OasisLMS

Abstract: This paper will present the design and construction challenges of the Port Everglades Bypass Road project located in Fort Lauderdale, Florida. The project has been designed to relieve vehicle traffic at the intersection of US-1 (SR 5) and SE 17th Street, and along SE 17th Street, and includes an approximately 1, 317-feet-long highway bridge crossing several existing and proposed surface roadways.

The project alignment is in an industrial area with multiple fuel, petroleum and chemical storage tanks and support facilities. There are multiple underground utilities along the alignment, including petroleum, fuel and gas pipelines, water and sewer lines, electric and fiber optic communication lines, and stormwater drainage lines.

The bridge consists of an elevated roadway on pre-stressed concrete Florida I-Beams supported by 12 individual piers and 2 end-bents. Highly compressible organic silt and peat are present along the bridge alignment, including at the approach embankments at both ends of the bridge. Because of the numerous existing underground utilities and fuel lines at the approach embankment locations and because subsurface materials in the area potentially impacted by petroleum, removal/replacement or in-situ improvement of the organic silt and peat to construct the approach embankments using conventional earth fills and retaining walls bearing at grade was neither practical nor cost effective. Supporting the bridge required the implementation of a deep foundation system that would limit construction vibrations that would potentially impact the multiple underground utilities and petroleum pipelines in the area.

This paper/presentation will discuss in detail the analysis and design of the Auger Cast Pile (ACP) system selected for support of the bridge, which, because of the site’ s unique subsurface conditions, necessitated developing a project-specific correlation between SPT N60 data and ultimate design side-shear resistance, similar to the industry-accepted correlations by the Florida Department of Transportation (FDOT). The developed design side-shear values were validated via an extensive load test program, including multiple embedded bi-directional load tests and proof testing performed via High Strain Dynamic Testing at each bridge pier. The paper/presentation will also discuss anomalies and atypical conditions documented by non-destructive test techniques and how these were assessed and remediated during construction.

Gustavo J Hernandez; Mr. Rafael Maria Pina

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