Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geotechnical Challenges for the South Coast Water District Tunnel Rehabilitation and Sewer Pipeline Replacement Project
The South Coast Water District Sewer Tunnel was constructed in 1954 and contains a 61 cm (24 in) gravity sewer pipeline critical to the District's South Laguna Beach, California, sewer system. Timber supports in the 1.8 m (6 ft) high by 1.8 m (6 ft) wide, 3,192 m (10,474 ft) long tunnel are deteriorated and jeopardize the pipeline that conveys an average of 4.73 million L (1.25 million ga.) of wastewater per day within a highly sensitive coastal environment. Emergency repairs were completed to a 122 m (400 ft) long interval of the tunnel in 2007. Planning and design are underway for the rehabilitation of the balance of the tunnel and replacement of the pipeline. The District is proactively addressing and mitigating geotechnical risks, securing additional easements and access rights, and planning the rehabilitation to ensure continued service during construction. As part of a risk management strategy, the District has implemented an innovative project delivery approach of early contractor involvement coupled with a Target Price contract. This paper will review how lessons learned and an innovative contracting project delivery strategy can be applied to the rehabilitation of aging Rocky Mountain water conveyance tunnels.
Geotechnical Challenges for the South Coast Water District Tunnel Rehabilitation and Sewer Pipeline Replacement Project
The South Coast Water District Sewer Tunnel was constructed in 1954 and contains a 61 cm (24 in) gravity sewer pipeline critical to the District's South Laguna Beach, California, sewer system. Timber supports in the 1.8 m (6 ft) high by 1.8 m (6 ft) wide, 3,192 m (10,474 ft) long tunnel are deteriorated and jeopardize the pipeline that conveys an average of 4.73 million L (1.25 million ga.) of wastewater per day within a highly sensitive coastal environment. Emergency repairs were completed to a 122 m (400 ft) long interval of the tunnel in 2007. Planning and design are underway for the rehabilitation of the balance of the tunnel and replacement of the pipeline. The District is proactively addressing and mitigating geotechnical risks, securing additional easements and access rights, and planning the rehabilitation to ensure continued service during construction. As part of a risk management strategy, the District has implemented an innovative project delivery approach of early contractor involvement coupled with a Target Price contract. This paper will review how lessons learned and an innovative contracting project delivery strategy can be applied to the rehabilitation of aging Rocky Mountain water conveyance tunnels.
Geotechnical Challenges for the South Coast Water District Tunnel Rehabilitation and Sewer Pipeline Replacement Project
Jurich, David (Autor:in) / McDivitt, Joseph (Autor:in) / Lawson, Tim (Autor:in)
Biennial Geotechical Seminar 2012 ; 2012 ; Denver, Colorado, United States
GeoChallenges ; 230-243
09.11.2012
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Landslides , Hazards , Debris , Colorado , Tunnels , California , Rocky Mountains , Geotechnical engineering , Seismic effects , Sewers , Rehabilitation , Soil mechanics , Replacement , Foundations , Pipelines
Rehabilitation of sewer systems Prior geotechnical surveys
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