›› 2010, Vol. 31 ›› Issue (6): 1822-1826.

• Geotechnical Engineering • Previous Articles     Next Articles

Analysis of influence depth for roads induced by vehicle load

QIU Min-yu，YU Ya-nan   

  1. College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
  • Received:2009-01-06 Online:2010-06-10 Published:2010-06-25

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Abstract:

FEM with viscoelasitic boundary element was proposed to discuss the depth significantly influenced by vehicle load. This method is proved by Lamb’s analytical solution and the field test of Lian-Yan expressway. Then, using this method, the effect of vehicle speed and resilient modulus of road structures on the variation of subgrade response at different depths was investigated. The results indicate that the dynamic stress is not enough to describe the settlement characteristics, especially in clay roadbed; and vertical dynamic strain is suggested to define the effective depth induced by traffic load. The depth is about 6－10 m in soft soil roadbed. It has important significance in design treatment of subgrade and controlling post-construction settlement.

Key words: vehicle load, FEM with viscoelastic boundary, very small strain, influence depth

CLC Number: 

  • TU 435.5
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