Floating and / or floatable system and method for providing a foundation for a construction on water

Abstract

The present invention relates to a floating system for providing a foundation for a construction on water. The invention further relates to a subassembly for use in said floating system. The invention also relates to a floating city comprising multiple floating systems according to the invention. The invention further relates to a method for constructing a floating system for providing at least part of a foundation for a construction on water.

Description

[0001] Floating and / or floatable system and method for providing a foundation for a construction on water

[0002] «SUMMARY»

[0003] The present invention relates to a floating and / or floatable system for providing a foundation for a construction on water. The invention further relates to a subassembly for use in said floating system. The invention also relates to a floating city comprising multiple floating systems according to the invention. The invention further relates to a method for constructing a floating system for providing at least part of a foundation for a construction on water.

[0004] «INTRODUCTION»

[0005] The world’s population is increasing and all these people need a place to live, to work, to produce food, to play. Due to the increasing number of people, the need for housing and living areas is also increasing. In many places it is hard to find sufficient suitable living areas. Natural disasters such as storms, floodings and rising sea levels are forming a threat to living areas for many people. Due to climate change the likelihood of these natural disasters happening is increasing. Therefore, there is a need for spaces to live, work and stay which are able to withstand the effects of climate change. Expanding the living spaces from land to water increases the possibilities enormously, but they come with their own challenges.

[0006] «MOTIVATION»

[0007] Living on water receives a lot of attention in recent years as a potential solution. However, a house boat has a downside of small living areas, expensive materials and maintenance and the need for a connection with the land for example for electricity and water. House boats have other limitations, for example: they are made (and maintained) in a drydock and need to be towed to the location. House boats with a concrete caisson have less maintenance, but they are often too large and heavy to transport by road. The docks that are needed to produce them also limit the output and cannot scale up to the numbers that are needed to help mitigate the current housing shortage (in NL but also other cities in the world). In several places buildings, for example houses, are built on water, such that they are able to rise along with the water level if needed. A downside of these buildings is that the transport of their construction elements is a constraint in terms of size and costs for transport and construction at the site. Another downside of current systems is that building a structure on water often requires extensive training of construction workers and / or expensive constructions such as a canopy for enabling the construction of the structure on water.

[0008] It is an object of the invention to provide a floating system which takes away at least one of the above mentioned disadvantages.

[0009] The invention thereto provides a floatable system for providing a modular foundation for a construction on water, comprising:

[0010] - at least one floatable module, optionally a plurality of floatable modules,

[0011] - each module comprising:

[0012] ■ multiple floatable modular floor elements, each floor element comprising a casing having a bottom floor and a circumferential (raised) side edge, which side edge protrudes from the bottom floor, in particular forming a raised side edge, o at least one, preferably concrete, foundation element for providing at least part of a foundation for a construction; wherein, preferably within one module, multiple floatable floor elements are positioned next to each other forming a floatable platform; wherein, preferably within one module, adjacent floatable floor elements are mutually coupled; and wherein the coupling between two adjacent floating floor elements is at least a coupling of two adjacent side edges.

[0013] In the system according to the present invention, each floor element may be shaped such that it forms a tray-shaped element and / or a tray. The floatable platform is formed by coupled floor elements. The, optionally tray-shaped, floor elements are advantageous because they can form a floatable platform such that a person can stand on said floatable platform during construction of the system. A person, for example a construction worker, can stand on the floatable platform during the construction thereof. The floatable platform, formed by coupled floor elements, may provide an aid during construction. This is advantageous for an efficient and effective construction which reduces cost of construction and thus reduces cost of the system.

[0014] The coupled floor elements may form an outer shell. The use of the floor elements (and optionally wall elements) is advantageous for protecting the at least one foundation element from external influences. External influences during construction and thereafter, such as surrounding water (fresh- and / or saltwater), pests and / or small collisions with objects in the surrounding water.

[0015] In the system according to the present invention, at least one foundation element for providing at least part of a foundation for a construction could be made from concrete, steel or the like. Another construction material with high strength may also be used. The rigidity (stiffness) of the at least one element is such that the (internal) forces of the construction are distributed over the floating system. In a preferred embodiment, the foundation element is manufactured using concrete. Another option is for example steel. Any material providing sufficient stiffness, strength and stability for forming a foundation can be used. The advantage of concrete is that it can be given its final shape at the construction site itself, preferably directly on the water. Building directly on the water level, is in particular advantageous to omit the challenge of launching a heavy structure into the water.

[0016] In an embodiment of the system one (single) module can provide the foundation for one construction and / or building to be placed on top. Within the system according to the present invention, it is also possible that multiple buildings or constructions may be placed onto one module and / or floatable platform. Within the one module, multiple floor elements are coupled to one another forming a floatable platform. The system according to the present invention may comprise a plurality of floatable modules. If applied, these floatable modules can be coupled in various ways. For example, by coupling of side edges and / or other elements positioned at the circumference of the floatable platforms of the modules to be coupled.

[0017] The system according to the present invention is advantageous because it is able to provide a foundation for a structure, for example a house or a school, at water level. The system ensures that the structure built on top will not likely suffer from floodings, since the system remains afloat and rises with the water level. The floatable system can be constructed at the waterfront or on the water itself. Due to the modularity of the modules and / or the modular floor elements it is possible to create various sizes and shapes, suited to the needs of the users. The system as such is thus not limited to a small size, as is the case in house boats for example. The floatable platform of the system can have various shapes and sizes corresponding to the requirements of the construction for which it provides at least part of the foundation. The modular floor elements can be easily transported from the factory to the site where assembly of the system is needed, which saves a lot of transportation costs (and trouble such as handling of heavy cranes). Also from an environmental aspect this is beneficial. It is also possible to build subassemblies of several floor elements on the shore and subsequently assemble at least part of the system at the water level (on the water while afloat). Assembly at the site also has the advantage that transport can be done much more efficient and as such will be saving on energy for the transport. The separate parts of the modules can be transported separately. The floor elements can be transported separately. The (ingredients and equipment for the) foundation element, such as concrete, can be transported separately. Preferably the foundation element is made of pouring concrete at the site. Prefabricated elements are possible but not preferred. The invention is typically aimed at constructing the platform on water while floating and as such pouring concrete in the (floating) floatable system while the platform is positioned at the water level. It is also optional to use 3D printed concrete for constructing the foundation element. This can be done at the construction site or on a floating platform on water level.

