弱膨胀土膨胀性判别与分级方法研究
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摘要
针对弱膨胀土在路基工程中使用时的不同要求,可对弱膨胀土的膨胀性进行分级以方便采用不同的处治措施来减少经济损失.为避免使用单一判别因子判别法对弱膨胀土进行分级的不足,因此,以自由膨胀率、胀缩总率、塑性指数和小于0.002mm颗粒含量这4项作为判别指标,分别利用Bayes判别法、Fisher判别法和物元可拓判别法3种方法,建立相应的判别函数对弱膨胀土进行分级,将弱膨胀土的膨胀性分为强(G_1)、中(G_2)、微(G_3)3个等级,并对比3种方法.研究表明:这3种判别法都能较理想的用于弱膨胀土膨胀性的分级中,且相对于其他两种方法,Fisher判别法更方便、高效.
For the different requirements of weak expansive soils used in subgrade engineering,the expansibility of weak expansive soils can be graded to facilitate the use of different treatment measures and to reduce economic losses.In order to avoid the disadvantage of using a single discriminant factor method to classify weak expansive soils,the four parameters of free expansivity,total shrinkage rate,plasticity index,and particle content less than 0.002 mm were used as the discriminant indicators.The three methods of Bayes discriminance,Fisher discriminance and matter-element extension discriminant were respectively used to establish the corresponding discriminant function to classify the weak expansive soil,and the expansibility of weak expansive soil was divided into strong(G_1),medium(G_2)and micro(G_3)three levels,then the three methods were compared.The results show that these three methods can be ideally used to classify the expansibility of expansive soils.In addition,the Fisher discriminant method is more convenient and efficient than the other two methods.
For the different requirements of weak expansive soils used in subgrade engineering,the expansibility of weak expansive soils can be graded to facilitate the use of different treatment measures and to reduce economic losses.In order to avoid the disadvantage of using a single discriminant factor method to classify weak expansive soils,the four parameters of free expansivity,total shrinkage rate,plasticity index,and particle content less than 0.002 mm were used as the discriminant indicators.The three methods of Bayes discriminance,Fisher discriminance and matter-element extension discriminant were respectively used to establish the corresponding discriminant function to classify the weak expansive soil,and the expansibility of weak expansive soil was divided into strong(G_1),medium(G_2)and micro(G_3)three levels,then the three methods were compared.The results show that these three methods can be ideally used to classify the expansibility of expansive soils.In addition,the Fisher discriminant method is more convenient and efficient than the other two methods.
引文
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[16]马静,刘敦文,鞠加元,等.基于熵权物元可拓模型的复工高速公路路基质量评价[J].世界科技研究与发展,2016,38(5):1035-1039.MA J,LIU D W,JYU J Y,et al.Evaluation on subgrade quality of rebuilding highway based on entropy-weight and matter-element extension model[J].World Sci-tech R&D,2016,38(5):1035-1039.
[2]刘章军.膨胀土判别与分类的模糊概率模型及应用[J].公路交通科技,2010,27(3):1-5.LIU Z J.Fuzzy probability model of identification and classification of expansive soil and its application[J].Journal of Highway and Transportation Research and Development,2010,27(3):1-5.
[3]王冲,王起才,张戎令,等.基于主成份分析法的高速铁路膨胀土判别研究[J].铁道科学与工程学报,2017,14(8):1571-1578.WANG C,WANG Q C,ZHANG R L,et al.Discriminant analysis of high speed railway expansive soil based on principal component analysis[J].Journal of Railway Science and Engineering,2017,14(8):1571-1578.
[4]宿晓萍,王亭亭,潘明远,等.加权距离判别法在膨胀土胀缩等级分类中的应用[J].长春工程学院学报(自然科学版),2015,16(1):34-37.SU X P,WANG T T,PAN M Y,et al.Application of weighted distance discriminant method in classification of swelling shrinkage grade of expansive soil[J].Journal of Changchun institute of technology(Natural Science),2015,16(1):34-37.
