Please wait a minute...
Submit  |   Chinese  | 
 
Advanced Search
   Home  |  Online Now  |  Current Issue  |  Focus  |  Archive  |  For Authors  |  Journal Information   Open Access  
Submit  |   Chinese  | 
Engineering    2017, Vol. 3 Issue (6) : 880 -887     https://doi.org/10.1016/j.eng.2017.11.007
Research |
Lake Mead Intake No. 3
Jon Hurt1(),Claudio Cimiotti2
1. Arup Group Limited, New York, NY 10005, USA
2. S.A. Healy Company, Salini Impregilo Group, Las Vegas, NV 89074, USA
Abstract
Abstract  

As a result of a sustained drought in the Southwestern United States, and in order to maintain existing water capacity in the Las Vegas Valley, the Southern Nevada Water Authority constructed a new deepwater intake (Intake No. 3) located in Lake Mead. The project included a 185 m deep shaft, 4.7 km tunnel under very difficult geological conditions, and marine works for a submerged intake. This paper presents the experience that was gained during the design and construction and the innovative solutions that were developed to handle the difficult conditions that were encountered during tunneling with a dualmode slurry tunnel-boring machine (TBM) in up to 15 bar (1 bar= 105 Pa) pressure. Specific attention is given to the main challenges that were overcome during the TBM excavation, which included the mode of operation, face support pressures, pre-excavation grouting, and maintenance; to the construction of the intake, which involved deep underwater shaft excavation with blasting using shaped charges; to the construction of the innovative over 1200 t concrete-and-steel intake structure; to the placement of the intake structure in the underwater shaft; and to the docking and connection to an intake tunnel excavated by hybrid TBM.

Keywords Sub-aqueous tunneling      Tunnel-boring machine excavation      Water intakes     
Fund: 
Corresponding Authors: Jon Hurt   
Just Accepted Date: 01 December 2017   Issue Date: 02 March 2018
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
Jon Hurt
Claudio Cimiotti
Cite this article:   
Jon Hurt,Claudio Cimiotti. Lake Mead Intake No. 3[J]. Engineering, 2017, 3(6): 880 -887 .
URL:  
http://engineering.org.cn/EN/10.1016/j.eng.2017.11.007     OR     http://engineering.org.cn/EN/Y2017/V3/I6/880
References
Related
No related articles found!
Copyright © 2015 Higher Education Press & Engineering Sciences Press, All Rights Reserved.
京ICP备11030251号-2

 Engineering