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《Yellow River》 2014-03
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Model of the Grade of Shrink and Expansion for the Expansive Soil Based on Entropy-Ideal Point Method

WU Zhong-hu;CHEN Jun;LIU Lei-lei;XIA Yan - yan;College of Resource and Environmental Engineering,Guizhou University;School of Geosciences and Info-Physics,Central South University;  
Due to the shortcomings of single index and multi-index evaluation method in grade of shrink and expansion for the expansive soil,the liquid limit and swell-shrink total ratio,plasticity index,natural moisture content and natural expansion rate were selected as the evaluation index of the grade of shrink and expansion for the expansive soil evaluation,it was evaluated the weights of different indexes by using entropy method, based on the principle of ideal point,the model of entropy-ideal point method of shrink and expansion for the expansive soil had been established. It was firstly created ideal point and negative ideal point matrix about the grade of shrink and expansion,by establishing a distance function to characterize of samples with different grade of shrink and expansion ideal point and the negative ideal point distance,and then introduced the concept of ideal point close to the rate of evaluation sample grades,i. e. the ideal point distance was smaller,close to the rate is smaller and the closer the sample in the grade. Finally,the model of the grade of shrink and expansion was applied to evaluate a project. The results indicate that the assessment level is in good agreement with the actuality,and shows that the model has a certain rationality and practicality.
【Fund】: 贵州大学研究生创新基金资助项目;; 贵州省地质灾害监测预警与决策支持平台建设项目(z113278)
【CateGory Index】: TU443
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