| 香港全风化花岗岩饱和直剪试验中的剪胀问题 |
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| 引用本文： | 赵建军,王思敬,尚彦军,岳中琦.香港全风化花岗岩饱和直剪试验中的剪胀问题[J].力学学报,2005,13(1):44-48. |
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| 作者姓名： | 赵建军 王思敬 尚彦军 岳中琦 |
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| 作者单位： | 1. 河海大学土木工程学院,南京210098;
2. 天津城市建设学院土木系,天津300384;
3. 中国科学院地质与地球物理研究所,北京100029;
4. 香港大学,香港 |
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| 基金项目： | 香港大学边坡信息资讯中心资助项目(香港全风化花岗岩的微结构综合研究NO1) |
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| 摘 要： | 通过对全风化花岗岩的慢剪试验,指出了在直剪试验中出现的两种垂直位移变化形式,其对土体的剪胀剪缩性质的 反映与三轴试验是一致的。剪胀的发生与土体的密实程度密切相关;随垂直压力的增大,剪胀发生所需剪应力也增大;剪应 力达到峰值所需要剪位移总是比剪胀发生时所需的剪位移大。
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| 关 键 词： | 直剪试验 剪胀 全风化花岗岩 |
| 收稿时间： | 2004-04-28 |
| 修稿时间： | 2004-06-07 |
DILATATION IN DIRECT SHEAR TESTS OF HONG KONG COMPLETELY DECOMPOSED GRANITE (CDG) |
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| ZHAO Jianjun,WANG Sijing,SHANG Yanjun,YUE Zhongqi.DILATATION IN DIRECT SHEAR TESTS OF HONG KONG COMPLETELY DECOMPOSED GRANITE (CDG)[J].chinese journal of theoretical and applied mechanics,2005,13(1):44-48. |
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| Authors: | ZHAO Jianjun WANG Sijing SHANG Yanjun YUE Zhongqi |
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| Institution: | 1. Institute of Civil Engineering, Hohai University, Nanjing 210098;
2. Department of Civil Engineering, TIUC, Tianjin 300384;
3. Institute of Geology and Geophysics, CAS, Beijing 100029;
4. Hong Kong University, Hong Kong |
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| Abstract: | This paper discusses dilatation in direct shear tests. There are 2 types of vertical displacements in direct shear tests. They reflect same dilatation and shrinking behavior of soil as those in triaxial tests. The dilatation is related to the density of soil. The shear stress required for the dilatation increases with the normal stress. The shear displacement for the dilatation is always less than that at the peak shear stress. |
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| Keywords: | Direct shear test Dilatation Completely decomposed granite (CDG) |
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