MEASUREMENT OF EARTH PRESSURES IN PULVERIZED FUEL ASH BEHIND A RIGID RETAINING WALL

THE PAPER DESCRIBES AN INVESTIGATION TO MEASURE THE EARTH PRESSURE DEVELOPED WITHIN A PULVERIZED FUEL ASH FILLING BEHIND A RETAINING WALL 11 M HIGH, 13 M LONG AND RESTRAINED AT THE ENDS. PRESSURE CELLS AND THERMOCOUPLES WERE INSTALLED AT FOUR LEVELS IN THE FILL AND MEASUREMENTS MADE OF WALL MOVEMENT. DURING PLACING OF THE INITIAL 3 M OF FILLING ABOVE EACH CELL, HIGH LATERAL PRESSURES WERE INDUCED APPARENTLY BY THE COMPACTION PROCESS. OVER A 3 YEAR PERIOD THE MEASURED LATERAL PRESSURES OSCILLATED SEASONALLY, AN EFFECT WHICH SEEMS TO BE RELATED TO THE CHANGES IN TEMPERATURE WITHIN THE FILL, WITH AN OVERALL TREND FOR PRESSURES TO INCREASE. THE PRESSURES WERE GENERALLY GREATER THAN THOSE ASSUMED IN THE DESIGN. LABORATORY TESTS SHOWED THAT THE ASH POSSESSED APPRECIABLE SELF-HARDENING PROPERTIES. THE RETAINING WALL WAS MASSIVE IN CONSTRUCTION: WALL MOVEMENTS WERE VERY SMALL, PROBABLY INSUFFICIENT TO PERMIT ANY APPRECIABLE RELAXATION OF THE LATERAL PRESSURES. /TRRL/

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 569-75

Subject/Index Terms

Filing Info

  • Accession Number: 00230360
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: TRIS
  • Created Date: Jul 31 1974 12:00AM