The Layer L₁and S₁of Loess Liquid Limit And Plastic Limit Reasonable Determination Method Of Research

Liquid limit and plastic limit is the most basic physical properties of soil, liquidlimit and plastic limit experimental determination is the most basic of geotechnicalexperiment test for a project to provide the basis for the related and design parameters,but also the foundation to monitor and control one of the important methods.Experiments to the layer L₁, S₁of the loess in Xi’an city as the research object, thedetermination of liquid limit with the cone heavy, and the cone Angle and sinking depthand sinking of the time the four factors change rule. For the joint locator, it changes thefour factors, according to match a type calculate table arrangement of emperiment withtwo orthogonal regression which design experiment analysis of experimental data, thefour factors determine the influence of moisture content of equations。Influence ofliquid plastic limit four factors of single factor and their interactions between the impactanalysis, that affecting the liquid plastic limit is the main factors taper cone Angle, coneAngle and depth of sinking, using extremum method to obtain the biggest moisturecontent that is liquid limit and plastic limit rolling method to determine the rub. NorthL₁, S₁to the analysis of the measured liquid limit less than S₁liquid limit underlined theadhesion of L₁less than the main force of the S₁stick together gather force.Through the soil lager L₁, S₁liquid plastic limit analysis, the soil L₁, that measuredS₁liquid limit were40.8%and43.7%, each generation of L₁, regulating the S₁formula,for the ministry of communications and water conservancy and hydropower departmentdetermination of the liquid limit and the liquid limit experiment is less than1%, and theconstruction of foundation standard and mor of measured liquid limit and difference ofthe measured data of experiment for5%, explain the construction of foundation and theministry of railways provisions of the liquid limit much error.100g cone of weight,30°cone Angle and sinking depth20.8mm and76g cone heavy,30°cone Angle andsinking depth16.7mm the measurement of moisture content is more accurate.