Depending on the height of the dam wall and the capacity of the reservoir it may be desirable to leave channels for water to runoff between bags in the top tier.
Unopened concrete bag wall.
As an alternate drive straight rebar rods down through the bags as shown.
An easy way to build retaining walls.
Over time the bags will degrade and you will have an elegant and permanent retaining wall.
The paper slowly comes off and should be gone in 6 months.
Wet the bags daily for a couple of days.
For a low wall you can use the small concrete blocks that kms linked to.
Leave the concrete in the bag stack like legos wet with a hose core77 building a retaining wall in the conventional ways is not a trivial matter.
A simple cost effective way to make a retaining wall is to stack 60 lb.
Once the bags are laid you wet everything down thoroughly with a hose saturating all of the bags.
The 2020 update is now up today june 15 2020 a 5 5 minute video update about my concrete bag retaining wall it s a real nail biter.
Rather than messing around with mortar they lay the walls down like lego pieces using concrete while it s still in the bag.
So diyers have come up with an interesting trick.
The webers 25 548 views.
Step 7 fill the trench between the dirt and the concrete wall with some gravel.
Driven into the bags.
There are other important steps in this process such as proper backfill and drainage to remove water from behind the wall.
2 feet is the max height for those blocks and if built on a proper base and with the first course level you can backfill the wall up to 2 feet tall.
Alternate the staple direction from bag to bag and tier to tier.
Set it back about a half to a quarter inch so the wall will lean gently into the hill.
That s right the idea is that you don t open the packaging.
There are block retaining walls stone retaining walls and poured concrete retaining walls but these can be quite complicated and expensive.
Concrete bag retaining wall pt 2.
The bags will set.
Offset the next row by about half or a third of the length of the concrete bag while stacking it on top of the first row.