Heat insulated foundation

FIELD: construction.

SUBSTANCE: invention is related to construction, namely to erection of buildings and structures on freezing heaving soils. Foundation on freezing soil includes rigid body comprising foot and wall, with gasket from the side of foot inverted to soil and made of heat insulation material, for instance from foam polystyrene, and also additional heat insulation material installed outside foundation limits. Upper edge of additional heat insulation material is pulled from the side of foundation external edge in the form of broken inserts via rigid body of foundation and is connected to additional heat insulator of opposite external edge of foundation. Pressure on soil in foundation foot is accepted as not higher than value of design resistance of heat insulation material to compression, and relative area of broken inserts (β=Abr ins/A0) is defined from ratio β≤1-σmax/R, where Abr.ins is area of broken inserts section, m2, A0 is gross area of foundation section in place of inserts installation, m2, σmax is maximum tension in foundation material from external loads, MPa, R is design resistance of foundation material, MPa. Additional heat insulation material installed on external side of foundation foot is connected to heat insulation material of foundation external wall. Additional heat insulation material installed on internal side of foundation foot is connected to heat insulation material of foundation internal wall. Inserts of additional heat insulation material of foundation are connected to ceiling heat insulation material above foundation. Heat insulation material installed from external side of foundation wall is connected to heat insulation material of blind area. Heat insulation material installed on internal side of foundation wall is connected to heat insulation material of ceiling above foundation.

EFFECT: provision of possibility to install foundation above design depth of heaving soil freezing, increased level of soil protection under foundation against freezing.

2 dwg

 

The invention relates to the field of construction and is used in the construction of buildings and structures on freezing swelling soils.

Known foundations on frozen soil (Foundation-equivalent), including rigid body consisting of a bottom and walls, laying side soles facing the ground, made of insulating material, for example of polystyrene, as well as additional insulation placed outside the Foundation, and the ground pressure on the sole Foundation is taken not more than a value calculated resistance of the material of insulating material in compression (patent RU №2135693, MKI6E02D 27/01, 27/35 "Insulated Foundation" [1], claim 2).

Lack of Foundation-analogue is low insulating ability to protect soil from freezing.

Closest to the claimed object, the technical solution is the Foundation on frozen soil (Foundation-prototype), comprising a rigid body consisting of a bottom and walls, laying side soles facing the ground, made of insulating material, for example of polystyrene, as well as additional insulation placed outside the Foundation, with the upper edge of the additional insulation is omitted from the outer edge of the fu is dementa in the form of intermittent liners through the rigid body of the base and connected to the additional insulation the opposite outer edge of the Foundation, the ground pressure on the sole Foundation is taken not more than a value calculated resistance of the material of insulating material in compression, and the relative area of intermittent liners

(β=Andprvc/A0) is taken from the relation

β≤1-σmax/R

where aprvc- the cross-sectional area intermittent liners, m2;

And0- the cross-sectional area of the basement gross in the place of installation, liners, m2;

σmax- the maximum stress in the material of the base from external loads, MPa;

R is the calculated resistance of the material of the Foundation, MPa

(Patent RU №2237780, MKI6E02D 27/01, 27/35 "Insulated Foundation" [2], claim 2).

The lack of Foundation of the prototype is insufficient thermal insulation capacity for the protection of soil from freezing.

The purpose of the claimed invention is to provide a more effective protection heaving soils from freezing, in particular due to more rational allocation of additional insulation in the body of the Foundation and beyond.

