COMPACTION OF BACKFILL EMBANKMENTS OF ONE BRANCH OF THE SEINE BY MEANS OF INTENSIVE TAMPING

COMPACTAGE PAR PILONNAGE INTENSIF DE REMBLAIS DE COMBLEMENT D'UN BRAS DE SEINE

THE AUTHOR PRESENTS THE MEASUREMENTS MADE DURING THE COMPACTION OF BACKFILL EMBANKMENTS OF A BRANCH OF THE SEINE. THE FILL MATERIAL WAS A FINE SAND POURED TO A HEIGHT OF 7 M OVER FINE COMPRESSIBLE ALLUVIUM. THE TESTS AND MEASUREMENTS CARRIED OUT WERE AS FOLLOWS: FORECASTING THE BEHAVIOUR OF THE EMBANKMENT BY MEANS OF LABORATORY TESTS (CYCLIC OEDOMETER WITH SINUSOIDAL LOADING AND DYNAMIC IMPACT OEDOMETER); FOLLOW-UP STUDY OF THE EVOLUTION IN PORE WATER PRESSURE DURING AND BETWEEN TAMPING STAGES; SIMULTANEOUS CONTROL OF SETTLEMENT AND VARIATIONS IN BULK DENSITY WITH THE EXPERIMENTAL GAMMA-GAMMA PROBE AND WITH MEASUREMENTS OF SURFACE MOVEMENTS; STUDY OF THE IMPROVEMENT IN THE MECHANICAL CHARACTERISTICS OF THE SOIL BY PRESSIOMETER AND PENETROMETER TESTS. IN VIEW OF THE URBAN ENVIRONMENT, THIS PROGRAMME WAS SUPPLEMENTED BY VIBRATION MEASUREMENTS IN AND OBSERVATIONS OF THE MOVEMENTS OF A RETAINING WALL. RESULTS EMPHASIZE THE EFFICIENCY OF THE COMPACTION METHOD, MAXIMUM DENSITY BEING OBTAINED AT APPROXIMATELY 5 TO 6 M IN DEPTH. ON THE OTHER HAND NO MARKED IMPROVEMENT IN MECHANICAL CHARACTERISTICS WAS OBSERVED IN THE UNDERLYING ALLUVIUM.

Language

  • French

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Filing Info

  • Accession Number: 01297246
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:16AM