Rail upgrade together with road I/11 realignment in Hrádek

Project Rail upgrade together with road I/11 realignment in Hrádek
Client Czech Rails and Czech Highway Agency
Stage Complete
Description Construction of a new bridge under I. class road over a local road

Fact File

Structure Precast frame structure OC 9,5m x 5,55m incl precast wingwalls
Span 9,5m (clear)
Height 5,55m (clear), min. clearance envelope 4,6m
Length 13,5m as 4 rings by 2,50m + 2 rings by 1,75m


The bridge structure SO 15-19-07 was specified in the tender documentation as an in-situ frame structure. ABM 1 approached the main contractor, Alpine Bau CZ, and proposed an alternative to the precast frame system of the same specifics. Alpine, considering the very tight construction space given the fact that the new realignment was situated between the existing I/11 road and existing rail, welcomed the proposal to have the full main structure installed in just TWO days. The assessment of the comparison between the quotation price and the original budget for the in-situ option was positive. Therefore the next design phase – the construction design – was, after negotiations with the Employer’s authorities, proceeded with the precast option. ABM provided for the main consultant SHB with the structural calculations of the precast frame structure and the wingwalls included for the drawings of the elements.

The installation was executed in two phases. During the first phase the main structure was installed in just two days followed by casting of the in-situ heels and proceeding with partial backfill. After that ABM came once again and in a single day installed all of the precast “L” shaped wingwalls of the structure at foundation level +850mm compared to the foundation level of the walls of the main structure. So the whole installation of the bridge structure took only 3 working days. Moreover the bridge is constructed in such a way that it can be extended in the future to a full 4 lane motorway.

Click here to view a YouTube video of how ABM construct a bridge in 3 days

Key Personnel

Main Board Directors
Pat O'Neill
Sean Minihane
Brendan O'Neill


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