Preliminary structural column of stepped surface, stepped interface structural column, template and method

Abstract

The present invention provides a formwork for a structural column, a pre-structural column with a stepped surface and a construction method thereof, and a structural column with a stepped interface and a construction method thereof, wherein the pre-structural column with a stepped surface comprises a steel column and a pre-reinforced concrete structure wrapped around the steel column, wherein the pre-reinforced concrete structure comprises pre-concrete, pre-reinforced steel bars embedded in the pre-concrete, and steel sleeves distributed and connected to the pre-reinforced steel bars, wherein the structural surface of the pre-reinforced concrete structure is a stepped surface, wherein the stepped surface is N stepped surfaces, and the first stepped surface to the Nth stepped surface are arranged outwardly from the axial center of the steel column, wherein N≥2. The present invention can form a stepped surface on the structural surface of the pre-structural column, thereby making the interface between the pre-structural column and the post-structural column stepped, thereby improving the combination effect, structural stability and engineering quality of the pre-structural column and the post-structural column.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering, and in particular to a template for a structural column, a preliminary structural column with a stepped surface and a construction method thereof, and a stepped interface structural column and a construction method thereof. Background Art

[0002] The supporting columns in the deep foundation pit reverse construction process are composed of concrete piles and steel columns (or lattice columns). The steel columns are set on the concrete piles to support the deadweight of the upper structure and the construction load before the bottom plate is sealed during the construction process. After the completion of the underground structure, the steel columns wrapped with reinforced concrete structure will serve as the structural columns of the basement. Please refer to Figure 1 to Figure 2 In the construction process of the existing node of one column and one pile, the structural column usually includes a pre-construction structure 20 and a later construction structure 30 which are constructed separately, and the interface 40 between the pre-construction structure 20 and the later construction structure 30 is a plane. The plane structure interface 40 leads to a poor combination effect of the pre-construction structure 20 and the later construction structure 30, thereby affecting the structural stability of the structural column at the interface 40. Since the interface is a plane, the steel sleeve pre-buried in the pre-construction structure for connecting the pre-construction steel bars and the later steel bars will increase the difficulty of connecting the pre-construction steel bars and the later steel bars, and it is easy to enter the mud. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a template for a structural column, a preliminary structural column with a stepped surface and a construction method thereof, and a stepped interface structural column and a construction method thereof, so as to solve the problem of poor bonding effect between the preliminary and subsequent structural columns at the interface.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a formwork for a structural column, the formwork for the structural column, including a stepped structural surface formwork arranged in the radial direction of a steel column, the structural surface formwork is M layers, including a first layer of formwork distributed outwardly perpendicular to the axial center of the steel column and having a center hole with the same diameter as the steel column, and second to M-th layers of formwork located on the first layer of formwork, wherein M≥2; a side formwork extending vertically along the boundary of the structural surface formwork and located on the periphery of the steel column.

[0005] Furthermore, in the formwork for the structural column provided by the present invention, the second layer of formwork to the Mth layer of formwork are rectangular annular plates extending along the boundary of the first layer of formwork toward the axial center direction of the steel column and having successively decreasing areas.

[0006] Furthermore, in the formwork for the structural column provided by the present invention, the first layer of formwork to the Mth layer of formwork are rectangular plates distributed outwardly perpendicular to the axial center of the steel column, with a center hole with the same diameter as the steel column and with decreasing areas.

[0007] Furthermore, in the template for the structural column provided by the present invention, the side template is arranged to extend vertically upward or downward along the boundary of the structural surface template.

[0008] Furthermore, in the formwork of the structural column provided by the present invention, any one of the formworks from the second layer formwork to the M-1 layer formwork is provided with reserved holes distributed corresponding to the steel sleeves.

[0009] The template for the structural column provided by the present invention can form a stepped surface of the structural surface of the early structural column through the stepped structural surface template composed of M layers of templates. Compared with the solution in which the structural surface of the early structural column is a plane, the contact area of ​​the early structural column on its structural surface after construction is increased, so that the interface between the early and late structural columns is a stepped surface rather than a plane, thereby improving the combination effect of the early structural column and the late structural column, improving the structural stability of the early and late structures at the interface, and improving the engineering quality of the early and late structural columns at the construction nodes at the interface.

