Case Studies
Ground Stabilization Work on Reclaimed Land for a New Airport Runway
Ground stabilization work is underway by DCM (Deep Cement Mixing) on land reclaimed for a third runway at Hong Kong International Airport. The job is employing a work barge outfitted with a mixing plant. The mixing plant is supported by a storage tank for holding seawater, two filtration tanks for filtering wash water after plant washdowns and a sedimentation tank for processing the filtered wash water.
Several of Tsurumi's submersible construction dewatering pumps and seawater-resistant pumps are being used as a part of operating this equipment.
Tsurumi's KTZ43.7 and KTZ411 seawater-resistant pumps (3 total) are being used to pump seawater to the storage tank and from the storage tank to the mixing plant.
The mixing plant needs to be washed down periodically. The wash water from that is pumped to two filtration tanks and, after filtering, to a sedimentation tank. Three of Tsurumi's KTZ32.2 submersible construction dewatering pumps are being used to move the wash water.
Besides the KTZ pumps, an HS2.4S single-phase portable drainage pump is used on board the work barge to discharge rainwater from the pit and leftover drainage. By discharging this water, this pump is preventing seepage to lower decks.
These pumps have been highly lauded for not breaking down and especially the seawater-resistant pumps for not rusting.
The seawater-resistant pumps used in this example are standard specification pumps that can be easily modified with Tsurumi's seawater-resistant kit consisting of a galvanic anode and seawater-resistant special cast iron impeller. The kit is designed to enable about two years of use in seawater. (The service period depends on operating conditions.)
Specifications of Installed Equipment
| Installed Equipment | Specifications |
|---|---|
| Seawater-Resistant Pumps | Model : KTZ (seawater-resistant version) |
| Dewatering Pumps | Model : KTZ |
| Portable Dewatering Pumps | Model : HS2.4S |
