CN108999341B - Engaged steel-concrete combined column and column connecting node and manufacturing method - Google Patents
Engaged steel-concrete combined column and column connecting node and manufacturing method Download PDFInfo
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- CN108999341B CN108999341B CN201811057280.4A CN201811057280A CN108999341B CN 108999341 B CN108999341 B CN 108999341B CN 201811057280 A CN201811057280 A CN 201811057280A CN 108999341 B CN108999341 B CN 108999341B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
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- E04C3/30—Columns; Pillars; Struts
- E04C3/36—Columns; Pillars; Struts of materials not covered by groups E04C3/32 or E04C3/34; of a combination of two or more materials
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Abstract
The invention discloses a joint type steel-concrete combined column and column connecting node and a manufacturing method, which are applied to modular assembly type buildings, wherein the node comprises: at least two box steel columns to be connected, two box steel columns are adjacent and horizontally connected, the opposite side surfaces of one box steel column and the other box steel column are mutually meshed together so that the two box steel columns work cooperatively, and concrete is poured in the box steel columns. The side that two adjacent box steel columns are connected is equipped with card plug-in components and/or draw-in groove, and the card plug-in components of one box steel column inserts the draw-in groove of another box steel column in order to make two adjacent box steel column relative face interlock each other together. The invention provides a meshed steel-concrete combined column and column connecting node and a manufacturing method, which are convenient for site construction, improve the production efficiency of a building, effectively improve the stress property of a module assembly type column-column connecting structure, the anti-seismic performance of a module assembly type house and enhance the structural integrity.
Description
Technical Field
The invention relates to the technical field of modular assembly type buildings, in particular to a meshed steel-concrete combined column and column connecting node which is convenient for site construction, improves the production efficiency of the building, effectively improves the stress property of a modular assembly type column-column connecting structure, the anti-seismic performance of a modular assembly type house and enhances the structural integrity, and a manufacturing method.
Background
In the actual construction process of the assembled building, the connection parts among the prefabricated components are often difficult to construct, and the hoisting components are not easy to construct and position, so that the construction quality and the assembly efficiency are reduced. For the assembled building, the connection of the columns is the key for ensuring the safety of the structure; the fabricated component connection is carried out by a wet connection method, so that the connection quality is greatly improved, and most of the connecting components at present need to be reserved with holes for pumping concrete; part of novel connecting nodes ensure quick positioning of the upper column and the lower column by arranging a positioning plate; some connecting nodes use steel ribs to strengthen the connection strength of concrete and columns. At present, the connection mode of the columns adopts the modes of bolt connection, welding connection and the like; (1) The bolt connection belongs to dry connection, the construction process is convenient and quick, the on-site dense construction is needed to ensure the tight connection between the columns, the time consumption is more, the labor cost is slightly high, the bolt connection is easy to loosen under the action of power, and meanwhile, the wall of the prefabricated full-decoration building module needs to be modified to a certain extent, as in a patent CN106759947A; (2) The column-column welding connection has excellent anti-seismic performance and reliable connection, but is not easy to disassemble the welding part when the connection is needed to be disassembled; meanwhile, various defects are easy to exist in the welding seam, the quality of the welding seam in the welding process is difficult to control, and meanwhile, the main metal near the welding seam is easy to cause material embrittlement due to the influence of high temperature in the welding process, so that stress concentration is generated in a component to expand cracks; after welding, the connecting parts are expanded and contracted unevenly, so that the components are deformed by welding residues, and the original plane steel plates are possibly deformed in a concave-convex manner, and the like, as in patent CN106812215A; in addition, the welding work has large workload on the assembly site, and the quality is not easy to ensure. Therefore, a column-column horizontal connection structure which has excellent static force performance, excellent earthquake resistance performance, high working efficiency and construction efficiency of the modularized column group and is safe for examination needs to be provided.
