CN113356479B - Concrete column framework and construction method thereof - Google Patents
Concrete column framework and construction method thereof Download PDFInfo
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- CN113356479B CN113356479B CN202110565542.3A CN202110565542A CN113356479B CN 113356479 B CN113356479 B CN 113356479B CN 202110565542 A CN202110565542 A CN 202110565542A CN 113356479 B CN113356479 B CN 113356479B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0604—Prismatic or cylindrical reinforcement cages composed of longitudinal bars and open or closed stirrup rods
- E04C5/0618—Closed cages with spiral- or coil-shaped stirrup rod
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/30—Columns; Pillars; Struts
- E04C3/34—Columns; Pillars; Struts of concrete other stone-like material, with or without permanent form elements, with or without internal or external reinforcement, e.g. metal coverings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/07—Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups
- E04C5/162—Connectors or means for connecting parts for reinforcements
- E04C5/166—Connectors or means for connecting parts for reinforcements the reinforcements running in different directions
- E04C5/167—Connection by means of clips or other resilient elements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The application provides a concrete column framework and a construction method thereof. The longitudinal ribs are made by covering an FRP layer outside a steel bar inner core, and the plurality of longitudinal ribs are arranged in a polygonal prism shape. The end face support is arranged at two ends of the longitudinal ribs, the end face support is composed of a plurality of supporting rods which are connected with each other and intersected with the central shaft of the polygonal prism, and two ends of each supporting rod are fixedly connected with the longitudinal ribs at two opposite positions respectively. The stainless steel stranded wires are spirally arranged along the peripheries of the longitudinal ribs. The connecting assembly is arranged at the joint of the stainless steel strand and the longitudinal rib and is used for fixedly connecting the stainless steel strand and the longitudinal rib. The concrete column skeleton in this application has advantages such as corrosion-resistant, intensity height, construction flexibility.
Description
Technical Field
The application relates to the technical field of building structural members, in particular to a concrete column framework.
Background
The performance degradation and even destruction of the concrete structure caused by the corrosion of the steel reinforcement framework inside the concrete column become a problem seriously threatening the structural safety and the development of social economy. The corrosion of the steel bars in the concrete has the characteristics of universality, concealment, progressiveness, paroxysmality and the like, not only consumes resources and pollutes the environment, but also easily induces engineering accidents to endanger the health and the safety of human beings.
In solving the problems of corrosion and durability of a concrete structure, the corrosion problem is solved most effectively from the perspective of the material. Fiber Reinforced composite materials (Fiber Reinforced Polymer, abbreviated as FRP) have the advantages of light weight, high strength, corrosion resistance, etc., have been widely used in the fields of building construction and structural reinforcement, and have become important materials for solving the problem of structural durability caused by corrosion of steel bars. However, when the FRP rib is used as a stirrup, bending and molding must be performed before the resin is cured, which greatly reduces the construction flexibility, and the strength of the bending section is only about 40% of the tensile strength of the material, which makes it difficult to ensure the overall strength of the framework. Therefore, a concrete column framework is needed at present, and has the advantages of corrosion resistance, high strength and the like compared with a framework of a common reinforcing steel bar, and has the advantage of construction flexibility compared with a framework of an FRP reinforcing steel bar.
Disclosure of Invention
The application provides a concrete column skeleton to solve corrosion, durability, construction flexibility scheduling problem of concrete column's steel reinforcement skeleton among the prior art.
In order to solve the above problems, the technical scheme provided by the application is as follows: a concrete column framework comprises longitudinal ribs, an end face support, stainless steel stranded wires and a connecting assembly. The longitudinal ribs are made of an FRP layer coated outside a steel bar inner core, and the longitudinal ribs are arranged in a polygonal prism shape. The end face support is arranged at two ends of the longitudinal ribs, the end face support is composed of a plurality of supporting rods which are connected with each other and intersected with the central shaft of the polygonal prism, and two ends of each supporting rod are fixedly connected with the longitudinal ribs at two opposite positions respectively. The stainless steel stranded wire is spirally arranged along the peripheries of the longitudinal ribs. The connecting assembly is arranged at the joint of the stainless steel strand and the longitudinal rib and is used for fixedly connecting the stainless steel strand and the longitudinal rib.
