SE1451067A1

SE1451067A1 - House foundation system and method of forming a house foundation

Info

Publication number: SE1451067A1
Application number: SE1451067A
Authority: SE
Inventors: John Höglund; Peter Lindqvist
Original assignee: Get Ab
Priority date: 2014-09-15
Filing date: 2014-09-15
Publication date: 2016-03-16
Also published as: WO2016043641A1; PL3194664T3; PT3194664T; ES2906575T3; EP3194664A1; EP3194664A4; CY1125407T1; EP3194664B1; HUE057789T2; SI3194664T1; DK3194664T3; LT3194664T; HRP20220221T1

Description

15 20 25 30 Concrete ground to get a Ieveled foundation is thereby avoided. The time needed for providing a ready, dried house foundation may thereby be significantly shortened. ln an uneven excavation, the support members may stand directly on the excavation bottom or on support plates arranged on the excavation bottom. Each support member may be configured to provide a height-adjustability of a section of the frame which may be adjusted to provide a Ieveled upper surface of the frame. The frame may in one embodiment comprise at least four support members, each arranged at a corner, or adjacent to a corner, of the frame. The frame may further comprise additional support members on other sections of the frame to provide a more accurate height-adjustabiiity to level the frame. ln one embodiment, each height-adjustable support member may comprise a threaded spindle or screw arranged in a corresponding threaded hole in the frame.

The spindle may be rotated to raise or lower the frame when standing on ground.

The holes may extend through the frame. A threaded spindle arranged in such hole may then extend both below and above the frame when standing on ground. The spindle may thereby be accessed from above for height-adjustment when the foundation frame is arranged in an excavation. The hole may be made in the pre- casted frame. ln a further embodiment, the foundation frame may be made of light ballast concrete. The ballast in the light ballast concrete may be foam glass, lightweight- expanded aggregate, pumice or the like, such as other ceramic material. Such light ballast concrete may provide insulating properties to the frame and the house foundation system. ln another embodiment, the house foundation system may comprise an insulating and draining granulate material. Such material may be used for filling the frame when arranging the house foundation system in an excavation. Such insulating and draining granulate material may be foam glass, lightweight-expanded aggregate, pumice or the like. Such materials may both provide an insulating function and a draining function to the house foundation. Such material may further be nonorganic, thereby providing a house foundation system free from organic material. ln a further embodiment, the foundation frame may be formed by frame modules connected by connection elements. A frame in modules may be easier to arrange on an excavation bottom. Connection elements may be arranged at the ends 10 15 20 25 30 of the modules to interconnect modules. The connection elements may be integrated with the location of the support members.

The house foundation system may further comprise a channel system for drying the foundation when arranged in an excavation using underpressure. The channel system may comprise a channel formed in the granulate materiel, a perforated tube or hose arranged in the granulate material. The channel system may be connected to a dehydrator arrangement configured to provide an underpressure in the channel system and thereby enable extraction of humidity in the foundation.

Humldity in the foundation may thereby be drawn towards the channel system and extraoted through the channel system. ln one embodiment may a first section of the channel system be configured to provide a flow of dry air into the foundation, and a second section of the channel system may be configured to extract air from the foundation, thereby extracting humidity in the foundation.

