The Job
This Texas pipe abandonment project was located on US-77 south of Corpus Christi, Texas. A general contractor working on a highway upgrade had to replace a gas pipeline crossing the existing highway. The design called for the new line to be installed deeper than the original infrastructure. Once the new line was active, the project specifications required the contractor to abandon the existing line in place with grout.
CJGeo Crew uses CJFill-Ultra Lightweight cellular grout to abandon a pipeline under a highway.
The Challenge
The existing line was 30 inches in diameter and 713 linear feet long. Traffic constraints meant there was no access to the line in the middle of the road. This meant the contractor needed a grout capable of pumping more than 700 linear feet from one end. Traditional flowable fill often separates or requires excessive pump pressure to travel such distances without intermediate injection points.
The Solution
The contractor reached out to CJGeo for a solution. CJGeo proposed 25lb/cuft CJFill-Ultra Lightweight cellular grout for the project. This material can easily be pumped thousands of feet at a time without segregating or requiring high pressures. CJGeo mobilized a wet batch crew to the site to perform the installation. The crew filled the pipe completely in fewer than two hours of grouting. Uniform grout vented from the far end of the pipe, confirming complete fill of the abandonment.
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