When we were notified of the need to repair leaking bulkhead joints at Stennis Space Center in south Mississippi, Helms Polyfoam sought to tackle the problem head on.  After submitting the winning bid to conduct the repair, we immediately began putting our plan into action to solve the problem. 

Weakened joint seals in the concrete bulkhead near the main engine test stand was allowing the infiltration of water to erode the soils beneath the parking/loading dock area.  This erosion caused voids to form beneath the concrete, resulting in an unstable environment for heavy traffic.  To mitigate this situation, Helms Polyfoam sealed the joints beginning below the mudline and working upward to above the waterline. This mitigated the inflow of water and prevented soils from being carried out through the leaking joints. 

Employing our deep-injection methods and utilizing our single component, permeating, polyurethane resin, HPF trained technicians injected along each wall joint, beginning below the mudline and working upward to just above the waterline.  This process created a “curtain wall” behind the bulkhead, sealing each joint and stabilizing the unconsolidated soil,forming a water impermeable barrier to ensure the soil around each joint was kept in place mitigating soil loss along the length of the bulkhead. A total of 29 wall joints were treated ranging in depth from 10’ up to 30’.