This objective is achieved in that in the base, comprising a rigid body consisting of a bottom and walls, laying side soles facing the ground, made of insulating material, for example of polystyrene, and will complement the AUX heater, placed outside the Foundation, with the upper edge of the additional insulation is omitted from the outer edge of the Foundation in the form of intermittent liners through the rigid body of the base and connected to the additional insulation the opposite outer edge of the Foundation, the ground pressure on the sole Foundation is taken not more than a value calculated resistance of insulating material to compression, and the relative area of intermittent liners (β=Andprvc/A0) ratio

β≤1-σmax/R

where aprvc- the cross-sectional area intermittent liners, m2;

And0- the cross-sectional area of the basement gross in the place of installation, liners, m2;

σmax- the maximum stress in the material of the base from external loads, MPa;

R is the calculated resistance of the material of the base, MPa,

characterized in that the proposed insulated Foundation additional insulation installed on the outside of the soles of the basement, connected to the insulation of the outer wall of the basement.

In addition, we offer insulated Foundation:

- additional insulation installed on the inside of the soles of the Foundation connected with insulation internal wall of the basement;

- a heater mounted on the outer side of the wall to Fundam the NTA, connected to the heater blind area;

in - ear extra insulation Foundation connected with insulation overlap above the base;

- insulation installed on the inside walls of the basement, connected to the insulation boards over the Foundation.

The thickness of the insulation is under the sole Foundation insulation exterior and interior walls, insulation of the blind area and overlap above the Foundation, and the size of the intermittent inserts additional insulation is installed by thermotechnical calculation of conditions reduce the heat flow from the soil Q.

In the proposed insulated Foundation saved the requirements of the Foundation: ground pressure pcfdoes not exceed the calculated resistance of the insulation material under the sole Foundation RSGand sediment Foundation Scpcalculated taking into account the increased compressibility of the insulation value of the normalized maximum allowable precipitation Sand. In addition, choice of sizes intermittent ear in the wall Foundation can provide the required strength of the material of the base.

The stability of the Foundation under the action of normal and tangential forces of frost heave in freezing soils is provided by the laying of insulation under the sole Foundation on outer and inner surfaces of the walls, under utmost the th, coupling inserts additional insulation of Foundation walls with insulation boards over the Foundation than decreases and in the limit of completely eliminates the frozen ground under the sole Foundation.

A set of proposals provides an implementation goal of providing more effective than the Foundation of the prototype protection heaving soils from freezing by assigning the required thickness of insulation under the sole Foundation, connection of additional insulation with insulation exterior and interior Foundation walls, extra insulation from the side adjacent to the ground, under paving Foundation and connections, inserts additional insulation of the inner edge of the Foundation with insulation boards over the Foundation.

When analyzing the level of technology is not revealed similar, characterized by signs, identical to all the essential features of the proposed solution, i.e. it meets the requirements of novelty.

Not detected signs that are distinctive in the inventive solution, i.e., it meets the requirement of inventive step.

The invention is illustrated by drawings: figure 1 shows insulated strip Foundation, loaded linear load n and sunk into the soil to a depth d; figure 2 - the priest is acnee section 1-1 of the Foundation.

Strip Foundation (1, 2) comprises a sole 1 and the wall 2 made of rigid material (reinforced concrete). From the soles of the Foundation 1, facing to the ground, placed the gasket 3 made of extruded polystyrene foam, and inner and outer surfaces of the sole 1 and the wall 2 - additional heater (respectively pos.4 and 5). The wall 2 of the Foundation has the outer 6 and inner 7 additional insulation. In the upper part of the wall 2 of the Foundation an additional heater 8 in the form of intermittent ear.

On the Foundation wall 2 is based wall above-ground structure 9 with the outer and inner insulation. The composition of the heat-insulated Foundation is also blind area 10 with insulation 11 on its lower surface, sand preparation 12 under the insulation layer 3 and backfilling 13. The wall 9 is based floor slab 14 with a heater 15 on its lower part. Position 16 shows the boundary of soil freezing df.

