WO1990008059A1 - Floating modulate concrete platform - Google Patents

Abstract

Invention Patent Floating Modulate Concrete Platform, refer it the conception of a floating platform constituted by assemble of several hexagonal modules with stiffiness walls between opposite vertex, joined by prestressed cables in the enlargement spaces to do it. It fixation in operation place will be obtained filling the platform with water sea and helped by cables and anchors. The hexagonal modules will give the structural stiffiness and the water the necessary mass. The platform will can have a big work area and stay at some depth sea.

Description

REPORT DESCRIPTIVE OF PATENT INVENTION " FLOATING MODULATE CONCRETE PLATFORM "

The present invention refered about a rein-forced concrete platform, constitutive by several modules in association, that after joined among thenselves, will be create a plane surface, that would be used by platform oil exploration, base to extraction of minerals in depht sea, naval base, airport, etc..

It intend basicaly, to show how can conceived and builted a concret platform, like a artificial floating island, which utilities and aplications, will depend it economical viability. It consider, soon or later, there will be necessity explored marines riches, this invention is a possible alternative, that in brasilian case off shore exploration oil could be utilized to depht water, greater than 500 meters.

The platform construction will be made by hexagonal modules width stiffiness walls between opposite vertex. The modules will be constructed at the coast and transported to point where it wish to have the platform location.

It understand by stiffines walls between oposite vertex, vertical walls that crossing all module were conected at it center. The figure 1 shows an horizontal cross section where can see the walls st iff iness between oposite vertex.

The figure 2 shows the vertical croos section in hexagonal module.

While some modules were constructed and transported to final position on the sea, they were going conected by prestressed tie-beans, in order to, soon after tensioned to confer whole the stiffiness necessary.

The figure 3 shows the module being transported.

The modules conection by prestressed tie-beans will be localized at edge enlargement space and internal stiffiness walls.

The figure 4 shows detail of prestressed tie-beans conection between modules.

Afterwards it has so great wish or necessary the modules will be partially filled with water sea, so as to increase the platform greatest inertia, and so that, most economical.

The figure 5 shows the horizontal cross section platform.

The figure 6 shows a platform assembled by several modules.

Finaly will be instaled anchors that will be fix the platform in it work place.

Observe that the anchors instalation is to help the platform fixation. Because the water sea in the platform is to increase the inertia, in this manner, to dificult the efects of waves displacements.

The anchors for platform will be concrete reinforced blocks will be arrested at platform by cables.

The figure 7 shows the cross section where can see the fixation cables and the block to anchors.

There were many kinds platforms, some suported in bed sea, other were floating, also there are the floating platform fixed by cables. There are several platforms formed by assembly small modules too.

The new in this platform conception, is that, it is not fixed only by cables. How the platform can increase how much we want, it almost immobility will be reached by big mass obtained with filling up water sea.

Another new characterist is the hexagonal modules conception with stiffinees walls between oposite vertex. When they will be conected by prestressed, they were formed a set of beans crossing depht sea. The platforms suported by bed sea are limited by profundity, in tension leg platforms the tie-beans are tensioned to keep the platform in operation place, none takes it weight own to help in the fixedness, leaving for cables and anchors a small drag force because wave efects. How they are small a feel cables will be necessary.

Claims

1 - "Floating Modulate Concrete Platform", it characterize by platform construction using hexagonal modules with stiffiness walls between oposite vertex; by to have modules conected by prestressed cables, localized in enlargement space stiffiness walls and modules faces, using some one prestressed system and, by obtainment inertia necessary to fix it, filling partialy the modules interior water sea. 2 - "Floating Modulate Concrete Platform", acording claim 1 , it characterize by to be fixed in operation place because has a large inertia and helped by cables joined at anchors, to be contained a smaller part in the platform fixation. That is, the platform will has so big inertia that will remain a small force for cables and so there were fell cables.

3 - "Floating Modulate Concrete Platform", acording claim 1 , it characterize by big stiffiness a whole set represented by beans that will be creat in the structure crossing at 60 degrees. The stiffiness of a whole set is warranted by modules geometry. It being hexagonal, always allow to profile a stiffiness wall and two lateral faces other modules and each union point. This situations also appear at 60 degrees between thenselves, from that mode whem the union cables will be prestressed, the hexagonal modules vertex will compress between itself, to coming back the structure with isotropical stiffiness and warranting a monolitical set.

4 - "Floating Modulate Concrete Platform", acording claims 1 and 2, it characterize by to stay fixed in the operation local because has big inertia and helped by cables and anchors.

5 - "Floating Modulate Concrete Platform", acording claims 1 and 3, it characterize by big stiffiness of whole set represented for it stifiness walls and for large homogeneity confered union kind, that is, cross and prestressed.

6 - "Floating Modulate Concrete Platform", acording claims 1, 2, 3, 4 and 5 it characterize by creation of a large distribuited floating mass, so that the hydrodinamical forces had small efectes against it stiffiness and mass.

7 - "Floating Modulate Concrete Platform", acording claim 1 , characterize by fact to be constructed of reinforced concrete modules at coast and shaped using prestressed concrete tecnical in definitive operation place.

8 - "Floating Modulate Concrete Platform", acording claims 1 and 3, though constitutive by modules, characterized it, by possess a union that makes it a monolitical, can be considered like single whole after mounted.

9 - "Floating Modulate Concrete Platform", acording claim 1 , characterize by utilization of reduces th ikness walls, that work like plates under water sea pressure. The walls will be dimensioned using thin plate theory because filling the modules with sea water the internal pressure alleviate the external, this is other motive to fill the modules: to make the structure to get hydrostatical forces with usual dimensions in theory of structures.