Three-face enlarged structural column structure and construction method

Abstract

The invention provides a three-face enlarged structural column structure and a construction method. The construction method comprises the following steps of: chiseling off plaster layers of three amplification surfaces and a plaster layer of an original surface of an original structural column to respectively obtain a dust removal amplification surface and a dust removal original surface; scabbling the three ash removal amplification surfaces, and arranging transverse tooth grooves which are distributed at intervals along the longitudinal direction on the ash removal original surface; reinforcing longitudinal bars are arranged outside the ash removal amplification surface and the ash removal original surface through embedded bars; closed stirrups are arranged along the transverse tooth grooves, surround the three ash removal amplification surfaces and are connected with the reinforcing longitudinal bars; reinforcing anchor tie bars are arranged in the three ash removal amplification surfaces through embedded steel bars; hanging a steel wire mesh on one side of the ash removal original surface by adopting high-strength cement mortar, and plastering; a formwork is erected around the original structure column, and concrete is poured; and after the concrete is solidified, the formwork is removed, maintenance is conducted, and the three-face enlarged structural column structure is obtained. The construction method is clear in construction steps and easy to implement, and the construction period is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of building engineering structure reinforcement, and particularly to a structure column with three-sided enlargement and a construction method thereof. Background Art

[0003] During the reinforcement process, increasing the cross-section of beams and columns is often the most commonly chosen method. According to design calculations and appraisals, there are several methods such as unilateral, bilateral, three-sided, and four-sided reinforcement. In traditional three-sided cross-section enlargement reinforcement, generally U-shaped stirrups are used. The U-shaped stirrups need to be welded to the longitudinal bars or stirrups of the original column. After chiseling out the complete longitudinal bars or stirrups and then welding, it is time-consuming and laborious. On-site welding construction is particularly inconvenient, and the welding quality with the original steel bars cannot be guaranteed. When using a new type of closed stirrup casing, if not treated, due to one side not being reinforced and the stirrups being exposed, it is easy to leak slurry when pouring concrete with formwork on three sides, and the interface is uneven. The exposed stirrups on the non-reinforced side also need secondary treatment, which is time-consuming and laborious, and the construction effect is poor.

[0004] There is a patent CN 216239883 U, a new type of rectangular column cross-section enlargement reinforcement structure. During on-site construction, the 70° hooks of the U-shaped stirrups are implanted into the columns on both sides. It is not easy to be inserted into the pre-drilled rebar planting holes, and the construction is difficult. Therefore, a structure column with three-sided enlargement and a construction method thereof that are convenient for construction are proposed. Summary of the Invention

[0005] The main purpose of the present invention is to provide a structure column with three-sided enlargement and a construction method thereof to solve the technical problem that stirrups are not easy to be inserted into the pre-drilled rebar planting holes and the construction is difficult.

[0006] To achieve the above purpose, the present invention provides a construction method for a structure column with three-sided enlargement, including the following steps:

[0007] Chisel off the plaster layers of the three enlarged surfaces and the plaster layer of one original surface of the original structure column to obtain a plaster-removed enlarged surface and a plaster-removed original surface respectively; the enlarged surface is the surface corresponding to the designed enlarged cross-section of the original structure column, and the original surface is the surface corresponding to the designed non-enlarged cross-section of the original structure column;

[0008] Chisel the three plaster-removed enlarged surfaces to make them rough, and set transverse tooth grooves at intervals along the longitudinal direction on the plaster-removed original surface;

[0009] Set reinforcement longitudinal bars by rebar planting outside the plaster-removed enlarged surface and the plaster-removed original surface, and the top of the reinforcement longitudinal bars penetrates through the floor slab for anchoring;

[0010] Set closed stirrups along the transverse tooth grooves, the closed stirrups surround the three plaster-removed enlarged surfaces, are connected to the reinforcement longitudinal bars, and both ends are located in the transverse tooth grooves;

[0011] Reinforcing anchor tie bars are arranged by post-inserting reinforcing bars within the three ash removal amplification surfaces, and the reinforcing anchor tie bars are connected to the post-inserted reinforcing bars of the reinforcing longitudinal bars.

