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http://dx.doi.org/10.5762/KAIS.2018.19.10.24

Numerical Analysis of Load Reduction for Underground Arch Structures with Soft Zone Using Expanded PolyStyrene Geofoam  

Kim, Soo-Ha (Department of Civil Engineering, Sangmyung University)
Park, Jong-Sup (Department of Civil Engineering, Sangmyung University)
Kang, Jun-Suk (Department of Landscape Architecture and Rural System Engineering, Seoul National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.19, no.10, 2018 , pp. 24-30 More about this Journal
Abstract
As the demand for underground space increases, many researchers have been studying the load reduction method using high compressible materials to solve for the stability problem of the overhead load and for the increase of the earth pressure which decreases the function of the underground structure. This paper determines the optimum soft zone and the effect of the using EPS Geofoam as a load reduction material to arch structures. A finite element analysis program, ABAQUS, is used to analyze the soil-structure interaction and the behavior of buried arch structures considering different four EPS Geofoam forms to confirm the most conservative shape. The optimum cross-sectional shape was determined by comparing the results of earth pressure reduction rate in accordance with the change of span-rise ratio and span length of the arch structure. It was confirmed that the earth pressure generated in the arch structure using the optimal soft zone selected by the numerical analysis was reduced by an average of 78%. In this study, the effect of EPS Geofoam on soil pressure reduction and its applicability to underground arch structures will provide an economical and conservative way to design underground structures and will help to increase the usability of deep underground space.
Keywords
Arch Structure; EPS Geofoam; Reduction of Earth Pressure; Soft Zone; Soil-Structure Interaction;
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Times Cited By KSCI : 1  (Citation Analysis)
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