| 关于真空预压沉降计算的研究 |
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| 引用本文： | 施建勇,雷国辉,艾英钵,卫丹,宋雄伟.关于真空预压沉降计算的研究[J].岩土力学,2006,27(3):365-368. |
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| 作者姓名： | 施建勇 雷国辉 艾英钵 卫丹 宋雄伟 |
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| 作者单位： | 河海大学,岩土工程研究所,南京,210098 |
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| 摘 要： | 真空预压的沉降计算参数（压缩系数）是通过压缩试验得到的，但地基土在真空预压荷载作用下的受力状态与压缩试验中土样的受力状态是不同的，用压缩试验得到的压缩系数进行真空预压处理的沉降计算是不合理的。为了探讨这个问题，进行线弹性条件下的理论分析、模拟真空预压应力路径的全自动应力控制三轴（GDS）压缩试验、真空预压的现场监测等工作，初步讨论了弹性条件竖向荷载相同时等向与单向压缩量的比、模拟真空预压应力路径的压缩系数与单向压缩时的压缩系数的试验关系，真空预压现场监测和单向压缩量计算结果对比表明了上述分析的合理性。
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| 关 键 词： | 真空预压 沉降计算 压缩系数 应力状态 |
| 文章编号： | 1000-7598-（2006）03-0365-04 |
| 收稿时间： | 2004-08-16 |
| 修稿时间： | 2004-12-07 |
Research of settlement calculation for vacuum preloading |
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| SHI Jian-yong,LEI Guo-hui,AI Ying-bo,WEI Dan,SONG Xiong-wei.Research of settlement calculation for vacuum preloading[J].Rock and Soil Mechanics,2006,27(3):365-368. |
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| Authors: | SHI Jian-yong LEI Guo-hui AI Ying-bo WEI Dan SONG Xiong-wei |
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| Institution: | Institute of Geotchnical Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | The compression coefficient in settlement calculation for vacuum preloading is based on the oedometer test, but the stress state in ground for vacuum preloading is different from oedometer test, the results of settlement calculation is unreasonable used parameter from oedometer test. The theoretic analyses in elastic condition, compression test by trixail apparatus with automatic controlled stress that can simulate the stress path in vacuum preloading, and field monitoring in project of vacuum preloading are presented. The ratio of isotropic to one dimensional consolidation in elastic condition under same load, compression coefficient from trixial test and oedometer test are discussed. Settlement results of field monitor and calculation show above consideration is reasonable. |
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| Keywords: | vacuum preloading settlement calculation compression coefficient stress state |
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