| 无支护垂直基坑坍塌的临界高度 |
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| 引用本文： | 马崇武,牛银菊.无支护垂直基坑坍塌的临界高度[J].东莞理工学院学报,2012,19(3):99-102. |
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| 作者姓名： | 马崇武 牛银菊 |
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| 作者单位： | 1. 东莞理工学院建筑工程系,广东东莞,523808
2. 东莞理工学院计算机学院,广东东莞,523808 |
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| 基金项目： | 东莞市高等院校科研机构科技计划资助项目 |
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| 摘 要： | 随着城市现代化建设的不断发展，必将兴建大量高层建筑和合理开发地下空间，基坑工程的数量亦将不断增加。基于极限平衡理论，分析了无支护垂直土质基坑坍塌的力学机制，得到了其坍塌的临界高度、潜在滑动面倾角以及坍塌宽度的解析表达式。结果表明：当垂直基坑的开挖深度小于其坍塌的-临界深度时，基坑无需进行支护。这一结论可供有关部门参考。
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| 关 键 词： | 垂直基坑 极限平衡 临界高度 潜在破坏面 |
Critical Height of No Support Vertical Pit Collapse |
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| MA Chong-wu,NIU Yin-ju.Critical Height of No Support Vertical Pit Collapse[J].Journal of Dongguan Institute of Technology,2012,19(3):99-102. |
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| Authors: | MA Chong-wu NIU Yin-ju |
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| Institution: | 1.Department of Civil Engineering,Dongguan University of Technology,Dongguan 523808,China; 2.Computer College,Dongguan University of Technology,Dongguan 523808,China) |
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| Abstract: | With advancement of urban modernization,high-rise buildings will rapidly emerge and underground space will be suitably utilized.Therefore,the number of foundation pit engineering will be increased.Based on the limit equilibrium theory,the failure mechanism of no support vertical excavation pit is analyzed.The critical height,the failure-plane inclination and the width of the pit collapse are obtained.The results indicate that it’s no need to set any support when the foundation pit vertical depth is less than its critical depth.This conclusion is very helpful for the theoretical research of relevant engineering departments. |
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| Keywords: | vertical pit limit equilibrium critical height failure-plane |
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