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General Information

Name in local language: Ganterbrücke
Beginning of works: Summer 1976
Completion: 18 December 1980
Status: in use

Project Type

Structure: Extradosed bridge
Support conditions:
Secondary structure(s): Structurae Plus
Function / usage: Road bridge
Material: Prestressed concrete bridge
Structurae Plus
Structurae Plus
Plan view: Structurae Plus
Equipment: Structurae Plus
Construction method: Balanced cantilever method

Awards and Distinctions

Location

Location: , ,
Address: N9
Carries:
  • Simplon Pass
Part of:
Coordinates: 46° 17' 47.81" N    8° 3' 1.99" E
Show coordinates on a map

Technical Information

Dimensions

main span 174 m
length of side spans 127 m
total length 678.00 m
span lengths 35.00 m - 50.00 m -127.00 m - 174.00 m - 127.00 m - 80.00 m - 50.00 m - 35.00 m
horizontal radius of curvature min. 200 m
roadway / carriageway width 9.00 m
deck deck depth 2.50 - 5.00 m
deck width 10.00 m
piers width 10.00 m
pylon P3 height 150 m
pylons width 12.00 m
pylon height (above deck) 17.43 m

Cost

cost of construction Swiss Franc 23 5000 000

Materials

superstructure prestressed concrete
piers reinforced concrete
abutments reinforced concrete

Case Studies and Applied Products

RESTON®POT – Pot Bearings

RESTON®POT – Pot Bearings

mageba Pot Bearings are durable bearings that can be used in many situations, whether in big or small bridges, or a variety of engineering structures.

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TENSA®MODULAR LR & LR-LS – Modular expansion joints

TENSA®MODULAR LR & LR-LS – Modular expansion joints

Modular Expansion Joints can be constructed for any movements, from about 100 mm up to 2,000 mm and more. They allow movements in all 3 directions and rotations around all 3 axes.

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Technical description

Load-Bearing Structure

The load-bearing structure of the Ganter Bridge consists of a longitudinally and transversely prestressed jointless eight-span frame. The bridge girder is designed as a rectangular box girder without lateral brackets. The flanges of the two main piers P3 and P4 are raised laterally next to the bridge girder and serve as pylons for the four prestressed tension sheaves. Piers P2 to P7 are rigidly connected to the superstructure; only pier P1 and the two abutments have sliding bearings. Piers P1, P2 and P3 are restrained in the rock on the right side of the valley. The footings of piers P4, P5, P6, and P7 are sliding bearings to compensate for the creep of the left valley slope, and pier footing P4 is temporarily fixed (articulated).

Bearing:

  • WL North:
    • 2 sliding bearing Na / Nb (side Brig)
    • 1 guided bearing Nc
  • Pillar P1:
    • 2 sliding bearing 1a / 1b
    • 1 guided bearing 1c
  • WL South:
    • 2 sliding bearing Sa / Sb (side Simplon)
    • 1 guided bearing Sc
  • Pillar P4:
    • 2 fixed bearings, PN 10.200 adjustable on sliding surface
    • 2 longitudinal force bearings F 560
    • 1 transverse force bearing F 780
  • Pillar P5 / P6:
    • 2 sliding bearings PNGA 2'400 and PNGA 2'900 on sliding surface adjustable
    • 1 shear force bearing F 325
  • Pillar P7:
    • 2 sliding bearings 7a / 7b

Roadway expansion joints:

  • WL North (Brig side): 2-section modular expansion joint
  • WL South (Simplon side): 5-section modular expansion joint
  • .

Prestressing systems:

  • Longitudinal prestressing: cable with strands ø 0.50" (1'600/1'800 N/mm²), VSL system
  • Cross prestressing: bar tendons (850/1'050 /mm²), Dywidag system

Sealing / surfacing:

PBD bituminous waterproofing membrane / base course HMT 16 N as well as top course AB 11 N

Special equipment:

  • Lighting: along the entire length of the box girder
  • Safety barriers: guide wall in solid reinforced concrete with lateral guardrail profile A and IPE posts with box section 150 / 180 placed on top of the wall crown.

Anchorages:

  • Rock anchorages piers P2 / P3: cable with strands ø 6" (1'600 / 1'800 N/mm²) system Freyssinet

Excerpt from Wikipedia

Ganter Bridge is a reinforced concrete road bridge which is the longest spanning bridge in Switzerland, located along the Simplon Pass road in the canton of Valais about 10 km (6 mi) south of Brig. It was designed by renowned Swiss civil engineer Christian Menn and completed in 1980. The overall length is 678 m (2,224 ft) with a main span of 174 m (571 ft), and a maximum tower height of 150 m (492 ft).

The bridge's form consists of an S-curve high above the Ganter River, at an elevation of about 1,450 m (4,760 ft) above sea level. Two main towers and five smaller piers support a total of eight spans with lengths of 35 m (115 ft), 50 m (164 ft), 80 m (262 ft), 127 m (417 ft), 174 m (571 ft), 127 m (417 ft), 50 m (164 ft), and 35 m (115 ft). The longest span between the two towers is straight, while the remaining spans lie along curves with a radius of 200 m (656 ft).

Its unique design, combining elements of a cable-stayed bridge and a prestressed cantilever hollow-box girder bridge, with triangular concrete walls above the roadway which contain the prestressed cable-stays, has been awarded many prizes. This hybrid type of cable-stayed and girder bridge is sometimes referred to as an extradosed bridge.

Text imported from Wikipedia article "Ganter Bridge" and modified on 22 July 2019 under the CC-BY-SA 3.0 license.

Relevant Web Sites

Relevant Publications

More publications...
  • About this
    data sheet
  • Structure-ID
    20000026
  • Published on:
    28/10/1998
  • Last updated on:
    23/05/2022