Method to erect foundation on heaving soils

FIELD: construction.

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

 

The invention relates to the construction, namely the construction of foundations for heaving soils.

There is a method by which concrete or reinforced concrete element is placed on a pad or filling of narcisista material to reduce movement of the Foundation in the period of soil freezing and thawing (all-Union construction standards VSN 29-85. Projecting slightly foundations of low-rise rural buildings for heaving soils).

The disadvantage of this method is the increased labor costs associated with the use of bedding from narcisista material, which typically use coarse sand or gravel, which when used in winter conditions should be laid without inclusions of ice and snow and carefully sealed.

There is a method of installation of a base plate, taken as a prototype, which is spread and compacted soil with a covering of coarse-grained sand, set in the ground layer of insulation, such as penostirol, on which is mounted a plate thickness of 20 cm (Yakovlev R.N. New methods of construction. Technology "the war". Moscow, Adelant. 2006. p.83, prototype)

The disadvantage of the prototype is the low efficiency of the Foundation for heaving soils due to the fact that the established ground insulation must possess is the substance of great strength, because it is transferred to the load from the plate and buildings, and create uneven deformation due to sediment base. Due to the fact that this construction can prevent blagoveshenie, measures are required to protect the insulation from soaking to ensure its durability. Considering all factors, the work of the Foundation plate must possess great rigidity that is not explicitly provided in its small thickness, and the cost of construction in connection with the specified requirements insulation is quite high due to its high cost.

Object of the invention is the reduction of costs and creating an efficient method of Foundation construction for heaving soils by minimizing earthwork and works to protect the insulation from moisture and possible destruction, ensuring the longevity of the insulation, extend range, increase the rigidity of the base plate, and means effective protection of the soil from frost heaving by the erection of a multilayer base platform sliding layer containing a heater and having a large spatial rigidity, distribution capacity and, consequently, low sensitivity to uneven movements of the soil.

To solve the problem in the method of construction of Foundation for heaving soils, vklyuchayuschego base plate and the insulation on the aligned based, according to the invention onto the prepared substrate is placed a sliding layer and implement a monolithic multilayer construction of the spatial Foundation of the platform that contains the heater, when it is formed into the bottom of a reinforced concrete slab with vertical reinforcement bars in the cross-ribs on the entire height of the platform on the bottom of a reinforced concrete slab placed insulation with the ability to perform cross-ribs formed into the cross-ribs are molded intermediate reinforced concrete slab, install a second layer of insulation is formed into a cross-ribs and perform the formation of the top concrete slab and vertical reinforcement bars connected with the valve all the layers of plates.

According to the invention absorbent insulation cover waterproof tape, and a sliding layer performs at least two layers of polymer film.

The method of construction of Foundation for heaving soils is illustrated by a drawing, which schematically shows the Foundation built by the present method.

The method of construction of Foundation for heaving soils is as follows. Level and compacted soil base. On an aligned basis apply two layers of the polymer film to create a sliding layer 1. On the prepared base with sliding with the OEM 1 erect monolithic multilayer spatial base platform 2, containing the bottom 3, the intermediate 4 and upper 5 concrete slabs, integrally United by cross ribs 6 and fittings. The bottom concrete plate 3 is formed with vertical reinforcement bars 7 in the cross-ribs 6 on the entire height of the platform 3. On the bottom of the concrete slab 3 set any, such as rigid insulation 8, which are used as permanent formwork, and molded cross ribs 6. Next, carry out the forming of the intermediate concrete slabs 4 to provide greater rigidity, mounted on her second insulating layer 8 similar to the first and molded cross ribs 6, and then the upper reinforced-concrete slab 5 and before forming the intermediate and top plates of the vertical reinforcement bars 7 connected with the fittings of these plates.

The method can be used as bulk insulation. In this case, for forming cross ribs 6 may be used formwork and absorbent insulation cover waterproof tape before forming the intermediate and upper concrete slabs.

The advantage of the proposed method of erection of the Foundation for heaving soils lies in the effectiveness of the design, due to the durability, reliability and efficiency, which is achieved due to the fact that:

earthworks information which are to a minimum, does not require the device of sandy;

the insulation is protected from moisture and possible destruction, i.e. ensured its durability and thus protection of the soil from frost heaving;

it is possible to install any insulation, as it has no load and not subject to mechanical stress;

plate design, insulation and floor works;

the base platform through intermediate concrete slabs and cross-ribs has a large spatial rigidity and distribution capacity, and therefore low sensitivity to uneven movement of soil under the influence of natural factors.

1. The method of construction of Foundation for heaving soils, including the installation of a base plate and insulation aligned on the base, characterized in that the prepared Foundation laid sliding layer and implement a monolithic multilayer construction of the spatial Foundation of the platform that contains the heater, when it is formed into the bottom of a reinforced concrete slab with vertical reinforcement bars in the cross-ribs on the entire height of the platform on the bottom of a reinforced concrete slab placed insulation with the ability to perform cross-ribs formed into the cross-ribs are molded intermediate concrete slabs, us is enableval a second layer of insulation, molded cross-ribs and perform the formation of the top concrete slab and vertical reinforcement bars connected with the valve all the layers of plates.

2. The method of construction of Foundation for heaving soils according to claim 1, characterized in that the absorbent insulation cover waterproof tape.

3. The method of construction of Foundation for heaving soils according to claim 1, characterized in that the sliding layer performs at least two layers of polymer film.



 

Same patents:

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FIELD: construction.

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FIELD: construction.

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Basement // 2367743

FIELD: construction.

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2 dwg

FIELD: construction.

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FIELD: construction.

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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: 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

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

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