Method of strengthening foundation

FIELD: construction.

SUBSTANCE: method of strengthening a foundation includes drilling a well, installing a pipe-injector, and pumping a fixing composition. After installing the pipe-injector, along the lateral surface of the two foundation sides and into the previously performed well, through which the injection has already been carried out, electrodes are immersed. A powder additive of an electrically conductive material is introduced into the fixing material, and while pumping the fixing composition, electrical resistance of the foundation body is measured between the pipe-injector and each of the electrodes.

EFFECT: increasing the reliability of the injection fixing of the foundation stone masonry due to ensuring the possibility of quality control during the production process.

1 tbl, 4 dwg

 



 

Same patents:

FIELD: construction.

SUBSTANCE: invention relates to the field of construction, namely to design of bases and foundations on anthropogenic soils, flooded territories, also when lifting and moving buildings and structures. The method to create a soil-reinforced base of buildings and structures includes erection and filling of shells via a pipeline-sleeve. The protective multi-shell system of man-made bases and foundations is arranged onto the prepared soil base, besides, in the beginning they install shield-platform from a composite material, having shape of memory, and strengthened with flexible anchor devices, then it is mounted with the help of a flexible link to flattened shells-jacks, besides, inside them they first make elements-sections divided in vertical and horizontal directions by flexible membranes-separators from composite nanomaterials, and then they are filled by working medium, which makes it possible to increase, decrease or maintain design height. To the lower shell-jack they mount shells-jacks by flexible links, and on the last of them they install an upper shield-platform, to which buildings or structures are fixed by flexible links. Then a central flexible rod is mounted with nozzles, fixing them to shells-jacks, and then connected to the shield-regulator and the container with working medium, after that they install a controlling system of sensors and connect them with the shield-regulator. Erection or transfer of the building or structure of this protective multi-shell man-made system is possible via pulling shells-jacks through prepared holes-trenches gradually under existing operated buildings and structures without shields-platforms and raising and lowering buildings and structures with account of the above method.

EFFECT: provision of safety and control of regulation of position of buildings or structures, prevention of emergency situations.

2 cl, 2 dwg

FIELD: construction.

SUBSTANCE: invention relates to construction, in particular, to reconstruction of underground parts of buildings and structures with reinforcement of existing foundations, exposed to considerable deformation from action of frost heaving forces. Reinforcement of foundations of buildings and structures prone to action of sign-alternating loads of soil freezing and thawing. Reinforcement of the foundation by augercast piles is carried out at the moment of maximum possible lifting of a building or a structure by forces of frost heaving.

EFFECT: invention provides for liquidation of negative impact of forces of frost heaving at construction structures of buildings and structures.

3 dwg

FIELD: construction.

SUBSTANCE: device for reinforcement of foundations with soil pressing includes an element of foundation expansion and elements used for soil pressing, connected with the foundation by steel rods. At the sides of the foundation at four sides with the help of anchors installed in the foundation body on epoxide glue, monolithic reinforced concrete cantilevers are fixed, having embedded parts in the form of a pipe with nuts welded at the ends, and at the sides - with welded rods, which fix the position of the embedded part in the body of the cantilever and bolts connected with the embedded part of the helical thread and resting with a free end against a reinforced concrete expansion belt.

EFFECT: increased load-carrying capacity and reduced subsidence of foundations.

3 dwg

FIELD: construction.

SUBSTANCE: method for reinforcement of strip footing includes jacking a multisection pile with a jack, concreting of its cavity and formation of a pile support unit. Jacking is carried out above a foundation slab, at the same in foundation blocks of the wall basement part an opening is arranged, limited on top with a link formed by a support foundation block, and the lower part of the opening is limited with a foundation slab. A hole for a pile is made in the slab, and via the hole the multisection pile is jacked from the opening with the help of a jack rested against the support foundation block installed above the opening. Formation of the support unit of the multisection pile is carried out without release of stress off the jack, at the same time elements of the support unit are used, which transfer an effort from the pile to the support foundation block.

EFFECT: reduced labour inputs, lower concrete consumption, expanded area of application also for reinforcement of a foundation with a wide slab part.