[0018] For assembly of the floatable modular floor elements, to form the floatable platform, the modular floor elements can be mutually coupled. It is also possible that the modular floor elements are interlockable. Two adjacent floatable floor elements are at least coupled by a coupling between two adjacent side edges. The coupled side edges provide stability and rigidity to the platform. Furthermore, the side edges of the casing form an obstacle to prevent water from flowing in and provides buoyancy during construction. Preferably the modules remain substantially free from water on the inside. Due to the buoyancy and stability characteristics of the system there water inside the modules is not desirable. The (concrete) foundation element in the system increases watertightness of the system, as well as robustness and stability. Furthermore the concrete, if applied, is a very suitable material for forming at least part of the foundation for a construction. The foundation element may comprise reinforced concrete for additional strength and stiffness.

[0019] The overall density of the system and of each floatable module and of each floor element is typically less than the density of water such that not only during use of the system but also during construction thereof the modules, the floor elements, the formed platform and the system will remain afloat.

[0020] In an embodiment, the coupling between two adjacent floatable modules and / or two adjacent floatable floor elements is at least one coupling of (either) the upper parts and / or lower parts of at least two adjacent side edges. By coupling the upper parts of side edges preferably a concrete tight connection is made on top. When the coupled modules and / or floor elements are subsequently filled with material, such as concrete or other relatively fluid medium, the concrete or medium is contained between the side edges of the modules without spilling through two coupled modules or floor elements. This facilitates filling of the modules.

[0021] The modular floatable system according to the present invention is in particular advantageous because its properties can be optimized (during manufacturing) according to the desired construction to be placed on top of the floatable system. For example, optimize stability for a given building. Examples of properties that can be optimized in the floatable system are the dimensions of the floatable system (width, length, amount of modules), the amount of concrete and optionally the amount of rebar.

[0022] In a preferred embodiment the system according to the present invention comprises insulation material positioned in the floatable modules, wherein preferably the insulation material comprises buoyant elements. The insulation material increases the insulation value for the construction, making the construction more sustainable. The insulation material further enhances the buoyancy characteristics of the system. Preferably the bottom floor and sides of the platform are fully covered with insulation material. This can be advantageous to avoid or at least reduce thermal bridges to occur. A person, for example a construction worker, may stand on the floatable platform and simultaneously install insulation material while the floatable platform is floating. This is advantageous for an efficient and effective construction which reduces cost of construction and thus reduces cost of the system. Optionally, thereafter the at least one foundation element may comprise concrete that is poured over the insulation material (if applied). In case (poured) concrete is used as a foundation element, it is possible that reinforcement material (steel bars) can be positioned on top of the formed floatable platform while a person is standing on said platform.

[0023] In an embodiment, the coupled floor elements and if applied the wall elements may form a shell and / or a hull. The coupled floor elements and / or wall elements (if applied) can be used as an aid during construction and as protection of the foundation thereafter, thus not forming part of the strength of the foundation. If applied, this makes it possible to create continuous insulation within it without interruptions ('thermal bridges'), which benefits insulation value and prevents moisture problems. This insulation can be continued in the superstructure (buildings). This is not possible with other current systems.

[0024] In an embodiment, the system according to the present invention comprises at least one modular wall element. Preferably such modular wall element can be positioned at the circumference of the floatable platform, in particular forming a circumferential side wall. Typically the circumferential side wall, if applied, comprises four modular wall elements. Multiple modular wall elements can be mutually connected at adjacent edges to form the circumferential side wall. Preferably a modular wall element comprises is manufactured from a sheet material. The modular wall element may be completely flat. This is advantageous for transportation purposes. At the construction site the wall elements can be assembled into a circumferential side wall and connected to the floatable platform. Optionally the modular wall element may comprise at least one folded edge. For example, one modular wall element comprises one folded edge, or optionally two folded edges. In case two folded edges are applied, these may be positioned on opposite sides or alternatively on sides perpendicularly positioned with respect to another. If applied, a folded edge can be used for assembling purposes. Two adjacent wall elements may be in mutual contact and / or assembled at their respective folded edges.

[0025] The circumferential side wall, if applied, is preferably watertight or waterproof. For example by using watertight materials for the manufacturing of modular wall elements and connecting them in a watertight manner. Preferably modular wall elements can be connected to the outer side edges of the (coupled) floor elements. Possibly the modular wall elements are watertight connected to the outside of the floatable platform. For example by welding. If at least one modular wall element is applied, preferably multiple wall elements may form a circumferential side wall. Adjacent wall elements may be connected by welding or other connection means. Such circumferential side wall may surround or circumvent the floatable platform. The at least one modular wall element, if applied, is beneficial during construction for protection against water flowing into or onto the floatable platform. After construction, during use of the system, the at least one modular wall element protects the system. In particular, the modular wall element protects the concrete against external influences such as water waves and humid air. A circumferential side wall comprising multiple modular wall elements can be used for forming at least part of a foundation for a construction. It is beneficial when multiple modular wall elements form at least part of a circumferential side wall, because the multiple modular wall elements can be easily transported. Due to their modularity the modular wall elements can be designed such that the dimensions are easy to transport and at the construction site the modular wall elements can be coupled together to form a side wall on the floatable (floating) platform for example.

[0026] The modular wall elements are further advantageous because the modular wall elements can comprise a height that is bigger than the height of the side edges of the floor elements. This creates a volume that can be filled with insulation material, such as buoyant elements, for example polymer foam such as polystyrene foam. The increased volume that can be made by the wall elements can be adjusted according to the construction needs. A higher modular wall element causes a bigger volume, which may be filled with insulation material (buoyant elements) that can increase the buoyancy properties of the floatable system. Preferably, each modular wall element, if applied, comprises a similar height. The height of the modular wall element is at least similar to the height of the side edges of the floor elements. At least one modular wall element, if applied, may comprise a height that is bigger than the height of the circumferential (protruding and / or raised) side edge of at least one floor element. The height of the modular wall element may be at least two times bigger than the height of the circumferential side edge. It is also possible that the height of the modular wall element is at least five times bigger than the height of the circumferential side edge, more preferably the height of the modular wall element can be at least ten times bigger than the height of the circumferential side edge of at least one floor element. The height of the wall element and / or side edges can be interpreted as the length (height) of the wall element and / or side edge where the wall element and / or side edge extends in a direction substantially perpendicular to the bottom floor. The height of the wall element and / or side edges can further be described as the total distance spanned by the entire wall element and / or side edges in a direction substantially perpendicular to the bottom floor.

[0027] It is possible that the floor elements within a module may comprise similar dimensions. More specifically, in an embodiment, each circumferential side edge of the floor elements may comprise a similar height.

[0028] Optionally, each wall element comprises a casing having a bottom floor and a circumferential side edge which side edge protrudes from the bottom floor. Even more preferably the modular side wall elements can be similar to the modular floor elements. This would even further improve the modularity of the system according to the present invention. It is also conceivable that the modular wall elements have different dimensions.

