WO2018054532A1

WO2018054532A1 - Structure for erecting on the surfaces of bodies of water, and method for erecting same

Info

Publication number: WO2018054532A1
Application number: PCT/EP2017/001112
Authority: WO
Inventors: Martin Daum
Original assignee: LEMPART, Marc-Alexander
Priority date: 2016-09-23
Filing date: 2017-09-19
Publication date: 2018-03-29
Also published as: DE102016011572A1

Abstract

The invention relates to a structure for erecting on the surfaces of bodies of water, in particular on open sea. The structure comprises at least one floatable tension leg platform-type bouyant body, which can be braced to the floor of the body of water by tensioning means acting opposite the buoyancy of the buoyant body, and at least one building which is arranged on the buoyant body. In particular, the aim of the invention is the erection of such a structure, said erection process being carried out as simply and inexpensively as possible. According to the invention, this is achieved in that the building is bouyant and can be arranged on the bouyant body in a floating state, wherein the building can be supported by a support structure of the bouyant body or can be braced to the bouyant body against the buoyancy of the building for example. The invention also relates to a method for erecting such a structure on open sea.

Description

Building for construction at water surface

and method of its construction

The invention relates to a building for construction on the surface of bodies of water, in particular on the open sea, comprising at least one floatable buoyancy body, which can be braced by means of counteracting its buoyancy effective tensioning means at the bottom of the body, and at least one building, which is arranged on the buoyancy body. The invention further relates to a method for constructing such a structure on the surface of waters, in particular on the open sea.

Buildings erected on the open sea are mostly wind turbines, but also television / radio towers, bridges - or more precisely: bridge piers - or the like. The installation of such structures on site currently takes place, usually by pouring a foundation on the seabed, on which a support platform is built, which in turn serves as a support for the respective building. This is particularly complex with increasing depth of water in terms of design and associated with a high expenditure of time, especially in the often prevailing on the high seas, adverse weather conditions high downtime must be calculated.

Moreover, it is known not to anchor on the open sea structures firmly by foundations or rigidly anchored to the seabed, but to provide a support platform for the building, buoyant floating body provided by means of appropriate clamping means, such as steel cables, thaw or .root or the like, so anchored to the seabed is that the buoyant body is pressed against its buoyancy force under water, so that it is braced against the seabed and thereby stabilized. The buoyant body itself usually consists of a plurality of interconnected hollow bodies and has after its tension against the seabed a predominantly horizontal extent. The establishment of such, also referred to as "Tension Leg Platform (TLP)" buoyancy is compared to a firmly anchored to the seabed platform much easier and cheaper, since the example modularly constructed buoyancy can be mounted on the one hand relatively easy and fast on the spot, on the other hand no The foundation supporting the entire structure, including supporting columns extending below the water surface, is required, but the fastening of the tensioning means on the seabed is achieved, for example, by means of relatively small foundations, by means of weights or by means of suitable bored piles (cf., for example, 10 2014 213 427 A1 or AT 88 806 A ) or the like can happen. In addition, their stability surpasses that of conventional semi-submersible boreholes with pontoons floating on the surface of the water, due to the buoyancy used for tensioning against the bottom of the water. DE 10 2013 222 081 AI describes, for example, intended for construction on the open sea structure, which makes use of such a floatable and tense against the water body buoyancy body in the manner of a "Tension Leg Platform". The building is, in turn, a wind power plant, which is firmly connected to the buoyancy body by means of corresponding support struts. As far as the construction of the actual building on the high seas is concerned, however, it is more or less independent of whether the building is fixed on a foundation firmly anchored to the water bottom or on a "Tension Leg Platform", as complex and expensive. The installation of the building on site is usually done with the help of mounting cranes, which take individual, possibly prefabricated and spent by ships to their construction site parts of buildings, such as mast elements of a wind turbine, and raise it to its mounting position, being in position by the mounting crane must be kept until they are completely fixed to each other, in particular screwed and / or welded. To load the ships, large, mobile telescopic or lattice boom cranes are used on land, which usually require special leveling / compaction of the soil. At the water special helicopters use, on which a corresponding crane is erected and which can be set by lowering supports on the seabed, so that the crane is stationary and independent of the sea state. It is obvious that the use of such cranes brings a considerable expenditure of time and money, which includes the delivery and delivery of the crane itself and its structure, which makes it necessary to use counterweights, for example, when erecting its jib. In addition, naturally strong winds or generally unfavorable weather conditions prevail at the construction site on the high seas, which does not apply exclusively to the erection of such structures in the offshore area. It may happen that for the intended location of the structure only a few months of a year provide the conditions for assembly. can. In contrast, however, the conventional construction of the building or the building on the respective "Tension Leg Platform" usually requires a few weeks and can easily be considerably extended by unfavorable weather conditions in which any work must be interrupted. The same applies to the case in which the structure to be erected on the floatable buoyancy body is not a wind power plant but, for example, a habitable building such as a research station.

