石灰改良膨胀土抗剪强度参数试验研究

摘要

对石灰改良膨胀土强度形成机理进行了分析,研究了养护时间、初始含水率、掺灰率对石灰改良膨胀土的凝聚力及内摩擦角的影响,提出综合考虑含水率与掺灰率的凝聚力计算式,通过研究认为养护时间对凝聚力和内摩擦角的影响0～7d比7～28 d大,但对内摩擦角的影响比凝聚力小,这些结论的得出对进一步研究石灰改良膨胀土的抗剪强度具有一定的参考意义.%The strength formation mechanism of lime-treated expansive soil is analyzed, and then the effects of curing time, initial moisture content, lime rate on the cohesion and the internal friction angle of the treated expansive soil are investigated. The cohesion calculation formula in consideration of water content and lime rate is proposed. It is believed that the influence of curing time of 0-7 days on the cohesion and internal friction angle is larger than that of 7-28 days, and the curing time has less influence on internal friction angle than on cohesion. These conclusions can be referential for researches on the shear strength of lime-treated expansive soil