The most effective way to level a sinking pool typically involves a professional solution using helical piers and tiebacks to stabilize the structure.
Here's a breakdown of the process:
Understanding the Problem:
A sinking pool indicates soil instability beneath or around the pool's structure. This can be caused by various factors, including:
- Poor soil compaction: Inadequate compaction during the initial pool installation.
- Erosion: Water runoff eroding the soil around the pool.
- Expansive soils: Soils that expand and contract with moisture changes.
- High water table: Ground water affecting the soil stability.
- Tree roots: Growing tree roots displacing soil.
The Helical Pier Solution:
Helical piers are steel shafts with helix-shaped plates welded to them. They are screwed into the ground to reach stable, load-bearing soil or bedrock, effectively bypassing the unstable surface soil.
Here's how they're used to level a sinking pool:
- Assessment: A geotechnical engineer assesses the soil conditions and determines the number and placement of helical piers needed.
- Installation: Hydraulic equipment is used to screw the helical piers into the ground around the perimeter of the pool or beneath the pool’s foundation. The piers are driven deep until they reach competent soil.
- Brackets: Brackets are attached to the helical piers and the pool's structure.
- Lifting (if needed): In some cases, hydraulic jacks may be used to carefully lift the sunken portion of the pool back to its original level. This is a delicate process that requires careful monitoring to avoid further damage.
- Stabilization: The brackets are then permanently secured to the pool's structure, providing stable support and preventing further sinking.
Helical Tiebacks/Anchors:
If lateral movement or soil pressure is also a concern, helical tiebacks/anchors may be used in conjunction with the piers. These are installed horizontally to provide additional stability against sideways movement.
Why Choose Helical Piers?
- Stability: Provides long-term stability by transferring the pool's weight to stable soil.
- Minimal Disruption: Installation is relatively quick and causes minimal disruption to the surrounding landscape compared to other methods.
- Versatility: Can be used in various soil conditions.
- Cost-Effective: Often more cost-effective than complete pool replacement.
Important Considerations:
- Professional Assessment: It is crucial to consult with a qualified geotechnical engineer and a pool repair specialist to assess the situation and determine the best course of action. DIY attempts to level a sinking pool can be dangerous and may cause further damage.
- Permits: Check with your local building department for any necessary permits before starting any repair work.
- Drainage: Address any underlying drainage issues that may be contributing to the problem to prevent future sinking.
- Pool Type: The type of pool (inground concrete, vinyl liner, etc.) and its construction will influence the repair approach.
In summary, leveling a sinking pool is a complex undertaking that typically requires professional expertise and specialized equipment to install helical piers and potentially helical tiebacks to provide a stable foundation and prevent further settlement.
