公路路基泥质软岩填料的力学特性研究  

Study on Mechanical Characteristics of Soft Rock Filling in Highway Subgrade

作　　者：李宏俊[1] 潘少红[1] 杨建桥 Li Hongjun;Pan Shaohong;Yang Jianqiao(Yunnan Land and Resources Vocational College,Kunming 652501,China)

机构地区：[1]云南国土资源职业学院,昆明652501

出　　处：《粘接》2021年第7期58-62,共5页Adhesion

基　　金：云南省教育厅科学研究基金项目资助(2020J0968)。

摘　　要：结合公路路基对泥质软岩填料的实际应用需求,考察了泥质软岩填料的击实、承载比、直剪和固化性能。结果表明,当P5分别为50%、70%和90%时,泥质软岩填料的最佳含水率分别为9.86%、9.20%和8.74%,对应的最大干密度分别为1.984g/cm^(3)、2.144g/cm^(3)和2.177g/cm^(3),击实后P_(5)为50%、70%和90%的试件的不均匀系数分别增加至26.26、22.11和21.32,级配明显改善;压实度分别为93%、94%和96%的试件的承载比平均值分别为12.1%、18.2%和25.3%;在相同的垂直压力下,压实度更大的泥质软岩填料试件的剪切强度会更大。当轴向应力分别为200kPa、400kPa和800kPa时,浸水后泥质软岩填料试件的湿化变形率分别为1.96%、2.67%和3.00%;浸水后泥质软岩填料试件的湿化变形率会随着轴向压力增加而增大,但是压实度为93%时浸水后泥质软岩填料试件的湿化变形率整体不高。The coMPaction,load bearing ratio,direct shear and curing properties of the argillite soft rock fillers were investigated according to the practical application requirements of the highway subgrade for argillaceous soft rock filler.The results show that when P5 is 50%,70%and 90%,the optimal moisture content of the argillaceous soft rock filler is 9.86%,9.20%and 8.74%,and the corresponding maximum dry density is 1.984g/cm^(3),2.144g/cm^(3) and 2.177g/cm^(3),respectively.After coMPaction,the non-uniformity coefficient of the specimens with P_(5) being 50%,70%and 90%increases to 26.26,22.11 and 21.32,and the grading is significantly improved.The average load bearing ratios of the specimens with the coMPaction density of 93%,94%and 96%were 12.1%,18.2%and 25.3%,respectively.Under the same vertical pressure,the shear strength of argillaceous soft rock packing specimens with higher coMPacted density will be greater.When the axial stress was 200kPa,400kPa and 800kPa respectively,the wet deformation rates of muddy soft rock packing specimens after immersion were 1.96%,2.67%and 3.00%respectively.The wet deformation rate of muddy soft rock packing specimen increases with the increase of axial pressure,but the wet deformation rate of the argillaceous soft rock filler specimen after immersion in water is not high overall when the coMPaction density is 93%.

关 键 词：公路路基 泥质软岩填料 承载比 直剪 固化 

分 类 号：U416.1[交通运输工程—道路与铁道工程]