According to the concrete column framework, the longitudinal ribs are made of the FRP layers coated outside the steel bar inner cores, and the FRP materials have good corrosion resistance, high specific strength, good fatigue resistance and the like, so that the corrosion resistance of the longitudinal ribs is remarkably improved compared with that of the traditional common steel bars; the end face support is composed of a plurality of supporting rods which are intersected at the central shaft of the polygonal prism, and two ends of each supporting rod are respectively and fixedly connected with two longitudinal ribs at opposite positions, so that the formed framework can effectively restrain the stress deformation of concrete, and the bearing capacity of the column component is greatly improved; the stainless steel stranded wire is used as a substitute material of the traditional stirrup, so that the corrosion resistance of the framework is further enhanced, and compared with the defects of poor construction flexibility and low bending section strength when the FRP reinforcement material is used as the stirrup, the stainless steel stranded wire does not need the step of bending and curing, the construction flexibility is high when the stainless steel stranded wire is used in combination with the connecting component, and the stainless steel stranded wire is made of a flexible material, so that the tensile strength of a bending part is not weakened along with the change of shape; the stainless steel stranded wire of the fixed spiral of coupling assembling is used, the position of the regulation fixed point that can be convenient and fast and the interval of spiral stainless steel stranded wire from this further improvement construction flexibility.
In one possible embodiment, the end face support is also arranged in the middle of the longitudinal ribs.
In one possible design, the support rod includes a first rod and a second rod; the two ends of the first rod are respectively in threaded connection with the second rod, and the length of the supporting rod is adjusted by screwing the second rod.
In one possible embodiment, the first lever and/or the second lever are provided with a scale.
In a possible design, the end of the second rod is rotatably connected with a fastener, and the fastener is internally penetrated and fixed with the longitudinal rib.
In one possible embodiment, the end of the second rod is connected to the fastening element by a rotary connection; the rotary structure comprises an accommodating groove and a round cake in sliding connection with the groove wall of the accommodating groove, the round cake is arranged on one of the end part of the second rod and the fastening piece, and the accommodating groove is formed in the other of the end part of the second rod and the fastening piece.
In a possible design mode, a series connection hole is formed in the middle of the supporting rod, and the supporting rods can be fixedly connected through the bolt assembly and the series connection hole.
In one possible design, the connecting assembly comprises a fixedly connected binding belt and a hoop assembly; the ribbon with vertical muscle is connected, staple bolt subassembly with stainless steel strand wires are connected.
On the other hand, the technical scheme provided by the application is as follows: a construction method of a concrete column framework comprises the following steps:
determining the number of longitudinal ribs and the number of support rods on an end face support according to design conditions, and fixedly connecting the support rods with the longitudinal ribs so as to connect the longitudinal ribs with each other through the end face support;
arranging connecting components at corresponding positions of the longitudinal ribs according to the design spacing of the stainless steel stranded wires;
one end of the stainless steel stranded wire is fixedly connected to the end part of any longitudinal rib, and then the stainless steel stranded wire is spirally arranged in the height direction of the framework according to the designed interval and is movably pre-connected with the connecting assembly at the corresponding position;
after the stainless steel stranded wire is arranged, prestress is applied to the other end of the stainless steel stranded wire, the stainless steel stranded wire is made to be tightly stretched on the outer surfaces of the longitudinal ribs, then the connecting assembly is fastened, the longitudinal ribs and the stainless steel stranded wire are made to be fixed at each contact point, and therefore the stainless steel stranded wire is made to be in a plurality of the outer surfaces of the longitudinal ribs are always in a tensioned state, and finally a complete framework is formed.
The construction method of the concrete column framework has the remarkable practical advantages of being fast and convenient to construct, high in adaptability, economical and the like, can be widely applied to the civil engineering industry, and can improve the construction process and efficiency of the civil engineering at present.
