135 results about "Rebar" patented technology

The invention discloses a mixed steel-concrete composite frame structure, belonging to the technical field of engineering structure. The frame structure comprises a composite column of reinforced special shaped steep pipe concrete, a composite beam of concrete-steel pipe partially filled lightweight aggregate concrete and a reinforced concrete floor; wherein, the composite column of reinforced special shaped steep pipe concrete comprises a steel pipe of a special shaped column, a longitudinal bar of the column, stirrup of the column, concrete outside the steel pipe of the column and core concrete inside the steel pipe of the column; the composite beam of concrete-steel pipe partially filled lightweight aggregate concrete comprises a steel pipe of the beam, an inner separator, a longitudinal bar of the beam, stirrup of the beam and concrete outside the steel pipe of the beam; the space formed by the steel pipes of the beam, which are positioned on the lower part of the steel pipe at the end of the beam and on the upper part of the steel pipe on the midspan of beam, and the inner separator is filled with the core lightweight aggregate concrete in the steel pipe of the beam. The frame structure of the invention has excellent fire and shock resistance and relatively light dead load, can be used in building structures such as residence and is convenient for effective use of building space.

The invention discloses a production process of high-ductility cold-rolled ribbed steel bars. The production process comprises the following steps of: (1) performing primary rolling mill reducing on steel coils wherein the reducing ratio is 0.79 to 0.87; (2) performing secondary rolling mill reducing and nicking at the same time on the steel bars subjected to the primary rolling mill reducing in the step (1), wherein the reducing ratio is 0.59 to 0.88; (3) thermally treating the steel bars subjected to the rolling mill reducing and nicking at the same time in the step (2) for 1 to 3 seconds at the temperature of between 550 and 670 DEG C; and (4) naturally cooling the steel bars thermally treated in the step (3) in the air. After the common I and II-grade steel bars are treated by the process, internal tissues and granularity of the steel bars are changed, so that the strength and the elongation of the steel bars are improved, exceed those of the III-grade steel bars and are close to those of the IV-grade steel bars. Trace elements such as titanium, niobium, vanadium and the like do not need to be added, so the consumption of rare metals is reduced.

A device for detecting the state of steel-reinforced concrete construction parts, having one or more sensor wires disposed at different distances from a surface of the concrete construction part. The wires are subjected to the corroding influence of the environment of the concrete construction part. The device also includes a measuring instrument, which measures the volume resistance of the sensor wires and an evaluating device, which can supply the measurement values of the measuring instrument either permanently and/or when called up, and which, evaluating from these values, draws conclusions on the depth-dependent corrosion state of the concrete construction part.

The invention discloses a longitudinal short rib feeding and distributing device and method used during welding of steel bar meshes, and belongs to the field of steel bar welding. A steel bar liftingdevice is arranged in a steel bar hopper, a chain conveying device is arranged behind the steel bar lifting device, a steel bar interval transfer device is arranged below the chain conveying device, the transfer end position of the steel bar interval transfer device is the steel bar distributing position of longitudinal steel bars, a plurality of steel bar lifting and supporting devices are arranged at the steel bar distributing position, and a plurality of longitudinal steel bar longitudinal carrying devices are movably arranged above the steel bar distributing position. By means of the longitudinal short rib feeding and distributing device and method, the installation height of the short steel bar hopper is reduced, alarms or shutdowns caused by improper arrangement in the short steel bar supply process are reduced, longitudinal transportation errors at the steel bar distributing position are reduced, the convenience of feeding is improved, and the production efficiency is improved.

The invention discloses a grout sleeve for connecting prefabricated member steel bars and a construction method of the grout sleeve, relating to the technical field of precast concrete members. The grout sleeve is used for solving the connection problem of prefabricated member steel bars and has the advantages of simplicity in construction, low cost, high strength and reliability in connection. The grout sleeve comprises a sleeve body, sealing rings and a set bolt, wherein the sleeve body is provided with a grout hole and a vent hole; the set bolt is arranged in the middle of the sleeve body; massive bulges are arranged on the inner wall of the sleeve body; the sealing rings are arranged at two ends in the sleeve body. When a prefabricated member is assembled, two reserved steel bars of the prefabricated member are inserted from two ends of the sleeve body, are fixed by the set bolt and squeeze into the elastic sealing rubber rings, then, a cement-based grouting material is filled from the grout hole, and the two reserved steel bars are connected to form a whole body through the sleeve. The grout sleeve can be used for connecting various prefabricated member steel bars.

