PROJECT DETAILS
Crossland Heavy Contractors won a City of Tulsa contract to upgrade and replace a lift station at Newblock Park located near downtown Tulsa, OK. The new lift station was to be built within feet of the existing lift station. The existing structure had to remain in service during construction. Due to the close proximity and amount of overburden, a sheeting and shoring system was installed for the excavation portion. After removing over 20ft of soft overburden Crossland Heavy encountered hard rock. An excavator with a hoe ram was brought in to take on the rock. This method was unsuccessful so Crossland reached out to Dykon Blasting for help. Dykon’s team assured the Contractor and the City that they could safely drill and blast the rock inside the sheet pile system with no damage to the sheeting or the existing lift station. Dykon line drilled the perimeter of the excavation 18 inches away from the whalers in order to leave a smooth wall after the blasting and excavation was complete. Dykon’s plan called for the rock blasting to take place in two lifts in order to mitigate vibration to the adjacent structures. After each lift was drilled Dykon’s blasting crew loaded and matted each shot. Seismographs were then deployed around the site to measure the ground vibrations from each blast. The project was a success providing easy digging of the blasted rock for the contractor and leaving the surrounding structures unhurt by the blasting operations.