In a possible design, when prestress is applied to the other end of the stainless steel stranded wire, if the longitudinal rib is deformed inwards due to the inward hoop force of the stainless steel stranded wire, the end face support is added at the deformed position, and the support rod is fixedly connected with the longitudinal rib.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic view of a concrete column skeleton according to an embodiment of the present invention;
FIG. 2 is a schematic view of an end bracket according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a second shank and fastener provided in accordance with one embodiment of the present invention;
FIG. 4 is a schematic view of a connecting assembly according to an embodiment of the present invention;
FIG. 5 is an enlarged view at A in FIG. 1;
FIG. 6 is a schematic view of the starting end of the spiral arrangement of the stainless steel strand according to one embodiment of the present invention;
fig. 7 is a schematic view of a concrete column framework in construction according to an embodiment of the present invention.
Reference numerals: 10. longitudinal ribs; 20. an end face bracket; 21. a support bar; 211. a first lever; 212. a second lever; 2121. a containing groove; 30. stainless steel stranded wires; 40. a connecting assembly; 41. binding a belt; 42. the hoop component; 50. a fastener; 51. a cake; 60. an aluminum collet; 70. a chest expander.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but 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 application.
In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description of the present application, it is to be understood that the terms "inner," "outer," "upper," "bottom," "front," "back," and the like, when used in the orientation or positional relationship indicated in FIG. 1, are used solely for the purpose of facilitating a description of the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
It should be noted that the same reference numerals are used to denote the same components or parts in the embodiments of the present application, and for the same parts in the embodiments of the present application, only one of the parts or parts may be given the reference numeral, and it should be understood that the reference numerals are also applicable to the other same parts or parts.
The deterioration and even destruction of concrete structure performance caused by the corrosion of steel reinforcement has become a global and global serious problem that seriously threatens the safety of the structure and the development of socioeconomic development. The corrosion of the steel reinforcement framework in the concrete has the characteristics of universality, concealment, progressiveness, paroxysmality and the like, not only consumes resources and pollutes the environment, but also easily induces engineering accidents to endanger the health and the safety of human beings. As in the united states, after a large-scale infrastructure construction period, economic losses due to corrosion alone account for 4-5% of the total GDP. With the steady implementation of the 'ocean strategy' target in China and the gradual promotion of the sea sand resource utilization, how to effectively solve the problem of steel bar corrosion in a concrete structure becomes more and more urgent. The problem of steel bar corrosion is a considerable potential threat in the structural safety and the sustainable development of social economy, and is a serious problem which is urgently faced by the fields of civil engineering of various countries.
At present, scholars at home and abroad mainly develop researches from three aspects of prevention, resistance and treatment on solving the problems of corrosion and improving durability of a concrete structure. The coating-rust resisting method is used for protecting a newly-built structure from the 'prevention' angle or maintaining an existing structure, the special steel bar is used for improving the medium corrosion resistance of a structural material from the 'resistance' angle, and the electrochemical repair principle is used for repairing and treating a corroded concrete structure from the 'treatment' angle. Among them, the solution of the rust problem is most effective from the viewpoint of the material itself. The FRP material has the advantages of light weight, high strength, corrosion resistance and the like, is widely used in the fields of building construction and structural reinforcement, and becomes an important material for solving the problem of structural durability caused by corrosion of reinforcing steel bars. However, the FRP material must be bent and formed before the resin is cured, which greatly reduces the construction flexibility, and the strength of the bent section is only about 40% of the tensile strength of the material, and thus it is not suitable for use as a stirrup. Under the background requirement, the high-strength stainless steel stranded wire 30 is a good choice, has the advantages of corrosion resistance, high strength and the like compared with the common steel bar, has the processing flexibility compared with the FRP bar material and the like, so the high-strength stainless steel stranded wire 30 has the remarkable advantages in the aspect of being used for constructing and building a hoop of a concrete structure with higher durability in site, and can be used for a seawater-sea sand concrete structure and the like. However, the high-strength stainless steel stranded wire 30 needs to be wound on a longitudinal rib framework with certain rigidity to achieve a certain tension state to fully exert the strength, which brings challenges to site construction.
