NL2014298B1

NL2014298B1 - Construction having foundation with sliding interface.

Info

Publication number: NL2014298B1
Application number: NL2014298A
Authority: NL
Inventors: Johannes Hoorn Harm
Original assignee: Tiliaventus B V
Priority date: 2015-02-13
Filing date: 2015-02-13
Publication date: 2016-10-13
Also published as: EP3256649A1; WO2016130013A1

Abstract

A first aspect provides a construction a foundation comprising at least one foundation member having at least one supporting surface, the supporting surface being provided with a substantially horizontally oriented first sliding surface facing away from the supporting surface. The construction further comprises a structure comprising at least one structure base member provided with at least one supported surface, the supported surface being provided with a substantially horizontally oriented second sliding surface. The structure is provided on top of the foundation such that the second sliding surface is provided in direct contact with the first sliding surface. By providing a sliding construction rather than a resilient and fixed construction, earthquakes have less effect on the construction. Furthermore, a direct need for use of resilient materials is at least reduced, reducing the drawbacks of using such materials.

Description

CONSTRUCTION HAVING FOUNDATION WITH SLIDING INTERFACE TECHNICAL FIELD

The various aspects relate to providing foundations to buildings and in particular to providing foundations for reducing effects of earthquakes to the buildings

BACKGROUND

Foundations for buildings may be provided by means of foundation piles. This is used in areas where ground is not strong, solid and/or hard enough to provide a support for buildings. This building technique is known for centuries and used in for example Rotterdam and Amsterdam for a long time. Also at other locations where the natural underground is not considered solid enough, piles are used for foundations. Earlier buildings are built on wooden poles, whereas with the advent of concrete, concrete and preferably reinforced concrete is used. In case the underground was or is deemed strong enough to carry a building, a less deep foundation may currently be used. Such foundation may be established by depositing concrete, rubble or similar material in a ditch. The building to be built is subsequently built on the foundation thus established.

Earthquakes may cause significant harm to buildings. In regions known to have a significant earthquake risk, building are built taking into account specific measures. Such measures may be providing flexible and in particular resilient materials like rubber in the foundation and upper structure of the buildings as well as providing specific constructional measures. An issue with rubber is that the absorption of earthquake forces may not be sufficient for preventing most serious damages to buildings.

SUMMARY

It is preferred to provide another and preferably better way of providing building with a reduced risk of being damaged by earthquakes. A first aspect provides a construction a foundation comprising at least one foundation member having at least one supporting surface, the supporting surface being provided with a substantially horizontally oriented first sliding surface facing away from the supporting surface. The construction further comprises a structure comprising at least one structure base member provided with at least one supported surface, the supported surface being provided with a substantially horizontally oriented second sliding surface. The structure is provided on top of the foundation such that the second sliding surface is provided in direct contact with the first sliding surface.

Modern buildings mostly have a concrete foundation and foundations of older buildings may be provided in wood, rubble, brick, other or a combination thereof. The buildings provided on the foundation may be provided in various materials as well, including bricks and concrete. The building may be provided in a fixed way, for example by casting concrete for the building on the concrete foundation. Alternatively, the building is not rigidly fixed to the foundation. In the first case, no friction is possible between the building and the foundation. In the latter case, friction between the building and the foundation may be possible. In this case, the friction coefficient may vary over a wide range. The friction coefficient between two concrete surfaces may vary between 40% and 80%. Between surfaces of other materials, there is a variation as well. By providing dedicated sliding surfaces, the sliding coefficient may be provided at a more reproducible level.

By providing a sliding construction rather than a resilient and fixed construction, earthquakes have less effect on the construction. Furthermore, a direct need for use of resilient materials is at least reduced, reducing the drawbacks of using such materials.

In an embodiment, the structure base member comprises a floor of a building, the building being connected to the floor such that it may be supported by the floor. An advantage of this is that the foundation supports the floor and the rest of the building, like walls, does not need to be supported separately.

