| 真空作用面位置对加固效果影响的试验研究 |
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| 引用本文： | 胡珩,王保田.真空作用面位置对加固效果影响的试验研究[J].岩土力学,2009,30(5):1287-1290. |
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| 作者姓名： | 胡珩 王保田 |
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| 作者单位： | 1. 河海大学,岩土工程研究所,南京,210098;中交四航工程研究院有限公司,广州,510230
2. 河海大学,岩土工程研究所,南京,210098 |
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| 摘 要： | 工程中应用广泛的真空预压法和真空-堆载联合预压法主要是指真空作用面位于地表面，通过从上部抽真空实现预压的目的，但对于吹填造陆工程，则不十分合理。通过室内试验模拟上位抽真空和下位抽真空，分别从土体的物理力学性质、沉降量、排水量等几个方面对2种预压方法的加固效果进行了比较分析，阐述了真空作用面位置对加固效果的影响。试验结果表明：下位抽真空的加固效果优于上位抽真空。
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| 关 键 词： | 真空预压法 真空作用面 抗剪强度 沉降量 排水量 |
| 收稿时间： | 2008-01-07 |
Experimental study of effect of vacuum location on improvement of subsoil |
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| HU Heng,WANG Bao-tian.Experimental study of effect of vacuum location on improvement of subsoil[J].Rock and Soil Mechanics,2009,30(5):1287-1290. |
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| Authors: | HU Heng WANG Bao-tian |
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| Institution: | 1. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 2. Engineering Technology Research Co., Ltd. of CCCC Fourth Harbor Engineering Co., Ltd., Guangzhou 510230, China |
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| Abstract: | Vacuum preloading and vacuum combined with surcharge preloading used widely in construction put their vacuum location in the ground surface, and take out air from the top to improve the soft foundation; but that is not suitable to land reclamation. Vacuum preloading at the top and vacuum preloading at the bottom are simulated by laboratory test; then the properties of soil before and after test, axial settlement, drainage flow are analyzed to study the effect of vacuum location on the improvement of subsoil. The results show that the vacuum preloading at the bottom is better than vacuum preloading at the top. |
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| Keywords: | vacuum preloading vacuum location shear strength settlement drainage flow |
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