For example, illustrating the invention, taken with the following initial data:

- the load on 1 m length (I=1.0 m) of the sole 1 Foundation:

n=250 kN/m;

- the width of the sole 1 Foundation 1:b=2.0 m;

- size of the sole 1 Foundation 1:

A=Ib=1.0-2.0=2.0 m2/m;

- gross area of the wall 2 of the base section where you installed intermittent liners 8: A0=I b0=1.0·0.5=0.5 m2/m;

p> - dimensions intermittent liners 8: length along the wall 2 Foundation: c1=0.5 m; the distance between the broken ear 8 on the length of the wall 2: c2=0.5 m (see figure 1); the width equal to the width of the upper part of the wall 2 of the Foundation: b0=0.5 m, height hprvc=0.1 m (see figure 1);

- the average pressure on the sole 1 of the basement and on the surface of the strip 3: pcf=n/A=125 kPa = 0.125 MPa;

the depth of the sole 1 basement: d=0.60 m;

- the thickness of the strip 3: δ=0.05 m; modulus

EEP=1.0 MPa; the estimated resistance of extruded polystyrene foam: RSG=0.150 MPa;

- estimated depth of soil freezing: df=1.9 m;

- design ground resistance: Rg=0.220 MPa;

- current resistance of the concrete wall 2 Foundation:

Rb=5.2 MPa;

- sediment sole 1 Foundation without taking into account the compressibility of the gasket 3: S0=0.035 m

From the calculations it follows that the greatest pressure on the ground on the sole 1 Foundation - psun=0.125 MPa does not exceed the calculated ground resistance Rg=0.220 kPa and conditions:

- strength strip 3 made of extruded polystyrene:

- full settling of the Foundation 1, taking into account the compressibility of the gasket 3 made of extruded polystyrene:

- device capability interrupted the x liners 8:

where β=Andprvc./A0=0.25/0.50=0.50;

Andprvc.=c1b0=0.5·0.5=0.25 m2- the cross-sectional area intermittent liners 8;

A0=(c1+c2)b0=(0.5+0.5)0.5=0.50 m2- the cross-sectional area of the wall 2 of the Foundation of the gross in the setup intermittent liners 8;

σmax=n(c1+c2)/(c2b0)=250(0.5+0.5)/(0.5·0.5)=1000 kPa=1.0 MPa maximum stress in the material of the wall 2 of the base from external loads;

R=Rb=5.2 MPa - current resistance of the concrete wall 2 of the base.

Thus, the requirements imposed on the design of foundations in the above example are satisfied.

From thermal analysis performed on the program "NEAT-PTF3" (three-dimensional), it follows that the effectiveness of thermal insulation in comparison with the Foundation of the prototype increases significantly when connecting additional insulation with insulation exterior and interior Foundation walls, placing insulation under the blind area of the basement, and when connecting inserts additional insulation of the inner edge of the Foundation with insulation boards over the Foundation.

Multiplicity of solutions insulation Foundation helps to minimize heat flow from the soil and significantly reduce the depth of soil freezing df16 in the evil of the sole 2 of the Foundation. For example, the thickness of the most expensive heater 3 made of extruded polystyrene foam under the sole 1 of the Foundation can be reduced to a minimum, and in the limit is reduced to zero.

Thus, the advantages of the proposed solution heat-insulated Foundation on freezing heaving soils compared to the Foundation of the prototype are to ensure more effective protection of the heaving of the soil from freezing, reducing material consumption foundations.

List of used materials

1. Patent RU No. 2135693, MKI6E02D 27/01, 27/35. Insulated Foundation. / WTO and Yergenonsky. - Publ. 27.08.1999, bull. No. 24. - 12 S.

2. Patent RU No. 2135693, MKI6E02D 27/01, 27/35. Insulated Foundation. / WTO, Yergenonsky and Vol. - Publ. 27.01.2004, EN BIPM No. 3. - 8 S.

