# US 2019/0169834 A1 · Method For Lifting And Supporting A New Slab Foundation With Hydraulic Jacks > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0169834 A1 - Document ID: US20190169834A1 - Status: Published application - Kind: A1 - Application number: 15/883,155 - Filed: 2018-01-30 - Published: 2019-06-06 - Earliest claimed: 2017-02-06 - Assignees: Frederick S. Marshall; Benjamin S. Marshall - Inventors: Frederick S. Marshall; Benjamin S. Marshall - Web page: https://patentgrep.com/patent/US20190169834A1 ## CPC - E02D 7/20: Placing by pressure or pulling power - E04B 1/3511: {Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof} - E02D 27/02: Flat foundations without substantial excavation (E02D27/04, E02D27/08 take precedence) - E02D 27/12: Pile foundations - E04B 2001/3588: {using special lifting or handling devices, e.g. gantries, overhead conveying rails} - E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)} - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) ## Abstract A method for lifting and supporting above ground a concrete slab foundation employing hydraulic jacks includes installing piers in the ground, each with a pier extension protruding above ground. A lifting assembly is placed over each pier extension, the lifting assembly having a lift sleeve and upward extending lifting members. Then the slab foundation is poured, bonding a portion of the lifting assembly in concrete. After the slab foundation hardens, a jack is positioned on top of the pier extension, and lifting arms of the jack engage the lifting members. The jack is actuated to exert an upward force on the lifting assembly to lift the slab foundation above the ground. Then, the lift sleeve is rigidly secured to the pier extension, allowing the jack and lifting arms to be removed. ## Claims ### Claim 1 A method for lifting and supporting a concrete slab foundation above ground, comprising: installing a pier in the ground with a pier extension protruding above the ground; placing a lifting assembly over the pier extension, the lifting assembly having a lift sleeve and a plurality of upward extending lifting members; pouring the slab foundation, bonding a portion of the lifting assembly in concrete; positioning a jack on an upper end of the pier extension, and engaging lifting arms of the jack with the lifting members; actuating the jack to exert an upward force on the lifting assembly to lift the slab foundation above the ground; then rigidly securing the lift sleeve to the pier extension and removing the jack and the lifting arms. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: placing a seal between a lower end of the lift sleeve and the pier extension prior to pouring the slab foundation. ### Claim 3 (depends on 1) The method according to claim 1, wherein: pouring the slab foundation bonds the concrete of the slab foundation to the lift sleeve. ### Claim 4 (depends on 1) The method according to claim 1, wherein: the lifting assembly further comprises a base plate extending outward from a lower end of the lift sleeve, the base plate being movable with the lift sleeve; and pouring the slab foundation bonds the concrete of the slab foundation to the base plate. ### Claim 5 (depends on 1) The method according to claim 1, wherein rigidly securing the lift sleeve to the pier extension comprises welding the lift sleeve to the pier extension. ### Claim 6 (depends on 1) The method according to claim 1, further comprising: prior to pouring the slab foundation, placing barrier material around an upper portion of the lift sleeve; removing the barrier material after the slab foundation has hardened, defining a barrier cavity in the slab foundation around the upper portion of the lift sleeve, the barrier cavity providing access to an upper rim of the lift sleeve; and wherein securing the lift sleeve to the pier extension comprises welding the upper rim of the lift sleeve to the pier extension. ### Claim 7 (depends on 1) The method according to claim 1, wherein: the lifting assembly further comprises upward extending bolts; and rigidly securing the lifting assembly to the pier extension comprises: welding the lift sleeve to the pier extension; then removing the jack and placing an upper holding plate on the upper end of the pier extension, the upper holding plate having bolt holes that receive the bolts; and securing the bolts to the upper holding plate with nuts. ### Claim 8 (depends on 1) The method according to claim 1, wherein: the lifting assembly further comprises upward extending bolts; and rigidly securing the lifting assembly to the pier extension comprises: placing an upper holding plate on the upper end of the pier extension before lifting the slab foundation, the upper holding plate having bolt holes, the jack being positioned on top of the upper holding plate; aligning the bolt holes with the bolts and passing the bolts through the bolt holes as the slab foundation is lifted; and securing nuts to the bolts after insertion through the bolt holes in the upper holding plate. ### Claim 9 (depends on 1) The method according to claim 1, wherein: the lifting assembly further comprises upward extending bolts welded to an exterior of the lift sleeve; the lifting members comprise hooks welded to the exterior of the lift sleeve and circumferentially spaced from the bolts; rigidly securing the lifting assembly to the pier extension comprises: placing an upper holding plate on the upper end of the pier extension before lifting the slab foundation, and placing the jack on top of the upper holding plate, the upper holding plate having bolt holes that receive the bolts as the slab foundation is lifted and recesses that allow the hooks to pass through as the slab foundation is lifted; and securing nuts to the bolts after insertion through the holes in the upper holding plate. ### Claim 10 (depends on 1) The method according to claim 1, wherein: the pier extension comprises a solid shaft that is rectangular in transverse cross-section; and the method further comprises: placing a