Install Drainage Pipe and Continue Backfilling
10:05
14:50
69K views
At 10:05 in
Retaining walls- SPOTTING short cuts & BAD work
What happens here
A flexible corrugated drainage pipe is installed along the base of the retaining wall, directly behind the blocks. This pipe collects water that seeps through the backfill, preventing hydrostatic pressure buildup behind the wall. The pipe is covered with a filter fabric or geogrid to prevent clogging from fine soil particles. Once the pipe is in place, the backfilling process continues, covering the pipe and the retaining wall blocks.
Goal: Integrate an effective drainage system to relieve hydrostatic pressure.
Tools and materials
- Filter Fabric / Geogrid N/A — Preventing soil from clogging the drainage pipe
- Flexible Corrugated Drainage Pipe N/A — Collecting and diverting water from behind the wall
- Shovel — Spreading backfill material
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