Abstract
When a high-rise building and a low-rise building have a common basement floor supported by friction piles, differential settlement can be reduced by controlling length of friction piles. Heavy loaded high-rise building area is supported by long length piles and light loaded low-rise building area is supported by short length piles in the concrete. This paper describes a case history adopted this foundation type and comparison between field measurements and numerical analysis results of simple calculation method and elasto-plastic finite element method.