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采用改进的直剪蠕变仪,在相同试验条件下完成7组含有机土、石英和长石不同重量百分比及不同分布形式试样蠕变特性的测试。获得试样平均黏滞系数与流变物质含量及尺寸的关系;探讨流变物质含量及其分布形式对软土蠕变特性的影响。试验结果表明,土体平均黏滞系数随着流变物质尺寸减小及空间分布均匀性增加而减小,且存在一临界值;流变物质含量比例对蠕变特性影响显著,平均黏滞系数随着有机质含量的增加近似呈线性减少;当土体中流变物质尺寸小于临界尺寸时,即流变物质分布达到一定均匀性时,土体蠕变特性仅与流变物质含量、性质有关,而与其形状、分布形式无关。
The improved direct shear creep tester was used to test the creep characteristics of seven groups of samples containing different contents of organic earth, quartz and feldspar with different weight percentages and different distributions under the same experimental conditions. The relationship between the average viscosity coefficient of sample and the content and size of rheological material was obtained. The influence of rheological material content and its distribution on creep property of soft soil was also discussed. The experimental results show that the average viscosity coefficient of soil decreases with the increase of rheological material size and spatial uniformity, and there is a critical value. The ratio of rheological material has a significant effect on the creep characteristics. The average viscosity coefficient When the size of rheological material is smaller than the critical size, that is, when the distribution of rheological material reaches a certain degree of uniformity, the creep property of soil is only related to the content and property of rheological material, Its shape, distribution has nothing to do.