| 摘要 |
A process for the lagging of walls and ceilings (11) in rock spaces (10) (road tunnels or the like) with reinforced canvas material (21) is employed for a canvas which is adapted to divert water from ceilings and walls to a drainage ditch at the lower edge of the wall. Eye bolts are fixed in rows in walls and ceilings (11) in the rock space (10) at a set distance, conforming to the breadth of the canvas piece (21). Thereafter associated wires are threaded through the eyes of the bolts and the wires are fastened via stays or similar fastening means in or at the drainage ditch. The canvas pieces (21) with associated grommets and cordage are thereafter fastened to tensioned wires, while the joint between canvas pieces (21) is overlapped with a canvas strip to form a liquid-tight seam. Each canvas piece (21) - at least at the ceiling of the rock space - is placed with the side facing towards the interior of the rock space against a convexly folded or curved support means (30) between the opposite longitudinal edges of the piece of canvas. The support means (30) is connected and/or fixed at opposite ends to their respective fastening bolts at opposite edges of the canvas piece. Thereafter the canvas piece is drawn out in opposite directions longitudinally across the support means via associated cordage and wires. A system for use in the lagging of walls and ceilings in rock spaces comprising a support means in the form of a bow (30) folded or curved into an obtuse angle, which is provided at opposite ends (31,32) with fastening means for fixing into their respective separate fastening bolts (36, 37) for the support of the bow in a convexly upwardly arched support position. |
