提高液塑限联合测定试验精度的方法  

Method for Raising Accuracy of Limit Moisture Content in Combined Measurement of Liquid and Plastic Limits

作　　者：彭意[1] 李铀[1] 彭强[2] 

机构地区：[1]中南大学土木建筑学院,长沙410075 [2]华容县榕城工程建设监理有限公司,湖南岳阳414200

出　　处：《土工基础》2007年第4期81-84,共4页Soil Engineering and Foundation

基　　金：湖南省科技计划重点项目(No.05FJ2006);中南大学科学研究基金(No.76163)资助课题

摘　　要：根据国标《土工试验方法标准》(GB/T50123-1999)液塑限联合测定法的规定,给出了高含水率的点和其余两点连成二条直线在2 mm处含水率的差值的表达式,进而获得了在误差允许范围的液塑限的数学表达式。相对于作图法,应用数学表达式计算获得结果可大大提高工作效率,提高精度。此外探讨了为提高液塑限联合测定试验中界限含水率的精度,试验点如何选取较合理的问题,并提出了改进方法。According to Combined Measurement Method of liquid and plastic limits from ＂Standard for soll test method＂ （GB/ T50123-1999）, the point of high moisture content and other two points can form two straight lines. The difference expression of moisture conteht has been given at 2mm of the two lines, and expression for liquid and plastic limits, which is fallen in the scope allowed by error, is＇obtained, too. Compared with the method to obtain result from graph, new method can raise work effectiveness and accuracy of Limit Moisture Content, which gets result from calculation of the above mentioned mathematic expression. In addition, to raise measurement accuracy of limit moisture content, how to select experiment points is discussed, and modification suggestion is presented.

关 键 词：液塑限联合测定 界限含水率 精度 

分 类 号：TU411[建筑科学—岩土工程]