W.E. O'Neil's Innovative Approach to Deep Excavation (Chicago)
W.E. O’Neil is currently completing foundation work at the Belmont Village Senior Living project in Lincoln Park, a process involving 30 feet of excavation below street level and within a few feet of several residential structures.
The City of Chicago allows a maximum of 1/4-inch of earth movement with steel sheeting installed, but with such a deep excavation, standard sheeting methods would not have prevented disruption to adjacent buildings, streets and sidewalks.
W.E. O’Neil’s solution to protect these structures included:
- Underpinning the adjacent buildings
- Temporarily bracing the sheeting with two-foot thick walers
- Installing vibration monitors
- Utilizing the heaviest steel sheeting on the market
This innovative approach keeps our Lincoln Park neighbors and pedestrians safe and makes way for vertical construction at the Belmont Village project.