Main body structure construction method of formwork erecting constructional column free of secondary steel bar planting

Abstract

The invention discloses a main body structure construction method of a secondary-bar-planting-free formwork erecting constructional column, and the method is characterized in that horizontal tie bars of a frame column and the constructional column are embedded instead of a bar planting process, so that synchronous formwork erecting and one-time concrete pouring of the constructional column and main body structure concrete are realized; the method breaks through the conventional constructional column construction method that after main body structure concrete is poured, a formwork supporting frame is dismantled, and then construction is conducted, and secondary steel bar planting and a pull-out test needed by steel bar planting construction are avoided. The time required by the embedded steel bar construction for reaching the design strength of a main body structure and the time required by the embedded steel bar construction for waiting for the curing strength of the embedded steel bar glue to reach the requirement for carrying out the embedded steel bar drawing test are saved, and the construction cost of the embedded steel bar and the drawing test is saved, so that the processes of secondary measurement positioning, template erecting and concrete pouring are avoided; the construction interval is shortened, the construction period is shortened, the danger of secondary construction is reduced, and the construction quality of one-time forming of concrete is improved.

Description

Technical Field

[0001] The invention relates to the technical field of structural column construction, and in particular to a main structure construction method of a structural column without secondary reinforcement and formwork support. Background Art

[0002] As an important part of the frame structure, structural columns not only play the role of separation and enclosure, but also significantly improve the overall seismic performance of the building. In modern construction projects, the reasonable design and construction of structural columns are crucial to ensuring the quality and safety of the building. Structural columns are usually set at key locations such as the junction of the inner and outer walls of the building, stairwells, elevator shafts, etc., to enhance the integrity and stability of the building and effectively resist the impact of natural disasters such as earthquakes.

[0003] There are many problems with the traditional construction method of structural columns. First, the construction of structural columns usually needs to be carried out after the main structure construction is completed and the formwork is removed, which leads to a long interval in the construction process and increases the overall construction period of the project. Secondly, the construction of a large number of structural columns places extremely high demands on measurement and layout, which not only increases the difficulty of construction, but also may cause positioning errors. In addition, traditional rebar embedding and pull-out tests are not only affected by the strength of the main structure, but also by the limitations of rebar embedding materials and construction processes, which can easily lead to safety hazards. In the process of supporting formwork and pouring concrete, high-altitude operations are frequent and safety accidents are prone to occur. At the same time, a single formwork system can easily lead to mold expansion, which increases construction costs.

[0004] The shortcomings of the existing technology are mainly reflected in the following aspects: First, the construction period is long. The traditional method requires waiting for the completion of the main structure before starting the construction of the structural column, which prolongs the overall progress of the project; second, the construction cost is high. A large amount of measurement and layout work and high-altitude operations increase the investment of manpower and material resources; third, the safety risk is high. There are high safety hazards in the process of planting and pulling tests. When supporting the formwork and pouring concrete, the formwork is prone to expansion, which affects the construction quality. These problems not only affect the construction efficiency, but also increase the overall cost and safety risks of the project. Summary of the invention

[0005] In view of the above defects or improvement needs of the prior art, the purpose of the present invention is to provide a main structure construction method of structural columns without secondary anchoring and formwork support, which realizes the synchronous formwork and one-time concrete pouring of structural columns and main structure concrete by pre-embedding the horizontal tie bars of frame columns and structural columns instead of the anchoring process, breaking the conventional structural column construction method that requires waiting for the main structure concrete to be poured and then dismantling the formwork support frame for construction, avoiding secondary anchoring and pull-out tests required for anchoring construction, saving the time required for anchoring construction to wait for the main structure to reach the design strength and the time required to wait for the anchor glue to cure to reach the required strength for anchoring pull-out tests, and saving the construction costs of anchoring and pull-out tests, thereby avoiding the processes of secondary measurement and positioning, formwork support and concrete pouring, shortening the construction interval and saving construction period, reducing the risk of secondary construction, and improving the construction quality of one-time concrete forming.

