Numerical analysis and back calculation for embankment dam based on monitoring results (Case study: Iran-Lurestan Rudbar)

Document Type : Article

Authors

1 Department of Civil Engineering, University of Malayer, Hamadan, P.O. Box 65719-95863, Iran

2 Department of Mining Engineering, Isfahan University of Technology, Isfahan, Iran

Abstract

In this paper, comparing the results obtained from monitoring and numerical modeling carried out to significantly help to analyze the stability of embankment dams. comparison of these analyses with the fact they are the precise instrument results, in addition to validating the numerical analysis, is the basis for performing a back analysis to obtain accurate Geotechnical parameters. Accordingly, the final parameters extracted by the back calculation method of materials in the body of earth dams to predict dam performance are the main purpose of this study. In this study, the Rudbar Lurestan dam was selected as a case study and the results of its instrumentation were processed and analyzed. Then, the monitoring results of one of the sections (C5-C5), were selected for analysis and comparison with the numerical model. At first, the model was modeled in a static state at the time of construction. FLAC2D V7 software was used for modeling and simulation was done using Mohr-Coulomb behavioral model and the initial parameters of the material. The observations show that there is a good agreement between the monitoring results of the modeling and also final parameters obtained from the back calculation show a growing trend in most parameters.

Keywords

References

References
[1] ICOLD Dam Failure Statistical Analysis, Bulletin, Paris (1995).
[2] Park, D. Oh, J. “Permeation grouting for remediation of dam cores”, Engineering Geology, 233, pp. 63-75 (2018).
[3] Volkwein, A. Schellenberg, K. et al. “Rockfall characterization and structural protection a review”, Nat Hazard Earth Sys, 11, pp. 2617-2651 (2011).
[4] Lambert, S. Franck, B. “Design of rockfall protection embankments a review”, engineering geology, 154, pp. 77-88 (2013).‏
[5] Clough, R. W. WoodwardJJ, “Analysis of Embankment Stresses and Deformations”, In Proc, ASCE, pp. 529-549(1967).
[6] Chen, S. Gu, C. Lin, C. et al. “Multi-kernel optimized relevance vector machine for probabilistic prediction of concrete dam displacement”, Engineering with Computers, (2020).
[7] Singh, DN, Sivakugan, N. Vanapalli S. K. “Advances in instrumentation and monitoring in geotechnical engineering”, Adva in Civil Eng, pp.1-2 (2011).
[8] Chen, X. Wu, Y. et al. “A two-grid search scheme for large-scale 3-D finite element analyses of slope stability”, Comp and Geotechnics, 62, pp. 203-215 (2014).
[9] Rezaei, M. Salehi, B. “The effect of changing the geometry and compaction degree on arching of earth dams”, In Geo-Frontiers Congress, Amer Soc of Civil Eng, ASCE, pp. 3207-3216 (2011).
[10] Wang, F.Dai, Z. Okeke, CAU. Mitani, Y. Yang, H. “Experimental study to identify premonitory factors of landslide dam failures”, Eng Geology, 232, pp. 123–134 (2018).
[11] Mahinroosta R , Aliadeh  A, Gatmiri B “Simulation of collapse settlement of first filling in a high rockfill dam , Eng Geology, 187, pp. 32-44 (2015).
[12] Little T.E, Imrie AS, Psutka JF “Geologic and Seismic Setting Pertinent to the dam Safety review of Duncan Dam”, Can Geot J 31,pp. 919-926 (1994).
[13] Beiranvand B,Komasi M “Monitoring and numerical analysis of pore water pressure changes Eyvashan dam during the initial impounding period”, J App Res in Water and Wast, 6 , pp.1-7 (2019).
[14] Seyed-Kolbadi, S M, Hariri-Ardebili M, A, Mirtaheri M, & Pourkamali-Anaraki F “Instrumented Health Monitoring of an Earth Dam”, Infrastructures, 5 3, pp.26 (2020).
[15] S. Wang, Y. Xu, C. Gu, T. Bao “Monitoring models for base flow effect and daily variation of dam seepage elements considering time lag effect”, Water Sci. Eng. 11, pp. 344–354 (2018)  .
[16] Guo X, Baroth, J, Dias, D, & Simon A, “An analytical model for the monitoring of pore water pressure inside embankment dams”, Engineering Structures, 160, pp. 356-365 (2018).
[17] Javanmard M, Amiri F,Safavi SM “Instrumentation Readings versus Numerical Analysis of Taham Dam”, Int J Eng, pp. 32:28-35 (2019).
[18] Rashidi M, Heidar M, Azizyan G “Numerical analysis and monitoring of an embankment dam during construction and initial impounding (case study: Siah Sang Dam)”, Scientia Iranica, 25: 505-516 (2018).
[19] Hwang RN “Back analyses in forensic geotechnical engineering”, Geot Eng, 4, pp. 1–8 (2016).
 
