Retaining walls are an ancient invention. For many thousands of years ago, people grew grapes, tea and other crops on the hilly foothills. To do this, he equipped terraces, and to strengthen the treacherous mountain slopes, he built retaining walls. Wall elements Regardless of what purpose the retaining wall serves, it consists of four parts: The foundation is the underground part of the wall. The body is the aboveground part of the supporting structure. Drainage and drainage necessary to increase …