of timber sheeting used. As mentioned earlier, only specially treated timber should be used for marine
construction. A plan view and cross section of a typical timber bulkhead are shown on Figure 31. The
actual dimensions will vary depending on site conditions.
Granular material is preferred for backfill. If anchor piles are used, backfilling should begin over
them, and then proceed to the bulkhead. The joints between sheets should be kept as tight as possible.
The use of filter fabric is advisable as an added precaution to prevent loss of soil through cracks.
Supplemental drain holes should be placed at regular intervals to further facilitate the movement of water
from behind the structure, and these must always be backed with filter cloth or properly graded crushed-
stone filters.
63
Previous Page