The foundations on frozen ground, comprising a rigid body consisting of a bottom and walls, laying side soles facing the ground, made of insulating material, for example of polystyrene, as well as additional insulation placed outside the Foundation, with the upper edge of the additional insulation is omitted from the outer edge of the Foundation in the form of intermittent liners through the rigid body of the base and connected to the additional insulation the opposite outer edge of the fu is damanta, the ground pressure on the sole Foundation is taken not more than a value calculated resistance of insulating material to compression, and the relative area of intermittent liners (β=Andprvc./A0) is defined from the relation
β≤1-σmax/R
where aprvc.- the cross-sectional area intermittent liners, m2;
And0- the cross-sectional area of the basement gross in the place of installation, liners, m2;
σmax- the maximum stress in the material of the base from external loads, MPa;
R is the calculated resistance of the material of the base, MPa,
characterized in that the additional insulation installed on the outside of the sole Foundation connected with insulation outer Foundation walls, extra insulation installed on the inside of the soles of the Foundation connected with insulation internal wall of the basement, with inserts additional insulation of the Foundation connected with insulation boards over the Foundation, and the insulation is installed from the outside Foundation walls, connected to the heater blind area, the insulation installed on the inside walls of the basement, connected to the insulation boards over the Foundation.



 

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Basement // 2334054

FIELD: building.

SUBSTANCE: invention refers to building and concerns creation of the basements - mesh envelopments for buildings and constructions. The basement contains the artificial basement with a curvilinear surface, supporters and envelopment located on the basement. Supporters are executed in the form of radial and ring tapes forming the mesh envelopment, laid and gummed on the concrete surface formed on a curvilinear surface of the artificial basement located in foundation ditch and turned bulge upwards. Radial tapes are attached by edges to a basic contour in the form of system of cross girders, which is sunk in the natural base.

EFFECT: provision of effective and reliable protection of the over-basement design, decrease of materials consumption.

1 dwg

Basement // 2334053

FIELD: building.

SUBSTANCE: invention refers to building and concerns creation of the basements of radial envelopments for buildings and constructions. The basement contains the basement with a curvilinear surface, supporters and envelopment located on the basement. Supporters are executed in the form of radial tapes forming envelopment, laid on a curvilinear surface and turned by bulge upwards the artificial basement located in a foundation ditch or the natural basement. Radial tapes are attached by edges to a basic contour in the form of a basic ring which is established on the natural basement.

EFFECT: provision of effective and reliable protection of the over-basement design, decrease of materials consumption.

1 dwg

Basement // 2334052

FIELD: building.

SUBSTANCE: invention refers to building and concerns creation of basements - mesh envelopments for buildings and constructions. The basement contains the artificial basement with a curvilinear surface, supporters and envelopment located on the basement. Supporters are executed in the form of radial and ring tapes forming the mesh envelopment, laid and gummed on the concrete surface formed on a curvilinear surface of the artificial basement located in foundation ditch and turned bulge upwards. Radial tapes are attached by edges to a basic contour in the form of a basic ring which is established on the natural base.

EFFECT: maintenance of effective and reliable protection of the over-basement design, decrease of materials consumption

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Basement // 2334051

FIELD: building.

SUBSTANCE: invention refers to building and concerns creation of basements - mesh envelopments for buildings and constructions. The basement contains the artificial basement with a curvilinear surface, supporters and envelopment located on the basement. Supporters are executed in the form of radial and ring tapes forming the mesh envelopment, laid and gummed on the concrete surface formed on a curvilinear surface of the artificial basement located in foundation ditch and turned bulge upwards. Radial tapes are attached by edges to a basic contour in the form of a basic ring which is established on the natural basement.

EFFECT: maintenance of effective and reliable protection of the over-basement design, decrease of materials consumption.

1 dwg

Basement structure // 2334050

FIELD: building.

SUBSTANCE: invention refers to construction of the basements of buildings. The basement structure of a building includes heat - and waterproofing layer (17, 18, 40) which is laid on a flat horizontal surface (51) layer of the material breaking capillary action. The basement structure includes a frame (31) which surrounds specified heat - and waterproofing layer (17, 18, 40), at least, in its top part, thus fixing integrity of basement structure in a horizontal plane and which serves for punctiform bracing of the building supported by basement structure. The specified basement structure is encapsulated with foil (111) from a metal material.

