• Tunnel and Underground Space
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• v.7 no.2
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• pp.158-162
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• 1997

• Tunnel and Underground Space
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• v.6 no.2
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• pp.184-187
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• 1996

• Tunnel and Underground Space
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• v.9 no.2
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• pp.89-98
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• 1999

• Tunnel and Underground Space
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• v.9 no.2
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• pp.99-101
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• 1999

• Tunnel and Underground Space
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• v.1 no.2
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• pp.229-240
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• 1991

• Tunnel and Underground Space
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• v.1
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• pp.1-5
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• 1991

• Tunnel and Underground Space
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• v.1
• /
• pp.102-109
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• 1991

• Tunnel and Underground Space
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• v.11 no.3
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• pp.200-205
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• 2001

• Proceedings of the Korean Geotechical Society Conference
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• 2002.03a
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• pp.759-766
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• 2002

In the paper the authors describe the development of ITIS(Intelligent Tunneling Information System) for the Purpose of applying the 3D visualization technique, GIS, AI(Artificial Intelligence) to tunnel design and construction. VR(Virtual Reality) and 3D visualization techniques are applied in order to develope the 3D model of characteristics and structures of ground and rock mass. Database for all the materials related to site investigation and tunnel construction is developed using GIS technique. AI technique such as fuzzy theory and neural network is applied to predict ground settlement, decide tunnel support method and estimate ground and rock mass properties according to tunnel excavation steps. ITIS can help to inform various necessary tunnel information to engineers quickly and manage tunnel using acquired information based on D/B.

• Structural Engineering and Mechanics
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• v.71 no.1
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• pp.77-87
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• 2019

In this paper, the interaction between two neighboring tunnel has been investigated using PFC2D. For this purpose, firstly calibration of PFC was performed using Brazilian experimental test. Secondly, various configuration of two neighboring tunnel was prepared and tested by biaxial test. The maximum and minimum principle stresses were 0.2 and 30 MPa respectively. The modeling results show that in most cases, the tensile cracks are dominant mode of cracks that occurred in the model. With increasing the diameter of internal circle, number of cracks decreases in rock pillar also number of total cracks decreases in the model. The rock pillar was heavily broken when its width was too small. In fixed quarter size of tunnel, the crack initiation stress decreases with increasing the central tunnel diameter. In fixed central tunnel size, the crack initiation stress decreases with increasing the quarter size of tunnel.