| 留核心土法开挖隧道拱顶的下沉规律分析 |
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| 引用本文： | 赖春华.留核心土法开挖隧道拱顶的下沉规律分析[J].交通标准化,2014(7):88-89,94. |
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| 作者姓名： | 赖春华 |
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| 作者单位： | 赣州诚正公路工程监理有限公司; |
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| 摘 要： | 通过模拟某软弱围岩隧道留核心土法开挖,分析了隧道拱顶下沉随掌子面推进的变化规律.计算结果表明：上弧形导坑开挖后,拱顶下沉速度快;掌子面推进约1倍洞径时,下沉速度变缓;推进约2倍洞径时,下沉速度明显放缓,总下沉量趋于稳定.计算结果与实测数据较吻合,研究成果可为相关工程提供参考.
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| 关 键 词： | 留核心土法 软弱围岩 围岩稳定性 拱顶下沉 |
Tunnel Vault Settlement Law with Leaving-Core-Soil Method |
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| LAI Chun-hua.Tunnel Vault Settlement Law with Leaving-Core-Soil Method[J].Communications Standardization,2014(7):88-89,94. |
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| Authors: | LAI Chun-hua |
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| Institution: | LAI Chun-hua (Ganzhou Integrity of Highway Engineering Supervision Co., Ltd., Ganzhou 341000, China) |
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| Abstract: | The law of vault subsidence with the change of working face advance is studied through the simu- lation of a weak surrounding rock tunnel excavation with leaving-core-soil method. Results show that the velocity of vault subsidence is high when the up arc pilot tunnel is excavated. When working face advanced about one time of the diameter hole, the speed gets lower. When working face advanced about two times of the diameter hole, sinking slows down obviously, and the total subsidence tends to be stable. The calculation results tallies with the measured data, and it can provide reference for related engineering. |
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| Keywords: | leaving-core-soil method weak surrounding rock stability of surrounding rock vault settlement |
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