Model tests for anti-breaking performance of a fiber reinforced concrete tunnel lining

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (13) : 50-56.

CUI Guangyao1，WANG Libin1，WANG Mingnian2，WANG Daoyuan3,4

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Abstract

In order to study anti-breaking performance of fiber reinforced concrete tunnel lining, Jiujiawan fault F2-3 interval tunnel segment in a metro project was taken as the study background to conduct model tests for anti-breaking performance of a fiber reinforced concrete tunnel lining in a high-intensity seismically active fault zone. The study results showed that the anti-breaking effect of the principal stress of the fiber reinforced concrete tunnel lining reaches 30%-40%, the anti-breaking effect of its longitudinal strain reaches 80%-90%, the minimum value of the structural safety coefficient is increased by 4-5 times; compared to a steel fiber reinforced concrete lining, the anti-breaking effect of the fiber reinforced concrete one is better, the anti-breaking security of a steel-polypropylene hybrid fiber concrete lining is the highest, the minimum value of the structural safety coefficient is 1.62; toughening action of fiber reinforced concrete is stronger than its strengthening one in improving the anti-breaking performance of a tunnel; these results are significant to improve the anti-breaking performance of a tunnel in high-intensity seismically active fault zone.

Key words

tunnel engineering / high-intensity earthquake through active fault zone；fiber reinforced concrete；

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CUI Guangyao1，WANG Libin1，WANG Mingnian2，WANG Daoyuan3,4. Model tests for anti-breaking performance of a fiber reinforced concrete tunnel lining[J]. Journal of Vibration and Shock, 2019, 38(13): 50-56

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