[0012] On one side of the original ash removal surface, high-strength cement mortar is used to hang wire mesh and plaster.

[0013] Formwork is supported around the original structural column and concrete is poured.

[0014] After the concrete solidifies, the formwork is removed and cured to obtain a structure of a structural column with three enlarged sides.

[0015] According to the implementation mode of the present application, in the step of roughening the three ash removal amplification surfaces, the ash removal amplification surfaces are made into pitted or grooved surfaces, the depth of the pitted or grooved surfaces is not less than 6 mm, and the number of pits within an area of 100 mm × 100 mm is not less than 5; the spacing of the grooves is not greater than the closed stirrups or not greater than 200 mm.

[0016] According to the implementation mode of the present application, in the step of roughening the three ash removal amplification surfaces, the corners of the column are knocked off.

[0017] According to the implementation mode of the present application, the depth of the transverse tooth grooves is 10 mm. During the process of setting the transverse tooth grooves, they are longitudinally staggered with the stirrups of the original structural column, and a high-pressure air gun is used to clean the dust.

[0018] According to the implementation mode of the present application, in the step of arranging the reinforcing anchor tie bars by post-inserting reinforcing bars within the three ash removal amplification surfaces, the reinforcing anchor tie bars on two opposite ash removal amplification surfaces are longitudinally staggered.

[0019] According to the implementation mode of the present application, before the step of hanging wire mesh and plastering with high-strength cement mortar on one side of the original ash removal surface, it also includes cleaning the three ash removal amplification surfaces and the original ash removal surface.

[0020] According to the implementation mode of the present application, in the step of supporting formwork around the original structural column and pouring concrete, self-compacting concrete is used for pouring; a floor opening is opened in the floor as a pouring port, and the top of the floor opening is in the shape of a flared opening.

[0021] According to the implementation mode of the present application, the step of anchoring the top of the reinforcing longitudinal bars through the floor includes:

[0022] Chisel off the floor protection layer at the top of the column;

[0023] Arrange steel plates around the original structural column, and the steel plates are welded to each other to form an integral body, and the steel plates are welded to the reinforcing longitudinal bars.

[0024] According to the implementation mode of the present application, after the steel plates and the reinforcing longitudinal bars are fixed by plug welding through holes, they are ground smooth.

[0025] The present application also provides a three-sided enlarged structural column structure obtained by the above construction method.

[0026] In the above three-sided enlarged structural column structure and construction method, through steps such as roughening the surface, implanting steel bars, arranging stirrups and anchor bars, the bonding force between the new and old concretes is enhanced, and the bearing capacity of the structural column is improved. Among them, the transverse tooth grooves facilitate the insertion of both ends of the closed stirrups, making the installation of the closed stirrups relatively convenient. The high-strength cement mortar with wire mesh and plastering increases its bonding with the original structure. The construction method of the above three-sided enlarged structural column structure realizes the efficient reinforcement and cross-section amplification of the existing structural column, improves the construction efficiency and quality, and has clear construction steps, reasonable construction sequence, simple operation, easy implementation, and shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0028] Figure 1 FIG. 13 is a schematic structural diagram of a three-sided enlarged structural column structure according to an embodiment of the present application.

[0029] Figure 2 is Figure 1 A sectional structural diagram along A-A.

[0030] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings.

[0031] 101, steel plate; 102, reinforcement longitudinal bar; 103, original structural beam; 104, reinforced structural column; 105, transverse tooth groove; 106, original structural column; 107, original structural slab; 108, floor opening; 109, reinforcement anchor bar; 110, closed stirrup. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0033] It should be noted that all the directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, in the present invention, the descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0035] Moreover, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those skilled in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0036] The present invention provides a construction method for a three-sided enlarged structural column structure. Refer to Figure 1 and Figure 2 , which includes the following steps:

[0037] S100: Chisel off the plaster layers on the three amplified surfaces and the plaster layer on one original surface of the original structural column 106 to obtain the de-plastered amplified surfaces and the de-plastered original surface respectively; the amplified surfaces are the surfaces corresponding to the designed enlarged cross-section of the original structural column 106, and the original surface is the surface corresponding to the designed non-enlarged cross-section of the original structural column 106.

