河道疏浚废弃淤泥改良土的强度变化规律探讨

通过系列室内试验,研究了添加生石灰改良高含水量疏浚淤泥的处理土的无侧限抗压强度的主要影响因素;探讨了高含水量疏浚淤泥生石灰处理土的无侧限抗压强度与原泥初始含水量、生石灰掺入比、处理土含水量的关系,得出了生石灰处理土的无侧限抗压强度随着含水量降低率的增加而线性增加的变化规律;建立了生石灰处理土无侧限抗压强度与原泥初始含水量及处理土含水量的定量表达式,给出了生石灰改良高含水量疏浚淤泥的处理土不排水强度的预测方法,可为高含水量疏浚淤泥的有效利用和相关工程设计、施工提供理论基础和指导。

Undrained Strength Behavior of Treated Dredged Clays with Quick Lime

A series of laboratory tests were performed on the dredged clays treated with quick lime to investigate the main factors of effect on their unconfined compressive strength. The relationships between unconfined compressive strength of treated dredged clays with quick lime and original water content of dredged clays,quick lime content,and water content of treated soils were discussed. Analysis of test data gave a linear relationship between the unconfined compressive strength of treated dredged clays with quick lime and the decreasing percent of water content proposed by authors. A quantitative formula was also proposed in this study for predicting the unconfined compressive strength of treated dredged clays with original water content of dredged clays and water content of treated soils. The testing results are valuable for utilization of waste dredged clays as filling materials.