Clearwater Thermal Grouting
The Job
This thermal grouting project is located near Clearwater, Florida. It involves a 150-linear-foot, 48-inch diameter microtunnel crossing an arterial highway. This microtunnel is one of three on an underground transmission upgrade project. Duke Energy is the owner of the project, which runs through a dense urban area near the St Pete/Clearwater airport.
2.90psi placement pressure while installing the CJTherm thermal grout.
The Challenge
This project was faced with the common thermal grouting challenges:
- minimal water content, but maximum flowability
- strength requirements, but minimal heat of hydration
- high thermal conductivity, but low placement pressure limits
The Solution
CJGeo proposed our CJTherm TM-5 thermal grout mix. This material met all of the project’s strength, flowability, heat of hydration and thermal conductivity. CJGeo mobilized a crew to the site, who performed the grouting in a single day onsite. Continuous temperature & pressure monitoring was done using in-tunnel piezometers, monitored live over the cloud by CJGeo’s engineering team.
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