| 黏性泥石流沟道侵蚀启动机制研究 |
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| 引用本文： | 何思明,吴 永,李新坡.黏性泥石流沟道侵蚀启动机制研究[J].岩土力学,2007,28(Z1):155-159. |
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| 作者姓名： | 何思明 吴 永 李新坡 |
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| 作者单位： | 1. 中国科学院山地灾害与地表过程重点实验室，成都 610041；2. 中国科学院水利部成都山地灾害与环境研究所，成都 610041 |
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| 基金项目： | 国家自然科学基金项目（No.40572158）；交通部西部科技项目：国道317线西藏段公路边坡病害超前诊断及处治技术研究。 |
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| 摘 要： | 黏性泥石流具有非常强的侵蚀能力，在其运动过程中不断地对沟道进行下蚀和侧蚀，并将沟道中大量的松散物质带走，增大了泥石流的危害性。根据黏性泥石流本构模型和土体抗剪强度理论，以极限分析的上限定理为工具，在假定沟床以圆弧面侵蚀的条件下，研究了黏性泥石流运动对沟道土体的侵蚀启动机制，建议了相应的计算公式和判断准则，讨论了泥石流重度、沟道坡降、土体强度等因素对沟道土体受泥石流侵蚀启动速度的影响。
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| 关 键 词： | 上极限定理 泥石流 沟道 侵蚀启动 |
| 收稿时间： | 2007-05-30 |
Research on eroded start mechanism of channel debris flow |
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| HE Si-ming,WU Yong,LI Xin-po.Research on eroded start mechanism of channel debris flow[J].Rock and Soil Mechanics,2007,28(Z1):155-159. |
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| Authors: | HE Si-ming WU Yong LI Xin-po |
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| Institution: | 1. Key laboratory of Mountain Hazard and Surface Process, Chinese Academy of Sciences, Chengdu 610041, China; 2. Chengdu Research Institute of Environment and Disaster in Mountationous Regions Chinese Academy of Sciences, Chengdu 610041, China |
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| Abstract: | The viscous debris flow has a very strong eroded ability. It can erode a large amount of loose matters by its constantly erosion or lateral erosion and take them away during its flowing process, which makes it become more dangerous. According to the debris flow constitutive model and soil shear strength theory, take the upper bound theorem used in limit analysis as measure, and under the condition of assuming the erosion surface as arc, the startup mechanism of corroding to the ditch is studied. Then the corresponding calculating formula and judging criteria are suggested. At last, the influence of some factors on the erosion start velocity, such as the gravity, the falling gradient, the strength of the soil and so on, is discussed intensively. |
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| Keywords: | upper limit theorem debris flow eroded start |
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