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Build and Prep Footing. Lay out the wall and excavate the slope and the footing trench. Build the footing and insert rebar into the wet concrete at intervals corresponding to the cores in the blocks. Prepare the footing, spread mortar, and build leads, sliding the block over the rebar as needed.
A concrete block retaining wall is the perfect solution to control erosion, to eliminate a hard-to-mow slope, to add a planting bed, or to level an ideal patio area. These systems are easy to install, durable, reasonably priced and available in a variety of colors and textures.
The focus of this article will be on the construction of concrete block retaining wall. Fig.1: Concrete Block Retaining Wall (SEXTON, 2017) Fig.2: Concrete Block Retaining Wall (GADANG, 2017) Following topics regarding construction of concrete block retaining walls are discussed: Advantages and application of concrete block masonry wall
A strong concrete block retaining wall is built in a running bond pattern similar to a traditional brick wall. Each course of block is back-set by 3/4" so that, while level, the wall effectively angles back into a hillside. This way the weight of the backfill is supporting the wall and not pushing against it.
Step 1: Dig for the First Row of Block. With the layout marked, you can begin digging the trench. To bury the first row or course of block about halfway, dig the trench about 4 to 6 inches deep and 12 inches wide or twice the width of the block.
Dig a Trench. Dig a trench along the area where the wall will be built. The depth of the trench must match the height of a single block, plus 6 inches for a gravel base. For example, if you’re using 6-inch high blocks, you’ll need a trench that is a minimum of 12 inches deep and 2 times the depth of the wall unit wide.
Instructions. Step 1. Estimate the number of blocks you need for each course. (Length of the wall in inches) ÷ (length of a block) = blocks per course. Example: 228 in ÷ 11.5 in = approximately 20 blocks per course.
When it comes to retaining walls, concrete blocks are fairly straight forward to install and will last a lifetime. But, it's not as easy as just stacking the...
Pour footings and wall. If the wall exceeds four feet in height, footings should be poured separately. Allow concrete to cure. Create contraction joints every 4-6 feet. (see below for more information on contraction joints) Remove forms and install waterproofing and drainage system. Finish the surface of the wall as desired.
Due to soil erosion, your retaining wall should be built on a solid foundation made from gravel. Choose gravel that has stones sized between 1/2-inch and 3/4-inch or paver base. Fill the trench with a 2- to 3-inch layer of gravel. Use a rake to ensure the stones are evenly distributed.