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Abstract With the improved direct shear creep apparatus，seven sets of creep tests were conducted on specimens containing organic clay，quartz and feldspar with different weight percentages and different spatial distribution under the same experimental conditions. The relationships of the sample average coefficient of viscosity with rheological material content and dimension were obtained. The influence of content and distribution of rheological material on soil creep properties were discussed. Some conclusions were drawn：the average coefficient of viscosity reduces with decreasing rheological material size as well as increasing spatial distribution uniformity，and tends to be a critical value. Rheological material content has a notably significant effect on the creep characteristic. With the increase of organic matter content，average viscosity coefficient decreases linearly. When the soil rheological material size is less than the critical size，soil creep characteristics are only related to the content and properties of rheological material，but not related to its shape and distribution form.
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Received: 19 May 2013
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2014, Vol. 33 
