Case Study – Sealing and Stabilizing a Wood Seawall
When a homeowner noticed soil loss between their dock and walkway, they feared the walkway pavers would start to sink. The culprit? A leaking wooden seawall runs beneath the area, allowing soil to slip through into the water. To address this issue, Seawall Repair Network® contractor Panhandle Seawall and Infrastructure (PSI) was called in to seal the seawall, stop the soil loss, and secure the walkway. This case study demonstrates how modern techniques can effectively reinforce and stabilize wood seawalls.
Repair Materials
The primary repair material used was SW-RP1, a structural polymer foam. This eco-friendly product is NSF-certified to strict environmental standards. Moreover, SW-RP1 offers exceptional strength and durability once fully cured. In addition to SW-RP1, a hydrostatic pressure control system was installed. This system allows excess water to flow from the landward side into the ocean while at the same time preventing soil migration. These components work together to maintain soil stability and structural integrity.
Procedures
The repair process kicked off with a targeted injection of SW-RP1 into the supporting soil behind the seawall. This initial step served two purposes: stabilizing soil and sealing leaks directly beneath the walkway and dock. Next, the team expanded their efforts, treating approximately 80 feet of adjacent seawall. On day two, the focus shifted. The crew installed the hydrostatic pressure control system, creating dewatering channels through the wall and the newly formed SW-RP1 layer. This final step ensured effective management of future water buildup.
Results
The entire project was completed in just two days. As a result, the seawall leaks stopped completely. Additionally, soil loss ceased, ensuring the walkway’s security. Most importantly, the property owners were satisfied with the outcome. This efficient solution demonstrates the effectiveness of modern seawall repair techniques. Seawall repair contractors can provide long-lasting stability with durable structural polymers and a hydrostatic pressure control system. Furthermore, this approach is often more cost-effective and less disruptive than complete seawall replacement.