Geotechnical-Structural Interaction for Innovative Mat Design


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Title: Geotechnical-Structural Interaction for Innovative Mat Design

Author(s): C. N. Baker, Jr.

Publication: Special Publication

Volume: 152


Appears on pages(s): 203-218

Keywords: deformation; loads (forces); mat foundations; piles; settlement (structural); soils; Design

Date: 3/1/1995

Describes three innovative mat foundation designs and the close interaction required between the structural engineer and the geotechnical engineer. The significance of load deformation prediction reliability in the three different soil profiles is illustrated. The cases reviewed include a three-story office building with single basement build on a mat over peat; a 26-story apartment building with basement built on a modified mat in a thin dense sand stratum over soft clay; and a 19-story hotel with two basements built on a mat in a sand layer over medium clay. The mat of the 19-story hotel was supplemented with selective high capacity piles at the column locations designed to ultimate soil capacity at working loads and utilized to reduce both mat settlement and design mat thickness. The instrumentation used to confirm design assumptions in the three cases is briefly described.