Friday, 15 November 2019

The Adjoining Infrastructure to Danube Bridge Vidin-Calafat - Completed, 29.09.2012

   All the eight road and railway overpasses of the Adjoining Infrastructure to Danube Bridge are now open to traffic.  Four of them pass over the railway lines and the other four connect various   road destinations.  Most of the road junctions are resolved as the type “half-clover, one as the type “trumpet” – and one is of the combined type “half clover” and “diamond”. 
   The respective geological studies have been done before the construction of each one of the overpasses. There is a detailed geological documentation elaborated for the whole site. It specifies the areas subject to further processing or retaining operations.  In places where the route passes through loess soils, the excavation of the loess has been carried out by one meter and then returned after the compaction of layers, each of about 25 cm.  Unfit soils are excavated from other areas, according to the geology, and are replaced with gravel from the Danube.  The stability of the slopes of the overpasses at high terrains, such as that at the railway overpass -Koshava, has been studied.
   All road junctions are executed in conformity with the Rules for Design of Buildings and Structures in Seismic Areas, in force since 1987.

   When building the overpasses, the drainage of the surrounding areas from surface and ground water is done  by draining along the curb from the inside of the lay-by with the help of concrete catch-drains  or by culverts.
   The total length of all the road junctions of the Adjoining Infrastructure to Danube Bridge Vidin-Calafat is 760, 89 m.  The width  of the road paving for the one-way junctions  is 5,50 m, and for the two-way it is two lanes of 7,00 or 8,50 m  width  and two lay-bys of 1,50 m.  Steel protective railings are installed at both ends of the dividing strip.   
   The vertical road signs, located along the roads and the road junctions are made of reflective foil and the horizontal marking   is made with a while thermoplastic paint with reflective pearls.  
   The landscape shaping of the road junctions is executed with clusters of coniferous and deciduous trees and shrubs.
   A total of 117 lighting fixtures are installed  at junctions, mounted on 9-meter steel poles.