Magdeburg Water Bridge

52.23055555555611.697777777778Koordinaten: 52 ° 13 ' 50 "N, 11 ° 41' 52" E

F1

Mittelland Canal

Elbe, 339.11 km

The Canal Bridge Magdeburg, with a length of 918 m, the largest canal bridge in Europe and part of the waterway cross Magdeburg. The trough bridge structure leads the Mittelland Canal at river kilometer 339.11 over the Elbe.

History

To connect the Elbe- Havel Canal to the Mittelland Canal was by planning in the 1920s, in 1934 the construction of the canal bridge was begun. The building was planned for a possible trough width of 29.7 m and a channel depth of 2.75 m. The current bridge over the Elbe should be a three span 280 m long steel structure with a maximum span of 106 m. As main support two 9.3 m high truss were provided on each side, on the bottom chords at 4.4 m high and 36.3 m long cross member should interfere with the trough load. The approach bridge was planned as a series of 20 arch bridges of reinforced concrete with generally spans of 34 m. The work was set in 1942 due to the war. At this time, the abutment, the abutment foundations and four bows were made ​​. Later, the construction of the bridge was not resumed.

After the reunion was started in 1993 as part of the German Unity Transport Project No. 17 with the re-planning of the bridge. On 30 September 1996, the zoning approval for the waterway crossing was present. The old parts were blown up and used the 53,000 m³ rubble of concrete and reinforced concrete as a base for site installations. The contract to build the bridge was issued on 15 December 1997 for 210 million DM. In the summer of the following year foundation stone was laid on 10 October 2003 was traffic handover. The construction cost of the bridge amounted to approximately 130 million euros. The total cost of the waterway crossing were estimated at more than 500 million euros.

Construction

Design parameters

As a minimum passage width were on the same 90 m and observed as minimum vertical clearance at the highest navigable water level 6.5 m. Due to the smuggling cycle of 30 minutes at the adjacent lock Hohenwarthe it was not necessary to interpret the canal bridge for traffic with a two-aisle trough width of 44 m. Therefore, a trough width of 34 m was chosen at a water depth of 4.25 m and 32 m working width.

Current bridge

The current bridge, a steel girder bridge has. Than building system in the longitudinal direction, a three-span continuous beam with a total span of 227.4 m In the two marginal fields, the span is 57.1 m and 106.2 m in the middle field. In the transverse direction, a trough cross-section is available. The two-sided outer longitudinal member having a construction height of 8.15 m and are formed than 4.0 m wide box girders on the outer side as a stand truss with towards the center covered struts and on the inner side ( trough wall ) as a solid wall construction. The longitudinal beams are high by 1.9 m cross member which are disposed at a distance of 3.54 m in the main field and the removal trough bottom, connected to each other.

The steel superstructure was delivered in pieces with a maximum weight of 150 tons per truck. The final welding was carried out on the eastern abutment on a 85 m long Verschubbahn. To assemble the bridge the incremental launch method was applied. In this case, the shunting of the current was performed using a center pontoons. 9,500 tonnes of structural steel were used.

Approach bridge

The 690.65 m long approach bridge is separated by an expansion joint on the pillars of the current bridge. The 16 - span steel girder bridge has. Than building system in the longitudinal direction of the continuous beam with typically spans of 42.85 m In the transverse direction, a trough cross-section is available. The two-sided outer longitudinal members have a structural height of 8.15 m and a full wall structure, in the upper region in a box shape is formed. The longitudinal beams are interconnected by transverse frame nine 2.3 m high. Due to the short spans the water load is removed at the bottom of the trough, especially through seven 1.9 m high side rails.

The steel superstructure was delivered in individual parts in lengths according to the rule span of 42,85 m mostly by ship. A crawler crane has levied the individual components and then they were welded together. 12,400 tonnes of steel were used in construction.

Special

Of particular interest is the system of ice prevention in winter. This increases the channel sides on air, which prevents ice formation between the trough wall and the water surface. Thus, the ice can not push apart the trough walls.

About the piers spherical bearings with 2.18 m diameter for a vertical load of 135 MN are installed.