工程地质学报
工程地質學報
공정지질학보
2013年
6期
959-966
,共8页
曾斌%王青薇%刘清秉%黄定强%董忠萍
曾斌%王青薇%劉清秉%黃定彊%董忠萍
증빈%왕청미%류청병%황정강%동충평
膨胀土分级评判%Fisher判别分析法%人工神经网络%粗糙集理论
膨脹土分級評判%Fisher判彆分析法%人工神經網絡%粗糙集理論
팽창토분급평판%Fisher판별분석법%인공신경망락%조조집이론
Hierarchic evaluation of expansive soil%Fisher’s discriminant analysis%Artificial neural network%Rough sets theory
膨胀土的膨胀潜势由于受到诸多因素的控制，其量化分级长期以来都是一个未能得到很好解决的难题。本文以南水北调中线“引江济汉”工程渠坡膨胀土为研究对象，通过对试验数据的分析，给出了膨胀土分类的建议取值；依据该分类标准，综合人工神经网络、Fisher判别分析以及粗糙集理论3种数学方法，对40组土样的膨胀等级进行了综合性指标的判别分析，通过比较研究，确定了最终的分级结果；根据每种数学方法的判别结果与操作方法，基于理论相对简单、操作简便、易于为广大科研工作者接受的原则，建议优先考虑Fisher判别方法对膨胀土进行分级评判；结合样品的蒙脱石含量，给出了分级标准的建议值，验证了膨胀土分级数学方法的可靠性，从而为“引江济汉”工程后续开挖渠道段膨胀土的分类及判别提供了理论依据。
膨脹土的膨脹潛勢由于受到諸多因素的控製，其量化分級長期以來都是一箇未能得到很好解決的難題。本文以南水北調中線“引江濟漢”工程渠坡膨脹土為研究對象，通過對試驗數據的分析，給齣瞭膨脹土分類的建議取值；依據該分類標準，綜閤人工神經網絡、Fisher判彆分析以及粗糙集理論3種數學方法，對40組土樣的膨脹等級進行瞭綜閤性指標的判彆分析，通過比較研究，確定瞭最終的分級結果；根據每種數學方法的判彆結果與操作方法，基于理論相對簡單、操作簡便、易于為廣大科研工作者接受的原則，建議優先攷慮Fisher判彆方法對膨脹土進行分級評判；結閤樣品的矇脫石含量，給齣瞭分級標準的建議值，驗證瞭膨脹土分級數學方法的可靠性，從而為“引江濟漢”工程後續開挖渠道段膨脹土的分類及判彆提供瞭理論依據。
팽창토적팽창잠세유우수도제다인소적공제，기양화분급장기이래도시일개미능득도흔호해결적난제。본문이남수북조중선“인강제한”공정거파팽창토위연구대상，통과대시험수거적분석，급출료팽창토분류적건의취치；의거해분류표준，종합인공신경망락、Fisher판별분석이급조조집이론3충수학방법，대40조토양적팽창등급진행료종합성지표적판별분석，통과비교연구，학정료최종적분급결과；근거매충수학방법적판별결과여조작방법，기우이론상대간단、조작간편、역우위엄대과연공작자접수적원칙，건의우선고필Fisher판별방법대팽창토진행분급평판；결합양품적몽탈석함량，급출료분급표준적건의치，험증료팽창토분급수학방법적가고성，종이위“인강제한”공정후속개알거도단팽창토적분류급판별제공료이론의거。
Swelling potential of expansive soil is controlled by many factors.So quantitative classification of expan-sive soil is always a problem and is not solved well.This paper takes the expansive soil in the Water Transfer Pro-ject from the Yangtze River to Han River in middle scheme of the South-to-North Water Diversion Project as the research object.Through analysis of experimental datas,this paper gives the suggested value of classification stand-ard of the expansive soil.Based on three mathematical methods of artificial neural network model,the Fisher’s dis-criminant analysis and rough sets theory,comprehensive indexes are used to analyze the swelling potential of 40 ex-pansive soil samples.This paper determines the final classification results through comparative study of the three mathematical methods.According to the classification results and operation method of each mathematical method, based on the theory of relatively simple,easy to operate and easy to accept,this paper suggests that the Fisher’s discriminant analysis can be a priority to analyze the swelling potential of expansive soil.In addition,this paper also gives the suggested value of classification standard of montmorillonite content,which verifies the correctness of clas-sification results.The results of this paper provide a theoretical basis for the identification and classification of ex-pansive soil in the process of the rest of excavation.
