| 超重力场中界面土压力的测量 |
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| 引用本文： | 徐光明,陈爱忠,曾友金,顾行文,蔡正银.超重力场中界面土压力的测量[J].岩土力学,2007,28(12):2671-2674. |
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| 作者姓名： | 徐光明 陈爱忠 曾友金 顾行文 蔡正银 |
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| 作者单位： | 1. 南京水利科学研究院岩土工程研究所，南京 210024; 2. 溧阳市溧城力源电子设备厂，江苏 溧阳，213300 |
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| 摘 要： | 测量诸如孔隙水压力、位移和载荷等物理量能够达到相当高的精度，但土压力的测量则困难得多。在吸取了国内外同行经验后，为离心模型试验设计研制了一种微型土压力盒，主要用于土与结构物界面土压力的测量。水压力、干砂压力和砂土压力三种标定结果表明，这种微型土压力盒的线性度良好；在研究地下连续墙的侧向土压力分布的离心模型试验中，根据这种微型土压力盒的测试结果，获得了合理的侧压力系数。
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| 关 键 词： | 超重力场 土压力 微型土压力盒 界面土压力 |
| 文章编号： | 1000-7598-（2007）12-2671-04 |
| 收稿时间： | 2005-12-01 |
| 修稿时间： | 2006-04-18 |
Measurement of boundary total stress in a multi-gravity environment |
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| XU Guang-ming,CHEN Ai-ming,ZENG You-Jin,GU Xing-Wen,CAI Zheng-Yin.Measurement of boundary total stress in a multi-gravity environment[J].Rock and Soil Mechanics,2007,28(12):2671-2674. |
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| Authors: | XU Guang-ming CHEN Ai-ming ZENG You-Jin GU Xing-Wen CAI Zheng-Yin |
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| Institution: | 1. Department of Geotechnical Engineering ,Nanjing Hydraulic Research Institute, Nanjing 210024, China; 2. Licheng Electronic Device Producer, Liyang 213300, China |
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| Abstract: | Although the measurement of physical phenomena such as pore water pressure,displacement and load is routinely carried out with a high degree of accuracy both in prototype and in small scale centrifuge models,the accurate derivation of soil stresses poses a number of problems.The design criterion is first reviewed and discussed with focusing on cell and soil effects.Key guidance is proposed by introducing flexibility factor in the design of earth pressure cells.A new kind of miniature earth pressure cells is developed to measure boundary total stress in a multi-gravity environment.The performance of their calibration is given under pressure of water,dry fine sand pressure and saturated fine sand produced in flight of centrifugal acceleration.An application is also reported of the newly developed miniature earth pressure cells in measuring lateral soil stress against a single wall in ground of dry fine sand.A reasonable K0 value is derived from the measured earth pressure,demonstrating their accuracy in the measurement of boundary total stress in a multi-gravity environment. |
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| Keywords: | multi-gravity environment earth pressure miniature earth pressure cell boundary total stress |
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