Patent ID: 9127430
Filing Date: 2015-09-08
Classification: E02D

Abstract:
1. A method for raising manhole castings comprising: providing a hole in the pavement base surface to which pavement is to be applied around a manhole casting, said hole extending down to the top opening in the manhole; providing a flexible corrupted sleeve which is taller than the required distance between the top opening in the manhole and the level at which the casting and manhole cover are to be finally located, but which is sufficiently flexible in a vertical direction that when a casting is located in the top of the sleeve, the sleeve compresses downwardly, and which is sufficiently stiff in a lateral direction that it does not collapse inwardly when backfill is packed in and around the exterior of the sleeve; said sleeve including a bottom annular flange projecting outwardly from the sleeve a short distance up from the bottom end of the sleeve defining a bottom projection which projects below said bottom annular flange: and a top annular flange projecting outwardly from the sleeve a short distance from the top of the sleeve, defining a top projection which projects above said top annular flange: said bottom projection being dimensioned to fit into said top opening in said top of said manhole and said top projection being shaped to be inserted into said casting; providing a casting support which spans said hole for the manhole casting and rests on the pavement base surface; positioning said sleeve over the top opening in a manhole by inserting said bottom projection into said top opening until said bottom annular flange comes to rest against the top of said manhole around said opening; positioning a casting on the casting support; manipulating the casting support to lower the casting onto the top of the sleeve by lowering said casting over said top projection such that said top projection extends up into the opening in said casting, until said upper flange engages the bottom of the casting and continuing to lower the casting to compress the sleeve downwardly until the casting support rests on said pavement base surface; backfilling the hole around said sleeve and casting to about the level of the pavement base surface; then removing, the casting support and leaving the casting fixed in its final position by said back fill.