[0006] According to one aspect of the present invention, a main structure construction method of a structural column without secondary reinforcement and formwork is provided, comprising:

[0007] S100, installing the prefabricated structural column reinforcement to the top of the lower structural column reinforcement arranged on the lower floor slab according to the positioning of the structural column, and connecting the prefabricated structural column reinforcement and the lower structural column reinforcement by wire binding, and extending the top of the prefabricated structural column reinforcement into the beam and slab reinforcement of the upper floor slab, and then installing the extruded board on the upper surface and side of the contact surface between the prefabricated structural column reinforcement and the upper floor slab;

[0008] S200, based on step S100, the prefabricated structural column reinforcement and the upper floor slab are reinforced by formwork, and according to the position of the horizontal tie bars required for the infill wall masonry, the template is accurately positioned and holes are opened, and the horizontal tie bars pass through the positioning holes on the template, penetrate the prefabricated structural column reinforcement, and pass through the positioning holes at the other end of the template, to ensure that the length of the horizontal tie bars exposed from the template meets the requirements of the infill wall masonry; the tension screws pass through the reinforcement holes on the template, penetrate the prefabricated structural column reinforcement, and are tightened by nuts to ensure that the structural column will not deform or expand during the pouring of concrete;

[0009] S300, pouring concrete for the structural columns, upper floor slabs and frame columns based on step S200, removing the extruded board after one week of pouring, and roughening and washing the surfaces where the structural columns and upper floor slabs meet to ensure that the adjacent concrete aggregates are exposed;

[0010] S400, on the basis of step S300, the area where the extruded board is removed is filled and poured with slightly expansive fine aggregate concrete of a higher grade, to ensure that the slightly expansive fine aggregate concrete is tightly connected to the structural column and the upper floor slab, and the formwork is removed after the concrete is initially set, to complete the construction of the structural column.

[0011] Furthermore, it also includes: cleaning and straightening the concrete splashed on the steel bars of the lower structural column on the lower floor slab in advance, and then roughening the part of the lower floor slab that is in contact with the structural column, so that the concrete aggregate on the lower floor slab is exposed, thereby increasing the adhesion between the lower floor slab and the structural column.

[0012] Furthermore, the installation of the extruded board in step S100 includes: passing the extruded board through the main reinforcement of the prefabricated structural column and close to the stirrups, checking whether the extruded board is firmly installed to avoid displacement during concrete pouring.

[0013] Furthermore, step S200 also includes reinforcing the frame columns by supporting the formwork and pre-embedding the horizontal tie bars, so that the horizontal tie bars are exposed outside the formwork of the frame columns and the length meets the requirements for the construction of the filling wall.

[0014] Furthermore, the order of pouring concrete in step S300 includes: first pouring the frame columns, then pouring the upper floor slabs, and finally pouring the structural columns.

[0015] Furthermore, the concrete in step S300 should be pre-watered before pouring, on the one hand to wash away the debris generated during the formwork reinforcement process, and on the other hand to keep the formwork surface and the bottom of the structural columns and frame columns moist to prevent the concrete from losing water quickly and affecting the pouring quality.

[0016] Furthermore, before pouring the concrete in step S300, 20-30 mm thick mortar should be poured at the bottom of the structural column and the frame column to make joints, so that the coarse aggregate of the concrete at the bottom of the column is buffered to ensure the quality of pouring; the mortar has the same grade as the concrete used for the concrete pouring.

[0017] Furthermore, it is characterized in that, during the casting of the structural column, the concrete is cast to the side of the extruded board close to the structural column to prevent the structural column and the upper floor slab from being cast as a whole.

[0018] Furthermore, it is characterized in that it also includes masonry of the filling wall. During the masonry, the horizontal tie bars embedded in the frame columns and the structural columns should be connected to the horizontal seams of the filling wall to ensure the stability of the wall and the main body.

