Information by Heidi Zahir:<br><br>Length 235 m<br>Width. Railings 11.5 m<br>Start of construction: Jan. 2001<br>Traffic release of 5th July 2003<br>Baukosetn gross 3.6 mill €<br>Piles 3,600 m<br>Concrete bases 2.920 m m³<br>Concrete steel bases 327 t<br>Place concrete superstructure 1,740 m³<br>Concrete steel superstructure 212 t<br>Prestressing steel superstructure 73 t<br>
 <br>Design:<br><br>The road is built in the building sector in a curve with a radius of R - 540 m. The gradient in a tub with a from rounding radius of 6,100 m is in the drilldown. The pitch is variable and increases from the southern location of the cons from 1.1% to Northern to 4.9%. A concrete arch bridge with false on deck as the preferred variant was elected to the bridging of the deep-cut Valley with thickly wooded slopes of the Valley. Deamit is the topographic location and the immediate vicinity to the local development of Geschwenda through a large main span as well as transparency and ease of Konstrukton best. The plot with little viable populations in the Valley and well good commercial strategy brings rock of the Talfalnken supports the selected preferred variant.<br><br>Special features:<br><br>He represents an additional challenge for the Entwursing in the floor plan with a radius of 540 m curved bow. Dar. This problem was solved for smaller spans 1933 impressively by Robert Maillart with the Schwandbachbrücke in the Switzerland. in the confused Valley bridge with an arch span of 100 m chose an asymmetrical arch shape in the Grundrisss. The inside of the arc follows a concave radius of 399 m - so less than the road curvature with R - 540 m. The arc outside runs with one the road against curved, also concave radius of 3.00 m. The unusual, asymmetrical bow form reduces the eccentricity of the arch in the floor plan and hence the twist as a result of weight. The arc width at the top is only 5.60 m. You are grown up to the fighters on 9 m. The double curved arch edges are in a spatial voltage relative to the curve of the deck. Second degree follows the continuously curved Arch of the shape of a parabola in the view. By the inclination of the road by I.m.. 3% it is design imperative the arc fighter also at different heights, i.e. on a parallel to the roadway to reorder. The arc fighter designed emphasizes massive according to their static function to derive the large shear forces. Merges in the middle box the arch with the superstructure, and by a pronounced, 30 cm-deep return a clear visual separation between Bow and superstructure is reached. The individual component edges of the superstructure and the Bogesn be so undisturbed and separated from each other. The Konstruktonshöhen of arc - 0.9 in the Schitel - and superstructure – 1.4 m are distinctly different to create tension in the overall view. The Aufstnäderungen on the arc round pillars were performed to increase transparency in the oblique views. The circular supports, pillars washers and abutment are arranged in the plan consistently perpendicular to the axis of the building.<br><br>Construction and mounting system:<br><br>The viaduct over the confused stream has spans. 14 m and 24 m on. The track width is 8 m with a total width. the railings of 11.5 m. The superstructure is a two-bar, t-beams of prestressed concrete B-45 with a constant Konstruktionshöe of 1.40 m. The superstructure length with the arch over a solid block is monolithically connected in the arch Crown at 14.50 m. Thus, the anchorage of the bridge adjusts itself in middle of sheet.<br><br>The pillars of the arch are slim round pillars with a diameter of 80 cm. The other pillars are executed as slim plates with a thickness of 60 cm for the normal columns and 80 cm for the pillars of the fighters. This slim dimensions could only be realized, since all pillars and round columns without bearings and joints tightly with the superstructure are connected.<br><br>100 M wide-spanning arches as massive rectangular cross-section in concrete is executed on the fighters and 90 cm in the vertex B 45 with a height of 1.30 m. This results in Schlankheiten of I/h = 111 in the vertex. The arch keyword is 25,30 m, what a ratio f/I = 1/4 matches.<br><br>The Federal Republic of Germany, the free State of Thuringia is represented by the DEGES<br><br>Design, approval and implementation planning: Leonhardt, Andrä and partner consulting Eng. VBI GmbH, Erfurt, Dresden<br><br>Contractor: Ing.-civil engineering Stetzler<br>Prüfing. Dr.-ing. Zai, Berlin<br>Construction supervision, construction supervision: Köhler and Seitz Nuremberg<br>
 <br><br>Special features of the system:<br><br>Design and training such seamless bridges is particularly important to make sure that the shifts and twists of the superstructure as a result Tempeeraturänderungen, creep and shrinkage, braking and driving on subsoil movements of the building can be recorded without damage. The einhzelnen components should reduce the forced sizes wrapped be selected. Continue to the subsoil has to guarantee a good load capacity with low requirements, as is the case with the present structure. Due to their great weight loss and close to the benchmark, the slices of pillar in the axis of 30, 40, 110, and 120 can completely in the superstructure be clamped. Due to the larger movements, the pillar 20 and 130 concrete joints are fixed with the connected superstructure. The round columns on the sheet are also has concrete joints which since the clamping moments from the twisting superstructure connected, the OVR heritage from not reasonable in these sleek round columns can be removed. The bridge is designed according to the principle of the stiffened Rod arch, while "Wearing" and "Off strip" of the individual components is cleverly combined.The road bear the burden weight and traffic over the stands in the arc about bending, which they weieterleitet as compressive forces to the fighters. At the same time, the road carrier stiffens the slender bow against buckling.<br><br>Calculation and measurement:<br><br>The bridge is designed for civilian traffic loads of the bridges class 60/30 according to DIN 1072, for military Laz according to STANAG 2021 in the one-way traffic for MLC 100 and two railway transport for MLC 50/50.<br><br>Construction:<br><br>The flat-based supporting structure, consisting of a total of five symmetrical scaffold towers, was built after the production of the fighter. The towers were attached to the head with each other with four upgrade ties, which at the same time take on the formwork. The scaffold towers on point ring presses were stored to compensate for ground settlements. The arch was symmetrical cemented in five sections without counter formwork of the fighters here. Before concreting of the apex of the arch were the conditions encountered by ramping up the presses under the scaffold towers so ausgegliechen, that no additional moment in the arc as a result of the production on the fighters wear on.<br><br>After reaching the mind.-compressive strength of the concrete of 35 MN/m2 was to reduce the total deformation the arch supporting structure synchronously in 5 mm or 10 mm increments until the release of the formwork lowered, so that the bow was self-supporting.<br><br>Was then carried out a survey of the control and the load compared to the calculated values arch under its own weight. Here were the possible movements of the fighters of special interest. After production of round columns and pillars discs became the superstructure geginnend by axis 140 in a total of 10 sections with section lengths. 16 m and 29 m on a self-propelled feed armor built. By the asymmetrical concrete consequence of the superstructure in the sheetfed sector the supporting structure had are pushed to the temporary reinforcement of the arc again positive on the arch.