| 高地应力状态下硬质碎裂岩隧道变形机理研究 |
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| 作者单位： | ;1.兰州铁道设计院有限公司 |
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| 摘 要： | 高地应力状态下硬质岩隧道产生岩爆,软质岩隧道产生大变形,在山区隧道建设中会经常遇到,也进行过大量的研究,但关山隧道硬质闪长岩在施工中遇到罕见的、特殊的大变形问题。通过对隧道区地质环境背景、岩石成分、岩体结构面特征、原地应力大小研究,配合理论分析,直观地解释硬质碎裂围岩的变形破坏特征与机理,为采取经济、合理的支护措施提供依据,隧道变形控制良好。
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| 关 键 词： | 铁路隧道 硬质岩 碎裂 大变形 |
Deformation Mechanism of Hard Cataclastic Rock Tunnel under High Geostress |
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| Institution: | ,Lanzhou Railway Survey and Design Institute Co.,Ltd. |
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| Abstract: | The hard rock tunnel with high geostress may encounter rockburst and the soft rock tunnel with high geostress may suffer large deformation,which happen frequently in mountain tunnel construction.Many researches have been conducted and the large hard flash rock deformation in Guanshan tunnel construction is exceptionally a rare case. This paper intuitively expounds the features and mechanism of deformation and failure of the hard cataclastic surrounding rock mass based on the study of the geological environmental background,rock composition,rock mass structure and characteristics,in-situ stress in the tunnel area and on the theoretical analysis,which provides a basis for taking economic and reasonable support measures to control tunnel deformation. |
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| Keywords: | Railway tunnel Hard rock Cataclastic Large deformation |
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