SUBSTANCE: invention relates to the construction of shallow foundations. Slab foundation, reinforced with recessed cage located outside the foundation along its perimeter at some distance from the edge of the plate. Deepening of the bottom of the cage exceeds the depth of maximum horizontal ground motions. The distance between the cage and the edge of the slab is set according to the planned design bearing capacity or settlement of the foundation and in the composite cage made of reinforced components their upper parts are connected by a belt.
EFFECT: technical result is the increase of the reliability and load-bearing capacity of the slab foundation, reduction of its settlement, reduction of material consumption.
8 cl, 9 dwg
The invention relates to the construction of shallow foundations.
A known method of strengthening of slab foundations, pile fields from a large number of piles below the foundations [SP 50-102-2003, M., 2004, S. 30-31].
However, you can significantly reduce the number of piles, if you install them in small increments in the form of a yoke not under the slab, and only with its outer side, along the external perimeter of the base. This is enough to limit the lifting of the soil from beneath the edges of the Foundation to increase due to this, the bearing capacity and reduce settlement Foundation (prototype No. 1) [RU 2256033 C2, 04.08.2003].
The disadvantages of the prototype
- The presence of large gaps between the piles in soft soils allow free horizontal lifting of the ground through the gaps. This weakens the effectiveness of the strengthening of the Foundation.
- The upper ends of the piles are free. Under the influence of horizontal movement of the soil piles will be pressed into the surrounding ground, the distance between adjacent piles will increase, thereby reducing the resistance to horizontal wyboru soil.
- The length, the diameter of the piles and their distance from the edge of the Foundation depends on many parameters. The specific values given in the prototype, are only a particular case described in the description of the invention. For mn the other other soil conditions and dimensions of the Foundation they simply unacceptable. In the prototype No. 2 [RU 2472899 C1, E03D 27/08, 30.01.2013] provided some evidence aimed at addressing these shortcomings. However, they were not devoid of shortcomings.
In particular, the laying loose beams on top of the pile, not clearly formulated, has an auxiliary decorative in nature and is not intended to increase the bearing capacity of the Foundation.
- Length of pile shell from the edge of the Foundation is aimed only at ensuring the free vertical movement of the Foundation and does not solve the problem of increasing the bearing capacity of the Foundation.
- The length of the pile shell in the ground is not unequivocally defined and therefore can theoretically be taken infinitely long.
The aim of the invention is to improve the reliability and load bearing capacity slab Foundation, the reduction sediment reduction of material consumption for the production and efficiency of operations.
The aim is achieved in that the depth of the bottom of the cage is greater than the depth of the maximum horizontal displacements of the soil, the distance clips the edge of the Board appointed depending on the planned design bearing capacity or settling of the Foundation, and in a compound clip from emoluments their upper parts are connected by the belt.
The objective is also achieved by the fact that the clip is made of emoluments as spun the new piles.
The objective is also achieved by the fact that the clip is made of emoluments two side plates along the length, rigidly attached to opposite sides of emolument and allow to fully close the gaps between the trunks of the neighboring emoluments due to partial overlap of the side plates.
The objective is also achieved by the fact that the clip is made of emoluments in the form of racks with two side plates along the length, rigidly attached to opposite sides of the racks and allow to partially overlap the gaps between the neighboring racks of emoluments.
The objective is also achieved by the fact that the clip is made is rigidly attached to the transverse support element resting on the subgrade.
The objective is also achieved by the fact that the transverse supporting element, based on the ground surface.
The objective is also achieved by the fact that the transverse supporting element, based on the soil at or below the base of the layer of seasonal freezing and thawing of the soil.
Comparative analysis of the prototype shows that the inventive method is distinguished by the totality of the stated characteristics. This allows to make a conclusion on compliance with the sign of "novelty."
The comparison not only with the prototype, but also with other technical solutions in this field of technology is not allowed to reveal in them the features that distinguish allow aemy way from the prototype, that allows to conclude that the criterion of "substantial differences".
In Fig. 1 cutaway raft Foundation on soil Foundation, strengthened the case installed on the perimeter of the base; Fig. 2 shows a plan of the specified slab Foundation, reinforced yoke; Fig. 3 shows a top view of a holder made of sheet piles; Fig. 4 shows a top view of a holder made of separate piles with side plates without gap; Fig. 5 - the same option with gaps between the plates; Fig. 6 shows a clip from a separate emoluments increments, depending on the planned design bearing capacity or design Foundation settlement; Fig. 7 shows a clip from a separate emoluments connected in the upper part of the power belt; Fig. 8 shows the holder with a cross support element resting on a ground surface; Fig. 9 shows a housing with a transverse support element resting on the ground below the base of the layer of seasonal freezing and thawing of the soil.
