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Author(s):     
 
Anagnostou, Georg; Schuerch, Roberto; Perazzelli, Paolo
 
Title:     
 
Lake Mead Intake No 3 Tunnel - Design considerations and construction experience
 
Abstract:     
 
This paper presents the pre-construction evaluation of the ground for the Lake Mead Intake No 3 Tunnel and the experience gained from the project, which had the aim of maintaining water supplies for the Las Vegas greater metropolitan area. The construction of this tunnel using a dual-mode slurry shield represents a major engineering achievement, which pushed back the boundaries of closed shield tunnelling: Overcoming an extended fault zone under high hydrostatic pressure in the metamorphic rocks and mucking-out difficulties associated with high rates of water inflow in the sedimentary rocks necessitated closed-mode operation over about 2 km at unprecedentedly high face pressures of up to 14 bar.
 
Source:     Geomechanics and Tunnelling 11 (2018), No. 1
 
Page/s:     15-23
 
Language of Publication:     English/German



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