External-support-free steel formwork construction method for large-section ultrahigh-stiffness batter post

Abstract

The invention discloses an external-support-free steel formwork construction method for a large-section ultrahigh-stiffness batter post, and belongs to the technical field of building construction.According to the external-support-free steel formwork construction method, a traditional steel formwork and support method is replaced by the external-support-free steel formwork construction method, a steel column and a formwork system are connected and fixed by additionally arranging a fixing device, a stable supporting system is formed, and the construction efficiency is improved. Due to the fact that the external-support-free steel formwork construction method has the advantages of being convenient to erect and disassemble and convenient to turn over, the functions of improving work efficiency, reducing risks, shortening the construction period, reducing cost, facilitating construction and turning over and the like in large-section stiff inclined column construction can be achieved. The construction problems that due to the fact that a stiff batter post is large in size, high and large in inclination angle, the batter post formwork is difficult to configure and reinforce are effectively solved, and the stiff batter post formwork can adapt to concrete construction of stiff batter posts of different projects, different positions, different sections and different angles.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and particularly relates to a construction method for a large-section super-high rigid inclined column without external support steel formwork. Background Art

[0002] In domestic stadiums, the grandstand of the stadium has gradually started to adopt large-section reinforced concrete inclined columns, which form a stable spatial triangular structure with some inclined beams of the grandstand; the rigid column is a special structural form, which is composed of steel sections and concrete. Because it can achieve a large bearing capacity under the premise of a smaller cross-section and save the facade space, it can be used to improve the space of the roof steel truss structure.

[0003] The traditional construction method for rigid inclined columns is the steel formwork + support method. A load-bearing support is erected around the inclined column with fastener-type scaffolding pipes or disk-type scaffolding pipes. Vertical steel pipe supports perpendicular to the inclined column are added to the inclined surface and connected and fixed to the embedded steel bars on the floor. Steel wire ropes are added for auxiliary bracing at the back. Due to the complex shape of the stadium grandstand, the circumferential beams are basically curved beams, and the radial beams are arranged in a fan shape to meet the requirements of the grandstand shape. As a result, the inclined column support system must be set up separately and cannot share the support system with the grandstand structure. The inclined column support system requires a large space for installation, disassembly and erection, a large amount of work, and is cumbersome in installation and disassembly. It has the disadvantages of low construction efficiency, high safety risks, and great difficulty in controlling the construction period.

[0004] Based on this, the present invention designs a construction method for a large-section super-high rigid inclined column without external support steel formwork to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned disadvantages of the prior art, the present invention provides a construction method for a large-section super-high rigid inclined column without external support steel formwork.

[0006] To achieve the above objectives, the present invention is realized through the following technical solutions: A construction method for a large-section super-high rigid inclined column without external support steel formwork includes the following steps: Step 1: Weld the steel formwork and the channel steel secondary ribs to form a ribbed formwork. After the inclined column steel bars are tied, use a hoisting device to connect four ribbed formworks perpendicular to each other to form a closed rectangle. Step 2: Set channel steel main ribs around the ribbed formwork according to the spacing requirements designed in the construction plan. Temporarily fix the channel steel main ribs and the channel steel secondary ribs with fasteners, and then connect and fix the channel steel main ribs and the channel steel secondary ribs through lock formwork connectors. Step 3: Symmetrically install two groups of channel steel backstays in front of and behind the inclined surface of the inclined column. At the upper end of the channel steel backstay, connect and fix the rigid steel column and the channel steel main rib through the upper end support member on the inclined surface. At the lower end of the channel steel backstay, connect and fix the channel steel backstay and the channel steel main rib through the lower end support member on the inclined surface. Step 4: Install a set of channel steel back braces on the back of the inclined column. At the upper end of the channel steel back braces, connect and fix the stiff steel column and the main channel steel through the upper end support member on the back. At the lower end of the channel steel back braces, support the main channel steel on the concrete column through the lower end support member on the back. Step 5: After the concrete pouring is completed and the strength meets the requirements, remove the support structures on the inclined surface and the back of the inclined column of the inclined column, so that the channel steel back braces and the main channel steel are disconnected, and loosen the bolts between the steel formworks. Use a truck crane or a tower crane to move the steel formworks upward to the next section or transfer them to the next inclined column.