The invention belongs to the technical field of buildings and particularly relates to a construction method of a structural system with structural floors as horizontal braces. The method comprises the steps that 1, an envelope structure, cement-mixed piles, engineering pile foundations, structure columns, first steel latticework columns, a supporting pile foundation, a supporting column and second steel latticework columns are constructed in a foundation pit; 2 and 3, earth is excavated to the bottom of first reinforced concrete inner supports, and the first reinforced concrete inner supports and first enclosing purlins are constructed; 4, the earth continues to be excavated downwards, and temporary supports or all floor structures and concrete inner supports are constructed; 5, the earth is excavated to a foundation slab, and a bedding layer, a bearing platform and the foundation slab are constructed; 6, the contained temporary supports are dismantled, and if the temporary supports are not contained, the next step is executed; 7, side walls of all the floor structures, earth outlet holes reserved in all the structural floors and a beam and slab structure on the top are constructed. According to the construction method, foundation engineering and upper structures are constructed at the same time, the construction time can be greatly shortened, the construction cost can be saved, and therefore the total cost of a project can be saved.

The invention discloses a method for the combination of a post-increasing steel beam and a concrete slab. Firstly, the location of a post-increasing steel beam (3) and a connecting steel plate (1) is determined on the bottom surface of a built concrete slab (4); secondly, a post-anchoring building anchor bolt (2) is anchored in the built concrete slab (4) at the location of the connecting steel plate (1); then the connecting steel plate (1) is fixed on the bottom surface of the built concrete slab (4) by the post-anchoring building anchor bolt (2); finally, the post-increasing steel beam (3) and the connecting steel plate (1) are connected. The invention uses the post-anchoring building anchor bolt for replacing the traditional shearing connecting piece, is used for bearing the vertical shearing force between the superimposing surfaces of the steel beam and the reinforced concrete slab, restricts the relative sliding of the steel beam and the reinforced concrete slab, causes the steel beam and the reinforced concrete slab to be combined into a whole and work reliably, and provides a simple and effective processing method for the technical transformation of the combination structure of the steel and the concrete.

Disclosed herewith a modular integrated building and a construction method thereof. The building includes multiple prefabricated room units, each provided with reserved, exposed reinforcing bars at its top. A bottom of a load-bearing structure of the prefabricated room unit is embedded with grouting couple shafts. Reinforcing bars of the load-bearing structure and of the prefabricated room unit of a next floor are inserted in inner grouting chambers of the grouting couple shafts to connect two prefabricated room units of adjacent floors together. A cast-in-situ concrete interlayer is arranged for connecting adjacent prefabricated room units of a same floor together. The on-site workload is reduced significantly, the construction period is shortened greatly, and the construction is convenient and rapid.

The invention relates to a device and a method for decreasing columns and reinforcing girders of reinforced concrete members, aiming to realize reinforcement of reinforced concrete girders and removal of columns while meeting requirements of room layout and use functions, and complete strengthening and reinforcing of the reinforced concrete girders by supporting action of the four-leg steel pipe struts rather than that of reinforced concrete columns. Particularly, two four-leg steel pipe struts are arranged on two sides of one reinforced concrete column, steel pipe top beams are supported to the bottoms of the reinforced concrete girders by jacks on the upper portions of the four-leg steel pipe struts, so that load of the reinforced concrete girders is transmitted, and the reinforced concrete columns are replaced. Further, the reinforced concrete columns are removed and formworks are mounted while concrete is poured, so that the purpose of reinforcing the reinforced concrete girders is achieved. The device is easy to manufacture, convenient to install, easy to operate and targeted highly, solves the difficulty in reinforcing the reinforced concrete walls and girders, and has high economic benefit and social benefit.

