Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference

DU Ju-hong; HUANG Hong-wei

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Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference

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- Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference
- Vol. 28, Issue S1, (2007)
- 作者机构：
  
  同济大学地下建筑与工程系,上海,200092
- 作者简介：
- 基金信息：
- DOI：
  CLC： U451
- Online First：28 March 2014，
  
  Published：2007
- 稿件说明：
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DU Ju-hong, HUANG Hong-wei. Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference[J]. 2007, 28(S1).
DOI：

DU Ju-hong, HUANG Hong-wei. Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference[J]. 2007, 28(S1). DOI：

摘要

以云南平年隧道为工程背景，采用MARC三维非线性有限元法程序，对新奥法修建的偏压、错台、浅埋小间距隧道模拟了先行隧道不同超前距离情况下的动态施工过程。掌子面距离的变化对洞室的横向位移的影响大于竖向位移，且对于左洞更为显著；随着左右洞掌子面距离的增大，洞周位移、中间岩柱位移均减小，但部分范围内地表沉降值有所增大，局部区域受力、变形恶化。

Abstract

Taking Pingnian Tunnel in Yunnan

which is the bias closely spaced and shallow twin tunnel with altitude difference in two tunnels and constructed by using NATM

as the engineering background and applying MARC finite element software

non-linear three dimensional numerical simulation of construction process under different lagging distance between the twin tunnel excavated faces is performed. It is found that the change of the excavated face distance has a stronger influence on the horizontal displacement than on the vertical displacement of each tunnel

and especially for the left tunnel. Longer of excavated face distance is

smaller displacements at tunnel periphery and pillar is larger than the ground surface settlement in the special area

and more deteriorative for some zone.

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