[0007] Furthermore, the said Step 1 further includes the following process: The steel formworks of adjacent ribbed formworks are fixed in cooperation with angle steel, bolts and nuts.

[0008] Furthermore, the clamping member includes a clamping rod connecting steel plate and a clamping rod. When temporarily fixing the main channel steel and the secondary channel steel, first clamp the L-shaped end of the clamping rod in the secondary channel steel, then pass the other end of the clamping rod through the clamping rod connecting steel plate located outside the main channel steel, and tighten the nut on the clamping rod to connect and fix the main channel steel and the secondary channel steel.

[0009] Furthermore, the ends of adjacent main channel steels are all connected and fixed by a formwork locking connector. The formwork locking connector includes a formwork locking pull rod and a formwork locking angle steel connector. When connecting and fixing the main channel steel and the secondary channel steel, first insert a formwork locking angle steel connector through each end of the formwork locking pull rod, then respectively clamp the two formwork locking angle steel connectors on the ends of the adjacent main channel steels, and then tighten the nuts outside the formwork locking angle steel connectors so that the adjacent main channel steels are tightly clamped and fixed by the formwork locking angle steel connectors.

[0010] Furthermore, the upper end support member on the inclined surface includes a steel pull rod and a steel pull rod connecting steel plate. When using the upper end support member, first connect the U-shaped end of the steel pull rod with the flange of the stiff steel column, then pass the other end of the steel pull rod through the steel pull rod connecting steel plate located outside the channel steel back brace, and connect and fix the main channel steel, the channel steel back brace and the stiff steel column through the cooperation of the nut, the steel pull rod and the steel pull rod connecting steel plate.

[0011] Furthermore, several groups of lower end support members on the inclined surface are arranged along the length direction of the channel steel back brace at the lower end of the inclined surface of the inclined column. The lower end support members on the inclined surface include back brace limit members, lower end support blocks on the inclined surface and lower end limit blocks on the inclined surface. The lower end support blocks on the inclined surface are fixedly connected with the back brace limit members, and the lower end limit blocks on the inclined surface are fixedly connected with the channel steel back brace.

[0012] Further, when using the lower end support member of the inclined surface, adjust the position of the back support limiting member on the channel steel back support so that the lower end support block of the inclined surface is stuck on the upper side of the main rib of the channel steel, and the lower end limiting block of the inclined surface supports the lower side of the main rib of the channel steel. Then fix the back support limiting member on the channel steel back support, so that the main rib of the channel steel is fixed by the cooperation of the lower end support block of the inclined surface and the lower end limiting block of the inclined surface, thereby realizing the connection and fixation of the channel steel back support and the main rib of the channel steel.

[0013] Further, the upper end support member on the back surface includes a channel steel support rod and support rod locking members and back support limiting members fixedly installed at both ends thereof. During use, first fix the support rod locking member to the flange of the stiffened steel column, and then fix the back support limiting member to the channel steel back support, thereby realizing the connection and fixation of the stiffened steel column and the main rib of the channel steel.

[0014] Further, a plurality of lower end support members on the back surface are arranged along the length direction of the channel steel back support at the lower end of the inclined column on the back surface. The lowest lower end support member on the back surface includes a back support limiting member, a lower end support steel plate on the back surface, and a lower end support channel steel on the back surface. Both ends of the lower end support channel steel on the back surface are fixedly connected to the back support limiting member and the lower end support steel plate on the back surface respectively, and the lower end support steel plate on the back surface supports on the concrete column; the remaining lower end support members on the back surface include a back support limiting member, a lower end support block on the back surface, and a lower end limiting block on the back surface. The lower end limiting block on the back surface is fixedly connected to the channel steel back support, and the lower end support block on the back surface is fixedly connected to the back support limiting member. The lower end support block on the back surface and the lower end limiting block on the back surface cooperate to fix the main rib of the channel steel from the upper and lower sides of the main rib of the channel steel, thereby realizing the connection and fixation of the channel steel back support and the main rib of the channel steel.

[0015] To better achieve the purpose of the present invention, the present invention also provides a steel formwork for large-section ultra-high stiffened inclined columns without external support.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Structural self-stability: Using the steel column inside the stiffened inclined column as the support structure, and using steel tie rods to connect and fix the steel formwork system to the steel column, realizing the self-stability of the support system, reducing the installation and disassembly workload of the support system, and reducing the safety risk of the installation and disassembly of the support.

