Seismic Observation of Piled Raft Foundation Supporting a 10-Story RC Residential Building Adjacent to a Pile Foundation Building

Abstract

This paper presents a case of seismic observation of a piled raft foundation for a 10-story RC building adjacent to a pile foundation building. The acceleration of the first basement floor, axial strain and bending strain of the pile, earth pressure and water pressure beneath the raft around the piles were measured. Seismic observations started on July 17, 2016, and seismic events including M 7.4 have been observed about 380 times in site. The relationship between the bending strain of the pile and the inertia force of the building, the relationship between the axial strain of the pile and the bottom earth pressure, etc., has been investigated. The difference between the behavior of the foundation during the period including main shock in which inertial force of the building were dominant and that during the subsequent period was clearly observed.