[0010] In order to solve the above technical problems, another technical solution provided by the present invention is: a preliminary structural column with a stepped surface, including a steel column and a preliminary reinforced concrete structure wrapped around the steel column, the preliminary reinforced concrete structure including preliminary concrete, preliminary steel bars embedded in the preliminary concrete, and steel sleeves distributed and connected to the preliminary steel bars, the structural surface of the preliminary reinforced concrete structure is a stepped surface, the stepped surface is N step surfaces, and along the axial center of the steel column outward are the first step surface to the Nth step surface, where N≥2.

[0011] Furthermore, in the preliminary structural column with stepped surface provided by the present invention, the steel sleeve is longitudinally distributed on any one of the step surfaces from the second step surface to the N-1th step surface.

[0012] Furthermore, in the preliminary structural column with a stepped surface provided by the present invention, the end surface of the steel sleeve located on one side of the structural surface of the preliminary reinforced concrete structure is flush with the stepped surface.

[0013] Furthermore, in the preliminary structural column with a stepped surface provided by the present invention, the end face of the steel sleeve located on one side of the structural surface of the preliminary reinforced concrete structure extends outward along the step surface, and the extension distance of the steel sleeve extending outward is between the step surface where the steel sleeve is located and the previous step surface.

[0014] Furthermore, in the preliminary structural column provided by the present invention, the stepped surface is composed of three stepped surfaces, which are the first step surface, the second step surface and the third step surface in order from the axial center of the steel column outward, and the steel sleeve is longitudinally distributed on the second step surface.

[0015] The stepped surface of the preliminary structural column provided by the present invention has a stepped surface and the number of stepped surfaces is more than two. Compared with the preliminary structural column whose structural surface is a plane, the preliminary structural column has a stepped surface, which increases the contact area with the later structural column. Then, a step shape is formed at the interface between the preliminary structural column and the later structural column, that is, the interface between the structural columns constructed in the previous and subsequent stages is a stepped surface rather than a plane, thereby improving the combination effect of the preliminary structural column and the later structural column, improving the structural stability of the preliminary and subsequent structures at the interface, and improving the engineering quality of the preliminary and subsequent structural columns at the construction nodes at the interface.

[0016] In order to solve the above technical problems, another technical solution provided by the present invention is: a construction method of the pre-structural column with a stepped surface as mentioned above, comprising:

[0017] Construct formwork for structural columns as described above;

[0018] Any one of the second to M-1 layer templates is provided with reserved holes corresponding to the steel sleeves, the steel sleeves are arranged through the reserved holes, and the preliminary steel bars are connected to the steel sleeves;

[0019] Preliminary structural columns with stepped surfaces are formed by pouring preliminary concrete in the formwork.

[0020] The construction method of the preliminary structural column with a stepped surface provided by the present invention can form the preliminary structural column with a stepped surface.

[0021] In order to solve the above technical problems, another technical solution provided by the present invention is: a structural column with a stepped interface, comprising an early structural column with a stepped surface as mentioned above, and a later structural column located above or below the early structural column, wherein the interface between the early structural column and the later structural column is stepped.

[0022] In order to solve the above technical problems, another technical solution provided by the present invention is: a construction method of a structural column of a stepped interface, comprising:

[0023] Construct the preliminary structural columns of the stepped surface as described above;

[0024] Remove the formwork of the early structural columns and construct the formwork of the later structural columns;

[0025] Connecting the later steel bars distributed corresponding to the earlier steel bars through the steel bar sleeves;

[0026] The later structural columns are formed by constructing later concrete in the formwork of the later structural columns, so that the interface between the early structural columns and the later structural columns is stepped.

[0027] Compared with the prior art, the structural columns with stepped interfaces and the construction method thereof provided by the present invention can make the interfaces between the early structural columns and the late structural columns stepped, so that the interfaces between the early and late structural columns are stepped surfaces rather than flat surfaces, thereby improving the combining effect between the early structural columns and the late structural columns, improving the structural stability of the early and late structures at the interfaces, and improving the engineering quality of the early and late structural columns at the construction nodes at the interfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the cross-sectional structure of the template of the prior art structural column;

[0029] Figure 2 It is a schematic diagram of the cross-sectional structure of a structural column in the prior art whose interface is a plane;

[0030] Figure 3 It is a schematic diagram of the planar structure of the structural surface template of an embodiment of the present invention;

[0031] Figure 4 yes Figure 3 Schematic diagram of the plane structure of the first layer of template;

[0032] Figure 5 yes Figure 3 Schematic diagram of the plane structure of the second layer template;

