Miami Thermal Grouting
The Job
This thermal grouting project is located in Miami, Florida. It involves a 198-linear-foot, 48-inch diameter microtunnel crossing the MacArthur Causeway at Terminal Island. The site sits between Fisher Island, Star Island, and the USCG Miami Base. The owner of the infrastructure is Florida Power & Light. The microtunneled crossing supports electrical transmission upgrades serving South Beach.
Placing the thermal grout.
The Challenge
The microtunnel housed a complex bundle of conduits. Specifically, it contained six 6-inch conduits, six 2-inch conduits, and two 12-inch conduits. The project required 74 cubic yards of specialized thermal grout to fill the annular space. Filling this area efficiently without delays was the primary requirement.
The Solution
CJGeo generated and placed the necessary thermal grout in a single shift. Our crew utilized our CJTherm TM-5 thermal grout mix to complete the backfill process. The material featured a wet rho of 46 and an average dry rho of 61. Onsite generation allowed CJGeo to ensure continuous placement around the conduit bundle inside the 48-inch microtunnel.
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