| 土工格栅加筋膨胀土的三轴试验研究 |
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| 引用本文： | 王协群,郭敏,胡波.土工格栅加筋膨胀土的三轴试验研究[J].岩土力学,2011,32(6):1649-1653. |
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| 作者姓名： | 王协群 郭敏 胡波 |
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| 作者单位： | 1. 武汉理工大学土木工程与建筑学院,武汉,430072
2. 长江科学院土工研究所,武汉,430010 |
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| 基金项目： | "十一五"科技支撑计划重大项目资助，武汉大学水资源与水电工程科学国家重点实验室开放基金项目资助 |
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| 摘 要： | 土工格栅加筋膨胀土路堤或路堑、渠坡已在公路、铁路与水利工程中获得成功应用,但目前对加筋膨胀土的强度与变形特性的研究还较少。对不同方案加筋(水平1层加筋、水平3层加筋、竖向加筋)与不加筋的膨胀土样在不同围压下的三轴排水剪切试验结果的分析表明,(1)土工格栅加筋膨胀土形成排水通道,加速土体的排水固结,有利于膨胀土坡的稳定;(2)土工格栅加筋膨胀土一般呈应变硬化特征;(3)土工格栅的植入使剪切带的发展受到抑制,导致破坏模式变化;(4)加筋使膨胀土的内摩擦角变化不大,而黏聚力则有明显提高,其提高程度从小到大依次为水平1层加筋、水平3层加筋和竖向加筋;(5)采用加筋效果系数R评价,除了水平1层加筋方式的效果有所降低外,其余加筋方式都表现出加筋比不加筋的效果要好,其中以竖向加筋的效果最好。
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| 关 键 词： | 膨胀土 水平加筋 竖向加筋 应力-应变特征 强度指标 加筋效果系数 |
| 收稿时间： | 2010-06-11 |
Triaxial testing study of expansive soil reinforced with geogrid |
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| WANG Xie-qun,GUO Min,HU Bo.Triaxial testing study of expansive soil reinforced with geogrid[J].Rock and Soil Mechanics,2011,32(6):1649-1653. |
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| Authors: | WANG Xie-qun GUO Min HU Bo |
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| Institution: | 1. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430072, China; 2. Geotechnical Division,Yangtze River Scientific Research Institute, Wuhan 430010, China |
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| Abstract: | The engineering technology that expansive soil embankment,cutting and canal slope were reinforced with geogrids has been successfully applied to highway,railway and hydraulic projects in the recent years.But the strength and deformation characteristics of reinforced expansive soil are not yet researched thoroughly.This paper presents the results of CD triaxial tests of a middle-class rxpansive soil under different confining pressures and different reinforcing patterns(horizontal reinforcing with one layer/t... |
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| Keywords: | expansive soil horizontal reinforcing vertical reinforcing stress-strain characteristics strength index coefficient of reinforcing effect |
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