• Journal of the Korean GEO-environmental Society
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• v.10 no.6
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• pp.35-48
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• 2009

An excessive ground displacement occurs with excavating tunnel in a fault zone because the fault has properties of soft ground in generally. It may have had a bad influence to adjacent structure. So, rapid reduction of ground strength by groundwater inflow should be prevented. It must be established for an impervious and reinforcing effect of ground to ensure a tunnel stability. The ground settlement and reinforcing effects were estimated by numerical analyses on tunnel through 570 m sector in Yangsan fault zone of Keongbu high-speed railway. Settlements evaluated by numerical analysis is similar to those calculated by using equation of Loganathan & Poulo. It was shown that reliable estimate of ground settlement by applying a prediction equation is possible. Applicability of adopted tunnel reinforcement method in fault zone was investigated by results of pilot construction and numerical analysis. Results from this study indicate that the adopted reinforcement method make tunnel displacements and member stresses restrain in design criteria.

• Journal of the Korean Geotechnical Society
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• v.23 no.5
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• pp.15-27
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• 2007

This paper deals with the bearing capacity behaviour of geosynthetic-reinforced stone column(GRSC) constructed in soft ground, as part of an investigation regarding the applicability of GRSC in Korea. In this study, two-dimensional finite element analyses were performed to investigate the effect of relevant design factors on the bearing capacity behaviour. The parametric study is performed for various influencing factors. The results indicated that the geogrid encasement tends to significantly improve the load carrying capacity of a stone column. Also found were that the geogrid encasement length and its stiffness significantly affect the load carrying capacity behaviour of GRSC, and that the encasement length of three times the stone column diameter is sufficient in mobilizing the full reinforcement effect. Practical implications of the findings are discussed.

• Geotechnical Engineering
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• v.29 no.9
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• pp.22-33
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• 2013

• Geotechnical Engineering
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• v.30 no.3
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• pp.22-32
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• 2014

• Geotechnical Engineering
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• v.22 no.3
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• pp.39-47
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• 2006

• Geotechnical Engineering
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• v.24 no.2
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• pp.35-45
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• 2008

• Geotechnical Engineering
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• v.23 no.6
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• pp.33-38
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• 2007

• Proceedings of the Korean Geotechical Society Conference
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• 1998.10a
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• pp.121-128
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• 1998

• Geotechnical Engineering
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• v.28 no.7
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• pp.10-17
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• 2012

• Geotechnical Engineering
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• v.36 no.6
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• pp.38-47
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• 2020