Design of the Brightwater Conveyance Tunnels
Abstract
The Brightwater conveyance system includes 26 km of tunnels, a 130 mgd pump station, 2 km of microtunnels, and a 2.4 km outfall. The tunnels extend from Woodinville to Puget Sound through varying soils in 1 to 7 bars of hydrostatic pressure and depths to 185 m. The tunnel diameters range from 4 to 6 m and include numerous lining systems. This paper highlights major shaft and tunnel design, including dual cell shafts, multiple pipe configuration tunnels, polymer concrete segments, and the use of a one pass lining designed to convey high pressure effluent.
2005
Rapid Excavation Tunneling Conference (RETC) Proceedings
Daniel N. Adams
Jacobs Associates
Jeremy Johnson
Jacobs Associates
Leon Maday
Metropolitan King County, Seattle
Dan L. Pecha
HDR Engineering, Inc.
