Method to reinforce precast panels of surface from cellular concrete
SUBSTANCE: invention relates to the field of construction, in particular, to the method to reinforce precast panels of cellular concrete surface. The method of reinforcement consists in the fact that the roof structure is opened along the seam of coupling of adjacent panels for the width of 300-400 mm. Then they cut through slots with width of 85-90 mm along the seams through the entire length of the panel, afterwards they insert longitudinal steel beams into the slots from the top, having gussets at the bottom to fix cross beams. Cross beams are connected to longitudinal beams and are connected by gussets with longitudinal beams by assembling bolts. Gaps between cross beams and the reinforced panel are filled with concrete, and gaps between longitudinal beams and side surfaces of panels are filled with construction foam. The slot above the surface of longitudinal beams is filled with a heat insulation material, then the roof design is restored, and steel reinforcing elements protruding beyond the ceiling surface are coated by protective materials.
EFFECT: increased bearing capacity of a coating panel.
4 cl, 8 dwg
The present invention relates to the field of construction and can be used to enhance prefabricated panels covering of cellular concrete with significant damage and insufficient bearing capacity.
Feature panels covering of cellular concrete are high porosity and low strength concrete, a significant effort to penetrate the panels and seams corresponding to the line interface of adjacent panels through the gap that you can use to organize the elements of the device gain.
The known method of strengthening reinforced concrete panels by engaging them cross beams resting on the lower flange of the longitudinal steel beams of the building frame and equipped with screw spacer devices that are installed in the gaps between the transverse beams and panels.
For reasons that impede the achievement of specified following technical result when using the known method of strengthening reinforced concrete slabs, is that in the absence of longitudinal steel beams in the frame of the building is much more complicated interface Assembly of transverse steel beams with reinforced concrete rafters and trusses, and this leads to over-consumption of metal (Pat. 2388882 EN, IPC-7, E04G 23/02, a method of enhancing Zhelezobeton�different panels).
The closest technical solution to the invention by the combination of features is a method of strengthening reinforced concrete slabs by summarizing the steel cross beams with changing the design scheme of the panels; the width of the beams can accept up to 100 mm, and the height to 1:10÷1:12 span /Recommendations for the assessment and strengthening of building structures for industrial buildings and structures./ Scientific-investigational center. - M.: stroiizdat, 1989, - 105 p. (see p. 28, p.4.30, figure 2, D; p. 35, p 4.35); /  is a prototype.
For reasons that impede the achievement of specified following technical result when using the known method of strengthening of prefabricated panels, taken as a prototype, is that the installation of the reinforcement elements at the top of the panels reduces the effective area of overlap/cover, increases working height, creates inconvenience in the installation and operation of the roof; construction steel cross beams are unreliable communications in width usraeli panels and require a large expenditure of material gain; the use of steel beams without protective coating significantly reduces the actual corrosion resistance and fire resistance of steel beams.
The invention consists in the following.
The problem to be solved by the claimed invention, with�is the study of the physical condition of cover panels of aerated concrete and check calculations of panels and elements of the device gain in bearing capacity, in a rational device design the gain of the panels, more economical and technically simple restoration of their basic operational characteristics, to reduce the amount of repair work.
1. A method of enhancing prefabricated panels covering of cellular concrete by the supply of additional steel beams is characterized in that first, examine the physical condition of the panels and perform confirmatory analysis of panels and elements of the device gain in bearing capacity. Then design and fabricate the elements of the device gain. After that reveal the design of the roof along the seam of a pair of adjacent panels at a width of 300-400 mm; disc saw or otherwise cut along the seams the entire length of the panel through the gap of a width of 85 to 90 mm. then in slit from top to insert longitudinal steel beams, supporting beams of the building frame. Then to the bottom longitudinal beams fail transverse steel beams and connected to the longitudinal beams via the beams gusset plate mounting bolts. The gaps between the longitudinal beams and the lateral surfaces of the panels are filled with foam, and the gap above the surface of the longitudinal beams is filled with mineral wool insulation. Then restore the roof structure and projecting beyond the ceiling surface of the panels with steel reinforcement elements cover protect�time materials.