Disadvantages of the prior art:
1. the connection modes of most nodes only adopt the common bolt connection or welding mode, the novel connection modes are fewer, and the connection nodes only can not ensure good compactness, safety, stability and the like;
2. the traditional assembly type column-column vertical connecting node is in a precast concrete column-column lap joint mode, concrete grouting materials are conveyed through sleeve connection, the situation that the inside is not filled is easy to occur due to the difference of field construction processes, and the grouting compaction situation cannot be observed intuitively;
3. the bolt connection is adopted, so that the field dense construction is required, the labor cost is high, the problems of slippage, large integral deformation and the like are easy to occur under the action of a large load, the loosening is easy to occur under the action of power, the bolt is easy to burst under the fire disaster, and meanwhile, the wall body of the prefabricated full-decoration building module is required to be modified, so that the time and the labor are consumed;
4. the welding machine is required to be transported to the installation layer during column-column welding, and the welding quality of the welding line is difficult to ensure due to the field construction process difference; after welding, the connecting parts are expanded unevenly to deform the components, so that the original planar steel plates can be deformed unevenly, and the like, meanwhile, the pre-buried steel plates and welding seams are easy to corrode, and protective measures are needed to be taken, so that the cost of anti-corrosion treatment is increased.
Therefore, there is a need to develop a joint for connecting a meshed steel-concrete composite column and a column, which is convenient for field construction, has high building production efficiency, effectively improves the stress property of a module assembly type column-column connecting structure, the anti-seismic performance of a module assembly type house, and enhances the structural integrity, and a manufacturing method.
Disclosure of Invention
The invention aims to provide a meshed steel-concrete combined column-column connecting horizontal connecting node and a manufacturing method, wherein the meshed steel-concrete combined column-column connecting horizontal connecting node is convenient to construct on site, high in building production efficiency and capable of effectively improving stress characteristics of a module assembly type column-column connecting structure, anti-seismic performance of a module assembly type house and enhancing structural integrity.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: provided is a snap-in steel-concrete composite column-to-column connection node comprising: at least two box steel columns to be connected, two box steel columns are adjacent and horizontally connected, one box steel column is meshed with the other box steel column, so that the two adjacent box steel columns work cooperatively, and concrete is poured in the box steel columns.
The side surfaces of two adjacent box steel columns are provided with a clamping insert and/or a clamping groove, and one clamping insert of one box steel column is inserted into the clamping groove of the other box steel column so that the side surfaces of two adjacent box steel columns are mutually meshed together.
The clamping inserts of one box steel column and the clamping grooves of the other box steel column are uniformly distributed on the side surfaces of the box steel columns along the longitudinal directions of the box steel columns respectively.
The side that two adjacent box steel columns are connected is equipped with card plug-in components and draw-in groove simultaneously, every card plug-in components and draw-in groove on the box steel column follow box steel column longitudinal direction is in turn the interval arrangement on the side of box steel column.
The clamping insert is of a U-shaped structure formed by bending steel bars, two ends of the clamping insert are welded to the side face of the box steel column, and the clamping groove penetrates through the side face and the inner space of the box steel column.
When the clamping insert of one box steel column is inserted into the clamping groove of the other box steel column, the U-shaped structure integrally enters the other box steel column through the clamping groove.
When the card plug-in components of one box steel column inserts another box steel column in the draw-in groove, the U type structure is whole gets into this another box steel column's inside, still includes vertical reinforcing bar, vertical reinforcing bar vertically disposes this another box steel column's inside and pass in the longitudinal direction U type structure.
The upper end and the lower end of the box steel column can be respectively connected with another box steel column in the longitudinal direction, and the box steel columns distributed in the longitudinal direction are connected through longitudinal steel bars.
In order to achieve the above object, the present invention also provides a method for connecting a snap-in steel-concrete composite column to a column connection node, comprising the steps of:
1. manufacturing a box steel column according to design requirements;
2. cutting the steel bars according to a certain length, and bending the cut steel bars into a U-shaped structure;
3. welding two ends of a steel bar bent into a U-shaped structure on the side surface of the box steel column to be horizontally connected with another box steel column to form a clamping insert, wherein a clamping groove is formed on the corresponding side surface of the other box steel column, and the clamping groove penetrates through the side surface and the inner space of the other box steel column;
4. transporting the manufactured clamping inserts and the box steel columns provided with the clamping grooves to a construction site, orderly and horizontally connecting, inserting the clamping inserts of one box steel column into the clamping grooves of the other box steel column, and enabling the U-shaped structure to integrally enter the interior of the other box steel column through the clamping grooves;
5. and (5) pouring concrete inwards after the bar planting is completed, and naturally curing and forming.
And the step 4 and the step 5 further comprise the following steps: the method further comprises a step of placing the longitudinal steel bars, wherein after the U-shaped structure integrally enters the other box-shaped steel column through the clamping groove, the longitudinal steel bars are longitudinally distributed in the other box-shaped steel column and penetrate through the U-shaped structure, and the longitudinal steel bars are fixed.
