Case Study
Parking Garage Structural Repair
Location Appalachian Mountain Resort
Forensic Engineer SGH
General Contractor Structural, Inc.
Project overview
Comprehensive structural repair of a 5 over 2 podium structure, 2-level, 90-stall, subterranean parking structure, containing 60 occupied luxury Type V condominiums atop the podium deck. Forensic GPR investigation determined an absence of critical reinforcement within the suspended slab(s), resulting in near failure deflection and an immediate “shore or evacuate” engineering mandate.
Forensic analysis identifying the absence of critical reinforcement within the suspended slab and the resulting deflection.
Project Goals
Global installation of a dense, 6’x 6’ shoring pattern mirrored to foundation to support the structure through mitigation completion. The engineering and construction teams designed an under-slab-installed over 125 Cast in Place (CIP) concrete beams along with global column augmentation and reinforcement to adequately correct the structural live load support shortfall.
18 Foundation & Column “Enlargements”
Primary support columns comprehensively augmented from footing to drop panel slab.
Overhead Demo and Prep & Supplements Beam-Column Connection
Suspended drop panel slabs demoed overhead to receive the new support beam installations.
New beam full cage reinforcement ahead of final beam forming
125 beam reinforcement cages, each anchored and fully assembled to the underside of the suspended slab(s).
Through Bars at Column Head
Backbone through column reinforcement installation to receive the new support beams
Mechanical Anchoring & Reinforcement Cage
New steel beam reinforcement, pattern anchored to the underside of the suspended slab.
Meticulous pre-pour quality control, conducted on each SCC batch. 185 cyd’s of SCC pumped into the maze of forms to complete the final beam additions.
J-Ring Test Self Consolidated Concrete (SCC) to final beam pour
Finished Product
The project was completed in 13 months and won an Excellence in Concrete Construction award from the American Institute of Concrete. The project scope was meticulously designed to integrate with existing non-damaged structural elements and to allow uninterrupted unit occupancy during the repair. Real time engineering quality control, thorough documentation and cost analysis, provided a successful causation foundation resulting in full claim reimbursement award to the Developer.