2. A method according to claim 1 is characterized in that the longitudinal steel beams of I-section before installation in the cracks welded on the bottom with an interval of 0.25 m beam length steel plate-gusset plate of rectangular shape having two holes for mounting bolts.
3. A method according to claim 1 is characterized in that the transverse steel beams of I-section at the ends perpendicular to the longitudinal axis of the welded steel plates-gusset plate of rectangular shape having two holes for the mounting bolts.
4. A method according to claim 1 is characterized in that the mating longitudinal and transverse beams connected through the gussets in the holes of the mounting bolts, and the gaps between the transverse beams and the panel is filled with fine concrete of strength class B15, hard consistency. After concrete gains strength at least 80% of the amplification device included in the work.
The technical result - a qualitative study of the physical condition and checking calculations of bearing capacity of reinforced panels covering of cellular concrete, the technical feasibility of restoring the performance characteristics of the panels, a significant increase in strength to the action of bending moment and shear forces as well as the stiffness of the panels; the establishment of a reliable connection usraeli panels and the mating elements of the device gain, no�their welding work at height; efficient recovery of heat-insulating properties of the floor after amplification, the minimum effort required for the installation of the device gain.
Said technical result when using the invention is achieved by means of a special device shown in the drawings Fig.1-8.
Fig.1 shows a schematic fragment Silaeva coating and design of gain in the collection.
1 - rafter beam; 2 - useljena cover panel; 3 - longitudinal steel beam amplification; 4 - cross-section steel beam reinforcement.
Fig.2 shows a cross section 1-1 Silaeva coating and design of gain in the collection.
3 - longitudinal steel beam amplification; 4 - cross-section steel beam strengthening; 5 - studs/bolts with a diameter of 16 mm; 6 - heater; 7 - steel plate/fasono; 9 - grained concrete class B15.
Fig.3 shows a longitudinal section 2-2 Silaeva coating and design of gain in the collection.
1 - rafter beam; 3 - longitudinal steel beam strengthening; 6 - heater; 7 - steel plate/fasone.
Fig.4 shows a diagram of longitudinal steel beam amplification device in the form of a rolled I-beams, 3, with welded steel plates/gussets, 7.
Fig.5 shows a cross section a-a, longitudinal steel beam amplification device in the form of a rolled I-beams, 3, with welded�bubbled steel plates/gussets, 7.
Fig.6 shows a plate/Vasenka with 7 holes for the mounting studs/bolts 5.
Fig.7 shows a diagram of a transverse steel beam device gain from rolled I-beams, 4, with welded steel plates/gussets, 8.
Fig.8 shows a cross section b-b transverse steel beam device gain, 4, with welded steel plate/fasanmi, 8.
The order of execution of works to strengthen the next panel.
First, examine the physical condition of the panels and perform confirmatory analysis of panels and elements of the device gain in bearing capacity. Design and fabricate the elements of the device gain.
Open roof construction along the seam of a pair of adjacent panels at a width of 300-400 mm. Disc saw or otherwise cut along the seams the entire length of the panel through the gap of a width of 85 to 90 mm, then in slit from top to insert longitudinal steel supporting beams 3, for supporting beams of the building frame. To bottom longitudinal beams fail transverse steel supporting beams 4 and connected to the longitudinal beams through the gusset plate on the beams 7, 8 mounting bolts 5. The gaps between the longitudinal beams and the lateral surfaces of the panels are filled with foam, and the gap above the surface of the longitudinal beams fill insulation/mineral wool 6. The gaps between pop�river gain beams 4 and amplified by a panel filled with fine concrete grade 9 B15, hard consistency. Restore the design of the roof, and projecting beyond the ceiling surface of the panels with steel reinforcement elements are covered with protective materials.