[0017] 2. Fully bolted assembly: Both the steel formwork and the support system adopt bolt joints, realizing the assembly of the support system. Components such as formwork, primary and secondary ribs, and support rods are fixedly connected by bolts, and the installation and disassembly can be realized by tightening and loosening the bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Front view of the steel formwork without external support Figure 2 Three - view drawing of the steel formwork Figure 3 Top view of the steel formwork without external support Figure 4 For Figure 3 Enlarged view of the position A in Figure 5 Detail drawing of the connection node of the main rib fastener Figure 6 Detail drawing of the upper support member on the inclined surface Figure 7 Detail drawing of the lower support member on the inclined surface Figure 8 Detail drawing of the upper support member on the back surface Figure 9 For the detail drawing of the lower support member on the back surface Figure 1 ; Figure 10 For the detail drawing of the lower support member on the back surface Figure 2 .

[0020] The labels in the figure respectively represent: 1. Steel formwork; 2. Channel steel secondary rib; 3. Channel steel main rib; 4. Channel steel back brace; 5. Formwork locking connector; 51. Formwork locking tie rod; 52. Formwork locking angle steel connector; 6. Upper support member on the inclined surface; 61. Steel tie rod; 62. Steel tie rod connecting steel plate; 7. Lower support member on the inclined surface; 71. Lower support block on the inclined surface; 72. Lower limit block on the inclined surface; 8. Upper support member on the back surface; 81. Bracing locking part; 811. Outer L - shaped connecting steel plate; 812. Inner L - shaped connecting steel plate; 82. Channel steel bracing; 9. Lower support member on the back surface; 91. Lower support steel plate on the back surface; 92. Lower support channel steel on the back surface; 93. Lower support block on the back surface; 94. Lower limit block on the back surface; 10. Back brace limit part; 101. Limit part connecting steel plate; 102. Limit part through - length bolt; 11. Fastener; 111. Fastener rod connecting steel plate; 112. Fastener rod; 12. Nut; 13. Stiff steel column; 14. Concrete column. Specific implementation mode

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0022] The "left", "right", "front", "rear", "upper", and "lower" mentioned in the following description are oriented in the perspective direction of the front view.

[0023] Embodiment 1: In some embodiments, referring to the Figures 1-10 specification drawings, a construction method for a large-section ultra-high-rigidity inclined column without external support steel formwork includes the following steps: Constructing the steel formwork system: Step 1: As Figures 1-4 shown, the steel formwork 1 and the channel steel secondary rib 2 are welded to form a ribbed formwork. After the inclined column steel bars are tied, four ribbed formworks are perpendicularly connected to each other by using a truck crane or a tower crane to form a closed rectangle. The steel formworks 1 between adjacent ribbed formworks are fixed by using angle steel, bolts, and nuts 12 in cooperation; Step 2: Channel steel main ribs 3 are arranged around the ribbed formwork according to the spacing requirements designed in the construction plan. The channel steel main ribs 3 and the channel steel secondary ribs 2 are temporarily fixed by using clamping parts 11, and then the channel steel main ribs 3 and the channel steel secondary ribs 2 are connected and fixed by using formwork locking connectors 5; As Figure 5 shown, the clamping part 11 includes a clamping rod connecting steel plate 111 and a clamping rod 112. When temporarily fixing the channel steel main rib 3 and the channel steel secondary rib 2, first, the L-shaped end of the clamping rod 112 is clamped inside the channel steel secondary rib 2, and then the other end of the clamping rod 112 passes through the clamping rod connecting steel plate 111 located outside the channel steel main rib 3, and a nut 12 is tightened on the clamping rod 112 to connect and fix the channel steel main rib 3 and the channel steel secondary rib 2, As Figure 3 and Figure 4 shown, the ends of adjacent channel steel main ribs 3 are all connected and fixed by formwork locking connectors 5. The formwork locking connector 5 includes a formwork locking rod 51 and a formwork locking angle steel connector 52. When connecting and fixing the channel steel main rib 3 and the channel steel secondary rib 2, first, a formwork locking angle steel connector 52 is penetrated through each end of the formwork locking rod 51, and then the two formwork locking angle steel connectors 52 are respectively clamped on the ends of adjacent channel steel main ribs 3, and then a nut 12 is tightened outside the formwork locking angle steel connector 52, so that the adjacent channel steel main ribs 3 are clamped and fixed by the formwork locking angle steel connector 52, thereby realizing the connection and fixation of the channel steel main rib 3 and the channel steel secondary rib 2; In this application, the steel formwork system all adopts bolt joints to realize the assembly of the steel formwork system. The installation and removal of the steel formwork 1, the channel steel secondary rib 2, and the channel steel main rib 3 can be realized by loosening and tightening the bolts.

