| 浅埋双连拱隧道进洞口管棚预支护参数分析 |
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| 引用本文： | 毕俊丽,王伟锋,刘昌林.浅埋双连拱隧道进洞口管棚预支护参数分析[J].隧道建设,2008,28(4):438. |
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| 作者姓名： | 毕俊丽 王伟锋 刘昌林 |
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| 作者单位： | 1. 中铁隧道勘测设计院有限公司2. 北京城建设计研究总院有限责任公司3. 洛阳市人防开发管理处 |
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| 摘 要： | 复杂地质条件下浅埋双连拱隧道围岩压力通常是不对称的，特别是隧道围岩十分软弱时更为明显。偏压作用对于围岩的稳定性产生较大影响。采用三维弹塑性有限差分方法分析偏压双连拱隧道的管棚预支护作用。管棚效能的发挥不仅与其自身的参数设计及选择有根本关系，而且也与地层参数和隧道结构参数密不可分。针对该隧道的地质条件和管棚设计要求，对钢管环向间距、钢管直径、管棚在围岩中的剩余长度、管棚力学模型、开挖进尺长度5个方面影响因素进行分析，得出偏压双连拱隧道管棚应采用不平衡设计的结论。
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| 关 键 词： | 双连拱隧道偏压管棚参数有限差分法 |
| 收稿时间： | 2008-03-04 |
| 修稿时间： | 2008-05-14 |
Analysis on Parameters of Pipe Roof Advance Support Installed in Portal Sections of Shallow-buried Double-arched Tunnels |
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| BI Junli,WANG Weifeng,LIU Changlin.Analysis on Parameters of Pipe Roof Advance Support Installed in Portal Sections of Shallow-buried Double-arched Tunnels[J].Tunnel Construction,2008,28(4):438. |
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| Authors: | BI Junli WANG Weifeng LIU Changlin |
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| Institution: | 1. China Railway Tunnel Survey &|Design Institute Co. Ltd.2. Beijing Urban Engineering Design &|Research Institute Co., Ltd3. Development and Management Department of Air Defense Works of Luoyang |
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| Abstract: | Under complex geological conditions,the loading on the surrounding rock mass of shallow-buried double-arched tunnels is usually asymmetrical and it is particular the case when the surrounding rock mass of the tunnel is very weak.The asymmetrical loading has serious influence on the stability of the surrounding rock mass.In the paper,the advance support effect of the pipe roofs of asymmetrical-loaded double-arched tunnels is analyzed by three dimensional elastic-plastic finite difference method.The effect of... |
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| Keywords: | double-arched tunnel asymmetrical loading pipe roof parameter finite difference method |
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