1. A method of enhancing prefabricated panels covering of cellular concrete by the supply of additional steel beams, characterized in that first, examine the physical condition of the panels and perform confirmatory analysis of panels and elements of the device gain in bearing capacity, then design and fabricate the elements of the device gain, then reveal the design of the roof along the seam of a pair of adjacent panels at a width of 300-400 mm; disc saw or otherwise cut along the seams the entire length of the panel through the gap of a width of 85 to 90 mm, then in slit from top to insert longitudinal steel beams, supporting beams of the building frame, then to the bottom longitudinal beams fail transverse steel beams and connected to the longitudinal beams via the beams gusset plate mounting bolts, the gaps between the longitudinal beams and the lateral surfaces of the panels are filled with foam, and the gap above the surface of the longitudinal beams is filled with insulation - mineral wool; then restore the roof structure and projecting beyond the ceiling surface of the panels with steel reinforcement elements are covered with protective materials.
3. A method according to claim 1, characterized in that the transverse steel beams of I-section at the ends perpendicular to the longitudinal axis of the welded steel plates-gusset plate of rectangular shape having two holes for the mounting bolts.
4. A method according to claim 1, characterized in that the mating longitudinal and transverse beams connected through the gussets in the holes of the mounting bolts, and the gaps between the transverse beams and the panel is filled with fine concrete of strength class B15 hard consistence; after concrete gains strength at least 80% of the amplification device included in the work.
SUBSTANCE: method to reconstruct a building or a facility includes installation of stiffening cores inside a building or their erection to perceive load from bearing elements of the building or facility carcass. Stiffening cores are installed with a gap in respect to reinforced spans of floors, under which bearing girders are mounted. Girders are fixed in stiffening cores at the depth of at least half of thickness of the appropriate stiffening core perpendicularly to the latter and are connected as fixed with spans. Spans are made in the form of crossbars and floors, or crossbars, or floors. Ends of bearing girders are embedded into stiffening cores.
EFFECT: increased stability of a building.
SUBSTANCE: invention relates to the field of construction and may be used for radical reinforcement of slabs exposed to durable impact of aggressive medium and having practically lost bearing capacity. The device to reinforce a solid reinforced concrete slab includes several reinforcement elements and comprises two additional solid reinforced concrete slabs arranged on the top and at the bottom and combined to each other by means of reinforced concrete keys. The lower slab is equipped with rods with helical thread at the ends, performing the function of the pre-stressed working reinforcement, connected on nuts with anchors, which serve as stops for them. Anchors are connected with the main slab as a dowel by epoxide glue. Keys are equipped with vertical rods performing simultaneously the function of working reinforcement of keys and function of suspension in fixation of the lower slab formwork. The surface of contact between the main and lower slabs is equipped with a layer of compound on the basis of epoxide resin preventing access of aggressive medium to working reinforcement.
EFFECT: increased bearing capacity, stiffness and crack resistance of a slab.
SUBSTANCE: method to reinforce structures of a building cover, comprising bearing structures, runs and an enclosure, consists in installation of reinforcement beams from channels resting against bearing structures between existing runs. In the areas of resting of reinforcement beams onto bearing structures they cut a section of an upper shelf of a channel, using welding, they fix a similar section at the opposite side, turning cross sections of the channel into a z-shaped one. Final installation of reinforcement beams is carried out by means of their rotation around the longitudinal axis.
EFFECT: reduced labour intensiveness during installation of a cover and increased reliability of joint operation of cover structures after reinforcement.
SUBSTANCE: invention relates to the field of construction, namely, to a support element designed for pasting-in into brick masonry and used in assemblies of slab support. The support element comprises a central rod and end anchor parts. The central rod is made of a concrete cylinder, having longitudinal corrugations on the outer side for better spread of an injectable formulation with depth of 0.1-0.5 cm and two transverse corrugations for installation of fixing rings with depth of 0.1-0.5 cm: an inner aligning ring in the form of a sprocket and an outer fixing ring with a reference hole in the upper part. In the centre of the cylinder there is a through hole for installation of the nozzle into it for injection of the chemical formulation.
EFFECT: increased strength of a support element.
