Former Ashland Site
Greensboro, North Carolina
The consulting engineer on this project specified a very complicated process to insure that there was no damage to the buildings. Lang Tool Co. proposed an alternate process with a reduction in the cost. Instead of trying to mix straight down from the building footings the alternate called for mixing to the zone of influence that had been established by the engineer 1’ out from the footing and entering the zone of influence 3’ out from the building and 7.25’ below the building footing. Additionally, the alternate called for a higher cement/soil ratio in the cells adjacent to the building and that the cells be mixed in a skip pattern to further reduce the chances of any damage to the building foundation. Lang Tool Co.’s alternate was excepted and work was accomplished as described in the LTC work plan.
The site was hard dry clay soil that generated a significant amount of swell.