| 分岔隧道过渡段稳定性研究 |
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| 引用本文： | 蔚立元,李术才,郭小红,史世波.分岔隧道过渡段稳定性研究[J].中国公路学报,2011(1). |
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| 作者姓名： | 蔚立元 李术才 郭小红 史世波 |
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| 作者单位： | 山东大学岩土与结构工程研究中心;中国矿业大学力学与建筑工程学院;中交第二公路勘察设计研究院有限公司; |
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| 基金项目： | 国家自然科学基金项目(40872203); 国家杰出青年科学基金项目(50625927) |
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| 摘 要： | 采用数值分析和地质力学模型试验2种手段对分岔隧道中四车道大拱段和连拱段、连拱段和小净距段2个过渡段进行了研究,并在工程现场对关键断面进行了监控量测;数值分析采用的是有限单元法,在模型试验中研发了组合式三维地质力学模型试验系统和铁晶砂胶结相似材料;对3种手段的结果进行比较分析。结果表明:从横向来看,过渡段拱顶、中隔墙和中隔岩柱等部位受隧道开挖的影响较大;从纵向来看,过渡段Ⅱ比过渡段Ⅰ危险。
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| 关 键 词： | 隧道工程 分岔隧道 模型试验 过渡段 监控量测 数值分析 |
Study of Stability of Transition Segment for Bifurcation Tunnel |
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| YU Li-yuan,LI Shu-cai,GUO Xiao-hong,SHI Shi-bo.Study of Stability of Transition Segment for Bifurcation Tunnel[J].China Journal of Highway and Transport,2011(1). |
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| Authors: | YU Li-yuan LI Shu-cai GUO Xiao-hong SHI Shi-bo |
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| Institution: | YU Li-yuan1,2,LI Shu-cai1,GUO Xiao-hong3,SHI Shi-bo3(1.Geotechnical and Structural Engineering Research Center,Shandong University,Jinan 250061,Shandong,China,2.School of Mechanics & Civil Engineering,China University of Mining and Technology,Xuzhou 221116,Jiangsu,3.CCCC Second Highway Consultants Co,Ltd,Wuhan 430056,Hubei,China) |
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| Abstract: | The methods of numerical analysis and geomechanics model were used to simulate the excavation of the two transition segments,i.e.large-span-tunnel to multi-arch-tunnel and multi-arch-tunnel.Key section on construction spot was monitored.Finite element method was applied to numerical analysis,while the combined type 3-D geomechanical model test system and iron barites sand cementation material(IBSCM) were developed in model test.The results of site monitoring measurement by three methods were compared.Result... |
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| Keywords: | tunnel engineering bifurcation tunnel model test transition segment monitoring measurement numerical analysis |
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