[0019] Furthermore, the construction method is not only applicable to the case where the structural column is located on the exterior wall of a building, but also applicable to the case where the structural column is located inside a building.

[0020] Beneficial effects of the present invention:

[0021] 1. This method replaces the rebar embedding process with the pre-embedded horizontal tie bars of the frame columns and structural columns, thereby achieving synchronous formwork support and one-time concrete pouring of the structural columns and the main structure concrete, breaking the conventional method of waiting for the main structure concrete to be poured before dismantling the formwork support frame for construction of the structural columns, avoiding secondary rebar embedding and the pull-out test required for rebar embedding construction, saving the time required for rebar embedding construction to wait for the main structure to reach the design strength and the time required to wait for the rebar embedding glue to reach the required curing strength for the rebar embedding pull-out test, and saving the construction cost of rebar embedding and pull-out test, thereby avoiding the process of secondary measurement and positioning, formwork support and concrete pouring, shortening the construction interval and saving construction period, reducing the risk of secondary construction, and improving the construction quality of one-time concrete forming.

[0022] 2. This method uses extruded boards to separate the top of the structural column from the main structure of the upper floor slab, which does not change the force transmission system of the building structure and speeds up the construction of the structural column. The extruded board material will not react chemically with concrete, but can play a good separation role and is easy to dismantle.

[0023] 3. The extruded board, formwork, tension screw and other materials used in this method are all common materials on the construction site. No customized components are required. The construction is convenient, the operation is simple, and it has a wide range of applications.

[0024] 4. The structural column steel bars used in this method are all prefabricated in a steel bar processing plant, which effectively improves the efficiency of production and installation and reduces the construction risks of high-altitude operations during on-site binding construction.

[0025] 5. When manufacturing the structural column reinforcement, this method increases the binding density of the upper and lower stirrups of the structural column reinforcement, effectively improving the overall seismic performance of the structural column.

[0026] 6. This method is not only applicable to the case where the structural column is located at the edge of the building structure, but also to the case where the structural column is located indoors, which can effectively improve the overall efficiency of building construction.

[0027] Additional aspects and advantages of the present application will be partially given in the following description, which will become apparent from the following description, or will be understood through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0029] Figure 1 This is a flow chart of a main structure construction method of a structural column without secondary reinforcement and formwork in an embodiment of the present invention;

[0030] Figure 2It is a schematic diagram of the main structure construction of a structural column without secondary reinforcement and formwork in an embodiment of the present invention;

[0031] Figure 3 is a schematic diagram of the structural column and floor slab structure after construction in an embodiment of the present invention;

[0032] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0033] 1-upper support embedded parts, 2-lower structural column reinforcement, 3-upper floor slab, 4-prefabricated structural column reinforcement, 5-main reinforcement, 6-stirrups, 7-extruded board, 8-formwork, 9-tension screws, 10-nuts, 11-horizontal tie bars, 12-structural columns, 13-frame columns, 14-filler walls. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] Those skilled in the art will appreciate that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0036] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as in the embodiments of this application.

[0037] The present invention provides a main structure construction method of structural columns without secondary anchoring and formwork support. The method realizes synchronous formwork support and one-time concrete pouring of structural columns and main structure concrete by pre-embedding horizontal tie bars of frame columns and structural columns instead of anchoring process, breaking the conventional structural column construction method of waiting for the main structure concrete to be poured and then dismantling the formwork support frame for construction, avoiding secondary anchoring and pull-out test required for anchoring construction, saving time required for anchoring construction to wait for the main structure to reach the design strength and time required for waiting for the anchor glue to cure to reach the required strength for anchoring pull-out test, saving construction costs of anchoring and pull-out test, thereby avoiding the processes of secondary measurement and positioning, formwork support and concrete pouring, shortening construction intervals and saving construction period, reducing the risk of secondary construction, and improving the construction quality of one-time concrete forming.