When loading base plate 1 is compressed to substrate 3 and the displacement of the soil in the lateral direction. This displacement of the soil reduces the bearing capacity of the Foundation under the stove. To strengthen the base 3 serves to hold the guide holder 2 located outside of the Foundation 1 isoperimetry (Fig. 1). It prevents lateral displacement of soil from under the base plate 1, contributes to a more uniform and intense soil compaction, and hence increase its load carrying capacity. The depth of the lower end of the holder 2, in contrast to the prototype, must exceed a depth of 8 at the level of maximum horizontal displacements of the soil δmax. Otherwise, the majority of the ground will be squeezed out from under the bottom of the holder 2 and this will greatly reduce the efficiency of the installation. The most effective is the depth of the cage up to level 9, where the horizontal movement of soil significantly reduced. In this case, is used to the full compression of the soil inside the casing, therefore, increases the maximum bearing capacity of the plate and decreases its sediment.
Between the edge of the plate 1 and the shell 2 arrange the clearance value "a" (Fig. 1). This increases the bearing capacity of the slab, because it increases the diameter of the working part of the soil Foundation with "d" to "D". At the minimum gap is a strong compaction of the soil in a confined space, it can lead to the destruction clip from the effects of tensile stresses. If the clearance is too large ground before reaching the cage, will be squeezed out from under the plate on the surface of the ground inside the cage, i.e., the positive effect is not bodø is obtained. For these reasons, to increase the bearing capacity of the Foundation inside the clip distance "a", you must first assign a special way (according to the calculation or experiments).
Describes the nature of the influence of the gap "a" the bearing capacity of the surface of the Foundation is confirmed, in particular, the model tests the surface of the Foundation of a small diameter, installed in a steel shell. The test results presented in thesis. Murzenko Y. N. [Experimental-theoretical study of force interaction of foundations and sandy grounds. dis.... Dr technology. Sciences. - Novocherkassk. 1972. S. 358]. The tests showed that the bearing capacity of the model Foundation in a steel cage on a sand base significantly depends on the ratio D/d, i.e., the size of the gap "and". The nature of this relationship described above. The optimum value of the ratio D/d=1,3. Whenand=0,5(D-d) and d=40 cm, it follows that the recommended gap for these particular parameters, the sizes of the base and the shell 0.15 d. Maximum load capacity when the ratio D/d is equal to 46.7 mc. For other values of D/d bearing capacity F was:
That is, the bearing capacity of the Foundation depends on the size of the gap.
The clip may be a composite of the individual emoluments. In Fig. 3 shows the clip of sheet piles 4 are securely interconnected. This design is capable of tensile stress in the horizontal (circular direction) and therefore most effectively resists the horizontal pressure of the extruding soil and it increases the bearing capacity of the Foundation.
In Fig. 4 shows a portion of a yoke of the racks 7 with two side plates 6, rigidly welded to the rack. They completely cover the gap between the posts, so they provide almost full use of compression of the soil inside the cage. To improve the reliability overlap a gap between the reinforcing elements in the process of their movement and deformation during the loading of the Foundation, side plates need to install a small overlap (up to 10 mm).
In order to save material, the ferrule may be zgodovina of a single reinforcing elements, shipped a short distance "b" or "d" from each other (Fig. 5 and Fig. 6). In this case, the soil in this small gap is involved in the operation of the elements and forms a combined pile-soil cover. The distance between the reinforcing elements must be assigned individually by the results of the preliminary calculation or experimental studies. This distance must provide the required design load bearing capacity of the slab Foundation.
Emolument, primarily designed to resist horizontal load when Wymore soil. For this reason they can be run in the form of racks, freely lowered into the drilled hole with a small space without filling the wells. Small gaps (2-3 mm) between emoluments and the borehole wall will be eliminated immediately after the start of horizontal ground motions and will not have a material impact on the carrying capacity of the Foundation.
For the perception of the annular tensile stresses in the shroud upper ends of the reinforcing elements 4 are connected to each other connecting element - power zone 5 (Fig. 5-7).
With a small depth of the Foundation of the ferrule may be made of steel pipe (ring case) or reinforced concrete, placed in a vertical trench arranged gap making machine or excavator.
