Southern Dredging and Marine can provide you with GeoTextile Tubes and Bags for your next project. Our services include the installation of the bags to receive the spoils from dredging, or to be used for erosion control or shoreline protection. Contact us to learn more.
Deploying & Connecting the Tubes or Bags
After installing the drainage media, measure the width of the dewatering cell and mark the location of the center of each tube unit. Position the first unit such that the center of the roll is centered at the designated mark. Unroll the tube from the core.
After placing, the tubes should be anchored for initial filling by means of the side loops on the tube. Anchor stress must be alleviated after tube begins to fill. If needed, sandbags may be used to keep tube from being blown out of position.
Size the discharge lines coming from a dredge or pump so that the flow inside of the line is at a speed to keep the pipe full and prevent settlement of solids. Lay the lines straight whenever possible and minimize the amount of elbows and T’s to prevent clogging inside the discharge line. Connections should be equal to the diameter of the discharge line. The pressure in the discharge line should not exceed 6 psi when the flow is going into the one or multiple dewatering units. The warning tag on each tube refers to the maximum allowable gallons per minute to that tube.
For dewatering applications with low percentages of sand, adding polymers will help increase dewatering, improve effluent quality, and achieve higher percentage solids in the dewatered sludge. For projects with multiple dewatering tubes, a manifold system may be used to distribute the sludge to fill one unit at a time or multiple units at a time. The manifold should be constructed using either “T’s” or “Y’s” fittings and valves. Create a start up and daily checklist to follow throughout the operation, before the starting the project. Check for leaks in the piping and connections.