| 软土地基水下真空预压固结离心模型试验 |
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| 引用本文： | 胡利文,吴宏伟.软土地基水下真空预压固结离心模型试验[J].水运工程,2011(11):201-206. |
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| 作者姓名： | 胡利文 吴宏伟 |
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| 作者单位： | 1. 中交第四航务工程局有限公司,广东广州,510231
2. 香港科技大学,香港 |
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| 基金项目： | 香港研究资助局基金（CA03/04.EG02） |
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| 摘 要： | 采用新发明的真空吸水系统应用于离心机中，可以使土体产生向上渗流并模拟软土地基真空预压。为获得理想的水下真空预压固结对比效果，竖井采用2种不同井间距的砂井，密封膜采用完全覆盖的形式。用发明的装置产生水下真空得以模拟软土水下固结行为。介绍了模型制作、试验程序及真空发生系统，并分析了孔隙水压力、变形、不排水剪切强度的改变和不同井间距对固结速率的影响。
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| 关 键 词： | 软土地基 水下真空预压 离心模型 固结 |
Centrifuge modeling of consolidation behavior of soft ground improved by underwater vacuum preloading |
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| HU Li-wen,NG C.W.W..Centrifuge modeling of consolidation behavior of soft ground improved by underwater vacuum preloading[J].Port & Waterway Engineering,2011(11):201-206. |
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| Authors: | HU Li-wen NG CWW |
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| Institution: | 1. CCCC Fourth Harbor Engineering Co. Ltd., Guangzhou 510231, China;2. The Hong Kong University of Science and Technology, Hong Kong, China |
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| Abstract: | A vacuum generator system has been newly developed to implement upward flow and simulate underwater vacuum preloading of soft clay in centrifuge model tests. Two vertical drain groups were installed within one model with ideal full coverage of membrane on the soil surface. Underwater vacuum was provided to simulate the consolidation behavior of soft soil. Model preparation procedures and vacuum generation techniques are described.Response of pore water pressure, deformation and change of undrained shear strength are presented and the influence of drain spacing on the rate of consolidation is discussed. |
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| Keywords: | soft ground underwater vacuum preloading centrifuge modeling consolidation |
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