| 渗流作用对基坑坑底回弹变形的影响 |
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| 引用本文： | 李玉岐,周健,谢康和.渗流作用对基坑坑底回弹变形的影响[J].岩土力学,2005,26(11):1749-1752. |
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| 作者姓名： | 李玉岐 周健 谢康和 |
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| 作者单位： | 1. 同济大学 地下建筑与工程系，上海 200092；2. 浙江大学 岩土工程研究所，杭州 310027 |
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| 摘 要： | 在地下水位较高的地区开挖基坑时渗流作用是普遍存在的。假定坑内外地下水渗流为一维稳定的条件，推导了坑内外被动区和主动区的水头计算公式，并结合算例分析了渗流对坑底被动区的有效应力和坑底回弹变形的影响。研究表明，渗流作用使得坑底的有效应力减小，进而引起坑底土层回弹量增大。
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| 关 键 词： | 渗流 回弹 水头 基坑开挖 有效应力 |
| 文章编号： | 1000-7598-（2005）11-1749-04 |
| 收稿时间： | 2004-04-29 |
| 修稿时间： | 2004-06-14 |
Influence of seepage on heave of foundation pit base during excavation |
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| LI Yu-qi,ZHOU Jian,XIE Kang-he.Influence of seepage on heave of foundation pit base during excavation[J].Rock and Soil Mechanics,2005,26(11):1749-1752. |
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| Authors: | LI Yu-qi ZHOU Jian XIE Kang-he |
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| Institution: | 1. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Seepage is ubiquitous during excavation in high groundwater table.Analytical formulas for calculating the water head in active and passive zones of foundation pit are derived under the assumption that the seepage is one-dimensional and steady.The influence of seepage on the effective stress and the heave of foundation pit base is analyzed through a numerical example.It is indicated that seepage causes the decrease of effective stress and thus the increase of heave of soil mass beneath foundation pit base. |
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| Keywords: | seepage heave water head excavation effective stress |
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