In order to overcome the technical bottleneck, make sea sand safe as early as possible utilization as resources, improve the skeleton construction speed of column member in concrete structure etc. simultaneously, the technical scheme that this application provided is: as shown in fig. 1, a concrete column frame includes a longitudinal bar 10, an end bracket 20, a stainless steel strand 30 and a connecting assembly 40. The longitudinal ribs 10 are made of an FRP layer coated outside a steel bar core, and a plurality of the longitudinal ribs 10 are arranged in a polygonal prism shape. The end face support 20 is arranged at two ends of the plurality of longitudinal ribs 10, the end face support 20 is composed of a plurality of support rods 21 which are connected with each other and intersect at the central axis of the polygonal prism, and two ends of each support rod 21 are respectively fixedly connected with the two longitudinal ribs 10 at opposite positions. The stainless steel strands 30 are helically arranged along the outer circumference of the plurality of longitudinal ribs 10. The connecting assembly 40 is disposed at a connection position of the stainless steel stranded wire 30 and the longitudinal rib 10, and is used for fixedly connecting the stainless steel stranded wire 30 and the longitudinal rib 10.
According to the concrete column framework, the longitudinal rib 10 is formed by covering the FRP layer outside the steel bar inner core, and as the FRP material has good corrosion resistance and has the advantages of high specific strength, good fatigue resistance and the like, the corrosion resistance of the longitudinal rib 10 is obviously improved compared with that of the traditional common steel bar; the end face support 20 is composed of a plurality of support rods 21 intersected at the central axis of the polygonal prism, and two ends of each support rod 21 are respectively and fixedly connected with the two longitudinal ribs 10 at opposite positions, so that the formed framework can effectively restrain the concrete from being stressed and deformed, and the bearing capacity of the column member is greatly improved; the stainless steel stranded wire 30 is used as a substitute material of the traditional stirrup, so that the corrosion resistance of the framework is further enhanced, and compared with the defects that the FRP reinforcement material is poor in construction flexibility and low in bending section strength when used as the stirrup, the stainless steel stranded wire 30 does not need the step of bending and curing, the construction flexibility is high when the stainless steel stranded wire 30 is used in cooperation with the connecting assembly 40, and the tensile strength of a bending part is not weakened along with the shape change because the stainless steel stranded wire 30 is made of a flexible material; the connecting assembly 40 is used for fixing the spiral stainless steel stranded wire 30, so that the position of the fixing point and the distance between the spiral stainless steel stranded wires 30 can be conveniently adjusted, and the construction flexibility is further improved.
Concrete column skeleton in this application has that the construction is convenient fast, the suitability is high, comparatively economic etc. a great deal of is showing practical advantage, can wide application in civil engineering trade, will have higher promotion to present civil engineering construction technology and efficiency.
Alternatively, the attachment assembly 40 may be a separate anchor ear assembly 42, tie wrap 41 assembly, or a combination of anchor ear and tie wrap 41. In the fourth step, the stainless steel strand 30 is pre-connected to the connecting assembly 40 before the pre-stress is applied, and the pre-connection mode may be a slightly locked state of the hoop assembly 42 and the cable tie 41 assembly, so as to ensure that the stainless steel strand 30 slides on the connecting assembly 40.
Optionally, the material composition may also be flexibly changed according to the requirements of the actual engineering, such as the use environment, the production cost, and the like, for example, the longitudinal bar 10 is changed into a common bar, or the stainless steel stranded wire 30 is changed into a common stranded wire, and the like.
Optionally, the end face support 20 is formed by a plurality of support rods 21, an included angle between each support rod 21 and each support rod 21 is adjustable, and the length of each support rod 21 is also adjustable. Can choose the bracing piece 21 of different length according to the design condition in the prefabricated stage of mill to and lay out different contained angles, then carry out welded fastening and constitute holistic terminal surface support 20.
Optionally, the support rods 21 forming the end face support 20 are all the same in length, and included angles between the support rods 21 are the same, so that the cross-sectional shape of the framework is a right-side shape, and correspondingly, the cross-sectional shape of a concrete column member adopting the framework is a circle (the support rods 21 are located on the diameter of the circle); the two support rods 21 forming the end face support 20 have the same length, and the included angles between the support rods 21 are different, so that the section shape of the framework is rectangular, and correspondingly, the section shape of the concrete column member adopting the framework is also rectangular (the support rods 21 are positioned on the diagonal line of the rectangle); the supporting rods 21 forming the end face support 20 may be a plurality of supporting rods, the supporting rods 21 have different lengths, and the included angles between the supporting rods 21 are different, so that the cross-sectional shape of the framework is a non-regular polygon, and correspondingly, the cross-sectional shape of the concrete column member adopting the framework is an ellipse (the supporting rods 21 are located on a chord passing through the center of the ellipse).
