After completion of the steel structure, the construction was stacked up by a specialist company and set down on temporary abutments.
In this state, the bridge now waits for the roadway slab to be concreted before it is moved into its end position with the aid of SPMTs.
On February 8th, 2019 the bidding consortium Züblin/Donges/Strabag was awarded the contract for the replacement construction of the Grumbachtal bridge by the State Office for Road Construction, Neunkirchen. The total order volume amounts to around € 71 million. Donges SteelTec has been commissioned with the manufacture, delivery and assembly of the 4,800 t steel structure and the corrosion protection work and will thus take over almost 30 % of the order volume.
The construction will be carried out in 2 phases of 2,400 t each, with the first phase to be completed in 2020 and the second phase in 2022. This will ensure good capacity utilisation of the Donges bridge production facilities beyond 2019.
The existing structure is a composite bridge, built in 1961. As it is not possible to repair or reinforce the structure, it will be replaced by a new structure.
The new construction is planned as a composite bridge with two separate superstructures. In order to maintain the four-lane traffic during the entire construction project, the superstructure of the 2nd partial structure will initially be constructed in a provisional lateral position on temporary substructures. After demolition of the existing structure and erection of all final substructures, as well as after construction of the superstructure of the 1st partial structure, the superstructure of the 2nd partial structure will be moved to its final position. The temporary structures are then to be demolished.
The spans were optimised in terms of structural design. In order to avoid a collision between the foundation of the existing building and the foundation of the new building and the associated complications during the construction of the structures and the bored piles, the spans were increased in comparison to the existing building.
Technical Information
Type: Composite bridge with two separate superstructures
Length: 380 m
Largest span: 86 m
Building width: 16.5 m per superstructure
Tonnage: 4,800 t
Client: State Office for Road Construction Neunkirchen
Darmstadt (Germany), March 7, 2019 – The Donges Group, specializing in steel construction and high-quality roof and façade solutions, is expanding in the flat roof systems sector. Donges SteelTec has signed a purchase agreement for the acquisition of FDT FlachdachTechnologie GmbH & Co. KG, based in Mannheim. The transaction marks the third strategic acquisition for the Darmstadt-based Donges Group and is expected to close until the end of March. This is already Donges SteelTec’s second acquisition in the current fiscal year.
Darmstadt (Germany), February 28, 2019 – Donges Group, specializing in the planning, design, engineering and construction of steel bridges and steel building constructions as well as high-quality roof and façade solutions, is expanding into Northern Europe. Today Donges signed a purchase agreement with Normek Group Oy about the acquisition of Normek Oy based in Vantaa, Finland, and its subsidiaries in Finland and Sweden. The acquisition was also closed today and marks the second add-on acquisition for German Donges Group.
According to the motto “Using the tried and true in creating something new”, BASF Wohnen + Bauen GmbH is building a new “Creation Center” office building for the employees of the BASF Design-Fabrik (“design factory”) on the roof of a former World War II air-raid shelter in Ludwigshafen.
This year Donges SteelTec GmbH once again is once again honoring its anniversary guests with a group dinner at the “Sitte” restaurant in Darmstadt. Hans Schneider has been honored for 40 years of service to the company, along with Hubert Krüger and Pierre Petri, who have already been with the company for a quarter of a century. This is a clear sign of the employees’ strong loyalty to the company. “The large number of employees who have been with the company for many years is of immeasurable value to Donges,” emphasized Managing Director Johannes Laumann in his remarks, and described the passionate commitment of the employees as an important key to the company’s success.
In a congenial atmosphere and festive setting, the anniversary celebrants marked the occasion with their partners, superiors, works council members and management, who honored each employee with an individual laudation.
A special honor was bestowed upon Hans Scheider for his 40 years of service. He received a certificate of congratulations from the State of Hesse for his many years of employment with the company.
The initial steel components of the second construction phase were completely pre-assembled in the form station. Sections 1 to 5 have been placed on the completed staging frame.
In the next step, the interior diagonal sections were installed. Since then, the welding work on the entire superstructure has been in full swing.
By the end of the year, the lateral cantilevers will be assembled before the entire first increment cycle is moved in February.
Steel construction is nearing completion on the north bridge structure.
The deck coating has already been applied on more than half the bridge.
The welding work of the second half is almost complete and the corrosion protection work is in full swing.
After completion of the steel construction, the later roadway slab still needs a layer of concrete before it can be moved via SPMTs into its final position in spring.
In another night operation, the last steel components were assembled on the A45 Dorlar viaduct.
The 650t crawler crane was once again deployed. It successfully lifted the end cross girder in axis 12 and the four corresponding longitudinal girders.
Assembly of the supply mast began in mid-October.
First came the base point, followed by placement of the initial four sections on top of each other. Afterwards, the sections are welded together before assembly of additional sections continues.
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