80 m high pylons are being erected on the second most important bridge of the future M-12 Highway. Journalists had a chance to see how exactly the process is arranged on the second day of the first motor rally "M-12. We Make Cities Closer" of the Avtodor State Company.
By May 2023, the builders plan to close the last span on the bridge so that it would be possible not only to walk on it, but also to drive. The length of this out-of-class bridge crossing, which connects the Vladimir and Nizhny Novgorod banks, is 1,377.6 m. It is an integral part of the 4th stage of the M-12 Highway construction. At the 4th stage, 123 km long, 1,800 people and 700 units of equipment are now operating.
The third longest bridge on the M-12 Highway is the bridge across the Sura River, which connects the Nizhny Novgorod and Chuvash banks. About 400 people and more than 60 units of equipment are involved in construction of the bridge. The length of the bridgework across the Sura river is 930.5 m and its width 25.02 m, which will allow for vehicle traffic to cross the river on two lanes in each direction. The bridge superstructure is proposed to be combined of steel part in span 1-7 with a span scheme of 84+4X126+84 and steel-reinforced concrete part in span 7-11 with a span scheme of 4x63, consisting of steel beams joined by a single-piece reinforced concrete slab of the roadway.
The bridge will enable not only travelers, but also residents of Sergach (Nizhny Novgorod Region) and Shumerlya (Chuvash Republic) to save travel time, making it convenient to deliver goods from one bank of the Sura River to the other.
As for the bridge, the elevation difference between the floodplain right bank, which is located on the territory of Chuvashia, and the high left Nizhny Novgorod bank, is about 74 m. The builders will flatten this terrain, and the difference in marks between the 1st and 11th pillars will be 27 m. On the left bank, on the approaches to the bridge, an excavation is being developed in a section of 1,100 m, with a volume of about 1 million 900 thousand cubic meters of soil. After the development is completed, the excavation depth will reach 28 m. Bridge piers up to 29.5 m high will be erected on the left bank, three of which built using the continuous concreting method in sliding formwork.
At the 6th stage of the M-12 Highway, 14 km from the bridge over the Sura River, a junction is being built at the intersection with the Cheboksary-Surskoye regional road, which is located 13 km from the city of Shumerlya. In Nizhny Novgorod Region, the interchange will be located at the intersection with the Rabotki - Poretskoye regional highway, 7 km from Sergach, and is being built as part of construction of stage 5.
The length of the 6th stage of the M-12 Highway is more than 133 km. It passes through the territory of two constituent entities of the Russian Federation: 45 km through the territory of Nizhny Novgorod Region and 85 km through the territory of the Chuvash Republic. More than 3,500 workers, and more than 1,000 units of various road construction equipment and dump trucks are currently involved in construction of this stage.
In order to implement the project, six main bases are being completed, which include asphalt concrete, cement concrete plants, shift camps, sites for storing inert materials, including one base for construction of an out-of-class bridge across the Sura River.