| 偏压小间距公路隧道施工的三维数值模拟 |
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| 引用本文： | 杜菊红,黄宏伟.偏压小间距公路隧道施工的三维数值模拟[J].岩土力学,2007,28(Z1):531-535. |
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| 作者姓名： | 杜菊红 黄宏伟 |
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| 作者单位： | 同济大学 地下建筑与工程系，上海 200092 |
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| 基金项目： | 云南省交通厅科研项目（No.TST（2004）538119B）；教育部“新世纪优秀人才支持计划”（No.NECT-04-0368）。 |
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| 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。
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| 关 键 词： | 小间距隧道 三维数值模拟 新奥法 掌子面距离 |
| 收稿时间： | 2007-05-31 |
Three-dimensional numerical simulation of construction for bias closely spaced tunnels with altitude difference |
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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].Rock and Soil Mechanics,2007,28(Z1):531-535. |
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| Authors: | DU Ju-hong HUANG Hong-wei |
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| Institution: | Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China |
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| 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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| Keywords: | unsymmetrical loadings 3D numerical simulation NATM excavated faces distance |
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