The Jann-Berghaus Bridge in Leer
Second Bridge
Between 1948 and 1950 a new bridge was built. At its opening it was the largest swing bridge in the world.[3] It was demolished in 1991 due to structural defects. It bore the name Jann-Berghaus Bridge after Jann Berghaus (1870–1954), who among other things was president of the East Frisian Landscape and was very committed to regional concerns.
Third Bridge Construction
From 1989 to 1991 a new Jann-Berghaus Bridge was built in the form of a bascule bridge with a clearance width of 40 meters. On May 17, 1991, the new bridge was put into service after two years of construction. The construction costs amounted to 40.1 million DM.[6]
Widening of the clearance
New buildings of the Meyer Werft in Papenburg are transferred to the North Sea several times a year on the Ems. The Jann-Berghaus Bridge represents a navigation obstacle on the way to the North Sea, therefore Meyer Werft pushed for a widening of the clearance opening. The construction work began in summer 2008 and was completed in spring 2010.
Even before the necessary permits were granted, soil investigations were carried out at the bridge from September 2007. From November 2007, after the Water and Shipping Directorate Aurich had approved the conversion, evidence preservation was carried out on the houses in Leerort.
In June 2008 there was damage to the bottom of the construction pit, a damage point had formed when pumping out the sheet pile box. To prevent the damage from spreading, the construction pit was flooded again on June 17.
On July 28, 2008, the bridge was closed to traffic. As a replacement, a ferry connection between Bingum and Leerort with the ferry Julius was set up for pedestrians, cyclists and drivers of small motorcycles[17], while larger vehicles had to take a detour.[19] The contract for the ferry operation was awarded to Briese Shipping from Leer.[20] Roads were rebuilt in the Leer city area to handle the expected higher traffic volume due to the bridge closure as smoothly as possible. The new lanes are to be permanently retained to permanently improve the traffic situation.[21]
Initially, a part of the fixed reinforced concrete bridge with a length of 38 meters was cut and removed with the help of a floating crane. On the east side of the existing bridge leaf (bascule) a current pier was blown up on August 16, 2008 with a controlled explosion with 400 kilograms of explosives, then removed with excavator equipment and rebuilt closer to the shore. An additional, but smaller bridge leaf was then installed on it.
The new components were produced in Poland and arrived in Leer from November 2008.[28]
Originally the bridge was to be reopened to traffic about four months later at the end of November 2008, but this date was initially delayed until May 2009. Finally, the bridge was reopened to traffic on August 29, 2009.[35] Subsequently, there were still occasional shorter closures.[36][37] The work was accepted in March 2010.[38]
The conversion increased the clearance width to about 56 meters. The conversion cost 17.7 million euros.' role="button">
Marion Knoche
Between 1948 and 1950 a new bridge was built. At its opening it was the largest swing bridge in the world.[3] It was demolished in 1991 due to structural defects. It bore the name Jann-Berghaus Bridge after Jann Berghaus (1870–1954), who among other things was president of the East Frisian Landscape and was very committed to regional concerns.
Third Bridge Construction
From 1989 to 1991 a new Jann-Berghaus Bridge was built in the form of a bascule bridge with a clearance width of 40 meters. On May 17, 1991, the new bridge was put into service after two years of construction. The construction costs amounted to 40.1 million DM.[6]
Widening of the clearance
New buildings of the Meyer Werft in Papenburg are transferred to the North Sea several times a year on the Ems. The Jann-Berghaus Bridge represents a navigation obstacle on the way to the North Sea, therefore Meyer Werft pushed for a widening of the clearance opening. The construction work began in summer 2008 and was completed in spring 2010.
Even before the necessary permits were granted, soil investigations were carried out at the bridge from September 2007. From November 2007, after the Water and Shipping Directorate Aurich had approved the conversion, evidence preservation was carried out on the houses in Leerort.
