HOW TO PUT A SMOOTH-RIDING FINISH ON A WIDE BRIDGE DECK

IN ORDER TO PUT A SMOOTH-RIDING CONCRETE FINISH ON A 100 FT WIDE BRIDGE DECK /THE PIERCE VIADUCT IN HOUSTON, TEXAS/, IT IS FINISHED IN HALF WIDTHS WITH A FRAME-SUSPENDED FLOAT /LONGITUDINAL BULLFLOAT/ WHICH OSCILLATES AS IT MOVES TRANSVERSELY. THE FINISHING MACHINES FRAME WITH GROOVED WHEELS WAS MOUNTED ON PIPE RAILS SET ON ADJUSTABLE RISERS, ONE ALONG THE CENTERLINE AND ONE ALONG THE CANTILEVERED OUTER EDGE. RISERS WERE ADJUSTED BY SLEEVE BOLT AND LOCK NUTS. THE ENTIRE UNIT WAS PROPELLED FORWARD BY ELECTRIC MOTORS, ONE AT EACH END. THE SUSPENDED BULLFLOAT UNIT TRAVELED ALONG UNDER THE FRAME BY A PUSHBUTTON CONTROLLER CHAIN AND SPROCKET UNIT. THE 10 FT LONG OSCILLATION OF THE FLOAT WAS CENTRALLY CONTROLLED BY ONE OPERATOR. THE CONCRETE WAS MIXED AT GROUND LEVEL AND WAS COMPACTED BY MECHANICAL VIBRATORS IN THE DECK. THE FORMS WERE DESIGNED TO ELIMINATE ALL FALSE-WORK AND EXPEDITE SETTING, REMOVING AND HANDLING. SMALL SCREW JACKS RESTED ON TIMBERS WEDGED BETWEEN THE BOTTOM BEAM FLANGE AND PERMITTED QUICK AND SENSITIVE FINAL- POSITIONING OF THE FORMS BETWEEN BEAM LINES.

  • Supplemental Notes:
    • Vol 18, No 6, PP 23-25, 1 FIG, 4 PHOT
  • Publication Date: 1965-6

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  • Accession Number: 00214708
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jul 29 2004 5:49PM