The answer to 'why is my retaining wall installation' is that there are several common causes for issues with retaining wall installations, including poor soil preparation, improper drainage, incorrect wall design or construction, and settling over time. Symptoms may include cracks, leaning, or bulging in the wall, as well as erosion or drainage problems behind the wall.
To address these issues, it's important to start with a solid foundation and proper drainage. This may involve excavating and compacting the soil, installing a gravel base, and ensuring adequate drainage pipes or channels to divert water away from the wall. The wall itself must be constructed to withstand the lateral forces of the soil and any additional loads, using the appropriate materials and construction techniques. Over time, regular maintenance and monitoring for signs of wear or damage is also crucial.