ANALYSIS OF SETTLEMENT PATTERN DUE TO DOT-TUNNELLING IN SOFT DEPOSIT

机译：浅埋点隧道掘进的沉降规律分析

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Double-O-Tube (DOT) shield machine can build two circular tunnels at the same time. The DOT machine has the shape of dumbbell and it is much wider than single circular shield tunnel (SCST) machine. DOT's moving control and tail grouting during construction is different from SCST. These differences will cause different distribution pattern of surface settlement. Finite element method is adopted to analyze surface settlement due to DOT-tunnel construction. This paper compares the surface settlement due to DOT construction,with SCST with the same cross section area and twin single circular tunnel (TSCT) with the same diameter. The calculated results show that the maximum settlement of DOT tunnel is about 1.5 times of SCST and is about 1.6 times of TSCT. The width of settlement trough of DOT-tunnel is about 1.2 times of SCST. Moreover, the rolling correction during DOT-tunnel construction causes asymmetry settlement trough and additional settlement.

机译：Double-O-Tube（DOT）盾构机可以同时建造两个圆形隧道。 DOT机器具有哑铃形状，并且比单圆盾构隧道（SCST）机器宽得多。 DOT在施工过程中的移动控制和尾注浆与SCST不同。这些差异将导致表面沉降的分布方式不同。采用有限元法分析了DOT隧道施工引起的地表沉降。本文比较了DOT结构，具有相同横截面积的SCST和具有相同直径的双单圆隧道（TSCT）引起的表面沉降。计算结果表明，DOT隧道的最大沉降量约为SCST的1.5倍，约为TSCT的1.6倍。 DOT隧道的沉降槽宽度约为SCST的1.2倍。此外，DOT隧道施工期间的滚动校正会导致不对称沉降槽和附加沉降。

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来源
《Sino-Japan Geotechnical Symposium November; 20071104-07; Chongqing(CN)》|2007年|P.501-506|共6页
会议地点 Chongqing(CN)
作者
SHUILONG SHEN; YESHUANG XU; JINHUI ZHANG; TINGPING LI;
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作者单位

Department of Civil Engineering, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao Tong University, Shanghai 2003, China;

Department of Civil Engineering, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao To;

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原文格式 PDF
正文语种 eng
中图分类土力学、地基基础工程;
关键词
DOT; Single Circular Tunnel; Twin Single Circular Tunnel; Rolling Correction; Surface Settlement;

机译：DOT;单圆隧道;双单圆隧道;滚动矫正;表面沉降;

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ANALYSIS OF SETTLEMENT PATTERN DUE TO DOT-TUNNELLING IN SOFT DEPOSIT

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