[0038] Embodiment 1:

[0039] like Figure 1 As shown, this embodiment provides a main structure construction method of a structural column without secondary reinforcement and formwork, comprising:

[0040] S100, installing the prefabricated structural column reinforcement to the top of the lower structural column reinforcement arranged on the lower floor slab according to the positioning of the structural column, and connecting the prefabricated structural column reinforcement and the lower structural column reinforcement by wire binding, and extending the top of the prefabricated structural column reinforcement into the beam and slab reinforcement of the upper floor slab, and then installing the extruded board on the upper surface and side of the contact surface between the prefabricated structural column reinforcement and the upper floor slab;

[0041] S200, based on step S100, the prefabricated structural column reinforcement and the upper floor slab are reinforced by formwork, and according to the position of the horizontal tie bars required for the infill wall masonry, the template is accurately positioned and holes are opened, and the horizontal tie bars pass through the positioning holes on the template, penetrate the prefabricated structural column reinforcement, and pass through the positioning holes at the other end of the template, to ensure that the length of the horizontal tie bars exposed from the template meets the requirements of the infill wall masonry; the tension screws pass through the reinforcement holes on the template, penetrate the prefabricated structural column reinforcement, and are tightened by nuts to ensure that the structural column will not deform or expand during the pouring of concrete;

[0042] S300, pouring concrete for the structural columns, upper floor slabs and frame columns based on step S200, removing the extruded board after one week of pouring, and roughening and washing the surfaces where the structural columns and upper floor slabs meet to ensure that the adjacent concrete aggregates are exposed;

[0043] S400, on the basis of step S300, the area where the extruded board is removed is filled and poured with slightly expansive fine aggregate concrete of a higher grade, to ensure that the slightly expansive fine aggregate concrete is tightly connected to the structural column and the upper floor slab, and the formwork is removed after the concrete is initially set, to complete the construction of the structural column.

[0044] Example 2

[0045] like Figure 2 Figure 3 As shown, based on Example 1, this embodiment provides a specific construction method for the main structure of a structural column without secondary reinforcement and formwork, including:

[0046] Phase 1: On the completed lower floor slab 1, clean the concrete that may be splashed on the lower structural column steel bars 2, straighten them, and roughen the part of the lower floor slab 1 that is in contact with the structural column 12, so that the concrete aggregate on the lower floor slab 1 is exposed, thereby increasing the adhesion between the lower floor slab 1 and the structural column 12.

[0047] The second stage: while constructing the formwork support frame of the upper floor slab 3, the prefabricated structural column steel bars 4 that have been manufactured in advance in the steel bar processing plant are installed on the top of the lower structural column steel bars 2 according to the positioning of the structural column 12. The prefabricated structural column steel bars 4 and the lower structural column steel bars 2 are connected by wire binding, and the top of the prefabricated structural column steel bars 4 extends into the beam and slab steel bars of the upper floor slab 3.

[0048] The third stage: After the prefabricated structural column reinforcement 4 is installed, the extruded board 7 is respectively installed on the upper surface and side surfaces where the prefabricated structural column reinforcement 4 contacts the upper floor slab 3. The specific installation method is to pass the extruded board 7 through the main reinforcement 5 of the prefabricated structural column reinforcement 4, close to the stirrups 6, and check whether the extruded board 7 is firmly installed to avoid displacement during concrete pouring.