In June 2008 there was damage to the bottom of the construction pit, a damage point had formed when pumping out the sheet pile box. To prevent the damage from spreading, the construction pit was flooded again on June 17.
On July 28, 2008, the bridge was closed to traffic. As a replacement, a ferry connection between Bingum and Leerort with the ferry Julius was set up for pedestrians, cyclists and drivers of small motorcycles[17], while larger vehicles had to take a detour.[19] The contract for the ferry operation was awarded to Briese Shipping from Leer.[20] Roads were rebuilt in the Leer city area to handle the expected higher traffic volume due to the bridge closure as smoothly as possible. The new lanes are to be permanently retained to permanently improve the traffic situation.[21]
Initially, a part of the fixed reinforced concrete bridge with a length of 38 meters was cut and removed with the help of a floating crane. On the east side of the existing bridge leaf (bascule) a current pier was blown up on August 16, 2008 with a controlled explosion with 400 kilograms of explosives, then removed with excavator equipment and rebuilt closer to the shore. An additional, but smaller bridge leaf was then installed on it.
The new components were produced in Poland and arrived in Leer from November 2008.[28]
Originally the bridge was to be reopened to traffic about four months later at the end of November 2008, but this date was initially delayed until May 2009. Finally, the bridge was reopened to traffic on August 29, 2009.[35] Subsequently, there were still occasional shorter closures.[36][37] The work was accepted in March 2010.[38]
The conversion increased the clearance width to about 56 meters. The conversion cost 17.7 million euros.' role="button">
Info
The Jann-Berghaus Bridge in LeerThe Jann-Berghaus Bridge in LeerDie Jann-Berghaus-Brücke in Leer
Here an explanation by Wikipedia, it cannot be explained better:First Bridge
The first bridge at the location of today's Jann-Berghaus Bridge was built between 1937 and 1940 in the form of a swing bridge. In April 1945 the bridge was blown up.
Second Bridge
Between 1948 and 1950 a new bridge was built. At its opening it was the largest swing bridge in the world.[3] It was demolished in 1991 due to structural defects. It bore the name Jann-Berghaus Bridge after Jann Berghaus (1870–1954), who among other things was president of the East Frisian Landscape and was very committed to regional concerns.
Third Bridge Construction
From 1989 to 1991 a new Jann-Berghaus Bridge was built in the form of a bascule bridge with a clearance width of 40 meters. On May 17, 1991, the new bridge was put into service after two years of construction. The construction costs amounted to 40.1 million DM.[6]
Widening of the clearance
New buildings of the Meyer Werft in Papenburg are transferred to the North Sea several times a year on the Ems. The Jann-Berghaus Bridge represents a navigation obstacle on the way to the North Sea, therefore Meyer Werft pushed for a widening of the clearance opening. The construction work began in summer 2008 and was completed in spring 2010.
Even before the necessary permits were granted, soil investigations were carried out at the bridge from September 2007. From November 2007, after the Water and Shipping Directorate Aurich had approved the conversion, evidence preservation was carried out on the houses in Leerort.
In June 2008 there was damage to the bottom of the construction pit, a damage point had formed when pumping out the sheet pile box. To prevent the damage from spreading, the construction pit was flooded again on June 17.
On July 28, 2008, the bridge was closed to traffic. As a replacement, a ferry connection between Bingum and Leerort with the ferry Julius was set up for pedestrians, cyclists and drivers of small motorcycles[17], while larger vehicles had to take a detour.[19] The contract for the ferry operation was awarded to Briese Shipping from Leer.[20] Roads were rebuilt in the Leer city area to handle the expected higher traffic volume due to the bridge closure as smoothly as possible. The new lanes are to be permanently retained to permanently improve the traffic situation.[21]
Initially, a part of the fixed reinforced concrete bridge with a length of 38 meters was cut and removed with the help of a floating crane. On the east side of the existing bridge leaf (bascule) a current pier was blown up on August 16, 2008 with a controlled explosion with 400 kilograms of explosives, then removed with excavator equipment and rebuilt closer to the shore. An additional, but smaller bridge leaf was then installed on it.