3 cl, 3 dwg
SUBSTANCE: device to reinforce beam structures includes prestressed four-branch braced ties fixed at ends of the beam in its upper part, resting in areas of bending at hinged cylindrical supports with a pad, installed in the lower part of the beam and tightened by yokes. In the upper end zone of the beam there are angular profiles installed onto a footing, where braced ties are fixed as a tightened assembly.
EFFECT: increased bearing capacity due to balance of forces in all bands of a braced system.
2 cl, 4 dwg
SUBSTANCE: invention relates to the field of construction, in particular to protection against oxidation of the active and passive frames laid in the concrete mass. A method of injecting fluid into a porous material or a material having boundary lines, comprising the following steps is revealed in the invention: attachment of an injector to the indicated material, which defines the boundaries of a compression chamber at least with one surface of the indicated material; injection of the indicated fluid into the indicated compression chamber under low pressure; influence on the indicated fluid by an acoustic wave of high power by means of an oscillating element, passing directly into the indicated compression chamber.
EFFECT: provision of deep impregnation of surfaces or boundary lines of heterogeneous materials.
14 cl, 3 dwg
SUBSTANCE: invention relates to methods of reinforcing power constructions, which have existing or predictable collapsing sections, by means of strips of composition material. As strips used is woven or non-woven reinforcing filling agent from glass, basalt, synthetic polymer or carbon fibres. Said fibres are impregnated with polymer composition in amount 30÷60% from composite weight, providing their adhesion to power constructions and further hardening from +5°C to +100°C for from 5 minutes to two days. Polymer composition contains in wt %: epoxy resin 100, active epoxy diluent 5÷130, hardening agent 15÷110, thickening agent 5÷50, pigment or dye 0.5÷50. As gardening agent it contains product of interaction of amine component with monocarboxylic acids. as amine component used is mixture, consisting of primary aromatic amine or mixture of aromatic amines (A), secondary aliphatic amino alcohol (B) and tertiary aliphatic amino alcohol (C) in weight ratio A:B:C from 98:0.2:1.8 to 80:5:15. Monocarboxylic acid (D) is introduced in form of 25÷80% solution in monoatomic aliphatic or aromatic alcohol, or their ether with mono- or dicarboxylic acid, in ratio (A+B+C):D from 90:10 to 60:40 counted per 100% acid with further interaction by mixing in reactor at temperature from 50 to 130°C for from 20 to 120 minutes at rate of mixer from 100 to 3000 revolutions per minute.
EFFECT: increased adhesion of reinforcing strips from composition materials to the surface of constructions and their more effective reinforcement are provided.
SUBSTANCE: in the method to repair a building facade, including dismantling, of at least a part of masonry of oil facing bricks and development of new masonry of facing bricks with fixation on the bearing wall of the building, according to the invention, development of new masonry and its fixation is done by fixing anchors in the bearing wall of the building, onto which horizontal rows of reinforcement are laid, on each of which, using mortar, they lay several rows of bricks with a gap relative to the bearing wall of the building, at the same time the first and last rows of the new masonry of facing bricks are arranged with horizontal ventilation gaps in respect to the old masonry. Besides, as the masonry is fixed onto the bearing wall of the building, in the specified gap they lay mortar in the form of vertical strips that connect areas of fixation of anchors, for additional fixation of bricks and elimination of anchor corrosion.
EFFECT: increased service life of a repaired facade of a building without change in its appearance, elimination of moisture condensation on a facing brick and in a facing brick due to formation of a ventilation gap in the facade, due to which a directed air flow from bottom up, which carries away warm moist air from a wall, preventing moisture condensation, increased service life of a facade happens due to suggested reliable fixation of facing brick masonry on a bearing wall of a building.