[0033] Figure 6 yes Figure 3 Schematic diagram of the plane structure of the third layer template;

[0034] Figure 7 is a schematic cross-sectional structure diagram of a structural surface template according to an embodiment of the present invention;

[0035] Figure 8 It is a schematic cross-sectional structure diagram of arranging the advance steel bars and steel bar sleeves in the structural surface template of the embodiment of the present invention;

[0036] Fig. 9 It is a schematic cross-sectional structure diagram of pouring concrete in a structural surface template of an embodiment of the present invention;

[0037] Figure 10 to Figure 11 It is a schematic cross-sectional structure diagram of a preliminary structural column with a stepped surface formed after removing the structural surface template of an embodiment of the present invention;

[0038] Fig.12 It is a schematic cross-sectional structure diagram of connecting later steel bars to an early structural column of a stepped surface according to an embodiment of the present invention;

[0039] Fig.13 It is a schematic cross-sectional structure diagram of a hidden steel bar sleeve in a preliminary structural column of a stepped surface according to an embodiment of the present invention;

[0040] Fig.14 yes Fig.13 A partial enlarged view of point D in the middle;

[0041] Fig.15 A schematic diagram of the cross-sectional structure of a structural column where an early structural column of a stepped surface and a later structural column form a stepped interface;

[0042] Fig.16 It is a structural surface template distributed above the interface in an embodiment of the present invention;

[0043] Fig.17 It is a schematic cross-sectional structure diagram of a preliminary structural column formed on a stepped surface of an upper structural surface according to an embodiment of the present invention;

[0044] Fig.18 A schematic diagram of the planar structure of another structural surface template according to an embodiment of the present invention;

[0045] Fig.19 yes Fig.18 The first layer template in;

[0046] Fig. 20 yes Fig.18 The second layer template in ;

[0047] Fig.21 yes Fig.18 The third layer template in;

[0048] Fig. 22 yes Fig.18 A schematic diagram of the cross-sectional structure of the structural surface template in FIG.

[0049] Fig.23 is based on Fig.18 A schematic diagram of the cross-sectional structure of the preliminary structural column of the stepped surface formed by the structural surface template;

[0050] Fig.24 yes Fig.18 A schematic diagram of a planar structure in which the structural surface template is located on the upper structural surface;

[0051] Fig.25 is based on Fig.24 Schematic diagram of the cross-sectional structure of the preliminary structural column with a stepped surface formed by the structural surface template.

[0052] Illustration of the prior art: 10. Steel columns, 20. Early structural columns, 30. Later structural columns, 40. Interfaces; 50. Structural surface formwork, 60. Side formwork.

[0053] The present invention illustrates: 500, structural column, 510, steel column, 520, early steel bar, 530, steel bar sleeve, 540, early concrete, 540a, structural surface, 540b, first step surface, 540c, second step surface, 540d, third step surface, 550, later steel bar, 560, later structural column, 570, interface, 580, early structural column, 600, structural surface formwork, 610, first layer formwork, 611, first center hole, 620, second layer formwork, 621, reserved hole, 622, second center hole, 630, third layer formwork, 631, third center hole, 640, side formwork, 650, cap, 660, plunger. DETAILED DESCRIPTION

[0054] The present invention is described in detail below in conjunction with the accompanying drawings:

[0055] Embodiment 1

[0056] Please refer to Figures 3 to 9 , Fig.16 , Figures 18 to 22 and Fig.24 Embodiment 1 of the present invention provides a formwork for a structural column, the formwork for the structural column comprising a stepped structural surface formwork 600 arranged in the radial direction of a steel column 510, the structural surface formwork 600 being M layers, comprising a first layer of formwork 610 distributed outwardly perpendicular to the axial center of the steel column 510 and having a first center hole 611 with the same diameter as the steel column 510, and second layer of formwork 620 to M-th layer of formwork located on the first layer of formwork 610, wherein M≥2; and a side formwork 640 extending vertically along the boundary of the structural surface formwork 600 and located on the periphery of the steel column 510.

[0057] The template for the structural column provided in the first embodiment of the present invention, through the stepped structural surface template 600 formed by M layers of templates, can make the structural surface of the early structural column form a stepped surface. Compared with the solution in which the structural surface of the early structural column is a plane, the contact area of ​​the early structural column on its structural surface after construction is increased, so that the interface between the early and late structural columns is a stepped surface rather than a plane, thereby improving the combination effect of the early structural column and the late structural column, improving the structural stability of the early and late structures at the interface, and improving the engineering quality of the early and late structural columns at the construction nodes at the interface.

