| 堆载预压与真空预压加固软土地基机理的比较分析 |
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| 引用本文： | 王绪民,赵若华,苗永刚.堆载预压与真空预压加固软土地基机理的比较分析[J].工程勘察,2009(9):9-12. |
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| 作者姓名： | 王绪民 赵若华 苗永刚 |
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| 作者单位： | 湖北工业大学土建学院;中建三局二公司; |
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| 摘 要： | 根据有效应力原理,从土体应力路径的角度研究了堆载预压与真空预压加固软土地基的机理。通过研究可以发现：堆载预压时土体应力状态介于K0与Kf线之间而真空预压时土体的应力状态介于p轴与K0线之间。应力路径的差别表明：为防止堆载预压引起土体破坏,必须控制加载大小和速率,而真空预压加固时不会引起土体破坏。堆载预压时土体变形表现为垂直向收缩而水平向伸长的剪切变形,真空预压时土体变形主要是收缩变形并且垂直向收缩量大于水平向收缩量。在有效大主应力相同的条件下,真空预压比堆载预压的加固效果好。
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| 关 键 词： | 真空预压 堆载预压 应力路径 |
Compare and analysis of mechanism of soft clay consolidation by the vacuum preloading and heaped preloading |
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| Wang Xumin,Zhao Ruohua,Miao Yonggang.Compare and analysis of mechanism of soft clay consolidation by the vacuum preloading and heaped preloading[J].Geotechnical Investigation & Surveying,2009(9):9-12. |
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| Authors: | Wang Xumin Zhao Ruohua Miao Yonggang |
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| Affiliation: | Wang Xumin~1,Zhao Ruohua~2,Miao Yonggang~2(1.School of Civil Engineering,Hubei University of Technology,Wuhan 430068,China,2.No.2 Co.LTD of China Construction Third Bureau,Wuhan 430070,China) |
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| Abstract: | According to the principle of effective stress,the mechanism of soft clay consolidation by heaped preloading and vacuum preloading based on stress path analysis is studied.It is found that the stress state changes from K_0 line to K_f line under heaped preloading and changes from p axes to K_0 line under vacuum preloading.Base on the stress paths' analysis,the following results can be drawn: the strength and velocity of loading must be controlled to prevent the damage of the soft clay in heaped preloading.B... |
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| Keywords: | vacuum preloading heaped preloading stress path |
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