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Monitoring and numerical analysis of pore water pressure changes Eyvashan dam during the first dewatering period | ||
| Journal of Applied Research in Water and Wastewater | ||
| مقاله 1، دوره 6، شماره 1 - شماره پیاپی 11، فروردین 2019، صفحه 1-7 اصل مقاله (1.49 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22126/arww.2019.1017 | ||
| نویسندگان | ||
| Behrang Beiranvand* ؛ Mehdi Komasi | ||
| Department of Civil Engineering, Faculty of Engineering, Ayatollah ozma Borujerdi University, Borujerd, Iran. | ||
| چکیده | ||
| The performance of dams due to high operating costs and irreparable damages caused by failures in the construction phase and during the dewatering and exploitation period should verified and monitored by proper behavioural analysis. Dewatering the dams will result in the saturation of the embankment and supports and, consequently, the reduction of the stability coefficient. Therefore, in order to allow an earth dam to tolerate the new conditions easily and without problems, the rate of dewatering should be within the range. In this study, pore water pressure in the body of Eyvashan earth dam was evaluated. The water level inside the clay core due to changes in the reservoir water level during the first dewatering and using the actual specifications of the materials by Geostudio and Plaxis software and compared with the results of the instrumentation in the dam body. In order to adapt the observed and predicted data, a multi-variable regression was used and the coefficient of determination was used and respectively the value of R2=0.9834 and R2=0.9863 was obtained which shows a very good agreement between the observed and predicted data. Indicating that the cache water pressure values and their occurrence are in good agreement with the initial design conditions and that the barrier behaviour is stable in terms of pore water pressure. Installed piezometers upstream of the core show a higher pressure than the downstream, due to the high saturation state of the phreatic line. Also, the height of pressure in the downstream of cut off in the results of numerical modelling and in the observed results has suddenly decreased, which indicates the correct function of the injection cut off. | ||
| کلیدواژه‌ها | ||
| Pore water pressure؛ Dewatering؛ Eyvashan earth dam؛ Instrumentation؛ Cut off | ||
| اصل مقاله | ||
| مراجع | ||
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Abhilasha P.S., Antony Balan T.G., Numerical Analysis of Seepage in Embankment Dams, Journal of Mechanical and Civil Engineering 4 (2014) 13–23. Clough R.W., and Woodward R.J., Analysis of Embankment stresses and deformations, Journal of Soil Mechanics and Found 93 (1967) 529–549. Haghighi S., and Jafar Gholizadeh H., A simple method for calculating the leakage amount from earth dams foundation the blanket and cut off wall, Journal of the Civil and Environmental Engineering Tabriz University 75 (2014) 87–93. Jannati P., and Mohammadi M., Investigation of excess pore pressure of pore water created by earthquake in the clay core of soil dams under the influence of nucleus, 9th Iranian Hydraulic Conference, Tehran (2010). Javanmard M., Amiri F., Safavi S.M., Instrumentation reading versus Numerical Analysis of Taham Dam, International Journal of Engineering (IJE) 32 (2019) 28–35. Johansson S., and Dahlin T., Seepage monitoring in an earth dam by repeated resistivity measurements, European Journal of Engineering and Environmental Geophysics 1 (1997) 229–247. Lorestan Regional Water Company, Eyvashan Earth Dam Project, (2012). Luo J., Zhang Q., Liang L., Xiang W., Monitoring and characterizing the deformation of an earth dam in Guangxi Province, China, Engineering Geology 248 (2018) 50–60. Mir Mohammad Hosseini S.M., and Mousavi Khansari M., Evaluation of pore pressure at the core of Karkheh dam during construction and dewatering, Water Engineering Journal 2 (2009) 37–48. Moradi S., and Esmaeili K., Investigation of pore water pressure in the body of earth dams in stages of construction by the Plexis software, Case Study of Khaki Damghanf Dam, 2th Conference on Civil Engineering, Architecture and Urban Management, Tehran (2017). Nayebzadeh R., and Mohammadi M., Static analysis of soil dams affected by clay core formation, Proceedings of the 4th National Civil Engineering Congress Tehran, (2000). Nobari E.S., and Duncan J.M., Effect of reservoir filling on stresses and movements in earth and rock fill dams. Army engineers waterways experimental station, Vicksburg Mississippi (1972). Rahimi H., Earth Dams, Third edition, Tehran University Press, (2011)131–132. Rashidi M.S., and Haeri M., Evaluation of behaviors of earth and rock fill dams during construction and initial impounding using instrumentation data and numerical modeling, Journal of Rock Mechanics and Geotechnical Engineering 9 (2017) 709–725. Waffaians M., Soil Dams, first edition, Publishing Center of Jihad Construction of Isfahan Industrial Complex, (1988). Zienkiewicz O.C., The finite element method in engineering science, 3rd Edition, McGraw-Hill, London (1977). | ||
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