In another embodiment, the structure base member comprises at least one base support member; and the second sliding surface is provided on to the base support member, the base support member comprising the supported surface.

This embodiment allows for a larger freedom of design and construction of the structure base member.

In a further embodiment, the base support member is movably connected to at least one other part of the structure base member via at least one support connecting member enabling a substantially vertical movement of the base support member relative to the other part of the structure base member, further comprising at least one fixating element for fixating the base support member relative to the rest of the structure base member to substantially disable the vertical movement.

This allows the rest of the structure base member to be lifted to a desired level, at which level the base support member may be fixed relative to the rest of the structure base member by fixating the base support member relative to the rest of the structure base member.

In yet another embodiment, at least one of the first sliding surface and the second sliding surface comprises plastic and at least one of the first sliding surface and the second sliding surface comprises polytetrafluoroethylene.

Use of these materials allow for providing a durable sliding interface with a relatively constant friction coefficient. This, in turn, allows for improved and more accurate design of a building or other structure as part of the construction. A second aspect provides a method of providing a construction, the method comprising providing at least one foundation member having at least one supporting surface with a substantially horizontally oriented first sliding surface at the support surface, the first sliding surface facing away from the supporting surface and the foundation member being comprised by a foundation. The method further comprises providing a structure comprising at least one structure base member having at least one supported surface with a substantially horizontally oriented second sliding surface at the supported surface. The structure is provided on top of the foundation such that the second sliding surface is provided in direct contact with the first sliding surface.

An embodiment of the second aspect comprises: depositing a concrete floor as at least part of the structure base member and providing at least one support connecting member connected to the floor for movably connecting a base support member to the floor. The method further comprises movably connecting a base support member to the floor via the support connecting member, the base support member comprising the supported surface and the base support member being connected to the floor such that the supported surface if provided above the support surface, lifting the floor relative to the foundation member; and fixating the base support member relative to the floor to substantially disable the vertical movement of the base support member relative to the floor.

This method allows for efficient construction of a construction having reduced exposure to earthquakes. Not only for new buildings, but also for providing an improved foundation for existing buildings.

In another embodiment in which the structure further comprises at least one wall, the other embodiment comprises, prior to depositing the concrete, providing indentations in the wall at substantially the same level as the intended level of the floor.

This allows the concrete to flow in the indentations, below the wall. When the concrete has hardened, the walls will be lifted when the concrete floor is lifted.

BRIEF DESCRIPTION OF THE DRAWINGS

The various aspects and embodiments thereof will now be discussed in further detail in conjunction with Figures. In the Figures:

Figure 1: shows a house and a foundation as construction;

Figure 2: shows a part of a floor and a foundation pile;

Figure 3: shows a floor, a foundation pile and a two sliding modules;

Figure 4 A: shows a building site with a mould and foundation piles;

Figure 4 B: shows a floor with holes for foundation piles;

Figure 4 C: shows a building site with a floor and foundation piles;

Figure 5 A: shows a foundation pile with a floor, a support plate and an auxiliary plate;

Figure 5 B; shows a foundation pile with a floor and a support plate supported by the foundation pile;

Figure 6 A: shows a structure with an outer floor to be supported by a foundation pile;

Figure 6 B: shows a structure with an outer floor lifted and supported by auxiliary beams;

Figure 7 A: shows a wall and support beam supported by a foundation pile;

Figure 7 B: shows a cut foundation pile with two parts separated; and

Figure 7 C: shows a cut foundation pile with two sliding modules between the two parts.

DETAILED DESCRIPTION

Figure 1 shows a construction 100 comprising a house 130 as structure and a foundation 110 comprising a first foundation pile 112, a second foundation pile 114, a third foundation pile 116 and a fourth foundation pile 118 as foundation members.

The house 130 comprises a floor 120 as a structure base member or part thereof.

The house 130 is supported by the floor 120 and the floor is supported by the foundation 110.

