doi:10.16186/j.cnki.1673-9787.2020.3.17

Received:2019/06/03

Revised:2019/07/28

Published:2020/05/15

Evaluation of expansion and shrinkage grade of improved expansive soil based onentropy weight intuitionistic fuzzy set

GAO Shuzeng1,2, ZHANG Yan1

1.College of Energy and Transportation Engineering， Inner Mongolia Agricultural University， Hohhot 010018 ，Inner Mongolia ， China;2.First Engineering Co. ，Ltd. ， China Railway Shanghai Engineering Bureau Group ，Wuhu  241000 ， Anhui， China

Abstract:In order to accurately evaluate the expansion and shrinkage grade of the improved expansive soil， so as to adopt the corresponding disposal measures in the actual project to reduce the occurrence of the disaster of the improved expansive soil foundation， on the basis of comprehensive consideration of the shortcomings of traditional methods and the characteristics of expansive soil， five quantitative evaluation indexes were selected to establish an index evaluation system， and the weight of each index was determined by entropy method. The entropy weight-intuitionistic fuzzy set model was established by combining the intuitionistic fuzzy sets with outstanding advantages in the field of fuzzy processing， and the quantitative evaluation of the expansion and shrinkage grade of the improved expansive soil was realized. Four groups of expansive soils with different amount of coal gangue were used to verify the model， and the results were compared with those of Ke Zunjing classification， fuzzy mathematics method and expansion potential method. The results showed that the entropy weight-intuitionistic fuzzy set model had good practicability and reliability for the evaluation of swelling and shrinkage grade of coal gangue improved expansive soil， and it provided a reference for the evaluation of similar improved soil.

Key words:improved expansive soil;expansion and shrinkage;entropy weight intuitionistic fuzzy set;grade evaluation

基于熵权直觉模糊集的改良膨胀土胀缩性等级评价_高树增.pdf