On the western side of the Romanian town Arad, a motorway by-pass is planned.
The new construction features four lanes and emergency lanes with a roadway width of 26 m, and a length of 12 km.
In the context of the pro-
ject, four grade-separated junctions, the bridge over the Mures River with a length of 500 m
(river bridge and foreshore bridge) and twelve other bridges have to be implemented.
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BGG Consult has been com-
missioned by the construc-
tion consortium with the consulting in the fields of geotechnics and
hydrogeolo-
gy during tendering and construction phase.
The work included first of all the planning and supervision of additional subsoil explora-
tions and the preparation of
documents for submission at the local authorities. Subsequently, the deep foundations of the bridge have been optimised
and dimensioned in close coope-
ration with the designers and the inspection engineers. For the bridges, numerous pile
load tests (compressive, tensile, horizontal) are to be planned and supervised. Furthermore, soil improve-
ment measures
(vibro com-
paction) and embankments have been designed with consideration of earthquake loads.
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"Box Foundation" Mures Bridge:
The bridge across the Mures River is planned as a three-bay, bending-resistant design with field widths of
95 m / 150 m / 95 m. For the foundation of the two main pillars, a so-called box-foundation has been chosen. With this
foundation method, a bored pile box is connected to a cover slab, which is seated directly on the ground. For the
dimen-
sioning of the foundation, the skin friction at the outer side of the box on the one hand, and the ground area of
the complete box on the other hand can be taken into account. Hence, a significant optimisation in comparison to a
conventio-
nal foundation by single piles is possible.
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