| 引水隧道下穿铁路站场施工方案分析 |
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| 引用本文： | 张征亮.引水隧道下穿铁路站场施工方案分析[J].城市道桥与防洪,2023(6):172-175,225. |
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| 作者姓名： | 张征亮 |
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| 作者单位： | 江西省交通设计研究院有限责任公司 |
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| 摘 要： | 为明确隧道下穿铁路站场时最佳预加固方案，基于数值模拟，分析了超前小导管与超前长管棚两种超前预加固措施效果。结果表明：随着支护刚度的增加，地表沉降、拱顶沉降等不断减小。管棚支护刚度较大，注浆后能形成梁拱效应，有效改善围岩应力状态，控制围岩变形，可作为隧道下穿铁路轨道时超前支护推荐方案。
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| 关 键 词： | 数值模拟 预加固 地表沉降 梁拱效应 |
| 收稿时间： | 2022/6/26 0:00:00 |
| 修稿时间： | 2022/7/29 0:00:00 |
Analysis on Construction Scheme of Diversion Tunnel Passing through Railway Station and Yard |
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| zhangzhengliang.Analysis on Construction Scheme of Diversion Tunnel Passing through Railway Station and Yard[J].Urban Roads Bridges & Flood Control,2023(6):172-175,225. |
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| Authors: | zhangzhengliang |
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| Abstract: | In order to clarify the best pre-reinforcement scheme when the tunnel passes through the railway yard, based on numerical simulation, the effects of two advanced pre-reinforcement measures, namely the advanced small duct and the advanced short pipe shed, are analyzed. The results show that with the increase of support stiffness, the surface settlement and vault settlement decrease continuously. The rigidity of the pipe shed support is relatively large, and the beam-arch effect can be formed after grouting, which can effectively improve the stress state of the surrounding rock and control the deformation of the surrounding rock |
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| Keywords: | numerical simulation pre-reinforcement ground surface settlement beam-arch effect |
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