Project Challenge:
Klein and Hoffman faced multi-faceted challenges while providing
cost effective and aesthetic modifications and additions to
this existing water treatment plant. Challenges included: foundation
systems that could accommodate varying geologic features and
high groundwater conditions along the banks of the Mississippi
River; support of a 7-foot-diameter by 55-foot-long liquid CO2
storage tank on top of existing roof framing designed for much
lighter loads; and a column-free building for two 39-foot-tall
by 60-foot-diameter hydraulic cone type (HCT) solids contact
units.
Project Solution:
Foundations utilized reinforced concrete mats and drilled pile
foundations as well as 1.75 inch diameter rock anchors to resist
hydrostatic uplift.
The liquid CO2 tanks were supported by vertical and horizontal
steel trusses that spanned over the existing roof system and
existing steel columns reinforced by jacketing with reinforced
concrete.
Economic design of the HCT building was accomplished by the
use of a simplified framing system that consisted of precast
planks and deep beams moment connected to 24-inch-deep columns
for lateral stability.
OWNER: City of Moline Department of
Public Utilities
CLIENT: Greeley and Hansen, LLC
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