[0024] Constructing the inclined surface support structure of the inclined column: Step 3: Two groups of channel steel back braces 4 are symmetrically installed in front of and behind the inclined surface of the inclined column. At the upper end of the channel steel back brace 4, the stiffening steel column 13 and the channel steel main rib 3 are connected and fixed by an upper inclined surface support member 6, and at the lower end of the channel steel back brace 4, the channel steel back brace 4 and the channel steel main rib 3 are connected and fixed by a lower inclined surface support member 7; As Figure 3 and Figure 6 shown, the upper end support member 6 of the inclined surface includes a steel tie rod 61 and a steel tie rod connecting steel plate 62. When using the upper end support member 6, first connect the U-shaped end of the steel tie rod 61 to the flange of the stiffened steel column 13, then pass the other end of the steel tie rod 61 through the steel tie rod connecting steel plate 62 located outside the channel steel back brace 4, and connect and fix the channel steel main rib 3 and the channel steel back brace 4 to the stiffened steel column 13 through the cooperation of the nut 12, the steel tie rod 61 and the steel tie rod connecting steel plate 62; As Figure 1 and Figure 7 shown, several groups of lower end support members 7 of the inclined surface are arranged along the length direction of the channel steel back brace 4 at the lower end of the inclined column inclined surface. The lower end support member 7 of the inclined surface includes a back brace limiting member 10, an inclined surface lower end support block 71 and an inclined surface lower end limiting block 72. The inclined surface lower end support block 71 is fixedly connected to the back brace limiting member 10, and the inclined surface lower end limiting block 72 is fixedly connected to the channel steel back brace 4; When using the lower end support member 7 of the inclined surface, adjust the position of the back brace limiting member 10 on the channel steel back brace 4 so that the inclined surface lower end support block 71 is stuck on the upper side of the channel steel main rib 3, and the inclined surface lower end limiting block 72 supports the lower side of the channel steel main rib 3, and then fix the back brace limiting member 10 on the channel steel back brace 4, so that the channel steel main rib 3 is fixed by the cooperation of the inclined surface lower end support block 71 and the inclined surface lower end limiting block 72, thereby realizing the connection and fixation of the channel steel back brace 4 and the channel steel main rib 3.

[0025] Build the back support structure of the inclined column: Step 4: Install a group of channel steel back braces 4 on the back of the inclined column, connect and fix the stiffened steel column 13 and the channel steel main rib 3 through the upper end support member 8 on the back at the upper end of the channel steel back brace 4, and support the channel steel main rib 3 on the concrete column 14 through the lower end support member 9 on the back at the lower end of the channel steel back brace 4; As Figure 3 and Figure 8 shown, the upper end support member 8 on the back includes a channel steel support rod 82 and a support rod locking member 81 and a back brace limiting member 10 fixedly installed at both ends thereof. When in use, first fix the support rod locking member 81 to the flange of the stiffened steel column 13, and then fix the back brace limiting member 10 to the channel steel back brace 4, thereby realizing the connection and fixation of the stiffened steel column 13 and the channel steel main rib 3; The support rod locking member 81 includes an outer L-shaped connecting steel plate 811 and an inner L-shaped connecting steel plate 812 respectively arranged on the outer side and the inner side of the flange of the stiffened steel column 13. The outer L-shaped connecting steel plate 811 and the inner L-shaped connecting steel plate 812 are locked and fixed by bolts and nuts, and the inner L-shaped connecting steel plate 812 is fixedly connected to the end of the channel steel support rod 82; As Figure 1 , Figure 9 and Figure 10As shown in the figure, multiple groups of back lower end support members 9 are arranged along the length direction of the channel steel back support 4 at the lower end of the back of the inclined column. The lowest back lower end support member 9 includes a back support limiting member 10, a back lower end support steel plate 91, and a back lower end support channel steel 92. The two ends of the back lower end support channel steel 92 are respectively fixedly connected to the back support limiting member 10 and the back lower end support steel plate 91, and the back lower end support steel plate 91 is supported on the concrete column 14; the remaining back lower end support members 9 include a back support limiting member 10, a back lower end support block 93, and a back lower end limiting block 94. The back lower end limiting block 94 is fixedly connected to the channel steel back support 4, the back lower end support block 93 is fixedly connected to the back support limiting member 10, and the back lower end support block 93 and the back lower end limiting block 94 cooperate to fix the channel steel main rib 3 from the upper and lower sides of the channel steel main rib 3, thereby realizing the connection and fixation of the channel steel back support 4 and the channel steel main rib 3.