[0049] The fourth stage: After installing the extruded board 7, the structural column 12 and the upper floor slab 3 are reinforced by formwork. According to the position of the horizontal tie bars 11 required for the masonry of the filling wall 14, the template 8 is accurately positioned and holes are opened. The horizontal tie bars 11 are passed through the positioning holes on the template 8, through the prefabricated structural column reinforcement 4 of the structural column 12, and through the positioning holes on the template 8 at the other end, and the length of the horizontal tie bars 11 exposed from the template 8 is ensured to meet the requirements for the masonry of the filling wall 14. In addition, the tension screw 9 is also passed through the reinforcement hole on the template 8, so that it passes through the prefabricated structural column reinforcement 4 of the structural column 12, and through the reinforcement hole on the template 8 at the other end. The two ends of the tension screw 9 are tightened with nuts 10 to ensure that the structural column 12 will not deform or expand when pouring concrete. Similarly, when reinforcing the formwork of the frame column 13, the horizontal tie bars 11 are embedded in the frame column 13 in the same way, so that the horizontal tie bars are exposed outside the formwork 8 of the frame column 13, and the length meets the requirements for the masonry of the filling wall 14. Finally, the overall formwork 8 support system of the upper floor slab 3 is reinforced and inspected.

[0050] Phase 5: After the inspection of the formwork support system is completed, the structural column 12 is poured with concrete together with the upper floor 3 and frame columns 13. The pouring order is: first pour the frame column 13, then pour the upper floor 3, and finally pour the structural column 12. Before pouring concrete, it should be watered to moisten it. On the one hand, it is to wash away the wood chips, rust and other debris generated during the reinforcement process of the formwork 8, and on the other hand, it is to keep the surface of the formwork 8 and the bottom of the structural column 12 and frame column 13 moist to prevent the concrete from losing water quickly and affecting the pouring quality. At the same time, at the bottom of the structural column 12 and the frame column 13, 20-30mm mortar with the same grade as the concrete should be poured first to make joints, so that the coarse aggregate of the concrete at the bottom of the column is buffered to ensure the quality of pouring. It should be noted that in order to ensure that the force transmission system of the building structure is not changed, when pouring the structural column 12, it is only necessary to pour concrete to the side of the extruded board 7 close to the structural column 12, and the concrete of the structural column 12 and the upper floor slab 3 cannot be poured into a whole.

[0051] Stage 6: After pouring the concrete of the structural column 12 and the upper floor slab 3, wait at least 7 days to allow the settlement of the upper floor slab 3 to become uniform, then remove the extruded board 7, and roughen and rinse the surface where the structural column 12 and the upper floor slab 3 meet to ensure that the adjacent concrete aggregates are exposed and kept clean.

[0052] The seventh stage: the area where the extruded board 7 is removed is filled and poured with a higher grade of micro-expansive fine aggregate concrete, and the formwork is hit with a hammer, and the steel bars are inserted into the concrete to ensure that the fine aggregate concrete is fully vibrated and tightly connected with the structural column 12 and the upper floor slab 3.

[0053] Phase 8: After the top of the structural column 12 is filled with fine aggregate concrete, the formwork 8 on the side of the structural column can be removed after the concrete has initially set. Note that the horizontal tie bars 11 should be protected from damage and their positions should not be shifted during removal, thus completing the construction of the structural column.

[0054] Among them, while removing the formwork 8 of the structural column 12, the formwork of the frame column 13 and the upper floor 3 is also removed, and the sides of the structural column 12 and the frame column 13 are cleaned and rinsed to ensure that there is no leaking reinforcement, honeycomb, or rough surface on the surface. Further, according to the requirements of the drawings, the filling wall 14 is built. Note that the bottom of the filling wall 14 should be built flat with two or three small bricks, and the upper part of the small bricks is built with autoclaved aerated concrete blocks (according to the requirements of the design drawings). Note that the masonry should be staggered to control the masonry quality and avoid blind seams, false seams, through seams, transparent seams and other problems. During the masonry, the horizontal tie bars 11 embedded in the frame column 13 and the structural column 12 should be connected to the horizontal seams of the filling wall to ensure the stability of the wall and the main body. Finally, 14 days after the autoclaved aerated concrete blocks are built, the top of the filling wall 14 is built obliquely with small bricks to complete the construction.

