Trapped water buildup behind seawalls leads to damaging hydrostatic pressure. Uncontrolled, this pressure can displace sections of the wall or cause cracking over time. Here we’ll explore an integrated solution for permanently regulating this pressure.
Hydrostatic Pressure Release System
An effective approach is to install a hydrostatic pressure release system directly into the seawall. This involves three key steps:
- Injecting a specialized polymer behind the seawall to solidify and stabilize the soil. This forms a supportive medium.
- Drilling release channels through the seawall and polymer at strategic locations.
- Inserting a pressure release filter into each channel. These valves automatically regulate the passage of water to equalize hydrostatic pressure, without letting soil escape from the landward side into the water.
With the polymer stabilizing the earth and the release filters controlling water flow, this system reliably relieves pressure and prevents further erosion or seawall damage.
How the Pressure Release System Works
The first step stabilizes the soil medium behind the wall so it can accommodate the release channels without eroding. A specialized polymer (Seawall Repair Network®’s SW-RP1) injected into the soil cures into a solid matrix. This bonds soil particles together, preventing future erosion or voids.
The release filters inserted into the channels consist of a one-way valve that freely allows water to pass from the soil side to equalize excess pressure against the seawall. However, the valve blocks soil from passing through. This allows regulation of hydrostatic pressure without compromising the soil on the landward side.
Benefits of a Proactive Approach
Being proactive about relieving hydrostatic pressure can add decades of life to your seawall for a fraction of the replacement cost. It also prevents further damage to the seawall itself, avoiding an exponentially more expensive rebuild. This system provides stabilization without the need to excavate or disrupt landscaping behind the wall.
By tackling water buildup issues early, homeowners can avoid emergency erosion situations down the road. Investing in your seawall’s longevity protects property values and minimizes the odds of larger expenses later on.