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題名 | 推管工法特殊障礙處理--牽引工法=Special Treatment for Removing Obstructions in the Pipe Jacking Construction--Pull Back Method |
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作者 | 洪顯宗; 矢野勝也; | 書刊名 | 捷運技術 |
卷期 | 38 2008.02[民97.02] |
頁次 | 頁59-73 |
專輯 | 捷運施工技術 |
分類號 | 441.9 |
關鍵詞 | 牽引工法; 隧道工程; 潛盾工法; 推管工法; |
語文 | 中文(Chinese) |
中文摘要 | 在都會區,屬中小型之隧道工程,例如較大口徑之電力管、自來水管、污水管等工程施 工,使用推管工法施工是極普遍的作法,為了能順利完成推進施工,配合地質狀況選擇適當 的機具是最重要的課題。但是,在都會區中,無論以潛盾工法或推管工法施工,仍經常會遭 遇過去施工之埋設物或異常之大石、枯木等等,事先未預期的障礙物,造成無法繼續推進的 案例。 在大樓密集的都會區進行推管工程或潛盾隧道發進,若因遭遇障礙物而使推進機具動彈 不得,而且已無法由隧道內處理時,採就地加開工作井取出障礙物是最直接、最快速的處理 方式,然而,如果受限於地形及地質的因素限制,例如交通維持、道路寬度、圍設圍籬空間 不足及鄰房安全等問題,則加該工作井之處理方式就有相當的困難度,甚或不可行。 信義線CR580B區段標工程於安和路站進行Ø1650㎜污水管推管施工時便遭遇到這樣的 難題,最終乃運用台灣首次引進之牽引工法得以順利解決,牽引工法簡單的說,就是將整組 推進機具連同已經安裝完成的RCP管一起往後牽引拉回工作井的方法,由於本次成功的以牽 引工法將推進機及污水管抽回,讓原本在台灣只有開挖工作井取出推進機方式之外,新增加 可選擇工法,當然,為了地面及建物安全的需要,在牽引的過程有許多要事先縝密規劃事項 及要謹慎執行的重點,本文內容即在摘述整個牽引工法歷程,而特別要說明的是,牽引工法 的運用也適合較大口徑潛盾隧道之牽引。 |
英文摘要 | In urban areas the pipe jacking method is commonly used for small- and medium-sized tunnel construction, such as construction of larger size electricity conduits, water pipes, and sewage pipes, etc. In order to complete the pipe jacking construction smoothly, selecting a suitable machine conforming to the geological conditions is the most important concern. However, in urban areas, no matter whether the shield driving method or pipe jacking method is adopted, it often occurs that the machine becomes stuck as the result of encountering unexpected obstructions, such as abandoned construction objects, unusually big stones, withered pieces of wood, etc. In a congested urban area, if the driving machine is stuck as the result of encountering obstructions in the process of shield driving or pipe jacking and the obstructions can not be removed from the inside of the tunnel, the most direct and fastest reinstatement method is to construct a temporary shaft above or in front of the machine and then take out the obstruction(s) directly. However, this recovery method is quite difficult. It is not even applicable if a temporary shaft cannot be constructed due to topographic or geological limitations, such as traffic diversion, road width, insufficient fenced area, and adjacent building safety, etc. Theφ1650 mm sewage pipe jacking construction on Anhe Rd. Station of Xinyi MRT line's CR580 project encountered the above-mentioned difficulties. They were solved by using the “pull back method.”The method, applied in Taiwan for the first time, put simply, is to pull back the pipe jacking machine with RC pipes having been installed in the work shaft behind it. Thanks to the success of the method in pulling back the machines and sewage pipes for the first time in Taiwan, it provides an additional option to the current method which is to remove obstructions only from an excavated shaft. Of course, for the safety of adjacent buildings and roads, the method requires deliberate advance planning and careful execution during construction. This article details the entire process of the“pull back method” and to highlight particularly that the method is also applicable on a large size shield tunnel. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。