Bridges. Victoria Charles
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Название: Bridges

Автор: Victoria Charles

Издательство: Confidential Concepts, Inc.

Жанр: Иностранные языки

Серия: Our Earth

isbn: 978-1-78525-922-7, 978-1-84484-773-0

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СКАЧАТЬ of the durability of the materials, the oldest bridges still standing today were generally made from stone or brick. Earlier than 200 B. C. E., Greek and Etruscan architects, who had been summoned to construct the bridges of Ancient Rome, built segmented, semicircular arches to support the initial structures. This technique allowed the construction of much longer bridges, while strengthening the structure and permitting a less-obstructed flow of water below the passage in the event of a flood. Most Roman bridges, particularly aqueducts, were built based on this principle of multiple arches.

      At the end of the 18th and beginning of the 19th century, engineers like Thomas Telford, Isambard Kingdom Brunel and John Rennie continued to use arches of cut stone or brick in their modern bridges for the durability of the materials as well as their beauty and ability to blend in harmoniously with the surrounding landscape.

      Pont-du-Gard

      Location: near Nîmes, Languedoc-Roussillon, France. Crosses: Gardon River

      Material and type: Arch bridge, stone, used as aqueduct, then road bridge, finally tourist attraction

      Dimensions: length: 275 m, long span: 25.3 m, height: 47.7 m, width of channel: 1.2 m; slope: 0.19 m/km

      Construction: 19 B. C. E.

      The Pont-du-Gard is a Roman aqueduct that was constructed during the reign of Caesar Augustus in 19 B. C. E. Composed of three layers of arches, it has a total height of about 48 metres and measures 275 metres in length. It was intended to transport water from sources of the Eure and Airan rivers, near the town of Uzès, to the city of Nîmes. A masterpiece of Roman engineering, the bridge was constructed of cut stones, using neither mortar nor cement. The water pipe, so to speak, measures 1.2 metres wide and 1.6 metres high. The aqueduct crosses the river Gardon, situated at the bottom of a deep valley, and the principle arch that spans the river has an opening of 25.3 metres.

      Pont Saint-Bénezet, also known as Pont d’Avignon

      Location: Avignon, Provence-Alpes-Côte d’Azur, France. Crosses: Rhone River

      Material and type: Fixed arch bridge, stone, road bridge

      Dimensions: spans: 20, measuring 30.8 to 33.5 m each, total length: 900 m

      Construction: 1171–1186, disused in 1680

      Construction of the Pont Saint-Bénezet, better known as the Pont d’Avignon thanks to the popular song “Sur le Pont d’Avignon”, took place in the 12th century. Tradition attributes the idea for the bridge to a young shepherd named Bénezet, who has been considered a ‘saint’ since the 13th century, although he has never been officially canonised, contrary to the common belief that his canonisation indeed took place under Pope Innocent IV.

      Of the nineteen arches that originally formed the bridge, unfortunately only four survive today, creating a particularly bold and picturesque impression. The elegant, exceptional chapel, built at the same time as the bridge between the third arch and the fourth arch, housed the tomb of ‘saint’ Bénezet. However, in the 17th century, due to the deteriorated state of the bridge and the risks of the high water levels of the Rhone, the relics were removed first to a nearby Celestine monastery, then to the collegiate church of St. Didier of Avignon at the end of the 19th century.

      Ponte Vecchio

      Location: Florence, Tuscany, Italy. Crosses: Arno River

      Architect: Taddeo Gaddi or Neri di Fioravanti, according to the source

      Material and type: Three arches bridge, in stone, used as a road bridge

      Dimensions: longest span: 30 m, length of side spans: 27 m, height of arches: 3.9 to 4.4 m

      Construction: 1335–1345

      The Ponte Vecchio, originally constructed in wood by the Romans, is the oldest bridge in Florence and one of the oldest in Europe. It was reconstructed in stone in 1345 by Taddeo Gaddi (or Neri di Fioravanti; the identity of the architect is somewhat disputed) and hosted a variety of merchants who sold their goods from tables in front of their shops. This practice still occurs today, only the goods being sold having changed from food to clothing and gold jewellery.

      Legend has it that the concept of bankruptcy originated at the Ponte Vecchio. The term was used when a vendor was deeply in debt, and his table (‘banca’) was broken, making it a ‘banca rotta’, broken table. Without a table on which to display his wares, he would be unable to continue his business.

      Ponte dei Saraceni

      Location: near Adrano, Tuscany, Italy. Crosses: Simeto River

      Material and type: Arch bridge, stone. Construction: c. 10th century

      Pont Valentré

      Location: Cahors, Midi-Pyrénées, France. Crosses: Lot River

      Material and type: Fortified arch bridge, stone, used as a road bridge

      Dimensions: length: 138 m (6 spans of 16.5 m each), width: 5 m, height of towers: 40 m, height of arch: 8.7 m

      Construction: 1308, opened 1350, completed after 1380

      The Pont Valentré is one of the most beautiful and complete works inherited from the 14th century. Its construction dates back to 1308. A fortified bridge crossing the Lot River, it connects the walls of Cahors. The city featured three other bridges built in a similar style, but the Pont Valentré remains the best preserved. It is composed of six principle arches, three square towers of three storeys each, containing scalloped staircases, and two small fortresses, one of which has almost disappeared today.

      This bridge was nicknamed the ‘Devil’s Bridge’, due to a legend about its origins. According to the tale, the master-builder grew frustrated with delays in the construction and decided to make a pact with the Devil. Satan would help with the completion of the project, according to the architect’s instructions, and take possession of the craftsman’s soul once the work was done. If, however, the Devil failed to accomplish a task set to him by the builder, the pact would be broken.

      Nearing the end of the project and in fear for his soul, the builder challenged the Devil to bring water for the last batch of mortar necessary to secure the final stones using nothing more than a sieve. The Devil could not perform the task and lost the bet. Out of revenge, the enraged demon broke stones off the northwest corner of the central tower, which was never completed.

      Paul Gout restored the bridge at the end of the 19th century, incorporating an effigy of the Devil onto the tower where stones were still missing.

      Ponte Coperto

      Location: СКАЧАТЬ