Authors: A. Lowson w/ client D. Tempelis, Metropolitan Water District of Southern California
Proceedings - Rapid Excavation and Tunneling Conference 2003; Pgs: 668-687; United States
Abstract
The Riverside Badlands Tunnel segment of the Metropolitan Water District of Southern California's Inland Feeder Project, was lined with a segmented concrete primary lining and a welded steel final lining with the annulus filled with Low-Density Cellular Concrete (really a grout). The paper describes a numerical modeling technique that was developed to determine safe grout placement procedures to avoid pipe flotation, and shows the relationship between flotation and the rheology of the liquid grout. Design details of the steel liners are often not well suited to grout placement, and recommendations are given on how to improve this.