At the right of Figure 1, a detail of the construction 100 is provided. The detailed view in Figure 1 shows a wall 132 of the house 130. The wall 132 is supported by the floor 120 that is in turn supported by the fourth foundation pile 118. Alternatively, the wall 132 is directly supported by the fourth foundation pile 118 and the floor 120 is supported by the wall 132.

Figure 2 shows another detail of the construction 100 of Figure 1. Figure 2 shows the floor 120 and the first foundation pile 112. The floor 120 is supported by the first foundation pile 112 by the virtue of a supporting surface 124 being provided at the top of the first foundation pile 112. The supporting surface 124 supports a supported surface 224 provided at the bottom side of the floor 120. The supporting surface 124 is provided with a first sliding module 220 having a first sliding surface 214. The supported surface 224 is provided with a second sliding module 210 having a second sliding surface 212. The first sliding surface 214 and the second sliding surface 212 are arranged to allow the floor 120 and with that, the house 130, to move horizontally relative to the foundation 110.

Figure 3 shows the first sliding module 220 and the second sliding module in further detail. Figure 3 shows the floor 120 and the first foundation pile 112. The first foundation pile 112 comprises a metal sheet 334 that is filled with concrete. On top of the first foundation pile 112, a topping plate 332 is provided. The first sliding module 220 comprises a rubber sheet 342, a stainless steel sheet 344 and a sliding layer 346 comprising polytetrafluoroethylene. The sliding layer 346 preferably comprises at least 3% of polytetrafluoroethylene. Alternatively, the sliding layer 346 comprises a higher ratio of polytetrafluoroethylene, at least 80%, up to 100%. The polytetrafluoroethylene may be provided as a layer to be fixed to Sliding modules are commercially available, like the Ciparall sliding support provided by Calenberg Ingenieure.

The first sliding module 220 is connected to the first foundation pile 112 by means of a bolt 322 in a substantially rigid way. The first sliding module 220 is provided with a recess for accommodating the head of the bolt 322. Alternatively, other fastening means like nails, screws, adhesives, other or a combination thereof may be used for affixing the first sliding module 220 to the first foundation pile 112.

The second sliding module 210 is connected to the floor 120 by means of a first screw 312 and a second screw 314. Alternatively, other fastening means like nails, screws, adhesives, other or a combination thereof may be used. The second sliding module 210 comprises a plastic that is preferably fibre reinforced, for example with glass fibres, carbon fibres, natural fibres, other or combination thereof. The plastic may comprise polyethylene, polypropylene, an acrylate polymer, other, or a combination thereof. Alternatively or additionally, the second sliding module comprises stainless steel. This steel plate is preferably provided in polished steel. And also other materials with a smooth surface may be used.

With the first sliding module 220 and the second sliding module 210 being provided according to any of the named alternatives or equivalents thereof, a low and in particular constant and reproducible friction factor may be achieved. In particular, with the second sliding module 210 being provided in fibre reinforced plastic and the first sliding module being topped with a vulcanised layer of polytetrafluoroethylene or a polymer having similar properties, a reproducible friction coefficient of approximately 5% may be achieved. If the layer of fibre reinforced plastic is replaced by a layer of polished stainless steel, a reproducible friction coefficient of approximately 3% may be achieved. A friction factor of less than 10% is preferred, where 5% is preferred in particular. In certain cases, however, a higher friction coefficient may be preferred. Such may be the case in very windy environments. The wind acting on the building may result in such force that the building may move as a result of the wind force, if the friction coefficient would be less than 15%. In such cases, a friction coefficient of 20% or even 25% may be preferred.

Figure 4 A shows a detail of a house 430 of which a foundation 410 is provided with sliding modules. The house 430 comprises wall 432. Figure 4 A shows an excavation 450 below the house 430, with a first foundation pile 412, a second foundation pile 414 and a third foundation pile 416 provided in the excavation 450 as part of a foundation 410. In the walls 432, indentations are provided. At a level of these indentations in the walls 432, also recesses are provided in the excavation 450 for providing open channels between the excavation 450 and the indentations in the walls 432.