SUBSTANCE: reconstructed building includes the old building with foundation and upper overlapping, additional foundation located lengthwise outer perimeter of the old building, vertical columns located on additional foundation with at least one interfloor overlapping located above the old building, and overlapping installed on upper part of vertical columns and connected to them, and walls fixed between vertical columns. Reconstructed building contains in addition at least one load-bearing suspension located above the old building and connected to the mentioned overlapping. Additional foundation is made so that its loading is out of the area of power impact of the old building on the foundation. Overlapping is designed as load-carrying structure. Interfloor overlapping is connected to load-carrying structure by at least one load-bearing suspension, it is mounted in direction from load-carrying structure to upper overlapping of the old building and is designed with possibility of interaction with vertical columns.
EFFECT: improving operating reliability of reconstructed building.
SUBSTANCE: spacers of a steel shell are made in the form of a pair of angular stands and connection planks, which are fixed to each other by means of a welded joint in the form of a complex joint, at the same time the connection plank is made as a steel plate, dimensions and shape of the end and middle section of which is taken from the conditions of the bearing capacity of the plank and the welded joint.
EFFECT: higher reliability of operation of welded joints in a butt joint and overlapping, reduced metal intensity and higher fire protection of steel shell spacers to reinforce a column.
15 cl, 11 dwg
FIELD: building, particularly for concrete structures reinforcing.
SUBSTANCE: structure includes trussed tie bar and additional compressed member. Structure is provided with telescopic post having spring. Post is arranged between trussed tie bar and compressed member formed of channel bar. Compressed member is located in level with lower belt of beam to be reinforced and encloses it. Trussed tie bar ends are connected to compressed member, which in turn is secured to beam to be reinforced by compressed member ends through collars.
EFFECT: increased load-bearing capacity, reliability and service life of reinforced concrete floor beams and longitudinal ribs of ribbed slabs, possibility of full residue bearing capacity usage of structure.
FIELD: building, particularly to prevent separation of roofing material layers during roof repair.
SUBSTANCE: method involves injecting material forming liquid bitumen layer in roof area of separation through orifices arranged in waterproofing mat above the area; consolidating the area to be repaired. Orifices are spaced 0.2-2.0 m apart. At the beginning of material injection process air or water is removed from the cavities through above orifices and then emulsified bitumen, including 30-80% of bitumen, is fed. Emulsified bitumen is spread in cavity over the full area of separation using weight, which is moved over the roof surface. Before compaction the area of separation is heated up to 100-160°C and then held at this temperature up to bitumen dewatering and water vapor discharge from the area through above orifices in atmosphere.
EFFECT: increased reliability of waterproofing mat gluing in presence of water cavities regardless of separation area and reduced time of roof repair.
FIELD: building, particularly building reconstruction.
SUBSTANCE: method involves forming main drilled piles along building foundation perimeter, where the piles are arranged outside the foundation; mounting the main load-bearing supports on the drilled piles so that load-bearing supports are arranged in pairs from opposite sides of the building; mounting load-bearing girders on load-bearing vertical support heads, wherein the bearing girders are arranged in rows; erecting additional stories on the bearing girders. Main drilled piles extend for depth not less than building foundation depth in ground. Upper pile parts are pulled together in pairs. Additional drilled piles adapted to support additional load-bearing vertical supports are driven outside the building foundation beyond the main ones. At least one additional load-bearing support is arranged in the main vertical support row from one building side.
EFFECT: prevention of service performance reduction.
16 cl, 2 dwg, 2 ex
FIELD: building, particularly to recover load-bearing capacity of reinforced concrete frames of industrial and civil buildings.
SUBSTANCE: method to recover load-bearing capacity of reinforced concrete column subjected to concrete and reinforcement corrosion by column surface moistening, scoring, column cross-section widening, enclosing with ferrule and reduction of longitudinal compressing force application eccentricity involves deforming steel pipe; reducing steel pipe cross-section by compressing thereof with two rollers to impart oval cross-section to the pipe so that major oval axis is equal to three minor axes; cutting the pipe in longitudinal direction; inserting damaged column in steel ferrule so that major cross-sectional axis is directed in plane of compressing force application eccentricity and reducing eccentricity; connecting two halves of oval pipe in air-tight manner and filling gaps between steel ferrule and damaged column with expanding fine concrete injected through nozzles in the cavities in bottom-top direction; compacting concrete with vibratory action and applying stress to cross-section during concrete setting by compressing thereof from all sides by steel form to reinforce the whole structure.