2 cl, 4 dwg

FIELD: construction.

SUBSTANCE: method to reinforce structure foundations includes installation of a barrier along the foundation perimetre, filling of bases and erection of a foundation. The barrier is made from separate vertical elements installed with a distance between their axes sufficient to form an arc effect between them, and submerged to depth corresponding to the zone of base compression with a foundation. Base filling is carried out with a coarse-grained material, thickness of the layer and grain size of which are selected on the basis of provision of the maximum value of material friction forces along barrier elements. The foundation is erected with gaps between them and barrier elements providing for free vertical displacement of the foundation.

EFFECT: higher efficiency and reliability of reinforcement of structure foundation bases on dispersed soils, reduced absolute subsidences of foundations.

2 dwg

FIELD: construction.

SUBSTANCE: method to balance buildings and structures including drilling in soil of wells. A pit is dug at the side of a least sunk part of a building, a structure. The depth of the pit, under which damage starts, is determined with account of maximum depth of well drilling from the foot according to the given dependence. Assembly of rails or guides perpendicularly to a list direction. Assembly of a plant for horizontal drilling of wells. Drilling of horizontal wells of alternating diametre in one row in several stages. The diametre of wells is selected based on structural assumptions and based on possibilities of the drilling plant. Based on the selected dimensions, a pitch of drilling wells, the rated pitch and the diametre of wells is determined according to the calculation based on the pressure value to be pulled when drilling for sight pillar damage, at the same time the damaging pressure is defined using the given dependence.

EFFECT: invention provides for levelling of buildings and structures exposed to uneven deformations of a base without soaking, lower material intensity and labour intensiveness.

3 dwg

FIELD: electricity.

SUBSTANCE: method of foundations reinforcement and attachment of power transmission towers to them involves reinforcement of damaged part of foundations with load-carrying frame and reinforcement of fasteners of towers to foundations. In order to increase load-carrying capacity of damaged fasteners in load-carrying frame there installed are protruding bars which are attached to bases of steel towers.

EFFECT: improving reliability and serviceability, and reducing operating costs.

4 cl, 1 dwg

FIELD: construction.

SUBSTANCE: method of shallow strip foundation reinforcement contains anchors, an artificial basement with a curvilinear surface, and a shell located on the basement. Bearing elements in the form of reinforced concrete shells formed on the curvilinear surface of the artificial basement filled under pressure with the cement mortar arranged in the cellar and facing upwards with its convexity, are fixed with their edges to the anchors fixed in the body of shallow strip foundations, against which the bearing walls rest.

EFFECT: higher bearing capacity of the basement, reduced material intensity, provision of reinforcement of existing shallow strip foundations with observation of the specified reliability of the above-foundation structure.

2 dwg

FIELD: construction.

SUBSTANCE: foundation strengthening structure comprises a reinforced concrete slab structure with ribs that is solidly embedded into the existing foundation and is placed into the prepared base. A double-layer reinforced concrete slab structure is used for reinforcement, comprising lower and upper layers, which are combined by crossing ribs and reinforcement, between which there is heat insulation material. The upper layer is made in the form of a floor bearing structure and is arranged in the area of the foundation foot.

EFFECT: higher efficiency of the structure by means of foundation slab strengthening, reduction of its dimensions along height, higher operational capability of the lower floor, reduced material intensity, reduced pressure at soil.

1 dwg

FIELD: construction.

SUBSTANCE: method to eliminate heel of supports in restricted areas consists in the fact that a support is fixed by slings, is cleaned from soil, is put into a vertical position, and a fastening device is installed near the support base, is rigidly fixed perpendicularly to the support, and then the fixtures are removed. The support is fixed with the help of a metal yoke, which is fixed at height that facilitates operation of a hoist, and by means of a sling it is connected at the opposite side of heel to the hoist. The area of the initial vertical arrangement of the support is drilled around with blast holes to the depth that corresponds to its base, where a low-capacity explosive is placed, for instance, DShU-33M, and the free part of the blast hole is filled with a plug that contains a flash eliminator, for instance, table salt. The area of charges explosion is covered with a protective screen, which confines harmful factors of explosion, they are blasted, and the support in vertical position is installed in the cavity cleaned from soil with the help of the hoist. Used pipes are applied as a fastening device. At the same time two sections of the required length are cut, in every of which there is an oval hole made with dimensions that ensure tight adjacency to the external surface of the specified pipe, and the remaining section of the pipe is cut along into two trays, which are welded perpendicularly into oval holes of the fastening devices, afterwards the larger part of the tray is inserted into a cavity prepared by microexplosions, and the fastening device is pressed to the surface of a previously dug out trench, the depth of which ensures its underground location. Then a similar process operation is carried out at the other side of the support, afterwards the trays that are tightly pressed to the surface of the support are welded.