According to a second aspect of the invention, a method of forming a house foundation is provided, wherein the method comprises the steps of arranging a foundation frame on an excavation bottom, filling the excavation with an insulating and draining granulate material, and providing a ground plate supported by said foundation frame. Such method may provide a way of forming a house foundation which without organic material provides good insulation, draining and stability properties. The foundation frame and/or the ground plate may be prefabricated, thereby facilitating and speeding up the foundation formation. ln one embodiment, the granulate material may be foam glass, lightvveight- expanded aggregate, pumice or the like. Such materials have good insulating and draining properties. The materials are further nonorganic, which is an advantage when it comes to preservation of the foundation over time. ln another embodiment, the method further comprises a step of arranging a capillary barrier on the excavation bottom. The capillary barrier may be arranged for preventing humidity from the ground to reach the granulate material on top of the capillary barrier. ln a further embodiment, the method may comprise a step of providing a channel system below the granulate material for drying the foundation using underpressure. The channel system may be configured for connection to a dehydrator arrangement. The channel system with the dehydrator may be arranged for extraction of humidity in the foundation using underpressure in the channel 10 15 20 25 30 system. The method for forming a house foundation may further comprise a step of extracting humidity from the house foundation by providing underpressure in said channel system. ln one embodiment, the ground plate may comprise light ballast Concrete. The ballast in the light ballast concrete ground plate may be foam glass, lightweight- extracted aggregate, pumice or the like. A ground plate of such material may provide good both insulating and draining properties. Alternatively, the ground plate may be made of foam Concrete. ln another embodiment, the method may further comprise a step of providing a support casting of the foundation and/or the ground plate. After the granulate material has been provided in the excavation, and packed therein, the foundation frame may be fixed in place in the excavation. The ground plate may then be fixed in position on the foundation frame by providing a support casting between the ground plate and the foundation frame. The ground plate may thereby be fixed in position relative to the frame. The support casting may be provided using light concrete, foam concrete or light ballast concrete using foam glass, lightweight-extracted aggregate or pumice as ballast. The support casting may be provided such that it extends through couplings between frame modules. The support casting may further extend towards the ends of support members by which the foundation frame stands on the excavation bottom. Further, support casting may be provided in a space between the granulate material within the foundation frame and the ground plate arranged on the foundation frame. ln a further embodiment, the foundation frame may comprise a plurality of height-adjustable support members, adjustable to provide a leveled foundation frame on an uneven excavation bottom. The method may then further comprise a step of adjusting the support members to provide a leveled foundation frame arranged on the excavation bottom. Such frame may provide arrangement in a leveled manner using the height-adjustable support members, thereby providing a facilitated house foundation forming method.

Brief Description of the Drawinqs The invention will in the following be described in more detail with reference to the enclosed drawings, wherein: 10 15 20 25 30 Fig. 1 is a perspective view of a house foundation system according to an embodiment of the invention, Fig. 2 is a cross-sectional view of a house foundation system according to an embodiment of the invention, Fig. 3 is a cross-sectional view of a house foundation system according to an embodiment of the invention, Fig. 4 is a cross-sectional view of a house foundation system according to an embodiment of the invention, Fig. 5 is a cross~sectional view of a house foundation system according to an embodiment of the invention, Fig. 6 is a cross-sectional view of a house foundation system according to an embodiment of the invention, and Fig. 7 is a block scheme of a method according to an embodiment of the inven?on.

Description of Embodiments The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. ln the drawings, like numbers refer to like elements.

Figs. 1-3 illustrate a house foundation system 1 comprising a foundation frame 10 according to an embodiment of the invention. The foundation frame 10 is arranged in an excavation 2 to form a house foundation. The foundation frame 10 comprises a plurality of support members 12. The support members 12 are formed by threaded spindles or screws 12 arranged in oorresponding threaded holes 14 in the foundation frame 10. See fig. 2. The support members 12 support the foundation frame 10 on the ground in the excavation 2. The bottom surface of the excavation 2 is difficult or impossible to get completely plane. Due to the threaded support members 12 in the threaded holes 14 are the support points of the foundation frame 10 adjustable in height. The support members 10 are located at least at, or adjacent to, the corners of the foundation frame 10. ln the illustrated embodiment are support 10 15 20 25 30 members 12 further located at a midpoint of sides of the foundation frame 10. The position of these support members 12 provides that different parts of the foundation frame 10 may be height-adjusted to provide a leveled upper side of the foundation frame 10. A pluraiity of support members 12 are grouped together at location along the foundation frame 10.

