| 砂砾料动残余变形特性的试验研究 |
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| 引用本文： | 曹培,王芳,严丽雪,顾春媛.砂砾料动残余变形特性的试验研究[J].岩土力学,2010,31(Z1):211-215. |
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| 作者姓名： | 曹培 王芳 严丽雪 顾春媛 |
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| 作者单位： | 南京水利科学研究院,南京,210024 |
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| 摘 要： | 采用GDS动三轴试验系统对某水电站堆石坝的砂砾料进行了两种级配的动残余变形试验。试验结果表明,在围压比较小时,大部分试验条件下材料的残余剪应变和残余体变与lg(1+N)较好地符合直线关系;当围压较大时,在低动应力水平下试验结果仍能较好地满足线性关系,但随着动应力水平的增加,试验结果的离散程度变大。另外,在相同初始状态条件下,土料抵抗动力荷载变形的能力随着土料中粗颗粒含量的增多而变大。
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| 关 键 词： | 砂砾料 颗粒级配 残余剪应变 残余体应变 |
| 收稿时间： | 2010-04-28 |
Experimental study of residual deformation behavior of sandy gravel |
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| CAO Pei,WANG Fang,YAN Li-xue,GU Chun-yuan.Experimental study of residual deformation behavior of sandy gravel[J].Rock and Soil Mechanics,2010,31(Z1):211-215. |
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| Authors: | CAO Pei WANG Fang YAN Li-xue GU Chun-yuan |
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| Institution: | Nanjing Hydraulic Research Institute, Nanjing 210024, China |
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| Abstract: | The residual deformation behaviors of sandy gravel with two kinds of grain size composition were experimentally studied by use of GDS dynamic triaxial system. It is shown that the most residual shear strain and residual volumetric strain under low cell pressure have good linear relationships with lg(1+N ), and they also have linear relationships under high cell pressure when the dynamic stress level is low. But with the increase of dynamic stress level, the dispersion of test results become larger. However, under the same initial state, the resistance of materials to dynamic load becomes stronger with the increase of coarse grain. |
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| Keywords: | sandy gravel grain size composition residual shear strain residual volumetric strain |
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