Design Challenges of the San Bernardino Mountains Tunnels along the Inland Feeder
Abstract
The design of two water supply tunnels through the San Bernardino Mountains in Southern California involved several unusual design considerations. Construction of these tunnels will involve tunneling through active faults, a portal excavation located in a geothermal field, pre-excavation grouting to minimize the effects of tunnel excavation on the groundwater regime, and pressure tunnel design for low in situ stress - and high rock mass permeability conditions.
1996
North American Tunneling (NAT) Conference Proceedings
Jim Gallanes
Metropolitan Water District of Southern California
Peter Lukins
Jacobs Associates
Victor Romero
Jacobs Associates
