PREDICTION OF HORIZONTAL DEFORMATION OF LARGE SCALE SEAWALL BY ELASTO-VISCOPLASTIC FINITE ELEMENT ANALYSIS

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  • 弾粘塑性FEM解析による大規模護岸構造物の変形予測

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D runway at the Tokyo international airport (Haneda airport) consists of the land reclamation and pier sections. The design working life of the runway is given as 100 years. Steel pipe sheet-pile cellular seawall using high-strength pipe junction is applied to the connecting section between the land reclamation and pier sections. So as to achieve the long design working life, it is important for the design of the seawall to realize the accurate prediction of the long-term lateral displacement of the seawall due to the high embankment in the land reclamation section. In this paper, the authors conduct the soil/water coupled elasto-viscoplastic finite element analysis to evaluate the long-term lateral displacement of the cellular seawall. The constitutive model, proposed by Sekiguchi and Ohta (1977) with the modified cam clay type yield surface, is used in the analysis to improve the prediction accuracy of the deformation of soft clays.

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