A New Building Inflicted by the Kobe Earthquake of January 17,1995and the Measures Taken to Restore and Strengthen the Foundation-Building System(1996)
K.Harasawa（Zenitaka Corp）・M.B.Karkee（GEOTOP）・and H.Kishida（Science University of Tokyo）
A new building in the city of Nishinomiya, near Kobe, was just ready for hand over when the January 17, 1995 earthquake occurred. The building looked structurally intact, but the piles supporting it were found to have been completely damaged. A comprehensive plan involving a tricky simultaneous operation of 61 hydraulic jacks was developed and successfully implemented to jack-up and restore the foundation-building system. Luckily, there were no aftershocks closer in size to the main event during the implementation phase. The differential settlement and tilting were practically nil when the restoration was complete. The experience gained from the project is vital in future restoration and reconstruction of pile foundations damaged by extreme earthquake events.