Gravity structure intended for a marine civil-engineering construction and associated manufacturing method

Patent metadata

Field	Value
Publication number	US-2016251815-A1
Application number	US-201615054867-A
Country	US
Kind code	A1
Filing date	Feb 26, 2016
Priority date	Feb 27, 2015
Publication date	Sep 1, 2016
Grant date	—

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.

First claim

What is claimed:

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.

2 . 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.

3 . 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.

4 . 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.

5 . The gravity structure according to claim 1 , comprising a removable platform.

6 . The gravity structure according to claim 1 , comprising a plurality of anchoring tie rods.

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.

8 . 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.

9 . 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.

10 . The manufacturing method according to claim 7 , comprising a step of filling with water an immersed internal part of the gravity structure.

11 . 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.

12 . 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.

13 . 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.

14 . 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.

Assignees

• Soletanche Freyssinet

Inventors

• Rabaron Vincent
• Combescure Etienne
• Coudry Michel

Classifications

• E02B17/02 Primary

  placed by lowering the supporting construction to the bottom, e.g. with subsequent fixing thereto · CPC title

• E02D27/525

  using elements penetrating the underwater ground (sinking work pieces E02D15/08, sinking caissons E02D23/02) · CPC title

• E02B2017/0056

  Platforms with supporting legs · CPC title

• E02D27/10

  Deep foundations · CPC title

• E02D27/50

  Anchored foundations · CPC title