Long-Term Deformation Analysis of the Jiudianxia.pdf

Arab J Sci Eng (2014) 39:1589–1598 DOI 10.1007/s13369-013-0788-6 RESEARCH ARTICLE - CIVIL ENGINEERING Long-Term Deformation Analysis of the Jiudianxia Concrete-Faced Rockfill Dam Lei Gan · Zhen-zhong Shen · Li-qun Xu Received: 26 May 2012 / Accepted: 13 July 2013 / Published online: 6 September 2013 ? King Fahd University of Petroleum and Minerals 2013 Abstract Creep deformation of rockfills affects anti-see page systems, such as concrete face, toe slab, and periph- eral joint. In particular, it may cause structure damage, such as water stop failure and concrete face cracking, especially in a high concrete-faced rockfill dam (CFRD) on a deep over- burden layer. In this paper, viscoelastic constitutive models for concrete materials and bedrocks (a new creep constitu- tive model for rockfills) are introduced. A comprehensive study method on the stress and deformation of a high rockfill dam on a deep overburden layer is established based on field plate loading tests, laboratory triaxial creep tests, and pro- totype monitoring data analysis. The long-term deformation characteristics of JiudianxiaCFRDwith complex topography and geological characteristics are analyzed and forecasted by using three-dimensional nonlinear finite element model analysis considering the effect of creep. The deformation of the damshows an evident increment comparedwith thatwith- out considering the creep effect. Rockfill creep obviously influences the deformation and stress of the concrete-face slab.Meanwhile, comparative study of numerical calculation results andmonitoring data showed good agreement between the computed settlements and measured values. Overall, the creep model and the adopted parameters are demonstrated to be reasonable, and the deformation of Jiudianxia CFRD is basically stable. L. Gan · Z. Shen (B) · L. Xu State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China e-mail: shen6627@; zhzhshen@ L. Gan e-mail: ganlei2015@