A contractor had been tasked with setting a new manhole inlet tying into an existing 60-inch storm drain, which would ultimately help regulate stormwater for toll roads. The excavation would require a 12-ft square excavation to a depth of 16-ft in what the contractor had classified as Type C-60 soil. The excavation site would be within six to eight feet from an active interstate, which per local DOT regulations would require active shoring due to the need to prevent undermining the existing roadway.  In addition to needing a positive shoring system, the contractor would also need a system that could accommodate the incoming lines that would need to be tied into.

The contractor contacted NTS to discuss the project and discuss potential shoring options for the job.  After reviewing a few options, the contractor elected to use a slide rail system with two sheeting guide frames.  The slide rail system is installed in a dig and push manner ahead of the excavator’s cut to prevent soil raveling back into the site. The sheeting guides can be inserted along open ends where a line needs to cross the shoring system, in this case, 60-inch reinforced concrete pipe.  Sheets are then inserted around the crossing utility in conjunction with the manufacturer’s tabulated data and or engineered plan.  The system performed very well and allowed the contractor to quickly complete the project.