Viaduct over the Marmanya river

Name and location
Viaduct over the Marmanya river near the town of Sant Jandreu del Terri (Girona, Spain)
High Speed Railway Line Madrid-Zaragoza-Barcelona-French border. Section: Sant Julià de Ramis – Cornella del Terri.

Key features
Total Length: 127m
Spans: Continuous beam 26.5m + 2x37m + 26.5m
Average height: 22m
Use: High Speed Railway
Materials: Reinforced concrete piers and abutments and prestressed concrete deck.
Construction: Span by Span method, on falsework supported on the ground

Property
Railway Infrastructure Administrator, ADIF, Spain

Construction
COPROSA
Years: 2007-2010

BT Intervention
Construction project for COPROSA, technical assistance and engineering construction work.

General information
Drawings

General information

Viaduct over the Marmanya river, 127m total length, placed in the High Speed Railway Line Madrid-Zaragoza-Barcelona-French border

The static scheme is the classical in railway bridges:
– The deck is a prestressed concrete continuous box beam, 2.64m constant depth, supported on reinforced concrete piers and abutments.
– Longitudinal fixed point, against horizontal actions, is placed on an abutment. The deck is transversally fixed to all piers by means of pot bearings. Reinforced concrete piers has an “I” cross section.
-It is noteworthy that the viaduct is located in an area of moderate seismic activity, with basic soil acceleration a = 0.09g, this action hasbeing decisive in the design of many elements of the structure.

The foundations of the piers should be deep, with piles of 1500mm diameter. The foundations of the abutments are footings.

The deck is built by the span by span method, on falsework supported on the ground. The concreting of cross sections was done in to two sub-phases: bottom slab + web (first phase) and second phase, top slab.

Drawings

Viaduct over the Marmanya river 1

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Viaduct over the Marmanya river 2

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Viaduct over the Marmanya river 3

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Viaduct over the Marmanya river 4

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Viaduct over the Marmanya river 5

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