Introduction
The client’s rock wall had collapsed and shifted over time, the result of an unstable soil profile in an area exposed to landslides. Patching a wall like that rarely lasts; the underlying ground keeps moving, and the symptoms come back. Our team approached the project as a soil-stability problem first and a wall second, so the rebuild would actually hold.
1. Site Diagnosis & Stripping
We started by removing the old stones, stripping the failed face, and exposing the native ground behind it. That gave us a clear read on what was moving and why. The plan from that point on was straightforward: rebuild the wall on a properly engineered base, with drainage and a reshaped slope behind it, instead of just stacking rocks back on a sliding hillside.
2. New Stabilized & Drained Base
A fresh foundation was prepared with a stabilized, free-draining granular base. Reshaping the land profile at this stage is what lets the new wall sit on firm ground and shed water cleanly, two things the original wall never had. Without that base, even perfectly placed stones eventually move again.
3. Drainage & Geotextile Membranes
Behind the wall, we installed drainage systems and geotextile membranes to keep water moving through the structure rather than building up behind it. Hydrostatic pressure is one of the main reasons retaining walls fail on this kind of terrain, so addressing it directly was a non-negotiable part of the rebuild.
4. Slope Protection by Hydroseeding
Once the wall and drainage were in, we finished the slope with hydroseeding to establish vegetation quickly. The root system limits surface erosion and protects the work we’d just buried, especially during heavy spring runoff. It’s a low-visibility detail that quietly extends the life of the whole installation.
Conclusion
Rebuilt on a stabilized and drained base, with proper geotextiles and a protected slope, the wall now does what the original couldn’t: stay where we put it. On landslide-prone ground, that combination of soil work, drainage and surface protection is what turns a one-time fix into a long-term solution.
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