[5]赵月萍.膨胀土分类的分形插值评价方法[J].人民黄河,2015,37(6):91-94.ZHAO Y P.Fractal interpolation evaluation method for the classification of expansive soil[J].Yellow River,2015,37(6):91-94.
[6]何芳婵,李宗坤.南水北调南阳段弱膨胀土增湿膨胀与力学特性试验研究[J].岩土力学,2013,34(2):191-194.HE F C,LI Z K.Experimental study of wetting expansibility and mechanical properties of weak expansive soil in Nanyang section of South-to-North Water Diversion Project[J].Rock and Soil Mechanics,2013,34(2):191-194.
[7]高游,孙德安,吕海波,等.弱膨胀土浸水变形特性及其预测[J].岩土力学,2015,36(3):755-761.GAO Y,SUN D A,LYU H B,et al.Deformation characteristics of weakly expansive soil and its prediction[J].Rock and Soil Mechanics,2015,36(3):755-761.
[8]张俊然,孙德安,姜彤,等.宽广吸力范围内弱膨胀土的抗剪强度及其预测[J].岩土工程学报,2016,38(6):1064-1070.ZHANG J R,SUN D A,JANG T,et al.Shear strength of weakly expansive soils and its prediction in a wide range of suction[J].Chinese Journal of Geotechnical Engineering,2016,38(6):1064-1070.
[9]文松松,梁维云,陈永健,等.弱膨胀土的膨胀特性试验研究[J].工程地质学报,2017,25(3):706-714.WEN S S,LIANG W Y,CHEN Y J,et al.Experimental study of swellng characteristics of weak expansive soil[J].Journal of Engineering Geology,2017,25(3):706-714.
[10]戴佑才,钟诚.基于贝叶斯判别分析方法的膨胀土胀缩等级分类[J].公路工程,2011,36(5):125-127.DAI Y C,ZHONG C.Classification of expansion and shrinkage grade of expansive soil based on Bayesian discriminant analysis[J].Highway Engineering,2011,36(5):125-127.
[11]文畅平.基于Bayes判别分析法的冲击地压预测与危险性分级[J].自然灾害学报,2015,24(5):229-236.WEN C G.Prediction and hazard classification of bumping geopressure based on Bayes discriminant analysis method[J].Tournal of Natural Disasters,2015,24(5):229-236.
[12]梁仕华,文畅平.膨胀土判别与分类的Bayes判别分析法[J].力学与实践,2008,3(6):73-76.LIANG S H,WEN C P.Bayes discriminant analysis for the identification and classification of expansive soil[J].Mechanics in Engineering,2008,3(6):73-76.
[13]卢国斌,张瑾.膨胀土胀缩等级分类的Fisher分析判别[J].辽宁工程技术大学学报(自然科学版),2013,32,(11):1476-1479.LU G B,ZHANG J.Fisher analysis and discrimination of expansion and shrinkage classification of expansive soil[J].Journal of Liaoning Technical University(Natural Scienc Edition),2013,32,(11):1476-1479.
[14]李进前,王起才,张戎令,等.基于Fisher分析的高速铁路地基膨胀土判别方法[J].铁道建筑,2017,57(8):73-77.LI J Q,WANG Q C,ZHANG R L,et al.Based on fisher analysis of high-speed railway foundation expansive soil identification method[J].Railway Engineering,2017,57(8):73-77.
[15]李颢,张凤安.物元可拓模型对内蒙古地区膨胀土判别的应用[J].中国地质灾害与防治学报,2010,21(1):114-116.LI H,ZHANG F A.The application of matter-element extension model to the discrimination of expansive soil in Inner Mongolia area[J].The Chinese Journal of Geological Hazard and Control,2010,21(1):114-116.
[16]马静,刘敦文,鞠加元,等.基于熵权物元可拓模型的复工高速公路路基质量评价[J].世界科技研究与发展,2016,38(5):1035-1039.MA J,LIU D W,JYU J Y,et al.Evaluation on subgrade quality of rebuilding highway based on entropy-weight and matter-element extension model[J].World Sci-tech R&D,2016,38(5):1035-1039.