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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.11 No.2

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The effect of the shape factor of an underground cavern in good rock conditions on its stability by 2D discontinuum analysis

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2009, v.11 no.2, pp.189-198


& (2009). The effect of the shape factor of an underground cavern in good rock conditions on its stability by 2D discontinuum analysis. (사)한국터널지하공간학회, 11(2), 189-198.

Abstract

Recently the concern about the construction of underground structures such as oil and food storage caverns is increasing in Korea and abroad. The stability of those underground caverns is greatly influenced by shape factor and the size of excavation area as well as the joint conditions. In this study, therefore, the effect of the shape factor of an underground cavern on its stability was analyzed in terms of safety factor. To this end, four different shape factors of a cavern excavated in good rock conditions were investigated and sensitivity analyses were performed based on overburden, lateral earth pressure coefficient, joint spacing, properties, and orientation. The stability of a cavern is evaluated in terms of safety factor estimated numerically based on the shear strength reduction technique. In future, this study is expected to be helpful in designing and evaluating the stability of caverns excavated in discontinuous rock masses.

keywords
지하공동, 형상비, 불연속체 해석, Underground cavern, shape factor, discontinuum analysis

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