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在疏浚淤泥中添加固化材料和EPS颗粒,制作成淤泥EPS颗粒混合轻质土,既可以资源化利用疏浚淤泥,又可以减少软土的地基处理费用。通过直接剪切试验,获取了淤泥EPS颗粒混合轻质土的抗剪强度参数,即粘聚力与内摩擦角。研究发现:粘聚力随水泥添加量和龄期的增加而增加;在水泥添加量较小时,粘聚力随EPS添加量增加而增加,在水泥添加量较大时,粘聚力随EPS颗粒添加量增加而减小;水泥添加量、EPS颗粒添加量和龄期对内摩擦角的影响不显著,淤泥EPS颗粒混合轻质土的内摩擦角总体分布在20~°35°之间。
In the dredged silt added curing material and EPS particles, made of sludge EPS particles mixed light soil, both the resource utilization of dredged sludge, but also can reduce the soft ground treatment costs. Through the direct shear test, the shear strength parameters, ie cohesion force and internal friction angle, of the mixed EPS lightweight silt are obtained. The results showed that the cohesion increases with the addition of cement and the age. When the amount of cement added is small, the cohesion increases with the addition of EPS. When the amount of cement added is larger, the cohesion increases with the increase of EPS particles The content of cement added, the addition amount of EPS particles and the age had no significant effect on the internal friction angle. The internal friction angle of mixed EPS particles of light silt was generally distributed in the range of 20 ~ 35 °.