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| 缓倾角层理各向异性岩体隧道稳定性的物理模型试验研究 | |
| 引用本文： | 李丹,夏彬伟,陈浩,白世伟.缓倾角层理各向异性岩体隧道稳定性的物理模型试验研究[J].岩土力学,2009,30(7):1933-1938. |
| 作者姓名： | 李丹 夏彬伟 陈浩 白世伟 |
| 作者单位： | 1. 武汉科技大学,城市建设学院,武汉,430065;中国科学院武汉岩土力学研究所,武汉,430071 2. 重庆大学,西南资源开发及环境灾害控制工程教育部重点实验室,重庆,400030 3. 中国科学院武汉岩土力学研究所,武汉,430071 |
| 摘 要： | 层状岩体的广泛分布是地下工程无法回避的现实。以渝湘高速公路共和隧道为工程背景，采用自行研制的弹脆性模型相似材料，制作出层状岩体隧道模型。采用大型真三轴岩土工程模型试验机进行加载试验，采用围岩应变监测、洞室内窥摄影、试件破坏形态的研究与分析，从而对缓倾角层理岩体中隧道的二次应力分布特征及破坏机制进行研究。试验中还通过超载系数，提供了一个安全储备的定量评估指标。试验的破坏特征与隧道实际破坏一致，说明了模型试验的正确性，同时也为顺层偏压隧道的加固机制研究及加固设计提供了试验基础。 |
| 关 键 词： | 物理模型试验 大型真三轴岩土工程模型试验机 模型相似材料 弹脆性 层状岩体 超载系数 |
| 收稿时间： | 2007-12-04 |
Research on stability of tunnel in anisotropic layered rockmass with low inclination angle bedding by model test |
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| LI Dan,XIA Bin-wei,CHEN Hao,BAI Shi-wei.Research on stability of tunnel in anisotropic layered rockmass with low inclination angle bedding by model test[J].Rock and Soil Mechanics,2009,30(7):1933-1938. | |
| Authors: | LI Dan XIA Bin-wei CHEN Hao BAI Shi-wei |
| Institution: | 1.College of Urban Construction ,Wuhan University of Science and Technology, Wuhan 430065, China; 2. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 3. China Education Ministry’s Key Laboratory for the Exploitation of Southwest Resources and the Environmental Disaster Control Engineering, Chongqing University, Chongqing 400030, China |
| Abstract: | Wide contribution of layered rockmass cannot be avoided in underground construction. Based on the Gonghe tunnel in Yuxiang Highway a physical model for layered rockmass is made adopting elastobrittle simulated material which is developed independently. Loading through the large scale real triaxial geotechnical engineering testing machine, the configuration trait of secondary stress and failure mechanisms of layered rockmass tunnel with low inclination angle are presented. Various failure mechanisms present in various place via the strain in surrounding rock, inner video and failure configuration around the tunnel. The test provides a quantitative evaluating index for safety storage with overload coefficient. The failure in the test is consistent with the practical tunnel which validates the anisotropic model and provides a foundation for the research on reinforcing mechanism and reinforcing design of tunnels in layered anisotropy rockmass. |
| Keywords: | physical model test large scale real triaxial physical model testing machine model simulation material elastobrittle layered rockmass overload coefficient |
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