At the bottom of the excavation 450, a mould 440 is provided. The mould 440 preferably comprises an insulating material like foam material. The mould 440 preferably has a substantially level top side to function as a mould to a floor to be deposited. Such floor is preferably deposited in concreted. While depositing the floor, additional moulds are provided around the foundation piles of the foundation 410 to provide indentations and through-holes in particular in the floor around the foundation piles.

Having provided the indentations in the walls 432, the mould 440 in excavation 450 and the additional moulds (not shown) around the foundation piles, a floor 420 as shown by Figure 4 B is deposited. The floor 420 comprises protrusions 460 that fit in the recesses created earlier in the walls 432. Between the protrusions 460, the walls 432 extend downwardly. In this way, the floor 420 is arranged to support the walls 432 by means of the protrusions provided under the walls 432. Figure 4 B also shows a first pile hole 422 with the first foundation pile 412 in it, a second pile hole 414 with the second foundation pile 414 in it and a third pile hole 416 with a third foundation pile 416 in it. Furthermore, Figure 4 B shows a fourth pile hole 422’ with a fourth foundation pile 412' in it, a fifth pile hole 424' with a fifth foundation pile 414' in it, a sixth pile hole 426' with a sixth foundation pile 416' in it, as well as a Seventh pile hole 422" with a seventh foundation pile 412" in it, an eighth pile hole 424" with an eighth foundation pile 414" in it and a ninth pile hole 426" with a ninth foundation pile 416" in it.

Figure 4 C shows a side view of the house 430 with the floor 420 having been deposited as described above. The floor 420 is provided under the walls 432, arranged to support the house 430. The mould 440 remains in this embodiment in the excavation 450, preferably to provide insulation to the house 430. In an alternatively embodiment, the mould 440 is removed. This may be particularly advantageous if a basement is preferred below the house 430. Furthermore, Figure 4 C shows the first pile hole 422 with the first foundation pile 412 in it, the second pile hole 424 with the second foundation pile 414 in it and the third pile hole 426 with a third foundation pile 416 in it. In the process description provided above, the floor 420 is deposited after the foundation piles have been drilled into the ground.

Alternatively, first the floor 420 is deposited with moulds for forming the pile holes. After that, the foundation piles are drilled into the ground. An advantage of this sequence is that any machinery for drilling the foundation piles into the ground may be supported by the floor 420.

With the floor 420 having been deposited on the mould 440 that rests on the bottom of the excavation 450 - the ground - and possibly partly directly on the ground, the floor 420 requires to be supported by the foundation piles of the foundation 410. Figure 5 A shows an arrangement for handling the floor 420 such that it is supported by the foundation piles.

Figure 5 A shows the floor 420 and the first foundation pile 412. On top of the foundation pile 412, the first sliding module 220 is provided. In the floor, a first reinforcement rod 552 and a second reinforcement rod 554 are provided as support connecting members. Towards the first pile hole 422, the first reinforcement rod 552 and the second reinforcement rod 554 are bent over substantially ninety degrees and protrude from the floor 420 in the vicinity of the first pile hole 422. In another embodiment, in total four reinforcement rods protrude from the floor 420.

Over the first pile hole 422, an iron support plate 550 is provided as base support member and part of the base support by which also the floor 420 is comprised. The support plate 550 should be strong enough to carry the floor 420, in case applicable together with other support plates provided to support the floor 420. For a common house, a thickness of approximately 3 centimetres would be preferred with a distance of about 3 metres between foundation piles. The support plate 550 is provided with holes for receiving the protruding rods. The protruding rods are in this embodiment provided with a thread and are provided with a first nut 572 and a fourth nut 578 on top of the support plate 550. The support plate 550 has the second sliding module 210 connected to it, with the second sliding surface facing down. As shows by Figure 5 A, the second sliding surface of the second sliding module 210 rests upon the first sliding surface of the first sliding module 220. In this way, the support plate 550 is supported by the first foundation pile 412. Room is provided between the floor 420 and the support plate 550.