The present invention relates to a method for reinforcing reinforced concrete structure by externally riveting steel plate and its special-purpose rivet. The reinforcing steel plate strip can be riveted on the surface of the concrete member from exterior of the concrete member, and the described rivet is made into the form of that the half of the rivet head of said rivet is semicylindrical form, and another half of semiconical form, and the cross-section of said rivet body is rectangular, and the transition portions between four planes of rivet head and rivet body are made into the oblique surface structure.

The invention relates to a web-covering-base trapezoid (wave-shaped) steel plate combined box girder and a construction method thereof. The web-covering-base trapezoid (wave-shaped) steel plate combined box girder comprises a box girder composite baseplate, a box girder composite structure top plate, trapezoid steel webs and a box girder partition plate. The box girder composite baseplate with a composite structure is formed by pouring epoxy asphalt concrete onto a trapezoid steel plate. The box girder composite structure top plate is a combined structure of a trapezoid steel plate beam and reinforced concrete. Before erection of the box girder, the trapezoid steel plate, the trapezoid steel plate beam and the trapezoid steel webs are welded or connected in other ways to form an integral structural system. The web-covering-base trapezoid (wave-shaped) steel plate combined box girder and the construction method thereof have the advantages that longitudinal reinforcement binding and prestressing tendon pipeline laying of a prefabricated overall framework are completed, beam bodies or beam segment framework integral structures are hoisted and erected directly, and the reinforced concrete baseplate and the reinforced concrete top plate of the box girder are poured finally; baseplate concrete is flush with steel web flanges; the shape of a bridge is attractive, and construction is facilitated.

The invention discloses a building embedded part device for shaping, positioning and adjusting in the technical field of building construction. The building embedded part device for shaping, positioning and adjusting comprises an annular supporting part serving as a main body support and a positioning part used for limiting the position of a steel bar main reinforcement, wherein the annular supporting part can be rotationally driven through a screw rod piece, and the annular supporting part is translated; the positioning part comprises a sliding end, a telescopic end and a positioning end, and a clamping structure is installed on the positioning part. The building embedded part device can shape and position the steel bar main reinforcement of a building embedded part, the sliding end adjusts the position of the positioning part according to the arrangement modes of different steel bar main reinforcements, and the positioning part can adjust the angle position on the supporting part; before the steel bar main reinforcement is inserted into a wear-resistant sleeve, the steel bar main reinforcement can be rotated, finely adjusted and locked through a rotating sleeve, so that the steel bar main reinforcement can be quickly aligned and inserted, and a steel bar disc reinforcement can be quickly fixed to the strong-structure side of the steel bar main reinforcement through the clamping structure.

The invention relates to the technical field of prefabricated buildings, and discloses a fabricated wallboard with a positioning device and a mounting method thereof. The fabricated wallboard comprises a bottom layer wallboard; a reserved steel bar is fixedly installed in the middle of the bottom layer wallboard; the bottom end of the reserved steel bar is movably sleeved with a positioning steel plate; and butt joint channels are formed in the two sides of the inner side of the positioning steel plate. According to the fabricated wallboard with the positioning device and the mounting method thereof, by changing the structures of the positioning steel plate and the bottom end of an upper layer wallboard, utilizing a concave-convex butt joint mode, connecting metal convex strips with the butt joint channels in a sleeved mode and conducting adsorption alignment through magnets, the situation that the time consumed by butt joint between the wallboards is long is avoided, and the wallboard assembling efficiency is improved; a first magnetic ring and a second magnetic ring strongly adsorb the metal convex strips, so that the bottom end of the upper layer wallboard integrally keeps stable vertical falling; and the butt joint channels, the magnets and the reserved steel bar are located on the same horizontal line, so that the situation that a steel bar sleeve opening is accurately aligned with the reserved steel bar can be guaranteed, and the installation accident that the reserved steel bar is extruded and deformed due to misalignment is avoided.