EP 1 730 026 B1 describes a structure for the construction at the surface of waters which essentially comprises the following constituents:

- A main structure, which has at least one arranged above the water surface soil structure and a patch on top, habitable assembly;

- One or more carriers, which (r) below this

Main structure is arranged or are; and

- At least one mobile, buoyant dock with variable controllable buoyancy, the dock is equipped with a support platform, which is able to accommodate the soil structure of the aforementioned main structure.

In this way, the main structure should be able to be placed on the one hand above the water surface, when it has been placed on the supporting on the seabed straps; On the other hand, the main structure, when carried by the floatable docks, should be transportable so that it can be detached from the seabed as well as transported by means of the docks. The carriers can either be arranged detachably on the bottom structure of the main structure or rigidly attached thereto. The construction of such a structure also proves However, it is highly complex, with its main structure after its pre-assembly must first be spent on the buoyant dock so that it can be safely transported to the intended installation site. The length of the carrier must be more or less accurately adapted to the local water depth to set up the main structure of the dock on the carrier, which is also difficult, especially on the high seas, because the variable buoyancy of the docks is able to compensate only a relatively low height level without the main structure itself being at risk of becoming submerged or even flooded or slipping off the dock and sinking.

The invention has the object of providing a structure for construction on the surface of waters and a method for its construction of the type mentioned in a structurally simple and cost-effective manner to the effect that the above-mentioned disadvantages are at least largely avoided.

According to the invention, this object is achieved in a building of the type mentioned above in that the building in turn is floatable and can be arranged in the floating state on the buoyant body.

In procedural terms, the invention further provides a method of the type mentioned above, which comprises the following steps:

- providing at least one floating buoyancy body;

- Verspannen the buoyant body against its buoyancy at the bottom of the water by means of clamping means;

- providing at least one buoyant building; - launching the building and aligning it with respect to the buoyant body; and

- Arranging the floating building on the buoyancy body.

The invention is characterized in this respect by a complete departure from the prior art, as to be built on the buoyant, tense against the bottom of the water buoyancy building of the building, which, for example, a residential or office building, a hotel, a Research station or the like can act even floats and thus more or less completely pre-assembled on land, according to which it - whether on ships or especially in floating, towed by a ship state - spent the construction of the buoyancy body and in a very short Time must be aligned only with respect to the buoyancy body and arranged on this, which can be done for example in the ways explained below. The building can thus be a kind of "hybrid" after it has both the characteristics of a - not necessarily self-propelled - ship and a conventional building.

The buoyant building of the building according to the invention can be arranged in particular releasably on the buoyant body, it being possible, of course, also possible, the building insoluble, for example by welding, concreting or the like, inextricably connect to the buoyant body, after it with respect aligned with this and has been arranged on this. According to an advantageous embodiment, it may be provided that the buoyant body has a support structure complementary at least in sections to the outer contour of the building, on which the building is supported, in particular substantially in a form-fitting manner. In this case, the support structure can already be preassembled on the buoyancy body - be it detachable or inseparable - while ensuring, due to its complementary design to the outer contour of the building, that the building only has to be placed on the outer contour in order to support the latter in a supported manner , in particular form-fitting, to be worn.

