This is explains how a retaining wall stays strong and why drainage is the most important part of the design. What you’re seeing (simple breakdown) A retaining wall is built to hold back soil on a slope. But the real danger isn’t only the soil — it’s water trapped behind the wall. Key parts in the diagram - Concrete Wall: The main structure that resists the push from soil and water. - Reinforcing Bars (Rebar): Steel inside the concrete that makes the wall stronger and helps prevent cracking. - F