Gruntbots holder 2, under the influence of a pressing load from the base plate, will be compacted. Due to this, the frictional force between the reinforced soil and the inner walls of the casing will be larger than with its outer side. This can lead to the displacement of the shroud down over the ground with the outer side of the bracket. This move will stop the process of further compaction of soil within the casing, and hence further increase the bearing capacity of the Foundation. This can be prevented. In Fig. 8 shows a new, compared to prototype, design solution: perpendicular or oblique to the shell 2 along its perimeter rigidly attached to the transverse support element 10 resting on the ground surface. This element provides an additional resistance to immersion shell 2, further compaction inside the cage.
Effect of free movement of soil inside the casing, and therefore, additional sealing can be achieved by reducing the friction force between the ground and the inner wall of the shroud. For example, lubricate it with grease. The outer surface of the shroud should be roughened.
If the soil layer of seasonal freezing and thawing of the ground is heaving, the bearing element 10, based on the soil below the soles layer 7 seasonal freezing-Ottawa the Oia soil (Fig. 9).
1. Raft Foundation, reinforced recessed clip, located outside of the Foundation along the perimeter at a distance from the edge of the plate, characterized in that the depth of the bottom of the cage is greater than the depth of the maximum horizontal displacements of the soil, the distance clips the edge of the Board appointed depending on the planned design bearing capacity or settling of the Foundation, and in a compound clip from emoluments their upper parts are connected by the belt.
2. Raft Foundation under item 1, characterized in that the ferrule is made of emoluments in the form of sheet piles.
3. Raft Foundation under item 1, characterized in that the ferrule is made of emoluments two side plates along the length, rigidly attached to opposite sides of emolument and allow to fully close the gaps between the trunks of the neighboring emoluments due to partial overlap of the side plates.
4. Raft Foundation under item 1, characterized in that the ferrule is made of emoluments in the form of racks with two side plates along the length, rigidly attached to opposite sides of the uprights and allowing only partially overlap the gaps between the neighboring racks of emoluments.
5. Raft Foundation under item 1, characterized in that the ferrule is made with rigidly attached to the transverse support element, on Hiroshima on the subgrade.
6. Raft Foundation under item 1 or 7, characterized in that the transverse support element, based on the ground surface.
7. Raft Foundation under item 1 or 5, characterized in that the transverse support element, based on the soil at or below the base of the layer of seasonal freezing and thawing of the soil.
8. Raft Foundation under item 1, characterized in that the friction on the inner surface of the shroud make less than the outer surface.
SUBSTANCE: monolithic system of a base with a resistant composite coating from homopolymer having semi-continuous configuration comprises load-distributing elements for formation of seams. Comprises a base that includes blocks from polystyrene foam and a bearing semi-continuous cement-concrete coating, the formwork for which is formed by blocks from polystyrene foam that are part of the base. Load-distributing elements are made in the form of load-distributing plates. Each of load-distributing plates comprises two anchors with two reinforcement bars for setting the position of the seam shaper and a hinged joint made as capable of counterclockwise rotation under action of a support moment, developed by the load, and clockwise rotation under action of the support moment developed by load-distributing plates.
EFFECT: efficient operation of a base under action of various loads, reduced material intensity and labour intensiveness.
6 cl, 6 dwg
SUBSTANCE: combined frame-raft foundation for low height construction on soft soil includes a girder reinforced concrete foundation under all bearing walls of the building from factory-built slabs joined to each other and combined into a system of cross bands laid onto a levelled base on the hydraulic insulation layer in the form of a film under the entire building, each of the slabs is made with a section of closed shape with an insulant arranged inside, and the space between the slabs of the frame is filled with earth mass and a layer of the insulant on top, forming the bearing structure of the first floor slab. Slabs of the girder reinforced concrete foundation under all bearing walls are made in the form of a shell of trapezoid rigid shape of section of spatial and closed type, formed from upper and lower slabs of the spatial type, connected to each other. The lower slab is arranged as wider than the upper one and is equipped with boards along the length. The upper slab is made with inclined ribs. In the boards and in the lower part of inclined ribs there are slots, where bushing keys are embedded, with the help of which the upper and lower slabs are connected to each other, and in the places of joints the slabs are equipped with reinforcement protrusions for joining with reinforcement of adjacent elements with node embedding.
EFFECT: increased efficiency of a frame raft foundation due to increased rigidity, improved thermal protection properties, reduced material intensity and labour costs in manufacturing, provision of operation reliability.
2 cl, 3 dwg
SUBSTANCE: basement comprises a natural or an artificial base with a curvilinear cylindrical surface, a membrane laid onto the base and a support contour in the form of a system of cross beams. The membrane is laid via gaskets made of two layers of the material sliding relative to each other, onto the curvilinear cylindrical surface of the natural or artificial base arranged in a pit and turned upwards with a convexity. In the transverse direction the membrane is attached by edges to the support contour in the form of a system of cross beams, which is submerged into the natural base.