[0029] In an embodiment, the modular floor elements and the modular wall elements may have a corresponding shape, in particular a rectangular shape.

[0030] It is also possible that the floor elements may be tray-shaped, comprising a rectangular bottom floor. This may be combined with any modular wall element, in particular a rectangular modular wall element. For a strong connection between a wall element coupled to a floor element it is possible to use welding for coupling at least one wall element to at least one adjacent floor element. Also for coupling of mutual adjacent wall elements welding may be used. The system may further be strengthened by providing and curing of the concrete element. Optionally additional temporary reinforcement elements may be used during construction or assembly.

[0031] For a stable construction it is preferred that each wall element, if applied, is coupled to the floatable platform under an angle greater than 0 degrees, preferably 90 degrees. A wall element can be coupled while the floatable platform is afloat on water level. Two wall elements may be coupled on land to form a subassembly. Optionally, said subassembly can be coupled to the (floating) floatable platform on the water. An angle of 90 degrees between the floatable platform and the wall element is preferred for an easy construction of the system according to the present invention.

[0032] When the floatable system is afloat, waves can hit the outside of the floating floatable system. In particular, waves may hit the outside of the modular wall elements. It can be beneficial to couple the modular wall elements to the floatable platform under a different angle for an improved resistance to the impact of waves and other environmental influences. Which angle is suitable may depend on local circumstances, such as the height and intensity of the occurring waves.

[0033] In an embodiment at least one wall element may be coupled to the floatable platform under an angle in the range of 0 - 90 degrees, preferably between 60 - 85 degrees, even more preferably in between 65 - 80 degrees.

[0034] Optionally at least one wall element is coupled to the floatable platform under an angle greater than 90 degrees, preferably in between 90-170 degrees, more preferably in between 100-150 degrees, even more preferably in between 110-140 degrees.

[0035] Combinations of several embodiments of coupling of at least one modular wall element to the floatable platform are possible. For example, it is possible that one module according to the present invention comprises at least one wall element which is coupled to the floatable platform under an angle of substantially 90 degrees, and at least one wall element which is coupled to the floatable platform under an angle greater than 90 degrees. Other combinations are also possible.

[0036] Moist and humidity are undesired factors for a foundation of a construction. Typically, molds can occur in insulation material when humidity levels increase. Preferably such molds are kept away from a construction such as a school or a house. In the floatable system according to the present invention, it is therefore beneficial that in between the construction placed on the foundation as provided by the system at least one concrete layer is present. In an embodiment of the system, the foundation element can be composed of concrete, and wherein the at least one wall element may form a circumferential side wall around the floatable platform, and wherein insulation material can be positioned in between the at least one concrete element and the outside wall. Said outside wall can optionally be formed by multiple modular wall elements. In this embodiment, the insulation material is located in between a concrete layer and an outside wall. This means that a concrete layer can be present in between the insulation material and a construction built on top of the system according to the present invention.

[0037] When insulation is applied on the exterior face of external (concrete) walls and floors, the structure will usually stay closer to the internal temperature and has lower chances of condensation. With insulation applied to the interior face, the external walls and floors can be much colder and condensation can take place inside of the structure. Trapped moisture can create issues such as molds or corrosion.

[0038] An additional issue is that most materials can have some moisture transport (even if it is 'watertight'). This moisture can become trapped, unless the interior face allows it to evaporate (which is the case in our 'embodiment').

[0039] Similar issues are actually very common in (incorrectly) insulated basements. To avoid or at least reduce moisture issues, insulation material can be applied in between the concrete and the wall and / or floor element for example. As seen from the construction, the insulation material is thus preferably on the outside of the concrete. In this manner, no insulation is present in between the concrete foundation element and a construction. No insulation in between the concrete foundation element and a construction is beneficial for avoiding molds / moisture etc.

[0040] The interaction between insulation material and the construction can be decreased.

[0041] In a specific embodiment, the insulation material comprises insulation blocks which blocks can be stacked within a module. If insulation blocks are applied, the insulation blocks can form a formwork for at least one concrete foundation element. Said (concrete) foundation element can as such form a barrier in between the construction to be placed on top of the system and the insulation material. The (concrete) foundation element can be in direct contact with the insulation material on at least part of the lower side, and on at least part of the top side of said element can be in direct contact with the construction.

[0042] Alternatively, a temporary formwork can be placed in a module to optionally pour in a (concrete) foundation element. In this alternative embodiment, a volume of air can be present in between the construction and at least part of the (concrete) foundation element. Simultaneously, the (concrete) foundation element can be in direct contact with at least part of the construction to be placed on top and at least part of the (concrete) foundation element can be in direct contact with the insulation material and at least part of the (concrete) foundation element can be in contact with a volume of air enclosed in between at least the (concrete) foundation element and at least part of the construction to be placed on top.

[0043] It is preferred that at least part of the foundation element, preferably entire foundation element, is made of concrete. The foundation element and thus, if applied, the concrete forming the foundation element, may be in direct contact with the insulation material. In an embodiment at least part of the concrete is poured over or encapsulates the insulation material. For example, wherein a bottom layer of insulation material is placed on the platform and on top concrete is poured. In another embodiment, first a layer of insulation material is placed on the bottom, whereover a bottom layer of concrete is poured. In addition, a (temporary) formwork placed on the bottom layer and spaced apart from the outer side edges defining the circumference of the platform is placed. Concrete is poured in the formwork for making side edges of concrete. In another embodiment blocks of insulation material are placed on the platform. The blocks are placed such that a formwork is created with a substantially flat top side leaving space in between adjacent blocks. When concrete is poured over the insulation blocks a top layer and concrete beams in between the insulation material are formed, forming a part of the foundation for a construction. It is possible that a concrete top layer is added, which is beneficial for forming a stable substantially flat top surface for the foundation for a construction.

[0044] The insulation material can be made of various types of materials as long as they provide buoyancy to the system. For example, the insulation material may be chosen from the group consisting of: polystyrene, expanded polystyrene and / or biofoam.

[0045] In another embodiment, the concrete is foamed concrete. In said embodiment the concrete serves as insulation material and as an element for a foundation simultaneously.

[0046] The coupling between two adjacent floatable floor elements (or modules) can be at least a coupling of two adjacent side edges. Preferably, the coupling between two adjacent floatable floor elements (or modules) is established by coupling all of the mutually adjacent side edges (only). In this embodiment preferably each side edge with a direct adjacent side edge are mutually coupled. This provides a strong coupling. These side edges may be coupled in various ways. Each coupling may use the same way of coupling, but multiple coupling methods are also conceivable. For example, wherein in a subassembly of a subplatform another coupling method is used (on land) compared to coupling of the subassemblies (subplatforms) into a floatable platform (on water).

