Neckar Bridge West, Hirschhorn, Germany

Neckar Bridge West, Hirschhorn, Germany

Hirschhorn Germany Concrete renovation Bridge Color PA Color PA Fill Concrete Acrylic

In the course of the B37, the Neckar Bridge West, Hirschhorn, was built as a two-span Bridge with a span of 130m and 101m as a prestressed box girder in the free cantilevered construction. The curved lower edge of the box girder and the elliptical pillars show a high design standard.

Reference identification data
Construction project:
Concrete restoration
Building type:
Other buildings
Short description
In the course of the regular test inspection in accordance with DIN 1076, the chloride concentration and the carbonation depth of the structural concrete was determined using a mobile bridge inspection device on an area of approx. 12,000m², in addition to the tests prescribed by the standard. Furthermore a random measurement of the concrete cover as well as an endoscopy of the tendon cladding tubes were carried out via the ventilation tubes. The result: urgent need for renovation.
Hessen Mobil - Straßen- und Verkehrsmanagement
Krebs + Kiefer Service GmbH
HöringBauwerksSanierung GmbH BWS Rhein-Neckar GmbH
Marcus Grendel
Site address:
69434 Hirschhorn
Date / completion:
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Sample of products or systems used


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Further references

The structure showed cracks in some places, for which there were different causes. Improved statics and higher load capacity were achieved by stiffening the structures, frictional connection of the disturbed foundation and decoupling the components gate, passage hall and gate houses components. Particularly on the western side, intense blackening of the rock surface had built up, which was strongly interlocked with the ground. The deposits were composed of a mixture of soot and plaster. The cleaning process carried out in 1990 with the help of water could only result in a superficial cleaning. In 2002, the newly developed method of particle beam cleaning and cleaning by laser made it possible to remove soot and plaster without destroying the original surface.
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On the façade surfaces of Kaispeicher A, there was a lot of efflorescence and lime aging, both signs of penetrating moisture. The damage patterns indicated a lack of frost resistance as well as no protection against driving rain. The listed façade required extensive frost and moisture protection, but was not allowed to undergo any visual changes.
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