Compared with the prior art, in the joint and the manufacturing method of the occluded steel-concrete combined column and the column, the steel-concrete combined column is adopted, namely, concrete is poured in the box steel column to form the steel-concrete combined column, and the steel-concrete combined column has good ductility, strong energy consumption and good earthquake resistance after being molded; the box steel columns are prefabricated in factories, so that the construction of the box steel columns is very convenient in the connecting process, and the module structure and the box steel columns are prefabricated in factories, so that the building productivity is improved; the concrete is restrained by the box steel column and is in a multidirectional compression state, so that the concrete is prevented from being excessively deformed; the inserted longitudinal steel bars provide longitudinal and transverse constraint, concrete is poured after hoisting is completed, and the horizontal drawknot effect of the middle column node area is particularly improved; the reinforcement bar with the welded U-shaped structure can realize the function of reinforcement bar encryption, and the longitudinal reinforcement bar and the concrete in the compression zone are connected in parallel to enable the reinforcement bar and the concrete to work cooperatively, so that the overall stress property of the assembled column-column connection structure and the anti-seismic performance of the module assembled house are effectively improved, and the structural integrity is enhanced.
The invention will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.
Drawings
Fig. 1 is a schematic diagram showing four modular structures assembled together.
FIG. 2 is a schematic cross-sectional view of one embodiment of a snap-in steel-concrete composite column and column connection node of the present invention.
Fig. 3 is a schematic view of one embodiment of a box steel column.
Fig. 4 is a view showing another angle of the box column.
Detailed Description
In modern module assembled building, building modularization is carried out on each module structure, prefabrication and full fitment are carried out in factories, then hoisting is carried out on site, connection between each module and each module is often difficult to construct, connection between columns is a key part, and the key of whether the modularized building can be developed more greatly is also provided, so how to quickly and firmly connect the modules with each other is a technical problem to be solved urgently by the technicians in the field, however, the prior solution is limited, connection between the columns is realized mostly through a large number of site welding, various defects exist on welded joints, and a large number of manpower and material resources are needed on a construction site, the construction manpower cost is high, the difficulty is high, the efficiency is low, the development enthusiasm of the modularized assembled building industry is greatly reduced, and the popularization and the application of the assembled building are not facilitated. In the invention, the key point is that a new connection scheme is provided for the connection between the columns, so that the columns can be quickly hoisted on site, the construction is conveniently and quickly performed, the construction difficulty and the labor cost are greatly reduced, the construction efficiency is improved, and the mechanical property of the structural member can be well improved.
Embodiments of the present invention will now be described with reference to the drawings, wherein like reference numerals represent like elements throughout. As described above, as shown in fig. 2, in order to achieve the above object, the technical solution provided by the embodiment of the present invention is: there is provided a snap-in steel-concrete composite column-to-column connection node, comprising in this embodiment: four box steel columns 2 to be connected, four box steel columns 2 are adjacent and horizontally connected, the cross sections of the four box steel columns 2 are square, in the four box steel columns 2, every two adjacent box steel columns 2 are horizontally connected, one box steel column 2 is meshed with the other side surface connected with the box steel columns 2, so that the two adjacent box steel columns 2 work cooperatively, and concrete 5 is poured in the box steel columns 2, so that the effect of enabling the two box steel columns 2 to be meshed together is achieved. It should be noted that, as shown in fig. 1, the four box steel columns 2 are four corner columns in the module structure, that is, the columns located at the corners in the first module, the second module, the third module and the fourth module shown in fig. 1, and the four box steel columns 2 are horizontally connected between every two adjacent box steel columns 2 so that the four module structures are connected together, wherein, as shown in fig. 1, four columns with filling patterns located at the corners in the first module, the second module, the third module and the fourth module are the box steel columns 2 in the embodiment.
In one embodiment, as shown in fig. 2 and 3, the side surfaces of two adjacent box steel columns 2 connected are provided with a clamping insert 1 and/or a clamping groove 3, and the clamping insert 1 of one box steel column 2 is inserted into the clamping groove 3 of the other box steel column 2 so that the side surfaces of two adjacent box steel columns 2 connected are mutually meshed together.
