| 西南山区某铁路隧道口高位落石三维运动特征分析 |
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| 引用本文： | 王栋,王剑锋,李天斌,曾鹏,马俊杰,陈伟.西南山区某铁路隧道口高位落石三维运动特征分析[J].地质力学学报,2021,27(1):96-104. |
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| 作者姓名： | 王栋 王剑锋 李天斌 曾鹏 马俊杰 陈伟 |
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| 作者单位： | 1.中铁二院工程集团有限责任公司, 四川 成都 610031 |
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| 基金项目： | 四川省科技厅重点研发项目（2019YFG0460）；中铁二院工程集团有限公司科研项目（科2017-10）；中国铁路总公司科技研究开发计划课题（2017G008-F） |
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| 摘 要： | 西南山区某铁路隧道口上部广泛分布着高位危岩体，对下部隧道建（构）造物具有严重的威胁。采用Rockfall Analyst软件对该隧道上部五类不同尺寸的高位危岩体进行三维运动轨迹数值模拟，研究表明:研究区的高位危岩落石具有弹跳高度大、速度快、冲击能量高的特点；弹跳高度、运动速度与危岩落石的质量无关，冲击能量大小与落石质量成正比。分析表明:该地区高位危岩体的防护应避免单一防护措施，建议综合使用多种防护措施。
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| 关 键 词： | 危岩 高位落石 运动特征 隧道口 防护 |
| 收稿时间： | 2019/10/13 0:00:00 |
| 修稿时间： | 2020/6/13 0:00:00 |
Analysis of three-dimensional movement characteristics of rockfall: A case study at a railway tunnel entrance in the southwestern mountainous area, China |
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| WANG Dong,WANG Jianfeng,LI Tianbin,ZENG Peng,MA Junjie,CHEN Wei.Analysis of three-dimensional movement characteristics of rockfall: A case study at a railway tunnel entrance in the southwestern mountainous area, China[J].Journal of Geomechanics,2021,27(1):96-104. |
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| Authors: | WANG Dong WANG Jianfeng LI Tianbin ZENG Peng MA Junjie CHEN Wei |
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| Institution: | 1.China Railway Er-yuan Engineering Group Co. Ltd, Chengdu 610031, Sichuan, China2.College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, Sichuan, China3.State Key Laboratory of Geohazard Prevention and Geo-environment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China |
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| Abstract: | High unstable rock masses are widely distributed in the upper part of a railway tunnel entrance in the southwestern mountainous area, which causes serious hazards to the construction of the lower tunnel. The Rockfall Analyst software was used to simulate the three-dimensional movement track of five kinds of high unstable rock masses in the upper part of the tunnel, and it shows that the rockfalls in the study area have the characteristics of high bounce height, fast speed and high impact energy. There is no relation between the bounce height, the movement speed and the mass of rockfall, while the impact energy is proportional to the mass of rockfall. The analysis shows that multiple and comprehensive protective measures should be recommended for the protection of unstable rock masses in this area instead of single protective measure. |
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| Keywords: | unstable rock mass rockfall movement characteristics tunnel entrance protection |
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