EFFECT: prevention of smell penetration in a building and water-proofing maintenance; possibility of fast and energy conserving erection of the basement.

8 cl, 8 dwg

FIELD: constructional engineering.

SUBSTANCE: invention refers to constructions on heaving soils. House footing based on freezing through soils includes a rigid body with flanges and indents from soil side, footing indent inserts made of heat-insulating material, e.g. polystyrene foam at such ratio of flange and footing indent areas that soil pressure from the lower flange surface is not less than standard pressure of frost soil heaving, soil pressure from the lower insert surface is not exceeding design compression resistance of insert material. Also, the said footing contains supplementary heat insulation laid outside of the footing. The upper edge of supplementary heat insulation is passed from external edge of the footing in the form of interrupted inserts through rigid body of the footing and connected to supplementary heat insulation of opposite external edge of the footing. Relative area of interrupted inserts (β=Aint.ins./A0) is given by the relation β≤1-σmax/R, where Aint.ins. is sectional area of interrupted inserts, m2, A0 is gross sectional area of the footing within inserts arrangement regions, m2, σmax is maximum external load pressure in footing material, MPa, R is design resistance of footing material, MPa. Indents and flanges of the footing from soil side are alternating along footing length. Indents centres from soil sides are provided under interrupted inserts centres of supplementary heat insulation from each external edge of the footing.

EFFECT: possibility to lay foundation above the design depth of heaving soil frost penetration level.

4 dwg, 1 tbl

FIELD: construction, surface mounted structures.

SUBSTANCE: invention pertains to construction and can be used when erecting buildings with considerable loading on a compressed clay bed. The technique for erecting a solid core foundation slab with closed vertical walls, directed downwards, involves designing a foundation pit, trenches, reinforcing them with frames and filling with concrete, and joining the surface with a slab. The trenches are dug from the bottom of the foundation with different depths. The trenches are then joined, thereby forming several closed contours, whose depth increases from the central part of the slab to the edges. The technical outcome is increase in strength of the foundation slab due to effect of the square shaped closed edges in the ground.

EFFECT: increased strength of the foundation slab.

3 dwg

FIELD: construction, particularly to reconstruct buildings and building structures.

SUBSTANCE: foundation comprises supports, sheath freely formed in ground inside area defined by foundation so that convexity thereof faces upwards and connected to supports by means of flexible ties. Cement mix layer, metal arch trusses and reinforced concrete layer are serially arranged on ground inside area defined by foundation. Metal sheets are laid on arch trusses and connected with each other through welded joints to create flexible sheath. Pre-stressed flexible ties inserted in through support orifices and provided with fixing anchors are placed over the sheath. In the second embodiment foundation comprises support, sheath freely arranged in ground inside area defined by foundation so that convexity thereof faces upwards and connected to supports by means of flexible ties. Ground mix layer reinforced with cement mix, metal sheets and reinforced concrete layer are serially located on ground inside area defined by foundation. Metal sheets are bent along predetermined profile and connected with each other to create sheath. Relaxed flexible ties inserted in through support orifices and provided with fixing anchors are placed over the sheath.

EFFECT: increased operational reliability.

4 cl, 1 dwg, 1 ex

FIELD: construction, particularly new building erection and existent building reconstruction under any engineering-geological circumstances.

SUBSTANCE: foundation structure comprises shallow foundation and reinforcement members. Reinforcement members are made as vertical bars of precast or cast-in-place piles having diameters less than 200 mm and arranged along foundation perimeter. The piles are spaced a distance from outer foundation faces. The distance is equal to 0.1-0.5 of reinforcement member diameter. Distance between neighboring piles is equal to 2-4 reinforcement member diameters and reinforcement member length is 15-20 diameters thereof.

EFFECT: increased load-bearing capacity due to creating compressive operational conditions under different engineering-geological circumstances, increased dynamic rigidity of foundation base and reduced foundation deformation and vibrational amplitude.

9 dwg

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