In this context, the support structure of the buoyant body may, for example, comprise at least one support shell and / or at least one support ring on which or which the building is carried, wherein the support shell or the support ring, as mentioned above, in particular complementary to the outer contour of the building Inner contour has, which ensures a supported on the support structure of the building on the buoyancy body, without the additional fasteners are mandatory. However, such may of course be provided cumulatively, the support structure on the one hand and the building on the other hand, for example, complementary centering projections or recesses may have or aligned holes or the like may be provided over which the building, eg by means of bolts or the like, with The support structure can be connected after it has been placed on the support structure. The concrete design of the support structure must of course meet the static and dynamic requirements (in particular compared to wind loads and waves), but can basically be implemented in any known manner. For example, a plurality of, preferably at least three, or most preferably at least four, support posts has proved to be suitable as both a static and dynamically stable support structure, which extends obliquely outwards and downwards from the support ring serving to receive the building or from the support shell extend, advantageously distributed substantially equidistantly around the circumference of the support ring or the support shell and are connected at its lower end to the buoyant body, which in turn may have, for example, a substantially annular, preferably approximately annular, configuration.

With regard to an advantageous method for constructing such an embodiment of a building according to the invention, provision can be made, for example, for a buoyant body provided with a support structure complementary at least in sections to the outer contour of the building, which buoyancy element is lowered to a level, in particular by flooding it which the support structure is located entirely below the floating building, after which the building is aligned above the support structure and the buoyancy body, in particular by emptying it, is raised due to its buoyancy to a level at which its supporting structure is able to support the building. As will be described in more detail below, the floatable buoyancy body for this purpose may therefore preferably comprise one or more hollow bodies, which if necessary, for example by means of closable openings, at least partially filled with ambient water and, for example by means of suitable pumps, emptied again can. The building can be in its arranged on the superstructure body as desired entirely above the water surface, or it may also be partially disposed below the water surface, so that it experiences a certain buoyancy, which affects the load on the buoyancy body can diminish, so that the latter can be smaller, for example. In both cases, a stable arrangement of buoyant building on the buoyancy body, which performs no significant fluctuations due to its tension against the bottom of the water even at high seas, which consequently also applies to the resting on the supporting structure of the floating building.

According to another advantageous embodiment, it can be provided that the building in turn is clamped against the buoyancy body by means of cables which are more effective, in particular windable, on opposite to its buoyancy force. In this case, the building is consequently braced against the buoyant body in substantially the same manner as the latter against the bottom of the body of water, so that the building, in its condition on the buoyant body, is thus partly below the surface of the water, at such a level, on which it experiences sufficient to his tension against the buoyancy buoyancy.

In particular, although not necessarily, in the last-mentioned embodiment, provision can moreover be made for the building to be equipped with a drive which, on the occasion of its mounting on the buoyant body, enables it to be automatically aligned with respect to it or even move in the manner of a ship. fes so that it can optionally run between several, strained at the bottom of the water buoyancy bodies and "dock" to this. Such a drive may preferably one or in particular two motor-driven screws in the manner of conventional

Ship propellers include, which are arranged at a distance from each other on the buoyant building and expediently about an axis, in particular substantially perpendicular axis are pivotable, so that both translational and rotational movements of the building in the water can be performed easily and quickly. Alternatively, two or more screws may of course be stationary, i. not pivotable, may be provided on the buoyant building, with rotational movements of the building in the water, e.g. turning in place or passing through a curve, in the latter case can be achieved by different including opposite rotational speeds of the screws.

