Trojská lávka

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Coordinates: 50 ° 6 ′ 53 ″  N , 14 ° 25 ′ 0 ″  E

Trojská lávka
Trojská lávka
Trojská lávka before the collapse (2015)
use Pedestrians, cyclists
Subjugated Moldova
place Prague , Czech Republic
construction Tension band bridge
overall length 256 m
width 3.8 m
opening 7th July 1984
planner Jiří Stráský
location
Trojská lávka (Czech Republic)
Trojská lávka

The Trojská lávka ( Czech for Trojaer pedestrian bridge ) was a 256-meter long and 3.8 meter wide pedestrian bridge over the Vltava River in Prague , which the Emperor island with the district Troy joined. It opened on July 7, 1984 and collapsed around 1:30 p.m. on December 2, 2017, injuring four people, two of them seriously.

The bridge was used by visitors to the Prague Zoo and Troja Castle , among others . As a replacement, a ferry connection was set up on December 23, 2017. The construction of a new bridge for pedestrians and cyclists began in November 2019 and should be ready in October 2020.

construction

The bridge construction was unusual for the time. A similar bridge was built in Brno in 1979 and the design was later transferred to the bridge in Prague. 156 steel cables were stretched over concrete pillars north and south of the Vltava and attached to blocks on both banks. The result was a 50 meter long bridge segment on the Imperial Island, one 85 meters long on the Troy side and a 90 meter section over the river. Slabs were threaded onto the ropes and covered with polymer concrete . The incline of the path was up to 10 degrees.

The pillars and anchoring blocks were built by the “Speciálni zakládání staveb” branch of the then state-owned company Vodní stavby Praha , the actual construction was carried out by the construction company Dopravní stavby Olomouc .

history

At first there was a ferry connection between Troy and the Imperial Island. In 1976 a pontoon bridge was opened, which was destroyed by a flood in the summer of 1981. The tension cable bridge, which opened in 1984, was built according to plans by the well-known bridge architect Jiří Stráský, now a professor of civil engineering in the Department of Concrete and Stone Structures at the Brno University of Technology . The new bridge was also inundated by floods. It was renovated in 1998–1999.

View from the east of Trojská lávka, February 2003

According to information from the Czech Pirate Party , the responsible Prague building authorities were aware of the poor condition of the bridge as early as 2009. In 2011, the authorities pointed out the poor condition and estimated the remaining useful life of the structure at 5–7 years. In 2014, corrosion of the supporting steel cables was found. The bridge was last checked three weeks before the collapse, but no warning was issued. The bridge had a system that monitored its condition and sent a signal every two minutes. The last signal was received on December 2, 2017 at 1:16 p.m.

The bridge the day after the collapse
Construction of the new bridge, June 2020

Two weeks after the collapse, the fire brigade pulled the bridge segment that had fallen into the Vltava with special equipment. The Strabag company received the order to remove the rubble .

Consequences of the collapse

The head of the responsible building authority was relieved of his office. A review of all other bridges in Prague was ordered. Several of them were also in poor condition at the time of the collapse. A pedestrian bridge over the Berounka , which connects the Prague district of Lipence with the city of Černošice , was temporarily closed and reinforced with struts. As a precautionary measure , a pedestrian bridge over the Sázava between Hvězdonice and Poddubí , about 30 kilometers southeast of Prague, and a bridge over the March in Kroměříž, 240 kilometers away, similar to the Trojská lávka, were closed .

Irrespective of any later compensation, the Prague city council decided to pay the four injured immediately an amount of 50,000 kroner each (around 2,000 euros).

See also

Web links

Commons : Trojská lávka  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b c d e f g Trojská lávka , virtualni.praha.eu, accessed on December 5, 2017.
  2. ↑ a b Pedestrian bridge in Prague fell into the Vltava: four injured , Der Standard , December 2, 2017.
  3. ↑ a b c Zřícená lávka u Trojského zámku zranila čtyři lidi, kontrolou prošla před třemi týdny , Česká televize , December 2, 2017.
  4. ↑ Before it collapsed: the heavily frequented Vltava bridge in Prague-Troja , Prag Aktuell, December 2, 2017.
  5. ↑ V sobotu se místo zřícené lávky v Troji poprvé rozjede přívoz . Česká televize, December 22, 2017.
  6. ↑ Praha zahájila stavbu Trojské lávky ČTK on November 7, 2019
  7. ↑ Zkorodovala lana, Soudi o trojské lávce odborníci. Kontrola je obtížná , iDNEZ.cz, December 4, 2017.
  8. ↑ Stav Konstrukce byl velmi smutný, říká author zřícené lávky. Principy její stavby popisoval na policii , irozhlas.cz, 4th December 2017.
  9. ↑ PRAHA (Praha 7) - Troja - lávka pro pěší , Encyklopedie mostů, archived on March 10, 2007. The arrangement of the three segments can be assigned using satellite images.
  10. ↑ Trojská lávka , Pražská informační služba, filed on June 10 of 2007.
  11. ↑ prof. Ing. Jiří Stráský, DSc. , Brno University of Technology, accessed February 5, 2017.
  12. ↑ Trojská lávka nebyla v havarijním stavu, úřady tvrdí. Ale zatékalo do ní , deník.cz, December 3, 2017.
  13. ↑ Pedestrian bridge over the Vltava in Prague collapsed , Prag aktuell, December 2, 2017.
  14. ↑ Pád lávky v Praze vyšetřuje policie, příčiny zatím nejasné , tyden.ch, December 3, 2017.
  15. ↑ Lávku v Troji monitorovala čidla každé dvě minuty. Nebezpečí nehlásila , Echo24, December 3, 2017.
  16. ↑ Hasičské tanky vytáhly trosky trojské lávky z Vltavy , idnes.cz, December 14, 2017.
  17. ↑ a b Pontonový most místo zřícené trojské lávky nebude, nejde o katastrofu , novinky.cz, December 5, 2017.
  18. ↑ Kvůli tragédii v Troji začaly kontroly mostů. Na Jižní spojce hrozí omezení dopravy , Lidovky, December 4, 2017.
  19. ↑ Lávka v Černošicích je opět přístupná, lidé po ní chodili i při zákazu , idnes.cz, December 11, 2017.
  20. ↑ Obec Kaliště uzavřela lávku přes Sázavu. Lidé však zákaz porušují , ctidoma.cz, December 8, 2017.
  21. ↑ Mostů ve špatném stavu přibývá, zavřený je i železniční most v Praze , ceskenoviny.cz, December 15, 2017.
  22. ↑ Náhradní most místo spadlé lávky v Troji zatím nebude, Praha začala zavírat další mosty , Česká televize, December 5, 2017.