Title: Concrete Q&A: Concrete Placement for Ogee Dam and Tie Spacing Tolerances

Author(s):

Publication: Concrete International

Volume: 42

Issue: 6

Appears on pages(s): 59-60

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DOI:

Date: 6/1/2020

Abstract:
My company has a new project that includes a 10 ft (3 m) tall dam crest wall. In section, one side of the wall is a vertical line and the other side is an ogee curve, so the wall is 2 ft (0.6 m) wide at the top and 12 ft (3.7 m) wide at the bottom. The wall will be formed using a steel gang form in conjunction with a plywood insert to create the ogee shape. We need to avoid honeycombing, and we are concerned that the ogee shape will make it impossible to place internal vibrators near the form face. External vibrators seem like a good alternative, but we have no experience with them. Can you provide any information on the use of this equipment as well as positive and negative experiences?