珠江三角洲软土工程特性的微观机理探索  

MICROSCOPIC MECHANISM STUDY ON ENGINEERING PROPERTIES OF SOFT SOIL IN PEARL RIVER DELTA

作　　者：周晖[1] 李勇 

机构地区：[1]广州城建职业学院,广州510925 [2]广东省有色金属地质勘查局地质勘查研究院,广州510080

出　　处：《工业建筑》2011年第7期82-86,共5页Industrial Construction

摘　　要：通过对珠三角典型软土样固结过程的微观结构观测、压汞分析和矿物成分分析,定量研究不同固结荷载下软土的微孔隙形态、尺度分布、颗粒定向性等微观参数随荷载的变化规律。研究表明,固结压力将显著改变软土的孔隙尺度分布、颗粒的定向性,以致改变土体的压缩性和渗透性。固结前期孔隙尺度较大,颗粒排列较紊乱,压缩系数和渗透系数较大并随固结压力增加而快速减小,固结后期孔隙尺度较小,颗粒定向性明显增加,压缩系数和渗透系数也较小且趋于平缓。Using micro-structure observation,instrusive mercury and mineral analyses of consolidation process of typical soft soil samples from the Pearl River Delta,it is quantitatively researched into the changing low of micro-parameters,such as the form of micropores,the pore-scale distribution,the directionality of particles,etc with variation of its consolidation loads.The results show that the pore-scale distribution,the directionality of particles,the compressibility and permeability of the silt soil are significantly changed by the consolidation loads.In the early consolidation,the soil is large pore-scale,disordered particles,large compression coefficient and permeability coefficient,which rapidly decrease with the increase of pressure.However,in the late consolidation,the pore-scale reduces,the directionality of particles increases obviously,compression coefficient and permeability coefficient are also smaller and change slowly.

关 键 词：珠三角软土 孔隙尺度分布 颗粒定向性 工程性质 

分 类 号：TU411[建筑科学—岩土工程]