During winter, low tides can contribute to an imbalance of hydrostatic pressure on the seawall, with the water in the soil on the landward side applying pressure without enough water on the other side to balance it off. Pressure control systems are essential during this time for managing the heightened pressure levels and preserving the integrity of the seawall.
Qualified contractors install a hydrostatic pressure control system in three steps: polymer injection, channel drilling, and filter insertion. Once installed, the system works very efficiently to manage hydrostatic pressure.
The Three Key Steps
Polymer Injection: Stabilization of Soil
Rainfall and other factors can exacerbate soil instability on the landward side of the seawall. Injecting a specialized polymer fortifies the supporting soil behind the seawall.
Drilling Channels: Strategic Locations
Channels are drilled through the seawall and the stabilizing polymer layer at strategic locations. These channels are essential for the subsequent insertion of pressure release filters.
Inserting Pressure Control Filters: Automatic Regulation
Finally, pressure control filters with one-way valves are inserted. These valves allow water to flow from the landward side, through the wall, to the waterward side without taking crucial supporting soil along. The soil stays on the landward side, where it is needed for support, and the water moves through the wall instead of creating undue pressure on the structure.
Action Items
If You Don’t Have a System Installed
If your seawall lacks a pressure release system, winter is a critical time to consider installing one. Consult with a qualified seawall repair contractor to ensure that the system is tailored to your property’s needs.
If You Already Have a System
If a system is already in place, winter is the ideal time for an inspection to assess its adequacy. If your system doesn’t meet the challenges posed by winter tides, an upgrade may be necessary.
Key Takeaways
- Addressing hydrostatic pressure imbalances during winter’s low tides is crucial for seawall longevity.
- A functioning hydrostatic pressure release system can play a pivotal role.
- For those without a system, now is the time to install one.
- For those who already have one, a winter inspection can help determine if your seawall is optimized for low tides.