膨胀土与改良土胀缩性等级评价  

Classification model for shrinkage-swelling of expansive clay and improved expansive clay

作　　者：李健[1] 徐鹏[1] 秦帅[1] 汪明武[1] 

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2013年第8期969-973,共5页Journal of Hefei University of Technology：Natural Science

基　　金：国家自然科学基金资助项目(41172274)

摘　　要：文章探讨了基于粗糙集理论和功效系数法的膨胀土与改良土胀缩性等级评价新模型,即选取容易测定的液限、胀缩总率、塑性指标、天然含水率和自由膨胀率作为评价因子,应用粗糙集理论进行评价指标约简和客观赋权,进而基于功效系数法构建相应的胀缩性等级评价模型,并实际应用于合肥新桥国际机场膨胀土地基处理工程中的胀缩性评价,进而与集对分析法、可变模糊集合法和模糊数学方法判别结果作了对比,结果表明基于粗集功效系数法评价膨胀土和改良土胀缩性等级是有效可行的,且预测结果较好地反映了实际工程情况,也为其他类似评价问题提供了新的思路和方法。A novel classification model based on rough set theory and efficacy coefficient method is presented. Firstly, the following evaluation indexes are selected, liquid limit, total shrinkageswelling, plasticity index, natural water content and flee swelling rate. Then, the rough set theory is applied to reducingattributes and calculating objective weight. Finally, the shrinkage and swelling grade classification model is established by the efficacy coefficient method. This new method is introduced to evaluate the shrinkageswelling for the ex pansive clay foundation treatment of Xinqiao International Airport in Hefei. The results are in good agreement with practical situation and those obtained by set pair analysis method, variable fuzzy set method and fuzzy mathematical method, which suggests that this novel model is feasible and can provide new ideas and methods for similar evaluation problems.

关 键 词：膨胀土 改良土 胀缩性 功效系数法 粗糙集 

分 类 号：TU443[建筑科学—岩土工程]