Mix and pump 6,100 cu m of grout (comprising cement, sodium silicate and sea water) from a DSV with a confined deck space into 17 under base compartments via a manifold control panel to an extensive piping system in a continuous 72 hour period.
THE CHALLENGES
PREPARATION
A conventional mixing and pumping system was developed that had the required capacity but was also able to be transported by conventional road and sea freight methods. 100% immediately operational contingency equipment was also required. The functionality of the system was dependent upon an RJM having a mix tank of the correct size to ensure the vortex action was maintained. This was critical to the efficient mixing of the seawater, cement and silicate in sufficient quantity to meet the demands of the high capacity delivery pumps in a continuous operation.
OUTCOME
The under base grouting operation was successfully completed within 60 hours utilising the primary equipment and two operating crews. No downtime or injuries were sustained.
