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seepage analysis of Upper Gotvand Dam concerning gypsum karstification(2D and 3D approaches)

Frontiers of Structural and Civil Engineering 2011年第1期5卷 71-78页

作者： Jamshid SADREKARIMI Majid KIYANI Behnam FAKHRI Mohammad Javad VAHDATIRAD Amin BARARI Faculty of Civil Engineering University of TabrizTabrizIran Faculty of Civil Engineering University of MazandaranBabolIran Department of Cicil Engineering Aalborg UniversitySohngårdsholmsvej 57Aalborg 9000Denmark

Upper Gotvand Dam is constructed on the Karun River at the south west of *** this paper,2D and 3D models of the dam together with the foundation and abutments were established,and several seepage analyses were carried ***,the gypsum veins that are scattered throughout the foundation ground were included in the models,and the seepage pattern,considering the dissolution law of gypsum,was *** was disclosed that the discharge fluxes obtained from 2D and 3D analyses are not similar,and the discharge flux in 3D model is about four times that of the 2D ***,the 3D model locates the phreatic surface somewhat higher than the 2D *** means that the 2D model estimates lower pore water pressure pattern in comparison with the 3D *** may be attributed to the fact that with 2D model the lateral components of vectors of seepage velocity are *** the current case,the rate of increase of discharge flux due to dissolution of gypsum veins was obtained to be a thirdorder function of the aperture *** spite of the fact that the grout curtain is designed to be about 170 m deep,however,complete dissolve of gypsum will severely increase the discharge flux through the foundation ground.

关键词： Upper Gotvand Dam seepage analysis gypsum veins 3D model discharge flux

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Experimental Study on Permeability Characteristics of Geotubes for seepage analysis on Safety Assessment of Dams

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Structural Durability & Health Monitoring 2020年第4期14卷 339-353页

作者： Xiaolei Man Ganggang Sha Shuigen Hu Hui Bao Guangying Liu School of Civil and Architectural Engineering Chuzhou UniversityChuzhou239000China College of Mechanics and Materials Hohai UniversityNanjing210098China

Geotubes are heterogeneous structures composed of filling sand and bag material,and its pemeability characteristics are different from that of flling *** uncertainty of geotubes permeability characteristics results in the failure of seepage analysis of geotube dams,which restricts the safety assessment of the *** the basis of the study on the seepage mechanism of the geotubes,the influence of particle grading on pemeability cofficient of flling sand and sand covered with geotextiles were explored by the pemmeability tests of flling sand with different particle grading under the condition of sand covered with or without *** the infuence of geotextiles on the permeability coefficient was analyzed by comparing permeability coefficient of sand covered with and without *** test results show that the influence of single particle size content on permeability coe ficient is consistent under the condition of sand covered with and without *** content of powder,fine,medium and coarse particles is linearly related to their respective permeability *** the content of powder,fine,medium particles is negatively correlated with their permeability coefficients,while the content of coarse particles is positively correlated with the permeability *** the pemeability coefficient of sand covered with geotextiles is smaller than that of flling sand under the same ***,the parameter d2 50 Cc/Cu was selected as a variable representing the particle grading to fit the empirical formula of permeability coefficient of flling sand and sand covered with geotextiles.

关键词： Geotextile flling sand permeability cofficient geotube dam seepage analysis safety assessment

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Application of entropy-based fuzzy matter-element analysis in seepage monitoring of RCC dam

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Frontiers of Structural and Civil Engineering 2011年第1期5卷 105-111页

作者： Chongshi GU Zhijun ZHANG Xin CAI Yue HOU State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210098China National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai UniversityNanjing 210098China

Taking account of the fuzzy results of the seepage monitoring analysis of roller compacted concrete(RCC)dam and uncertainties of the individual indicator evaluation,the fuzzy matter-element model of seepage monitoring of RCC dam analysis has been established with the use of the fuzzy matter-element analysis theory and the concept of euclid approach *** use of entropy theory can calculate the weighting factor through the disorder utility values of the information reflected by the data itself,which can effectively avoid the problems of weight distribution and uncertainties of subjective judgments of the seepage monitoring analysis of roller compacted concrete *** further the example shows that the analysis of entropy-based fuzzy matter-element analysis model of the seepage monitoring of roller compacted concrete dam is in accordance with the actual situation,which verifies the effectiveness of the method.

