摘要
为分析水泥改良土和石灰改良土的抗剪性能,在不同胶凝材料与干土的质量比条件下,对2种改良土的抗剪强度、黏聚力和内摩擦角进行试验研究,分析胶凝材料与干土的质量比、压实度、含水量、养护龄期等对改良土抗剪性能的影响规律.结果表明:同龄期下,2种改良土的抗剪强度、黏聚力和内摩擦角均随胶凝材料与干土质量比由4％增至10％而增大,拟合函数相关系数均大于0.980,拟合曲线均符合二次多项式关系;随压实度由90％增至99％而线性增大,压实度对石灰改良土黏聚力的影响更显著;随含水量由13％增至22％而减小,抗剪强度、内摩擦角与含水量呈二次多项式关系;随养护龄期由7 d增至120 d时先迅速增大,养护60 d后抗剪性能趋稳.
Abstract
To analyze the shear properties of cement-stabilized soil and lime-stabilized soil,experimental studies are conducted on the shear strength,cohesion,and friction angle of the two types of stabilized soil under different mass ratios of cement and lime to dry soil.The effects of the mass ratio of cementitious materials to dry soil,dry density,moisture content,and curing age on the shear performance of the stabilized soil are analyzed.The results show that under the same curing age,the shear strength,cohesion,and friction angle of both types of stabilized soil increase as the mass ratio of cementitious materials to dry soil rises from 4％to 10％.The correlation coefficients of the fitting functions are all greater than 0.980,and the fitting curves all follow a quadratic polynomial relationship.As the compaction degree increases from 90％to 99％,these parameters linearly increase,with compaction degree having a more significant effect on the cohesion of lime-stabilized soil.As the moisture content increases from 13％to 22％,the shear strength and friction angle exhibit a quadratic polynomial relationship,while cohesion is linearly related to moisture content.When the curing age is increased from 7 days to 120 days,the shear performance rapidly increases initially,stabilizing after 60 days of curing.
维普
万方数据