Completed in 2010 by Southland Contracting, the Briar Creek Relief Sewer Phase 1 Tunnel Project consisted of the excavation of approximately 2,423 linear feet of 88-inch rock tunnel using a Tunnel Boring Machine and 429 linear feet of 96-inch liner plate tunnel using hand mine methods. The rock tunnel requires various support types ranging from four flange liner plates to pattern rock bolting. The rock tunnel is being excavated beneath Myers High School buildings so settlement is monitored constantly. The hand mined tunnel was excavated in mix face conditions consisting of rock in the bottom third of the face overlain by running sands. A shield, equipped with shutters and controlled blasting is being used in this tunnel to excavate the tunnel.
Project Details
- Owner: Charlotte-Mecklenburg Utilities District
- Location: Charlotte, North Carolina, United States
- Performed as: Southland Contracting, Inc.
- Project value: $13,292,636.00
- Completion Date: April 2010