To provide stabiiity of the foundation frame 10 and the support members 12 are all support members 12 placed on a support plate 18 on the excavation bottom. ln the illustrated embodiment is the foundation frame 10 formed by a pluraiity of frame modules 10a-10f. The frame modules 10a-10f are in the corners of the frame 10 connected by corner modules 11. At the ends of the frame modules 10a-f are coupling members 16 arranged. Each coupling member 16 is configured for coupling to a corresponding coupling member 16 on another frame module.

The foundation frame 10 further comprises a shoulder 19 at an inner side of the frame 10. The shoulder 19 is, as seen in fig. 2 and further in fig. 6, provided for support of a ground plate 40 of the house foundation system 1. When the foundation frame 10 has been arranged on the bottom of the excavation 2, and leveled by adjustment of height-adjustable support members 12, the ground plate 40 may be arranged on the shoulder 19 of the foundation frame 10 and thereby be plane. The ground plate 40 may thereby be prefabricated given the size of the foundation frame 10, and still provide a leveled surface of the house foundation system 1.

The foundation frame 10 is preferably made of foam glass to provide a frame that has an insulating function.

Figs. 4-6 further illustrate the house foundation system 1, and also the method of forming a house foundation system according to an embodiment of the invention.

The foundation frame 10 is arranged in an excavation 2, standing on the support members 12. The support members 12 are further placed on support plates 18 on the ground in the excavation 2.

As seen in fig. 5 is the excavation filled with an insulating and draining granulate material 30. The granulate material 30 is in one embodiment made of foam glass. ln another embodiment is the granulate material 30 lightweight-expanded aggregate, pumice or the like. The granulate material 30 is packed in the excavation.

The granulate material 30 is provided, and packed, both inside the foundation frame 10 and outside the foundation frame 10, within the excavation 2. When packed in the excavation 2 will the granulate material 30 provide good insulation function as well as 10 15 20 25 30 a draining function of the foundation. The granulate material 30 is filled up to a level below the level of the shoulder 19 of the foundation frame 10. ln one embodiment is the granulate material filled up to a level 30-80 mm below the shoulder 19 of the foundation frame 10, preferably about 50 mm below the shoulder 19. On top of the packed granulate material 30 may a fiber cloth layer be arranged.

Next, as seen in fig. 6, is the ground plate 40 arranged on the shoulder 19 of the foundation frame 10. A space 5 is thereby formed between the granulate material 30 and the ground plate 40. The ground plate 40 is made of light ballast concrete comprising ballast in form of foam glass, lightweight-expanded aggregate, pumice or the like. The ground plate 40 may in another embodiment be made of light concrete or foam concrete. The ground plate 40 may further, instead of being prefabricated and put in place on the foundation frame 10, be casted directly in place on the foundation frame 10 and the granulate material 30.

The final step of forming the house foundation 1 is to provide a support casting for fixating the foundation frame 10 and the ground plate 40. The support casting is performed to fix the ground plate 40 to the foundation frame 10. The support casting is provided in a space 4 between the ground plate 40 and the foundation frame 10.

The support casting then extends downwards through the coupling between frame modules 10a-f. The coupling members 16 are thereby fixed to the frame modules at each coupling. The support casting further fixates the foundation frame 10 towards the excavation bottom by filling a space 3 below the foundation frame 10 at which the support members 12 support the frame 10. Further, the support casting may fill the space 5 between the granulate material 30 and the ground plate 40, thereby further fixating the ground plate 40 to the foundation frame 10 and the granulate material 30.

As illustrated in figs. 1-6, the house foundation system 1 comprises a channel system 20 arranged at the bottom of the excavation 2. The channel system 20 is connected to a dehydrator arrangement 22 in order to provide an underpressure in the channel system 20. By providing an underpressure in the channel system 20 may an extraction of humidity from the foundation be performed, especially from the granulate material 30. Hence, the method of forming a house foundation may comprise a step of providing an underpressure in a channel system 20 in the foundation 1 to extract humiditytherefrom.