EFFECT: acceleration and cheapening of works to eliminate heel of supports in restricted areas in close proximity to operating production facilities, including gas-hazardous enterprises.

2 cl, 1 ex, 4 dwg

FIELD: building, particularly for reinforcing foundations built on soil base in the case of increased loads applied to them and in the case of soil structure failure.

SUBSTANCE: method involves excavating foundation pits, compacting soil by placing reinforcing members, namely microtunnels filled with hardening material under foundation along the full length thereof. Microtunnels are formed by pushing and compacting soil with the use of cone with through channel moving under base. Hollow tie rod is arranged in cone channel. Hardening material is fed through tie rod into microtunnel formed after the cone. Cone axis is located so that compacted soil boundary adjoins foundation base. Distance between cone axis and foundation base is determined from a given relation.

EFFECT: possibility of soil compaction without welding operation use; increased load bearing capacity of foundation and building structure stability due to increased load-bearing capacity of soil.

2 dwg

FIELD: building, particularly for increasing load-bearing capacity of foundation built on earth base in the case of foundation load increase or in the case of natural structure of earth base damage.

SUBSTANCE: method involves digging out pit and arranging reinforcement means under foundation bottom along the full length thereof. Microtunnels filled with hardening material are used as reinforcement means. Microtunnels are arranged so that sides of each microtunnel are in contact one with another or with foundation bottom. Microtunnels are formed by driving drilling auger in ground under foundation bottom along the full auger length. Drilling auger has through channel for pumping hardening material into microtunnel formed past auger end after extraction thereof out of ground.

EFFECT: increased load-bearing capacity.

2 dwg

FIELD: building, particularly for reinforcing foundations built on earth base in the case of foundation load increase or in the case of natural structure of earth base damage.

SUBSTANCE: method involves digging out pit and arranging puncturing mechanisms in the pit; compacting ground under the foundation by moving reinforcement members under foundation bottom along the full length thereof; forming compacted ground area by releasing and radial compacting thereof; puncturing ground under foundation along the full foundation length with metal pipe, wherein cylindrical concrete blocks having through channel formed along axis thereof are used as reinforcement members; putting concrete blocks on free metal pipe end and compacting ground under foundation by impressing concrete blocks into ground of the base. Distance between concrete block and foundation bottom is determined from a given relation.

EFFECT: increased load-bearing capacity.

2 dwg

FIELD: building, particularly for foundation reinforcement.

SUBSTANCE: method involves excavating trenches from both foundation sides and installing relieving beams on supplementary foundations; wedging out the relieving beams by installing supports between relieving beam ends and driving wedges, wherein each wedge has 30° taper angle and wedge surface is provided with scale adapted to control vertical foundation movement; excavating ground from under foundation with free space creation; filling the free space with grout expanding during hardening thereof; concreting the structure. Distance between corresponding foundation and additional foundation is equal to slope ratio.

EFFECT: simplified technology due to wedging out the relieving beams and using compositions, which expand during hardening.

1 dwg

FIELD: building, particularly to erect underground building part having foundation supported by timber groundsill.

SUBSTANCE: method involves cutting pit, arranging reinforcing members under base bed for the full length thereof; filling reinforcing members with hardening material. Timber groundsills are optionally substituted for reinforcing members made as pipes having diameters exceeding that of timber groundsills by driving thereof so that timber groundsills pass into the pipes. Then the timber groundsills may be removed from the pipes.

EFFECT: increased load-bearing foundation capacity.

