摘要
为了研究冻融循环作用下土的性质对纤维水泥土力学性质的影响,以玄武岩纤维和水泥为加固材料,选取两种不同类型土体制作成试件进行无侧限抗压强度试验和冻融循环试验。通过研究发现,玄武岩纤维的加入未必能提高水泥土的强度,土体的性质是影响水泥土无侧限抗压强度的主要因素之一。冻融循环作用下土的性质对水泥土力学性质及破坏状态具有重要的影响。随着冻融循环次数的增加,水泥土的无侧限抗压强度逐渐减低,而纤维的添加可以有效降低水泥土强度损失,提高水泥土抵抗冻融循环的能力。研究结果可为冻融循环作用下玄武岩纤维水泥土力学机理的研究提供一定的理论基础,可为纤维水泥土在季节性冻土区的应用提供一定的借鉴和参考。
To study the influence of soil properties on mechanical properties of fiber reinforced cemented soil under freeze-thaw cycling,a series of unconfined compressive strength test and freeze-thaw cycling tests were conducted.Basalt fiber and cement were used as reinforcement materials.Two different types of soils were selected.From the research,it was found that the addition of basalt fiber may not improve the strength of cemented soil,and the properties of soil is one of the main factors that affect the unconfined compressive strength of cemented soil.With the increase of the number of freeze-thaw cycling,the unconfined compressive strength of cemented soil reduced gradually,and the addition of fiber reduced effectively the strength loss of cement soil and improved the ability of cement soil to resist freeze-thaw cycling.The results provide a theoretical basis for the study of the mechanical mechanism of basalt fiber reinforced cemented soil under freeze-thaw cycling,and present a reference for the application of fiber reinforced cemented soil in the regions of seasonal frozen soil.
作者
徐丽娜
牛雷
张婷
王亚波
王军
XU Li-na;NIU Lei;ZHANG Ting;WANG Ya-bo;WANG Jun(School of Civil Engineering,Jilin Jianzhu University,Changchun 130118,China;College of Construction Engineering,Jilin University,Changchun 130026,China)
出处
《科学技术与工程》
北大核心
2020年第21期8746-8749,共4页
Science Technology and Engineering
基金
国家留学基金委项目(201805975010)
吉林省教育厅“十三五”科学技术研究规划项目(JJKH20200283KJ)。
关键词
冻融循环
玄武岩纤维
水泥土
力学性质
freeze-thaw cycling
basalt fiber
cemented soil
mechanical properties
作者简介
第一作者:徐丽娜(1986—),女,汉族,吉林通化人,博士,副教授。研究方向:地基加固及桩基工程。E-mail:xulina@jlju.edu.cn;通信作者:牛雷(1980—),男,汉族,吉林长春人,博士,讲师。研究方向:地基加固及土体本构模型。E-mail:niulei2016@163.com。
