Sublayer Strength Evaluation with FWD in Semi-Rigid Base Asphalt Pavement Rehabilitation Project

This paper used dynamic finite element method (FEM) model instead of continuum elastic layered system to simulate whole or broken semi-rigid base asphalt pavement response under falling weight deflectometer (FWD). Calculating results indicated that the sublayer strength can be evaluated by special FWD deflection basin parameter. Subgrade modulus (Esg) can be well evaluated by Curvature Index CI7 and Shape Factor F8 and the estimated results were not affected by pavement structure cracking condition. Whether Esg greater than 170MPa or not is defined as pavement subgrade failure criteria. Curvature Index CI3 can use to indicate the semi-rigid base layer structural condition and its criteria is CI3 value greater than 60um. This method have been applied and validated successfully in Jialiu Expressway rehabilitation project in Shanghai. It can more precisely distinguish weak sections for pavement rehabilitation design.

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• Corporate Authors:

  American Society of Civil Engineers

  Geo-Institute
  Reston, VA  United States  20191-4400
• Authors:
  • Cong, Lin
  • Lytton, Robert L.
  • Xie, Zhaoxing
• Conference:
  • GeoShanghai 2010 International Conference
  • Location: Shanghai , China
  • Date: 2010-6-3 to 2010-6-5
• Publication Date: 2010

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 392-397
• Monograph Title: Paving Materials and Pavement Analysis

Subject/Index Terms

• TRT Terms: Asphalt pavements; Falling weight deflectometers; Finite element method; Pavement layers; Pavement maintenance; Pavement performance; Rigid pavements; Subbase (Pavements); Subgrade (Pavements)
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01207053
• Record Type: Publication
• ISBN: 9780784411049
• Files: TRIS
• Created Date: Oct 13 2010 2:53PM