Research On Preconsolidation Pressure Of Soil

The preconsolidation pressure is the maximum effective stress in the process ofsoil formation has endured in geological history. Soil preconsolidation pressure is animportant index for determining the consolidation status. But on how to obtainpreconsolidation pressure of the soil there are some limitations. In this paper, Weanalyzed the data of preconsolidation pressure. More in-depth understanding of thetheory of soil preconsolidation pressure. Through consolidation tests，research the testresults and relevant data of soil preconsolidation pressure. Discuss the MathematicalModel method of how obtaining preconsolidation pressure. Based on Casagrandemethod, analysis and determine the fitting mathematical model of soilpreconsolidation pressure curve. Then the value is compared with thepreconsolidation pressure test. The influence factors of the preconsolidation pressureis analyzed, at the same time, in-situ testing method for determining preconsolidationpressure makes a preliminary theoretical exploration. Mainly include:（1）Through to the narrative summary that studies of the structure and thepreconsolidation pressure, summarize the structure and Preeonsolidation Pressureexerts a tremendous influence to settlement calculation of area in soil. Discuss themajor issues about the study of structural and soil preconsolidation pressure, analysisof the formation mechanism of the preconsolidation pressure, And do the theoreticalanalysis on Influencing Factors of the preconsolidation pressure.（2）In this paper, widely used in the international on the calculation method ofpreconsolidation pressure are analyzed, In view of the limitations of the traditionalmethods， The mathematical model of determining preconsolidation pressure arestudied in the paper. Select the appropriate mathematical model and calculated withthe compute program complier by Matlab, and then compare the valueanalysis andpreconsolidation pressure test.（3）Expounds the significance of the preconsolidation pressure. Details of thelaboratory test method of determining preconsolidation pressure,And the factorsaffecting indoor of determining preconsolidation pressureand the matters needingattention during the test. At the conclusion of the Piezocone Penetration Test (CPTU)based on the test for determining the stress based on the research achievements ofhistory, do a theoretical research about in situ test the preconsolidation pressure.By comparing the fitting results of testing and mathematical model, It is provedthat the mathematical model on the data fitting to solve the preconsolidation pressureis feasible.