[0058] Please refer to Figures 3 to 9 , Fig.16 , Figures 18 to 22 and Fig.24, the structural surface template 600 in the template of the structural column provided in the first embodiment of the present invention can adopt the following two stacking methods. The M-layer template of the structural surface template 600 in the embodiment of the present invention includes but is not limited to a 3-layer template, and can also be a 2-layer template, a 4-layer template, a 5-layer template, a 6-layer template, etc. The more layers of the template, the more stepped surfaces of the structural surface of the structural column formed, the larger the contact area, the better the combination effect of the early structural column and the later structural column, the better the structural stability of the interface, and the higher the engineering quality.

[0059] Structural surface template stacking method 1:

[0060] Please refer to Figures 3 to 9 and Fig.16 In the first template stacking method, the second layer template 620 to the Mth layer template are rectangular annular plates extending along the boundary of the first layer template 610 toward the axial center direction of the steel column 510 and whose areas decrease successively. Taking the stacking template with M=3 as an example, in the first stacking method, the first layer template 610, the second layer template 620 to the third layer template 630 are rectangular annular plates whose areas decrease successively, and the second layer template 620 and the third layer template are all extending along the boundary of the first layer template 610 toward the axial center direction of the steel column 510. Since they extend along the boundary of the first layer template 610 toward the axial center direction of the steel column 510, the second layer template 620 to the Mth layer template can be quickly positioned through the boundary of the first layer template 610, so as to facilitate the layer-by-layer laying construction of the second layer template 620 and the Mth layer template, thereby quickly forming the stacked M layers of templates in a stepped shape. Please refer to Fig.13 The structural surface template stacking method can form a structural surface with a structural column having a stepped surface with a high center and low edges.

[0061] Structural surface template stacking method 2:

[0062] Please refer to Figures 18 to 22 and Fig.24 In the second structure surface template stacking method, the first layer of templates 610 to the Mth layer of templates are rectangular plates that are distributed outward from the axial center of the steel column 510 and have a center hole with the same diameter as the steel column 510 and the area decreases successively. Take M=3 layers of templates as an example, please refer to Figures 18 to 21 , the first layer template 610 has a first center hole 611, the second layer template 620 has a second center hole 622, and the third layer template 630 has a third center hole 631, wherein the first center hole 611 = the second center hole 622 = the third center hole 631. Please refer to Fig.23In the second structural surface template stacking method, the M-layer templates are all based on the axial center as the starting point, and each layer of templates needs to be aligned with the steel column 511, which can form a structural column of a stepped structural surface with a low center and high edges. Since the M-layer templates of the structural surface template 600 are all provided with a center hole, they can ensure a stable connection with the steel column 510.

[0063] Please refer to Figure 7 and Fig. 22 In the template of the structural column provided in the first embodiment of the present invention, the side template 640 can be vertically extended upward along the boundary of the structural surface template 600. Thus, the construction sequence of the structural columns in the previous stage is carried out from top to bottom.

[0064] Please refer to Fig.16 and Fig.24 In the template of the structural column provided in the first embodiment of the present invention, the side template 640 can be vertically extended downward along the boundary of the structural surface template 600. Thus, the construction sequence of the structural columns in the early stage is carried out from bottom to top.

[0065] The side template 640 of the first embodiment of the present invention can extend in an upward or downward direction, and can be flexibly set according to the space limitations and convenience of the construction environment.

[0066] Please refer to Figure 3 , Figure 5 , Figure 7 , Fig.18 , Fig. 20 and Fig. 22 In the formwork of the structural column provided in the first embodiment of the present invention, any one or more of the second layer formwork 620 to the M-1 layer formwork is provided with reserved holes 621 distributed corresponding to the steel sleeves. The reserved holes 621 are used to locate the position of the steel sleeves. Taking the M=3 layer formwork as an example, the reserved holes 621 are provided on the second layer formwork 620, which can ensure the stability and firmness of the steel sleeves after connecting the steel bars.

