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FULL-SCALE TESTING OF NEW HYBRID FOUNDATION
Yutaka Fujita, Kiyoshi Ishii, Eiji Ogisako.
Takaki Sakurai, Kazutaka Nakayama and Atsuo Onoue
ABSTRACT: A hybrid foundation consisting
of a mat foundation and a small number of complementary bearing
piles was developed based on a completely new concept and applied
to a building construction project in order to evaluate its effectiveness
and applicability. The new concept is to maintain a constant pile
axial force to avoid pile fracturing even if the building settles
due to consolidation of the subsoil. Measured items were the axial
forces of the piles, the deformation and settlement of the building,
and the relative displacement between the piles and the mat. Then
the measurements were compared with a numerical analysis. The
measurements show that the reaction control device installed at
the head of the pile worked effectively and the comparison between
analytical and measured values shows that the behavior of the
hybrid foundation can be numerically predicted in the design process.
Key words: building settlement, hybrid_foundation,
numerical analysis, pile axial force, pile foundation, reaction
control device, shallow foundation (ICC: E2/H1)
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