不同因素对浅表土冻结温度的影响  

Effect of different factors on the freezing temperature of shallow top soil

作　　者：张婷[1] 杨平[1] 

机构地区：[1]南京林业大学土木工程学院,江苏南京210037

出　　处：《南京林业大学学报（自然科学版）》2009年第4期132-134,共3页Journal of Nanjing Forestry University：Natural Sciences Edition

基　　金：江苏省"六大人才高峰"资助项目(2004);南京地下铁道有限公司资助项目(2008)

摘　　要：通过自制的冻结温度试验装置,以南京地区浅表土为研究对象,分析了淤泥质黏土、淤泥质粉质黏土、粉砂3种不同土质在不同含水率、盐分含量以及不同水质条件下的冻结温度规律。结果表明:在试验的含水率范围内,土体冻结温度随含水率增加呈近似线性升高,随盐分含量增加直线降低,而干密度的变化对土体冻结温度影响不大。The shallow top soil in Nanjing was selected as the sample to investigate,the freezing temperature was measured by self-developed equipment. Freezing temperatures of different soils, such as muddy clay, silty clay, mealy sand, at different moisture content, salt content and water quality were analyzed. The results showed that soil freezing temperature enhanced nearly-linearly with moisture content increasing at the equipmental condition. On the other hand, soil freezing temperature decreased sharply with the salt content increasing. However, changes of dry density had hardly influence on freezing temperature.

关 键 词：冻结温度 土质 含水率 含盐量 干密度 

分 类 号：P534.63[天文地球—第四纪地质学] TD265.34[天文地球—古生物学与地层学]