TECHNIQUE FOR EVALUATION OF EARTHWORK CONSTRUCTION

When the dynaflect response is poor, it is necessary to evaluate the cause and thereafter to study remedies in order to achieve good response. A field procedure has been devised by the RRC to locate the defective area when such poor dynaflect response if found. The deflections occurring within finite layers of earthwork due to the applied dynamic load of dynaflect at the surface were measured by special probes. The resistance of different layers are then found by a static penetrometer. From the measured deflection and resistance values, and by the aid of a computer program for the stress distribution at different depths, the relative stiffness of various layers could be estimated. The layer(s) contributing disproportionately to the total deflection is thus identified. In such cases, investigations of such layers revealed improper construction faults which generally were not revealed by standard quality control tests. (Author/TRRL)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/8251904803
• Supplemental Notes:
  • Proceedings of the International Symposium on Bearing Capapcity of Roads and Airfields, Volume 2, Trondheim, June 23-25, 1982.
• Corporate Authors:

  Tapir

  Trondheim University, Gloeshaugen
  Trondheim-NTH,   Norway 
• Authors:
  • Guirguis, H R
  • Mesdary, M S
  • Kumar, R
• Conference:
  • Proceedings of the International Symposium on Bearing Capapcity of Roads and Airfields, Volume 2, Trondheim, June 23-25, 1982.
• Publication Date: 1982

Media Info

• Features: Figures; Photos; References;
• Pagination: p. 702-710

Subject/Index Terms

• TRT Terms: Computer programs; Conferences; Deflection; Deformation curve; Dynaflect; Earthwork; Evaluation; Evaluation and assessment; Loads; Measurement; Measuring instruments; Pavement layers; Penetrometers; Static penetration test; Stiffness; Strength of materials; Stresses; Subgrade (Pavements)
• Old TRIS Terms: Dynaflect deflections; Resistance
• ITRD Terms: 6155: Apparatus (measuring); 8525: Conference; 5586: Deflection; 3653: Earthworks; 9020: Evaluation (assessment); 2952: Layer; 5567: Load; 6136: Measurement; 6294: Static penetration test; 5931: Stiffness; 5544: Strength (mater); 5575: Stress (in material); 2950: Subgrade
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00376477
• Record Type: Publication
• Source Agency: Swedish National Road and Transport Research Institute (VTI)
• ISBN: 82-519-0480-3
• Report/Paper Numbers: Proceeding
• Files: ITRD, TRIS
• Created Date: Aug 30 1983 12:00AM