上海国土资源
上海國土資源
상해국토자원
2014年
4期
40~43
,共null页
罗立红 邵兴 吕潇文 牛毅
囉立紅 邵興 呂瀟文 牛毅
라립홍 소흥 려소문 우의
黏土 压缩变形 微观结构 孔径分布 有效孔隙率
黏土 壓縮變形 微觀結構 孔徑分佈 有效孔隙率
점토 압축변형 미관결구 공경분포 유효공극솔
land subsidence;clay;compression deformation;microcosmic structure;pore size distribution;effective porosity
地面沉降是天津市平原区的主要地质灾害，产生地面沉降原因之一为地下水开采层内黏性土压缩。为深入认识黏性土压缩变形特征，对不同深度黏土样品进行黏土物质组成、微观结构特征、孔径分布等方面的微观结构测试分析。大于10μm孔隙主要为碎屑颗粒刚性骨架孔隙结构，选取的8组原状样品中的5组孔隙率大于30%，现状黏性土仍处于快速压实阶段；孔隙分布表明，黏土压缩过程主要为大于1μm的孔隙变形，变形后由更细小颗粒填充。分析研究成果对地面沉降防治具有一定指导意义。
地麵沉降是天津市平原區的主要地質災害，產生地麵沉降原因之一為地下水開採層內黏性土壓縮。為深入認識黏性土壓縮變形特徵，對不同深度黏土樣品進行黏土物質組成、微觀結構特徵、孔徑分佈等方麵的微觀結構測試分析。大于10μm孔隙主要為碎屑顆粒剛性骨架孔隙結構，選取的8組原狀樣品中的5組孔隙率大于30%，現狀黏性土仍處于快速壓實階段；孔隙分佈錶明，黏土壓縮過程主要為大于1μm的孔隙變形，變形後由更細小顆粒填充。分析研究成果對地麵沉降防治具有一定指導意義。
지면침강시천진시평원구적주요지질재해，산생지면침강원인지일위지하수개채층내점성토압축。위심입인식점성토압축변형특정，대불동심도점토양품진행점토물질조성、미관결구특정、공경분포등방면적미관결구측시분석。대우10μm공극주요위쇄설과립강성골가공극결구，선취적8조원상양품중적5조공극솔대우30%，현상점성토잉처우쾌속압실계단；공극분포표명，점토압축과정주요위대우1μm적공극변형，변형후유경세소과립전충。분석연구성과대지면침강방치구유일정지도의의。
Land subsidence is the main geological hazard in the plain region of Tianjin, one of the reasons for the clay compression of land subsidence, releasing water compact non-elastic deformation of clay. Testing the microscopic structure of clay at different depths wil provide a deeper understanding of the compression characteristics of clay. This test main from clay material composition, and micro structure features, and aperture distribution, is greater than 10μm pore main for debris particles rigid skeleton pore structure, select of 8 group original samples in the of 5 group pore rate is greater than 30%, status clay stil is fast pressure real stage; for pore distribution, clay compression process main for is greater than 1 μm of pore deformation, deformation by more smal particles ifl ed. Analysis results on ground settlement control work has must of reference value.
