human
How do I build a retaining wall without digging a trench?
assistant
You can use soil reinforcement blocks to create a retaining wall. These blocks are made of concrete and have steel rebar inside them that will help the wall hold up against the pressure from behind. The blocks should be placed in layers, with each layer offset slightly so that the weight is spread out evenly. A good way to ensure the blocks are properly aligned is to attach metal or wooden stakes to the back of each block before it's placed. Once all the blocks are in place, you can fill in any gaps between them with gravel or stone to provide additional support. Finally, you'll need to compact the soil on either side of the wall to make sure it stays stable.