关键词： information entropy fuzzy matter-element roller compacted concrete(RCC)dam seepage analysis

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Prediction of mine drainage generation potential and the prevention method of the groundwater pollution in the Gümüskoy(Kütahya)mineralization area,NW Turkey

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Journal of Mountain Science 2020年第10期17卷 2387-2404页

作者： Selcuk ALEMDAG Enver AKARYALI Mehmet Ali GuCER Department of Geological Engineering Faculty of Engineering and Natural SciencesGumusşhane UniversityGumushane29100Turkey

One of the leading factors of seepage contamination is mine drainage,which creates serious ecological risks on the environment both during operation and post-mining *** this study,experimental processes have been carried out to determine the occurrence of mine drainage in the Gümüskoy(Kütahya)mineralization area(Northwest Turkey).The prevention method for potential mine drainage occurrence has been also *** enrichment was observed which are directly related to mineralization in trace element concentrations,especially in potentially toxic metals such as Ag,Cd,Mo,Ba,Bi,and *** on short-term tests,mine drainage formation has not been expected according to the p H(7.36-9.38),contact leaching,and acid-base accounting ***,in the long-term,acid generation potential has been expected because of weathering and oxidation in terms of rock type and mineralization in the ***,in order to prevent groundwater contamination in the event of a possible formation of mine drainage,the hydraulic conductivity of the stock area bedrock was evaluated by the in situ tests performed in the field and it was found to be moderately permeable(K=1.9×10^-6 m/s).In order to make the stock area bedrock impermeable,natural clay will be laid and compressed at the base of the stock *** the finite elements were modeled by seepage analysis,the seepage discharge to be formed on the base rock at a depth of 5 m was determined as 3.17×10^-19 m^3/*** the discharge value determined in the seepage analysis after modeling is very close to zero,contamination of possible ground and surface water will be prevented.

关键词： Ecological risks Environmental assessment Mine drainage seepage analysis

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Determination of hydraulic conductivity of fractured rock masses:A case study for a rock cavern project in Singapore

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Journal of Rock Mechanics and Geotechnical Engineering 2015年第2期7卷 178-184页

作者： Zhipeng Xu Zhiye Zhao Jianping Sun Ming Lu School of Civil and Environmental Engineering Nanyang Technological University Thomson Line Division of Rail Group Land Transport Authority

In order to reduce the risk associated with water seepage in an underground rock cavern project inSingapore, a reliable hydro-geological model should be established based on the in situ investigationdata. The key challenging issue in the hydro-geological model building is how to integrate limitedgeological and hydro-geological data to determine the hydraulic conductivity of the fractured rockmasses. Based on the data obtained from different stages （feasibility investigation stage, constructionstage, and post-construction stage）, suitable models and methods are proposed to determine the hydraulicconductivities at different locations and depths, which will be used at other locations in thefuture. 2015 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting byElsevier B.V. All rights reserved.

关键词： Rock caverns Hydraulic conductivity Fractured rock masses seepage analysis

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MECHANISM OF OCEAN CURRENT-INDUCED SUSPENDING OF SUBMARINE PIPELINE

MECHANISM OF OCEAN CURRENT-INDUCED SUSPENDING OF SUBMARINE P...

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中国力学学会学术大会'2005

作者： Yang Bing Gao Fuping Wu Yingxiang Zheng Zhichu (Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China)

The pipe span is a potential threat to the pipeline’s safety, so it is essential to analyze the mechanism of the pipeline’s suspending properly when designing pipelines. In this paper, the mechanism of submarine pipeline’s suspending under the current action is studied by means of numerical simulation. The incompressible N-S equation is solved and the property of the flow around the pipe under the ocean current action is analyzed. The

关键词： submarine pipe ocean current suspending seepage analysis

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