冻融条件下纤维加筋水泥土抗压强度影响研究  

Study on the Influence of Fiber-reinforced Cement-soil Compressive Strength under Freeze-Thaw Conditions

作　　者：沈婷[1] SHEN Ting(Maanshan Teacher’s College,Maanshan 243000,China)

机构地区：[1]马鞍山师范高等专科学校,安徽马鞍山243000

出　　处：《宜春学院学报》2021年第12期55-58,102,共5页Journal of Yichun University

基　　金：安徽省级自然科学重点科研项目(编号:KJ2020A0882);安徽省教育厅高校优秀拔尖人才培育资助项目(编号:gxyqZD2021062)。

摘　　要：重金属污染土壤,给工业和农业都造成了不可估量的损失。以水泥固化重金属污染土为研究对象,采用稻秸秆加筋处理、快冻法进行冻融循环和无侧限抗压强度实验,探究水泥固化重金属污染土在加筋率、冻融循环次数、重金属含量等参数变化的情况下的工程特性。结果表明:当重金属污染土试样的水泥掺量逐渐增大时,试样的无侧限抗压强度呈现增大趋势,而破坏应变呈减小趋势:加筋的重金属污染土试样相较于未加筋的试样,无侧限抗压强度提高了1~3倍,破坏应变降低了约0.5倍。Heavy metals pollute the soil,causing immeasurable losses to industry and agriculture.Taking cement-solidified heavy metal contaminated soil as the research object,using rice straw reinforcement treatment and quick freezing method to carry out freeze-thaw cycles and unconfined compressive strength experiments to explore the reinforcement rate,freeze-thaw cycle times and heavy metals of cement-solidified heavy metal contaminated soil Engineering characteristics when the content and other parameters change.The results showed that the unconfined compressive strength of the samples showed an increasing trendwhen the cement content of the heavy metal contaminated soil samples gradually increased,while the failure strain showed a decreasing trend.Compared with the unreinforced samples,the unconfined compressive strength of the reinforced heavy metal contaminated soil samples was increased by 1 to 3 times while the failure strain is reduced by about 0.5 times.

关 键 词：纤维加筋 固化 重金属污染土 冻融循环 工程特性 

分 类 号：TU43[建筑科学—岩土工程]