EFFECT: reduced subsidence of a basement, higher reliability of a structure above the basement, creation of an efficient membrane basement, reduced material intensity.
SUBSTANCE: method for construction of a foundation includes preparation of a pit bottom for a foot, production of its rigid filler and an external shell of truncated cone shape with expansion of the lower part of its wall and formation of a compacted soil core. The foundation is erected from structural and soil construction elements. The bottom of the pit is prepared for the foot of the structural element with a groove in soil with the specified geometric shape, its rigid filler is made in a sectional conical form from fractions of lumpy clay and cement-sand mortar with the foot of the specified geometric shape. Expansion of the lower part of the wall in the external monolithic reinforced concrete shell is carried out with a foot with the specified geometric shape as well. A soil construction element is formed under a foot of a structural element with a rated pushing load from a structure, as a rigidly coupled compacted core in the form of a circular cone.
EFFECT: improved quality, reliability, bearing capacity of a base, performance, provision of foundation interaction with a base.
8 cl, 2 dwg
SUBSTANCE: lock prefabricated strip footing includes a support slab and rows of foundation slabs arranged on it. The support slab has a face inclined and bonder surfaces, the upper rib for a slot fixation into a lock of the above block. Foundation units have vertical and horizontal slots, protruding beyond faces of the bed and outbond surface by 1/3 of the width, at the same time the last row of the strip footing is arranged from a block, having a flat upper horizontal surface for resting of wall materials when erecting above walls.
EFFECT: reduced labour intensiveness of foundation blocks assembly, increased accuracy of foundation blocks installation, reduced deviations from horizontal and vertical planes, higher resistance of foundation blocks to displacement due to application of geometric parameters of a foundation block.
5 cl, 1 ex, 6 dwg
SUBSTANCE: foundation includes boards arranged on a levelling sand preparatory base, having limiters under a foot. Boards have through slots along edges, and limiters are arranged in the form of flat plates, as capable of their insertion into through slots.
EFFECT: increased rated resistance of base soil, increased bearing capacity and reduced subsidence of a structure.
3 cl, 3 dwg
SUBSTANCE: prestressed shallow foundation formed by a foundation slab, a ground base and a support board installed under the foundation slab and under the ground base at the optimal depth. On the foundation slab there are jacks arranged, which are connected with traction rods and with ground anchors, inserted into the support board and stressed with a total force, which is equal to or is slightly higher than the weight of the erected structure. Anchor traction rods are arranged with tubular section to supply mortar during arrangement of a support board.
EFFECT: invention provides for minimisation of ground base deformation and for elimination of bases and foundations of nearly located buildings and structures, reduction of material intensity and labour intensiveness in construction of foundations.
2 cl, 1 dwg
SUBSTANCE: method to erect a foundation on heaving soils includes installation of a foundation slab and heat insulation material onto a levelled base. A sliding layer is laid on the prepared base, and a multi-layer spatial foundation platform, comprising heat insulation material, is erected in a monolithic manner. The lower reinforced concrete slab is formed with vertical reinforcement rods protruding into crossing ribs along the entire height of the platform. Heat insulation material is laid onto the lower reinforced concrete slab with the possibility to arrange a system of crossing ribs. Crossing ribs are formed. An intermediate reinforced concrete slab is formed, the second layer of heat insulation material is set on it. Cross ribs are formed, and the upper reinforced concrete slab is formed, besides, the vertical reinforcement rods are connected to reinforcement of all slab layers.
EFFECT: reduced labour costs, provision of heat insulation material durability against potential damage, higher spatial stiffness of the foundation slab and its distributing capacity, provision of protection against frost swelling.
3 cl, 1 dwg
SUBSTANCE: heat-insulation foundation comprises wall, foot, insulator of wall, additional insulator of foundation connected to insulators of foot and blind area. Lower edge of foundation insulator is below the level of freezing of soil, and external moistureproof gasket is arranged at the edge of blind area insulator. Additional moistureproof gasket is also located under foot, connected to external moistureproof gasket, and fill is provided between foundation insulator and external moistureproof gasket.
EFFECT: improved operational properties of heat insulation foundation, simplified design, saving of energy resources.
