| 土体K_0固结-卸荷剪切试验研究 |
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| 作者单位： | 广州大学土木工程学院，广州大学市政技术学院 广州 510006，广州 510000 |
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| 摘 要： | 根据基坑开挖的特点,改进常规三轴试验仪器的控制程序。并以此为基础,利用三轴仪对基坑开挖过程中土体的K_0固结-侧向卸荷过程进行模拟,同时与常规三轴压缩试验结果进行对比分析,研究了侧向卸荷过程对土体抗剪强度指标产生的影响。试验结果表明,经过侧向卸荷过程的土样抗剪强度指标与常规三轴压缩试验结果明显不同,特别对于深层土,抗剪强度指标下降急剧,说明卸荷过程对土体抗剪强度指标有较大影响。
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| 关 键 词： | 侧向卸荷 抗剪强度 三轴试验 |
Study on Shear Tests with K_0 Consolidation-Unloading for Soil |
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| Authors: | Tong Huawei |
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| Affiliation: | Tong Huawei |
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| Abstract: | Following the characteristics of foundation pit excavation,the control procedure for the commonly-used triaxial apparatus is improved and the process for the Ko consolidation-lateral unloading just like the foundation pit excavation is simulated.The influence of the unloading to the shear strength indices of soil in lateral unloading tests is studied by contrasting the unloading results with the triaxial compressi(?)testing results. The testing results indicate that the shear strength indices of soil are obviously different between the triaxial unloading tests and the triaxial compression tests.Especially for the deep soil,the shear strength indices are sharply decreased which show that the lateral unloading is of the great effect on the shear strength indices of soil. |
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| Keywords: | lateral unloading shear strength triaxial test |
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