 [20] Gikas V, Sakellariou M “Settlement analysis of the Mornos earth dam (Greece) Evidence from numerical modeling and geodetic monitoring”, Eng Str, 30, pp. 3074-3081 (2008).
 [21] Zhou W, Hua J, Chang X, Zhou C“Settlement analysis of the Shuibuya concrete-face rockfill dam”, Comp and Geot, 38, pp. 269-280 (2011).
[22] Delgado J, Garrido J, Lenti L, Lopez-Casado C, Martino S, Sierra FJ“Unconventional pseudo static stability analysis of the Diezma landslide (Granada, Spain) based on a high-resolution engineering-geological model”, Eng Geo, 184, pp. 81-95. (2015).
[23] Zhao C , Lavasan AA, Barciaga T, Zarev V, Datcheva M ,Schanz T“Model validation and calibration via back analysis for mechanized tunnel simulations–The Western Scheldt tunnel case”, Comp Geot, 69, pp. 601-614 (2015).
[24] Zhao K, Bonini M, Debernardi D, Janutolo M, Barla G,Chen G“Computational modeling of the mechanized excavation of deep tunnels in weak rock”,Com Geot, 66, pp.158-171 (2015).
[25] Kutzner C “Earth and rockfill dams Principles for design and construction”, Routledge (2018).
[26] Su H, Zhiping W, Shuai Z, Tian Z“Method for Choosing the Optimal Resource in Back-Analysis for Multiple Material Parameters of a Dam and Its Foundation”,J. Compute. Civ. Eng.ASCE (2015).
[27] Rashidi M, Haeri SM“Evaluation of behaviors of earth and rockfill dams during construction and initial impounding using instrumentation, data and numerical modeling”, Journal of Rock Mechanics and Geotechnical Engineering, 9, pp. 709-725 (2017).
[28] Wen L, J Chai Z, Xu Y Qin, and Y Li “Monitoring and numerical analysis of behaviour of Miaojiaba concrete-face rockfill dam built on river gravel foundation in China”, Comput. Geotech, 85, pp. 230–248 (2017).
 
[29] Pramthawee P, P Jongpradist, and R Sukkarak “Integration of creep into a modified hardening soil model for time-dependent analysis of a high rockfill dam”, Comput. Geotech, 91, pp. 104–116 (2017).
[30] C Liu, C Gu, B Chen, “Zoned elasticity modulus inversion analysis method of a high arch dam based on unconstrained lagrange support vector regression (support vector regression arch dam) ”, Eng. Comput, 33, pp. 443–456 (2017).
[31] Cheng F, Tong, Y Li, J Yang, D Zheng “Comparative study of the dynamic back-analysis methods of concrete gravity dams based on multivariate machine learning models”, J. Earthquake Eng, pp. 1–22 (2018)  .
[32] Lin T, Li X, Liu L, Zhao S, Chen H, Qi, A “deformation separation method for gravity dam body and foundation based on the observed displacements, Struct. “Control Health Monitor”, 26, 2, pp. 2304 (2019).
[33] Iran Water & Power Resources Development Co “Laboratory Tests Report of Rock Mechanics for Rudbar Dam and Powerhouse and Geomechanical Parameters of Dam and Head Race Tunnel, Rudbar Lorestan Dam and Powerhouse Plan”, Second Phase Studies (2007).
[34] Yu Y, Zhang B, Yuan H “An intelligent displacement back-analysis method for earth rock fill dams”, Com Geot, 34, pp. 423-34 (2007).
[35] Gioda G,Sakurai S  “Back analysis procedures for the interpretation of field measurements in Geomechanics. Int J Num Ana Meth Geom”, 11, pp. 555-583 (1987).
 [36] Cividini A, Jurina L,Gioda G “Some aspects of characterization problems in Geomechanics”, Int  J  of Rock Mech Min  Scie Geom  Abs,18, pp.487-503 (1981).
[37] Jeon YS, Yang HS “Development of a back analysis algorithm using FLAC”, International Journal of Rock Mechanics and Mining Sciences, SINOROCK2004 Symposium, 41, pp. 441-447 (2004).
[38] Pan Q, Xu J, Dias D “Three-dimensional stability of a slope subjected to seepage forces”, Int J Geomech 17, 8, 4017035 (2017).
 [39] Waffaian, M.  “Executive information on earth dams”, first edition. Isfahan: Ardakan Publications (2006).
Scientia Iranica
Volume 28, Issue 5
Transactions on Civil Engineering (A)
September and October 2021
Pages 2519-2533

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