3 cl, 2 dwg
SUBSTANCE: foundation comprises artificial bed with curvilinear surface, bearing elements and shell arranged on bed. Bearing elements are arranged in the form of radial and circular tapes for shells with positive Gauss curvature or transverse and longitudinal tapes for shells with zero Gauss curvature, forming meshy shell and laid through gaskets made of two layers of material, which slide relative to each other, onto concrete surface formed on curvilinear surface of artificial bed arranged in pit and inverted upwards with its convexity. Radial or transverse tapes are fixed by their edges to support contour in the form of support ring or a system of cross beams, which is deepened into natural bed, and gasket of elastic material is located between concrete of shell and support contour.
EFFECT: reduced settling of foundation, lower material intensity, provision of efficient and reliable protection of above-foundation structure.
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.
FIELD: building, particularly panel foundations for multistory buildings and structures, which apply non-uniform loads to ground base.
SUBSTANCE: method involves forming crossing slots in ground; reinforcing the slots with frames and concreting the slots. For panel foundation erection in clay ground pit is preliminarily dug in ground. Then crossing slots adapted for reinforcing frames receiving are created in pit ground, wherein the reinforcing frames have projected parts. Areas of reinforcing frames intersection are additionally reinforced along with connecting projected parts and concreting thereof to fill the slots.
EFFECT: increased operational effectiveness and reduced costs.
FIELD: building, particularly to erect bored cast-in-place foundations of increased load-bearing abilities including ones having bottom marks typical to shallow foundations.
SUBSTANCE: stepped foundation comprises bored cast-in-place sections formed with the use of auger. Lower foundation step includes four peripheral cylinders of Dp.l. diameters and heights equal to above diameters. Peripheral cylinder centers are located at apexes of square having side lengths equal to Dp.l.. Square center coincides with center of support. Central support abutting four peripheral cylinders of lower foundation step has four expanded parts with Dc.exp diameters determined as Dc.exp=(1.0-1.2)Dp.l. and cylindrical bore having diameter Dp.up determined as Dp.up=(0.6-0.8)Dp.l.. Foundation bottom is 0.7 m below ground surface. Foundation erection method involves forming drilled pile sections; serially drilling wells having daug.1 diameters as each peripheral cylinder having Dp.l. is forming; creating each peripheral cylinder having height equal to Dp.l. by supplying working material for above cylinder forming; filling remainder well section with ground material, particularly with ground excavated from above object. Auger having diameter, which provides necessary Dp.l. diameter is used. The auger provides usage of technological processes, which provides 1.05-1.1 increase of pile diameter in comparison with auger diameter daug.1 and 1.1-1.2 increase of ground pile diameter in comparison with daug.1 diameter. After four peripheral cylinders of lower foundation step creation well having daug.2 diameter is drilled by means of direct auger rotation and ground excavation to day surface. The well has center coinciding with central support center and depth selected so that the well reach tops pf peripheral lower step cylinders. Then lower expanded part of central support is formed, wherein the expanded part has expansion degree Bc.exp./daug.2 equal to 1.5-2.0. During cylindrical bore drilling the expanded part has expansion degree Dp.up/daug.2 equal to 1.2-1.5.
EFFECT: increased load-bearing capacity per foundation volume unit, extended field of technical means.
3 cl, 4 dwg
FIELD: construction, particularly to erect foundations in natural base.
SUBSTANCE: method involves driving pair of members pivotally connected with each other and provided with single bevels at lower ends thereof in ground; digging-out trench; installing guiding member on trench bottom; forcing plate members in ground up to plate members abutting upon guiding member and closing of beveled upper ends thereof; installing the similar pair of members having lengths exceeding that of the first pair in trench; driving above pair in ground up to upper beveled ends closing; concreting the trench.
EFFECT: increased load-bearing capacity of the foundation due to inclined members embedding and ground compaction under foundation bottom.
FIELD: construction, particularly to erect multistory buildings on non-uniformly compressible clay base.
SUBSTANCE: method involves excavating crossing trenches in ground; filling the trenches with concrete and joining thereof with slab covering the trenches. Trenches are excavated from pit bottom for different depths. Lower trench parts are provided with widened abutment sections having reinforcement bars included therein. The reinforcement bars are used as non-stretched threads. Trenches and slab are reinforced with nettings. Cell centers of the slab are anchored.
EFFECT: increased rigidity of foundation slab due to provision of ribs in ground.
FIELD: construction, particularly to erect foundations on natural bases.
SUBSTANCE: shallow foundation comprises support mats and foundation building blocks. Support mats have through orifices along mat perimeters. Upper parts thereof have extensions shaped as truncated cones and adapted to immerse piles in ground as load increases during structure overbuilding.
EFFECT: increased load-bearing ability.
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, 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.
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
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