Performance of Urban Cofferdams Braced with Segmental Steel and Reinforced Concrete Ring Beams

The performance of two urban cofferdams is presented in this paper. The first case history is a cofferdam built for the One Museum Park West structure (OMPW), braced with segmental steel ring beams. The second is a cofferdam braced with cast-in-place reinforced concrete ring beams. The main goal of...

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Bibliographic Details
Published in:Journal of geotechnical and geoenvironmental engineering 2018-04, Vol.144 (4)
Main Authors: Arboleda-Monsalve, Luis G., Uribe-Henao, A. Felipe, Velásquez-Pérez, Alejandro, Zapata-Medina, David G., Sarabia, Fernando
Format: Article
Language:English
Subjects:
Cantilever beams
Cantilevers
Cofferdams
Concrete curing
Deformation effects
Deformation mechanisms
Dredging
Excavation
Ground motion
Low temperature
Museums
Reinforced concrete
Reinforcement (structures)
Reinforcing steels
Sheet piles
Steel
Time dependence
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Summary:The performance of two urban cofferdams is presented in this paper. The first case history is a cofferdam built for the One Museum Park West structure (OMPW), braced with segmental steel ring beams. The second is a cofferdam braced with cast-in-place reinforced concrete ring beams. The main goal of this paper is to study the excavation-induced ground deformations arising from these two cofferdams built in similar geologic settings but different bracing systems, installation sequences, and material responses to time-dependent effects. The deformations at the OMPW cofferdam are attributed to the compliance in the overall retaining system caused by a large initial unsupported cantilever depth and gaps left open between segmental steel ring beams and sheet piles. For the cofferdam at Site 2, observed ground movements are attributed to a rapid construction sequence, low temperatures during concrete curing, and concrete material time-dependent behavior of the concrete ring beams.
ISSN:1090-0241
1943-5606
DOI:10.1061/(ASCE)GT.1943-5606.0001864