| 落石运动过程偏移与随机特性的试验研究 |
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| 引用本文： | 叶四桥,陈洪凯,唐红梅.落石运动过程偏移与随机特性的试验研究[J].中国铁道科学,2011,32(3). |
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| 作者姓名： | 叶四桥 陈洪凯 唐红梅 |
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| 作者单位： | 1. 重庆交通大学,岩土工程研究所,重庆,400074;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,400044
2. 重庆交通大学,岩土工程研究所,重庆,400074 |
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| 基金项目： | 国家自然科学基金资助项目，重庆市自然科学基金资助项目，重庆交通大学青年科学基金资助项目 |
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| 摘 要： | 通过112块不同形状、不同质量的落石现场滚落试验,发现落石形状、质量和运动模式对落石偏移比有显著影响.落石越接近球形、质量越大、运动模式越单一,其偏移比越小,反之则会出现较大的偏移比和横向威胁范围;试验中绝大部分落石的偏移比大于0.1,但均在0.3以内.鉴于此,建议在实际落石防护工程设计中落石偏移比取0.3,以控制落石横向威胁范围;或依据落石灾害危险性评价结果和可接受风险水平确定落石偏移比的取值.通过9块试验条件近似的落石试验表明,落石运动过程充满随机性,在落石运动路径计算方法中应考虑落石运动过程随机特性的影响,这对于落石灾害威胁区域的划定和被动防治系统的布置非常重要.
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| 关 键 词： | 落石 偏移特性 随机特性 |
Research on the Offset and Random Characteristics of the Rockfall during the Falling Process by Field Tests |
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| YE Siqiao,CHEN Hongkai,TANG Hongmei.Research on the Offset and Random Characteristics of the Rockfall during the Falling Process by Field Tests[J].China Railway Science,2011,32(3). |
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| Authors: | YE Siqiao CHEN Hongkai TANG Hongmei |
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| Institution: | YE Siqiao1,2,CHEN Hongkai1,TANG Hongmei1(1.Institute of Geotechnical Engineering,Chongqing Jiaotong University,Chongqing 400074,China,2.Key Laboratory for China Southwest Resource Exploitation and Environmental Disaster Control Engineering ofMinistry of Education,Chongqing University,Chongqing 400044,China) |
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| Abstract: | By the field tests on the falling process of 112 rockfall with different shape and quality,it was found that the shape,quality and movement mode of rockfall had significant effects on rockfall offset ratio.The more spherical shape,the larger quality and the lack of changes in its movement mode,the rockfall had smaller offset ratio.Vice versa,the rockfall had large offset ratio and transverse falling range.In the tests,the offset ratios of most rockfall were more than 0.1,but all of them were below 0.3.In vi... |
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| Keywords: | Rockfall Offset characteristics Randomness |
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