The convenient type selection can be better suitable for common projects such as huge amounts of residential civil constructions and infrastructures, and also has the remarkable practical advantages of quick and convenient construction, high adaptability, economy and the like.
In one embodiment, the end bracket 20 is also arranged in the middle of the plurality of longitudinal ribs 10.
As mentioned above, in the actual construction process, it is also necessary to apply a prestress to the stainless steel strand 30, so that the stainless steel strand 30 is tightly stretched on the outer surface of the framework, that is, the stainless steel strand 30 is always in a tensioned state on the outer surface of the longitudinal rib 10, therefore, if the length of the longitudinal rib 10 is too large, the supporting strength of the middle portion of the longitudinal rib is inevitably reduced, and thus, when the prestress is applied to the stainless steel strand 30, the middle portion of the longitudinal rib 10 is easily deformed inwards. To solve this problem, the central portions of the plurality of longitudinal ribs 10 are also connected by the end brackets 20 to be supported.
In one embodiment, the support rod 21 is a retractable support rod 21.
As mentioned above, the support rods 21 with different lengths can be selected to be welded and fixed at the stage of prefabrication in the factory to form the end face bracket 20. In the present embodiment, in order to further improve the construction flexibility, the support rod 21 may be designed as a telescopic support rod 21, and the length of the support rod 21 may be adjusted at any time in a construction site.
Alternatively, the retractable support rod 21 may be a threaded retractable rod or a bayonet retractable rod.
As shown in fig. 2, in one embodiment, the supporting rod 21 includes a first rod 211 and a second rod 212; the first rod 211 is screw-coupled at both ends thereof with second rods 212, respectively, and the length of the support rod 21 is adjusted by screwing the second rods 212.
In this embodiment, the support rod 21 is a threaded telescopic rod, and includes a first rod 211 and a second rod 212. The first rod 211 may be a sleeve, and the corresponding second rod 212 may be an inner rod inserted into the sleeve, and in addition, the first rod 211 may also be an inner rod, and the corresponding second rod 212 may be a sleeve sleeved outside the inner rod. In addition, two ends of the first rod 211 can be respectively set as a sleeve and an inner rod, and the two corresponding second rods 212 are respectively an inner rod and a sleeve.
In one embodiment, the first 211 and/or second 212 bars are provided with graduations.
To facilitate adjustment of the length of the support bar 21, scales are provided on the first bar 211 and/or the second bar 212. Has the advantages of flexible adjustment, strong adaptability, simple and convenient operation and the like.
In one embodiment, the end of the second rod 212 is rotatably connected to the fastener 50, and the fastener 50 is inserted through and fixed to the longitudinal rib 10.
As mentioned above, the two ends of each support rod 21 are fixedly connected to the two opposite longitudinal ribs 10. In this embodiment, the two ends of the support rod 21 are the ends of the two second rods 212. The annular fastener 50 is rotatably connected to the end of the second rod 212, the fastener 50 is sleeved on the outer part of the longitudinal rib 10, and then the two are fixed by welding. The fastening member 50 in this embodiment is for conveniently positioning the longitudinal rib 10, so as to improve the construction efficiency, and the fastening member 50 is rotatably connected to the end of the second rod 212, so as to adjust the length of the support rod 21 by screwing.
Alternatively, the end of the second rod 212 is rotatably coupled to the fastener 50 and may be coupled via a bearing. Specifically, the outer race of the bearing is fixed to the end of the second rod 212, and the inner race is fixed to the fastener 50.
As shown in FIG. 3, in one embodiment, the end of the second rod 212 is rotatably coupled to the fastener 50 via a swivel arrangement; the rotating structure includes a receiving groove 2121 and a circular cake 51 slidably connected to a wall of the receiving groove 2121, one of the end of the second rod 212 and the fastening member 50 is provided with the circular cake 51, and the other is provided with the receiving groove 2121.
