Building a bridge over water is a daunting task, and despite the many technological progresses, the basics have remain unchanged since ancient times. First a cofferdam is constructed on the riverbed and the water inside this enclosed structure is pumped out, exposing the muddy button. Upon this ground the piers of the bridge are erected.
During middle ages, the cofferdam was built using several rows of logs driven into the mud. This was made watertight using mud and reinforced with sand. Water was then pumped out from the pit by a water wheel. The subsoil was most likely reinforced using wooden piles driven with a pile driver. Upon this, a wooden foundation grate composed of oak beams and planks was placed. This grate was fixed with large round stones, which were interconnected by wrought iron bars. Once the foundation was prepared, the masonry of the pillar could be started. To build the arches, wooden falseworks were erected and precisely cut sandstone or granite blocks were placed over this falsework. Once the keystone was in place, the falsework was removed and the arch stood held together by its own weight. The arches were reinforced by putting several layers of stones over it up to the level of the bridge deck. Finally, paving was laid made of hard rock.
This process has been beautifully recreated in a 3D animation by Praha Archeologicka, a Prague-based project of the Institute of Archaeology of the Czech Academy of Sciences (CAS), Prague, and the National Heritage Institute. The example chosen in this animation is a real Medieval bridge—the Charles Bridge across the Vltava river in Prague, Czech Republic.
Construction of the Charles Bridge started in 1357, under the auspices of King Charles IV, but it was not completed until the beginning of the 15th century. The bridge has 16 arches and 15 pillars, each shielded by ice guards. It’s 512 meters long and nearly 10 meters wide. The balustrade is decorated with 30 statues and statuaries depicting various saints and patron saints, although these were erected much later, between 1683 and 1714. To preserve these statues, they were replaced with replicas during the 1960s. The originals are at Prague’s National Museum.
Until the middle of the 19th century, the Charles Bridge was the only crossing on river Vltava, which made the bridge an important connection between Prague Castle and the city’s Old Town and adjacent areas.
The bridge suffered several disasters throughout the six hundred years of its existence. Flood damages were the most frequent, with the first striking only 30 years after the bridge was completed. In 1496, one of the arches came crashing down when water damaged the supporting pillars. During the great flood of 1890 a staggering amount of rafts, logs and other floating debris stuck to the bridge and broke three arches and two pillars. Wars also caused significant damage to the bridge, especially during the end of the Thirty Years’ War when some of the heaviest fighting took place right on the bridge. During the fighting, the bridge towers were severely damaged and the remnants of almost all gothic decorations had to be removed from it afterward. The bridge escaped destruction during the Second World War, at the end of which, whatever damage it suffered was repaired and automobile traffic was banned.
Today, the Charles Bridge is one of Prague’s foremost attraction. Source
Think your friends would be interested? Share or reblog this story!
MICHAEL WALSH is a journalist, broadcaster and the author of WITNESS TO HISTORY, RISE OF THE SUN WHEEL, EUROPE ARISE, TROTSKY’S WHITE NEGROES, MEGACAUST, DEATH OF A CITY, MY LAST TESTAMENT LET GOD JUDGE ME, THE BUSINESS BOOSTER, DEBTOR’S REVENGE, IMMORTAL BELOVED, THE ALL LIES INVASION (Paperback / Ebook), THE All LIES INVASION II (Paperback / Ebook), Odyssey Adolf Hitler, INSPIRE A NATION Volume I and II, SLAUGHTER OF A DYNASTY, REICH AND WRONG, THE RED BRIGANDS, RANSACKING THE REICH, SCULPTURES OF THE THIRD RIECH: ARNO BREKER AND REICH SCULPTORS, SCULPTURES OF THE THIRD REICH VOLUME II Josef Thorak and Reich Sculptors, SCULPTURES OF THE THIRD REICH VOLUME III Porcelain and Reich Sculptors, The Exiled Duke Romanov Who Turned Desert Into Paradise, THE DOVETAILS, SEX FEST AT TIFFANY’S, THE PHANTOM OF OPHELIA, A Leopard In Liverpool, The Stigma Enigma (Paperback / Ebook), The Souls Meet, All I Ask Is a Tall Ship, The Leaving of Liverpool (Paperback/Ebook), Britannic Waives the Rules (Paperback/Ebook), UNTOLD SAGAS OF THE SEA Volume I (Paperback / Ebook), Whispering Hope, FOR THOSE WHO CANNOT SPEAK, and other book titles. These best-selling books are essential for the libraries of informed readers.
