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Retaining Wall Construction Building A Timber Retaining Wall

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... face of the wall into the soil backfill to a distance equal to their height ... Backfill where necessary. For drainage, Drill weep holes along the wall's length ... – PowerPoint PPT presentation

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Title: Retaining Wall Construction Building A Timber Retaining Wall


1
Retaining Wall Construction Building A Timber
Retaining Wall
  • Developed by
  • Dr. Teri Hamlin
  • Georgia Department of Education

2
Timber Retaining Wall
  • To level a steep slope
  • Enclose an area for a decorative garden
  • Elevate Beds

3
Which wood?
  • Treated pine and hardwoods are good choices for a
    timber retaining wall.
  • Avoid old railway timbers as these are treated
    with creosote, which harms some plants and heavy
    to work with.
  • Also need reinforcing rods secure the structure.

4
Steps
  • Cut a beveled trench into the slope, wet the
    trench and tamp it well.

5
Steps
  • Set the first timber in place and level it.
  • This course will be completely buried in the
    ground.

6
Steps
  • The timbers are installed in a pattern similar to
    a brick wall with the butt ends of timbers in one
    course offset from those in the courses above and
    below.

7
Steps
  • Set a second timber on top of the first and bore
    a hole through the two timbers.
  • Use a heavy-duty drill with an extension bit.
  • A small bit burns out on long holes such as
    these.
  • Drive a reinforcing rod through the holes into
    the ground to hold the timbers firmly together.

8
Steps
  • In addition to the 15 degrees inward slope of the
    wall, vertical stability is achieved by
    installing tiebacks.
  • These are single timbers inserted perpendicularly
    from the face of the wall into the soil backfill
    to a distance equal to their height above the
    base of the wall.

9
(No Transcript)
10
Steps
  • Continue to lay the timbers
  • staggering the joints from one course to the next
  • Drill holes and use a reinforcing rod to pin each
    timber to the one below on each side of every
    joint.
  • Cut timbers with a sharp chain saw, and wear
    goggles to protect your eyes from flying chips.

11
Steps
  • Backfill where necessary.
  • For drainage,
  • Drill weep holes along the wall's length
  • Drill a row of holes above the ground

12
Steps
  • Fill the cavity.
  • You can top off the terraces with plantings or
    mulch.

13
Completed Jobs
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