| DESCRIPTION | |||||||||
|
|||||||||
| The double Polycan liners (geomembranes) can be reinforced, non-reinforced, films or laminated products depending on the end use application. There are a variety of geomembranes available, including specialty grades. | |||||||||
| Case History - US Steel | |||||||||
| Client U.S. Steel, Gary, Indiana Project Lining the sides of a lagoon to contain dredged material. Working Dates June-July, 1989 Synopsis In order to create additional ship-docking area, U.S. Steel dredged its Lake Michigan harbor. The dredged material contained solids which, once out of the lake, would not be allowed to re-enter. A logoon was created with lined sides, preventing horizontal seepage of solids into the lake, but allowing water to filter naturally through the bottom of the lagoon and clean itself before re-entering Lake Michigan. The 1200 foot dike with a slope of 34 feet required 43,000 square feet of surface covering, and included lined trenches at the top and bottom of the dike. Problems With Lake Michigan on one side of the dike and the lagoon on the other, the work area was limited to a 12 foot wide road, preventing the customary use of heavy equipment to install the 3000 lb. fabric rolls. In addition, a predictably strong lake wind created a significant uplift of the fabric. Solutions This project required the use of a staging area some distance from the project to cut pieces for precision fit. Pieces were carried to their final positions. Seams were welded at the site location with the patented hot shoe split wedge heat seal, which provided an inflatable air chamber for testing the completeness of the weld and for leakage. Significant use was made of sandbags for ballast to insure safety of workers from wind-thrown fabric, and to ensure appropriate fit of the cover. Materials Geomembrane-30 mil Dura-flex VLDPE |
|||||||||
|
|