[0047] Examples of how floor elements and / or wall elements, if applied, (and / or modules) are coupled by a connection can be any of the coupling (methods) chosen from the group of: welding, gluing, screwing, bolting, male-female click profile, steel clamps or cables / rods that can be integrated with the rebar for the concrete or the like. Welding may be performed ashore, on water level or under water level. The rebar (reinforced bars) of the concrete, if applied, may run through the side edges and as such form a connection between modules.

[0048] As an alternative, concrete can be used to connect two adjacent modules, two adjacent floor elements and / or two wall adjacent elements when a side edge is provided with a through hole which is aligned with an adjacent side edge provided with a similar through hole. In this coupling method a through hole in both adjacent side edges is used, wherein the through holes are aligned before coupling. When concrete is poured onto the modules, the concrete will also go through through- holes in liquid state, once hardened (set) the solid concrete connects the adjacent modules. It is also possible that the modules are connected in a similar fashion by foamed concrete or a composite or thermoplastic.

[0049] Another way for forming a coupling is that each floor element and / or wall element and / or module may be provided with integrated coupling elements, preferably such that the coupling elements are integrated in the circumferential side edge. Such integrated coupling elements may use a male-female part, click connections or the like.

[0050] Preferably, each module, preferably each floor element and / or each wall element, can be provided with internal reinforcement ribs. The internal reinforcement ribs reinforce the platform, enhance the stiffness and stability of the platform. If applied it is preferred that each floor element is provided with reinforcement ribs. It is advantageous if all floor elements are similar and interchangeable during the assembly process. The reinforcement ribs may be positioned on the internal bottom side of each modular floor element, preferably wherein at least part of the internal reinforcement ribs extends in between and up to two opposite side edges. In addition or alternatively, each module and / or floor element and / or wall element may be provided with reinforcement ribs, which are positioned on the internal side of the side edges of each module. These side ribs increase the stiffness on the side and reinforce the side edges of the modules. Alternatively, an internal reinforcement structure may be used in addition or as an alternative to the reinforcement ribs. An example of an embodiment is that at least one modular floatable floor element, preferably each modular floatable floor element, is provided with an internal reinforcement structure such as a steel box.

[0051] To withstand waves, wind, tides and other weather influences having an effect on the water, it is preferred that the floatable system is provided with multiple wall elements forming a circumferential side wall. The distance between the water level and the top of the floatable system is also called the freeboard. Said freeboard is typically smaller than the height of the circumferential side wall (if applied). Said freeboard preferably can have a height of at least 50 centimetres, preferably at least 1 meter, or even more preferably at least 1 .2 meter.

[0052] For the casing of the floor elements it can be advantageous that the material can endure a lifetime in (salt) water, provides a watertight layer and as such stays afloat.

[0053] The circumferential side edge and / or side wall may be composed out of a polymer, for example HDPE, ABS or LDPE. These materials are advantageous as they are chemically inert. It is possible that the casing of each floor element is composed out of a polymer, for example a thermoplastic polymer and / or polyolefin, such as HDPE, ABS or LDPE.

[0054] As an alternative, it is possible that the casing of the floor elements can be composed out of a metal, or the casing of the floor element can be composed out of concrete. A combination of a polymer, metal and / or concrete is also possible. Independent of the material choice, the casing of each modular floor element is preferably floatable as such.

[0055] In an embodiment, each floor element can be composed of solely the casing.

[0056] The floor elements and / or wall elements, if applied, may be at least partially, preferably entirely, composed out of a composite. In an embodiment, each module may comprise a circumferential wall (optionally comprising multiple wall elements) which circumvent (surround) the floatable platform, wherein the circumferential wall may be at least partially composed out of a composite. Optionally, the casing of the floor element can be at least partially composed out of a composite. Composites have the advantages to give high strength for a relative low weight of the material which is beneficial for the buoyancy characteristics.

[0057] It is also possible that each module comprises a circumferential wall which circumvent (surround) the floatable platform, wherein the circumferential wall may be at least partially composed of wood. In an embodiment, the casing of the floor element may be at least partially composed of wood. Wood is a natural material and as such may be a preferred material for construction. Wood is also known for its floatable characteristics.

[0058] For additional reinforcement of the system, it is possible that the concrete element comprises reinforced concrete. Especially for heavier buildings this is a preferred version given that is provides additional structural integrity to the system.

[0059] In an embodiment, at least two side edges of at least one, preferably each, floor element can be positioned at an angle with respect to the bottom floor such that multiple floor elements are stackable. Stackable floor elements would further limit the volume needed for transport and thus reduce transportation costs.

[0060] The floatable system according to the present invention can also be referred to as a floating substructure and / or a floating foundation.

[0061] The floatable platform according to the present invention may also be referred to as a floatable modular hull, because the function of the floatable platform is to form a hull and / or shell for aid during construction and protection against external influences during construction and thereafter.

[0062] The invention further relates to a subassembly of at least two coupled floatable floor elements, optionally tray-shaped, for use in a floating system according to the present invention. Subassemblies may be manufactured or assembled at a remote location and then transported to the site of assembly of the system according to the present invention. Subassemblies are advantageous because they can be assembled using more specialized location-bound tools. Using subassemblies can also save time at the construction site, which is a benefit for some projects. The subassemblies may be assembled into a floatable platform at the construction site while afloat on water level.

[0063] The invention further relates to a floating neighbourhood or city, comprising multiple floating floatable systems according to the present invention which provide foundations for construction elements. Preferably the multiple floating floatable systems are mutually connected. In particular, each floating system can be connected to at least one other floating floatable system according to the present invention. A floating city can comprise multiple floating platforms according to the present invention, or alternatively one big floating platform according to the present invention. It is also possible to create a bridge as a connection between two floating platforms according to the present invention, thus forming a floating city. Advantage of the present invention is that it is scalable and expandable. The floating city further comprises multiple construction elements, wherein the construction elements comprise at least one road and at least one building. Said construction elements may comprise various applications such as roads, pathways, public squares, gardens, parking lots, landing stages or jetties, houses, offices, schools, shops, medical service centers. It is possible that each floating system provides a foundation for one construction element. It is also possible that a floating system according to the present invention provides a foundation for multiple construction elements. The systems can be connected by use of a system according to the present invention providing a foundation for a connecting path or road. It is possible that multiple systems are then connected by a connection element, which is advantageous to prevent two systems floating apart. In a floating city it is conceivable that people will use water transportation or perform water sports, and as such landing stages or jetties for boats as construction elements are conceivable.

