CN111561101A - Manufacturing method of light sandwich concrete steel bar truss girder - Google Patents

Manufacturing method of light sandwich concrete steel bar truss girder Download PDF

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Publication number
CN111561101A
CN111561101A CN201910116133.8A CN201910116133A CN111561101A CN 111561101 A CN111561101 A CN 111561101A CN 201910116133 A CN201910116133 A CN 201910116133A CN 111561101 A CN111561101 A CN 111561101A
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CN
China
Prior art keywords
steel bar
web member
girder
steel
manufacturing
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Pending
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CN201910116133.8A
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Chinese (zh)
Inventor
姜龙
苏志刚
景恒勇
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Henan Tianjiu Assembly Building Co ltd
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Henan Tianjiu Assembly Building Co ltd
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Priority to CN201910116133.8A priority Critical patent/CN111561101A/en
Publication of CN111561101A publication Critical patent/CN111561101A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B28WORKING CEMENT, CLAY, OR STONE
    • B28BSHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/92Protection against other undesired influences or dangers
    • E04B1/94Protection against other undesired influences or dangers against fire
    • E04B1/941Building elements specially adapted therefor
    • E04B1/943Building elements specially adapted therefor elongated
    • E04B1/944Building elements specially adapted therefor elongated covered with fire-proofing material
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065Light-weight girders, e.g. with precast parts

Abstract

The invention discloses a method for manufacturing a light sandwich concrete steel bar truss girder, belonging to the technical field of building engineering; the problem of the insulation construction and the anticorrosion structure of light sandwich concrete reinforced bar truss girder do not cut apart in the light sandwich concrete reinforced bar truss girder manufacture process that has now is solved, its technical characterstic is: the light sandwich concrete steel bar truss girder manufactured by the invention has smooth and smooth inner and outer surfaces, high flatness and simple construction method, prolongs the service life of a building while ensuring the structure and the building safety, can be produced in a factory, and then is transported to a site for assembly, thereby being very suitable for an assembly type building.

Description

Manufacturing method of light sandwich concrete steel bar truss girder
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a method for manufacturing a light sandwich concrete reinforced bar truss girder.
Background
The building engineering is an engineering entity formed by the construction of various house buildings and auxiliary facilities thereof and the installation activities of lines, pipelines and equipment matched with the house buildings, wherein the house buildings comprise top covers, beam columns, walls and foundations, and can form internal spaces, so that the engineering required by production, living, learning and public activities of people is met, and sandwich concrete is required to be used in the construction process of the building engineering and has the advantages of simple manufacture and low cost.
Reinforced concrete refers to a composite material formed by adding reinforcing mesh, steel plates or fibers to concrete, and is one of the most common forms of reinforced concrete; in the construction of reinforced concrete, workers need to manufacture the steel bar truss girder in advance, so that the time for binding steel bars is saved, and the steel bar truss girder has higher rigidity, and is mostly used for super high-rise buildings because the steel bar truss girder is wrapped outside the concrete and the tensile stress is maximum; in the existing manufacturing process of the light sandwich concrete reinforced truss girder, a heat insulation structure and an anticorrosion structure of the light sandwich concrete reinforced truss girder are not separated, so that the service life of the light sandwich concrete reinforced truss girder is shortened, and therefore, the manufacturing method of the light sandwich concrete reinforced truss girder is provided.