[0067] Embodiment 2

[0068] Please refer to Figures 9 to 11 , Figures 13 to 15 and Figure 16 to Figure 17, Embodiment 2 of the present invention provides a preliminary structural column 580 with a stepped surface, including a steel column 510, and a preliminary reinforced concrete structure wrapped around the steel column 510, wherein the preliminary reinforced concrete structure includes preliminary concrete 540, preliminary steel bars 520 embedded in the preliminary concrete 540, and steel sleeves 530 distributed and connected to the preliminary steel bars 520, wherein the structural surface 540a of the preliminary reinforced concrete structure is a stepped surface, and the stepped surface is N stepped surfaces, which are sequentially from the first step surface to the Nth step surface from the axial center of the steel column 510 outward, wherein N≥2. Embodiment 2 of the present invention is described by taking N=3 step surfaces as an example. Among them, the steel sleeve 530 can be a steel connector. Among them Figure 10 to Figure 11 The preliminary structural columns of the stepped surface can be Figures 3 to 9 The structural surface template 600 is constructed and formed. The structural surface 540a of the preliminary reinforced concrete structure refers to the upper end surface or the lower end surface of the preliminary reinforced concrete structure.

[0069] Please refer to Figures 8 to 11 In the step-faced preliminary structural column provided in the second embodiment of the present invention, the steel sleeve 530 is longitudinally distributed on any one or several step surfaces from the second step surface to the N-1 step surface. The longitudinal distribution position of the steel sleeve 530 can make its connection with the steel bar more reliable and stable. Since the steel sleeve 530 is distributed on the middle step surface instead of the first step surface and the Nth step surface, it can prevent mud from pouring into the steel sleeve 530 and avoid clogging. In order to further prevent the steel sleeve 530 from being blocked by mud, please refer to Fig.10 , before pouring concrete 540, the steel sleeve 530 can be protected by the plunger 660; please refer to Fig.11 Before pouring the concrete 540 , the steel sleeve 530 may also be protected by the cap 650 .

[0070] In order to further prevent the steel sleeve 530 from being blocked by mud, the second embodiment of the present invention provides a preliminary structural column with a stepped surface, and the end surface of the steel sleeve 530 located on one side of the structural surface of the preliminary reinforced concrete structure is flush with the stepped surface.

[0071] Please refer to Figure 10 to Figure 11 In order to further prevent the steel sleeve 530 from being blocked by mud, the second embodiment of the present invention provides a pre-structure column with a stepped surface, wherein the end surface of the steel sleeve 530 located on one side of the structural surface of the pre-reinforced concrete structure extends outward along the stepped surface, and the extension distance of the steel sleeve 530 extending outward is located between the stepped surface where the steel sleeve 530 is located and the previous stepped surface. That is, the stepped surface < the extension distance of the steel sleeve 530 ≤ the previous stepped surface.

[0072] Please refer to Figure 13 to Figure 14 In the preliminary structural column provided in the second embodiment of the present invention, the step surface 540a includes but is not limited to three step surfaces, which are the first step surface 540b, the second step surface 540c and the third step surface 540d from the axial center of the steel column 510 to the outside, and the steel sleeve 530 is longitudinally distributed on the step surface of the second step surface 540c.

[0073] The stepped surface of the preliminary structural column provided in the second embodiment of the present invention has two or more stepped surfaces. Compared with the preliminary structural column whose structural surface is a plane, the preliminary structural column has a stepped surface, which increases the contact area with the later structural column. A step shape is formed at the interface between the preliminary structural column and the later structural column, that is, the interface between the structural columns constructed in the previous and subsequent stages is a stepped surface rather than a plane, thereby improving the combination effect of the preliminary structural column and the later structural column, improving the structural stability of the preliminary and subsequent structures at the interface, and improving the engineering quality of the preliminary and subsequent structural columns at the construction nodes at the interface.

[0074] Please refer to Figures 7 to 11 , Figures 13 to 17 , Figures 18 to 25 The second embodiment of the present invention further provides a construction method of the above-mentioned pre-structure column of the stepped surface, comprising:

[0075] Please refer to Figure 7 , Fig.16 , Fig. 22 and Fig.24 , constructing the formwork 600 of the structural column as in the first embodiment above;

[0076] Please refer to Figures 8 to 9 , Fig.12 , Fig.16 , Fig. 22 and Fig.24 , any one of the second layer template 620 to the M-1 layer template or each template is provided with a reserved hole 621 distributed corresponding to the steel sleeve 530, the steel sleeve 530 is arranged through the reserved hole 621, and the preliminary steel bar 520 is connected with the steel sleeve 530;

[0077] Please refer to Figures 9 to 11 , Figures 13 to 17 , Figure 22 to Figure 25 , pouring preliminary concrete 540 in the formwork to form preliminary structural columns with stepped surfaces.

