案例採取之工法係由潛盾機盾首進 行擋土壁體前後之水平灌漿地盤改良,並配合出艙挖掘作業以玻璃纖維噴凝土工法及點 井工法搭配使用,以確保擋土壁體敲除作業之安全,敲除過程藉由僅約85*55公分之進出 通道,進入潛盾機前方狹隘的工作區間內,以人工敲除方式排除障礙。本文特就穿越前 述地下障礙所採行對策與施工方法,以及穿越過程所面臨困難、危險狀況之發生、因應與克服,做深入之案例說明。 |
英文摘要 | Tunneling between Songjiang Nanjing Station and Zhongxiao Xinsheng Station on the Taipei MRT Xinzhuang line was challenged by the need to drive through an underground structure containing six retaining wall panels, including irregular continuous walls and non-continuous foundation piles, beneath the existing tunnels of the Taiwan Railways Administration (TRA) and Taiwan High Speed Rail (THSR) system. As result of external environment limitations, a non-orthogonal approach was taken between the tunnel alignment and the retaining wall and foundation piles. For safety reasons, the construction procedure of this case adopted horizontal grouting to improve the soil condition around the retaining wall from the head of the Tunnel Boring Machine (TBM), and was coordinated with the glassfiber shotcrete method and the well-point method to excavate and break up the obstacles and wall bodies through the air chamber with an only 85*55 cm channel to enter a very narrow working space at the front of the TBM. This article aims to describe the construction method and countermeasures adopted during this case, as well as the difficulties encountered during the period when TBM drove through the wall. Furthermore, it conducts a wide discussion of the dangerous conditions that occurred and countermeasures taken to overcome them. |
本系統中英文摘要資訊取自各篇刊載內容。