Quarterly Report of RTRI
Online ISSN : 1880-1765
Print ISSN : 0033-9008
ISSN-L : 0033-9008
PAPERS
Development of Spread Foundation Composed of Micropiles and Soilbags to Reduce Seismic Response of Structures
Tatsuya DOISeiji YAMADAYoshitaka MURONOHo CHO
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2020 Volume 61 Issue 3 Pages 215-221

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Abstract

The authors have developed a new type of foundation composed of micropiles and soilbags. The foundations are characterized by the laying of soilbags on pile heads and the construction of structures such as piers and rigid frame viaducts on the soilbags. The expected benefits are elimination of the need for pile-footing connections, a smaller diameter of piles, and a reduction in the response acceleration of structures. In this study, in order to clarify the characteristics of the seismic response of the developed structure, shaking table tests targeting piers on the supporting ground and on the developed structure were carried out. Moreover, reproduction analyses of shaking table tests were conducted using a 2D FEM model, and the seismic response of the developed structure was successfully reproduced using the proposed analysis model.

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© 2020 by Railway Technical Research Institute
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