[0064] The invention further relates to a method for constructing a floating system for providing at least part of a foundation for a construction on water, in particular a floatable system according to the present invention. The method comprising the steps of, preferably the successive steps of:

[0065] A) optionally creating at least one floating module on the water level, said floating module comprising at least multiple modular floatable floor elements, each floor element comprising a casing having a bottom floor and a circumferential side edge, which side edge protrudes from the bottom floor, wherein the floor elements are mutually couplable on the water level;

[0066] B) mutual coupling of at least two adjacent side edges of at least two adjacent floatable floor elements for forming a floatable platform, preferably while floating on the water level and / or lying beside the water level; C) placing and coupling modular wall elements to the floatable platform, preferably floating floatable platform, forming a circumferential side wall,

[0067] D) creating a formwork, preferably by placing temporary panels or by positioning insulation material in a predefined manner on or in or around the formed platform from step B); and

[0068] E) pouring concrete in the formwork created in step D)

[0069] It is possible that the coupling of the side edges of step B) is simultaneously creating the formwork of step D), such that concrete can be poured directly in or over the floatable platform.

[0070] The modularity of the method by using modules, modular floor elements and modular wall elements for building a floating system has the same advantages as mentioned above for the floating system. Further, the method according to the present invention is advantageous because the pouring of the concrete can happen at the construction site where also the construction on water is built.

[0071] The method allows for creating subassemblies for floatable modules, coupling at least two modular floor elements. Said subassemblies can be made on a land surface and later on be placed on water. It is also possible that floatable modules are placed directly on a water surface and are then coupled according to step B) while afloat.

[0072] Examples of how (mutually adjacent) floor elements are coupled by a connection are any of the coupling (methods) chosen from the group of: welding, gluing, screwing, bolting, male-female click profile, steel clamps or cables / rods that can be integrated with the rebar for the concrete or the like. These examples for coupling also can be applied to (mutually adjacent) wall elements. Welding may be performed ashore, on water level or under water level. The rebar (reinforced bars) of the concrete may run through the side edges and as such form a connection between (mutually adjacent) floor elements. This may also apply to coupling of mutually adjacent modules, and / or mutually adjacent wall elements. It is possible that step B) and E) are integrated steps when concrete is used for coupling of at least two floor elements. In another embodiment reinforced bars of the concrete run over the side edges of the floor elements. The modules may be filled with EPS and a concrete top layer is poured on top of the module. Optionally reinforced bars are included in said concrete top layer. In this embodiment, the floor elements are connected by interconnected HDPE floor elements which is reinforced by a common concrete top layer. Instead of EPS it is possible that Polyethylene foam, polyurethane foam, PLA foam from renewable resources or a combination thereof may be chosen. Furthermore, instead of HDPE it is possible to use MDPE, LLDPE, or other polymers such as PP, ABS, PET and bioplastics or a combination thereof.

[0073] The formwork created in step C) may be created by placing temporary panels or by placing insulation blocks in a predefined manner.

[0074] As an example of step D) insulation material can be placed in the floor elements before the floor elements are assembled together. Alternatively, the insulation elements are placed on top of the assembled floor elements, forming the platform. The formwork may comprise insulation elements (EPS) to shape the formwork and floor elements for the stability and watertightness during pouring concrete in step E).

[0075] For step E) several types of concrete are possible, such as foamed concrete or reinforced concrete. Pouring concrete is beneficial compared to using prefabricated concrete panels. It is beneficial to pour the concrete at the construction site, to save on transportation costs and effort. Pouring concrete is also more customizable in terms of size and shape of the top layer. When foamed concrete is used in the method according to the present invention, the step C) may comprise creating a formwork by placing a circumferential side wall for example.

[0076] The method may further comprise step F) placing insulation material within or on the floatable modules, preferably while the floatable modules are floating. In an embodiment this step can be done prior to step D) or for another embodiment after step D) depending on the desired embodiment of the system to be constructed.

[0077] In a preferred embodiment, the insulation material in step F) comprises insulation blocks. The insulation blocks may be used to create a formwork in step D).

[0078] Typically the insulation material is a buoyant material, which increases the buoyancy of the system to be constructed. In an embodiment, after step E) the method may comprise the step of pouring a concrete top layer. The concrete top layer is beneficial for a substantially flat and even part of a foundation for a construction.

[0079] The method according to the present invention is preferably used to construct a floating system according to the present invention. Various types of embodiments of systems to be constructed and their advantages are described above.

[0080] Preferably the method comprises a step of mutually coupling multiple modules. Multiple floatable modules can be mutually coupled, wherein the coupling between two adjacent floatable modules is preferably at least a coupling of two adjacent floor modules and / or a coupling of two adjacent wall modules, in particular wherein the coupling is made while the adjacent floatable modules are afloat.

[0081] Further embodiments of the invention are presented in the non-limitative clauses presented below:

[0082] 1 . Floatable system for providing a modular foundation for a construction on water, comprising:

[0083] - at least one floatable module,

[0084] - each module comprising:

[0085] ■ multiple floatable modular floor elements, each floor element comprising a casing having a bottom floor and a circumferential side edge, which side edge protrudes from the bottom floor, o at least one, preferably concrete, foundation element for providing at least part of a foundation for a construction; wherein multiple floatable floor elements are positioned next to each other forming a floatable platform; wherein adjacent floatable floor elements are mutually coupled; and wherein the coupling between two adjacent floating floor elements is at least a coupling of two adjacent side edges. 2. System according to clause 1 , further comprising insulation material positioned in the floatable module, wherein preferably the insulation material comprises buoyant elements.

[0086] 3. System according to any of the previous clauses, comprising at least one modular wall element, positioned at the circumference of the floatable platform, in particular forming a circumferential side wall.

[0087] 4. System according to clause 3, wherein each wall element is coupled to the floatable platform under an angle greater than 0 degrees, preferably 90 degrees.

[0088] 5. System according to clause 3 or 4, wherein at least one wall element is coupled to the floatable platform under an angle greater than 0 degrees, preferably 90 degrees.

[0089] 6. System according to any of the clauses 3-5, wherein at least one wall element is coupled to the floatable platform under an angle greater than 90 degrees, preferably in between 90-170 degrees, more preferably in between 100-150 degrees, even more preferably in between 110-140 degrees.

[0090] 7. System according to any of the clauses 3 - 6, wherein the foundation element is concrete, and wherein the at least one wall element forms a circumferential side wall around the floatable platform, and wherein insulation material is positioned in between the at least one concrete element and the outside wall.

[0091] 8. System according to any of the clauses 2 - 7, wherein the foundation element is concrete, and wherein at least part of the concrete is in direct contact with the insulation material or wherein at least part of the concrete is poured over or encapsules the insulation material.