Besides the bearing connection mode, the two can be rotationally connected through a rotating structure. Specifically, the end of the second rod 212 is provided with a receiving groove 2121, the fastener 50 is provided with a circular cake 51, and the circular cake 51 can slide and rotate in the receiving groove 2121.
Optionally, the accommodating groove 2121 and the circular cake 51 may be provided with a base body interchangeably, that is, the circular cake 51 is provided at the end of the second rod 212, and the accommodating groove 2121 is provided on the fastening member 50.
In this embodiment, the container 2121 and the cake 51 may be prefabricated at a factory, and then the end of the second rod 212 is connected to the fastener 50, so that the efficiency of the site construction can be improved.
In one embodiment, the fastener 50 is the hoop assembly 42.
Besides the above-mentioned fastener 50 is sleeved and welded on the outside of the longitudinal rib 10, the fastening of the fastener 50 and the longitudinal rib 10 can also be realized by the hoop assembly 42.
In one embodiment, the support rods 21 are provided with a series hole at the middle thereof, and a plurality of support rods 21 can be fixedly connected through the bolt assembly and the series hole.
As mentioned above, the supporting rods 21 with different lengths can be selected and arranged at different angles according to the design conditions in the factory prefabrication stage, and then the end face support 20 can be welded and fixed to form a whole. In the previous embodiment, it has been described that the length of the supporting rod 21 can be adjusted, and correspondingly, the included angle of the supporting rod 21 can also be adjusted at the construction site.
Specifically, a series hole is formed in the middle of each support rod 21, the head of each bolt is fixed through a fixture, the rod portion of each bolt is vertically upward, the series holes of the support rods 21 are sequentially sleeved on the support rods 21 one by one, the included angle between the support rods 21 is adjusted according to the design condition, and finally nuts are screwed on to fix the support rods 21 to form the end face support 20.
As shown in fig. 4-5, in one embodiment, the connecting assembly 40 includes a fixedly connected tie strap 41 and a hoop assembly 42; the binding bands 41 are connected with the longitudinal ribs 10, and the hoop assemblies 42 are connected with the stainless steel stranded wires 30.
In this embodiment, the connecting assembly 40 is a combination of a tie 41 and a hoop assembly 42, wherein the tie 41 is connected to the longitudinal rib 10, and the hoop assembly 42 is connected to the stainless steel strand 30. Before prestress is applied to the stainless steel stranded wires 30, the hoop component 42 can be lightly locked after the stainless steel stranded wires 30 penetrate through the hoop component 42, and only a part of bolts are screwed in, so that the stainless steel stranded wires 30 can be prevented from falling and can slide under subsequent traction.
Preferably, the cable tie 41 and the hoop assembly 42 are integrally formed, and the transition joint between the cable tie 41 and the hoop assembly 42 is designed to be as thin as possible, so that the stainless steel strands 30 and the longitudinal ribs 10 can be tightly attached.
In addition, the connecting member 40 is made of stainless steel, but if the cost of the device needs to be reduced, other cheap materials can be selected to replace metal, but the material needs to be smooth to meet the sliding requirement of the stainless steel stranded wire 30. Such as a polytetrafluoroethylene material.
As shown in fig. 4, in one embodiment, the hoop assembly 42 is a hinged hoop.
The hoop component 42 can be a split type hoop, but the parts of the hoop are large in quantity and easy to lose, and installation and construction are complex. Therefore, the hinge type hoop is preferably adopted in the embodiment, and only one bolt is needed to complete installation.
On the other hand, the technical scheme provided by the application is as follows: a construction method of a concrete column framework comprises the following steps:
step one, as shown in fig. 1, a plurality of longitudinal ribs 10 are configured according to design requirements, and the number of the support rods 21 on the end face bracket 20 is determined according to the number of the longitudinal ribs 10. The ends of the support rods 21 are welded or fixed to the longitudinal ribs 10 by fasteners 50, so that the longitudinal ribs 10 are connected to each other by the end brackets 20.
And step two, installing and arranging the connecting assembly 40 on the longitudinal rib 10 according to the design interval of the stainless steel stranded wire 30.
