| 水平层状围岩隧道顶板变形特征及机理分析 |
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| 引用本文： | 闫永杰,翁其能,吴秉其,田卫明. 水平层状围岩隧道顶板变形特征及机理分析[J]. 重庆交通大学学报(自然科学版), 2011, 0(Z1): 647-649 |
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| 作者姓名： | 闫永杰 翁其能 吴秉其 田卫明 |
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| 作者单位： | 中交路桥南方工程有限公司;重庆交通大学岩土工程研究所;重庆交通大学土木建筑学院 |
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| 摘 要： | 隧道在开挖过程中,经常会经过水平层状围岩,这将给隧道施工带来很大的困难,造成安全事故.通过对水平层状围岩隧道顶板变形特征及机理分析得出:水平层状围岩在隧道顶板层面薄弱带附近由于不同步弯曲沉降产生分离,形成离层;水平岩层软硬相间,层间黏结力较差,隧道开挖后拱顶围岩稳定性较差,拱顶失稳几率较大;对于水平层状围岩地区要做好塌...
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| 关 键 词： | 水平层状围岩 张裂破坏、 变形 离层 控制措施 |
Analysis of Roof Deformation Characteristics and Mechanism in Horizontal Layer Rock Tunnel |
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| YAN Yong-jie,WENG Qi-neng,WU Bing-qi,TIAN Wei-ming. Analysis of Roof Deformation Characteristics and Mechanism in Horizontal Layer Rock Tunnel[J]. Journal of Chongqing Jiaotong University, 2011, 0(Z1): 647-649 |
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| Authors: | YAN Yong-jie WENG Qi-neng WU Bing-qi TIAN Wei-ming |
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| Affiliation: | 1.Road & Bridge International Co.Ltd.,South Branch Co.Ltd.,Beijing 101121,China; 2.Institute of Geolechnical Engineering,Chongqing Jiaotong University,Chongqing 400074,China; 3.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | The tunnel is often being tunneled through horizontal layer surrounding rock in process;which will bring great difficulties in the tunnel construction,causing accidents.Through the analysis of roof deformation characteristics and mechanism in horizontal layer rock tunnel,this paper concludes that the horizontal layer surrounding rock tunnel near roof level sync due to weak produced separation,bending settlement formed delamination.Levels between layers alternate with hard and soft rock strata and unbond force is poor,and the stability of surrounding rock tunnel excavation vault is poor.After tunneling,it's more likely to increase vaults' instability.For horizontal layer surrounding areas,we must complete collapse prevention and early treatment,and prevention is the main part.When the accident happens,proper measures should be done to reduce personnel casualties. |
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| Keywords: | horizontal layer surrounding rock rifting damage deformation separation control measures |
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