英文篇名
Summary for the Analysis of The Taipei Mrt Double O Tube Bored Tunnel
作者
朱旭、陳俊宏、林建華、姚賜麟
關鍵字
雙圓型(DOT)潛盾隧道,錯縫拼接
摘要
本文針對臺灣桃園國際機場聯外捷運系統三重至台北車站段興建計畫首次引進雙圓型(DOT)潛盾隧道工法,介紹雙圓型潛盾隧道之分析過程、使用參數與分析模式。由於雙圓型潛盾隧道之環片型式除原有的圓弧形環片外,尚有稱之為海鷗片之特殊環片與分隔上下行隧道的中柱環片,此三類環片各有其不同的設計考量。雙圓型潛盾隧道分析的特點在於使用梁-彈簧模式做為分析的方法,除設置環片(曲梁元素)及土壤彈簧外,並將環片接頭之直螺栓以旋轉彈簧與剪切彈簧模擬,且合併考量隧道錯縫拼接的效果,使隧道設計最佳化。另外新工法的引進難免需要克服人為及環境所帶來的困難,僅以本文作概略描述期能為台灣潛盾工法開拓新里程碑。
英文摘要
This document provides information on the working method for the Double O-Tube (DOT) bored tunnel, used for the first time, for the Sanchong to Taipei Main Station section of the Taiwan Taoyuan International Airport Access MRT System Construction Project. It introduces the process and method of analysis, as well as the parameters used, for the DOT bored tunnel design. As the shape of the lining segments of DOT bored tunnels differ from that of original circular segments, special segments are used – including the so-called ‘seagull segment’, as well as a center column segment separating the tunnels’ up and down tracks. Each of these three types of lining segments has different design considerations. The special characteristic of the DOT bored tunnel is the use of the beam-spring model for the method of analysis. Besides setting curve beams for linings and soil springs, the rotational springs and shear springs are used for simulating segment connections to represent staggered effect. Thus the tunnel is optimally designed. Nonetheless, the new method inevitably calls upon the need for mitigation of difficulties arising from the actions of people and the environment. This document is only a summary, but it is hoped that new doors will thus be opened for the next milestone in Taiwan’s tunneling methods.