Analyze Potential Causes of Failure

What happens here

Analyze the factors contributing to the wall's failure. The narrator identifies a primary cause for the timber wall's failure as 'soil meeting directly up against this' without proper drainage or appropriate backfill material, such as stone. This leads to soil saturation, which significantly increases hydrostatic pressure behind the wall, pushing it outwards, and also accelerates timber decay.

Goal: Understand why the retaining wall is failing.