[0038] After the amplified surfaces of the original structural column 106 are reconstructed, a layer of reinforced concrete structure will be added to the surface. While the surface of the original surface will not have a layer of reinforced concrete structure added. After reinforcement and reconstruction, there will be three amplified surfaces with reinforced concrete structure. The cross-sectional area of the reinforced structural column 104 is increased compared to the original structural column 106, and the bearing capacity is enhanced.

[0039] After chiseling off the plaster layers on the three amplified surfaces and the plaster layer on one original surface, the concrete surface is exposed, and the defects existing on the concrete surface are cleaned to the dense part. This facilitates the subsequent reinforced longitudinal bars 102 and reinforced anchor bars 109 to be firmly combined with the concrete structure of the original structural column 106 by the way of implanting bars. At the same time, the concrete structure of the original structural column 106 is closely combined with the subsequently poured concrete structure.

[0040] S200: Chisel the three de-plastered amplified surfaces to be rough, and set transverse tooth grooves 105 distributed at intervals longitudinally on the de-plastered original surface.

[0041] The roughening setting increases the contact area between the new and old concretes, significantly enhancing the bonding force between the two. On the side without increasing the cross-section, layout lines are drawn according to the stirrup positions on the reinforcement drawing, and transverse grooves 105 are cut out using a saw blade. The number of transverse grooves 105 is multiple, and they are distributed at intervals along the longitudinal direction of the original structural column 106.

[0042] S300: Reinforcement longitudinal bars 102 are arranged by post-inserting bars outside the ash removal amplified surface and the ash removal original surface, and the top of the reinforcement longitudinal bars 102 penetrates through the floor slab for anchoring.

[0043] According to the design drawing, multiple reinforcement longitudinal bars 102 are arranged outside each ash removal amplified surface and ash removal original surface. The bottom of the reinforcement longitudinal bars 102 is fixed by post-inserting bars. The anchoring depth of the reinforcement longitudinal bars 102 and the application of the post-inserting bar adhesive meet the design requirements. The top of the reinforcement longitudinal bars 102 penetrates through the floor slab for anchoring. The reinforcement longitudinal bars 102 do not need to be welded to the steel bars of the original structural column 106, which is more convenient for construction, reduces the welding process in the original reinforcement process, saves time and labor, and also reduces the safety risk.

[0044] S400: Closed stirrups 110 are arranged along the transverse grooves 105. The closed stirrups 110 surround three of the ash removal amplified surfaces, are connected to the reinforcement longitudinal bars 102, and both ends are located within the transverse grooves 105.

[0045] The closed stirrups 110 and the transverse grooves 105 are arranged in one-to-one correspondence. Both ends of the closed stirrups 110 are stuck in the transverse grooves 105, and the other parts surround each reinforcement longitudinal bar 102 in the cross-section and are connected to it, such as being tied and fixed to the reinforcement longitudinal bars 102. And it is arranged to surround three sides along the transverse grooves 105 and is tied to the reinforcement longitudinal bars 102 to form a closed stirrup system. In this way, both ends of the closed stirrups 110 can be stuck in the transverse grooves 105 after being tensioned. Compared with the method of implanting 70° hook bars into the post-inserting bar holes in the prior art, the installation is convenient.

[0046] S500: Reinforcement anchor tie bars 109 are arranged by post-inserting bars within three of the ash removal amplified surfaces, and the reinforcement anchor tie bars 109 are connected to the reinforcement longitudinal bars 102 by post-inserting bars.

[0047] The reinforcement anchor tie bars 109 are obliquely implanted into the amplified surface, such as being connected to the reinforcement longitudinal bars 102 by tying, to enhance the shear resistance. The specific post-inserting bar method of the reinforcement anchor tie bars 109 can refer to the post-inserting bar method of the reinforcement longitudinal bars 102.

[0048] S600: On one side of the ash removal original surface, high-strength cement mortar is used to hang a wire mesh and plaster.

[0049] In the prior art, when using closed stirrups 110 for enclosing, no corresponding measures were taken, the formwork pouring concrete forming effect was poor, and subsequent secondary treatment of the un-reinforced side was also required, which was time-consuming and laborious.

