Double-O-Tube shield tunneling for Taoyuan International Airport Access MRT
Double-O-Tube shield tunneling for Taoyuan International Airport Access MRT
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DOI：
10.1016/j.tust.2012.03.001
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发表时间：
2012-07-01
影响因子：
6.9
通讯作者：
Shiu, Yu-Fen
中科院分区：
文献类型：
--
作者：
Fang, Yung-Show;Kao, Chung-Cheng;Shiu, Yu-Fen
从1989年到2010年，世界上已有20个隧道工程采用双圆管(DOT)盾构法施工。介绍桃园国际机场通道(TIAA)快速轨道交通(MRT)系统建设中的DOT盾构隧道施工。台湾首条DOT隧道采用直径6.42m、宽11.62m的DOT盾构机施工。现场数据显示，在整个隧道施工过程中，DOT盾构的滚动角在+0.23度至-0.39度之间变化，这在TIAA捷运和上海地铁提出的+0.6度至-0.6度的极限设计值范围内。在东京、上海和台北采集的6个地表沉降槽中，DOT盾构隧道施工引起的地面损失在0.23%~1.30%之间，平均为0.78%。与单圆形土压平衡盾构在粘性土中的地面损失相比，DOT盾构的地面损失范围相对较窄，峰值地面损失量明显小于单圆形土压平衡盾构法。采用DOT法进行地下开挖，可使隧道开挖工期延长约32%。使用DOT盾构施工的隧道每米成本大约是使用单圆形盾构施工的1.5倍。盾构机和管片衬砌的造价分别占隧道总造价的23%和53%。昂贵的DOT盾构机和复杂的DOT衬砌管片的制造和组装是隧道施工成本较高的主要原因。然而，这将花费更多的预算，而且在河底单圆形隧道之间挖掘三条交叉通道的风险也要大得多。(C)2012爱思唯尔有限公司。保留所有权利。
From 1989 to 2010, 20 tunneling projects have been carried out with the Double-O-Tube (DOT) shield tunneling method in the world. In this paper, the DOT shield tunneling for the construction of Taoyuan International Airport Access (TIAA) Mass Rapid Transit (MRT) system is introduced. A 6.42 m-diameter, 11.62 m-wide DOT shield machine was used to build the first DOT tunnel in Taiwan. Field data indicated that, throughout the tunneling operation, the rolling angle of the DOT shield varied between +0.23 degrees and -0.39 degrees, which was within the limiting design values of +0.6 degrees and -0.6 degrees proposed by both TIAA MRT and Shanghai Metro. For the six surface settlement troughs collected from Tokyo, Shanghai and Taipei, the ground loss due to DOT shield tunneling ranged from 0.23% to 1.30%, and the average ground loss was 0.78%. As compared with the ground loss due to single-circular Earth-Pressure-Balance (EPB) shield tunneling in cohesive soils, the range of ground loss due to DOT shield tunneling was relatively narrow, and the peak ground loss value was significantly less. Underground excavation with the DOT tunneling method would increase the tunneling duration for about 32%. The cost per meter of tunnel constructed with a DOT shield was about 1.5 times that constructed with single-circular shields. The cost of shield machine and segment lining were 23% and 53% of the total tunneling costs respectively. The expensive DOT shield machine and the complicated manufacturing and assembly of DOT lining segments are the main reasons for higher cost of tunneling. However, it would cost a lot more budget and it would be much more risky to excavate three cross-passages between the single-circular tunnels under the river. (c) 2012 Elsevier Ltd. All rights reserved.