Side loaded remediation method and apparatus for reinforced concrete pilings
AssigneeBasalt World Corp.
InventorDonald R. Smith
Life of this patent
Estimating the term…
Abstract
A method of rehabbing reinforced concrete pilings while in service and without the requirement to demo or otherwise gain access over the ends of an existing column. Design adopts modern environmentally responsible fiber reinforced polymer rebar and other FRP stirrups uniquely shaped into spiral sections requiring only side access for placement, designed to permanently encase the piling with a totally non-rusting non-metal reinforcement lateral containment cage featuring preformed circumference stirrups that mechanically interlock vertically and lateral adjustability to control density. The spiral stirrups extending fully 360-degrees around an existing piling with an additional overlap of at least 45 degrees.
Claims14
A method of rehabbing a steel reinforced concrete (RC) piling comprising the steps of:
- cutting a plurality of fiber reinforced polymer (FRP) longitudinal rebars to a predetermined length and vertically position and loosely secure said FRP longitudinal rebars with a tie around an existing RC piling to be rehabbed;
- create a new or remediate the existing RC piling using a plurality of preformed FRP wraps, position the first preformed FRP wrap around said FRP longitudinal rebars in the shape of spiral stirrups to form a full 360 degree lateral containment cage each with a male and female end, beginning with a male end down, a plurality of said FRP wraps are placed around said FRP longitudinal rebars with each FRP wrap providing an uncut continuous circumference wrap of at least 360 degrees with overlap covering up to 450 degrees around the existing RC piling and rotating said spiral stirrup wrap into a parallel alignment with the existing RC piling and roughly aligning notches of each spiral stirrup to position and evenly space apart said FRP longitudinal rebar;
- vertically positioning each male and female end of each said FRP wrap and tying each FRP longitudinal rebar to the alignment notches preformed into each said spiral stirrup FRP wrap;
- continue adding lateral containment spiral stirrup sections formed by said FRP wrap as required to achieve the desired density of stirrup containment then continue in linear directions by connecting male and female insertion end spaced apart from a receptacle end assemble wrap end to end to straddle around said FRP longitudinal rebar at a position at the center of each splice wherein said FRP longitudinal rebar is constructed and arranged to operate as a joint locking pin;
- placing a two-piece form constructed of plastic around said FRP longitudinal rebars and said FRP wraps;
- and
- filling said form with liquid concrete and allowing said liquid concrete to solidify.
Dependencies are inferred from the claim text.