Disclosure of Invention
The invention aims to provide a method for manufacturing a light sandwich concrete reinforced bar truss beam, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for manufacturing a light sandwich concrete steel bar truss girder comprises the following steps:
s1, manufacturing parts of the light sandwich concrete steel bar truss girder, firstly manufacturing angle steel of a corner connecting node of the steel bar truss girder, firstly marking, cutting and blanking the selected angle steel along the length direction of the angle steel when manufacturing the angle steel of the connecting node, polishing and grinding burrs, and finally welding position lines of main steel bars of the stone beam corner and web member steel bars on the angle steel of the connecting node, wherein when the steel bars are subjected to double-side welding, the lap joint length is 5 times of the diameter of the steel bars;
s2, manufacturing a main reinforcing steel bar of a beam corner of the steel bar truss, a reinforcing steel bar of a straight web member and a reinforcing steel bar of an oblique web member, scribing the selected main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member along the length direction of the steel bars by using a pencil when manufacturing the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member, cutting, blanking, polishing and grinding burrs, wherein the lapping length is 5 times of the diameter of the steel bars when the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member are made of the same material as the connecting node steel bar, and the lapping length is connected by;
s3, performing assembly welding on parts, drawing the position line of the beam corner connecting node angle steel of the beam surface on a preset assembly welding steel platform by using a pen according to the proportion of 1:1, then placing beam corner main steel bars, straight web members and diagonal web member steel bars on the corresponding position line of the beam corner connecting node angle steel, and performing welding after checking and correcting by using a measuring tool;
s4, welding embedded internal thread sleeves with the diameter of 18mm and the length of 100mm on a lifting point of the beam and a reinforcement framework, installing two embedded internal thread sleeves on each surface of each end, cleaning welding slag, screwing lifting bolts into the embedded internal thread sleeves after repair welding inspection, and simultaneously screwing steel bar straight threads at two ends of the light sandwich concrete reinforcement truss beam into the steel bar straight thread sleeves and wrapping adhesive tapes for protection treatment;
s5, horizontally placing the steel reinforcement framework of the manufactured light sandwich concrete reinforced truss girder into a light concrete pouring mold prepared in advance, fixing, pouring light concrete after checking, vibrating by using a vibrating rod with the diameter of 60mm while pouring in the pouring process until the required height is reached, and pushing the light concrete pouring mold into a concrete steam curing box for curing after standing;
s6, horizontally placing the steamed and cured lightweight sandwich concrete steel bar truss girder into a fireproof protection layer spraying frame mold after demolding and fixing, and then spraying a fireproof protection layer, wherein the fireproof protection layer is sprayed on the exterior of the lightweight sandwich concrete steel bar truss girder, the thickness of the fireproof protection layer is 50mm, the fireproof protection layer is an environment-friendly non-combustible cement fireproof paint, when the fireproof protection layer is manufactured, each layer of fireproof protection layer is compacted, pressed flat and polished after being manufactured, and the next layer of fireproof protection layer is sprayed after being dried after each layer is spaced for more than 8 hours;
s7, finally, placing the light sandwich concrete reinforced truss girder coated with the fireproof protective layer into a prepared girder surface spraying coating layer framework mould and fixing, then spraying the outermost girder surface coating layer, wherein the thickness of the girder surface coating layer is 10mm, the girder surface coating layer adopts an environment-friendly non-combustible cement-based concrete reinforcing agent, the girder surface coating layer is constructed in two layers, each layer of girder surface coating layer is compacted, pressed and smoothed and polished after being manufactured, and each layer of girder surface coating layer is dried after being spaced for more than 8 hours;
s8, after the beam surface wrapping layer die is removed, whether the beam surface and the beam corner are defective or not is checked, and the completeness of the hoisting hole and the straight thread of the steel bar is checked.
As a further scheme of the invention: in step S1, the corner connection node angle steel has a thickness greater than 4 mm.
As a still further scheme of the invention: in step S6, the thickness of each fireproof protection layer is less than 10mm, and 5 fireproof protection layers are manufactured.
Compared with the prior art, the invention has the beneficial effects that: the light sandwich concrete steel bar truss girder manufactured by the invention has the advantages of firm and durable structure, heat preservation, environmental protection, energy conservation, easy manufacture, low cost, flat and smooth inner and outer surfaces, high flatness and simple construction method.