reinforcing sleeve over the solid shaft prior to installing the lifting assembly, the reinforcing sleeve having a cylindrical inner wall; then sliding the lift sleeve over the reinforcing sleeve; then after rigidly securing the lift sleeve to the pier extension, dispersing grout between the cylindrical inner wall of the reinforcing sleeve and the exterior of the solid shaft. ### Claim 11 A method for lifting and supporting above ground a concrete slab foundation, comprising: installing a pier in the ground with a pier extension protruding above the ground; providing a lifting assembly with a lift sleeve, a plurality of upward extending lifting members, and a plurality of upward extending bolts; pouring the slab foundation, bonding the base plate and the lift sleeve in concrete, the lifting members and the bolts having upper ends protruding above an upper side of the slab foundation; positioning a hydraulic jack on an upper end of the pier extension, and engaging lifting arms of the jack with the lifting members; actuating the jack to exert an upward force on the lifting assembly to lift the slab foundation above the ground to an upper position; inserting the upper ends of the bolts through bolt holes in an upper holding plate on the upper side of the slab foundation and securing nuts to the upper ends of the bolts; then removing the jack and the lifting arms. ### Claim 12 (depends on 11) The method according to claim 11, wherein the upper holding plate is placed on the upper side of the slab foundation after the slab foundation is in the upper position. ### Claim 13 (depends on 11) The method according to claim 11, wherein: the upper holding plate is placed on the upper end of the pier extension before the slab foundation is lifted; the jack is placed on top of the upper holding plate after the slab foundation is poured; and the upper ends of the bolts pass through the bolt holes in the upper holding plate as the jack lifts the slab foundation. ### Claim 14 (depends on 13) The method according to claim 13, wherein: the upper holding plate has a periphery with recesses formed therein; and upper portions of the lifting members pass through the recesses as the jack lifts the slab foundation. ### Claim 15 (depends on 11) The method according to claim 11, further comprising: placing a seal between a lower end the lift sleeve and the pier extension prior to pouring the slab foundation. ### Claim 16 (depends on 11) The method according to claim 11, wherein: the pier extension comprises a solid shaft that is rectangular in transverse cross-section; and the method further comprises: placing a reinforcing sleeve over the solid shaft prior to installing the lifting assembly, the reinforcing sleeve having a cylindrical inner wall; sliding the lift sleeve over the reinforcing sleeve; and dispersing grout between the cylindrical inner wall of the reinforcing sleeve and the exterior of the solid shaft after the slab foundation is in the upper position. ### Claim 17 A method for lifting and supporting above ground a concrete slab foundation, comprising: installing a pier in the ground with a solid shaft protruding above the ground, the solid shaft being rectangular in cross-section; sliding a reinforcing sleeve over the solid shaft prior to installing the lifting assembly, the solid shaft and the reinforcing sleeve defining a pier extension, the reinforcing sleeve having a cylindrical inner wall; placing a lifting assembly over the reinforcing sleeve, the lifting assembly having a lift sleeve and a plurality of upward extending lifting members, the lift sleeve sliding over the reinforcing sleeve; pouring the slab foundation, bonding a portion of the lifting assembly in concrete; positioning a jack on an upper end of the pier extension, and engaging lifting arms of the jack with the lifting members; actuating the jack to exert an upward force on the lifting assembly, sliding the lift sleeve upward on the reinforcing sleeve until the lifting assembly and the slab foundation are in an upper position; rigidly securing the lift sleeve to the pier extension and removing the jack and the lifting arms; and dispersing grout between the cylindrical inner wall of the reinforcing sleeve and the exterior of the solid shaft after the slab foundation is in the upper position. ### Claim 18 (depends on 17) The method according to claim 17, wherein: the lifting assembly further comprises upward extending bolts; and rigidly securing the lifting assembly to the pier extension comprises: placing an upper holding plate on an upper end of the pier extension after the slab foundation is in the upper position, the holding plate having bolt holes that receive the bolts; and securing nuts to the bolts. ### Claim 19 (depends on 17) The method according to claim 17, wherein: the lifting assembly further comprises upward extending bolts; rigidly securing the lifting assembly to the pier extension comprises: placing an upper holding plate on the upper end of the pier extension before lifting the slab foundation, and placing the jack on top of the upper holding plate, the upper holding plate having bolt holes that receive the bolts as the slab foundation is lifted; and securing nuts to the bolts after insertion through the holes in the upper holding plate. ### Claim 20 (depends on 17) The method according to claim 17, wherein: the lifting assembly further comprises upward extending bolts welded to an exterior of the lift sleeve; the lifting members comprise hooks welded to the exterior of the lift sleeve and circumferentially spaced from the bolts; rigidly securing the lifting assembly to the pier extension comprises: placing an upper holding plate on an upper end of the pier extension before lifting the slab foundation, and placing the jack on top of the upper holding plate, the upper holding plate having bolt holes that receive the bolts and recesses that allow the hooks to through as the slab foundation is lifted; and securing nuts to the bolts after insertion through the holes in the upper holding plate.