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Settlement of Runway Subgrade Under Moving Aircraft Loads

YANG Fei1,YANG Yuliang2,SUN Lijun1(1.School of Transportation Engineering,Tongji University,Shanghai 201804,China;2.Shanghai Airport Construction Headquarters,Shanghai 201202,China)  
A method for calculating settlement of runway subgrade induced by moving aircraft loads is proposed based on more than 6 years measured settlement data in Pudong international airport.A logarithm model was adopted to fit the measured settlement data before the runway was opened to air traffic,and the difference between dead loads induced settlement and measured settlement was viewed as the settlement induced by moving aircraft loads.The calculation results show that settlement of runway subgrade induced by moving aircraft loads occupies 31% of the total settlement in the 5th year and the proportion will increase with time.Moving aircraft loads are proposed to be taken into consideration in subgrade design.
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