| Citation: | LIU Xiaolan, ZHANG Xianmin, DONG Qianet al. Correlation analysis model of dynamic and static modulus for subgrade with taxiing aircraft[J]. Journal of Beijing University of Aeronautics and Astronautics, 2019, 45(4): 778-786. doi: 10.13700/j.bh.1001-5965.2018.0428(in Chinese)
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In order to establish dynamic and static modulus correlation analysis model of subgrade with taxiing aircraft, this paper considers the subgrade stress level of taxiing aircraft, compaction degree and moisture content of typical subgrade, and common frequency of taxiing aircraft. Dynamic and static triaxial tests are conducted to analyze the influence of stress level, compaction degree, moisture content and frequency on the dynamic and static modulus of subgrade. The results show that dynamic and static modulus are positively correlated with the compaction degree and confining pressure, and negatively correlated to the moisture content. Especially, the variation amplitude of dynamic modulus is significant when the frequency is less than 3 Hz. Meanwhile, based on dynamic and static modulus measurement databases, dynamic and static modulus conversion system is established and verified with multifactor comprehensive function and taxiing aircraft. The research provides the reference for pavement design, construction, detection and maintenance.
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