Detailed Description
The technical solutions of the present invention will be described in further detail with reference to specific embodiments, and it should be apparent that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A method for manufacturing a light sandwich concrete steel bar truss girder comprises the following steps:
s1, manufacturing parts of the light sandwich concrete steel bar truss girder, firstly manufacturing angle steel of a corner connecting node of the steel bar truss girder, firstly scribing, cutting and blanking the selected angle steel along the length direction of the angle steel when manufacturing the angle steel of the connecting node, polishing and grinding burrs, and finally using a line on the angle steel of the connecting node to form a welding position line of a main steel bar of a girder corner and a web member steel bar, wherein the thickness of the angle steel of the corner connecting node is 7mm, and when the steel bar is subjected to double-side welding, the lap joint length is 5 times of the diameter of the steel bar;
s2, manufacturing a main reinforcing steel bar of a beam corner of the steel bar truss, a reinforcing steel bar of a straight web member and a reinforcing steel bar of an oblique web member, scribing the selected main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member along the length direction of the steel bars by using a pencil when manufacturing the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member, cutting, blanking, polishing and grinding burrs, wherein the lapping length is 5 times of the diameter of the steel bars when the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member are made of the same material as the connecting node steel bar, and the lapping length is connected by;
s3, performing assembly welding on parts, drawing the position line of the beam corner connecting node angle steel of the beam surface on a preset assembly welding steel platform by using a pen according to the proportion of 1:1, then placing beam corner main steel bars, straight web members and diagonal web member steel bars on the corresponding position line of the beam corner connecting node angle steel, and performing welding after checking and correcting by using a measuring tool;
s4, welding embedded internal thread sleeves with the diameter of 18mm and the length of 100mm on a lifting point of the beam and a reinforcement framework, installing two embedded internal thread sleeves on each surface of each end, cleaning welding slag, screwing lifting bolts into the embedded internal thread sleeves after repair welding inspection, and simultaneously screwing steel bar straight threads at two ends of the light sandwich concrete reinforcement truss beam into the steel bar straight thread sleeves and wrapping adhesive tapes for protection treatment;
s5, horizontally placing the steel reinforcement framework of the manufactured light sandwich concrete reinforced truss girder into a light concrete pouring mold prepared in advance, fixing, pouring light concrete after checking, vibrating by using a vibrating rod with the diameter of 60mm while pouring in the pouring process until the required height is reached, and pushing the light concrete pouring mold into a concrete steam curing box for curing after standing;
s6, horizontally placing the steamed and cured lightweight sandwich concrete steel bar truss girder into a fireproof protection layer spraying frame mold after demolding and fixing, and then spraying a fireproof protection layer, wherein the fireproof protection layer is sprayed on the exterior of the lightweight sandwich concrete steel bar truss girder, the thickness of the fireproof protection layer is 60mm, the fireproof protection layer is an environment-friendly non-combustible cement fireproof paint, when the fireproof protection layer is manufactured, the thickness of each fireproof protection layer is 12mm, 5 layers of fireproof protection layers are manufactured, each layer of fireproof protection layer is compacted, flattened and polished after being manufactured, and the next layer of fireproof protection layer is sprayed after being dried at intervals of 9 hours;
s7, finally, placing the light sandwich concrete reinforced truss girder coated with the fireproof protection layer into a prepared girder surface spraying coating layer framework mould and fixing, then spraying the outermost layer girder surface coating layer, wherein the thickness of the girder surface coating layer is 10mm, the girder surface coating layer adopts an environment-friendly non-combustible cement-based concrete reinforcing agent, the girder surface coating layer is constructed in two layers, each layer of girder surface coating layer is compacted, pressed and smoothed and polished after being manufactured, and each layer is dried after being spaced for 9 hours;
s8, after the beam surface wrapping layer die is removed, whether the beam surface and the beam corner are defective or not is checked, and the completeness of the hoisting hole and the straight thread of the steel bar is checked.
