Urgent Structural Response in Chile

A critical beam on a bridge spanning the Libertadores Highway near Santiago, Chile, required immediate replacement after being severely damaged by an overheight vehicle. The impact compromised the structural integrity of the beam, making repair impossible and prompting Freyssinet Chile to carry out its first highway beam replacement project.

  • Owner
    Chilean Ministry of Public Works/ Ministerio de Obras Públicas
  • Client
    Autopista Los Libertadores S.A
  • Project Completion Date
    August 2016

Assessing the Damage

The collision caused the lower flange of the beam to detach at its center, exposing both active and passive reinforcement. Following a detailed structural assessment, engineers determined that the beam could not be salvaged.

Since the original beam model was no longer available, Freyssinet Chile collaborated with a precast beam manufacturer to develop a custom replacement design. This new design had to be reviewed and approved by both the project engineer and highway authorities before production could begin

  • 88.6
    Length of Damaged Beam (Ft)
  • 41.3
    Width of the Superstructure (Ft)
  • 7.1
    Thickness of Deck Slab (In)

Technical Overview

Colorado bridge - Beam replacement plans

Deck and Bearing Repairs

As part of a broader highway maintenance program, Freyssinet Chile was also tasked with repairing the deck. A three foot strip of the remaining slab was cut away, and lifting points were created to attach chains for removal. The team also chose to replace the beam’s bearings to prevent future issues stemming from the impact.

A mobile crane was used to lift the damaged beam off its supports and place it roadside. The same crane then installed the new precast, prestressed beam into position.

 

Efficient Execution of the Beam Replacement 

The crane operation lasted approximately eight hours. Remarkably, the entire beam replacement and deck repair process was completed with minimal traffic disruption—only one carriageway was closed, and traffic was rerouted via a contraflow system for about three weeks.

This project marked a milestone for Freyssinet Chile as its first highway bridge beam replacement, showcasing the team’s ability to respond quickly and effectively to urgent infrastructure challenges.

Colorado bridge - Quick lift

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