THE USE OF THE CONCEPT OF PAVEMENT BEARING CAPACITY IN AUSTRALIA. A REVIEW OF RESEARCH AND PRACTICE

A very brief review of Australian practice and research in the use of surface deflection under a rolling wheel load as a measure of bearing capacity is given. The research defining pavement cross section, moisture and temperature effects is introduced with mention of laboratory material property studies leading to evaluation of stress/strain and deflection as predicted by elastic multi-layer theory. The current approach to overlay design is stated with evidence from "before and after" studies. Investigation of vibration test methods and use of deflection for assessing load equivalency of specialised vehicles is described. Overseas technology assessed at ARRB includes dynaflect and Lacroix deflectograph. Examples of site specific studies are given with a broad description of system wide applications. Roughness is used in Australia as a measure of serviceability and prediction of life which is related to age rather than traffic. It is concluded that bearing capacity is not uniquely and simply predicted by surface deflection it is affected by pavement cross section, material properties, construction standard and climate. Simple elastic theory is adequate for predicting maximum deflection but the relation between deflection, pavement life, load magnitude and loading rate is still uncertain. It is suggested broad international agreement be sought on common testing and reporting procedures for pavement surface deflection testing under rolling wheel loads. (a) (TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8251904803
• Supplemental Notes:
  • Proceedings of a International Symposium on Bearing Capacity of Roads and Airfields, Volume 1, Trondheim, held June 23-25, 1982.
• Corporate Authors:

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 
• Authors:
  • Metcalf, J B
• Conference:
  • Proceedings of a International Symposium on Bearing Capacity of Roads and Airfields, Volume 1, Trondheim, held June 23-25, 1982.
• Publication Date: 1982

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 1-11

Subject/Index Terms

• TRT Terms: Bearing capacity; Before and after studies; Building materials; Climate; Conferences; Cross sections; Deflection; Deformation curve; Dynaflect; Elasticity (Mechanics); International compacts; Loads; Overlays (Pavements); Pavement design; Pavements; Rolling; Strength of materials; Structural strengthening; Surfacing; Test procedures; Vibration; Wheel loads; Wheels
• Old TRIS Terms: Dynaflect equipment; Elastic theory; Pavement deflection
• ITRD Terms: 3085: Bearing capacity; 8525: Conference; 5586: Deflection; 5567: Load; 2955: Pavement; 3055: Pavement design; 3096: Strengthening (pavement); 2972: Surfacing; 6288: Test method; 5558: Vibration; 1372: Wheel
• Subject Areas: Design; Highways; Pavements; Vehicles and Equipment; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces;

Filing Info

• Accession Number: 00373176
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• ISBN: 82-519-0480-3
• Files: ITRD, TRIS, ATRI
• Created Date: Jun 30 1983 12:00AM