摘要
穿越黄河冲淤积地层的高速公路在修建时场地中存在塑性低、强度小的低液限粉土,影响高速公路的建设质量。如何因地制宜,对所在场地土层进行加固改性,是实现高速公路快速建造的关键。文中对该场地中低液限粉土及其改性加固技术进行研究,获得低液限粉土的改性方法,采用数值方法计算改性粉土用于路面基层的弯沉和拉应力,分析改性低液限粉土用于路面基层时的改良效果。结果表明,文中所提出的改性材料加固低液限粉土效果较好,最大弯沉位置与底基层底面弯沉有较大幅度降低。
During the construction of the highway crossing the alluvial and silted strata of the Yellow River,there are low liquid limit silt with low plasticity and low strength in the site,which affects the construction quality of the highway.How to reinforce and modify the soil layer on the site according to local conditions is the key to achieving rapid construction of highways.The low liquid limit silt in the site and its modified reinforcement technology are studied,and the modified method of low liquid limit silt is given in this work.Moreover,the deflection and tensile stress of modified silt used for pavement base are analyzed by using numerical calculation method,and the improvement effect of modified low liquid limit silt used for pavement base is determined.The results show that the modified materials proposed have a good effect on strengthening low liquid limit silt,with a significant reduction in the maximum deflection position and the deflection of the subbase bottom.
作者
黄伟
刘春阳
巩泽辉
巩宪金
崔伟
HUANG Wei;LIU Chunyang;GONG Zehui;GONG Xianjin;CUI Wei(Shandong Luqiao Group Co.,Ltd.,Jinan 250014,China;School of Qilu Transportation,Shandong University,Jinan 250002,China)
出处
《交通科技》
2023年第2期28-32,共5页
Transportation Science & Technology
关键词
低液限粉土
改性加固技术
底基层
弯沉
拉应力
silt with low liquid limit
modified reinforcement technology
subbase
deflection
tensile stress
