Your tilting retaining wall has for decades
been glacially creeping toward its now precarious position. When its center
of gravity moves beyond the outer-front edge of the footing, it will
immediately collapse! Just as a mountain-top snow avalanche can be set-off
by a sonic boom, so can a sudden 'pan-caking' of a leaning concrete wall be
triggered by a nearby trencher or even the vibrations of an 8 pound
sledgehammer. And when it does fall, any thing or any
body within the wall's five ft. 'shadow' will be crushed! So, don't
gamble with your life on the stability of that benign-looking, but
potentially lethal monolith.
OF THE 'TRENCH, TORQUE AND TIE'
PROCESS FOR SALVAGING
TILTING, CRACKED & FAILING
CONRETE RETAINING WALLS
A preponderance of the aging concrete retaining walls of
yesteryear were faultily designed and hastily built. Decades of unrelenting
earth pressure have glacially tilted and cracked these terrace-enabling
monoliths into precariously leaning and failing positions. A novel and
simple process now enables the enterprising Do-It-Yourself homeowner to
permanently repair, restore and lock into an upright position his huge
The 'Trench Torque and Tie' method is entirely suitable for
concrete wall of two feet to about five and one-half feet high. The key to
up-righting a wall is to relieve the earthen pressure behind the structure.
But the Ditch Witch and Case trenchers can excavate a 36" depth. So for
higher walls, a rubber-tired backhoe is required to excavate sufficiently
deep to relieve the earth pressure, permitting the up-righting movement.
This factor renders it less D.I.Y. doable. The job can still be
accomplished, but at more cost; more time and complexity.
The 'TTT' process requires
that the poured in place, reinforced concrete ground anchors be located
behind and beyond the wall's backfill material and in solid and undisturbed
earth. It is these anchors that must provide the horizontal resistance to
the earth pressure behind the wall. It is this distance, from
the wall rearward to solid earth, that determines the tension rod lengths.
So, the repair of failing walls located close to buildings are not amenable
to our D.I.Y. method.
Four separate components
combine herein to achieve this effective resurrection of an otherwise doomed
monolith. These factors are:
1. The rental Ditch Witch or Case rental trencher for
the digging labor.
2. An embedded, easy to construct, poured concrete
3. A strong, 7-day bonding, poured concrete tension
rod field splice.
4. A simple mechanical means of transferring an
immense pulling force from the wall to the ground anchor; the thread-tipped
3/4" re-bar rod. A 12" crescent wrench provides the 720 to 1 mechanical
advantage to easily re-erect and lock the wall into its permanently vertical
The D.I.Y. hand mixes his
own small batches of concrete in a wheel barrow for the ground anchors and
field splices as he installs them. This then, is the essence of the