[0055] Among the components used in the above construction method, the lower floor slab 1 is a building structure that has been cast, which can be the ground floor of the building or the second floor and above of the building; the lower structural column steel bar 2 is the exposed steel bar at the top of the structural column 12 that has been cast in the lower floor. The upper floor slab 3 is a building structure to be constructed, and concrete is poured together with the structural column 12 between the upper floor slab and the lower floor slab; the prefabricated structural column steel bar 4 is a structural column steel bar that has been made in advance in the steel bar processing plant according to the drawings. Compared with the traditional on-site binding method, the prefabricated finished product improves the efficiency of production and installation and reduces the danger of on-site construction. The main reinforcement 5 is a vertical component of the prefabricated structural column steel bar, which forms a structural column steel bar frame with the stirrup 6. The stirrup 6 is a horizontal constraint component of the prefabricated structural column steel bar 4, which forms a structural column steel bar frame with the main reinforcement 5. The extruded board 7 is a common material at the construction site, and its full name is extruded polystyrene foam board. It has the characteristics of high compression resistance, light weight, non-absorbent, airtight but wear-resistant and degradation-resistant, and it is light in texture, easy to use, and has good corrosion resistance. It is generally used in thermal insulation construction. The template 8 is a common construction material at the construction site. According to the material, there are wooden templates, steel templates, aluminum templates, etc. The template used in the present invention is the most common wooden template. Templates of other materials can also be used according to actual conditions. The tension screw 9 is a common construction material at the construction site. It is a component used to support and fix the template 8 in engineering construction. It is used in combination of a screw and two nuts arranged at both ends of the screw and connected to the screw thread. The nut 10 is arranged at both ends of the screw 8, which plays the role of fastening the tension screw 9 to the template 8, and constrains the template 8 from deforming when subjected to the external force generated by the pouring of concrete. The horizontal tie bar 11 is a steel bar that ties the infill wall 14 to the concrete member according to certain structural requirements. The structural column 12 is a column commonly used in the frame (frame-shear) structure to enhance the integrity and stability of the building. It is often connected to the infill wall 14 or doors and windows and does not bear vertical loads. The frame column 13 is the main vertical support structure that bears the loads from the beams and slabs in the frame (frame-shear) structure and transmits the loads to the foundation. The infill wall 14 is a wall that plays a role of enclosure and separation in the frame (frame-shear) structure. The weight is borne by the beams and columns, and the infill wall does not bear weight.

[0056] In summary, this method replaces the rebar embedding process with the pre-embedded horizontal tie bars of the frame columns and the structural columns, thereby realizing the synchronous formwork and one-time concrete pouring of the structural columns and the main structure concrete, breaking the conventional method of waiting for the main structure concrete to be poured before dismantling the formwork support frame for structural column construction, avoiding the secondary rebar embedding and the pull-out test required for rebar embedding construction, saving the time required for rebar embedding construction to wait for the main structure to reach the design strength and the time required to wait for the rebar embedding glue to reach the required curing strength for the rebar embedding pull-out test, and saving the construction cost of rebar embedding and pull-out test, thereby avoiding the process of secondary measurement and positioning, formwork support and concrete pouring, shortening the construction interval and saving construction period, reducing the risk of secondary construction, and improving the construction quality of one-time concrete forming.

