Retaining Wall Drainage Rock Size
However nearly 80 of all residential retaining walls fail at one point or another because of poor drainage.
Retaining wall drainage rock size. Unfortunately as the size increases it becomes harder to shovel. The sizes available are 5mm 10mm 20mm and 40 50mm. We refer to the material used for the base within and behind the block as wall rock. 3 4 dga or q p is used for road base asphalt and as a base for concrete pavers.
A retaining wall is intended to hold back soil when there is a drastic change in elevation. Proper drainage for a rock retaining wall. After going to all the trouble of building a retaining wall the last thing you need is for it to collapse because of mud and water damage at its base. 3 4 clean is used for drainage behind walls and is also used as fill and for drainage projects such as french drains.
With proper retaining wall drainage and construction it can bring a lot of character and function to your landscaping. Retaining walls are a seemingly simple enhancement to any landscaping project. Good drainage and compaction will add to the quality and performance of your finished wall. Larger sized rock is also on hand or can be sourced.
For a stacked block retaining wall that s no higher than four feet a trench filled with three inches of crushed rock will help keep the wall from shifting and settling. Larger rock with its irregular nature has larger air spaces or voids when packed into a drainage system. 6 to 38 mm is the ideal wall rock size. Basics of retaining wall design 10 editionth a design guide for earth retaining structures contents at a glance.
Often retaining walls are used to terrace yards that originally had a steep slope additionally retaining walls can help create usable outdoor space as well as control erosion see landscaping a split level home low retaining walls are frequently used as planting beds and can add interest to an. Crushed or smooth stone well graded compactable aggregate ranging in size from 0 25 in. Our experts are happy to provide solutions for your retaining wall needs. 3 4 there are two options at this size clean and dga.
This tends to lead to less restriction and greater water flow capacity.