氯化钠溶液浓度变化对上海软土压缩性的影响研究  

Study on Influence of Sodium Chloride Solution Concentration on Compressibility of Shanghai Soft Soil

作　　者：蒋仕清 于明波 杨德欢[2] JIANG Shiqing;YU Mingbo;YANG Dehuan(Building Materials Guilin Geological Engineering Investigation Institute Co.,Ltd.,Guilin 541002,Guangxi,China;College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,Guangxi,China)

机构地区：[1]建材桂林地质工程勘察院有限公司,广西桂林541002 [2]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《路基工程》2020年第3期70-74,共5页Subgrade Engineering

基　　金：广西建筑新能源与节能重点试验室资助课题(16-J-21-11)。

摘　　要：以上海软土为研究对象,通过一维压缩试验,探究了不同浓度的NaCl溶液在不同初始含水率下压实、饱和后的变形特性。结果表明:不同浓度试样的压缩性随浓度增加而增大,随荷载增加变化趋势更加明显;压力和溶液一定时,土体压缩性随初始含水率减小而增大。从粒间物理化学作用力的变化和孔隙结构的演化角度,解释了孔隙盐溶液浓度变化对上海软土压缩性的影响。Shanghai soft soil was taken as the research object herein to discuss with one-dimensional compression test the deformation characteristics after compaction and saturation under different initial moisture content with NaCl solution in different concentrations.The result shows that,the compressibility of the specimen in different concentrations increases with the increment of concentration and,as the load increases,the change trend is more significant;moreover,when the pressure and solution keep constant,the compressibility of soil mass increases with the decrement of initial water content.From the perspective of the change of inter-particle physicochemical force and the evolution of pore structure,the influence of pore salt solution concentration on the compressibility of Shanghai soft soil is explained.

关 键 词：上海软土 盐溶液 压缩性 渗透压力 双孔隙 

分 类 号：TU447[建筑科学—岩土工程]