[0026] The back support limiting member 10 includes a limiting member connecting steel plate 101 and a limiting member through bolt 102. Two back support limiting members 10 are respectively located on the left and right sides of the channel steel back support 4, and the two back support limiting members 10 are locked and fixed on the channel steel back support 4 through the cooperation of the limiting member through bolt 102 and the nut 12.

[0027] In this application, by implementing Step 3 and Step 4, the internal steel column in the stiff inclined column can be used as a support structure, and the steel formwork system is connected and fixed to the internal steel column in the stiff inclined column by using the steel tie rod 61 and the channel steel brace 82, so as to realize the stability of the support system itself, reduce the installation and removal workload of the support system, and reduce the safety risk of the installation and removal of the support.

[0028] Formwork removal: Step 5: After the concrete is poured and the strength meets the requirements, release the inclined column inclined surface support structure and the inclined column back support structure, so that the channel steel back support 4 and the channel steel main rib 3 are disconnected, and loosen the bolts between the steel formworks 1. Use a truck crane or a tower crane to move the steel formwork 1 upward to the next section or turn it to the next inclined column.

[0029] This application uses the construction method of steel formwork without external support to replace the traditional steel formwork + support method. By adding fixing devices, the steel column is connected and fixed to the formwork system to form a stable support system. Since the construction method of steel formwork without external support has the characteristics of convenient erection and disassembly and convenient turnover, it can realize functions such as improving work efficiency, reducing risks, shortening the construction period, reducing costs, convenient construction, and convenient turnover in the construction of large-section stiff inclined columns, and effectively solves the construction problems of difficult formwork configuration and reinforcement methods for stiff inclined columns caused by large size, high height, and large inclination angle of stiff inclined columns, and can adapt to the concrete construction of stiff inclined columns with different projects, different positions, different cross-sections, and different angles.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A construction method for a steel formwork without external support for large-section super-high rigid inclined columns, characterized in that, It includes the following steps: Step 1: The steel formwork (1) and the channel steel secondary rib (2) are welded to form a ribbed formwork. After the inclined column steel bars are tied up, four ribbed formworks are perpendicularly connected to each other by a hoisting device to form a closed rectangle. Step 2: Channel steel main ribs (3) are arranged around the ribbed formwork according to the spacing requirements designed in the construction plan. The channel steel main ribs (3) and the channel steel secondary ribs (2) are temporarily fixed by clamping parts (11), and then the channel steel main ribs (3) and the channel steel secondary ribs (2) are connected and fixed by formwork locking connectors (5). Step 3: Two groups of channel steel back braces (4) are symmetrically installed in the front and back of the inclined surface of the inclined column. At the upper end of the channel steel back brace (4), the stiff steel column (13) and the channel steel main rib (3) are connected and fixed by the upper end support member (6) on the inclined surface. At the lower end of the channel steel back brace (4), the channel steel back brace (4) and the channel steel main rib (3) are connected and fixed by the lower end support member (7) on the inclined surface. Step 4: A group of channel steel back braces (4) are installed on the back of the inclined column. At the upper end of the channel steel back brace (4), the stiff steel column (13) and the channel steel main rib (3) are connected and fixed by the upper end support member (8) on the back. At the lower end of the channel steel back brace (4), the channel steel main rib (3) is supported on the concrete column (14) by the lower end support member (9) on the back. Step 5: After the concrete is poured and its strength meets the requirements, the support structures on the inclined surface and the back of the inclined column are removed, so that the channel steel back brace (4) and the channel steel main rib (3) are disconnected, and the bolts between the steel formworks (1) are loosened. The steel formworks (1) are lifted upward to the next section or transferred to the next inclined column by a truck crane or a tower crane.