Example 2
A method for manufacturing a light sandwich concrete steel bar truss girder comprises the following steps:
s1, manufacturing parts of the light sandwich concrete steel bar truss girder, firstly manufacturing angle steel of a corner connecting node of the steel bar truss girder, firstly scribing, cutting and blanking the selected angle steel along the length direction of the angle steel when manufacturing the angle steel of the connecting node, polishing and grinding burrs, and finally using a line on the angle steel of the connecting node to form a welding position line of a main steel bar of a girder corner and a web member steel bar, wherein the thickness of the angle steel of the corner connecting node is 8mm, and when the steel bar is subjected to double-side welding, the lap joint length is 5 times of the diameter of the steel bar;
s2, manufacturing a main reinforcing steel bar of a beam corner of the steel bar truss, a reinforcing steel bar of a straight web member and a reinforcing steel bar of an oblique web member, scribing the selected main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member along the length direction of the steel bars by using a pencil when manufacturing the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member, cutting, blanking, polishing and grinding burrs, wherein the lapping length is 5 times of the diameter of the steel bars when the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member are made of the same material as the connecting node steel bar, and the lapping length is connected by;
s3, performing assembly welding on parts, drawing the position line of the beam corner connecting node angle steel of the beam surface on a preset assembly welding steel platform by using a pen according to the proportion of 1:1, then placing beam corner main steel bars, straight web members and diagonal web member steel bars on the corresponding position line of the beam corner connecting node angle steel, and performing welding after checking and correcting by using a measuring tool;
s4, welding embedded internal thread sleeves with the diameter of 18mm and the length of 100mm on a lifting point of the beam and a reinforcement framework, installing two embedded internal thread sleeves on each surface of each end, cleaning welding slag, screwing lifting bolts into the embedded internal thread sleeves after repair welding inspection, and simultaneously screwing steel bar straight threads at two ends of the light sandwich concrete reinforcement truss beam into the steel bar straight thread sleeves and wrapping adhesive tapes for protection treatment;
s5, horizontally placing the steel reinforcement framework of the manufactured light sandwich concrete reinforced truss girder into a light concrete pouring mold prepared in advance, fixing, pouring light concrete after checking, vibrating by using a vibrating rod with the diameter of 60mm while pouring in the pouring process until the required height is reached, and pushing the light concrete pouring mold into a concrete steam curing box for curing after standing;
s6, horizontally placing the steamed and cured lightweight sandwich concrete steel bar truss girder into a fireproof protection layer spraying frame mold after demolding and fixing, and then spraying a fireproof protection layer, wherein the fireproof protection layer is sprayed on the exterior of the lightweight sandwich concrete steel bar truss girder, the thickness of the fireproof protection layer is 55mm, the fireproof protection layer is an environment-friendly non-combustible cement fireproof paint, when the fireproof protection layer is manufactured, the thickness of each fireproof protection layer is 11mm, 5 fireproof protection layers are manufactured, after the fireproof protection layers are manufactured, the fireproof protection layers are compacted, flattened and polished, and after each fireproof protection layer is dried at intervals of 10 hours, the spraying work of the next layer is performed;
s7, finally, placing the light sandwich concrete reinforced truss girder coated with the fireproof protection layer into a prepared girder surface spraying coating layer framework mould and fixing, then spraying the outermost layer girder surface coating layer, wherein the thickness of the girder surface coating layer is 10mm, the girder surface coating layer adopts an environment-friendly non-combustible cement-based concrete reinforcing agent, the girder surface coating layer is constructed in two layers, each layer of girder surface coating layer is compacted, pressed and smoothed and polished after being manufactured, and each layer is dried after being spaced for 10 hours;
s8, after the beam surface wrapping layer die is removed, whether the beam surface and the beam corner are defective or not is checked, and the completeness of the hoisting hole and the straight thread of the steel bar is checked.
