Geotextile Tubes Dewatering
We dredge sand, silt, sludge into GeoTextile Tubes, dewateing the spoils once the tubes are filled. This method captures and contains the sludge from dredging and pumps directly into geotextile tubes. Previously, containing the sand, silt and sludge from the process of hydraulic dredging was to pump the material into a pre-built hole in the ground called a “cell” or pump into movable containers such as a barge, dump truck. Today, there are choices that include the GeoTextile Tubes and Bags, and there are many advantages and cost savings..
The first advantage of using GeoTextile Tubes is for reuse of the sand, silt, sludge or spoils after the GeoTextile bag or tube has dewatered. If sand has been dredged and pumped into the tube, then once the water has drained and evaporated, what is left is gorgeous sand ready to be reused for beach reclamation and refurbishing as well as new land reclamation. Silt can also be used after dewatering for creating or repairing land.
The second advantage of using GeoTextile Tubes or Bags is the fact that the dredging creates very little turbidity and disruption of the marine environment. The disturbed material is pumped directly into the bags rather than being thrown back into water or a cell. This is big! The environment is left intact with very little damage. Turbidity becomes a non-issue, great for the plant and marine life.
The only real disadvantage to using GeoTextile Tubes or Bags is the difficulty of the task is greater than just dumping the spoils into a hole or back into the water. It requires more man power, lots of stops and starts to realign the discharge pipes, and is much slower going. Dredging times will slow down and take a longer period of time to complete. However, dewatering is very rapid.