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Chemical Grout: Commercial Medical Building, Tampa, FL

by | May 18, 2020

The project is a single-story, metal frame, office building with stucco cover, interior steel pipe column supports, and post tension cable reinforced slab. The building has undergone significant subsidence due to organic soil layers. The Geotechnical Engineer of Record recommended a ground improvement solution of two-part structural polyurethane foam injections (chemical grout) throughout the structure to improve the load bearing capacity of the existing soils at the site.

Challenge

• Subsoil conditions varied from dense to very loose.

• All grout injection points were located inside the structure.

Solution

Helicon worked alongside the geotechnical design team to develop a chemical grout design submittal. The chemical grout program was designed to meet the building code load criteria. Chemical grout utilized in this project has a compressive strength of approximately 11,000 psf as an unconfined foam. Efficient planning & coordination was key to overcoming the challenges & limitations. 31,565.5 +/- pounds of polyurethane material were injected into a total of 635 chemical grout points throughout the interior of the structure. Helicon collaborated with the Geotechnical Engineer of Record throughout the work and confirmed all recommended criteria were followed. The chemical grout work was successfully completed on time and within budget.

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About the Author:

Jay Silver

Jay Silver is the Founder and President of Helicon, Florida’s leading geotechnical construction company specializing in foundation repair, soil stabilization, deep foundations, and underpinning solutions.

Under his leadership, Helicon has become one of Florida’s top foundation repair providers and a trusted partner for homeowners, builders, and contractors across the state. Jay is recognized as an expert in geotechnical construction and is active in professional organizations advancing the industry.