[0092] 9. System according to clause 8, wherein the insulation material comprises insulation blocks which blocks are stacked within a module, in particular forming a formwork for at least one concrete foundation element. 10. System according to any of the clauses 2 - 9, wherein the insulation material is chosen from the group consisting of: polystyrene, expanded polystyrene and / or biofoam.

[0093] 11 . System according to any of the previous clauses, wherein the foundation element at least partly is made from foamed concrete.

[0094] 12. System according to any of the previous cl clauses aims wherein the coupling between two adjacent floatable floor elements is established by coupling all of the mutually adjacent side edges only.

[0095] 13. System according to any of the previous clauses, wherein multiple floor elements and / or wall elements are coupled by a connection chosen from the group of: welding, gluing, screwing, bolting, male-female click profile, steel clamps or cables / rods that can be integrated with rebar for the concrete or the like.

[0096] 14. System according to any of the previous clauses, wherein the floor elements and / or wall elements are connected by concrete.

[0097] 15. System according to any of the previous clauses, wherein each floor element and / or wall element is provided with integrated coupling elements, preferably such that the coupling elements are integrated in the circumferential side edge.

[0098] 16. System according to any of the previous clauses, wherein each module, preferably each floor element and / or each wall element, is provided with internal reinforcement ribs.

[0099] 17. System according to any of the previous clauses, wherein each floor element and / or wall element is provided with reinforcement ribs and wherein the reinforcement ribs are positioned on the internal bottom side of each floor and / or wall element, preferably wherein at least part of the internal reinforcement ribs extends in between and up to two opposite side edges. 18. System according to any of the previous clauses, wherein each module is provided with reinforcement ribs, which are positioned on the internal side of the side edges of each floor element and / or wall element.

[0100] 19. System according to any of the previous clauses 3 - 18, comprising multiple wall elements forming a circumferential side wall, wherein the circumferential side wall has a height of at least 50 centimetres, preferably at least 1 meter with respect to the water level.

[0101] 20. System according to any of the previous clauses, wherein the coupling between two adjacent floatable floor elements is at least a coupling of the upper parts of at least two adjacent side edges.

[0102] 21 . System according to any of the previous clauses, wherein the casing of the floor element is composed out of a polymer, for example HDPE, ABS or LDPE.

[0103] 22. System according to any of the previous clauses, wherein each module comprises a circumferential wall which circumvent the floatable platform, wherein the circumferential wall is at least partially composed out of a composite and / or wherein the casing of the floor element is at least partially composed out of a composite.

[0104] 23. System according to any of the previous clauses, wherein the each module comprises a circumferential wall which circumvent the floatable platform, wherein the circumferential wall is at least partially composed of wood and / or wherein the casing of the floor element is at least partially composed of wood.

[0105] 24. System according to any of the previous clauses, wherein the foundation element comprises reinforced concrete.

[0106] 25. Subassembly of at least two coupled floating floor elements for forming part of a module for use in a floating system according to any of the clauses 1 - 24. Floating city comprising

[0107] - multiple floating floatable systems according to any of the clauses 1 - 24 which provide foundations for construction elements; and

[0108] - multiple construction elements, wherein the construction elements comprise at least one road and at least one building,

[0109] - in particular wherein multiple floating floatable systems are mutually connected. Method for constructing a floating system for providing at least part of a foundation for a construction on water, in particular a floatable system according to any of the clauses 1- 24, comprising the steps of:

[0110] A) creating at least one floating module on the water level, said floating module comprising at least multiple modular floatable floor elements, each floor element comprising a casing having a bottom floor and a circumferential side edge, which side edge protrudes from the bottom floor, wherein the floor elements are mutually couplable on the water level;

[0111] B) mutual coupling of at least two adjacent side edges of at least two adjacent floatable floor elements for forming a floatable platform, preferably while floating on the water level and / or lying beside the water level;

[0112] C) placing and coupling modular wall elements to the floatable platform, preferably floating floatable platform, forming a circumferential side wall,

[0113] D) creating a formwork, preferably by placing temporary panels or by positioning insulation material in a predefined manner on the formed platform from step B); and

[0114] E) pouring concrete in the formwork created in step D) Method according to clause 27, further comprising step F) placing insulation material within or on the floatable modules, preferably while the floatable modules are floating. Method according to clause 28, wherein the insulation material in step F) comprises insulation blocks. 30. Method according to any of the clauses 27-29, wherein the insulation material is a buoyant material.

[0115] 31 . Method according to any of the clauses 27-30, wherein after step E) the method comprises the step of pouring a concrete top layer.

[0116] 32. Method according to any of the clauses 27-31 , wherein multiple floatable modules are mutually coupled and wherein the coupling between two adjacent floatable modules is at least a coupling of two adjacent floor modules and / or a coupling of two adjacent wall modules, in particular wherein the coupling is made while the adjacent floatable modules are afloat.

[0117] The invention will be further elucidated by the following non-limitative figures, wherein

[0118] - Fig. 1 shows a schematic cross-section of an embodiment of a system according to the present invention, comprising two modules;

[0119] - Fig. 2a shows a schematic cross section of a first embodiment of a system comprising one module according to the present invention

[0120] - Fig. 2b shows a schematic cross section of a second embodiment of a system comprising one module according to the present invention;

[0121] - Fig. 3 shows an embodiment of a subassembly 21 , for forming part of a system according to the present invention;

[0122] - Fig. 4 shows a schematic perspective view on a cross section of several embodiments of a system according to the present invention;

[0123] - Fig. 5 shows a perspective view of a site where the (construction) method according to the present invention is performed; and

[0124] - Fig. 6 shows a perspective view on an embodiment of a floating city according to the present invention.

[0125] Figure 1 shows a cross section of an embodiment of a system 100 according to the present invention. The shown system 100 comprises two floatable modules 101 , 111 . A more detailed view of embodiments of a module are shown in figures 2a and 2b respectively. The system 100 shown comprises two floatable modules 101 , 111.

[0126] In practice, typically multiple floating modules are part of the system according to the present invention. It is also possible to couple multiple systems.

[0127] Each module 101 comprises multiple floatable modular floor elements 103, each floor element 103 comprising a casing 130 having a bottom floor 131 and a circumferential side edge 132, which side edge protrudes from the bottom floor, Each module 101 , 111 comprises a concrete foundation element 105 for providing at least part of a foundation for a construction. In each module 101 , 111 , multiple floatable floor elements 103 are positioned next to each other forming a floatable platform 106. Adjacent floatable floor elements 103 are mutually coupled. In the shown embodiment the coupling between two adjacent floating floor elements 103 is a coupling of two adjacent side edges. Other elements shown are a side wall 107. The angle between the side wall 107 and the floatable platform 106 is substantially 90 degrees in the shown embodiment. In each module 101 , 111 insulation material 108 is present. The insulation material 108 is positioned in between the side wall 107 and the concrete foundation element 105. Preferably the insulation material 108 comprises foamed blocks of insulation material.

