Pub Date : 2016-07-25DOI: 10.3876/J.ISSN.1000-1980.2016.04.0013
C. Jiansheng, He Huixiang, Wang Tao
Aiming at detecting the concentrated leakage passage in a dam, an entropy weight-variable fuzzy set model for dam leakage detection was developed based on information entropy theory and variable fuzzy set theory. Using a dam in southern China as an example, the indices to be detected were determined first, followed by the weight of each index via the entropy weight method in the objective weight assignment method. Then, the comprehensive membership degrees of different borehole water samples to precipitation, leakage water, and groundwater, as well as the H value of each water sample, were obtained. Based on these values, the borehole water samples were classified and their origins were determined. The results show that there are four concentrated leakage passages in the dam, which accords with previous findings.
{"title":"Dam leakage detection based on entropy weight-variable fuzzy set model","authors":"C. Jiansheng, He Huixiang, Wang Tao","doi":"10.3876/J.ISSN.1000-1980.2016.04.0013","DOIUrl":"https://doi.org/10.3876/J.ISSN.1000-1980.2016.04.0013","url":null,"abstract":"Aiming at detecting the concentrated leakage passage in a dam, an entropy weight-variable fuzzy set model for dam leakage detection was developed based on information entropy theory and variable fuzzy set theory. Using a dam in southern China as an example, the indices to be detected were determined first, followed by the weight of each index via the entropy weight method in the objective weight assignment method. Then, the comprehensive membership degrees of different borehole water samples to precipitation, leakage water, and groundwater, as well as the H value of each water sample, were obtained. Based on these values, the borehole water samples were classified and their origins were determined. The results show that there are four concentrated leakage passages in the dam, which accords with previous findings.","PeriodicalId":38455,"journal":{"name":"Journal of Hohai University","volume":"29 1","pages":"358-363"},"PeriodicalIF":0.0,"publicationDate":"2016-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84296097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2014-01-01DOI: 10.3876/J.ISSN.1000-1980.2014.01.006
J. Zhu, X. Gong, J. Zhou, W. Jin, J. Yin
The stress-strain behavior and shear strength of gravelly soil at different shearing rates were investigated through a triaxial consolidated-drained shear test on the gravelly soil of a core rockfill dam. The results show that regardless of the level of the shearing rate,the stress-strain behaviors of the gravelly soil exhibited various degrees of hardening and shear shrinkage under different confining pressures. As the shearing rate increased,the hardening gradually strengthened but the shrinkage weakened. The peak deviatoric stress( σ1- σ3)f decreased remarkably with the increase of the shearing rate,and the intensity index φ decreased significantly. In the range of testing shearing rates,the secant modulus E1 decreased with the increase of the shearing rate,and the bulk modulus K1 increased initially,and then decreased with the increase of the shearing rate.
{"title":"Large-scale triaxial tests on behavior of gravelly soil at different shearing rates","authors":"J. Zhu, X. Gong, J. Zhou, W. Jin, J. Yin","doi":"10.3876/J.ISSN.1000-1980.2014.01.006","DOIUrl":"https://doi.org/10.3876/J.ISSN.1000-1980.2014.01.006","url":null,"abstract":"The stress-strain behavior and shear strength of gravelly soil at different shearing rates were investigated through a triaxial consolidated-drained shear test on the gravelly soil of a core rockfill dam. The results show that regardless of the level of the shearing rate,the stress-strain behaviors of the gravelly soil exhibited various degrees of hardening and shear shrinkage under different confining pressures. As the shearing rate increased,the hardening gradually strengthened but the shrinkage weakened. The peak deviatoric stress( σ1- σ3)f decreased remarkably with the increase of the shearing rate,and the intensity index φ decreased significantly. In the range of testing shearing rates,the secant modulus E1 decreased with the increase of the shearing rate,and the bulk modulus K1 increased initially,and then decreased with the increase of the shearing rate.","PeriodicalId":38455,"journal":{"name":"Journal of Hohai University","volume":"6 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78486346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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