EFFECT: possibility to recover load-bearing building frame capacity without production process stopping and decreased labor inputs.
FIELD: building, particularly to repair beams, walls, columns and poles.
SUBSTANCE: method involves installing reinforcing members on structure to be reinforced and connecting the members with fastening members; welding the fastening members to one reinforcing member; heating thereof and welding the heated members to opposite reinforcing member; terminating the heating operation. The fastening members may be installed between reinforcing member surfaces or laid on ends thereof. In the first case initial fastening member length is determined from the following equation: L=SBH-α·(T-Ta), where SBH is distance between inner reinforcing member surfaces, α is linear expansion factor of fastening member material, T is fastening member heating temperature, Ta is ambient temperature. In the second case fastening member length is defined as L≥So, where So is distance between outer surfaces of reinforcing members.
EFFECT: increased reliability of structure to be reinforced.
FIELD: building, particularly roof repair and waterproofing.
SUBSTANCE: method involves arranging roof paper between coating area to be repaired and movable heating member; heating organic binding material to soften thereof by means of the heating member; compacting the coating along with rolling-on roofing paper to heated coating.
EFFECT: increase service life of waterproof covering.
5 cl, 1 tbl
FIELD: building, particularly to repair waterproof coatings and roof coverings including organic binding agent.
SUBSTANCE: method involves determining brittle temperature of organic binding agent; calculating plastic range thereof; heating organic binding covering with heating member laid on the covering and compacting the covering. The organic binding agent is heated up to temperature 1.6-3.2 times greater than plastic range.
EFFECT: increased service life of repaired coating and increased quality thereof.
FIELD: repairing, for instance filling cracks, restoring, altering, enlarging, particularly for repairing monuments, museum pieces and applied and decorative art pieces.
SUBSTANCE: method involves drying joint and filling thereof with dry non-combustible materials before lead-based molten material pouring in joint; filling the joint with lead-based molten material, which is supplied through pouring channel system made of molding material, wherein the molding material provides predetermined geometry of sealed joint. The molten material is supplied as continuous jet. Joint to be sealed may be located in vertical or horizontal planes or in plane inclined at 0-90° angle with respect to horizontal plane. The lead-based molten material may be reused for repairing work performing.
EFFECT: reduced labor inputs and material consumption, increased environmental safety and joint sealing reliability, elimination of additional mechanical or chemical treatment.
17 cl, 2 dwg
FIELD: construction, particularly building reconstruction.
SUBSTANCE: method involves erecting foundation of inserted structure, forming through pass in-between and constructing one or several stories over the foundation. The stories are built of kit including vertical panels and floor panels, which are connected with existent building walls by tie members. Joints are hermetically sealed. Floor panels are installed on guiding means having opened parts. Opened parts of guiding means are welded with each other after structure assemblage. Roofs of adjacent buildings are extended up to inserted structure walls. Projection adapted to drain water from the structure is hermetically installed over joint between the roof and the inserted structure. Guiding means are made as outer centralizers in upper parts of vertical and floor panels and as inner centralizers in lower panel parts.
EFFECT: increased strength and air-tightness.
12 cl, 14 cl, 2 ex
FIELD: construction, particularly working measures on existing buildings.
SUBSTANCE: superstructure skeleton comprises lower row transversal frames arranged within the limits of building length and lower end transversal frames projecting out of the building length and including two belts. The end transversal frames have columns and trusses located from building outside and provided with parallel belts. Arranged in the trusses are upper row and end frames having two belts and including columns and trusses. Skeleton also comprises floor panels. Lower superstructure stories are provided with central columns installed in lower frame truss joints and are united with each other by structural stands of intermediate stories. Space of one intermediate story is free of frame structures. Main beams of upper intermediate stories are secured to upper frame trusses by means of suspension brackets.
EFFECT: decreased metal consumption of superstructure skeleton.