Railway ‘American’ bridges over the Obvodny canal in Saint-Petersburg, Russia

DESCRIPTION

Reconstruction of railway bridges over the Obvodny canal in the direction of Moscow of Octaybrskaya Railway in Saint-Petersburg. Five railway bridges:

  • one single-track bridge — letter ‘Г’
  • three two-track bridges — letters ‘А’, ‘Б’, ‘В’
  • one vehicle passway combined for a single-track railway — letter ‘E’

The bridge superstructures are made in the form of combined arched metal superstructures without transferring the bearing reaction on pier, with a roadway on bottom boom. Design span is 100 m. The camber of arch is 20 m. The cross section of the superstructure consists of two arches combined by the system of longitudinal and transverse braces. Basic parameters for two-track bridges:

  • design span — 100 m
  • camber of arch — 20 m
  • distance between the arches — 10.5 m
  • weight of steel structures — 1290 t
  • volume of mallet plate’s reinforced concrete — 415 m³

Basic parameters of single-track bridge:

  • design span — 100 m
  • camber of arch — 20 m
  • distance between the arches — 6.1 m
  • weight of steel structures — 770 t
  • volume of mallet plate reinforced concrete — 245 m³

Basic parameters for combined bridge:

  • design span — 100 m
  • camber of arch — 20 m
  • distance between the arches — 12.7 m
  • weight of steel structures — 1360 t
  • volume of mallet plate reinforced concrete — 510 m³

The roadway of bridges is a flooring metal plate in the thickness of 12 mm with a cast reinforced concrete slab of mallet plate laid on the top of it. The flooring plate is reinforced by longitudinal ribs on the side of the reinforced concrete slab. These longitudinal ribs put reinforced concrete slab into cooperation with the flooring metal plate. The design load is С14. The reconstruction of bridges meant the replacement of old superstructures with the new ones for increasing the traffic capacity of the embankment and enhancing the architectural attraction of the structure:

  • span length was increased from 50 to 100 m
  • under clearance was increased up to 5 m
SCOPE OF WORKS
  • development of architectural solutions
  • design of bridge main structures
  • design of construction technology
  • design of SAC&D
  • design of Method Statement
  • design of existing bridge unbuttoning
  • scientific and technical support
  • field supervision
CLIENT

JSC ‘Russian Railways’
JSC ‘Lengiprotrans’

GENERAL CONTRACTOR

SMT-1 of JSC ‘RZDstroy’
JSC ‘Mostostroy No 6’

DESIGN PERIOD

2006 — 2007

CONSTRUCTION PERIOD

2007 — 2009