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Stay-cable Bridge Construction Accelerated

The New Bridge over the Ohio River

 Stay-cable Bridge Construction Accelerated
Author(s): ,
Presented at IABSE Symposium: Long Span Bridges, Istanbul, Turkey, 26-28 April 2023, published in , pp. 434-442
DOI: 10.2749/istanbul.2023.0434
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The standard cast-in-place segmental balanced-cantilever construction technique for long-span, cable-stayed bridges has been well known and widely used; however, it can lead to extensive constructi...
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Bibliographic Details

Author(s): (COWI, Prague, Czech Republic)
(COWI, Tallahassee, FL, USA)
Medium: conference paper
Language(s): English
Conference: IABSE Symposium: Long Span Bridges, Istanbul, Turkey, 26-28 April 2023
Published in:
Page(s): 434-442 Total no. of pages: 9
Page(s): 434-442
Total no. of pages: 9
Year: 2023
DOI: 10.2749/istanbul.2023.0434
Abstract:

The standard cast-in-place segmental balanced-cantilever construction technique for long-span, cable-stayed bridges has been well known and widely used; however, it can lead to extensive construction time and places the construction of the pylon on the critical path of the schedule. The Oakley C. Collins Memorial Bridge over the Ohio River (between Ironton, Ohio and Russell, Kentucky, USA) was built with a new construction technique targeting this issue and accelerating construction by implementing several innovative value engineering ideas proposed by COWI, the Contractor’s Construction Engineer. These include the use of back-span falsework, allowing the side span superstructure to be cast-in-place on falsework during pylon construction; the use of precast stay anchor blocks for rapid installation and better geometry control of the stay anchorages; and guide pipes and unidirectional cantilever casting, reducing the casting cycle duration to as little as one segment per week. This paper presents the construction details that significantly reduced the superstructure casting schedule and design modifications to the superstructure.

Keywords:
balanced cantilever cable-stayed segmental value engineering

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