An ambitious project
The creation of this new work of art within the Brest metropolitan area is an exceptional undertaking, both for its rarity and for its impact on the urban environment and mobility. The “My network is growing” project includes the construction of two innovative works of art and the widening of two existing bridges, marking a crucial step in the infrastructure development of the Brest metropolitan area. Measuring 56 meters long, 15 meters wide and 6 meters high, this new work of art is designed with an Origami-type architectural aesthetic, transforming the landscape while improving traffic flow. Dedicated to the 2e tram line and active modes (pedestrians, cycles, etc.) it offers a green carpet. A special aesthetic treatment is made for the bridge supports with the construction of reinforced concrete piles for the deep foundations (hollow auger drill, concrete pump). To successfully complete this project, between 5 and 8 workers, 1 construction manager and 1 site manager will be present on site daily.
A specific treatment
A single “hammer” stack is planned between the two abutments. The central pier and the abutments take up a design with origami-type facets allowing for consistency across the entire structure and giving it a slender profile. This profile with a fruit allows the horizontality of the deck to be better highlighted. The readability of the folds of the pier is reinforced by the implementation of hollow joints of the “bird’s beak” type. The guardrails are made of metal candlesticks with a filling of a stretched stainless steel mesh offering great transparency. Please note that for reasons of homogeneity and identity, the use of stainless steel mesh for the guardrails is also planned for the Schuman and Villeneuve structures. Finally, the lighting of the pedestrian and cycle areas is provided by an LED strip inserted into the wooden rail of the guardrail.
In short
• Dimensions: 56 meters long and 15 meters wide, 6 meters high
• Special aesthetic treatment will be carried out for the bridge supports, using reinforced concrete piles for the deep foundations (hollow auger drill, concrete pump).
Prefabrication:
• 30 pre-stressed concrete beams measuring 23 metres by 80 cm and weighing 23 tonnes each will be installed using a mobile crane
• 13 semi-trailers, each 30 metres long, will transport the prefabricated beams to Brive la Gaillarde (2 beams will be loaded per semi-trailer)
Specialized equipment:
• 1 mobile crane 21 meters high
• 1 drill