In the embodiment shown in fig. 2 and 3, the side surfaces of two adjacent box steel columns 2 connected are simultaneously provided with a clamping insert 1 and a clamping groove 3, and the clamping insert 1 and the clamping groove 3 of one box steel column 2 and the clamping groove 3 and the clamping insert 1 of the other box steel column 2 are mutually inserted so that the side surfaces of two adjacent box steel columns 2 connected are mutually meshed together. As shown in fig. 3, the side surface of the box steel column 2 connected with the other box steel column 2 is provided with the clamping insert 1 and the clamping groove 3, in the hoisting process, only the two box steel columns 2 are required to be hoisted together, then the clamping insert 1 of one box steel column 2 and the clamping groove 3 of the other box steel column 2 are slowly moved to be clamped together, namely the clamping insert 1 of one box steel column 2 is led to enter the clamping groove 3 of the other box steel column 2, the horizontal connection of the two box steel columns 2 can be completed, any field welding procedure is not required, so that the field construction efficiency of the connection between the columns is greatly improved, the field construction difficulty is reduced, the field construction energy consumption is reduced, and the labor cost is reduced.
In the embodiment shown in fig. 4, the card insert 1 of one box steel column 2 and the card slot 3 of the other box steel column 2 are respectively and uniformly arranged on the side surfaces of the box steel columns 2 along the longitudinal direction of the respective box steel columns 2. The clamping insert 1 and the clamping groove 2 are well meshed, so that the two box steel columns 2 which are horizontally connected are integrally well meshed together. It should be noted that, since the structures of the two horizontally connected box steel columns 2 are the same, fig. 3 and 4 exemplarily show perspective views of one of the box steel columns 2, and from fig. 4, it can be intuitively and simply seen that the card insert 1 and the card slot 3 are disposed on the side surfaces of the box steel column 2 along the longitudinal direction, and in this embodiment, two side surfaces of the box steel column 2 need to be connected to the other box steel column 2.
In one embodiment, the side surfaces of two adjacent box steel columns 2 are simultaneously provided with a clamping insert 1 and a clamping groove 3, and the clamping insert 1 and the clamping groove 3 on each box steel column 2 are sequentially arranged on the side surface of the box steel column 2 at intervals along the longitudinal direction of the box steel column 2. In this embodiment, the card insert 1 and the card slot 3 are sequentially arranged at intervals along the longitudinal direction of the box steel column 2, and the width of the card insert 1 and the card slot 3 needs to be designed to be about two thirds of the width of the side surface of the box steel column 2, so that the two horizontally connected box steel columns 2 are more convenient to connect, the occlusion effect is better, and the synergy is higher.
In one embodiment, as shown in fig. 3, the card insert 1 is a U-shaped structure formed by bending steel bars, and two ends of the card insert are welded to the side surface of the box steel column 2, and the card slot 3 penetrates through the side surface and the inner space of the box steel column 2. The clamping groove 3 may be formed by cutting on the side surface of the box steel column 2.
In one embodiment, as shown in fig. 3, when the card insert 1 of one box steel column 2 is inserted into the card slot 3 of another box steel column 2, the U-shaped structure integrally enters the interior of the other box steel column 2 through the card slot 3. Therefore, the box steel column 2 is inserted into another box steel column 2 through the clamping insert 1, so that in order to improve the meshing effect, the U-shaped structure integrally passes through the clamping groove 3 to enter the other box steel column 2, and the meshing effect between two box steel columns can be greatly improved, and the cooperativity of the two box steel columns 2 is improved.
In one embodiment, as shown in fig. 1, when the card insert 1 of one box steel column 2 is inserted into the card slot 3 of another box steel column 2, the U-shaped structure integrally enters the inside of the other box steel column 2, and further includes a longitudinal steel bar 4, where the longitudinal steel bar 4 is longitudinally arranged in the inside of the other box steel column 2 and passes through the U-shaped structure in the longitudinal direction. The longitudinal steel bars 4 are inserted, so that longitudinal and transverse constraint can be provided, concrete is filled after hoisting is completed and the hoisting is horizontally connected, and the horizontal drawknot function of the column joint area can be well improved; the function of stirrup encryption can be realized to the reinforcing bar of welding U type structure, and the longitudinal reinforcement 4 of parallelly connected and compression district concrete make its collaborative work, effectively improve modularization assembled building post column connection structure atress property and module assembled house's shock resistance, reinforcing structure wholeness. In addition, the longitudinal steel bar 4 also plays a role in connecting with the lower column, penetrates through the clamping groove through the clamping insert with the horizontal box steel column, then is longitudinally inserted into the U-shaped structure of the clamping insert to be connected, and concrete 5 is poured into the box steel column 2 after hoisting is completed, so that the overall performance of the modular assembled building is greatly improved.
