Boston artery likely first U.S. tunnel jacking
Article Abstract:
The Central Artery Project in Boston, MA, aims to reduce construction time by one year and save $60 million in construction costs. The project involves the use of full-scale highway tunnel jacking which will simplify the construction of six tunnels that will form part of the interchangeof Interstates 90 and 93. The Federal Highway Administration (FHWA) has funded the project which is presently being reviewed by the Massachusetts Bay Tansit Authority, FHWA and Amtrak. The diverse soil conditions and the soil-grouting tests for soil stabilization pose challenges for the designers and engineers.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1993
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Norway's Olympic cavern
Article Abstract:
The world's largest man-made rock cavern constructed for public use can be found beneath a hillside in Norway. This cavern, which would be housing an ice hockey rink, was built in hard rock using the Norweigian method of tunneling (NMT) instead of the new Austrian tunneling method. The contrasts between the two methods are presented as the feasibility of NMT is ascertained by the comparison. The Q-system rock mass classification method was used to obtain and derive the geotechnical parametersneeded to predict the behaviour of the rock mass and to estimate and document rock support.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1992
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Tunneling under pressure
Article Abstract:
Engineers working on the South Bay Ocean Outfall project in San Diego, CA, are faced with problems concerning tunnel pressure due to effluents and external groundwater. Geological conditions and stresses also necessitate the use of closed-face, fully shielded earth-pressure balance machine for tunneling. Cutterheads will have to be designed to resist wear due to contact with abrasive materials. The tunnel liner consists of precast concrete and continuous hoop steel to withstand pressure and displacement at fault crossings.
Publication Name: Civil Engineering
Subject: Science and technology
ISSN: 0885-7024
Year: 1996
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