| 大跨软岩隧道开挖围岩稳定性研究 |
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| 引用本文： | 钱发琪.大跨软岩隧道开挖围岩稳定性研究[J].贵州大学学报(自然科学版),2013(6):134-137. |
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| 作者姓名： | 钱发琪 |
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| 作者单位： | 贵阳市水利交通发展投资（集团）有限公司,贵州贵阳550081 |
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| 基金项目： | 贵州省教育厅青年项目,黔教高发[2007]321号 |
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| 摘 要： | 采用ABAQUS软件，建立某大跨软弱围岩隧道的三维模型。结合监控测量数据，研究了隧道开挖扰动区域的时空分布特征。结果表明，拱顶下沉计算值与实测值随时间的变化规律基本一致，均在20d时趋于稳定。隧道开挖卸荷扰动影响范围在掌子面前方约1．2倍洞跨，掌子面后方拱顶沉降最终稳定时距掌子面距离约为1．5倍洞跨。
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| 关 键 词： | 大跨软岩隧道 围岩稳定性 数值模拟 |
Study on the Stability of Surrounding Rock in Soft Rock Tunnel with Large-Span |
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| QIAN Fa-qi.Study on the Stability of Surrounding Rock in Soft Rock Tunnel with Large-Span[J].Journal of Guizhou University(Natural Science),2013(6):134-137. |
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| Authors: | QIAN Fa-qi |
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| Institution: | QIAN Fa-qi (Guiyang Water Resources ＆ Transportation Development Investment Group Co. , Ltd, Guiyang 550001, China) |
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| Abstract: | By using the ABAQUS finite element program, three-dimensional model of a soft rock tunnel with large-span was established. Combining the monitoring data, spatial and temporal distribution characteristic of ex- cavation disturbed zone was studied in this paper. The conclusions indicate that the calculated results of the vault settlement with time are consistent with monitoring ones, which tends towards stability at 20 days. Excavation-in- duced disturbed zone of the tunnel is about 1.2 times of the tunnel spans in front of the heading face, and 1.5 times of the tunnel spans behind the tunnel face. |
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| Keywords: | soft rock tunnel with large-span stability of surrounding rock numerical simulation |
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