Settlement Evaluation of a Concrete Face Rock-Fill Dam (CFRD) Using a Back-Analysis Method Based on Measurement Results (A Case Study of Siah-Bisheh Dam)

Mohammad Ali Abedian, Farhang Farrokhi, Reza Rasouli


The behavior of the Siah-Bisheh concrete face rock-fill dam in Mazandaran, Iran was investigated. Numerical analyses were performed before construction to evaluate the stability and predict the deformation of the dam. The material properties were chosen based on the results of geotechnical investigations. The amounts for deformation and settlement of the concrete surface were also calculated with the numerical model. The information from a number of geotechnical instruments was collected after construction and analyzed to measure settlement at different sections of the dam. The locations of the different deformations and their values are presented with various contours. The data were analyzed and used to revise the original numerical model of the dam. Following that, the long-term stability of the dam was evaluated, using parameters that were modified based on the measurement data. A comparison of the results from the numerical analysis and the values obtained from the dam settlement measurement showed that the initial results from the numerical model were much higher than the real values. It also showed that the number of construction layers used in the modeling of the dam had a significant effect on the obtained maximum amount of deformation.


Back analysis; concrete-face rock-fill dam (CFRD); instrumentation; settlement; Siah-Bisheh Dam

Full Text:



Cook, J.B. & Sherard, J.L., Concrete Face Rock-Fill Dams-Design, construction and performance, 1st ed., ASCE, pp. 5-7, 1985.

Hunter, G. & Fell, R., Rock-Fill Modulus And Settlement of Concrete Face Rock-Fill Dams, J Geotech Geoenviron Eng, 129(10), pp. 909-917, 2003.

Yang, Z.Y. & Jiang, G.C., Deformation Control Techniques For 200 M-High Hongjiadu Concrete Face Rock-Fill Dam, Chin J Geotech Eng, 20(8), pp. 1241-1247, 2008.

Zhou, W., Chang, X.L., Zhou, C.B. & Liu, X.H., Creep Analysis Of High Concrete-Faced Rock-Fill Dam, 1st ed., Commun Numer Meth Eng, pp. 1477-1492, 2009.

Szostak, A. & Massiéra, M., Relation Between Monitoring and Design Aspects of Large Earth Dams, In: 3rd IAG/12th FIG symposium, Baden, pp. 22-24, 2006.

Li, J.C., Gouhou Dam and Analysis For Causes of the Dam Failure, Chin J Geotech Eng, 16(6), pp. 1-14, 1994.

Cook, J.B., Process in Rock-Fill Dams. The 18th Terzaghi Lecture, J Geotech Eng, ASCE, 110(10), pp. 1383-1414, 1984.

Li, N.H., New Concept of Design for High Concrete Face Rock-Fill Dams, Chin J Geotech Eng, 29(8), pp. 1143-1150, 2007.

Jing, L., A Review of Techniques, Advances and Outstanding Issues in Numerical Modelling for Rock Mechanics and Rock Engineering, Int J Rock Mech Mining Sci, 40(4), pp. 283-353, 2003.

Hua. J.J., Zhou. W., Chang. X.L. & Zhou. C.B., Study of Scale Effect on Stress-Deformation of Rock-Fill, Chin J Rock Mech Eng, 29(2), pp. 328-335, 2010.

Cetin, H., Laman, M. & Ertunc, A., Settlement and Slaking Problems in The World’s Fourth Largest Rock-Fill Dam, the Ataturk Dam in Turkey, Eng Geol, 56(1), pp. 225-242, 2000.

Szostak-Chrzanowski, A., Chrzanowski, A. & Massie, M., Use of Deformation Monitoring Results in Solving Geomechanical Problems – Case Studies, Eng Geol, 79(1), pp. 3-12, 2005.

Yu, Y.Z., Zhang, B.Y. & Yuan, H.N., An Intelligent Displacement Back-Analysis Method for Earth-Rock-Fill Dams, Comput Geotech, 34(1), pp. 423-434, 2007.

Gikas, V. & Sakellariou, M., Settlement Analysis of the Mornos Earth Dam (Greece): Evidence from Numerical Modeling and Geodetic Monitoring, Eng Struct,; 30(1), pp. 3074-3081, 2008.



  • There are currently no refbacks.