| 分期预压中抗剪强度增长对地基稳定性的影响 |
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| 引用本文： | 徐书平,凡红,刘祖德. 分期预压中抗剪强度增长对地基稳定性的影响[J]. 武汉大学学报(工学版), 2007, 40(3): 53-56 |
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| 作者姓名： | 徐书平 凡红 刘祖德 |
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| 作者单位： | 1. 武汉工业学院土木工程系,湖北,武汉,430023
2. 武汉大学,土本建筑工程学院,湖北,武汉,430072 |
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| 摘 要： | 在分期堆载预压过程中,地基土在某一堆载固结压力下,其抗剪强度不仅有表观强度上增长,而且有结构强度的增长(次固结作用).因此,只有考虑到地基土的结构强度增长,对每级堆载地基稳定性进行计算才更为合理.结合具体的工程实例,对各种原位和室内试验进行统计分析,对地基土进行考虑结构强度增长的总应力法稳定性计算,并与考虑表观强度增长的总应力法和考虑超孔隙水压力的有效应力法地基稳定性计算进行对比.
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| 关 键 词： | 堆载 地基稳定性 强度增长 表观抗剪强度 结构抗剪强度 次固结 总应力法 有效应力法 |
| 文章编号： | 1671-8844（2007）03-0053-04 |
| 修稿时间： | 2006-08-16 |
Effect of shear strength increase on foundation stability in process of preloading in stallments |
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| XU Shuping,FAN Hong,LIU Zude. Effect of shear strength increase on foundation stability in process of preloading in stallments[J]. Engineering Journal of Wuhan University, 2007, 40(3): 53-56 |
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| Authors: | XU Shuping FAN Hong LIU Zude |
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| Affiliation: | 1. Department of Civil Engineering,Wuhan Polytechnic University,Wuhan 430023,China; 2. School of Civil and Architectural Engineering, Wuhan University, Wuhan 430072, China |
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| Abstract: | In the process of the preloading,the shear strength of soils of foundation increased not only apparent but also structural in each filling consolidation pressure.So it is necessary to consider the structural shear strength increase,then the results calculated of foundation stability is more reliable.By analyzing data of in-situ and laboratory in a certain project,the foundation stability is calculated with considering structural shear strength and meanwhile the foundation stability is also calculated with apparent strength increase total stress and the effective stress method considering the over-static water pressure;and then the result could be gained: conventional method is conservatism. |
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| Keywords: | preloading foundation stability strength increasing apparent shear strength structural shear strength secondary consolidation total stress method effective stress method |
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