Mississippi Gas Main Abandonment
The Job
A natural gas provider in rural Mississippi needed to abandon three parallel pipelines. Erosion at a creek crossing had exposed the pipes. This made the lines vulnerable to damage. The owner decided to install new gas lines via horizontal directional drilling (HDD) at a greater depth. The old steel pipes required abandonment to prevent future issues. CJGeo provided the grouting to fill and secure the pipelines.
Installing the CJFill-Ultra Lightweight cellular grout.
The Challenge
The three parallel gas mains ran for approximately 2,200 linear feet each. The client wanted to fill the pipes with a low-density cellular concrete. This would secure them in place and prevent any future collapse or groundwater movement. The pipes’ elevated sections at the creek crossing were cut and removed. We needed to fill the remaining segments. The primary challenge was pumping the cellular concrete over the long distance. We also had to work with the natural gas provider’s strict site regulations.
The Solution
CJGeo used a wet batch cellular grout generation system for this remote project. Due to site access issues and being multiple miles from the nearest paved road, we used a local ready-mix provider to create the slurry. Our team filled the three pipes from a single location, pumping the cellular concrete over the long distance.
The pipes were filled one at a time, and the entire project took two days to complete. The low-density cellular concrete provided the ideal solution because it is lightweight and has excellent flow characteristics. The peak pumping pressure while running around 75 cubic yards per hour was less than 30psi.
Speak With An Expert
Have a project similar to this Mississippi gas main abandonment project? Reach out to one of our experts today to see how CJGeo’s innovative solutions can help.