The new components were produced in Poland and arrived in Leer from November 2008.[28]
Originally the bridge was to be reopened to traffic about four months later at the end of November 2008, but this date was initially delayed until May 2009. Finally, the bridge was reopened to traffic on August 29, 2009.[35] Subsequently, there were still occasional shorter closures.[36][37] The work was accepted in March 2010.[38]
The conversion increased the clearance width to about 56 meters. The conversion cost 17.7 million euros.Here an explanation by Wikipedia, it cannot be explained better:
First Bridge
The first bridge at the location of today's Jann-Berghaus Bridge was built between 1937 and 1940 in the form of a swing bridge. In April 1945 the bridge was blown up.
Second Bridge
Between 1948 and 1950 a new bridge was built. At its opening it was the largest swing bridge in the world.[3] It was demolished in 1991 due to structural defects. It bore the name Jann-Berghaus Bridge after Jann Berghaus (1870–1954), who among other things was president of the East Frisian Landscape and was very committed to regional concerns.
Third Bridge Construction
From 1989 to 1991 a new Jann-Berghaus Bridge was built in the form of a bascule bridge with a clearance width of 40 meters. On May 17, 1991, the new bridge was put into service after two years of construction. The construction costs amounted to 40.1 million DM.[6]
Widening of the clearance
New buildings of the Meyer Werft in Papenburg are transferred to the North Sea several times a year on the Ems. The Jann-Berghaus Bridge represents a navigation obstacle on the way to the North Sea, therefore Meyer Werft pushed for a widening of the clearance opening. The construction work began in summer 2008 and was completed in spring 2010.
Even before the necessary permits were granted, soil investigations were carried out at the bridge from September 2007. From November 2007, after the Water and Shipping Directorate Aurich had approved the conversion, evidence preservation was carried out on the houses in Leerort.
In June 2008 there was damage to the bottom of the construction pit, a damage point had formed when pumping out the sheet pile box. To prevent the damage from spreading, the construction pit was flooded again on June 17.
On July 28, 2008, the bridge was closed to traffic. As a replacement, a ferry connection between Bingum and Leerort with the ferry Julius was set up for pedestrians, cyclists and drivers of small motorcycles[17], while larger vehicles had to take a detour.[19] The contract for the ferry operation was awarded to Briese Shipping from Leer.[20] Roads were rebuilt in the Leer city area to handle the expected higher traffic volume due to the bridge closure as smoothly as possible. The new lanes are to be permanently retained to permanently improve the traffic situation.[21]
Initially, a part of the fixed reinforced concrete bridge with a length of 38 meters was cut and removed with the help of a floating crane. On the east side of the existing bridge leaf (bascule) a current pier was blown up on August 16, 2008 with a controlled explosion with 400 kilograms of explosives, then removed with excavator equipment and rebuilt closer to the shore. An additional, but smaller bridge leaf was then installed on it.
The new components were produced in Poland and arrived in Leer from November 2008.[28]
Originally the bridge was to be reopened to traffic about four months later at the end of November 2008, but this date was initially delayed until May 2009. Finally, the bridge was reopened to traffic on August 29, 2009.[35] Subsequently, there were still occasional shorter closures.[36][37] The work was accepted in March 2010.[38]
The conversion increased the clearance width to about 56 meters. The conversion cost 17.7 million euros.Hier eine Erläuterung durch Wikipedia, besser kann man es nicht erklären:
Erste Brücke
Die erste Brücke am Standort der heutigen Jann-Berghaus-Brücke wurde 1937/1940 in Form einer Drehbrücke errichtet. Im April 1945 wurde die Brücke gesprengt.
