Road Duplication/Extension projects allow for an increase in traffic capacity for an existing road once it reaches its design limits. As a consequence, several bridge structures have to be widened or duplicated.
The duplication of an existing RE structure usually comprises of the following steps. (Figure 1)
- Identify panels to be dismantled/demolished or replaced later on.
- Identify panels to remain in place. This includes panels for which original design allows for the new load requirements and panels that can’t be removed for stability reasons.
- Provide a method to strengthen the wall area identified previously that will not be able to take the new loads.
- Implement the new design in order to reconstruct the wall and build the duplication as per new bridge project requirements.