| 非均质软土基坑抗隆起稳定性的极限分析方法 |
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| 引用本文： | 秦会来,黄茂松,王卫东.非均质软土基坑抗隆起稳定性的极限分析方法[J].岩土力学,2008,29(10):2719-2724. |
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| 作者姓名： | 秦会来 黄茂松 王卫东 |
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| 作者单位： | 1.同济大学 岩土及地下工程教育部重点实验室，上海 200092；2.同济大学 地下建筑与工程系，上海 200092； 3.华东建筑设计研究院有限公司，上海 200002 |
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| 摘 要： | 考虑到实际工程中土体非均质以及软土地区基坑开挖过程中土体稳定性的特点，将极限分析上限方法应用于非均质软土基坑抗隆起稳定分析计算中，讨论了极限分析方法的适用性问题。选用Prandtl机构建立了非均质软土地区基坑抗隆起稳定分析的运动许可速度场，根据速度场推导了极限分析上限方法的计算公式。讨论了该方法中土体强度、基坑宽度、支护墙体入土深度、基岩埋置深度等因素对坑底抗隆起稳定的影响。通过几个工程的计算与对比，验证了该方法的适用性和优越性。
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| 关 键 词： | 极限分析上限法 软土 基坑支护 抗隆起稳定性 |
| 收稿时间： | 2006-09-15 |
Limit analysis method for basal stability of braced excavation against upheaval in heterogeneous soft clay |
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| QIN Hui-lai,HUANG Mao-song,WANG Wei-dong.Limit analysis method for basal stability of braced excavation against upheaval in heterogeneous soft clay[J].Rock and Soil Mechanics,2008,29(10):2719-2724. |
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| Authors: | QIN Hui-lai HUANG Mao-song WANG Wei-dong |
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| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 2.Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 3. East China Architectural Design and Research Institute Co., Ltd., Shanghai 200002, China |
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| Abstract: | The hetergeneity of soil is a common phenomenon in geotechnical engineering.In view of the characteristic of the soil stability during excavation in soft clay,an upper-bound limit analysis method is used to solve the problem of basal stability in heterogeneous soft soil.The applicability of the upper-bound method is discussed to ensure that it obeys the requirements of the limit analysis theorems.Prandtl mode of the bearing capacity of foundation is then adopted to construct a kinematically admissible veloc... |
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| Keywords: | upper-bound theorem of limit analysis soft clay braced excavation basal stability against upheaval |
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