3.1 Transportation and On-site Storage

The drainage net and geocomposite rolls shall be wrapped in a plastic cover. The drainage net and geocomposite rolls shall be shipped to the job site in a manner not to damage the rolls. The rolls shall be stored on wooden pallets or other means at elevated ground away from dirt, mud, and excessive heat.

3.2 Method of Placement

The subgrade shall be free of foreign and organic material, sharp objects, or debris of any kind, which could potentially damage the geocomposite. The rolls shall be deployed using a spreader bar assembly attached to a loader bucket or by other methods approved by the project engineer. On side slopes, the rolls shall be deployed in the general direction of the maximum slope. The deployment equipment shall not damage the underlying subgrade or geosynthetics. A smooth rub sheet may be needed for installation of the geocomposite over a textured geomembrane. The rub sheet is placed between the geocomposite and the textured geomembrane to prevent damage to geocomposite during positioning. The rub sheet is removed after deployment. Drainage net and geocomposite shall be placed and secured in an anchor trench as shown on the project drawings. Sandbags shall be placed on leading edges of the panels to prevent wind uplift. An extra layer of drainage net or geocomposite may be required at the intersection of any two sideslopes to cover the area where the panels are staggered.

3.3 Field Seaming

Drainage net panels shall be overlapped by a minimum of 2 inches. Non-black plastic ties shall be used at 5 feet intervals in the direction of the roll length and at 2 feet intervals across the end of the panel to tie the drainage net panels. Metallic ties shall not be allowed. On slopes, the spacing of ties across the roll end shall be 6". The geotextile flaps of the adjacent panels shall be heat-bonded or sewn on all sides in accordance with the project specification. The geotextile flap of the upper panel shall overlap the geotextile flap of the lower panel.

3.4 Cover Material

The drainage net and geocomposite shall be covered as soon as possible. The covering operation shall not damage the drainage net or the geocomposite. The cover soil material shall be free of foreign and organic material, sharp objects, or debris of any kind, which could potentially damage the geocomposite. No construction equipment or machinery shall operate directly on the geocomposite. The use of lightweight machinery (i.e. generator, etc.) with low ground pressure is allowed.

3.5 Repairs

All panels shall be inspected for damage. Any damaged area shall be repaired by a patch of the same material extending one foot beyond the edges of the damaged area.