The beginning of the execution in the steel workshop of the first segments that will make up the composite (steel&concrete) truss of the New Boca del Cerro Bridge over the Usumacinta River, in section 1 Palenque-Escárcega of the Maya Train, in Mexico, is progressing at a good pace.
IDEAM SA is collaborating with Mota-Engil, and has carried out the conception, the detailed design and is providing technical assistance during execution. Recal Global is the Mexican steel workshop that is executing the steel structure.
The new viaduct is located parallel to and very close to the impressive Boca del Cerro arch bridge, in service since 1950.
The typological and structural solution chosen for the new Mayan Train bridge has started from the condition of seeking the greatest possible transparency, solving the central span of 160 m by means of a steel truss with double composite action (steel&concrete), which allows to bridge without supports the great span of the river Usumacinta -the largest in Mexico-, respecting the integration into a natural environment of extraordinary beauty and avoiding “competing” with the existing bridge, which must continue to maintain its preponderance in the landscape.
The large central span is embedde at the ends by means of two lateral short hidden spans of 30 m, with a post-tensioned concrete box girder cross-section, anchored in abutments, and will be executed by cantilever advancement using a mobile gantry that avoids any dependence on the riverbed
Once completed, it will become the bridge with the greatest span of the entire Maya Train.
Video with the constructive sequence: