rail bridges
TRANSCRIPT
Railway
Bridges
•Ahmed Zakaria
•Hammad Khan
•Shahrukh Aqiq
•Ashraf Mehmood
•Asadullah Khan
•Maaz Ahmed
What is a bridge?
Bridge is the structure
which covers a gap
Types of
Bridges
• Arch
• Truss
• Cantilever
• Cable-Stayed
• Suspension
• Keystone – the wedge-shaped stone of an arch that locks its parts together
• Abutments – the structures that support the ends of the bridge
Arch Bridge
• Works by
Compression
Arch Bridge
Marsh Rainbow Arch, Riverton, KS
Railway Arch Bridge
• Piers – the vertical supporting structures
• Cables – thick steel ropes from which the decking is suspended
• Decking – the supported roadway on a bridge
Cable Stayed Bridge
Cable Stayed Bridge
•Works by Tension AND Compression
Zakim Bridge, Boston
Suspension Bridges
•Similar to Cable-Stayed
•Different construction method
Suspension Bridges
• Works by Tension and Compression
Golden Gate Bridge, San Francisco, CA
Other TypesTruss
Southern Pacific Railroad Bridge, Tempe, AZ
Cantilever
Firth of Forth-Forth Rail
Bridge, Edinburgh,
Scotland
Construction of Rail
Bridge and Railway
Tracks.
•The design and construction is similar in a way to a highway bridge
•Example a beam bridge is utilized for short spans and through truss.
•Over truss bridges are used for longer spans.
Railway Bridge
• In construction of a steel railway bridges parallel building and jacking sideways are added
Railway Track
Types of Ballast:
Causes of Railway
Bridges Failure
Reasons Why Rail Bridge Collapse
10 Earth Quake
09 Fire
08 Train Crash
07 Boat Impact
the Judge William Seeber Bridge in New Orleans in 1993. The bridge carried road traffic over a canal, and a barge passing under the bridge struck a pier supporting the bridge and severed it.
Nearly 150 feet (46 meters) of bridge collapsed as a result
06 Flood
The Quebec Bridge collapsed twice during construction before finally being built
05 Construction Error
04 Manufacturing Defects
03 Design Defects
Sometimes, bridges collapse due to design flaws
02 Poor maintenance
01 Odd occurrence
Some bridge collapses just can't be explained at all.
A bridge carrying the Connecticut Turnpike over the Mianus River collapsed in the middle of the night in June 1983
Landmark Railway Bridges
in Pakistan
Kotri Bridge
Location: Indus River Sindh(Kotri & Hyderabad)
Open: 25th May 1900Reconstruct: 1931
Khushal Rail-Road Bridge
Location: Indus River (between Jand & kohat)
Open: 1901Reconstruct: 1907Extras: shortest bridge on Indus River
Ravi Railway Bridge
Situated between Sadiq Pura, Lahore and Shahdara Bagh
on Ravi river.
Opened in: 1876.
It is composed of iron trusses over many concrete piers.
Kalabagh Road-Rail Bridge
Location: Mari Indus & Kalabagh on River IndusIt is originally designed for broad gauge line but narrow gauge line was laid.
Attock Rail-Road BridgeLocation: Attock & Khairabad on River IndusOpened: 24th May 1883 Cost: 3.2 million PKRReconstructed in 1929 Cost: 2.5 million PKR
Highest Railway
Bridges in the world
Mala Rijeka ViaductMontenegro
650 feet high495 foot spanOpened in: 1973
Qingshuihezen, China590 feet high420 foot spanOpened: 2000
Pit River BridgeCA, USA500 feet high630 foot span1942
Santa Giustina Railway BridgeItaly475 feet high256 foot span 1959
Viaduct 13Muçum, Rio Grande Sul, Brazil469 feet high(98) foot span1978
ANY QUESTION?