[0050] In this application, on one side of the original ash removal surface, high-strength cement mortar is used to hang wire mesh and plaster, which forms a protection for the closed stirrup 110. The closed stirrup 110 is wrapped inside. After this treatment, the corresponding surface of the original ash removal surface is relatively flat. In this way, when formwork is erected on three sides, the formwork is closely combined with this surface, and it is not easy to leak slurry when pouring concrete. Moreover, the interface is flat, and the amount of treatment at the interface after form removal is greatly reduced or no treatment is required, and the construction effect is good.

[0051] Moreover, this process only advances the process of hanging wire mesh and plastering with high-strength cement mortar without additional engineering quantity. After the old housing area is strengthened, generally, simple decoration is also required. Therefore, although only three sides are strengthened, the original decorative layer on the unstrengthened side still needs to be chiseled off, and the process of hanging wire mesh and plastering with high-strength cement mortar is carried out. This operation avoids the problem of secondary construction when the closed stirrup 110 is sleeved.

[0052] S700: Erect formwork around the original structural column 106 and pour concrete.

[0053] The shape of the formwork corresponds to the shape of the three-sided enlarged structural column structure (referred to as the reinforced structural column 104), and the closed stirrup 110, the reinforced longitudinal bar 102, the reinforced anchor tie bar 109, etc. are wrapped inside.

[0054] S800: After the concrete solidifies, remove the formwork and cure to obtain the three-sided enlarged structural column structure.

[0055] In the above three-sided enlarged structural column structure and construction method, through steps such as roughening, implanting steel bars, setting stirrups and anchor tie bars, the bonding force between the new and old concretes is enhanced, and the bearing capacity of the structural column is improved. Among them, the transverse tooth grooves 105 facilitate the two ends of the closed stirrup 110 to extend into them, making the installation of the closed stirrup 110 more convenient. Hanging wire mesh and plastering with high-strength cement mortar increase its bonding with the original structure. The construction method of the above three-sided enlarged structural column structure realizes the efficient reinforcement and cross-section amplification of the existing structural column, improves the construction efficiency and quality, and has clear construction steps, reasonable construction sequence, simple operation, easy implementation, and shortens the construction period.

[0056] According to the implementation manner of the present application, in the step of roughening the three ash removal amplification surfaces, the ash removal amplification surfaces are punched with pits or grooves, the depth of the pits or grooves is not less than 6 mm, and the number of pits in an area of 100 mm×100 mm is not less than 5; the spacing of the grooves is not greater than the closed stirrup 110 or not greater than 200 mm.

[0057] The pitting density and depth ensure the interface roughness (Ra≥2.5mm), increasing the contact area between the new and old concretes and significantly enhancing the bonding force between the two. Moreover, the reasonable number of pits and groove spacing ensure the uniformity of force and avoid stress concentration.

[0058] In some embodiments, during the step of roughening the three ash removal and amplification surfaces, the corners of the column are knocked off.

[0059] Removing the corners can reduce stress concentration, reduce the risk of crack generation, and improve the reliability of the structure. Moreover, it facilitates construction, making the subsequent formwork support and pouring work smoother and improving the construction quality.

[0060] In some embodiments, referring to Figure 1 and Figure 2 , the depth of the transverse tooth groove 105 is 10mm. During the process of setting the transverse tooth groove 105, it is longitudinally staggered with the stirrups of the original structural column 106, and a high-pressure air gun is used to clean the dust.

[0061] The setting of the transverse tooth groove 105 provides a good anchoring point for the closed stirrup 110, enhancing the connection between the new and old concretes.

[0062] When setting the transverse tooth groove 105 and encountering the original structural stirrups, it is slightly offset upward or downward to avoid interference. Staggering the setting with the stirrups avoids mutual interference during the construction process and ensures the construction quality. This step also achieves clean construction, and the high-pressure air gun is used to clean the dust, ensuring the cleanliness of the construction surface and facilitating the subsequent processes.

[0063] In some embodiments, referring to Figure 1 and Figure 2 , during the step of setting the reinforcement anchor tie bars 109 by implanting bars in the three ash removal and amplification surfaces, the reinforcement anchor tie bars 109 on two opposite ash removal and amplification surfaces are longitudinally staggered.