Zweite Brücke
In den Jahren 1948 bis 1950 wurde eine neue Brücke errichtet. Sie war bei ihrer Eröffnung die größte Drehbrücke der Welt.[3] Sie wurde wegen Baufälligkeit 1991 abgerissen. Sie trug den Namen Jann-Berghaus-Brücke nach Jann Berghaus (1870–1954), der u. a. Präsident der Ostfriesischen Landschaft war und sich sehr für regionale Belange eingesetzt hatte.
Dritte Brücke Bau
Von 1989 bis 1991 wurde eine neue Jann-Berghaus-Brücke in Form einer Klappbrücke mit einer Durchfahrtbreite von 40 Metern errichtet. Am 17. Mai 1991 wurde die neue Brücke nach zweijähriger Bauzeit in Dienst genommen. Die Baukosten betrugen 40,1 Millionen D-Mark.[6]
Verbreiterung der Durchfahrt
Auf der Ems werden mehrfach im Jahr Neubauten der Meyer Werft in Papenburg in die Nordsee überführt. Die Jann-Berghaus-Brücke stellt dabei ein Schifffahrtshindernis auf dem Weg zur Nordsee dar, daher trieb die Meyer Werft eine Verbreiterung der Durchfahrtsöffnung voran. Die Bauarbeiten begannen im Sommer 2008 und wurden im Frühjahr 2010 abgeschlossen.
Noch vor Erteilung der erforderlichen Genehmigungen wurden ab September 2007 Bodenuntersuchungen an der Brücke durchgeführ Ab November 2007, nachdem die Wasser- und Schifffahrtsdirektion Aurich den Umbau genehmigt hatte, wurde an den Häusern in Leerort eine Beweissicherung durchgeführt.
Im Juni 2008 kam es zu einem Schaden in der Sohle der Baugrube, beim Leerpumpen des Spundwandkastens hatte sich eine Schadstelle gebildet. Um zu verhindern, dass sich der Schaden ausbreitet, wurde die Baugrube am 17. Juni wieder geflutet.
Am 28. Juli 2008 wurde die Brücke für den Verkehr gesperrt. Als Ersatz wurde für Fußgänger, Radfahrer und Fahrer von Kleinkrafträdern[17] eine Fährverbindung zwischen Bingum und Leerort mit der Fähre Julius[18] eingerichtet, während größere Fahrzeuge einen Umweg fahren mussten.[19] Der Auftrag für den Fährbetrieb hierzu wurde an Briese Schifffahrt aus Leer vergeben.[20] Im Leeraner Stadtgebiet wurden Straßen umgebaut, um das durch die Sperrung der Brücke erwartete höhere Verkehrsaufkommen möglichst reibungslos abzuwickeln. Die neuen Spuren sollen dauerhaft erhalten bleiben, um die Verkehrssituation dauerhaft zu verbessern.[21]
Zunächst wurde ein Teil der festen Stahlbetonbrücke mit einer Länge von 38 Metern zerschnitten und mithilfe eines Schwimmkrans entfernt. Auf der Ostseite der bestehenden Brückenklappe (Basküle) wurde am 16. August 2008 ein Strompfeiler mit einer Lockersprengung mit 400 Kilogramm Sprengstoff gesprengt, anschließend mit Baggergeräten beseitigt und näher am Ufer neu errichtet. Darauf wurde dann eine zusätzliche, aber kleinere Brückenklappe installiert.
Die neuen Bauteile entstanden in Polen und trafen ab November 2008 in Leer ein.[28]
Ursprünglich sollte die Brücke bereits rund vier Monate später Ende November 2008, wieder für den Verkehr freigegeben werden, dieser Termin verzögerte sich jedoch zunächst bis Mai 2009.Schließlich wurde die Brücke am 29. August 2009 wieder für den Verkehr freigegeben.[35] Anschließend erfolgten noch zeitweise kürzere Sperrungen.[36][37] Im März 2010 wurden die Arbeiten abgenommen.[38]
Durch den Umbau wurde die Durchfahrtsbreite auf etwa 56 Meter vergrößert. Der Umbau kostete 17,7 Millionen Euro.