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https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

PNEUMATIC--TIRED ROLLERS IN ROAD CONSTRUCTION

THE PROBLEM OF COMPACTING CARRIAGEWAY LAYERS WITH PNEUMATIC-TIRED ROLLERS IS USUALLY STUDIED BY MEANS OF EMPIRICAL METHODS. THE AUTHOR ATTEMPTS TO LOOK AT THIS PROBLEM IN A RATIONAL WAY, STARTING FROM KNOWN THEORIES AND EXPERIMENTAL RESULTS CONCERNING THE BEHAVIOUR OF SOIL UNDER STATIC LOADS. THE BEHAVIOUR OF SOIL UNDER LOADS APPLIED BY A COMPACTOR IS ANALYSED BY THE MOHR METHOD TO EXPRESS STRESSES, AND BY INTRINSIC STRAIGHT LINES TO EXPRESS SOIL CHARACTERISTICS. THE STUDY OF THE EQUILIBRIUM OF THE SOIL UNDER LOAD SHOWS THAT THE EQUILIBRIUM IS REACHED WHEN LIMIT CONDITIONS ARE EQUAL TO MAXIMA STRESS VALUES, THEREFORE WHEN THE INTRINSIC STRAIGHT LINE WHICH REPRESENTS SOIL CONDITIONS IS TANGENTIAL TO THE ENVELOPE OF THE MOHR CIRCLES REPRESENTING THE STRESSES CREATED BY THE COMPACTOR. THE SHAPE OF THIS ENVELOPE DEPENDS ON THE CONTACT PRESSURE, AND ON THE SHAPE AND DIMENSION OF THE CONTACT AREA. BY THE USE OF NOMOGRAPHS, IT IS POSSIBLE TO ANALYZE THE INFLUENCE OF LOAD VARIATIONS ON EACH WHEEL AND THE EFFECT OF TYRE PRESSURE ON THE DENSITY REACHED AT VARIOUS DEPTHS. THE MAXIMUM COMPACTABLE DEPTH FOR A PRESCRIBED MINIMUM DENSITY CAN BE EVALUATED TOGETHER WITH THE MAXIMUM ACCESSIBLE DENSITY FOR A GIVEN LOAD. /L.C.P.C./R.R.L./

  • Supplemental Notes:
    • No 19, pp 3-1-3-16, 19 FIG, 2 PHOT
  • Authors:
    • Simon, J
  • Publication Date: 1966-5

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  • Accession Number: 00219303
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 7 1994 12:00AM