| 平顶形边坡开挖剪滑段确定及对坡体稳定性的影响 |
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| 引用本文： | 邵江,谢红强,周德培.平顶形边坡开挖剪滑段确定及对坡体稳定性的影响[J].岩土力学,2007,28(2):386-390. |
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| 作者姓名： | 邵江 谢红强 周德培 |
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| 作者单位： | 1. 西南交通大学,土木工程学院,成都,610031;四川省交通厅公路设计研究院,成都,610041
2. 西南交通大学,土木工程学院,成都,610031 |
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| 摘 要： | 对公路的平顶形边坡开挖进行了受力分析，提出了确定坡脚剪滑段的方法，指出在剪滑段范围内岩土体的抗剪强度降低，从而导致坡体稳定性下降。实例表明，在考虑剪滑段力学性质差异的情况下，通过极限平衡法搜索的最危险滑动面退化为次危险滑动面，且坡面分阶对坡脚应力集中的消散作用。
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| 关 键 词： | 平顶形边坡 剪滑段 应力集中 台阶形边坡 |
| 文章编号： | 1000-7598-（2007）02-0386-05 |
| 收稿时间： | 2005-04-11 |
| 修稿时间： | 2005-04-11 |
Determination of shear sliding section and its effect on stability of flathead shaped excavated slope |
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| SHAO Jiang,XIE Hong-qiang,ZHOU De-pei.Determination of shear sliding section and its effect on stability of flathead shaped excavated slope[J].Rock and Soil Mechanics,2007,28(2):386-390. |
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| Authors: | SHAO Jiang XIE Hong-qiang ZHOU De-pei |
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| Institution: | 1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China; 2. The Highway Planning, Survey, Degign and Research Institute Sichuan Department of Communications, Chengdu 610041, China |
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| Abstract: | Stress analysis of flathead shaped slope in highway excavated slope is conducted with advancing exterminating methods of shear sliding section at the toe of slope,and pointing out that in the range of shear sliding section,depressed shear strength of geotechincal mass will result in knock-down of slope stability.Examples show that with consideration of differences of mechanical properties in shear sliding section,maximum dangerous slide face by method of limit equilibrium will degenerate into vice dangerous slide face;and stepping slope face will dissipate stress concentration at the toe of slope. |
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| Keywords: | flathead shaped slope shear sliding section stress concentration bench shaped slope |
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