季冻区草炭土工程地质特性研究  

Study on engineering geological properties of turfy soil in seasonal frozen region

作　　者：徐燕[1] 佴磊[1] 胡忠君[1] 

机构地区：[1]吉林大学建设工程学院,吉林长春130026

出　　处：《人民长江》2011年第10期17-20,共4页Yangtze River

基　　金：国家自然科学基金资助项目(40772169);吉林省交通厅科技项目:季冻区软土路基沉降研究(20040405);吉林省交通厅项目:靖宇至辉南地方铁路沼泽软土路基渗透固结变形沉降与处理措施优化研究(20030112)

摘　　要：通过对吉林省境内草炭土地区第四纪地质进行研究发现,草炭土地区地层结构为"三元结构",自上而下依次为草炭土、淤泥质土(或黏土)和砂砾石土。草炭土形成的时间为晚第四纪全新世,沉积时代新,出露于浅表。对吉林省广泛分布的草炭土的物质组成和物理力学特性进行分析和总结,得出季冻区草炭土具有低容重、高含水量、大孔隙比、有机质含量高、高压缩性的特点,为草炭土地区路基建设确定切实可行的处治方案提供了可靠的参数依据。Through study on quaternary geology in the turfy soil area of Jilin province,we found the strata framework of the turfy soil area is ＂ternary structure＂,namely turfy soil,muddy soil（or clay） and sandy gravel soil from top to bottom.The formation time for turfy soil is late quaternary holocene era and the characteristics of turfy soil are new deposition and shallow burial depth.By analyzing and summarizing material composition and physical-mechanical properties of turfy soil,we conclude that turfy soil in seasonal frozen region has the characteristics of low density,high water content,large porosity ratio,high organic matter content and high compressibility,providing reliable parameters for determining feasible plan of roadbed construction in the turfy soil area.

关 键 词：草炭土 地层结构 物质成分 工程地质性质 季冻区 

分 类 号：P642[天文地球—工程地质学]