Step three, as shown in fig. 6, one end of the stainless steel stranded wire 30 is fixedly connected to the end of one of the longitudinal ribs 10 at the bottom of the framework in a welding mode, a hoop component 42, an aluminum clamping head 60 and other modes, then the stainless steel stranded wire 30 is spirally arranged from bottom to top, and the stainless steel stranded wire 30 is movably pre-connected with the connecting component 40.
Step four, as shown in fig. 7, connecting the other end of the stainless steel stranded wire 30 to a tension device 70 or a loading pump, pulling the stainless steel stranded wire 30 by the tension device 70 or the loading pump, applying a prestress according to the design to tighten the stainless steel stranded wire 30 on the outer surface of the framework, then fastening the connecting assembly 40 to fix the longitudinal rib 10 and the stainless steel stranded wire 30 at each contact point, so that the spiral stainless steel stranded wire 30 is always in a tensioned state on the outer surface of the longitudinal rib 10, cutting off the redundant spiral stainless steel stranded wire 30, and finally forming the complete framework.
The construction method of the concrete column framework has the remarkable practical advantages of being fast and convenient to construct, high in adaptability, economical and the like, can be widely applied to the civil engineering industry, and can improve the construction process and efficiency of the civil engineering at present.
In one embodiment, in step one, the ratio of the number of longitudinal ribs 10 to the number of struts 21 on a single end stent 20 is 2: 1. In this embodiment, as shown in fig. 1, the number of the longitudinal ribs 10 is 8, and the number of the support rods 21 on a single end face stent 20 is 4.
In one embodiment, in the first step, the two ends of the support rod 21 may be fixed to the longitudinal ribs 10 by a welding process, or fixed to the longitudinal ribs 10 by the fasteners 50. The fastener 50 is preferably a hinged hoop, so that the support rod 21 and the longitudinal rib 10 can be quickly connected, and the construction efficiency is further improved.
In one embodiment, in the second step, the connecting assembly 40 is composed of a strap 41 and a hoop assembly 42, the strap 41 is bound to the longitudinal rib 10, when the strap 41 is not fastened, the strap 41 can be slid along the longitudinal rib 10 to adjust the position of the connecting assembly 40 relative to the longitudinal rib 10, and the strap 41 is fastened after the position is determined.
In an embodiment, in the third step, the stainless steel strand 30 may also be fixedly connected to the end of one of the longitudinal ribs 10 at the top of the framework, and then the stainless steel strand 30 is spirally arranged from top to bottom, and during the arrangement, the stainless steel strand 30 is movably pre-connected to the connecting assembly 40, that is, as shown in fig. 5, after the stainless steel strand 30 passes through the hoop assembly 42, the hoop assembly 42 may be lightly locked, and a portion of bolts may be screwed in, so as to ensure that the stainless steel strand 30 does not fall and can slide under subsequent traction.
In one embodiment, the other end of the stainless steel strand 30 is connected to a puller 70 or a load pump in step four, and a design pre-stress is applied. The chest expander 70 is a differential pulley chest expander 70 and the charge pump is a hydraulic charge pump.
