Ribeiriño bridge (case study)

The construction of the Ribeiriño bridge, part of the road N-525 linking the cities of Santiago de Compostela and Benavente, was completed in 1971. Although this road was split by the motorways A-52 and AG-53 about one decade ago, it is still vitally important to the region. The Ribeiriño bridge is 147 m long, and all of its main elements (abutments, pillars and deck) are made of reinforced concrete. Metal formwork was used in the construction of the bridge’s reinforced concrete elements. The weather conditions, pollution, traffic loads and the passage of time have caused damage to the structure. One of the significant problems is biological crusts present in most of the pillars and abutments, this problem is related to water infiltrating from the deck of the bridge.

Object description

(No object description available.)

Civil engineering type

:

Road network Bridge

Year of construction

:

1971

Composed of materials

:

Reinforced concrete

Location coordinates

:

42° 20' 44.72" N, 7° 52' 32.19" W

Country

:

Spain

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Object analysis

The methodology includes survey planning and data acquisition, data filtering, generation of ortho-images and image classification using K-means and Fuzzy C-means algorithms. Both algorithms are evaluated using two classes (biological crusts and concrete) and three classes (biological crusts, water and concrete). The selection of these algorithms is motivated by their simplicity and efficiency.

Case type

:

Research

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Object state

The primary goal is to evaluate the possibility of using intensity information from laser scanning data to detect areas with water presence and vegetation in bridge abutments and pillars. Additional goals are to increase the degree of automation of bridge inspection work and contribute providing quantitative and qualitative information for the bridge management systems.

Observed deterioration processes

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Excessive humidity

Observed damage types

:

Concrete weathering, Biological crust, Excessive humidity

Performance indicators

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Other actions (wind/temperature/earthquake)

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