Example 3
A method for manufacturing a light sandwich concrete steel bar truss girder comprises the following steps:
s1, manufacturing parts of the light sandwich concrete steel bar truss girder, firstly manufacturing angle steel of a corner connecting node of the steel bar truss girder, firstly scribing, cutting and blanking the selected angle steel along the length direction of the angle steel when manufacturing the angle steel of the connecting node, polishing and grinding burrs, and finally using a line on the angle steel of the connecting node to form a welding position line of a main steel bar of a girder corner and a web member steel bar, wherein the thickness of the angle steel of the corner connecting node is 9mm, and when the steel bar is subjected to double-side welding, the lap joint length is 5 times of the diameter of the steel bar;
s2, manufacturing a main reinforcing steel bar of a beam corner of the steel bar truss, a reinforcing steel bar of a straight web member and a reinforcing steel bar of an oblique web member, scribing the selected main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member along the length direction of the steel bars by using a pencil when manufacturing the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member, cutting, blanking, polishing and grinding burrs, wherein the lapping length is 5 times of the diameter of the steel bars when the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member are made of the same material as the connecting node steel bar, and the lapping length is connected by;
s3, performing assembly welding on parts, drawing the position line of the beam corner connecting node angle steel of the beam surface on a preset assembly welding steel platform by using a pen according to the proportion of 1:1, then placing beam corner main steel bars, straight web members and diagonal web member steel bars on the corresponding position line of the beam corner connecting node angle steel, and performing welding after checking and correcting by using a measuring tool;
s4, welding embedded internal thread sleeves with the diameter of 18mm and the length of 100mm on a lifting point of the beam and a reinforcement framework, installing two embedded internal thread sleeves on each surface of each end, cleaning welding slag, screwing lifting bolts into the embedded internal thread sleeves after repair welding inspection, and simultaneously screwing steel bar straight threads at two ends of the light sandwich concrete reinforcement truss beam into the steel bar straight thread sleeves and wrapping adhesive tapes for protection treatment;
s5, horizontally placing the steel reinforcement framework of the manufactured light sandwich concrete reinforced truss girder into a light concrete pouring mold prepared in advance, fixing, pouring light concrete after checking, vibrating by using a vibrating rod with the diameter of 60mm while pouring in the pouring process until the required height is reached, and pushing the light concrete pouring mold into a concrete steam curing box for curing after standing;
s6, horizontally placing the steamed and cured lightweight sandwich concrete steel bar truss girder into a fireproof protection layer spraying frame mold after demolding and fixing, and then spraying a fireproof protection layer, wherein the fireproof protection layer is sprayed on the exterior of the lightweight sandwich concrete steel bar truss girder, the thickness of the fireproof protection layer is 65mm, the fireproof protection layer is an environment-friendly non-combustible cement fireproof paint, when the fireproof protection layer is manufactured, the thickness of each fireproof protection layer is 13mm, 5 fireproof protection layers are manufactured, after the fireproof protection layers are manufactured, the fireproof protection layers are compacted, flattened and polished, and after 15h drying treatment is carried out on each layer, the spraying work of the next layer is carried out;
s7, finally, placing the light sandwich concrete reinforced truss girder coated with the fireproof protective layer into a prepared girder surface spraying coating layer framework mould and fixing, then spraying the outermost layer girder surface coating layer, wherein the thickness of the girder surface coating layer is 10mm, the girder surface coating layer adopts an environment-friendly non-combustible cement-based concrete reinforcing agent, the girder surface coating layer is constructed in two layers, each layer of girder surface coating layer is compacted, pressed and smoothed and polished after being manufactured, and each layer is dried after being spaced for 13 hours;
s8, after the beam surface wrapping layer die is removed, whether the beam surface and the beam corner are defective or not is checked, and the completeness of the hoisting hole and the straight thread of the steel bar is checked.