In one embodiment, the fourth step further comprises the following steps:
when prestress is applied to the other end of the stainless steel stranded wire 30, if the longitudinal rib 10 is deformed inwards due to the inward circumferential force of the stainless steel stranded wire 30, the end face support 20 is added at the deformed position, and the support rod 21 is fixedly connected with the longitudinal rib 10, wherein the specific connection mode is similar to that in the first step.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. A concrete column frame, comprising:
the longitudinal ribs (10), the longitudinal ribs (10) are made of reinforced steel bar cores coated with FRP layers, and the plurality of longitudinal ribs (10) are arranged in a polygonal prism shape;
the end face supports (20), the end face supports (20) are arranged at two ends of the longitudinal ribs (10), the end face supports (20) are composed of a plurality of supporting rods (21) which are connected with each other and intersect at the central axis of the polygonal prism, and two ends of each supporting rod (21) are respectively fixedly connected with the longitudinal ribs (10) at two opposite positions;
stainless steel strands (30), the stainless steel strands (30) being helically arranged along the outer periphery of the plurality of longitudinal ribs (10);
the connecting assembly (40) is arranged at the connecting position of the stainless steel stranded wire (30) and the longitudinal rib (10), and is used for fixedly connecting the stainless steel stranded wire (30) and the longitudinal rib (10);
the middle parts of the support rods (21) are provided with serial holes, and the plurality of support rods (21) can be fixedly connected through bolt assemblies and the serial holes; the included angle between the support rod (21) and the support rod (21) is adjustable, and the length of the support rod (21) is also adjustable;
the support rod (21) comprises a first rod (211) and a second rod (212); the two ends of the first rod (211) are respectively in threaded connection with the second rods (212), and the length of the supporting rod (21) is adjusted by screwing the second rods (212); the end part of the second rod (212) is rotatably connected with an annular fastener (50), and the longitudinal rib (10) is penetrated and fixed in the fastener (50);
the connecting assembly (40) comprises a fixedly connected tie (41) and a hoop assembly (42); the binding belt (41) is connected with the longitudinal rib (10), and the hoop component (42) is connected with the stainless steel stranded wire (30);
the first rod (211) and/or the second rod (212) is/are provided with a scale;
the end of the second rod (212) is rotationally connected with the fastener (50) through a rotating structure;
the rotating structure comprises a containing groove (2121) and a round cake (51) which is connected with the groove wall of the containing groove (2121) in a sliding mode, the round cake (51) is arranged on one of the end portion of the second rod (212) and the fastening piece (50), and the containing groove (2121) is formed in the other one of the end portion of the second rod and the fastening piece.
2. Concrete column frame according to claim 1, characterized in that the end brackets (20) are also arranged in the middle of the longitudinal ribs (10).
3. A method for constructing a concrete column frame according to any one of claims 1-2, comprising the steps of:
determining the number of longitudinal ribs (10) and the number of supporting rods (21) on an end face support (20) according to design conditions, and fixedly connecting the supporting rods (21) with the longitudinal ribs (10) so as to connect the longitudinal ribs (10) with one another through the end face support (20); the end face support (20) consists of a plurality of supporting rods (21) which are connected with each other and intersect at the central axis of the polygonal prism, and two ends of each supporting rod (21) are respectively fixedly connected with the longitudinal ribs (10) at two opposite positions; the included angle between the support rod (21) and the support rod (21) is adjustable, and the length of the support rod (21) is also adjustable; the support rod (21) comprises a first rod (211) and a second rod (212); the two ends of the first rod (211) are respectively in threaded connection with the second rods (212), the length of the supporting rod (21) is adjusted by screwing the second rods (212), and scales are arranged on the first rod (211) and/or the second rods (212); the end part of the second rod (212) is rotatably connected with an annular fastener (50), and the longitudinal rib (10) is penetrated and fixed in the fastener (50);
arranging a connecting assembly (40) at corresponding positions of the longitudinal ribs (10) according to the design interval of the stainless steel stranded wires (30), wherein the connecting assembly (40) comprises a fixedly connected tie (41) and a hoop assembly (42); the binding belt (41) is connected with the longitudinal rib (10), and the hoop component (42) is connected with the stainless steel stranded wire (30);
one end of the stainless steel stranded wire (30) is fixedly connected to the end of any one of the longitudinal ribs (10), and then the stainless steel stranded wire (30) is spirally arranged in the height direction of the framework according to the designed interval and is movably pre-connected with the connecting component (40) at the corresponding position;
after the stainless steel stranded wire (30) is arranged and is finished, prestress is applied to the other end of the stainless steel stranded wire (30), the stainless steel stranded wire (30) is made to be tightly stretched on the outer surface of the longitudinal rib (10), then the connecting assembly (40) is fastened, the longitudinal rib (10) and the stainless steel stranded wire (30) are fixed at each contact point, and therefore the stainless steel stranded wire (30) is made to be multiple, the outer surface of the longitudinal rib (10) is always in a tensioned state, and finally a complete framework is formed.
4. Construction method according to claim 3, wherein the end face support (20) is added at the deformation and the support bar (21) is fixedly connected to the longitudinal bar (10) when prestressing is applied to the other end of the stainless steel strand (30), if the longitudinal bar (10) is deformed inwards due to the inward hoop force of the stainless steel strand (30).
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| CN113356479A (en) | 2021-09-07 |
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