Definition of cofferdam in English:

cofferdam

Line breaks: coffer|dam
Pronunciation: /ˈkɒfədam
 
/

noun

A watertight enclosure pumped dry to permit construction work below the waterline, as when building bridges or repairing a ship.
More example sentences
  • Its diversion tunnel is accompanied by upstream and downstream cofferdams that permit construction of the main dam.
  • The construction scheme employed on the bridge consisted of cofferdams for the drilled shaft foundations, and climbing forms for the tower construction.
  • The 1,050 mm diameter outfall on the west side of the airfield required a temporary cofferdam during its construction.

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