YANG Yu-sheng 1, 2, LIU Xiao-sheng 1, 2, ZHAO Jian-ming 1, 2, WANG Xiao-gang 1, 2

1. State Key Laboratory of Simulation and Regulation, IWHR, Beijing 100048, China;
2. Key Laboratory on Construction and Security of Water Projects of Ministry of Water Resources, Beijing 100048, China

Abstract: For alluvial materials and dam materials of large particle size, the constitutive model parameters cannot be determined accurately only by laboratory tests. Thus, the back analysis method based on both laboratory and field tests has received increasing attention in recent years. In back analysis, it is necessary to properly choose the parameters needing to be back analyzed to ensure the result’s uniqueness. The purpose of this paper is to determine the sensitive parameters of Duncan E-B model and discuss factors affecting the sensitivity analysis. The result can be used as the basis of inversion parameters selection, and also can provide a support for the comprehensive evaluation for the stress and deformation analysis of earth and rockfill dams.

Key words: earth-rockfill dam, Duncan E-B model, parameters sensitivity, orthogonal design

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 11 No. 2, 2013)