Example 4
A method for manufacturing a light sandwich concrete steel bar truss girder comprises the following steps:
s1, manufacturing parts of the light sandwich concrete steel bar truss girder, firstly manufacturing angle steel of a corner connecting node of the steel bar truss girder, firstly marking, cutting and blanking the selected angle steel along the length direction of the angle steel when manufacturing the angle steel of the connecting node, polishing and grinding burrs, and finally using a line on the angle steel of the connecting node to form a welding position line of a main steel bar of a girder corner and a web member steel bar, wherein the thickness of the angle steel of the corner connecting node is 13mm, and when the steel bar is subjected to double-side welding, the lap joint length is 5 times of the diameter of the steel bar;
s2, manufacturing a main reinforcing steel bar of a beam corner of the steel bar truss, a reinforcing steel bar of a straight web member and a reinforcing steel bar of an oblique web member, scribing the selected main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member along the length direction of the steel bars by using a pencil when manufacturing the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member, cutting, blanking, polishing and grinding burrs, wherein the lapping length is 5 times of the diameter of the steel bars when the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member are made of the same material as the connecting node steel bar, and the lapping length is connected by;
s3, performing assembly welding on parts, drawing the position line of the beam corner connecting node angle steel of the beam surface on a preset assembly welding steel platform by using a pen according to the proportion of 1:1, then placing beam corner main steel bars, straight web members and diagonal web member steel bars on the corresponding position line of the beam corner connecting node angle steel, and performing welding after checking and correcting by using a measuring tool;
s4, welding embedded internal thread sleeves with the diameter of 18mm and the length of 100mm on a lifting point of the beam and a reinforcement framework, installing two embedded internal thread sleeves on each surface of each end, cleaning welding slag, screwing lifting bolts into the embedded internal thread sleeves after repair welding inspection, and simultaneously screwing steel bar straight threads at two ends of the light sandwich concrete reinforcement truss beam into the steel bar straight thread sleeves and wrapping adhesive tapes for protection treatment;
s5, horizontally placing the steel reinforcement framework of the manufactured light sandwich concrete reinforced truss girder into a light concrete pouring mold prepared in advance, fixing, pouring light concrete after checking, vibrating by using a vibrating rod with the diameter of 60mm while pouring in the pouring process until the required height is reached, and pushing the light concrete pouring mold into a concrete steam curing box for curing after standing;
s6, horizontally placing the steamed and cured lightweight sandwich concrete steel bar truss girder into a fireproof protection layer spraying frame mold after demolding and fixing, and then spraying a fireproof protection layer, wherein the fireproof protection layer is sprayed on the exterior of the lightweight sandwich concrete steel bar truss girder, the thickness of the fireproof protection layer is 70mm, the fireproof protection layer is an environment-friendly non-combustible cement fireproof paint, when the fireproof protection layer is manufactured, the thickness of each fireproof protection layer is 14mm, 5 layers of fireproof protection layers are manufactured, each layer of fireproof protection layer is compacted, flattened and polished after being manufactured, and the next layer of fireproof protection layer is sprayed after being dried at intervals of 18 h;
s7, finally, placing the light sandwich concrete reinforced truss girder coated with the fireproof protective layer into a prepared girder surface spraying coating layer framework mould and fixing, then spraying the outermost layer girder surface coating layer, wherein the thickness of the girder surface coating layer is 10mm, the girder surface coating layer adopts an environment-friendly non-combustible cement-based concrete reinforcing agent, the girder surface coating layer is constructed in two layers, each layer of girder surface coating layer is compacted, pressed and smoothed and polished after being manufactured, and each layer is dried after being spaced for 18 hours;
s8, after the beam surface wrapping layer die is removed, whether the beam surface and the beam corner are defective or not is checked, and the completeness of the hoisting hole and the straight thread of the steel bar is checked.
