The bridge crossing over the Pinega River is designed on the Karpogory — Karpogory-Passenger section. It was built as part of the construction of the Mikun — Arkhangelsk railway line for the development of forests in the North-West of Russia.
The specialists of Lengiprotrans examined 2 places for the construction of the crossing and made up 3 options for each. As a result, a bridge was approved according to the scheme 34.2 + 89.1 + 2x111.1 + 89.1 + 34.2, with a total length of 481 m.
The bridge has two types of spans:
• for overlapping navigable spans and the main channel - metal riveted spans with ride on the bottom;
• for overlapping coastal spans - welded metal spans with a ride on top.
Designed at the facility:
• massive abutments, crumbled type, with foundations: Karpogorsky abutment — on a pile foundation, Yavzor abutment — on a natural foundation;
• massive intermediate supports, streamlined: to the level of the maximum retaining horizon of water, they are faced with natural stone, above (up to the fermenter) — reinforced concrete monolithic, with openings;
• foundations of intermediate supports on natural and pile foundations;
• channel supports on shell piles.
