| 大断面扩建隧道施工初期支护受力分析 |
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| 引用本文： | 晋学辉,程崇国.大断面扩建隧道施工初期支护受力分析[J].重庆交通大学学报(自然科学版),2011,30(4):751-754,777. |
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| 作者姓名： | 晋学辉 程崇国 |
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| 作者单位： | 1. 重庆交通大学土木建筑学院,重庆,400074
2. 招商局重庆交通科研设计院有限公司,重庆,400067 |
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| 摘 要： | 运用ANSYS有限元软件对重庆渝州隧道原位扩建施工进行数值模拟,计算得到隧道地表沉降、扩建隧道初期支护弯矩及锚杆轴力；对比分析了计算结果与监控量测数据,得出原位扩建浅埋隧道的地表沉降影响范围,发现隧道扩挖后围岩内力的重分布对扩挖方向初期支护弯矩和系统锚杆轴力影响较大；指出在设计和施工时应该加强扩挖方向围岩及结构的支护和...
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| 关 键 词： | 扩建隧道 初期支护 施工力学 数值模拟 监控量测 |
Support Mechanics Analysis of Enlarging Tunnel with Large Cross-section at Initial Construction Stage |
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| JIN Xue-hui,CHENG Chong-guo.Support Mechanics Analysis of Enlarging Tunnel with Large Cross-section at Initial Construction Stage[J].Journal of Chongqing Jiaotong University,2011,30(4):751-754,777. |
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| Authors: | JIN Xue-hui CHENG Chong-guo |
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| Institution: | 1.College of Civil & Architecture,Chongqing Jiaotong University,Chongqing 400074,China; 2.China Merchants Chongqing Communication Research & Design Institute,Chongqing 400067,China) |
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| Abstract: | The value of surface settlement and the value of the flexion and bolt axial force at the initial stage of tunnel lining were worked out by using the ANSYS FEM software to simulate the construction of the onsite expansion of Yuzhou Tunnel in Chongqing.The affected region of subsidence in expansion construction of shallow tunnels was worked out after comparing and analyzing the results of numerical simulation and the monitoring values.The result reflects that the redistribution of rock internal force has comparatively large effect at the initial construction stage of flexion and the bolt axial force in extension region.As a result,more strength support and monitoring for this region are needed during the design and construction period. |
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| Keywords: | enlarge tunnel initial support construction mechanics numerical simulation monitoring measurement |
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