Puente Pampas
Uranmarca, Peru

Owner

Provías Nacional (Peru)

Contractor

CPHI Consortium (TAPUSA, Termirex)

Design

Jack López Ingenieros

Technical assistance to the contractor

CFC (Carlos Fernández Casado S.L.) – Hualca Ingenieros S.A.C.

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The Puente Pampas is a 280 m long structure with a span distribution of 70 m + 140 m + 70 m. It features a post-tensioned concrete box section constructed using the balanced cantilever method. The piers are designed as wall-type piers, supported by deep foundations with 1.2 m diameter piles. Conversely, the abutments are closed-type, utilizing shallow foundations. The bridge employs a seismic configuration with a monolithic pier-deck connection. Double diaphragm type piers provide the necessary flexibility in the longitudinal direction.

The calculation model developed with SOFiSTiK was used to perform geometry control during the symmetrical balanced cantilever construction process from the piers. Using a stage-by-stage finite element model, where piers and the deck were modeled as beam elements, all construction stages were analyzed through linear analysis, accounting for rheological phenomena (creep and shrinkage).

Based on the model results, erection elevations were determined for each phase to achieve the target final geometry and satisfy internal force requirements according to the design hypotheses. The stage-by-stage analysis provided the deformations for each step, which were compared against on-site topographic surveys of the geometry at each stage and the final bridge geometry.

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Puente Pampas
Uranmarca, Peru

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