IMPROVED SUBGRADE - LOGICAL TECHNICAL DEVELOPMENT OR JUST A CLEVER WORD

LA COUCHE DE FORME - DEVELOPPEMENT LOGIQUE DE LA TECHNIQUE DU ARTIFICE DE LANGAGE

The author recalls that the role of the improved subgrade is to ensure the transition between earthworks and pavement. This transition role can be envisaged from different viewpoints which are briefly analyzed: transition between earthworks contract and pavement contract; transition between construction techniques used for earthworks and pavement; transition in time; transition between the average quality of the materials used in earthworks and pavement (quality which is very difficult to forecast); transition as regards the statistical dispersion of the quality of the quality of the materials; and transition between materials widely differing in price. The very idea of "improved subgrade" is ambiguous in itself. Depending on the point of view adopted (point of view of the pavement design or that of the execution of the works) the roles of the subgrade can appear very contradictory. Because of the necessary increase in the quality of the successive pavement layers (average performance of materials, allowance for execution of the work), it is always better to err on the side of great thickness/fairly low quality at the level of the improved subgrade to ensure the quality of the completed pavement. /TRRL/

• Corporate Authors:

  Laboratoire Central des Ponts et Chausees (LCPC)

  Boulevard Lefebvre 58
  Paris Cedex 15,   France  F-75732
• Publication Date: 1973-3-4

Language

• French

Media Info

• Features: Photos;
• Pagination: p. 57-62
• Serial:
  • Bulletin de Liaison des Lab des Ponts et Chaussees
  • Issue Number: 64
  • Publisher: Laboratoire Central des Ponts et Chausees (LCPC)

Subject/Index Terms

• TRT Terms: Construction management; Contracts; Earthwork; Materials; Pavement subgrade; Pavements; Quality control; Thickness
• Uncontrolled Terms: Pavement thickness; Quality; Use
• Old TRIS Terms: Dispersion
• ITRD Terms: 146: Contract; 3653: Earthworks; 2955: Pavement; 2950: Subgrade; 5933: Thickness; 8584: Web site
• Subject Areas: Administration and Management; Construction; Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I51: Earthworks and Soil Drainage; I52: Construction of Pavements and Surfacings;

Filing Info

• Accession Number: 00125315
• Record Type: Publication
• Source Agency: Laboratoire Central des Ponts et Chausees (LCPC)
• Files: ITRD, TRIS
• Created Date: Dec 3 1975 12:00AM