Reinforced cocnrete diaphragm walls or slurry walls provide rigid support for excavations. Recent projects have used slurry walls and prefounded columns constructed using slurry techiques to allow the superstructure to go up while excavation goes down. As the excavation proceeds, the slurry (bentonite) is pumped into the trench to keep it full; as the concrete for the wall is placed, the slurry is pumped out and saved. As the concrete rises in the panel, the head in the tremie pipe diminishes, slowing down the placement process, and the tremie is pulled up to maintain the desirable amount of penetration of the pipe into the concrete. It is essential that the initial rate of concrete flow through the tremie be high enough to flush deposits from the bottom of the panel. The advantages of delivering concrete to the tremie hopper using a pump mounted on a boom truck rather than dumping concrete directly into the tremie from a ready-mixed truck are pointed out.

Media Info

  • Pagination: p. 34
  • Serial:
    • Concrete International
    • Volume: 11
    • Issue Number: 10
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00488926
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 31 1989 12:00AM