Key data

  • Client: Autobahnamt Sachsen
  • Planning: 2010-2014
  • Contract price: 30 million euro
  • Scope of planning:

    Bridge design
    Highway design
    Environmental planning
    Ground engineering
    Topographic survey

    Demolition planning
    Planning of construction-phase traffic management
    Basic evaluation
    Preliminary design
    Design development
    Approval design

Rehabilitation of the A14 Mulde Bridge, Sachsen
With construction of a new autobahn bridge close by

Construction of the original Mulde Bridge was completed in 1970, together with the A14 autobahn on which it is located. The bridge, which has a total length of 342 m, showed signs of damage and deterioration which required various repair measures to be implemented. In order to facilitate these measures, and also to meet future needs, a second structure was constructed nearby. Inros Lackner was appointed to provide various planning and design services on the basis of a feasibility study – among other things, in relation to the construction of the new bridge and the repair and strengthening of the south superstructure of the existing bridge. One particular challenge was presented by the applicable conservation requirements, because the bridges cross very sensitive areas including a bird and nature protection area. 

Strengthening of existing six-span structure

  • Span lengths: 41.9 – 3 x 56.8 – 71.5 – 57 = 340.8 m
  • Composite superstructure / Precast prestressed concrete  

Construction of alternative five-span structure

  • Span lengths: 52 – 65 – 75 – 106.5 – 62.5 = 361 m
  • Height above valley floor: approx. 30 m
  • Construction type: Composite box girder
  • Standard section: RQ 31 b
  • Width between railings: 31.30 m

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