[0128] Preferably the modules 101 , 111 are mutually coupled. This can for example be done at the adjacent side walls 107 and / or by coupling the floatable platforms 106.

[0129] Figure 2a shows a cross section of a first embodiment of a system according to the present invention for providing a foundation for a construction 2, comprising one module 1 . The embodiment shows three floatable modular floor elements 3a, 3b, 3c, which are mutually coupled at their (mutually) adjacent side edges 4 to form a floatable platform 6. Floor elements 3a and 3b are adjacent and mutually coupled at their adjacent side edges. Floor elements 3b and 3c are adjacent and mutually coupled at their adjacent side edges. Floor elements 3c and 3a are not adjacent and do not share a side edges, so in this embodiment using only couplings at side edges these floor elements 3a and 3b are indirectly coupled by the coupled floor element 3b in between them. Together forming a floatable platform 6. The embodiment shown comprises a circumferential side wall 7, which is schematically shown here as being not aligned with the platform circumferential side edge. However in practice the circumferential side edge of the platform 6 will be aligned with the circumferential side wall 7. Insulation material 8 is positioned on the modules 3a, 3b, 3c. The insulation material, in the example insulation panels are from a buoyant (ideally closed cell) material. The circumferential side wall 7 is composed of multiple modular wall elements. The platform 6 is provided with optional corner elements 6a. The corner elements 6a connect the floor elements 3a, 3c that are at the side of the platform 6 to the respective wall elements 7.

[0130] The embodiment shown comprises a concrete foundation element comprising a bottom element 5a and side elements 5b, forming a foundation element 5. The foundation element 5 is in contact with the insulation material 8. The foundation element 5 is preferably poured onto the insulation material 8 and afterwards a temporary formwork is built to pour in the side elements 5b. During the pouring some of the concrete will penetrate the porous structure of the insulation material 8.

[0131] The embodiment of the system comprising one module 1 is further provided with a connection element 9 for connecting adjacent systems or adjacent modules to each other.

[0132] Figure 2b shows a cross section of a second embodiment of a system, comprising another embodiment of a module 11 , according to the present invention for providing a foundation for a construction 12. The embodiment shows three modular floor elements 13a, 13b, 13c, which are mutually coupled at their adjacent side edges 14 to form a platform 16. Floor elements 13c and 13a are not adjacent and do not share a side edges, so in this embodiment using only couplings at side edges these floor elements 13a and 13b are indirectly coupled by the coupled floor element 13b in between them. Together forming a floatable platform 6. The embodiment shown comprises a circumferential side wall 17, which is schematically shown here as being not aligned with the platform circumferential side edge. However, in practice the circumferential side edge of the platform 16 is preferably aligned with the circumferential side wall 17. The platform 16 is provided with optional corner elements 16a. The corner elements 16a connect the floor elements 13a, 13c that are at the side of the platform 16 to the respective wall elements 17. The embodiment shown comprises insulation blocks 18, which together forms a formwork for the concrete element 15. The insulation blocks are from a buoyant material. The circumferential side wall comprises multiple modular wall elements which are mutually coupled.

[0133] The embodiment shown comprises a foundation element 15 comprising concrete beams 15a and a concrete top layer 15b, forming a part of the foundation for the construction 12. The concrete foundation element 15 is preferably poured onto the insulation blocks 18.

[0134] The embodiment of the module 11 is further provided with a connection element 19 for connecting adjacent systems to each other.

[0135] Figure 3 shows an embodiment of a subassembly 21 , forming part of a system according to the present invention, before concrete is applied. This embodiment of a subassembly 21 comprises multiple floatable (floating) modular floor elements 23, each comprising a casing having bottom floor 23a and an upwardly protruding circumferential side edge 23b. The modular floor elements 23 that are positioned adjacent to each other are coupled and as such forming a floatable platform 26 floating on water 20. The adjacent floor elements 23 are coupled at their adjacent side edges 24. The shown embodiment is provided with a circumferential side wall 27. The side wall 27 protrudes upwards from the circumference of the platform 26. This part of the subassembly 21 can be used for forming either an embodiment of the system 1 as shown in figure 1 or an embodiment 11 as shown in figure 2.

[0136] Figure 4 shows a cross section of various embodiments of the system according to the present invention in water 40. A first embodiment 41 as from figure 1 and a second embodiment 42 as from figure 2 are shown. The figure shows that the circumferential side wall 47 may have different heights depending on the construction built on top of the system according to the present invention. For less heavy loads such as pathways 45 or roads the circumferential wall is less high than for the system providing at least part of the foundation for a building 44. The figure further shows that the systems 42a, 42b, 42c are mutually connected. This connection can for example be made by a connection element as was shown in figures 2a and 2b. This enables a solid connection between the pathway 45 to the building 44. Figure 5 shows an embodiment of a construction site 50 for performing the method according to the present invention. The construction takes place on shore 50a and in water 50b. At the construction site 50 several stages of construction are shown. The modular floor elements 53 are transported and stacked before they are used. In the first stage subassemblies 51 of coupled floor elements 53 are assembled on shore, wherein the modules are coupled at their edges 54. The subassemblies 51 are put in the water 50b and at the water level assembled to form a platform 56. The subassemblies 51 are coupled at the side edges 54 of the adjacent modules 53. In the shown embodiment also a circumferential side wall 57 is placed on the platform 56. On the platform 56 insulation material 58 is placed onto the bottom floors 53a of the modules 53. In the second stage concrete is poured from the shore 50a onto the insulation material forming a concrete foundation element 55. In the figure the temporary elements for creating a formwork are shown in the figure.

[0137] In the last stage a construction 52 is put on the foundation formed by the system according to the present invention.

[0138] Figure 6 shows an embodiment of a floating city 60, which comprises multiple floating systems 61 providing foundations for multiple construction elements 62. In the floating city multiple systems are connected, for example to connect a garden with a house, preventing them to float apart.

[0139] The above-described inventive concepts are illustrated by several illustrative embodiments. It is conceivable that individual inventive concepts may be applied without, in so doing, also applying other details of the described example. It is not necessary to elaborate on examples of all conceivable combinations of the abovedescribed inventive concepts, as a person skilled in the art will understand numerous inventive concepts can be (re)combined in order to arrive at a specific application.

[0140] The verb “comprise” and conjugations thereof used in this patent publication are understood to mean not only “comprise”, but are also understood to mean the phrases “contain”, “substantially consist of”, “formed by” and conjugations thereof. The word ‘construction’ used in this patent publication are understood to mean not only ‘construction’, but also ‘structures’, ‘construction structures’ and conjugations thereof are meant.

