Tancarville Bridge

49.47300450.4642153Koordinaten: 49 ° 28 ' 22.8 "N, 0 ° 27' 51.2 " E

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Its

The Pont de Tancarville is a road bridge over the Seine near the village of Tancarville in the Seine -Maritime, France. The suspension bridge had at its opening in 1959 with 608 meters the longest span of all bridges in Europe and is still the longest suspension bridge in France.

Location

The Pont de Tancarville is about 25 km upstream of Le Havre and the mouth of the Seine in the English Channel. She was up to the completion of the Pont de Normandie 1995, the last bridge over the Seine in front of its mouth. The next bridge upstream have long been the almost 100 kilometers of river and 45 km as the crow remote bridge in Rouen, and 1977 30 km upstream standing Brotonne bridge was opened.

The bridge uses the in Tancarville reaching to the northern bank of the Seine steep slope to avoid a long driveway ramp; on the other side on the flat ground south of the Seine was such a need.

Traffic

The Pont de Tancarville is on the A 131 / E 5 from Le Havre to A13 to Paris, which is classified as N 182 in the area of ​​the bridge and its access roads. The bridge is a toll road, however, can be used by mopeds, cyclists and pedestrians free of charge.

Description

The Pont de Tancarville has four lanes and two very narrow walkways. The directions of travel are separated on the bridge only by a white line, but not by crash barriers. It is a whole, including the southern ramp 1420 m long. Measured from anchor block to anchor block has a length of 960 m, which are divided into a central field with a span of 608 m and two lateral fields, each 176 m. Your 125 m high pylons stand directly on the banks of the Seine. Your road carrier has a clear height of 50.85 m to allow the partial to Rouen -propelled cargo vessels the passage.

The floor beams of riveted trusses is the result of model tests in a wind tunnel, were excluded by the excessive vibrations of the bridge.

The pylons are made of two pillars made ​​of reinforced concrete with a constant cross -section, which are joined together below the road surface and in the upper region of the concrete panels and stiffened. Your caisson foundations range on the right bank to a depth of 18 m on the left bank with marshy soil conditions to a depth of 28 m.

The bridge originally had two supporting cables from each 60 beaten ropes. 1996-1998 the support cables were replaced and doubled. Their ends are mounted in prestressed concrete anchor blocks which transmit the tensile force of the carrying cables in the ground. The anchor block on the left bank is 47 meters high, or about as high as the Arc de Triomphe and weighs 36,000 tons. The anchor on the right bank are 30 meters deep into the rock floor.

The 400 meter -long south ramp consists of eight prestressed concrete fields. Your pillars are 21 m deep bored piles.

History

The project of a suspension bridge at Tancarville goes back to the period before the Second World War, with the construction but could be started on 15 November 1955. On 2 July 1959, the bridge was opened to traffic. She was the first major suspension bridge with pylons made ​​of concrete.