| 真空排水预压工程中真空度的现场测试与分析 |
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| 引用本文： | 岑仰润,俞建霖,龚晓南.真空排水预压工程中真空度的现场测试与分析[J].岩土力学,2003,24(4):603-605. |
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| 作者姓名： | 岑仰润 俞建霖 龚晓南 |
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| 作者单位： | 浙江大学 岩土工程研究所，浙江 杭州 310027 |
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| 摘 要： | 在分析真空和负压基本物理概念的基础上，总结了真空排水预压工程中真空度现场测试技术和应用现状。通过室内试验及工程实践证明，真空排水预压情况下，地下水位以上的软粘土仍是饱和的，因此，对地下水位以上真空度测点，真空表读数实际反映的是该处的孔隙水压力；而对地下水位以下的真空度测点，真空表读数无意义。
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| 关 键 词： | 真空 真空度 负压 真空排水预压 地下水位 |
| 文章编号： | 1000-7598-(2003)04-0603-03 |
| 收稿时间： | 2002-04-22 |
| 修稿时间： | 2002年4月22日 |
Field test and analysis of vacuum pressure in vacuum drainage preloading |
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| CEN Yang-run,YU Jian-lin,GONG Xiao-nan.Field test and analysis of vacuum pressure in vacuum drainage preloading[J].Rock and Soil Mechanics,2003,24(4):603-605. |
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| Authors: | CEN Yang-run YU Jian-lin GONG Xiao-nan |
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| Institution: | Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | Based on the analysis of basic physical concept of vacuum, the up-to-date in-situ measurement techniques and applications were summarized for the vacuum drainage preloading in construction engineering. The laboratory tests and engineering practices demonstrated that the soft clay above groundwater level was still under saturation even with vacuum drainage preloading. Therefore, when vacuum data were measured above groundwater level, the reading of vacuum gauge reflected the water pressure in pore void space, whereas if vacuum pressure measurement was located under groundwater level, the reading of vacuum gauge was meaningless. |
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| Keywords: | vacuum vacuum pressure negative pressure vacuum drainage preloading groundwater table |
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