In order to improve the floating stability of the building, in particular on the occasion of the arrangement on the buoyant body, the building can of course also be provided with floating stabilizers, such as those known in the form of marine stabilizers (such as in the form of snake quills, fin stabilizers and the like). , In particular, the buoyant building can have at least one ballast tank or tank stabilizer which can be flooded or emptied with ambient water, so that a simple and fast alignment of the floating building in the vertical direction is possible by lowering its center of gravity by flooding the ballast tank is, and also a level reduction or Raising of the floating building is ensured by flooding or emptying the ballast tank. The ballast tank can basically be designed as a closed space on the lower side of the buoyant building, but it is preferably, for example by means of security locks, with the walk-in interior of the building of the connection in order to stand in the deflated state as additional usable space available.

With regard to an advantageous method for establishing ei ner such an embodiment of a building according to the invention with a contrary to its buoyancy effective tension of the building against the buoyancy body, for example, be provided that the buoyant body is braced at a level below the water surface against the bottom of the water in which he is at least completely below the floating building befin det, according to which the building - be it by means of its own drive or towed by a ship - aligned above the buoyant body and against its buoyancy force by means of ropes, in particular releasably braced against the buoyancy body. A detachable anchoring of the ropes, which in the context of the present disclosure, of course, also cables, hawsers and the like are understood, on the buoyant body and / or insbesonde re to the floating building can mean any known compounds, such as ken by eyelets or the like, to be guaranteed.

The tension of the building against the buoyancy body can be done for example in such a way that the building initially, in particular by flooding a ballast tank of the same kind, to a lower level. lowered (the buoyancy of the buoyant building is thus temporarily reduced), then connected to the buoyant body by means of the ropes and finally raised to a level, in particular by dumping the ballast tank thereof (the buoyancy of the buoyant building is consequently increased again), in which it is braced as a result of the ropes against the buoyancy body. Instead, in particular, it may also be provided that the building is first connected to the buoyant body by means of cables wound on winches, after which the winches are actuated in order to lower the building to a level in which, in turn, it is lifted against the ground by buoyancy Buoyancy is braced. If the building is equipped with a drive provided with rotation-displaceable screws, this drive can, for example, at the same time serve as a drive for the winches in order to clamp the floating building against the buoyant body. Also in this case results in a stable arrangement of buoyant building on the buoyancy body, the buoyant body due to its tension against the water bottom and the building due to a corresponding tension against the buoyant body even at high waves no significant

Can make fluctuations.

As already mentioned, the alignment of the floating building with respect to the buoyant body may otherwise be preferred

- By means of at least one, the floating building schleppenden ship; or

- By means of its own drive of the floating building, which in particular at least two spaced apart and preferably pivotable screws includes

happens.

In order to make the floatable building as insensitive as possible on the occasion of its "docking" on the buoyant body and in its arranged on the buoyant state against forces acting thereon due to wind load, waves and the like, can be provided in an advantageous embodiment that the building

- Has a substantially round, oval or polygonal, in particular at least hexagonal, cross-section and / or

- tapers vertically downwards and / or vertically upwards,

wherein it may be configured in particular substantially spherical or egg-shaped. In any case, to ensure ideal floating characteristics, the building should be substantially axially symmetric with respect to a vertical longitudinal central axis thereof.

As already indicated, the buoyancy body for the purpose of a simple and cost-effective production and a simple and quick final assembly with advantage modular structure and have a plurality of interconnected hollow bodies, which in particular individually, in groups or together with ambient water are floatable.

In addition, the buoyant building can expediently have a formwork made of a corrosion-resistant material, in particular from the group of textile concrete, carbon concrete and fiber-reinforced plastic, including composite materials thereof, or be manufactured substantially wholly from this. The same applies as far as possible for the buoyant body including its optionally provided support structure, which of course also from metal (alloy) s, such as corrosion-resistant steel and the like, can be made.

Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the drawings. Showing:

Fig. 1 is a schematic overall perspective view of an embodiment of a built on the sea surface, the building according to the invention with a buoyant floatable buoyant body and supported by the supporting structure, buoyant building; a schematic perspective detail view of resting on the support structure of the buoyancy body building of the structure of FIG. 1;

Fig. 3 is a substantially corresponding to FIG. 2

View with cut representation of the building;

Fig. 4 is a schematic side view of another

Embodiment of a built on the sea surface, the building according to the invention with a floating buoyancy body and a strained by means of cables thereto, buoyant building in a situation in which the floating building has been fixed by means of ropes on the buoyancy body, but has not been strained; and Fig. 5 is a schematic side view of the same building according to FIG. 4 after clamping the floating building against the buoyant body due to buoyancy.

The illustrated schematically in Fig. 1 in its entirety embodiment of an inventive, on the surface of waters, especially on the high seas, built structure comprises as essential components primarily a buoyant building 1, a floating buoyancy body 2 and a support structure 3, which, for example, fixed is connected to the buoyancy body 2.

As can be seen from FIG. 1, the buoyant body 2 is located entirely underneath the water surface 4 and is at the bottom by means of a plurality of clamping means 5, for example in the form of steel cables, thaws or the like, fixed on its underside Anchored 6 of the water. The buoyancy body 2 is pressed in this way by means of the clamping means 5 against its upwardly acting buoyancy force under water, so that it is braced against the water bottom 6 and thereby stabilized. The anchoring of the buoyant body 2 on the water bottom 6 can be done by any known from the prior art means, as mentioned above and incidentally are not the subject of the present invention.

For example, in the embodiment shown in FIGS. 1 to 3, the buoyant body 2 is substantially

(circle) ring-shaped and also has an et- wa (circle) annular cross-section. It may in particular be modularly composed of a plurality of not shown in detail ring segments in the form of hollow bodies, which, for example by means of valves equipped with shut-off valves, flooded with ambient water and, for example by means of suitable pumps, can be emptied (also not shown in the drawing). In the present case, its support structure 3 comprises several support columns 7, here four, which for example have an approximately rod-shaped configuration and extend obliquely inwards and upwards from the upper side of the buoyancy body 2. At the buoyancy body 2 facing away from (upper) ends of the support posts 7, the latter are connected to a support ring 8, which has a complementary to the outer contour of the building 1 inner contour. If the latter consequently has an approximately spherical configuration, as in the present case, then the support ring 8 is of substantially spherical-segment-shaped form, so that the building 1 is for example positively and in particular releasably supported on the support ring 8 of the support structure 3 of the buoyancy body 2.

As already mentioned, the building 1 has an axisymmetric shape with respect to a vertical longitudinal central axis thereof and in the present case is approximately spherical in shape in order to give it, on the one hand, a high level of floating stability and, on the other hand, the lowest possible attack surface against wind and wave loads. FIG. 3 also shows that the building 1 can be equipped with floating stabilizers, which in the present case comprise one or more ballast tanks 10 arranged on its underside, which can optionally be flooded or emptied with ambient water and in particular by means of locks remaining interior of the building 1 in Connect to make them available for use in the deflated state. The building 1, which may for example be made primarily of carbon concrete, ie a carbon fiber-reinforced, both pressure and in particular zugfes- concrete, may otherwise include a drawing not reproduced drive, such as the type of propellers or the like, or also be unpowered, so that it can be towed in the floating state by means of ships.