Above the first nut 572 and the fourth nut 578, an iron auxiliary support plate 560 is provided as auxiliary support member. The auxiliary plate 560 is provided with holes for receiving the protruding rods. And above the above the auxiliary plate 560, a second nut 574 and a third nut 576 is provided for locking the auxiliary support plate 560 to the protruding rods.

Between the support plate 550 and the auxiliary support plate 560, a jack 590 is provided. With the auxiliary support plate 560 locked to the protruding rods by means of nuts, operation of the jack 590 will result in lifting of the floor 420 relative to the first foundation pile 412. In a building having multiple pile holes with foundation piles in it, each or at least most of the pile holes have an arrangement provided in the pile holes as depicted by Figure 5 A. this allows the floor 420 evenly to be lifted relative to the foundation 410 provided by the multitude of foundation piles. As the support plate 550 is not provided at a fixed location with respect to the floor 420, the support plate 550 will move and in particular lower relative to the floor 420.

With the floor 420 lifted to a desired level, the nuts provided directly above the support plate 550 are displaced downwardly to lock the support plate 550 at the desired level. This is depicted by Figure 5 B. In another embodiment, other fixating means are used. Such fixating means may be clamps of any kind, adhesives, welds, other, or a combination thereof. Subsequently, jack 590 is removed, as well as the auxiliary support plate 560. In multiple lifting arrangement are provided in the building 430, multiple auxiliary support plates 560 are removed. In order to provide a level field over substantially the full area of the floor 420, also the protruding rods may be removed at or below the level of the concrete part of the floor 420, as depicted by Figure 5 B. As a results, the structure base member comprising the floor 420 and the support plate 550 that carries the house 420 is supported by the foundation 410 and by the foundation piles in particular.

With the embodiments discussed in conjunction with Figures 4 and Figures 5, a floor was provided within a building. Figure 6 A shows another embodiment. Figure 6 A shows a part of another house 630 comprising a wall 632 and an inner floor 650. The inner floor 650 may comprise wood, concrete, another suitable building material or a combination thereof. Around the house 630, a preferably concrete outer floor 620 is provided. The outer floor 620 may be provided in a fashion similar to the process described above for providing a concrete floor inside a building. However, as the outer floor 620 is provided outside the house 630, an insulating mould may not be specifically preferred.

The outer floor 620 is provided such that at least part of the inner perimeter of the outer floor 620 is provided below the wall 632 and/or another part of the house 630. In the outer floor 620, a pile hole 622 is provided. In the pile hole 622, a foundation pile 612 is provided. The foundation pile 612 is provided with a sliding surface. The outer floor 620 and with that, the house 630, may be lifted to be supported by the foundation pile 612 and preferably additional piles by means of a process as described above in conjunction with Figure 5 A and Figure 5 B.

Figure 6 B shows an alternative way of providing sliding surfaces to the structure base of the house 630 and to a first foundation piles 612 and a second foundation piles 614. Preferably, the foundation piles are provided around the house 630 first. Subsequently, the outer floor 620 is provided around the house 630. This may be done around the full perimeter of the house 630. Alternatively, this is done around part of the perimeter of the house 630. The outer floor 620 is provided such that it is arranged for supporting the house 630.

Under the outer floor 620 and with that, under the house 630, one or more carrying beams 680 are provided for lifting the house 630. Between the carrying beam 680 and a ground level 602, a first jack 692 and a second jack 694 are provided. Near each end of the carrying beam 680, one jack is provided. The house 630 may be lifted by means of the jacks and sliding surfaces may be provided between the supporting surface of the foundation piles and the supported surface of the outer floor 620 as discussed above. With the sliding surfaces in place, the outer floor 620 is lowered such that first sliding surfaces and second sliding surfaces are brought in contact with one another. Subsequently, the carrying beam 612 may be removed.

