Elbe bridge Riesa (street)

from Wikipedia, the free encyclopedia

Coordinates: 51 ° 18 ′ 39 ″  N , 13 ° 17 ′ 44 ″  E

B169 Riesa bridge over the Elbe
Riesa bridge over the Elbe
Convicted Federal Highway 169
Subjugated Elbe , km 108.21
place Riesa
construction Composite steel bridge
overall length 365 m
width 11.45 + 10.05 m
Longest span 105 m
Construction height 2.60 m to 5.3 m
building-costs 23.5 million DM
start of building 1998
completion 2001
location
Elbe bridge Riesa (street) (Saxony)
Elbe bridge Riesa (street)

The Riesa Elbe bridge is a 365 m long road bridge and spans the Elbe in Riesa at river kilometer 108.21. The structure is on the 169 federal highway that connects Cottbus with Chemnitz .

After the old road bridge, which was located next to the railway bridge, was destroyed at the end of the Second World War, construction of a new road bridge began in 1953 upstream at a distance of 200 m from the railway overpass. The structure was completed in 1956. It was the first major bridge that was built in the GDR . Due to the inadequate state of construction, this bridge was replaced in 2001 by a new construction located downstream at a distance of 24 m.

Bridge from 1956

The 345.95 m long structure was a steel girder bridge with six openings. The construction was designed for two sidewalks and a 9 m wide carriageway. The bridge fields had spans, starting in the west, of 50.32 m in the edge field, 81.77 m in the flow field and in the following three foreland fields of 62.90 m, 56.61 m, 50.32 m and in the end field of 44, 03 m. The continuous girder construction consisted of three solid wall girders in the transverse direction , which were connected to one another by top and bottom horizontal truss ties and vertical cross ties. The 14 m wide and 15 cm thick reinforced concrete deck was divided into 18.9 m long sections and supported on secondary longitudinal girders.

The steel superstructure had a mass of 1900 tons and was assembled with the help of derrick cranes . Due to extensive damage to the carriageway slab construction and insufficient width of the structure, the bridge was dismantled after the replacement building was completed in 2001.

Bridge from 2001

The Elbe bridge is designed for four lanes as well as a footpath and cycle path located downstream. It was built in 1998 and 2001 for 23.5 million DM.

superstructure

The road bridge is a steel composite structure with five openings and has the continuous beam as a structural system in the longitudinal direction . The span of the girder bridge is 65.0 m in the southern edge field, 105.0 m in the main field above the navigation channel and in the following northern foreland fields 77.0 m, 67.0 m and 51.0 m.

The structure has two single-cell superstructures, the one downstream has a 11.45 m wide deck, the other superstructure is 1.4 m narrower. The base plate of the steel trough is the same width in both superstructures with 4.0 m, the deck slab protrudes between 2.10 m and 3.1 m.

The main girders are connected to the reinforced concrete deck using headed dowels . In the area of ​​the river piers, a 0.8 m thick reinforced concrete floor slab is also arranged as a composite over a length of 20 m.

The carriageway slab is slack reinforced in the transverse direction . In the longitudinal direction, the construction has pronounced coves above the river pillars. The construction height there is a maximum of 5.3 m. In the control areas there is a construction height of 2.8 m; at the abutment on the left bank of the Elbe it is 20 cm less due to a road underpass. Due to the constant width of the floor slab, the constant support width of the deck between the webs and different construction heights, there is a variable web inclination. To widen the road slab in the southern superstructure at the Riesa abutment, the box girder is widened with a third web.

Substructures and foundation

Solid, hexagonal whistle discs arranged in pairs support the superstructures. The river piers have pier head dimensions of 6.55 m in the transverse direction of the bridge and 3.0 m in the longitudinal direction of the bridge. The foreland piers are slightly slimmer at 5.30 m and 3.00 m respectively.

The substructures have a deep foundation with in-situ concrete driven piles with a diameter of 56 cm.

literature

  • Wolfgang Eilzer, Falk Richter, Peter Grosser, Christian Schäfer: The new road bridge over the Elbe near Riesa. Pre-planning, drafting and awarding. In: Stahlbau 67. Issue 12, 1998, pp. 902–908.
  • Erich Fiedler: Road bridges over the Elbe. A representation of the historical development of these bridges. Saxoprint, Dresden 2005, ISBN 3-9808879-6-0 .
upstream Bridges over the Elbe downstream
New Elbe bridge in Meissen Elbe bridge Riesa (street)
Elbe bridge Riesa (railway)