Saint Petersburg Flood Protection Barrier
Construction of the main elements of the Flood Protection Barrierstarted in 1981, but the project was fully implemented only in 2010.
The barrier secures the flood protection with extreme high water being 4.55m, top level of the storm wall at the sea level datum— 7.5 m. Barrier include two navigation structures (С-1 and С-2), 6 water sluices (В-1 – В-6), 11 dams (Д-1 – Д-11), the road constructed on the embankments dams with a tunnel, bridges and crossings, motorway, approach channels.
The construction of navigation structure С-1 six-lane road tunnel
In October, 2008 the principal marine route of Saint Petersburg, navigation structure С-1 was ready for operation.
One month later the temporary route that was in use during C-1 construction was filled in.
Right after construction of six-lane motorway started, including the tunnel, which is 1,961 m long, 43 m wide and with the deepest section at the level of 28 m. It is a part of the navigation structure С-1, that is, in turn, a part of Flood Protection Barrier, a complex hydro-engineering facility.
The tunnel has two main tubes. Each tube carries three-lane motorway (each tube is 15.25 m wide). One more tube (in the center) is designed for maintenance systems and evacuation. Besides, on the outer side there are two cable galleries. The length of the underground section is 1,189 m, the two ramp sections are 386 m long and the two change-over areas are each 30 m long.
State-of-art technologies were implemented during construction, including new method of waterproofing with the use of PVC-membrane in particular. Engineering networks for the tunnel operationanswers the highest world standards.
The key feature of the south part construction is in bedding being not soil, but mat on the pile foundation. The superstructure of South part (717 m long) is made of sections. It includes 9 ramp, 2 portal, 9 tunnel sections, jointed each 30-40 m. Joint is a sandwich panel, consisting of two asbestos-cement-sheets, with plastic foam in between. Then special rubber and waterproofing are added.
At the last stage the joint is concreted. Such a structure, thanks to deformation capacity, balances appearing strains and helps to secure structural integrity of the tunnel.
Additional articles
Select an article of interest:
Denmark opens tunnel crossing in Faroe Islands
December 18, 2020
The second stage of the Bangalore Metro continues
December 16, 2020
Construction of a tunnel under the Brahmaputra River is planned
December 11, 2020
Maintenance of the Twin Peaks Tunnel begins in San Francisco
December 9, 2020
Construction of the 4th metro line begins in Cairo
December 8, 2020
A tunnel has been built for a high-speed railway in Indonesia
December 4, 2020
Tell us about our article to your friends,
sharing a link in a social network
Comments (0)
I hereby confirm that I am familiar with the privacy policy of
and agree to the processing of personal data. Read more