Abstract
The seismic isolation retrofit of the main building of the National Museum of Western Art required excavating The foundation ground under the existent building and installing isolation devices, it was necessary to construct Piles beneath the existing footings in order to support the weight of the building temporarily during excavation process. The piles were made of steel pile segments, and were driven by oil jacks utilizing the weight of the building for reaction force. During the retrofitting process, the subsidence of the building supported by the piles were monitored and controlled to avoid causing damage to the structure. The purpose of this study is to definite the vertical displacement of the existent building and the behavior of the temporary pressed-in pile constructed here.
