search
arrow-left Previous
Next arrow-right
Q: When the depth of water is from 4.5 m to 6 m, the type of cofferdam used is
  • A. Earthen cofferdam
  • B. Rockfill cofferdam
  • C. Single-walled cofferdam
  • D. None of the above
Correct Answer: Option C - Single walled cofferdams– Single wall cofferdams are used for small areas with a depth of water typically between 4.5 to 6 meter. Guide piles made of timber are driven deep into the river bed-below the firm ground beneath it. Double wall cofferdams– A double wall cofferdam consists of two straight parallel walls made of sheet piling that are tied together. The space between the two walls is filled with soil. • Double wall cofferdams are used in water with a depth upto 12 meters.
C. Single walled cofferdams– Single wall cofferdams are used for small areas with a depth of water typically between 4.5 to 6 meter. Guide piles made of timber are driven deep into the river bed-below the firm ground beneath it. Double wall cofferdams– A double wall cofferdam consists of two straight parallel walls made of sheet piling that are tied together. The space between the two walls is filled with soil. • Double wall cofferdams are used in water with a depth upto 12 meters.

Explanations:

Single walled cofferdams– Single wall cofferdams are used for small areas with a depth of water typically between 4.5 to 6 meter. Guide piles made of timber are driven deep into the river bed-below the firm ground beneath it. Double wall cofferdams– A double wall cofferdam consists of two straight parallel walls made of sheet piling that are tied together. The space between the two walls is filled with soil. • Double wall cofferdams are used in water with a depth upto 12 meters.