Fig. 7 illustrates a flow chart of a method of forming a house foundation according to an embodiment of the invention. The method 100 comprises a step 110 10 15 20 25 30 of arranging a foundation frame 10 on the bottom of an excavation 2. The foundation frame 10 comprises, in one embodiment, height-adjustable support members 12 that enables the foundation frame 10 to be height-adjusted to be Ieveled. The method may then further comprise a step of adjusting the support members to provide a Ieveled foundation frame 10. The method 100 further comprises a step 120 of filling the excavation 2 with an insulating and draining granulate material 30. The granulate material 30 may for instance be foam glass. The granulate material 30 is provided both inside and outside the foundation frame 10 in the excavation 2. The step 120 may further comprise a step of packing the granulate material 30. Further, the method 100 comprises a step 130 of providing a ground plate 40 on the foundation frame 10. The ground plate 40 can be prefabricated to shorten the time of the forming of the house foundation 1. Finally, the method comprises an optional step 140 of providing a support casting for fixating the ground plate 40 to the foundation frame 10. The support casting further fixates the foundation frame 10 on the bottom of the excavation 2.

The described and illustrated embodiments comprise one foundation frame 10 in one piece or modules for receiving one ground plate 40 thereon. The house foundation system may as well comprise further sections or modules of the foundation frame to form a plurality of frames arranged next to each other or interconnected by sharing frame modules. Foundation frame configurations having various forms may thereby be formed, and thereby also being configured for receiving two or more ground plates thereon. For instance, a foundation frame may comprise a rectangular shaped outer frame section being divided into two portions by an intermediate frame module. The intermediate frame module may thereby be shared by the two portions. The intermediate frame module may further be configured to support two ground plates, one for each portion of the foundation frame, by having two opposite shoulders. ln the drawings and specification, there have been disclosed preferred embodiments and examples of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for the purpose of limitation, the scope of the invention being set forth in the following claims.

Claims

10 15 20 25 30 CLAIMS

1. House foundation system (1) comprising a foundation frame (10) for arrangement on an excavation bottom, characterized in that the foundation frame comprises a plurality of height-adjustable support members (12), adjustable to provide a ieveled foundation frame on an uneven excavation bottom.

2. House foundation system according to claim 1, wherein the foundation frame (10) is rectangular, and which comprises at least four height-adjustable support members, each associated with a corner of the foundation frame.

3. House foundation system according to claim 1 or 2, wherein each height- adjustable support member (12) comprises a threaded spindle arranged in a corresponding threaded hole (14) in the foundation frame (10).

4. House foundation system according to any of the preceding claims, wherein the foundation frame (10) is made of light ballast concrete.

5. House foundation system according to any of the preceding claims, wherein the system (1) further comprises an insulating and draining granulate material (30).

6. House foundation system according to any of the preceding claims, wherein the foundation frame (10) is formed by frame modules (10a-f, 11).

7. Method (100) of forming a house foundation, comprising the steps of: arranging (110) a foundation frame (10) on an excavation bottom, filling (120) the excavation (2) with an insulating and draining granulate material (30), and providing (130) a ground plate (40) supported by said foundation frame. 10 15 10

8. Method according to claim 7, wherein the granulate material (30) is foam glass, lightweight-expanded aggregate, pumice or the like.

9. Method according to any of the claims 7-8, wherein the method (100) further comprises a step of providing a channel system (20) below the granulate material (30) for drying of the house foundation using underpressure.

10. Method according to any of the claims 7-9, wherein the method further comprises a step (140) of providing a support casting of the foundation frame (10) and/or the ground plate (40).

11. Method according to any of the claims 7-10, wherein the foundation frame (10) comprises a plurality of height-adjustable support members (12), adjustable to provide a leveled foundation frame on an uneven excavation bottom, and wherein the method further comprises a step of adjusting the support members to provide a leveled foundation frame arranged on the excavation bottom.