Machine-translated by Google. Questions are authored in English.
Top

Discussion

The filter rule between successive layers of a rubble mound limits

  • A.the slope angle at which the armour may be constructed
  • B.the number of individual armour units placed per square metre
  • C.the ratio of the sizes of adjacent layers to prevent washout
  • D.the total height of the structure above the sea bed level

Answer: C

Too large a ratio allows the finer material beneath to wash out through the voids above. A ratio of roughly four to five between successive layers is the conventional guide. A geotextile substitutes where the step is too large.

No comment is present. Be the first to comment.
Loading…

Post your comment

Please log in or register to post a comment.