Speakers

Eric Zimmermann

Matthew Lengyel earned his BSCE from the Citadel and MSCE from Kansas State University, and is currently a Project Director at Figg Bridge Engineers, Inc. He has gained extensive experience primarily in the design and construction of large bridges, which includes segmental concrete bridge projects like the Allegheny River Bridge in Pittsburgh, Pennsylvania and the I-35W Saint Anthony’s Falls Bridge in Minneapolis, Minnesota, and he is currently working on the new Harbor Bridge Project in Corpus Christi, Texas.

Presentation Description

During the latter half of the twentieth century, the technological evolution of segmental concrete bridges greatly expanded the capabilities and use of concrete in bridge design and construction. Long span lengths over 300 feet long were at one time considered unachievable with concrete superstructures; however, that span length and much longer spans are now very achievable and extremely competitive when compared to their alternate long span steel superstructures. This presentation will first compare the two main methods of segmental concrete balanced cantilever construction, which are the precast segmental concrete balanced cantilever construction method and the cast-in-place segmental concrete balanced cantilever construction method. Many of the design considerations and differences between the two methods of concrete superstructure construction will be discussed in detail. Then the construction of both methods will be discussed in significant detail with a focus on various pre-bid construction items and modern construction means & methods. The presentation will conclude with comparisons of durability, aesthetics, construction costs and life-cycle costs between the segmental concrete balanced cantilever construction methods.

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