CONSIDERING GROUP BEHAVIOR OF FRICTION PILES FOR SETTLEMENT ANALYSIS(2002)
Tomoko Futami（GEOTOP）・Hitoshi Ogura（GEOTOP）・Matsujiro Tomono（GEOTOP)・Masao Matsuo（Yasui Architects＆Engineers Inc.）・Madan B. Karkee（Akita Prefectural University ）
Owing to the prevalence of deep soft soil deposits in most urban areas in Japan, the use of friction piles in foundations supporting low to medium-rise buildings is quite common. Proper design of such foundations hinges on ensuring adequate settlement performance. For this, refinement and development ofmethods for rational evaluation of the spatial distribution of settlement, considering realistic representation of the building-foundation system, becomes necessary. With the advent ofperfonnance based approach to design, evaluation of settlement performance is of particular significance. In this context, the paper introduces a method of representing groups of friction piles in a building by 'virtual single piles' for the purpose of settlement analysis considering the overall building-foundation system. It is found that the analytical results based on the proposed model are similar to those of a detailed model where piles are considered to interact individually, and also compare well with the measurements obtained from field monitoring of a warehouse building supported on friction piles.