Modular vertical shoring system with cylindrical interconnected sleeves

Abstract

Cylindrical, interconnected stacked vertical sleeves provide a vertical pit (or shaft shoring system) for use in subterranean construction projects. Large-diameter, interlocking fiberglass, plastic, or polymeric sleeves have an interlocking portion at the top and a second interlocking portion at the bottom, which allow sleeves to be safely and securely seated upon each other to build the vertical pit up to 20 feet deep. Lifting rings on the interior wall of the cylinders allow lifting, placement, and removal by a crane or other piece of heavy lifting equipment.

1 . An assembled shoring structure for pit and shaft shoring comprising: a plurality of stackable shoring sleeves to assemble vertically and lower into a shoring structure in an excavated hole in the ground, each of the shoring sleeves fabricated of light weight heavy duty material and each having a series of lifting rings on an interior surface for ease of lifting and installing using external lifting machinery, each of the shoring sleeves comprising a cylindrical structure having a bottom outer ring to mate with and overlap a top inner ring of an adjacent lower cylindrical structure in a vertical stacked array lowered into the hole to provide a rapidly installed and rapidly removed safe in-ground working environment. 
     
     
         2 . The assembled shoring structure of  claim 1  comprising a plurality of assemblies of modular mating cylindrical shoring sleeves, each of the assembly comprising a different diameter and different height series of mating cylindrical sleeves for different work environment requirements. 
     
     
         3 . The assembled shoring structure of  claim 1  wherein the lightweight heavy duty material comprises at least one of the lightweight heavy duty materials taken from the list of lightweight heavy duty materials comprising synthetic material, a polymeric material, fiberglass, plastic, a combination of fiberglass and plastic, aluminum, wood, light weight steel, rubber, and a composite of fiber. 
     
     
         4 . The assembled shoring structure of  claim 1  wherein the lifting rings comprise a series of steel rings pivotally secured to a series of horizontal rings spaced around an interior surface of the cylinder so that each of the rings pivots vertically and the series of steel rings receive a series of hooks from elongated flexible lifting members from a powered lifting device for installing and removing the shoring sleeves.