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基于河道淤泥气泡混合土(FMLSS)的微观构造特征,通过微观构造观察和分析,评价了FMLSS的强度特性和破坏机理。试验结果表明,保持FMLSS含水量一定,随着气泡掺入量的增加,FMLSS的内部平均等效孔径和气孔面积百分比含量呈线性增大趋势、而随着水泥掺入量的增加呈减小趋势;随着气泡掺入量的增加,FMLSS的气孔大小分布的均匀性降低,气孔平均等效孔径增大。试验结果还表明,FMLSS的强度发挥及破坏机理与FMLSS的气孔分布的均匀性以及等效孔径等微观构造参数存在明显的相关性。
Based on the microstructural features of FMLSS, the strength characteristics and failure mechanism of FMLSS were evaluated through microstructural observation and analysis. The experimental results show that keeping the FMLSS moisture content constant, the internal average equivalent pore size and the percentage of stomatal area fraction of FMLSS increase linearly with the increase of the amount of air bubbles, and decrease with the increase of the amount of cement incorporated With the increase of the amount of air bubbles, the uniformity of the pore size distribution of FMLSS decreases and the average pore size increases. The experimental results also show that there is a clear correlation between the strength of FMLSS and the failure mechanism and the uniformity of stomatal distribution and the equivalent microstructure parameters of FMLSS.