[0078] The construction method of the preliminary structural column with a stepped surface provided in the second embodiment of the present invention can form the preliminary structural column with a stepped surface.

[0079] Embodiment 3

[0080] Please refer to Figures 3 to 25 Embodiment 3 of the present invention provides a structural column 500 with a stepped interface, including an early structural column 580 with a stepped surface as described above, and a later structural column 560 located above or below the early structural column 580, wherein an interface 570 between the early structural column 580 and the later structural column 560 is stepped.

[0081] Please refer to Figures 3 to 25 Embodiment 3 of the present invention further provides a construction method for a structural column of a stepped interface, comprising:

[0082] Please refer to Figures 3 to 14 , Figures 16 to 25 , constructing the preliminary structural columns 580 of the stepped surface as described above;

[0083] Please refer to Figures 10 to 14 , remove the formwork of the early structural columns and construct the formwork of the later structural columns;

[0084] Please refer to Fig.12 , connecting the later steel bars 550 corresponding to the earlier steel bars 520 through the steel bar sleeves 530;

[0085] The later structural column 560 is formed by constructing later concrete in the template of the later structural column, so that the interface 570 between the earlier structural column 580 and the later structural column 560 is stepped.

[0086] The structural columns with stepped interfaces and the construction method thereof provided in the third embodiment of the present invention can make the interfaces between the early structural columns and the late structural columns stepped, so that the interfaces between the early and late structural columns are stepped surfaces rather than flat surfaces, thereby improving the combining effect between the early structural columns and the late structural columns, improving the structural stability of the early and late structures at the interfaces, and improving the engineering quality of the early and late structural columns at the construction nodes at the interfaces.

[0087] The present invention is not limited to the above-mentioned specific embodiments, and all changes made within the claims of the present invention are within the protection scope of the claims of the present invention.

Claims

1. A formwork for a pre-structural column with a stepped surface, characterized in that: It includes setting a stepped structural surface template in the radial direction of the steel column, the structural surface template is a stacked M layers, including a first layer of template distributed outwardly perpendicular to the axial center of the steel column and having a center hole with the same diameter as the steel column, and a second layer of template to an M-th layer of template located on the first layer of template, wherein M≥2, and the stepped structural surface template formed by the M layers of templates can form a stepped surface on the structural surface of the previous structural column; a side template is vertically extended along the boundary of the structural surface template and is located on the periphery of the steel column.

2. The template for the preliminary structural column with a stepped surface as claimed in claim 1, characterized in that: The second to Mth layer of formwork are rectangular annular plates extending along the boundary of the first layer of formwork toward the axial center direction of the steel column and whose areas decrease successively.

3. The template for the preliminary structural column with a stepped surface as claimed in claim 1, characterized in that: The first to Mth layer of formwork are rectangular plates that are distributed outwardly from the axial center of the steel column, have a center hole with the same diameter as the steel column, and have decreasing areas.

4. The template for the preliminary structural column with stepped surface as claimed in claim 1, characterized in that: The side template is extended vertically upward or downward along the boundary of the structural surface template.

5. The template for the preliminary structural column with stepped surface as claimed in claim 1, characterized in that: Any one of the second to M-1 layer templates is provided with reserved holes distributed corresponding to the steel bar sleeves.

6. A construction method for a pre-structure column with a stepped surface, characterized in that: include: A formwork for constructing a preliminary structural column of a stepped surface as claimed in any one of claims 1 to 4; Any one of the second to M-1 layer templates is provided with reserved holes corresponding to the steel sleeves, the steel sleeves are arranged through the reserved holes, and the previous steel bars are connected to the steel sleeves; Preliminary structural columns with stepped surfaces are formed by pouring preliminary concrete within the formwork of the structural columns.

7. A construction method for a structural column with a stepped interface, characterized in that: include: Constructing the preliminary structural columns of the stepped surface as claimed in claim 6; Remove the formwork of the early structural columns and construct the formwork of the later structural columns; Connecting the later steel bars distributed corresponding to the earlier steel bars through the steel bar sleeves; The later structural columns are formed by constructing later concrete in the formwork of the later structural columns, so that the interface between the early structural columns and the later structural columns is stepped.

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