Perforated Drain Pipe Behind Retaining Wall

1 2 m in height or with slopes or other surcharges above the wall will need a toe drain.

Perforated drain pipe behind retaining wall. I hear arguments for both methods but it really depends on how the pipe functions in your drainage system before going any further the pipe we are discussing here is heavy duty. In addition to the foot of backfill that is used behind your retaining wall you should also make sure that perforated piping is laid at the bottom of the backfilled portion of the wall. These will allow water to drain out of the earth and prevent your soil from getting waterlogged and excessively heavy. Pipe drains are usually installed at the base of the wall but.

To help alleviate the surrounding grade concerns there is always a minimum 1 ft 0 3 m of clean stone behind the retaining wall that will handle mostly subsurface water. The toe drain and the wall rock is designed to remove incidental water from behind the wall and is. Pipe drains also known as toe drains are perforated pipes that collect water along the length of the wall and drain it to the outside. This should be a perforated pipe to allow water to enter it through the length of the wall.

Retaining walls with a height greater than a few feet should also have weep holes that are regularly spaced in the vertical direction forming a grid pattern. Mar 19 2014 when building a retaining wall lay perforated drainage tubing at the base of the wall slightly above ground level so runoff can drain out without undermining your wall. Another method for relieving hydrostatic pressure is to install a drainage pipe behind the wall. This drainage column allows water to migrate downward to the base of the wall.

Not adding drainage pipes. 300 mm behind the block. Any reinforced wall or walls over 4 ft. Once the water makes it to the base of the wall it enters the perforated drain pipe.

Steven baczek a residential architect from reading mass who specializes in designing durable low energy homes responds. When you are installing the landscaped earth which the retaining wall is designed to hold up you should fit in some pvc pipes. In all cases wall rock is located within the cores of the block and a minimum of 12 in. When i use perforated pipe in a drainage system should the holes go up or down.

Some of these drains are vented through the front of the retaining wall while others may run the length of the wall and drain out to the sides.