Main bridge Lengfurt
Coordinates: 49 ° 48 ′ 27 ″ N , 9 ° 36 ′ 18 ″ E
| Main bridge Lengfurt | ||
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| use | Road bridge | |
| Subjugated | Main , km 173.68 | |
| place | Lengfurt | |
| construction | Prestressed concrete box girder bridge |
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| overall length | 155 m | |
| width | 9.1 m | |
| Longest span | 62 m | |
| Construction height | 1.5 m to 3.1 m | |
| building-costs | 870,000 DM | |
| start of building | 1953 | |
| completion | 1954 | |
| location | ||
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The Main Bridge Lengfurt is a road bridge in Lower Franconia that spans the Main at river kilometer 173.68 and crosses the MSP 36 district road. The structure has two lanes and sidewalks on both sides and connects the Triefenstein districts of Trennfeld and Rettersheim with the district of Lengfurt.
history
Lengfurt was on the trade route from Frankfurt am Main via Würzburg and Nuremberg to Regensburg , which crossed the Main at a ford . A ferry is first documented for 1102. The importance of the ferry for national traffic came to an end with the commissioning of the Main Bridge in Marktheidenfeld in 1846. From 1895 until the opening of the first bridge in 1904, a yaw ferry was operated.
In 1901 took cement factory Wetterau on their production in Lengfurt. Among other things, this resulted in growing traffic across the Main to the Trennfeld train station on the Lohr – Wertheim railway line and ultimately led to the first fixed Main crossing in Lengfurt. The bridge was built from the spring of 1903 and was inaugurated on June 29, 1904. Most of the construction costs of around 300,000 marks had to be borne by the community, which is why a bridge toll had to be paid for use until March 1, 1942. A bridge house was built especially for this purpose. On March 31, 1945, German troops blew up the structure and completely destroyed it. Only after the clearing of the bridge parts was shipping on the Main possible again from June 1945. A small ferry was used to cross the Main until 1954. In 1952, the Marktheidenfeld district council decided to build a new bridge at an estimated construction cost of DM 850,000, the community had to pay DM 75,000, the cement works took over DM 175,000. Construction work began in the summer of 1953 and the inauguration ceremony followed on November 20, 1954.
Bridge construction from 1904
The first bridge over the Main was 170 m long and had a usable width of 6.0 m. The steel framework construction with the carriageway below spanned the Main with three openings and spans of 33.0 m in the end spans and 96.3 m in the main span. The superstructure, built by the Maschinenbaugesellschaft Nürnberg , was one of the most spanned bridges in Bavaria.
Bridge construction from 1954
A prestressed concrete bridge was used as a new building in 1954 . The pillars were rebuilt, the old abutments in the foundation area were partially reused. The construction has three fields with a total span of 155 m. In the outer fields the span is 46.5 m, and the main field spans 62.0 m.
The road bridge, which is 9.1 m wide, has two lanes, each 3.0 m, and sidewalks on both sides, each 1.3 m wide. The building system is a continuous beam in the longitudinal direction . In the transverse direction, there is a single-cell, 5.6 m wide box girder with a 0.25 m thick deck slab that protrudes 1.75 m on both sides. The hollow box with a height of 3.1 m above the pillars, 1.8 m and 1.5 m in center field to the bridge ends haunched formed and biased in longitudinal direction. In the middle of the bridge, the floor slab is 0.15 m thick and the webs 0.4 m each, above the pillars it is 0.4 m and 1.0 m respectively.
The bridge was concreted on a falsework made of round timber, which was founded on driven piles . When creating the middle field, there had to be an opening 20 m wide for shipping. This was ensured by the 10 m cantilevered superstructure and 11 m long steel girders.
literature
- Emil Mörsch : Bridges made of reinforced concrete and prestressed concrete - design and construction . Konrad Wittwer Verlag, Stuttgart 1958, pp. 179-182.
- Edith Müller, Horst Otremba: Lengfurter Mainbrücken . In: Lengfurt. A boatmen's and winegrowing village through the centuries . Triefenstein 2008. (= contributions to the history of the Triefenstein market. 6.), pp. 187–193.