Whereas the embodiments discussed above mainly relate to providing sliding surfaces to new foundation piles, also existing foundation piles may be provided with sliding surfaces. Figure 7 A shows a part of a house comprising an outer wall 732, an inner wall 734 and a cavity 736 in between. The outer wall 732 and the inner wall 734 are supported by a support beam 740. The support beam 740 is preferably provided in concrete. The support beam 740 is in turn supported by a first foundation pile 712. Whereas shows a cavity between the outer wall 732 and the inner wall 734, it is noted the method discussed below may also be applied to single or massive walls without such cavity.

Figure 7 B shows the first foundation pile 712 being divided in two parts. The upper part has an upper auxiliary support 752 connected to it and the lower part has a lower auxiliary support 754 connected to it. Between the upper auxiliary support 752 and the lower auxiliary support 754, a first jack 792 and a second jack 794 have been provided. With the upper auxiliary support 752 and the lower auxiliary support 754 arranged to support the support beam 740 and the structure provided thereon, the first jack 792 and the second jack 794 are used to lift the support beam 740 and the structure provided thereon and provide a gap between the upper part of the first foundation pile 712 and the lower part of the first foundation pile 712.

Using the gap thus created, and as shown by Figure 7 C, a first sliding module 720 may be provided to the lower part of the first foundation pile 712 and a second sliding module 710 may be provided to the upper part of the first foundation pile. Subsequently, the upper auxiliary support 752 and the lower auxiliary support 754 may be removed. Alternatively, the second sliding module 710 is provided on a lower surface of the upper auxiliary support 752 and first sliding module 720 is provided on an upper surface of the lower auxiliary support 754. In this embodiment, the upper auxiliary support 752 and the lower auxiliary support 754 are not removed.

In embodiments thus far, providing the sliding surfaces to the Supporting surfaces of the foundations and to the supported surfaces of the structure base members has been presented as being performed by providing separate sliding modules. Alternatively, the actual surfaces of the foundation piles and of the floor or the support plates may be treated to act as sliding surfaces. A disadvantage is that this may reduce flexibility of construction and choice of materials, but it may be a viable option in certain scenarios.

In other embodiments, the inner and/or outer floor are not or at least not only comprised of concrete. Instead or additionally, the floor as part of the structure base member is provided in wood, iron, other or a combination thereof. This requires a slightly different approach, as most wooden floor are provided in planks with a thickness of about 2 centimetres. These planks are in turn supported by floor support beams having a significantly larger thickness. The planks are not suitable to have the base support members - the plates for being supported by the foundation piles -connected to them, as these planks would usually break. In such case, the floor support beams are to have base support members connected to them or they directly provide a supported surface having a second sliding surface provided on it.

Expressions such as "comprise", "include", "incorporate", "contain", "is" and "have" are to be construed in a non-exclusive manner when interpreting the description and its associated claims, namely construed to allow for other items or components which are not explicitly defined also to be present. Reference to the singular is also to be construed in be a reference to the plural and vice versa.

In the description above, it will be understood that when an element such as layer, region or substrate or components of a system are referred to as being "on", "onto" or "connected to" another element, the element is either directly on or connected to the other element, or intervening elements may also be present.

Furthermore, the invention may also be embodied with less components than provided in the embodiments described here, wherein one component carries out multiple functions. Just as well may the invention be embodied using more elements than depicted in the Figures, wherein functions carried out by one component in the embodiment provided are distributed over multiple components. A person skilled in the art will readily appreciate that various parameters disclosed in the description may be modified and that various embodiments disclosed and/or claimed may be combined without departing from the scope of the invention.

It is stipulated that the reference signs in the claims do not limit the scope of the claims, but are merely inserted to enhance the legibility of the claims.

