岩土工程学报Pub Date : 2014-01-01DOI: 10.11779/CJGE201405001
M. Jiang, Wang-cheng Zhang
{"title":"Coupled CFD-DEM method for soils incorporating equation of state for liquid","authors":"M. Jiang, Wang-cheng Zhang","doi":"10.11779/CJGE201405001","DOIUrl":"https://doi.org/10.11779/CJGE201405001","url":null,"abstract":"","PeriodicalId":39371,"journal":{"name":"岩土工程学报","volume":"29 1","pages":"793-801"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82830915","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}
岩土工程学报Pub Date : 2014-01-01DOI: 10.11779/CJGE201411021
Tao Wang, Jiansheng Chen, Tingting Wang
{"title":"Entropy weight-set pair analysis (SPA) for dam leakage detection","authors":"Tao Wang, Jiansheng Chen, Tingting Wang","doi":"10.11779/CJGE201411021","DOIUrl":"https://doi.org/10.11779/CJGE201411021","url":null,"abstract":"The dam seepage flow contains many kinds of materials, forming the information flow, the information entropy of which can be used to determine the nature of the flow field; and the water chemistry and environmental isotope detection methods have been widely applied. Based on the knowledge of information entropy and set pair analysis, a new method consisting of water chemistry and environmental isotope detection, entropy weight-set pair analysis model, is introduced to ascertain the dam concentration leakage channels. Firstly, PH, conductance, Cl, δD and δO are chosen as five detection indexes, and the connection degree of each index value to the classification standard is calculated. Then, the weight of each index is determined by using the information entropy weight method based on the principle of the maximum entropy. After that, the comprehensive connection degree of all samples from the drilling is calculated, and thus all the samples are classified so as to determine the resource of water. Finally, this new method is applied to detect the dam leakage channels of one south reservoir and the results are tested and improved by the method of horizontal velocity and temperature detection. It is concluded that the results of the entropy weight-set pair analysis model match those of the horizontal velocity and temperature detection very well.","PeriodicalId":39371,"journal":{"name":"岩土工程学报","volume":"184 1","pages":"2136-2143"},"PeriodicalIF":0.0,"publicationDate":"2014-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80544572","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}
岩土工程学报Pub Date : 2010-02-15DOI: 10.1061/41095(365)175
Jianjin Chen, Jian-Hua Wang, R. Liang, Wei-Wei Fan, Wei-dong Wang
{"title":"Behavior of Uplift Pile Foundation during Large-Scale Deep Excavation","authors":"Jianjin Chen, Jian-Hua Wang, R. Liang, Wei-Wei Fan, Wei-dong Wang","doi":"10.1061/41095(365)175","DOIUrl":"https://doi.org/10.1061/41095(365)175","url":null,"abstract":"Soil unloading and rebound induced by large-scale deep excavation may affect the performance and integrity of existing piles inside the excavation zone,especially for up-lift piles.The non-linear finite element is employed to investigate the behavior of the up-lift piles in Shanghai Expo Underground Substation Project during deep excavation.Parameters of the subsoil are obtained by inverse analysis of the load tests on the up-lift piles.The behavior of the up-lift piles during deep excavation and under normal working load is analyzed by using the parameters.Results show that the tension force induced by excavation exerts a more negative influence on up-lift piles than normal piles.Therefore this pretension should be taken into consideration during pile design.Analysis shows the bottom-enlarged up-lift piles are subjected to a larger pretension force during excavation than ordinary up-lift piles.The pretension force of piles under working load can be deduced from the combination of the tension force induced by excavation and the tension force induced by working load.","PeriodicalId":39371,"journal":{"name":"岩土工程学报","volume":"31 1","pages":"1727-1736"},"PeriodicalIF":0.0,"publicationDate":"2010-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90973751","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}
岩土工程学报Pub Date : 2008-01-01DOI: 10.1201/9780203879986-128
Qin Hui-lai
{"title":"Basal stability of braced excavations in K0-consolidated soft clay by upper bound method","authors":"Qin Hui-lai","doi":"10.1201/9780203879986-128","DOIUrl":"https://doi.org/10.1201/9780203879986-128","url":null,"abstract":"The design of braced excavations in soft clays is usually controlled by the short-term undrained stability.The principal stress axial rotation induced by excavation and the undrained anisotropic soil strength were taken into consideration.Assuming the Prandtl soil slip failure modes and considering the anisotropic soil strength recommended by Casagrande and Carillo and the non-homogeneous feature of soft soil,a calculation method for evaluating the basal stability was proposed based on the upper bound analysis.It was indicated by the numerical results that the basal stability was significantly influenced by the anisotropy ratio of soil,the plane geometry of the excavation as well as the thickness of soft soil layer between excavation base and hard stratum.The results were also compared with those calculated by numerical methods.The present method was verified by the field observations of braced excavations.","PeriodicalId":39371,"journal":{"name":"岩土工程学报","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84736732","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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