United States Air Force Memorial, Arlington, VA
The United States Air Force Memorial consists of three spires arranged in a triangular pattern extending 218 to 270 feet above the ground surface. The spires are triangular in shape and constructed of a stainless steel and reinforced high strength concrete composite. Each spire is supported on an approximate 8 foot thick reinforced concrete pile cap supported on 6 to 10, 3-foot diameter, belled concrete drilled piers.
· Conducted a subsurface exploration and full testing and inspection services during construction.
· Provided design recommendations for belled caisson/drilled pier design and performed a slope stability analysis.
· Testing included earthwork, retaining wall construction, reinforcing steel, concrete placement, structural steel, and stainless steel weld inspections.
Due to the unique nature of the spires, ECS conducted an intensive materials testing and observation program to assist the structural engineer in documenting the in-situ behavior of the memorial materials, including determining the water content of fresh concrete, modulus of elasticity and Poisson's ratio of high strength concrete
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