1, the buoyant body 2 can be braced against the water bottom 6 at such a level that the building 1 resting on its supporting structure 3 is partially disposed below the water surface 4 with its lower section (the building 1 thus experiences a certain buoyancy and thereby reduces the load to be absorbed by the buoyant body 2), or the buoyant body 2 can also be braced against the waterbody 6 at a higher level than its supporting structure 3 projects from the water surface 4, at least for the most part on this building resting 1 almost completely located above the water surface 4 (not shown). The construction of the structure according to FIGS. 1 to 3 takes place in a relatively simple and cost-effective manner, for example in such a way that firstly the floatable buoyancy body 2 provided with the supporting structure 3 is provided, for example by being preassembled on land. He can then in a conventional manner by means of suitable towed to the intended

Location, for example on the open sea or in an inland waterway, where, according to the state of Technique is braced by means of the clamping means 5 at the desired level against the bottom 6 of the water body to form a so-called "Tension Leg Platform". In addition, the buoyant building 1 is provided by, for example, also preassembled on land and water, to it - be it by means of a private drive or by means of a tug boat - also to the construction site of tense against the water bottom 6 buoyancy body 2, whereby ballast tanks 10 may optionally be flooded to give the building 1 a higher floating stability.

For the purpose of arranging the floating building 1 on the support shell 8 of the support structure 3 of the buoyancy body 2, the latter can be flooded, for example, until it falls due to gravity to a level in which it is completely below the level of the floating building 1. Then, the building 1 - again, it is by means of its own drive or be it by means of a tug boat - aligned with respect to the buoyancy body 2, that it is located vertically above the support shell 8 of its support structure 2. Then, the building can be arranged on the buoyancy body 2 by the latter is emptied so that he experiences buoyancy again and is raised to its original level, in which he is clamped by means of the clamping means 5 against the water bottom 6. The building 1 is received on the support shell 8 of the supporting structure 3 of the buoyancy body and comes, especially under positive locking, for permanent support, which of course additional lent by means of any known fasteners, such as screws, bolts or the like, can be connected to the support ring , In the illustrated in FIGS. 4 and 5 in a highly schematic form embodiment of the invention, on the surface of waters, especially on the high seas, built structure identical or equivalent components are provided with the same reference numerals and require no further discussion. The in the fug. 4 and 5 differs from that according to FIGS. 1 to 3 primarily in that the buoyancy body 2, which again forms a so-called "tension leg platform" by means of the tensioning means 5, does not have a supporting structure 3 (see FIGS. 1 to 3) ), but in turn serves to brace the floating building 1 against its buoyancy. For this purpose, a plurality of, for example, approximately uniformly defined on the circumference of the buoyancy body 2, ropes 11 are provided, which may be held in the region of the buoyancy body 2 opposite end by means of suitable floats, such as buoys or the like on the water surface 4, for example they can be connected with suitable fastening means of the building 1, such as hooks, eyes or the like, in particular detachably.

The arrangement of the building 1 on the buoyant body 2 can thus in this case, for example, proceed such that, as illustrated in FIG. 4, the floating building 1 - be it by means of its own drive or be it by means of a tugboat - above the buoyant body 2, which is at a level entirely below the floating building 1. Then, the floating building 1 is connected by means of ropes 11 with the buoyancy body 2, after which the cables 11 are shortened to clamp the building 1 against its buoyancy against the buoyancy body 2 (See Fig. 5). The shortening of the cables 11 can be done in particular by means arranged on the building 1 winds 12, which are expediently operated by a motor. Alternatively or additionally, it is also conceivable, for example, that the building 1 first by floods his

Ballast tanks 10 and consequent reduced lift is lowered to a lower level and then connected by means of ropes 11 with the buoyancy body 2, after which the ballast tanks 10 are emptied, so that the building 1 raised due to increased buoyancy back to a higher level and thereby against the Buoyancy body 2 is clamped.

The buoyant building 1, by the way, may expediently be substantially energy self-sufficient in that its surface is provided with a plurality of photovoltaic cells, which are in a conductive connection with a current storage device.

Claims

claims

Structure for erecting on the surface (4) of waters, in particular on the open sea, comprising at least one floatable buoyancy body (2) which can be braced against the bottom (6) of the body by means of tensioning means (5) effective against its buoyancy, and at least one building (1), which is arranged on the buoyancy body (2), characterized in that the building (1) in turn is floatable and in the floating state on the buoyancy body (2) can be arranged.

