| 盾构施工参数对地层变形的影响 |
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| 引用本文： | 赵振伟,吴波,黄惟,叶永茂,陶家顺,李展峰.盾构施工参数对地层变形的影响[J].福建工程学院学报,2015,0(3):205-208. |
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| 作者姓名： | 赵振伟 吴波 黄惟 叶永茂 陶家顺 李展峰 |
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| 作者单位： | 福建工程学院土木工程学院 |
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| 摘 要： | 以南宁地铁一号线南湖段下穿隧道为工程背景，建立隧道开挖的三维有限元模型，通过数值分析，得到盾构施工过程中地层变形的分布规律，讨论盾构施工过程中注浆压力对地表沉降、水平位移及拱顶位移的影响，分析掌子面压力对地表隆起的影响规律。研究结果表明，注浆压力对地表变形会产生明显的影响，随着注浆压力的增大，地表沉降及水平位移明显减小。当掌子面压力大于0.1 MPa时，会引起掌子面前方土体产生向上的位移,地表隆起量随掌子面压力的增加而增大。
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| 关 键 词： | 盾构掘进 地面沉降 水平位移 三维有限元 数值模拟 |
The effect of parameters of shield tunnel construction on soil deformation |
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| Zhao Zhenwei,Wu Bo,Huang Wei,Ye Yongmao,Tao Jiashun,Li Zhanfeng.The effect of parameters of shield tunnel construction on soil deformation[J].Journal of Fujian University of Technology,2015,0(3):205-208. |
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| Authors: | Zhao Zhenwei Wu Bo Huang Wei Ye Yongmao Tao Jiashun Li Zhanfeng |
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| Institution: | College of Civil Engineering, Fujian University of Technology |
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| Abstract: | A 3D finite element model of tunnel excavation was established based on the tunnel construction of Nanning subway line 1 through Nan Lake in Guangxi province. The distribution law of stratum deformation in shield tunnel construction was simulated with finite element analysis (FEA) method. The influences of grouting pressure on surface settlement and the pressure of tunnel face in shield tunnel construction were discussed, including the ground surface settlement, the horizontal displacement, arch top displacement (deformation of arch and the upward movement of ground surface). The results show that the grouting pressure has significant impact on ground surface deformation. The ground surface settlement and the horizontal displacement decrease obviously with the increase of the grouting pressure. When the pressure of the tunnel face is greater than 0.1 MPa, upward soil displacement is produced in the front of the tunnel face and the apophysis grows with the increase of the pressure. |
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| Keywords: | shield tunnel excavation ground surface settlement horizontal displacement 3D finite element numerical simulation |
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