台州淤泥质土固化特性研究

Study on Curing Properties of Taizhou Sludge Soil

为了研究以二灰为主固化剂、TZ-01为添加剂的固化方案在台州淤泥质土中的加固效果以及不同因素对于固化土强度的影响,对台州淤泥质土的固化特性进行试验研究.通过试验对淤泥质土的含水量、有机质含量、主固化剂掺量、添加剂掺入比以及龄期这5个因素进行分析.试验结果表明淤泥质土的含水量会阻碍固化土强度的增长,主固化和龄期的增长能够有效地增强固化土的强度,有机质含量和添加剂掺入比存在一个最佳掺量.通过对固化土无侧限压缩试验得到的应力应变曲线进行分析,提出了固化土在单轴压缩下的4个阶段.通过数据处理与分析,引入水灰比,并综合考虑有机质含量、添加剂掺入比和龄期的影响,建立了固化土强度预测模型.

In order to figure out the effect of curing agent in sludge soil with the fly ash and lime as the main curing agent and TZ-01 as the additive,a series of experiments were conducted to study the strength characteristics of solidified soil and the influencing factors on the strength of solidified soil.Through experiments,the initial water content,organic matter content,main curing agent content,additive incorporation ratio,and age of solidified soil were analyzed.The results showed that the initial water content of the sludge soil hindered the growth of the solidified soil.The main curing agent and age growth can effectively enhance the strength of the solidified soil,and there was an optimum blending ratio of organic matter content and additive incorporation ratio.Based on the analysis of the stress-strain curve obtained from the unconstrained compression test of solidified soil,four stages of solidified soil under uniaxial compression were proposed.By processing and analyzing data,the water-cement ratio β was introduced,the effects of organic matter content,additive incorporation ratio and age were comprehensively considered,and the solidified soil strength prediction model was established.