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題 名 | 潛盾穿越營運中捷運車站下方分析評估與施工規劃安全管控=Analytical Evaluation and Construction Planning of a Shield Tunnel Passing Underneath an Operating MRT Station |
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作 者 | 李榮瑞; 黃啟修; 黃文俊; 蘇福來; 崔澎生; 陳耀維; | 書刊名 | 地工技術 |
卷 期 | 145 2015.09[民104.09] |
頁 次 | 頁85-96 |
專 輯 | 潛盾隧道新技術之應用 |
分類號 | 441.9 |
關鍵詞 | 連續壁破除; 地盤改良; 自動監測; Breakthrough of diaphragm wall; Ground improvement; Automatic monitoring; |
語 文 | 中文(Chinese) |
中文摘要 | 近年來隨著國民生活水準提昇與都市快速發展,人口與建築物日趨密集,重大交通工程於規劃上往往需考量遭遇既有結構障礙物衝突之影響,隨著臺北捷運第一階段與第二階段路網陸續完成,後續路網為了串聯既有捷運車站路線,必須與營運中的路線或車站重疊交會,因此就設計分析上需慎密考慮如何將施工風險降低,本文主要介紹於環狀線捷運施工標潛盾隧道穿越營運中既有大坪林捷運G4車站下方的案例,為降低潛盾掘進之風險,規劃設計時即考量於穿越車站連續壁前方及站體下方配置一系列垂直及水平地盤灌漿改良工法,於細設段分別以二維及三維分析軟體配合現場之邊界條件及合理之假設,依施工工序模擬潛盾穿越對既有車站結構物之影響,並將分析結果落實於後續施工風險管控,施工過程中引進新的施工技術,包括水平鑽孔定位儀確認施工精度、配合人員出艙以高壓水刀、鑽石鏈鋸切割及油壓劈裂G4站及新設Y6車站連續壁,潛盾穿越G4車站站體下方過程中輔以嚴密之掘進管控及自動監測系統,期將此成功案例供後續類似工程參考。 |
英文摘要 | In recent years, an increase in the living standards and rapid urban development has led to an increase in populations and building density. In the planning phase of major transportation projects, the obstacles that existing structures present should be considered. After the completion of the first and second phases of the Taipei MRT project in the near future, the additional following routes will overlap the operating routes or stations to connect with the existing MRT network. Therefore, the means of reducing the construction risk must be considered in the design and analysis phases. This paper presents a circular line case of a shield tunnel that passes underneath an operating MRT station. To reduce the risk of shield machine launching, the vertical and horizontal ground improved grouting method used in front of diaphragm wall of station and beneath station was considered in the planning and design stage. Moreover, in the detail design, twoand three-dimensional analytical software was used. According to the construction process, the influence of a shield passing underneath the existing station structure was simulated on the basis of the actual boundary conditions and reasonable assumptions. New construction technologies were applied during construction. For example, a horizontal drilling locator was used to confirm the construction accuracy, and a high-pressure water jet and diamond chainsaw were used to cut both the existing and new diaphragm walls of the station. The analysis results were considered for the subsequent construction risk control. The process of the shield tunnel passing underneath the existing MRT station was managed by the launching control and automatic monitoring system. This successful case can be referred to for similar projects in the future. |
本系統中英文摘要資訊取自各篇刊載內容。