摘要
通过试验研究了冻融循环对素水泥土及纤维水泥土的抗疲劳性能的影响。试验结果表明:掺入适量的玄武岩纤维可以改善水泥土的抗压、抗疲劳性能,而且对后者的影响更显著;纤维掺量越高,水泥土抵抗冻融循环破坏的能力也越强;水灰比对水泥土的抗压能力和抗疲劳能力的影响很大,因此在保证水泥土均匀拌合的前提下尽可能降低水灰比;应力水平越高,水泥土的疲劳寿命越短,且采用统计软件拟合出了应力水平S和疲劳寿命N之间的关系,工程上可根据S-N关系推测水泥土的应力水平或疲劳寿命。
The effects of freeze-thaw cycles on fatigue resistance of plain cement soil and fiber cement soil were studied experimentally.The results showed that adding appropriate amount of basalt fiber can improve the compressive and fatigue properties of cement soil,and the effect on the latter is more significant.The higher the content of fibers is,the stronger the resistance of cement soil to freeze-thaw cycles get.The water cement ratio has a great influence on the compressive and fatigue resistance of cement soil,so the water cement ratio can be reduced as much as possible under the premise of ensuring the uniform mixing of cement soil.The higher the stress level is,the shorter the fatigue life of cement soil become.The relationship between stress level S and fatigue life N is fitted by statistical software.The stress level or fatigue life of cement soil can be estimated according to S-N relationship in engineering.
作者
郭少龙
鹿群
林永良
刘有志
GUO Shaolong;LU Qun;LIN Yongliang;LIU Youzhi(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment,Tianjin Chengjian University,Tianjin 300384,China;Information Construction and Management Center,Tianjin Chengjian University,Tianjin 300348,China;Tianjin Yuanxu Engineering Consultation and Management Co.,Ltd.,Tianjin 300191,China)
出处
《水资源与水工程学报》
CSCD
2020年第1期200-206,共7页
Journal of Water Resources and Water Engineering
基金
天津市教委科研计划项目(2016CJ20)。
