MECHANICAL BEHAVIOR OF GROUND BOTTOM HEAVE DUE TO EXCAVATION

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  • 土留め掘削底部地盤におけるリバウンドの力学挙動解析
  • ドドメ クッサク テイブ ジバン ニ オケル リバウンド ノ リキガク キョド

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Abstract

This paper discusses the mechanical behavior of ground bottom heave due to excavation. First, the heave fluctuation actually measured at 3 large-scale excavations are discussed. Then, the heave mechanism in examined by comparing the measured values with theoretical values obtained from coupled stress-flow finite element analysis. Furthermore, elastic moduli under load removal conditions (Er), for layers composed of sand and clay, are estimated by back analysis. The local iterated extended Kalman filter of control theory combined with finite element method is applied to the back analysis in order to consider probabilistic features of measured values.

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