초록

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Abstract ▼ AI-Helper

As the plan to subsea tunnels was announced in Korea, how to secure fire-resistance of the concrete linings in shield tunnels has been emerging as an important issue. Reinforced concrete segment used inside of shield tunnels is structural member which resists loads such as earth pressure or hydrauli...

As the plan to subsea tunnels was announced in Korea, how to secure fire-resistance of the concrete linings in shield tunnels has been emerging as an important issue. Reinforced concrete segment used inside of shield tunnels is structural member which resists loads such as earth pressure or hydraulic pressure. Since high-strength concrete having compressive strength of over 40 MPa is used, significant damage to the segment is foreseeable upon a fire unless elaborate measures are taken against a fire. Therefore, in this study to find how to improve safety of concrete structure in shield tunnels, damage range observed from full-scale fire resistance test was compared with that observed from fire resistance test provided by the EFNARC (European Federation for Specialist Construction Chemicals and Concrete Systems) and the behaviors of concrete linings in the fire tests were evaluated.

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