›› 2009, Vol. 30 ›› Issue (12): 3865-3870.

• Numerical Analysis • Previous Articles     Next Articles

Research on differential settlement index of high-filled subgrade after construction in mountainous airport

GU Qiang-kang1, 2, LI Ning1, HUANG Wen-guang2   

  1. 1. Institute of Geotechnical Engineering, Xi'an University of Technology, Xi'an 710048, China; 2. Department of Airport Engineering, Airforce Engineering University, Xi’an 710038, China
  • Received:2008-10-16 Online:2009-12-10 Published:2010-01-18

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Abstract:

Based on the theory of Westercard to calculate rigid pavement PCN value on the middle of a slab, a 3D finite element analysis model is established for rigid airport pavement in mountainous area considering the "subgrade-pavement-aircraft loading" interaction, the slab joint loading-transfer character and the differential settlement of embankment. Applying this method, fifteen groups of computational analysis models are established, and their feasibilities are verified by Westercard theory and Bisar software according to gathered ACN values of the domestic main civil aviation freighters. Studies show that differential settlement of subgrade is in linear relationship with maximum tensile stress, a control of 1‰ differential settlement for subgrade is reasonable in high-filled airport project, for pavement with designed strength above 5.0 MPa, 1.2‰ differential settlement for subgrade is permitted.

Key words: mountainous airport, high-filled subgrade, rigid pavment joints, differential settlement, mechanical response, 3D finite elements

CLC Number: 

  • TU 457
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