In one embodiment, the upper end and the lower end of the box steel column 2 may be connected to another box steel column 2 in the longitudinal direction, and the box steel 2 columns arranged in the longitudinal direction may be connected by longitudinal steel bars 4. So can greatly reduce the degree of difficulty that box steel column 2 was connected at longitudinal direction and other box steel columns 2, also greatly improved the on-the-spot efficiency of construction that box steel column was connected at longitudinal direction moreover realizes the effect of modular building quick assembly. In addition, the longitudinal steel bars and the clamping inserts bear the shearing force generated by horizontal load under the action of horizontal load such as earthquake, so that the four columns act together to improve the bending resistance and the overall bearing efficiency of the columns. The combined area of the longitudinal steel bars and the clamping inserts exerts a secondary constraint effect on core concrete, the stress performance of the concrete is obviously improved under the double constraint effect of the box steel columns and the combined area, and meanwhile, the premature yielding of the longitudinal steel bars can be prevented, so that the longitudinal steel bars and the box steel columns can work cooperatively well until members are damaged, and materials are effectively utilized.
The embodiment of the invention also provides a method for connecting the meshed steel-concrete combined column and the column, which comprises the following steps:
1. the box steel column is manufactured according to the design requirement, the cross section of the box steel column is square, rectangular and the like, and the box steel column with the square cross section can be selected in the embodiment, and in addition, the box steel column can also be formed steel;
2. cutting the steel bar according to a certain length, and bending the cut steel bar into a U-shaped structure by a bending machine, wherein the steel bar can be round steel or deformed steel bar;
3. welding two ends of a steel bar bent into a U-shaped structure on the side surface of the box steel column to be horizontally connected with another box steel column to form a clamping insert, wherein a clamping groove is formed in the corresponding side surface of the other box steel column, the clamping groove penetrates through the side surface and the inner space of the other box steel column, the clamping insert and the clamping groove can be welded simultaneously in the opposite side surfaces of the two box steel columns needing to be horizontally connected, the clamping insert and the clamping groove are sequentially arranged on the side surface of the box steel column at intervals along the longitudinal direction, and the clamping insert and the clamping groove are arranged on the side surface of the box steel column side by side in the longitudinal direction, so that the side surfaces of the two box steel columns needing to be horizontally connected can be well and horizontally connected;
4. the method comprises the steps of transporting the manufactured clamping inserts and the box steel columns provided with clamping grooves to a construction site, and orderly and horizontally connecting the clamping inserts and the box steel columns provided with the clamping grooves, specifically, using the manufactured clamping inserts and the box steel columns provided with the clamping grooves for modularized assembly type structures, then transporting the column module structures to the construction site, orderly carrying out vertical and horizontal connection, inserting the clamping inserts of one box steel column into the clamping grooves of the other box steel column, and enabling the U-shaped structures to integrally enter the other box steel column through the clamping grooves; therefore, the box steel column is inserted into another box steel column through the clamping insert 1, so that in order to improve the meshing effect, the U-shaped structure integrally passes through the clamping groove to enter the other box steel column, and the meshing effect between two box steel columns can be greatly improved, and the cooperativity of the two box steel columns is improved.
5. And (5) pouring concrete inwards after the splicing is completed, and naturally curing and forming.
And the step 4 and the step 5 further comprise the following steps: the method further comprises a longitudinal steel bar placing step, wherein after the U-shaped structure integrally enters the other box-shaped steel column through the clamping groove, the longitudinal steel bars are longitudinally arranged in the other box-shaped steel column and penetrate through the U-shaped structure. Longitudinal steel bars are inserted to provide longitudinal and transverse constraint, concrete is poured after hoisting is completed and horizontal connection is completed, and the horizontal drawknot function of the column joint area can be well improved;
the function of stirrup encryption can be realized to the reinforcing bar of welding U type structure, and the longitudinal reinforcement 4 of parallelly connected and compression district concrete make its collaborative work, effectively improve modularization assembled building post column connection structure atress property and module assembled house's shock resistance, reinforcing structure wholeness. In addition, the longitudinal steel bar 4 also plays a role in connecting with the lower column, penetrates through the clamping groove through the clamping insert with the horizontal box steel column, then is longitudinally inserted into the U-shaped structure of the clamping insert to be connected, and concrete 5 is poured into the box steel column 2 after hoisting is completed, so that the integral structure of the modular assembled building is greatly improved.