MICHAEL WALSH NOVELS
The revenge of a predator is a city-vigilante epic better than Death Wish A LEOPARD IN LIVERPOOL, 55 lavishly illustrated first-hand stories by a Liverpool sailor THE LEAVING OF LIVERPOOL (Paperback / Ebook), Britannic Waives the Rules (Paperback/Ebook), Latest Killer-Thriller From Michael Walsh the City Vigilante Supremo The Stigma Enigma (Paperback / Ebook), A powerful thought-provoking paranormal romance The Souls Meet, How to form a naughty ménage a trois THE DOVETAILS and SEX FEST AT TIFFANY’S.
THE PHANTOM OF OPHELIA Michael Walsh. A novel but not a work of fiction. Drawing on his real-life and location experiences this romantic-supernatural biography will ravish the reader. A page-turning terrifying white knuckle ride because these are his real-life apparitional experiences.
Latest Michael Walsh bestsellers: Those who fall victim to the taxman, banks and moneylenders are victims of legalised mugging DEBTOR’S REVENGE, The Business Booster shows you how to double your profits not your workload THE BUSINESS BOOSTER
MICHAEL WALSH is a journalist, author, and broadcaster. His 70 books include best-selling A LEOPARD IN LIVERPOOL Vigilante Thriller (Paperback / Ebook); THE LAST GLADIATORS Fiancés of Death (Paperback / Ebook); AFRICA’S KILLING FIELDS: African Victims of the Liberal-Left (Paperback / Ebook); RHODESIA’S DEATH EUROPE’S FUNERAL European to Wall Street Colonialism (Paperback / Ebook); The Stigma Enigma, RISE OF THE SUN WHEEL, EUROPE ARISE, FOR THOSE WHO CANNOT SPEAK, THE ALL LIES INVASION (Paperback / Ebook), THE All LIES INVASION II (Paperback / Ebook), The Stigma Enigma(Paperback / Ebook), INSPIRE A NATION Volume I, INSPIRE A NATION Volume II, and many other book titles. These illustrated best-selling books are essential for the libraries of informed readers.
We are in debt to our donors who finance the distribution of spin-free real news and fearlessly expressed views.
BUY FROM AUTHOR
MEGACAUST Michael Walsh. R. J. Rummel, Power Kills: Genocide and Mass Murder (Journal of Peace Research) 164 million people have been killed in cold blood this century by Capitalist / Communist governments.
SLAUGHTER OF A DYNASTY Michael Walsh. Covertly sponsored by Wall Street banks and the White House Bolsheviks seized Tsarist Russia (regime change). For 36 years news of Bolshevik atrocities and 70 million martyred Christians were censored by Western media. Lavishly illustrated, this expose reveals secrets removed from Western history books.
When ordering the book contact Michael Walsh by email email@example.com to receive your signed copy.
KEEP REAL NEWS OPEN: Donate by using Western Union, MoneyGram, Ria, registered mail or contact Michael Walsh: firstname.lastname@example.org or email@example.com 2) Follow our blog. 3) Share our stories and 4) buy our author-signed books. 5) Receive free newsletters by writing subscribe to firstname.lastname@example.org
BOOKS THAT CHALLENGE, INSPIRE, INFORM Michael Walsh, ‘Writer of the Year’ with a strong global following. Nearly 70 interesting Amazon book titles famed for changing and improving lives. CLICK TO VIEW
New stories every day!
Categories: Art and Culture