Research on shape optimization of CSG dams  

作　　者：Xin CAI Ying-li WU Jian-gang YI Yu MING 

机构地区：[1]College of Mechanics and Materials, Hohai University, Naijing 210098, P R. China [2]College of Water Conservancy and Hydropower Engineering, Hohai University, Naijing 210098, P. R. China [3]Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, P. R. China

出　　处：《Water Science and Engineering》2011年第4期445-454,共10页水科学与水工程（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 51179061);the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 20100094110014)

摘　　要：The multi-objective optimization method was used for shape optimization of cement sand and gravel （CSG） dams in this study. The economic efficiency, the sensitivities of maximum horizontal displacement and maximum settlement of the dam to water level changes, the overall stability, and the overall strength security were taken into account during the optimization process. Three weight coefficient selection schemes were adopted to conduct shape optimization of a dam, and the case studies lead to the conclusion that both the upstream-and downstream dam slope ratios for the optimal cross-section equal 1：0.7, which is consistent with the empirically observed range of 1：0.6 to 1;0.8 for the upstream and downstream dam slope ratios of CSG dams. Therefore, the present study is of certain reference value for designing CSG dams.The multi-objective optimization method was used for shape optimization of cement sand and gravel （CSG） dams in this study. The economic efficiency, the sensitivities of maximum horizontal displacement and maximum settlement of the dam to water level changes, the overall stability, and the overall strength security were taken into account during the optimization process. Three weight coefficient selection schemes were adopted to conduct shape optimization of a dam, and the case studies lead to the conclusion that both the upstream-and downstream dam slope ratios for the optimal cross-section equal 1：0.7, which is consistent with the empirically observed range of 1：0.6 to 1;0.8 for the upstream and downstream dam slope ratios of CSG dams. Therefore, the present study is of certain reference value for designing CSG dams.

关 键 词：CSG dam shape optimization sensitivity ANALYSIS 

分 类 号：TV64[水利工程—水利水电工程] TQ333.4[化学工程—橡胶工业]