Featured Projects
You are here
Inter-Quarry Tunnel
| Owner: | |||||
| Client: | |||||
| Service: | Design and On-Site inspection services
|
||||
| Estimated cost: | Commencement: | March 29, 1994
|
Completion date: | December 29, 1994
|
|
| Location: | Leesburg, VA United States |
||||
| Technical data: | Haulage tunnel with approx. 80 ft (24 m) of overburden to connect new and old quarries separated by a VA Park Authority trail. Applying NATM principles, the tunnel was mined using drill and blast, lined with steel fiber reinforced shotcrete. Length: 285 ft (87 m), Width/Height: 34 ft (10 m)/27 ft (8 m), Section: 814 sqft (76 m²), Excavation Method: Drill and Blast. |
||||
| Geology description: | Relatively competent rock mass with diorite as the base rock allowing 10 ft ( 3 m) rounds for the top heading and bench excavation. Due to previous blasting the rock at the Portals was severely fractured. |
||||
| Categories: | |||||
| Bid cost: | Final cost: | $600,000
|
|||
| Service areas: | |||||
