Special foundations at the cycle-pedestrian bridge over the Trancão river, Portugal
Special foundations at the cycle-pedestrian bridge over the Trancão river, Portugal
This paper describes the special foundations solutions adopted at the cycle-pedestrian bridge built over the Trancão River, connecting Lisbon to Loures. The bridge structure is a laminated wood deck, supported by steel cables, with a 65m central main span. Considering the very low resistance and high deformability of the superficial alluvial layers, it was necessary to design a deep foundation solution, resting at the Miocene bedrock. Reflecting the local geological scenario, as well as the restraints related with the use of heavy equipment at the riverbanks, the foundation solution consists of micropiles, vertical and inclined, executed using the self-drilling methodology, associated with the execution of 500mm diameter mini jet grouting columns, ranging from about 30 to 20m. The main quality control / quality assurance (QC/QA) results, including two full scale tension load tests, are presented.
Alexandre Pinto; A. A. Rodrigues Rodrigues; P. Santos; C. Caxias
18th European Conference on Soil Mechanics and Geotechnical Engineering (ECSMGE2024)
D - Current and new construction methods
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