VARIATIONS IN STIFFNESS OF SOILS AND CONSTRUCTION MATERIAL LAYERS UNDER NATURAL ENVIRONMENTAL AND LOADING CONDITIONS AND THEIR SIGNIFICANCE FOR THE DESIGN OF FLEXIBLE ROAD PAVEMENTS

DIE STEIFIGKEITSAENDERUNGEN DER BOEDEN UND SCHICHTBAUSTOFFE UNTER NATUERLICHEN UMWELT- UND BELASTUNGSBEDINGUNGEN UND IHRE BEDEUTUNG FUER DIE BEMESSUNG FLEXIBLER STRASSENBEFESTIGUNGEN

THEORETICAL DESIGN TECHNIQUES SUFFER FROM THE UNRELIABILITY OF VALUES FOR ELASTIC MODULUS AND LATERAL DEFORMATION MODULUS USED IN THE CALCULATIONS. HITHERTO, ADOPTED DATA HAVE BEEN REPRESENTATIVE OF THE DEFORMATION CHARACTERISTICS IN THE PLACING PHASE. CHANGES TAKE PLACE DURING THE CONSOLIDATION PHASE, THE STEADY STATE AND FATIGUE PHASE. IN A SYSTEMATIC ANALYSIS, THE SERVICE BEHAVIOUR OF FLEXIBLE PAVEMENTS WAS INVESTIGATED AND TESTED, IN ORDER TO QUANTIFY THESE CHANGES WITH TIME. THIS INCLUDED CONVERTING INTO CONSTANT E-MODULI FOR EACH LAYER THE RESULTS OF STANDARD VERTICAL PLATE BEARING TESTS CARRIED OUT ONE ABOVE THE OTHER AND COMPARABLE MEASUREMENTS USING A COMPUTING METHOD DEVELOPED AT THE TECHNICAL UNIVERSITY OF HANOVER. THE EFFECTS ON THE DEFORMATION CHARACTERISTICS OF THE SOIL AND ROAD COURSE MATERIALS DUE TO HYDRAULIC CONDITIONS, TRAFFIC, GRADING, COURSE THICKNESS AND STIFFNESS ARE DISCUSSED AND LEAD TO A NEW APPRAISAL OF SUB-SURFACE STIFFNESS, OF GROUND IMPROVEMENT WITH LIME, AND OF ROAD COURSE THICKNESS AND E-VALUES.

Language

  • German

Media Info

  • Pagination: 374-81
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 01303475
  • Record Type: Publication
  • Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
  • Files: ITRD
  • Created Date: Nov 21 2010 9:04AM