The invention discloses an assembled prefabricated floor connecting system and a construction method of the assembled prefabricated floor connecting system. The construction method comprises the following steps of 1) binding floor reinforcing mesh sheets in a workshop, embedding a plurality of longitudinal stressed reinforcing bars on the reinforcing mesh sheets, and connecting longitudinal stressed reinforcing bars on the two reinforcing mesh sheets through a plurality of connecting reinforcing bars and sleeves; 2) pouring concrete of the reinforcing mesh sheets to form floors; 3) screwing out the sleeves to separate the interconnected floors, and transporting the floors to a construction site; 4) welding an anti-shear steel plate to a steel beam at a construction site; 5) enabling the connecting reinforcing bars to penetrate through the anti-shear steel plate, and connecting the two ends of the connecting reinforcing bars with the longitudinal stressed reinforcing bars on the two floors through the sleeves; 6) and pouring concrete at the joints of the floors and the steel beam. The floors are effectively connected at the joints, the stress performance of the connection positionsof the joints is guaranteed, meanwhile, the prefabricated floors are manufactured in batch in the workshop, the on-site hoisting and mechanical connection operations are convenient, the construction speed is high, and the production efficiency is improved.

The invention discloses a pitched roof assembly type communication machine room and belongs to the field of communication equipment. The pitched roof assembly type communication machine room comprises a reinforced concrete foundation, wall bodies and a roof, wherein embedded bolts are arranged in the reinforced concrete foundation, the wall bodies are fixedly connected to the reinforced concrete foundation through the embedded bolts, and the roof is fixed to the upper ends of the wall bodies through bolts; and the upper end of the reinforced concrete foundation is higher than the ground, one side of the reinforced concrete foundation is provided with steps from the ground to the upper surface of the reinforced concrete foundation, the top of the roof is a downwards tilted slope, and the steps are arranged at the side where the top of the roof is high. The pitched roof assembly type communication machine room is great in sealing and moisture resisting properties and is rapid and convenient to assemble.

The invention provides reinforcing mesh welding production equipment, and relates to the technical field of reinforcing mesh processing. The reinforcing mesh welding production equipment comprises a longitudinal bar straightening and conveying module, a transverse bar straightening and conveying module and a welding and shearing module, wherein the longitudinal bar straightening and conveying module is used for straightening two longitudinal bars and longitudinally conveying the two straightened longitudinal bars to the welding and shearing module; the transverse bar straightening and conveying module is used for straightening transverse bars and transversely conveying the straightened transverse bars to the welding and shearing module; and the welding and shearing module is used for shearing the transverse bars, welding the transverse bars between the two longitudinal bars to form a mesh and shearing the mesh. According to the reinforcing mesh welding production equipment provided bythe invention, the welding shearing module highly integrates three functions of mesh welding, transverse bar sizing shearing and mesh shearing, and is matched with the longitudinal bar straightening conveying module and the transverse bar straightening conveying module, so that automatic feeding of the longitudinal bars and the transverse bars is realized, finished meshes are processed, and the production efficiency of the reinforcing mesh for a PC component of a wallboard is improved.

The invention discloses a semiautomatic steel bar bender, which relates to the technical field of steel bar-bending equipment. The invention aims to provide the semiautomatic steel bar bender which can deal with steel bars with different bending radii. The technical scheme of the invention is as follows: the semiautomatic steel bar bender comprises a machine bed, a working plate which is connected with the machine bed is arranged on the top of the machine bed, a rotary disk is arranged at the center of the working plate, the rotary disk is connected with a power mechanism in the machine bed and can rotate around the axis of the rotary disk, a plurality of positioning shaft holes and clamping shaft holes are evenly distributed along the circumferential direction of the rotary disk on the rotary disk, the positioning shaft holes form a plurality of concentric circles on the rotary disk, positioning shafts and clamping shafts are respectively correspondingly placed in the positioning shaft holes and the clamping shaft holes, backing pin blocks and rollers are arranged on both sides of the working plate, and backing pins are arranged on the backing pin blocks. The invention is applicable to steel bar bender.