EVALUATION OF IN SITU SOIL MODULI BASED ON FALLING WEIGHT DEFLECTOMETER (FWD) LOADINGS

In a flexible pavement design method the subgrade modulus is one of the basic inputs. Within a work dealing with "Long Term Pavement Performance" and development of a "Performance Based Asphalt Strain Criterion" respectively, deflection measurements have been done in a tremendous scale in different seasons and in different parts of Sweden. These measurements have been evaluated in a special study with the aim to establish a data base for subgrade soil moduli. In order to make the evaluation fast and simple a theoretically based algorithm has been developed which calculates the subgrade modulus directly from the deflection 900 mm from the centerline of the load. The algorithm is based on the assumption of a stiff layer at a depth of three (3) metres. (A) For the covering abstract see IRRD 883133.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9054105232
• Corporate Authors:

  AA Balkema

  P.O. Box 1675
  Rotterdam,   Netherlands  BR-3000
• Authors:
  • DJARF, L
• Publication Date: 1996

Language

• English

Media Info

• Pagination: p. 343-5
• Serial:
  • FLEXIBLE PAVEMENTS. PROCEEDINGS OF THE EUROPEAN SYMPOSIUM EUROFLEX 1993 HELD IN LISBON, PORTUGAL, 20-22 SEPTEMBER 1993
  • Publisher: AA Balkema

Subject/Index Terms

• TRT Terms: Coefficients; Conferences; Data banks; Deflection; Deflectographs; Durability; Seasons; Subgrade (Pavements)
• ITRD Terms: 6410: Coefficient; 8525: Conference; 8614: Database; 5586: Deflection; 6187: Deflectograph; 5910: Durability; 2525: Season; 2950: Subgrade
• Subject Areas: Data and Information Technology; Highways;

Filing Info

• Accession Number: 00729627
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 90-5410-523-2
• Files: ITRD
• Created Date: Dec 26 1996 12:00AM