Analysis of effects of "5.12" Wenchuan Earthquake on Zipingpu Concrete Face Rock-fill Dam

Zipingpu Concrete Face Rock-fill Dam was considerably damaged by "5.12" Wenchuan Earthquake.The site investigation showed that the maximum permanent settlement was about 100 cm and the horizontal displacement was about 60 cm as a result of the earthquake.The separation between the concrete face and the cushion layer plane was large in area,the dislocation of the construction joints of the concrete face above the reservoir water level was obvious,and the crushed damage of the vertical joints of the concrete face also occurred because of the permanent displacement due to the earthquake.Based on the field investigation,the damage mechanism was analyzed,and proposals were put forward on the future analytical computation of the earthquake effects on concrete face rock-fill dams,anti-earthquake design and the principle for the rehabilitation of the Zipingpu Concrete Face Rock-fill Dam damaged by the earthquake.