Tingstad Tunnel
TOTAL IMMERSED LENGTH: 454
DEPTH AT BOTTOM OF STRUCTURE: 16 m
HEIGHT: 7.3 m
WIDTH: 29.9 m
FABRICATION METHOD: Steel shell (bottom and walls) constructed in shallow dock. Concreting at jetty in floating condition
ENVIRONMENTAL CONDITIONS: Situated in a valley of postglacial clay. Siltation of bottom during placement of elements
DEPTH AT BOTTOM OF STRUCTURE: 16 m
HEIGHT: 7.3 m
WIDTH: 29.9 m
FABRICATION METHOD: Steel shell (bottom and walls) constructed in shallow dock. Concreting at jetty in floating condition
ENVIRONMENTAL CONDITIONS: Situated in a valley of postglacial clay. Siltation of bottom during placement of elements
Gothenburg,
Sweden
Swedish National Road Administration
Skanska
Preliminary: Christiani & Nielsen A/S Final: Skanska
4 - 93.5 m 1 - 80.0 m
454 m
16m
Project construction
1968-04-30
5
Two tubes; three lanes each way
7.3m
29.9m
Steel shell (bottom and walls) constructed in shallow
dock. Concreting at jetty in floating condition
dock. Concreting at jetty in floating condition
Situated in a valley of postglacial clay. Siltation of bottom during placement of elements
Gasketted joints
6 mm steel membrane all around. Roof and slanting parts coated with 10 cm of
concrete; remainder protected by anti-corrosive paint. Cathodic protection is also
provided.
concrete; remainder protected by anti-corrosive paint. Cathodic protection is also
provided.
Elements were placed on large nylon sacks that could be pumped full of grout. These
sacks formed the adjustment between the element and piled foundations along the
element. After the bottom of the trench was levelled with gravel, timber piles
approximately 22 m long were driven into the clay, which is 80-100 m deep. The space
under the elements at the pile groups had to be protected against the incursion of mud.
After the sacks had been grouted first, to assure good contact, the other areas were
also grouted.
sacks formed the adjustment between the element and piled foundations along the
element. After the bottom of the trench was levelled with gravel, timber piles
approximately 22 m long were driven into the clay, which is 80-100 m deep. The space
under the elements at the pile groups had to be protected against the incursion of mud.
After the sacks had been grouted first, to assure good contact, the other areas were
also grouted.
Protection stone layer 0.5 m thick was placed over the tunnel
1.1