Claims

Claims1 . Floatable system for providing a modular foundation for a construction on water, comprising:- at least one floatable module, each module comprising:■ multiple floatable modular floor elements, each floor element comprising a casing having a bottom floor and a circumferential side edge, which side edge protrudes from the bottom floor, o at least one, preferably concrete, foundation element for providing at least part of a foundation for a construction; wherein multiple floatable floor elements are positioned next to each other forming a floatable platform; wherein adjacent floatable modular floor elements are mutually coupled; and wherein the coupling between two adjacent floatable modular floor elements is at least a coupling of two adjacent side edges.

2. System according to claim 1 , further comprising insulation material positioned in the floatable module, wherein preferably the insulation material comprises buoyant elements.

3. System according to any of the previous claims, comprising at least one modular wall element, positioned at the circumference of the floatable platform, in particular forming a circumferential side wall.

4. System according to claim 3, wherein at least one wall element, preferably each wall element, is coupled to the floatable platform under an angle greater than 0 degrees, preferably 90 degrees.

5. System according to claim 3 or 4, wherein at least one modular wall element comprises a height that is bigger than the height of the circumferential side edge of at least one floor element.

6. System according to any of the claims 3-5, wherein at least one wall element is coupled to the floatable platform under an angle greater than 90degrees, preferably in between 90-170 degrees, more preferably in between 100-150 degrees, even more preferably in between 110-140 degrees.

7. System according to any of the claims 3 - 6, wherein the foundation element is concrete, and wherein the at least one wall element forms a circumferential side wall around the floatable platform, and wherein insulation material is positioned in between the at least one concrete element and the outside wall.

8. System according to any of the claims 2 - 7, wherein the foundation element is concrete, and wherein at least part of the concrete is in direct contact with the insulation material or wherein at least part of the concrete is poured over or encapsules the insulation material.

9. System according to claim 8, wherein the insulation material comprises insulation blocks which blocks are stacked within a module, in particular forming a formwork for at least one concrete foundation element.

10. System according to any of the claims 2 - 9, wherein the insulation material is chosen from the group consisting of: polystyrene, expanded polystyrene and / or biofoam.11 . System according to any of the previous claims, wherein the foundation element at least partly is made from foamed concrete.

12. System according to any of the previous claims wherein the coupling between two adjacent floatable floor elements is established by coupling all of the mutually adjacent side edges only.

13. System according to any of the previous claims, wherein multiple floor elements and / or wall elements are coupled by a connection chosen from the group of: welding, gluing, screwing, bolting, male-female click profile, steel clamps or cables / rods that can be integrated with rebar for the concrete or the like.System according to any of the previous claims, wherein the floor elements and / or wall elements are connected by concrete. System according to any of the previous claims, wherein each floor element and / or wall element is provided with integrated coupling elements, preferably such that the coupling elements are integrated in the circumferential side edge. System according to any of the previous claims, wherein each module, preferably each floor element and / or each wall element, is provided with internal reinforcement ribs. System according to any of the previous claims, wherein each floor element and / or wall element is provided with reinforcement ribs and wherein the reinforcement ribs are positioned on the internal bottom side of each floor and / or wall element, preferably wherein at least part of the internal reinforcement ribs extends in between and up to two opposite side edges. System according to any of the previous claims, wherein each module is provided with reinforcement ribs, which are positioned on the internal side of the side edges of each floor element and / or wall element. System according to any of the previous claims 3 - 18, comprising multiple wall elements forming a circumferential side wall, wherein the circumferential side wall has a height of at least 50 centimetres, preferably at least 1 meter with respect to the water level. System according to any of the previous claims, wherein the coupling between two adjacent floatable floor elements is at least a coupling of the upper parts of at least two adjacent side edges. System according to any of the previous claims, wherein the casing of the floor element is composed out of a polymer, preferably a thermoplastic polymer and / or polyolefin, for example HDPE, ABS or LDPE.

22. System according to any of the previous claims, wherein the casing of the floor element is composed out of a metal or wherein the casing of the floor element is composed out of concrete or a combination thereof.

23. System according to any of the previous claims, wherein each module comprises a circumferential wall which circumvent the floatable platform, wherein the circumferential wall is at least partially composed out of a composite and / or wherein the casing of the floor element is at least partially composed out of a composite.

24. System according to any of the previous claims, wherein the each module comprises a circumferential wall which circumvent the floatable platform, wherein the circumferential wall is at least partially composed of wood and / or wherein the casing of the floor element is at least partially composed of wood.

25. System according to any of the previous claims, wherein the foundation element comprises reinforced concrete.

26. System according to any of the previous claims, wherein at least two side edges of at least one, preferably each, floor element are positioned at an angle with respect to the bottom floor such that multiple floor elements are stackable.

27. System according to any of the previous claims, wherein the floor elements are tray-shaped.

28. Subassembly of at least two coupled floating floor elements for forming part of a module for use in a floating system according to any of the claims 1 - 27.

29. Floating city comprising- multiple floating floatable systems according to any of the claims 1 - 27 which provide foundations for construction elements; and- multiple construction elements, wherein the construction elements comprise at least one road and at least one building,in particular wherein multiple floating floatable systems are mutually connected. Method for constructing a floating system for providing at least part of a foundation for a construction on water, in particular a floatable system according to any of the claims 1 - 27, comprising the steps of:A) providing multiple modular floatable floor elements for creating at least one floating module on the water level, said floating module comprising at least multiple modular floatable floor elements, each floor element comprising a casing having a bottom floor and a circumferential side edge, which side edge protrudes from the bottom floor, wherein the floor elements are mutually couplable on the water level;B) mutual coupling of at least two adjacent side edges of at least two adjacent floatable floor elements for forming a floatable platform, preferably while floating on the water level and / or lying beside the water level;C) placing and coupling modular wall elements to the floatable platform, preferably floating floatable platform, forming a circumferential side wall,D) creating a formwork, preferably by placing temporary panels or by positioning insulation material in a predefined manner on the formed platform from step B); andE) pouring concrete in the formwork created in step D) Method according to claim 30, further comprising step F) placing insulation material within or on the floatable modules, preferably while the floatable modules are floating. Method according to claim 31 , wherein the insulation material in step F) comprises insulation blocks. Method according to any of the claims 30-32, wherein the insulation material is a buoyant material. Method according to any of the claims 30-33, wherein after step E) the method comprises the step of pouring a concrete top layer.Method according to any of the claims 30-34, wherein multiple floatable modules are mutually coupled and wherein the coupling between two adjacent floatable modules is at least a coupling of two adjacent floor modules and / or a coupling of two adjacent wall modules, in particular wherein the coupling is made while the adjacent floatable modules are afloat.

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