Posted by Kshitija Nadgouda on July 15, 2006
Most bridge foundations over the sea are caissons that are embedded into the river-bed (or ocean floor) until a suitable firm stratum is encountered. A caisson foundation, in simple words, is like a can (although it need not be circular!). It is a watertight chamber that facilitates the operation of construction equipment by workers within it.
(Courtsey Manitoba Labour and Immigration)
The workers operate construction equipment and excavate the soil within the caisson walls thus sinking the caisson into the river-bed (or ocean floor). Compressed air is pumped into the caisson and regulated to ensure that the caisson remains stable and soil/mud/water do not rush in through the bottom.
(Courtsey Carol Denney)
Some interesting information:
- Tower Bridge London, UK
- Washington State Department of Transportation. Make sure you check out the photo album at this site.
- Brooklyn Bridge New York, USA
- Eads Bridge USA
- The Nizamuddin Bridge over Yamuna in New Delhi
Copyright Kshitija Nadgouda.