# US 2016/0251815 A1 · Gravity structure intended for a marine civil-engineering construction and associated manufacturing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0251815 A1 - Document ID: US20160251815A1 - Status: Published application - Kind: A1 - Application number: 15/054,867 - Filed: 2016-02-26 - Published: 2016-09-01 - Earliest claimed: 2015-02-27 - Assignees: Soletanche Freyssinet - Applicants: Soletanche Freyssinet - Inventors: Vincent RABARON; Etienne COMBESCURE; Michel COUDRY - Web page: https://patentgrep.com/patent/US20160251815A1 ## CPC - E02B 17/02: placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto - E02B 17/025: {Reinforced concrete structures (E02B17/021 takes precedence)} - E02D 7/22: Placing by screwing down {(screw piles per se E02D5/56)} - E02D 27/10: Deep foundations - E02D 27/50: Anchored foundations - E02D 27/525: {using elements penetrating the underwater ground (sinking work pieces E02D15/08, sinking caissons E02D23/02)} - E02B 2017/0039: {Methods for placing the offshore structure} - E02B 2017/0056: {Platforms with supporting legs} - E02B 2017/0069: {Gravity structures} - E02B 2017/0091: {Offshore structures for wind turbines} - E02B: HYDRAULIC ENGINEERING (ship-lifting E02C; dredging E02F) - E02D: FOUNDATIONS; EXCAVATIONS; EMBANKMENTS (specially adapted for hydraulic engineering E02B); UNDERGROUND OR UNDERWATER STRUCTURES {(tunnels, tunnelling, mining E21)} ## Abstract The subject matter of the invention is a gravity structure intended for a marine civil-engineering construction, comprising a slab configured so as to be placed on a sea bed and secured to a shaft directed in a principal direction substantially orthogonal to said slab, characterized in that the gravity structure comprises at least one anchoring tie rod extending in said shaft and in the slab, the gravity structure being configured so that, in a service position of the gravity structure, said at least one anchoring tie rod is anchored in the sea bed. ## Claims ### Claim 1 A gravity structure intended for a marine civil-engineering construction, comprising: a slab configured so as to be placed on a sea bed and secured to a shaft directed in a principal direction substantially orthogonal to said slab, characterized in that the gravity structure comprises at least one anchoring tie rod extending in said shaft and in the slab, the gravity structure being configured so that, in a service position of the gravity structure, said at least one anchoring tie rod is anchored in the sea bed. ### Claim 2 (depends on 1) The gravity structure according to claim 1, in which the shaft comprises an end opposite to the slab, and in which said at least one anchoring tie rod extends from the end opposite to the slab in the shaft. ### Claim 3 (depends on 2) The gravity structure according to claim 2, the gravity structure comprising at least one tube for guiding said at least one anchoring tie rod extending from the end opposite to the slab into the slab. ### Claim 4 (depends on 3) The gravity structure according to claim 3, in which the shaft is hollow and comprises a column and a conical base, each guide tube being disposed in a longitudinal wall of the column and in open air in the conical base. ### Claim 5 (depends on 1) The gravity structure according to claim 1, comprising a removable platform. ### Claim 6 (depends on 1) The gravity structure according to claim 1, comprising a plurality of anchoring tie rods. ### Claim 7 A method for manufacturing a gravity structure intended for a marine civil-engineering construction, using a slab configured so as to be placed on a sea bed and secured to a shaft directed in a principal direction orthogonal to said slab, the manufacturing method comprising: a step of placing at least one anchoring tie rod so that said at least one tie rod extends in the shaft and in the slab, the gravity structure being configured so that, in a service position, the anchoring tie rod is anchored in the sea bed. ### Claim 8 (depends on 7) The manufacturing method according to claim 7, in which the step of placing said at least one anchoring tie rod is preceded by a step of placing at least one tube for guiding said at least one anchoring tie rod extending from an end of the shaft opposite to the slab, as far as the slab. ### Claim 9 (depends on 7) The manufacturing method according to claim 7 comprising: a step prior to the steps of placing the tie rod, comprising a step installing the slab on a sea bed, the shaft being erected in a vertical position. ### Claim 10 (depends on 7) The manufacturing method according to claim 7, comprising a step of filling with water an immersed internal part of the gravity structure. ### Claim 11 (depends on 8) The manufacturing method according to claim 8, in which the step of placing said at least one anchoring tie rod comprises a step of installing a removable platform at an end of the shaft opposite to the slab. ### Claim 12 (depends on 8) The manufacturing method according to claim 8, comprising a step of drilling with a drilling tool disposed in said at least one guide tube, during which the drilling tool hollows out a hole in the sea bed, and then the tie rod is introduced into the guide tube and into the drilled hole. ### Claim 13 (depends on 12) The manufacturing method according to claim 12, in which the step of placing said at least one anchoring tie rod comprises a step of anchoring said at least one anchoring tie rod during which the drilling hole is the subject of an injection of grout. ### Claim 14 (depends on 11) The manufacturing method according to claim 11, in which the step of placing said at least one anchoring tie rod comprises a step of tensioning said at least one anchoring tie rod performed at a top anchoring.