What Causes a Retaining Wall to Bulge?
A retaining wall can bulge when pressure behind part of the wall exceeds the system's ability to resist it. Common contributors include saturated soil, blocked drainage, weak or settled foundation material, unsuitable backfill, inadequate reinforcement and added loads above the wall.
Bulging is evidence of movement, not merely a surface blemish.
Tiered block retaining wall with integrated steps · Fort Wayne
The pressure may be concentrated in one area
A downspout, low spot or clogged outlet can saturate a section of soil. A driveway, stored material or structure above the wall can add a surcharge load. Segmental walls can also deform when connections, reinforcement or the base no longer distribute forces as intended. The CMHA retaining-wall design overview explains how water, soils, geometry and surcharge loads affect stability.
Do not push the wall back without finding the cause
Straightening the visible face does not remove the soil or water pressure behind it. The wall may need drainage work, partial reconstruction or replacement depending on the extent and cause of movement.
Review the major causes of retaining-wall failure and water behind retaining walls. For a site-specific recommendation, request a retaining-wall assessment.
Have a slope, drainage issue, or failing wall in Northeast Indiana?
Request an on-site assessment from Unique Concrete.