STUDY OF BEHAVIOR FORECAST-MODEL FOR UNDERPINNING OF PILE FOUNDATION STRUCTURE

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  • ICHINO Michiaki
    社団法人 土木学会 佐藤工業株式会社 東京支店
  • SHIMIZU Yukinori
    社団法人 土木学会 佐藤工業株式会社 東京支店土木部門
  • KOIZUMI Atsushi
    社団法人 土木学会 早稲田大学 理工学部土木工学科

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  • アンダーピニング工事における杭基礎構造物の変位予測手法について
  • アンダーピニング コウジ ニ オケル クイ キソ コウゾウブツ ノ ヘンイ ヨソク シュホウ ニ ツイテ

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Abstract

Forecasting of structure behavior of the underpinning is carried out generally using simple settlement calculation for pile foundations. In actuality, there is not good congruence between forecast values and actual measured values. This cause originates in the interaction between behaviors of existing piles and those of new ones through the ground being disregarded. This paper evaluates the interaction of the existing and new piles, proposing a complex spring model that can explain the behaviors during the underpinning work. It also clarifies the suitability of this structural model by making comparisons of site measurement values.

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