The invention has the beneficial effects that: the light sandwich concrete steel bar truss girder manufactured by the invention has the advantages of firm and durable structure, heat preservation, environmental protection, energy conservation, easy manufacture, low cost, flat and smooth inner and outer surfaces, high flatness and simple construction method.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (7)

1. A manufacturing method of a light sandwich concrete steel bar truss girder is characterized by comprising the following steps:
s1, manufacturing parts of the light sandwich concrete steel bar truss girder, firstly manufacturing angle steel of a corner connecting node of the steel bar truss girder, firstly marking, cutting and blanking the selected angle steel along the length direction of the angle steel when manufacturing the angle steel of the connecting node, polishing and grinding burrs, and finally welding position lines of main steel bars of the stone beam corner and web member steel bars on the angle steel of the connecting node, wherein when the steel bars are subjected to double-side welding, the lap joint length is 5 times of the diameter of the steel bars;
s2, manufacturing a main reinforcing steel bar of a beam corner of the steel bar truss, a reinforcing steel bar of a straight web member and a reinforcing steel bar of an oblique web member, scribing the selected main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member along the length direction of the steel bars by using a pencil when manufacturing the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member, cutting, blanking, polishing and grinding burrs, wherein the lapping length is 5 times of the diameter of the steel bars when the main reinforcing steel bar of the beam corner, the selected reinforcing steel bar of the straight web member and the selected reinforcing steel bar of the oblique web member are made of the same material as the connecting node steel bar, and the lapping length is connected by;
s3, performing assembly welding on parts, drawing the position line of the beam corner connecting node angle steel of the beam surface on a preset assembly welding steel platform by using a pen according to the proportion of 1:1, then placing beam corner main steel bars, straight web members and diagonal web member steel bars on the corresponding position line of the beam corner connecting node angle steel, and performing welding after checking and correcting by using a measuring tool;
s4, welding embedded internal thread sleeves on the lifting points of the beams and the steel bar framework, installing two embedded internal thread sleeves on each surface of each end, cleaning welding slag, screwing hoisting bolts into the embedded internal thread sleeves after repair welding inspection, and simultaneously screwing steel bar straight threads at two ends of the light sandwich concrete steel bar truss beam into the steel bar straight thread sleeves and wrapping adhesive tapes for protection treatment;
s5, horizontally placing the steel reinforcement framework of the manufactured light sandwich concrete reinforced truss girder into a light concrete pouring mold prepared in advance, fixing, pouring light concrete after checking, vibrating by using a vibrating rod with the diameter of 60mm while pouring in the pouring process until the required height is reached, and pushing the light concrete pouring mold into a concrete steam curing box for curing after standing;
s6, horizontally placing the steamed lightweight sandwich concrete steel bar truss girder into a fireproof protection layer spraying frame mold after demolding and fixing, then spraying a fireproof protection layer, spraying the fireproof protection layer on the exterior of the lightweight sandwich concrete steel bar truss girder, wherein the fireproof protection layer is an environment-friendly non-combustible cement fireproof coating, compacting, flattening and polishing after each fireproof protection layer is manufactured, and drying after each fireproof protection layer is spaced for more than 8 hours and then spraying the next fireproof protection layer;
s7, finally, placing the light sandwich concrete reinforced truss girder coated with the fireproof protective layer into a prepared girder surface spraying and coating layer framework mould and fixing, then spraying the outermost girder surface coating layer, wherein the thickness of the girder surface coating layer is 10mm, the girder surface coating layer is constructed in two layers, and each layer of girder surface coating layer is compacted, pressed flatly and smeared;
s8, after the beam surface wrapping layer die is removed, whether the beam surface and the beam corner are defective or not is checked, and the completeness of the hoisting hole and the straight thread of the steel bar is checked.
2. The method of claim 1, wherein in step S1, the angle steel of the corner connecting node is greater than 4mm thick.
3. The method of manufacturing a lightweight sandwich concrete reinforced truss beam as claimed in claim 2, wherein in step S4, the diameter of the pre-embedded internal thread bushing is 18mm, and the length is 100 mm.
4. The method as claimed in claim 3, wherein the thickness of the fireproof protective layer is 50mm in step S6.
5. The method as claimed in claim 4, wherein in step S6, the thickness of each fireproof protective layer is less than 10mm, and the fireproof protective layers are formed into 5 layers.
6. The method for manufacturing a lightweight sandwich concrete reinforced truss beam as claimed in any one of claims 1 to 5, wherein in step S7, the beam surface coating layer is made of an environment-friendly non-combustible cement-based concrete reinforcing agent.
7. The method as claimed in claim 6, wherein in step S7, the space between the wrapping layers of each beam surface is more than 8h, and then the beam surface is dried.
CN201910116133.8A 2019-02-13 2019-02-13 Manufacturing method of light sandwich concrete steel bar truss girder Pending CN111561101A (en)

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JP2000355909A (en) * 1999-06-16 2000-12-26 Kondo Kozai Kk Construction method for bridge floor
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