[0064] When constructing the anchor tie bars on two opposite ash removal and amplification surfaces, mark the bar implanting positions in advance, pay attention to slightly offsetting up and down to avoid collision, and can also avoid stress concentration to ensure the strength.

[0065] In some embodiments, before the step of hanging a steel wire mesh and plastering with high-strength cement mortar on one side of the original ash removal surface, it also includes cleaning the three ash removal and amplification surfaces and the original ash removal surface.

[0066] For example, remove the floating blocks, crushed slag, and powder on the concrete surface, and rinse it clean with pressurized water, allowing the surface of the original component (i.e., the three ash removal and amplification surfaces and the original ash removal surface) to be fully wetted. If there is accumulated water in the concave parts of the component surface, use a linen cloth to absorb it.

[0067] Cleaning the construction surface can remove surface dust and impurities, ensuring the quality of subsequent processes. Moreover, it can enhance bonding: a clean surface is conducive to the bonding of high-strength cement mortar and the original concrete, improving the integrity of the structure.

[0068] In some embodiments, referring to Figure 1 and Figure 2 , in the step of formwork erection around the original structural column 106 and pouring concrete, self-compacting concrete is used for pouring; a floor opening 108 is opened in the floor slab as a pouring port, and the top of the floor opening 108 is in the shape of a flared opening.

[0069] Due to the relatively dense steel bars, it is generally difficult to lower the vibrator, and the concrete is not easy to be compacted. Therefore, self-compacting concrete is used for pouring. Self-compacting concrete has good fluidity and can fill all corners in the formwork by itself without vibration, improving the construction efficiency.

[0070] When pouring concrete by opening a hole in the floor slab, a flared opening is set; it is convenient for pouring: the flared pouring port is convenient for the inflow of concrete, reducing the air resistance during the pouring process and improving the pouring quality.

[0071] In some embodiments, referring to Figure 1 and Figure 2 , the steps for anchoring the top of the reinforcement longitudinal bar 102 through the floor slab (i.e., the original structural slab 107, and when there is an original structural beam 103, it also needs to pass through the original structural beam 103) include:

[0072] Chisel off the floor slab protective layer at the top of the column;

[0073] Arrange steel plates 101 around the original structural column 106, and the steel plates 101 are welded to each other to form a whole, and the steel plates 101 are welded to the reinforcement longitudinal bar 102.

[0074] In the related technology, when strengthening the top floor column, since the original old building floor slab is generally thin and cannot meet the requirements of straight anchoring of steel bars, treatment is also required at the floor slab.

[0075] Referring to the practice in the 13G311-1 atlas and the Code for Design of Strengthening Concrete Structures GB50367-2013, chisel off the floor slab protective layer at the top of the column, pay attention not to damage the original steel bars, place a 100mm wide × 25mm thick steel plate 101 on each side of the column, perform plug welding and grinding with the reinforcement longitudinal bar 102, and weld the four steel plates 101 to each other to form a whole;

[0076] Welding the reinforcement longitudinal bar 102 through the steel plate 101 enhances the connection between the two, improving the integrity of the structure. Moreover, the setting of the steel plate 101 provides a stable platform for welding, ensuring the reliability of the welding quality, guaranteeing the connection with the original structure, and having good strengthening effect.

[0077] In some embodiments, after the steel plate 101 and the reinforcing longitudinal bars 102 are fixed by plug welding through holes, they are ground flat.

[0078] Plug welding through holes can ensure a firm connection between the steel plate 101 and the reinforcing longitudinal bars 102, improving the stability of the structure. Moreover, it makes the surface flat, and the grinding treatment ensures the flatness of the structure surface, which is beneficial to the subsequent processes.

[0079] This application also provides a three-sided enlarged structural column structure obtained by the above construction method. The three-sided enlarged structural column structure obtained by the above construction method has good load-bearing capacity and durability, and is suitable for various building reinforcement projects. The construction method is simple and efficient, and can quickly complete the reinforcement and cross-section amplification of the structural column. The reinforced structural column has good integrity and stability, and can meet higher load requirements. Surface treatment and material selection improve the durability of the structure and extend the service life.

