Abstract
Carbon fibers (CF) which have the characteristics of reliable strength, durability and slow bio-degradation rate, was used for static liquefaction resistance of loose sand. The effect of fiber length (3, 6, 10 mm) and fiber content (0.2, 0.5, 0.7, 1.0%) that will influence the liquefaction characteristics of reinforced soils was investigated in detail by a series of undrained triaxial compression tests. The results show that the inclusion of randomly distributed carbon fibers in loose sand is an effective measure for static liquefaction mitigation, and liquefaction resistance increased with the increase of fiber length and fiber content. The stress-strain relationships, development of pore water pressure and liquefaction brittleness index of the tested samples were analyzed. The results show that with the continuous increase of fiber length and content, an effective increase in both the peak and post-peak strength of the reinforced samples was observed. Especially when the content of 10 mm CF up to 1%, the peak deviator stress increased by 65.8% compared with the clean sand in undrained triaxial compression tests at the confining pressure of 100 kPa.
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