Title:
I-90 First Hill Lid
Author(s):
Lawrence A. Kyle
Publication:
Concrete International
Volume:
11
Issue:
2
Appears on pages(s):
30-36
Keywords:
concrete construction; earthquake-resistant structures; loads (forces); precast concrete; prestressed concrete; reinforced concrete; structural design; tunnels; vehicular tunnels; Design
DOI:
Date:
2/1/1989
Abstract:
Design and construction sequencing of a 2800 ft (853 m) long cut-and-cover tunnel on the west end of Mercer Island, Washington, is discussed. Structural elements in the First Hill Lid include walls, girders, and slabs; operating systems include ventilation, traffic surveillance and control, illumination, fire protection and control, and driver information systems; landscaping includes bike paths, a park, and recreation areas on top of the lid.