| 摘要 |
An apparatus for delivering liner material into a trench prevents sidewall collapse in a subsurface water saturated zone, provides for inspection of vertical joints, avoids the necessity for dewatering of an area to be trenched, and provides continuous rolls of liner material which are joined by vertical and horizontal seams to accommodate any length or configuration of placement. To initiate unrolling of a length of liner material, a roll of material is dropped into the installation apparatus which trenches into the subsurface. One end of the liner material is held in place by restraints and hydraulic presses. The roll is then unrolled by trenching backwards, cutting a trench and unfurling the roll in the formed trench.
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