| 隧道洞口段开挖对相邻隧洞影响的数值分析 |
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| 引用本文： | 许德鹏,吴俊浩,李献民.隧道洞口段开挖对相邻隧洞影响的数值分析[J].路基工程,2015,0(2):148. |
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| 作者姓名： | 许德鹏 吴俊浩 李献民 |
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| 作者单位： | 1.中交一公局第一工程有限公司, 北京 102205 |
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| 基金项目： | 河南省交通厅科研项目:地下隧道对三维空间构筑物影响及分析评价系统研究，基于隧道监控量测的围岩稳定性信息管理分析系统研究 |
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| 摘 要： | 为研究麻武高速公路角儿尖隧道洞口段开挖对已支护相邻隧洞围岩稳定性的影响,依据角儿尖隧道地质情况,运用FLAC3D数值模拟软件进行模拟计算,并结合现场实测情况,对已支护相邻隧道围岩位移及应力演化规律进行了分析。结果表明:角儿尖隧道洞口段开挖对已支护相邻隧洞围岩变形影响较大,其影响比重在30%左右,实测约为15%;针对角儿尖隧道洞口段开挖过程,应尽量缩短进尺,并控制装药量,将相邻隧洞开挖对已支护隧道的影响降到最低。研究结果为洞口段支护措施优化提供了依据,供类似工程参考。
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| 关 键 词： | 角儿尖隧道 数值模拟 监控量测 相邻隧洞 洞口段 稳定性 |
| 收稿时间： | 2019-11-11 |
Numerical Simulation on Influence of Excavation in Tunnel Portal on Adjacent Tunnel |
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| Authors: | XU Depeng WU Junhao LI Xianmin |
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| Abstract: | In order to study how the excavation in portal section of Jiaoerjian Tunnel on Macheng-Wuxue Highway affects stability of the rock surrounding the adjacent tunnel which has been supported, this paper, according to the geological conditions thereof, made the simulation calculation with FLAC3D, a numerical simulation software, and in combination with the on-site measurements, analyzed the rules of the rock displacement and the stress evolution. The results show that the excavation in portal section of Jiaoerjian Tunnel makes relatively large impact on deformation of the rock surrounding the adjacent tunnel which has been supported with the impact weight about 30% and the measured value of 15%. During the excavation, it is better to shorten the footage and control the charges with every reasonable effort so as to reduce the impact herein to a maximum extent. The study results provide the basis for optimization of supporting measures for portal section, and can be for the reference to similar projects. |
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| Keywords: | Jiaoerjian Tunnel numerical simulation monitoring measurement adjacent tunnel portal section stability |
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