[0080] Generally speaking, the above construction method of the three-sided enlarged structural column structure and the three-sided enlarged structural column structure have the following advantages:

[0081] 1. The construction principle is simple, and the popularization and implementability are strong.

[0082] 2. The reinforcement quality is guaranteed, and the formed appearance effect is good.

[0083] 3. The welding process in the original reinforcement process is reduced, saving time and labor, and also reducing the safety risk.

[0084] 4. The problem of secondary construction when the closed stirrups 110 are sleeved is avoided.

[0085] 5. The steel plate 101 is welded at the top, ensuring the connection with the original structure and good reinforcement effect.

[0086] In the above technical solution of the present invention, the above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A construction method for a three-sided enlarged structural column structure, characterized in that: The following steps are involved: The plaster layers of the three enlarged surfaces and one original surface of the original structural column are chiseled off to obtain the de-plagued enlarged surface and the de-plagued original surface respectively; the enlarged surface is the surface corresponding to the enlarged cross section of the original structural column design, and the original surface is the surface corresponding to the non-enlarged cross section of the original structural column design; The three dust removal enlarged surfaces are roughened, and transverse tooth grooves are arranged on the dust removal original surface at intervals along the longitudinal direction; Reinforced longitudinal bars are arranged outside the deashing enlarged surface and the deashing original surface by planting bars, and the top of the reinforced longitudinal bars penetrates the floor slab for anchoring; Closed stirrups are arranged along the transverse tooth grooves, the closed stirrups surround the three deashing and enlarged surfaces, are connected to the reinforcing longitudinal bars, and have two ends located in the transverse tooth grooves; Reinforcement anchor bars are arranged in the three deashing and enlarged surfaces by planting bars, and the reinforcement anchor bars are connected to the reinforcement longitudinal bars; On the original surface of the deashing, use high-strength cement mortar to hang steel mesh and plaster; Formwork was set up around the original structural columns and concrete was poured; After the concrete solidifies, the formwork is removed and cured to obtain the three-sided enlarged structural column structure.

2. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: In the three steps of roughening the deashing and enlarged surface, the deashing and enlarged surface is punched into pits or grooves, the depth of the pits or grooves is not less than 6 mm, and the number of pits in every 100 mm×100 mm area should not be less than 5; the spacing between the grooves is not greater than the closed stirrups or not greater than 200 mm.

3. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: In the three steps of removing dust, enlarging the surface and roughening, the corners of the column are knocked off.

4. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: The depth of the transverse tooth groove is 10 mm. In the process of setting the transverse tooth groove, the stirrups of the original structural column are staggered in the longitudinal direction, and the dust is cleaned with a high-pressure air gun.

5. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: In the step of arranging reinforcing anchor bars by planting bars in the three deashing and enlarged surfaces, the reinforcing anchor bars on two opposite deashing and enlarged surfaces are staggered in the longitudinal direction.

6. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: Before the steps of hanging steel mesh and plastering with high-strength cement mortar on one side of the original deashing surface, the process also includes cleaning the three deashing amplified surfaces and the original deashing surface.

7. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: In the step of supporting formwork around the original structural columns and pouring concrete, self-compacting concrete is used for pouring; a floor opening is opened in the floor slab as a pouring opening, and the top of the floor opening is in a trumpet shape.

8. The construction method of the three-sided enlarged structural column structure according to claim 1 is characterized in that: The steps of anchoring the top of the reinforced longitudinal reinforcement through the floor slab include: Chisel away the protective layer of the floor on top of the column; A steel plate is arranged around the original structural column, the steel plates are welded to each other to form a whole, and the steel plate is welded to the reinforcing longitudinal reinforcement.

9. The construction method of the three-sided enlarged structural column structure according to claim 8, characterized in that: The side surface of the steel plate is fixed to the reinforcing longitudinal ribs by plug welding and then ground flat; the reinforcing longitudinal ribs are welded to the bottom surface of the steel plate.

10. A three-sided enlarged structural column structure obtained by the construction method according to any one of claims 1 to 9.

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