New Minden canal bridge
| New Minden canal bridge | ||
|---|---|---|
 |
||
| Convicted | Mittelland Canal | |
| Crossing of | Weser | |
| place | Minden | |
| construction | Trough bridge | |
| overall length | 398 meters, trough 341 meters | |
| width | 42 meters (usable fairway) | |
| Number of openings | 2 stream openings, 6 flood openings | |
| Longest span | 54.44 meters or 36.50 meters | |
| building-costs | approx. DM 85 million (approx. € 43.5 million) | |
| start of building | October 1993 | |
| completion | August 1998 | |
| opening | August 25, 1998 | |
| construction time | five years | |
| location | ||
| Coordinates | 52 ° 18 '11 " N , 8 ° 55' 54" E | |
|
||
The New Minden Canal Bridge is a trough bridge at the Minden waterway junction in the East Westphalian city of Minden in North Rhine-Westphalia . It bridges the Mittelland Canal over the Weser and was built to complement the old canal bridge over the Weser between 1993 and 1998 to enable large motor cargo ships to cross the Weser valley .
location
The new canal bridge was planned to the north parallel to the existing old canal bridge in Minden , in order to enable large motor goods ships to pass through the Weser valley. Both bridges belong to the Minden waterway intersection and thus enable the Weser to cross . In order to guarantee access to the new bridge, the canal accesses to the bridges have been expanded. For this purpose, the old bird protection island on the western bank had to be dredged away from the entrance to the shaft lock in the Mittelland Canal.
history
Since the dimensions of the old canal bridge are not sufficient for the traffic of large motor freight ships , a new canal bridge was built as part of the Mittelland canal expansion from October 1993 as part of a so-called second voyage over the Weser. The dimensions of the new bridge were determined by the required cross-section dimensions of the bridge trough of 42 m water level width and 4 m water depth and compliance with a clearance profile for Weser shipping (30 m width, 4.50 m clearance height). This allows ships with one meter more draft to pass the bridge and also meet.
The bridge was opened on August 25, 1998 by the then Federal Transport Minister Matthias Wissmann .
technology
.jpg)
The new canal bridge was built north of the old bridge with a center distance of 50 m. The pillars of the new canal bridge are in line with the pillars of the old bridge in order to ensure that the Weser can flow freely.
A rectangular steel channel trough with a water depth of 4 meters and a water level width of 42 meters and a length of 341 m was used for the superstructure. It bridges the six flood openings with spans of 36.50 m each and the two river openings with spans of 54.44 m each. The total length of the structure is 398 m. The steel structure with a mass of 7800 t was prefabricated in 234 parts in the manufacturing plant. The total of 18 shots were delivered to the construction site in 13 parts, mostly by barge , aligned on an assembly platform, welded and installed from west to east using the incremental launching method . The construction costs amounted to around 85 million German marks . The trough weighs almost 60,000 tons including the water load.
The bridge bearings on the western and eastern banks are concrete structures that contain an internal staircase for inspection purposes.
To protect the bridge from damage by ships, it was fendered . It also has an air bubble system to prevent ice formation. Emergency locks can be used to maintain the bridge; they are 2.50 meters wide and 4.70 meters high. The trough, which is then separated from the rest of the channel, can be emptied via a drain pipe with a diameter of one meter; the water escapes directly into the Weser on the east side.
gallery
Aerial photo, view from the west (2014)
A ship drives over the bridge, taken from the west.
The Weser runs under the two bridges, on the left the old canal bridge Minden , taken at normal water level.
The new canal bridge seen from the west.
The new canal bridge seen from the east.
The passage of the river Weser, in the background the old bridge. Taken from the north.
Bridge emptied for maintenance work.
Closure of the trough for maintenance work.
Drain pipe for emptying the trough.
Web links
- Henning Buchholz: Development and importance of the waterway cross. (pdf, 2.5 MB) In: baw.de . June 7, 2018 .
Individual evidence
- ↑ a b c d e Henning Buchholz: BAW communications no. 104. Planning and construction of the new Weserschleuse Minden. In: Henry - Hydraulic Engineering Repository. Federal Institute for Hydraulic Engineering (BAW), May 2018, pp. 17-21 , accessed on February 13, 2021 .
- ^ Baukunst NRW: The Minden waterway crossing , accessed on March 30, 2016.
- ↑ Ibbenbürener Volkszeitung on August 26, 1998: New bridge over the Weser released