In one embodiment, the upper end and the lower end of the box steel column may be connected to another box steel column in the longitudinal direction, and the box steel columns arranged in the longitudinal direction may be connected by longitudinal steel bars 4. So can greatly reduce the degree of difficulty that box steel column was connected at longitudinal direction and other box steel columns, also greatly improved the on-the-spot efficiency that box steel column was connected at longitudinal direction has realized the effect of modular building quick assembly moreover. In addition, the longitudinal steel bars and the clamping inserts bear the structure under horizontal load such as earthquake so as to resist shearing force generated by the horizontal load. The combined area of the longitudinal steel bars and the clamping inserts applies a secondary constraint effect to the core concrete, the stress performance of the concrete is obviously improved under the double constraint effect of the box steel columns and the combined area, and meanwhile, the premature yielding of the longitudinal steel bars can be prevented, so that the longitudinal steel bars and the box steel columns can work cooperatively well until members are damaged, and the material strength is effectively utilized.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (6)
1. A snap-in steel-concrete composite column-to-column connection node comprising: at least two box steel columns to be connected, wherein the two box steel columns are adjacent and horizontally connected, the side surface of one box steel column connected with the other box steel column is mutually meshed together, and concrete is poured in the box steel columns;
the side surfaces of the adjacent two box steel columns are provided with a clamping insert and/or a clamping groove, and the clamping insert of one box steel column is inserted into the clamping groove of the other box steel column so that the side surfaces of the adjacent two box steel columns are mutually meshed;
the clamping inserts of one box steel column and the clamping grooves of the other box steel column are respectively and uniformly distributed on the side surfaces of the box steel columns along the longitudinal directions of the box steel columns;
the clamping insert is of a U-shaped structure formed by bending steel bars, two ends of the clamping insert are welded to the side face of the box steel column, and the clamping groove penetrates through the side face and the inner space of the box steel column;
when the card plug-in components of one box steel column inserts another box steel column in the draw-in groove, the U type structure is whole gets into this another box steel column's inside, still includes vertical reinforcing bar, vertical reinforcing bar vertically disposes this another box steel column's inside and pass in the longitudinal direction U type structure.
2. The snap-in steel-concrete composite column-column connection joint according to claim 1, wherein the side surfaces of two adjacent box steel columns connected are simultaneously provided with a clamping insert and a clamping groove, and the clamping insert and the clamping groove on each box steel column are sequentially arranged on the side surface of the box steel column at intervals along the longitudinal direction of the box steel column.
3. The snap-in steel-concrete composite column-to-column connection node of claim 1 or 2, wherein when said clip insert of one said box steel column is inserted into said clip slot of another said box steel column, said U-shaped structure is integrally passed through said clip slot into the interior of said other said box steel column.
4. The snap-in steel-concrete composite column and column connection node according to claim 1, wherein the upper end and the lower end of the box steel column can be respectively connected with another box steel column in the longitudinal direction, and the box steel columns arranged in the longitudinal direction are connected through longitudinal steel bars.
5. A method of making the snap-in steel-concrete composite column-to-column joint of claim 1, comprising the steps of:
(1) Manufacturing a box steel column according to design requirements;
(2) Cutting the steel bars according to a certain length, and bending the cut steel bars into a U-shaped structure;
(3) Welding two ends of a steel bar bent into a U-shaped structure on the side surface of the box steel column to be horizontally connected with another box steel column to form a clamping insert, wherein a clamping groove is formed on the corresponding side surface of the other box steel column, and the clamping groove penetrates through the side surface and the inner space of the other box steel column;
(4) Transporting the manufactured clamping inserts and the box steel columns provided with the clamping grooves to a construction site, orderly and horizontally connecting, inserting the clamping inserts of one box steel column into the clamping grooves of the other box steel column, and enabling the U-shaped structure to integrally enter the interior of the other box steel column through the clamping grooves;
(5) And pouring concrete inwards after the splicing is completed, and naturally curing and forming.
6. The method of claim 5, further comprising, between step 4 and step 5: the method further comprises a step of placing the longitudinal steel bars, wherein after the U-shaped structure integrally enters the other box-shaped steel column through the clamping groove, the longitudinal steel bars are longitudinally distributed in the other box-shaped steel column and penetrate through the U-shaped structure, and the longitudinal steel bars are fixed.
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