论文部分内容阅读
为分析河道淤泥气泡混合土的微观构造与其力学性质的相关性,通过压汞试验(MIP)探究河道淤泥气泡混合土(FMLSS)的微观构造特征,分析水泥含量、气泡含量及含水量对FMLSS微孔大小与微孔均匀程度的影响规律,并结合混合土强度指标对比分析微观试验结果与宏观特性,考察两者的相关性。分析结果表明,压汞法可用于研究FMLSS的微观构造特征,其中最可几孔径(出现概率最大的微孔孔径)与大小气孔体积比K可作为衡量FMLSS内部气孔大小分布的指标,不均匀系数Cu与曲率系数Cc可作为判别气孔分布均匀程度的指标。研究成果对于从微观构造角度揭示FMLSS的强度发挥及破坏机理有重要意义。
In order to analyze the correlation between microstructure and mechanical properties of silt-blown mixed soil in the river, the micro-structural characteristics of silt-bubble mixed soil (FMLSS) in the riverbed were investigated by mercury intrusion porosimetry (MIP). The influence of cement content, bubble content and water content on FMLSS micro The size of the pores and the uniformity of the micropores, the microscopic experimental results and macroscopic characteristics were compared with the strength indicators of the mixed soil to examine the correlation between the two. The results show that the mercury intrusion porosimetry can be used to study the microstructural features of FMLSS. Among them, the most probable pore size (the most probable pore size) and the ratio of pore size to pore size can be used as an index to measure the pore size distribution in FMLSS. The inhomogeneous coefficient Cu and curvature coefficient Cc can be used as indicators to determine the degree of stomatal distribution. The research results are of great significance for revealing the strength of FMLSS and destroying the mechanism from the perspective of microstructure.