Building according to claim 1, characterized in that the building (1) is arranged detachably on the buoyancy body (2).

Building according to claim 1 or 2, characterized in that the buoyancy body (2) has an at least partially complementary to the outer contour of the building (1) supporting structure (3) on which the building (1), in particular substantially form-fitting, is worn.

Building according to claim 3, characterized in that the support structure (3) of the buoyancy body (2) has at least one support shell (8) and / or at least one support ring on which or on which the building (1) is carried.

Building according to claim 1 or 2, characterized in that the building (1) in turn by means of counter ner buoyancy force more effective, especially on winds (12) windable, ropes (11) against the buoyancy body by (2) is braced.

Building according to one of claims 1 to 5, characterized indicates that the building (1) is equipped with an Antri, which in particular at least at a distance from each other, preferably pivotable, screws comprises.

Building according to one of claims 1 to 6, characterized in that the building (1) is equipped with floating stabilizers, wherein it has in particular at least one, arranged on its lower side and optionally floodable with ambient water ballast tank (10).

8. Building according to one of claims 1 to 7, characterized in that the building (1)

- tapers vertically downwards and / or vertically upwards,

wherein it is designed in particular substantially spherical or egg-shaped.

9. Building according to one of claims 1 to 8, characterized in that the buoyant body (2) is constructed in a modular manner and has a plurality of interconnected hollow bodies, which in particular individually, in groups or together with ambient water floodable.

10. Building according to one of claims 1 to 9, characterized in that the building (1) and / or the buoyancy body (2) a formwork of a korrosionsfes th material, in particular from the group of textile concrete, carbon concrete and fiber reinforced plastic including composite materials thereof, or substantially entirely made thereof.

A method of constructing a structure according to any one of the preceding claims on the surface (4) of waters, especially on open sea, comprising the following steps:

- providing at least one floatable buoyancy body (2);

- Spanning the buoyant body (2) against its buoyant force on the bottom (6) of the water body by means of clamping means (5);

- Provide at least one buoyant

Building (1);

- launching the building (1) and aligning it with respect to the buoyancy body (2); and

- Arranging the floating building (1) on the buoyancy body (2).

12. The method according to claim 11, characterized

in that a buoyancy body (2) provided with a support structure (3) complementary at least in sections to the outer contour of the building (1) is used, which is lowered, in particular by flooding it, to a level in which the support structure (3) extends completely below the floating building (1) Det, according to which the building (1) aligned above the support structure (3) and the buoyancy body (2), in particular by emptying the same, is raised due to its buoyancy to a level at which its supporting structure (3) to carry the building (1) can.

A method according to claim 11, characterized in that the buoyancy body (2) is braced at a level below the water surface (4) against the bottom (6) of the water body, in which it is located entirely below the floating building (1), after which Buildings (1) above the buoyancy body (2) aligned and against its buoyancy force by means of cables (11), in particular releasably, against the buoyancy body (2) is clamped.

A method according to claim 13, characterized in that the building (1) is thereby braced against the buoyancy body (2) by

- First, in particular by flooding a ballast tank (10) thereof, lowered to a lower level, then connected by means of the ropes (11) with play with the buoyancy body (2) and finally, in particular by emptying the ballast tank (10) thereof to a Level is raised, in which it is clamped by means of ropes (11) against the buoyancy body (2); or

- Is first connected by means of winds on winds (12) ropes (11) with play with the buoyancy body (2), after which the winches (12) are actuated to lower the building (1) to a level in which it by means of Ropes (11) against the buoyancy body (2) is braced.

Method according to one of claims 11 to 14, characterized in that the orientation of the floating building (1) with respect to the buoyancy body (2)

by means of at least one floating building (1 towing ship;

- By means of its own drive of the floating

Building (1), which in particular comprises at least two spaced apart, preferably pivotable, screws,

happens.