| 土工格室加筋土的大尺寸直剪试验研究 |
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| 引用本文： | 刘炜,汪益敏,陈页开,周刚,余继东,黄放军.土工格室加筋土的大尺寸直剪试验研究[J].岩土力学,2008,29(11):3133-3138. |
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| 作者姓名： | 刘炜 汪益敏 陈页开 周刚 余继东 黄放军 |
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| 作者单位： | 1. 华南理工大学,交通学院,广州,510640
2. 广东梅河高速公路有限公司,广东,兴宁,514500 |
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| 摘 要： | 采用自行研制的500 mm×500 mm×400 mm(长×宽×高)大尺寸直剪仪,对土工格室加筋土以及土工格室加筋水泥稳定土的剪切性能进行了试验研究.通过大尺寸直剪试验模拟土工格室加筋土的剪切作用过程,得出加筋土剪切应力与剪切应变关系为非线性确定了土工格室加筋土的抗剪强度指标以及土工格室对土的抗剪强度增强机理,土工格室加筋土的黏聚力提高较大,内摩擦角变化相对较小.通过对素土和掺入量为5 %的水泥稳定土进行常规直剪试验、大尺寸直剪试验和三轴压缩试验对比分析,探讨不同试验方法对抗剪强度指标的影响,得出3种试验方法对应的抗剪强度指标及其相对大小;即素土的摩擦角大小依次为:三轴试验小于大尺寸直剪试验小于常规直剪试验,素土的黏聚力大小依次为:大尺寸直剪试验小于三轴试验小于常规直剪试验;水泥稳定土的摩擦角大小为:三轴试验小于大尺寸直剪试验,黏聚力结果比较大小依次为:三轴试验小于大尺寸直剪试验.
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| 关 键 词： | 土工格室 大尺寸 直剪试验 三轴压缩试验 水泥稳定土 |
| 收稿时间： | 2007-01-12 |
Research on large size direct shear test for geocell reinforced soil |
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| LIU Wei,WANG Yi-min,CHEN Ye-kai,ZHOU Gang,YU Ji-dong,HUANG Fang-jun.Research on large size direct shear test for geocell reinforced soil[J].Rock and Soil Mechanics,2008,29(11):3133-3138. |
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| Authors: | LIU Wei WANG Yi-min CHEN Ye-kai ZHOU Gang YU Ji-dong HUANG Fang-jun |
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| Institution: | 1. School of Traffic and Communications, South China University of Technology, Guangzhou 510640, China; 2. Guangdong Meihe Expressway Limited Corporation, Xingning 514500, China |
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| Abstract: | The experimental research on shear properties of geocell reinforced soil and geocell reinforced cement stabilized soil was carried out by using a large size direct shear equipment (500 mm?500 mm?400 mm, length?width?height) which was developed by South China University of Technology. Through the experiments, the shearing process of geocell reinforced soil was simulated. The shear strength indices and its strengthening theory by mechanics were determined. The experimental results show that the relationship curve of shear stress to shear strain of geocell reinforced soil is nonlinear. In addition, the cohesive force index was increased greatly. The friction angle was increased relatively less. Furthermore, on the purpose of understanding the influences of testing methods, three kinds of shear tests including regular direct shear test, large size direct shear test and triaxial compression test with in-situ soil and 5 % dosage of cement stabilized soil were conducted. The corresponding shear strength indices of different kinds of testing methods are in sequence from less to more as below: Friction angle of soil: triaxial compression test less than large size direct shear test less than regular direct shear test. Cohesive of soil: large size direct shear test is less than triaxial compression test less than regular direct shear test. Friction angle of cement stabilized soil: triaxial compression test is less than large size direct shear test. Cohesive force of cement stabilized soil: triaxial compression test less than large size direct shear test. |
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| Keywords: | geocell large size direct shear test triaxial compression test cement stabilized soil |
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