Retaining Wall Gravel Base

Dig a base trench 24 in. Retaining walls can be constructed using a variety of materials from poured concrete and large timbers to natural stones even bricks. Retaining walls are designed to hold up a surcharge of soil such as a sloping hill or raised planter box.

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The wall gets its strength from a sturdy base consisting of gravel.

Retaining wall gravel base.

Follow the block manufacturer s instructions for wall height limits. Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding. A level base on which the wall sits. Choose a paver base with landscape rocks between 1 2 inch and 3 4 inch in size.

25 mm for each 1 ft 300 mm of wall height for the amount or buried block that is needed. Retaining wall base trench. All retaining walls share some common building components in their construction. Due to soil erosion your retaining wall should be built on a solid foundation made from paver base.

Round rocks such as pea gravel rolls and dislodge under pressure resulting in failure of the retaining wall. Also called drain tile at the base of the wall. To keep the blocks on your retaining wall level and structurally sound you need a base layer of several inches of well compacted sharp gravel. A handheld tamping tool can really help in getting the gravel level but you re right one stray stone can throw off the entire operation.

Next compact it and level it using either a hand or mechanical compactor. Our trenches were more like 18 24 deep or more depending on the grade and about 18 wide. Lay a 4 6 inch layer of the crushed base material in the trench. 150 mm plus an additional 1 in.

The interlocking retaining wall block can be used to build walls up to 24 to 36 inches high depending on the size of the block. More information on retaining walls where the base trench steps up a slope. Below is an overview of the different types of walls and these common components. Fill the trench with a 2 to 3 inch layer of paver base.

This is standard for all. For lower walls 2 we put 1 minimum of gravel 6 of sand then reinforced concrete base or concrete block below grade. Similar to gravel paver base is a form of construction aggregate that contains crushed rocks such as limestone. A retaining wall must have the strength to hold back the weight of the soil plants and sometimes small structures behind it.

600 mm wide the length of the wall the depth of the trench will be 6 in.

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