3 dwg

FIELD: building, particularly to increase load-bearing foundation ability during building repair and reconstruction.

SUBSTANCE: method involves digging-out trench in several sections for depth equal to widening member installation depth and depressing the widening members under foundation bed, wherein the widening members are pairs of blocks made as wedges provided with depressions, which are serially depressed under foundation bed with the use of jack lowered in trench; placing metal rod adapted for horizontal widening members connection in depression; fastening reinforcing net to side foundation surface; inserting lower part of reinforcing net in depression; grouting the net and filling the depression with cement mortar.

EFFECT: increased simplicity and possibility of operations performing from outer building sides.

2 dwg

FIELD: building, particularly to reinforce foundations of existent buildings and building structures.

SUBSTANCE: reinforcing structure comprises additional bored pile foundation and grillage connected to the bored piles and monolithically connected with foundation to be reinforced. The grillage is located from outer building side. Additional foundation includes one pile row and is hinged to grillage.

EFFECT: reduced labor inputs and increased efficiency of the structure.

3 dwg

FIELD: construction, particularly pile foundation reinforcement.

SUBSTANCE: method involves increasing load-bearing pile capacity by displacing pile ends in opposite directions with respect to initial pile positions transversely to pile axes. Lower pile ends are displaced by injection of consolidation mix into space over pile ends through injector in two stages. At the first stage consolidation mix is injected under 0.1-0.2 MPa pressure; at the second stage pressure of consolidation mix to be injected is risen up to 2 MPa or consolidation or inert mix is injected in space between piles over pile ends through injector with releasable shell to form cylindrical or spherical body. After partial consolidation mix hardening the injector is removed from ground.

EFFECT: possibility to increase load-bearing ability of pile foundations after foundation construction.

5 cl, 4 dwg

FIELD: construction, particularly foundation reinforcement.

SUBSTANCE: method involves preliminarily forming orifices in foundations; installing hollow cylindrical anchoring means in the orifices; securing each anchoring means inside foundation orifices; serially impressing anchoring means freely passing through cavities up to predetermined depth with the use of support structure including hydraulic jack and providing engagement of anchoring device section projecting over upper foundation surface; securing head member of each pile. The hollow cylindrical anchoring means is anchoring pipe having constant outer diameter along pipe length. Anchoring means are fixed inside foundation orifices by hole annuity cementing. Anchoring device section projecting over upper foundation surface is engaged by means of hinged clip shaped as cylinder split into two parts in vertical direction. The cylinder parts are connected with each other through bolts. Hinged clip is supported by ring fastened to upper plate of support structure through tension bars. Radially bent dies are inserted in depressions created from inner clip side and blind from ends thereof. The dies have corrugated or serrated concave surfaces mating that of anchoring pipe. Dies are secured to anchoring pipe by die pressing with bolts, which connect hinged clip parts. Composite pile components are serially impressed by hydraulic jack shaft installation on pile component top and by hydraulic jack cylinder supporting by lower surface of upper plate. After that head pile member is secured by cementing space between pile and inner anchoring pipe surface.

EFFECT: increased efficiently and reliability, decreased costs.

3 cl, 3 dwg

FIELD: construction.

SUBSTANCE: invention is attributed to methods for repairing, strengthening and protection from environmental harmful impacts of in-service reinforced concrete foundations, stands and piles used for equipment of switching stations and for intermediate or angle-tension towers of power lines, or building structures of buildings. Method for strengthening and protection of old reinforced concrete foundations, piles and stands of electrical installations form environmental impact consists in that steel protective casing including two semicylinders is created around existing disrupted reinforced concrete structure for the rest lifetime. Semicylinders have designed protection length in overground and underground zones and wall thickness providing intended lifetime for reinforced concrete structure with regard to galvanic influence thereon of reinforcement in concrete. Semicylinders are sealed together by welding. Side inner cavity formed between protective casing and old reinforced concrete structure is filled with old structural concrete or other compound. In upper overground part, waterproof plug with atmospheric covering is installed, underground part of protective casing being used as natural earth lead for electric installation.

EFFECT: improvement of reinforced concrete structure fastness to environmental impacts.

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