Submersible Platform With Blocked Thrust For Offshore Wind Plants In Open Sea In Concrete-Steel Hybrid Solution

Abstract

A tension-legged offshore submerged platform, in hybrid concrete-steel solution, having a pre-stressed concrete central body, a steel peripheral structure, which is connected to the central body through steel stiffeners, and further to a basement for such a platform.

1 . A tension legged offshore submerged platform for offshore wind plants in an open sea, in hybrid concrete-steel solution, comprising:
 a pre-stressed concrete central body, and   a steel peripheral structure, surrounding the central body and which is connected to the central body through steel stiffeners.   
     
     
         2 . The platform according to  claim 1 , further comprising:
 an anchorage system of the platform, which is anchored to a basement and includes a plurality of textile ropes, which are anchored downwards to the basement and extend upwards until they penetrate inside the central body, and   at least one tensioning system operating to modify a rope length and preloading the ropes themselves, said tensioning system being located at the top of cylindrical the central body.   
     
     
         3 .- 4 . (canceled) 
     
     
         5 . The platform according to  claim 2 , wherein the at least one tensioning system is provided above sea level. 
     
     
         6 . The platform according to  claim 2 , further comprising protection devices for protecting the textile ropes. 
     
     
         7 . The platform according to  claim 2 , wherein the basement is formed from pre-stressed concrete, including free volumes, which are pressurizable with air and floodable, such that the basement operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         8 . The platform according to  claim 7 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         9 . The platform according to  claim 2 , further comprising free volumes, which are pressurizable with air and floodable such that the platform operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         10 . Platform according to  claim 9 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         11 . The platform according to  claim 2 , wherein the at least one tensioning system is provided inside of the central body. 
     
     
         12 . The platform according to  claim 11 , wherein the at least one tensioning system is provided above sea level. 
     
     
         13 . The platform according to  claim 12 , further comprising protection devices for protecting the textile ropes. 
     
     
         14 . The platform according to  claim 13 , wherein the basement is formed from pre-stressed concrete, including free volumes, which are pressurizable with air and floodable, such that the basement operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         15 . The platform according to  claim 14 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         16 . The platform according to  claim 13  further comprising free volumes, which are pressurizable with air and floodable such that the platform operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         17 . Platform according to  claim 16 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         18 . The platform according to  claim 12 , wherein the basement is formed from pre-stressed concrete, including free volumes, which are pressurizable with air and floodable, such that the basement operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         19 . The platform according to  claim 18 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         20 . The platform according to  claim 12  further comprising free volumes, which are pressurizable with air and floodable such that the platform operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         21 . Platform according to  claim 20 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         22 . The platform according to  claim 11 , further comprising protection devices for protecting the textile ropes. 
     
     
         23 . The platform according to  claim 11 , wherein the basement is formed from pre-stressed concrete, including free volumes, which are pressurizable with air and floodable, such that the basement operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         24 . The platform according to  claim 23 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         25 . The platform according  claim 11 , further comprising free volumes, which are pressurizable with air and floodable such that the platform operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         26 . Platform according to  claim 25 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension. 
     
     
         27 . The platform according to  claim 1 , further comprising free volumes, which are pressurizable with air and floodable such that the platform operates as a semi-submerged pontoon for constructing the platform and for transporting the basement and platform from a building yard to an offshore site. 
     
     
         28 . Platform according to  claim 27 , wherein during installation of the platform at an offshore site, the platform remains anchored to the basement such that the platform is partially submerged by means of said textile ropes in tension.