Claims

A structure comprising: A foundation comprising at least one foundation part with at least one supporting surface, the supporting surface being provided with a substantially horizontally oriented first sliding surface that is directed away from the supporting surface; A structure comprising at least one structural base part provided with at least one supported surface, which supported surface is provided with a substantially horizontally oriented second sliding surface; wherein the structural base member comprises at least one base support member; and The base support member comprises the second sliding surface and the supported surface and wherein the structure is placed on the foundation such that the second sliding surface is provided in direct contact with the first sliding surface, characterized in that the base support member is movably connected to at least another part of the structural base part via at least one support connecting part which allows a substantially vertical movement of the basic support part relative to the other part of the structural base part and further comprising at least one fixing element for fixing the basic support part relative to the other part of the structural base part to substantially prevent vertical movement.

A structure according to claim 1, wherein the structural base part comprises a floor of a building, which building is connected to the floor such that the building can be supported by the floor.

The structure of claim 1, wherein the structural base member comprises at least one opening and the base support member is provided in the opening.

The structure of claim 1, further comprising an auxiliary support member connected to the structural base member, which auxiliary support member is connected to the support connecting member and adapted to support the structural base member.

The structure of any one of claims 1 to 4, wherein: the support connecting part comprises a substantially vertically oriented rod-forming element with a screw thread, which rod-shaped element projects upwards from the structural base part; The base support member comprises a substantially horizontally oriented plate member with at least one hole to pass the rod-shaped element; and the fixing element a nut is provided on the thread of the rod-shaped element above the plate part.

6. Construction as claimed in any of the foregoing claims, wherein the foundation part is provided with a first sliding module comprising the first sliding surface, which first sliding module is connected to the foundation part in a substantially fixed manner.

7. Construction as claimed in any of the foregoing claims, wherein the structural base part is provided with a second sliding module comprising the second sliding surface, which second sliding module is connected to the structural base part in a substantially fixed manner.

A construction as claimed in any one of the preceding claims, wherein the coefficient of friction between the first sliding surface and the second sliding surface is less than 25%.

A construction as claimed in any one of the preceding claims, wherein: at least one of the first sliding surface and the second sliding surface comprises plastic; and At least one of the first sliding surface and the second sliding surface comprises polytetrafluoroethylene.

The structure of claim 9, wherein the plastic is fiber-reinforced plastic.

The structure of claim 9 or 10, wherein the first sliding surface comprises at least 3% polytetrafluoroethylene.

12. Method for manufacturing a construction, the method comprising: At least one foundation part comprising at least one supporting surface provided with a substantially horizontally oriented sliding surface on the supporting surface, which first sliding surface is directed away from the supporting surface and which foundation part is covered by a foundation; A structure comprising at least one structural base part comprising at least one supported surface provided with a second sliding surface on the supported surface; and Placing the structure on the foundation such that the second sliding surface is placed on the first sliding surface and in direct contact with the first sliding surface, further comprising: Pouring a concrete floor as at least a part of the structural base part; Supplying at least one support connecting part connected to the floor to movably connect the supporting connecting part to the floor; Movable connection of a base support member to the floor via the support connecting member, which base support member comprises the supported surface and which base support member is connected to the floor such that the supported surface is provided above the supporting surface; Lifting the floor relative to the foundation part; and Fixing the base support member relative to the floor to substantially prevent vertical movement of the base support member relative to the floor, further characterized by the steps of: Connecting an auxiliary support member to the floor via the support connecting member for supporting the floor; and Lifting the floor by means of the auxiliary support parts.

The method of claim 12, wherein the auxiliary support member is provided above the base support member, the method further comprising: Providing a jack between the base support member and the auxiliary support member; and Lifting the floor by operating the auger. A method according to any of claims 12 to 13, wherein the structure further comprises at least one wall, the method further comprising, for pouring the concrete, making notches in the wall at substantially the same level as the anticipated level of the floor.

Method according to one of claims 12 to 14, further comprising, for pouring the concrete, placing a formwork at the provided level of the underside of the floor.

The method of claim 15, wherein the formwork comprises an insulating material.