[0057] It should be understood that, although the steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0058] The above is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A main structure construction method for a structural column without secondary reinforcement and formwork, characterized in that: include: S100, installing the prefabricated structural column reinforcement to the top of the lower structural column reinforcement arranged on the lower floor slab according to the positioning of the structural column, and connecting the prefabricated structural column reinforcement and the lower structural column reinforcement by wire binding, and extending the top of the prefabricated structural column reinforcement into the beam and slab reinforcement of the upper floor slab, and then installing extruded panels on the upper surface and side surfaces of the contact surface between the prefabricated structural column reinforcement and the upper floor slab; S200, based on step S100, the prefabricated structural column reinforcement and the upper floor slab are reinforced by formwork, and according to the position of the horizontal tie bars required for the infill wall masonry, the template is accurately positioned and holes are opened, and the horizontal tie bars pass through the positioning holes on the template, penetrate the prefabricated structural column reinforcement, and pass through the positioning holes at the other end of the template, to ensure that the length of the horizontal tie bars exposed from the template meets the requirements of the infill wall masonry; the tension screws pass through the reinforcement holes on the template, penetrate the prefabricated structural column reinforcement, and are tightened by nuts to ensure that the structural column will not deform or expand during the pouring of concrete; S300, pouring concrete for the structural columns, upper floor slabs and frame columns based on step S200, removing the extruded board after one week of pouring, and roughening and washing the surfaces where the structural columns and upper floor slabs meet to ensure that adjacent concrete aggregates are exposed; S400, on the basis of step S300, the area where the extruded board is removed is filled and poured with slightly expansive fine aggregate concrete of a higher grade, to ensure that the slightly expansive fine aggregate concrete is tightly connected to the structural column and the upper floor slab, and the formwork is removed after the concrete is initially set, to complete the construction of the structural column.

2. The main structure construction method of the structural column without secondary reinforcement and formwork according to claim 1 is characterized in that: Also includes: Clean the concrete splashed on the steel bars of the lower structural columns on the lower floor slab in advance and straighten them. Then, roughen the part of the lower floor slab that is in contact with the structural columns so that the concrete aggregate on the lower floor slab is exposed, thereby increasing the adhesion between the lower floor slab and the structural columns.

3. The main structure construction method of the structural column without secondary reinforcement and formwork according to claim 1 is characterized in that: The installation of the extruded board in step S100 includes: passing the extruded board through the main reinforcement of the prefabricated structural column and close to the stirrups, checking whether the extruded board is firmly installed to avoid displacement during concrete pouring.

4. The main structure construction method of the structural column without secondary reinforcement and formwork according to claim 1 is characterized in that: Step S200 also includes reinforcing the frame columns by supporting the formwork and pre-embedding the horizontal tie bars, so that the horizontal tie bars are exposed outside the formwork of the frame columns and the length meets the requirements for the construction of the filling wall.

5. The main structure construction method of the structural column without secondary reinforcement and formwork according to claim 1 is characterized in that: The order of pouring concrete in step S300 includes: first pouring the frame columns, then pouring the upper floor slabs, and finally pouring the structural columns.

6. The main structure construction method of the structural column without secondary reinforcement and formwork according to claim 5 is characterized in that: The concrete in step S300 should be pre-watered before pouring, on the one hand to wash away the debris generated during the template reinforcement process, and on the other hand to keep the template surface and the bottom of the structural column and frame column moist to prevent the concrete from losing water quickly and affecting the pouring quality.

7. The main structure construction method of the structural column without secondary reinforcement and formwork according to claim 5 is characterized in that: Before pouring the concrete in step S300, 20-30 mm thick mortar should be poured at the bottom of the structural column and the frame column to make joints, so that the coarse aggregate of the concrete at the bottom of the column is buffered to ensure the quality of pouring; the mortar has the same grade as the concrete used for the concrete pouring.

8. A main structure construction method for a structural column without secondary reinforcement and formwork according to any one of claim 5, characterized in that: During the casting of the structural column, in order to prevent the structural column and the upper floor slab from being cast as a whole, concrete only needs to be cast to the side of the extruded board close to the structural column.

9. A main structure construction method for a structural column without secondary reinforcement and formwork according to any one of claims 1 to 8, characterized in that: It also includes the construction of infill walls. During the construction, the horizontal tie bars embedded in the frame columns and structural columns should be connected to the horizontal seams of the infill walls to ensure the stability of the wall and the main body.

10. A main structure construction method for a structural column without secondary reinforcement and formwork according to any one of claims 1 to 8, characterized in that: The construction method is not only applicable to the case where the structural column is located on the exterior wall of a building, but also applicable to the case where the structural column is located indoors of a building.

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