2. The construction method of the steel formwork for super-high stiffness inclined columns with large cross-sections without external supports according to claim 1, characterized in that, The said Step 1 further includes the following process: The steel formworks (1) of adjacent ribbed formworks are fixed by cooperating with angle steel, bolts and nuts (12).

3. The construction method of the steel formwork for the large-section super-high-rigidity inclined column without external support according to claim 1, characterized in that, The clamping part (11) includes a clamping rod connecting steel plate (111) and a clamping rod (112). When temporarily fixing the channel steel main rib (3) and the channel steel secondary rib (2), first, the L-shaped end of the clamping rod (112) is clamped inside the channel steel secondary rib (2), and then the other end of the clamping rod (112) passes through the clamping rod connecting steel plate (111) located outside the channel steel main rib (3). A nut (12) is tightened on the clamping rod (112) to connect and fix the channel steel main rib (3) and the channel steel secondary rib (2).

4. The construction method of the steel formwork for the large-cross-section ultra-high-rigidity inclined columns without external supports according to claim 1, characterized in that, The ends of adjacent channel steel main ribs (3) are all connected and fixed by formwork locking connectors (5). The formwork locking connector (5) includes a formwork locking rod (51) and a formwork locking angle steel connector (52). When connecting and fixing the channel steel main rib (3) and the channel steel secondary rib (2), first, a formwork locking angle steel connector (52) is penetrated through each end of the formwork locking rod (51). Subsequently, the two formwork locking angle steel connectors (52) are respectively clamped on the ends of adjacent channel steel main ribs (3), and then nuts (12) are tightened outside the formwork locking angle steel connectors (52) so that the adjacent channel steel main ribs (3) are held and fixed by the formwork locking angle steel connectors (52).

5. The construction method of the steel formwork for the large-section ultra-high-rigidity inclined column without external support according to claim 1, characterized in that The upper end support member (6) of the inclined surface includes a steel tie rod (61) and a steel tie rod connecting steel plate (62). When using the upper end support member (6), first connect the U-shaped end of the steel tie rod (61) to the flange of the stiffened steel column (13), then pass the other end of the steel tie rod (61) through the steel tie rod connecting steel plate (62) located outside the channel steel back brace (4), and cooperate with nuts (12), the steel tie rod (61) and the steel tie rod connecting steel plate (62) to connect and fix the channel steel main rib (3) and the channel steel back brace (4) to the stiffened steel column (13).

6. The construction method of the steel formwork for the large-section ultra-high-rigidity inclined column without external support according to claim 1, characterized in that, Several groups of lower end support members (7) of the inclined surface are arranged along the length direction of the channel steel back brace (4) at the lower end of the inclined column inclined surface. The lower end support member (7) of the inclined surface includes a back brace limiting member (10), an inclined surface lower end support block (71) and an inclined surface lower end limiting block (72). The inclined surface lower end support block (71) is fixedly connected to the back brace limiting member (10), and the inclined surface lower end limiting block (72) is fixedly connected to the channel steel back brace (4).

7. The construction method of the steel formwork for the large-section super-high stiffness inclined column without external support according to claim 6, characterized in that, When using the lower end support member (7) of the inclined surface, adjust the position of the back brace limiting member (10) on the channel steel back brace (4) so that the inclined surface lower end support block (71) is stuck on the upper side of the channel steel main rib (3), and the inclined surface lower end limiting block (72) supports the lower side of the channel steel main rib (3), and then fix the back brace limiting member (10) on the channel steel back brace (4), so that the channel steel main rib (3) is fixedly connected by the cooperation of the inclined surface lower end support block (71) and the inclined surface lower end limiting block (72), thereby realizing the connection and fixation of the channel steel back brace (4) and the channel steel main rib (3).

8. The construction method of the steel formwork for the large-section super-high-rigidity inclined column without external support according to claim 1, characterized in that The upper end support member (8) on the back includes a channel steel support rod (82) and a support rod locking member (81) and a back brace limiting member (10) fixedly installed at both ends thereof. When in use, first fix the support rod locking member (81) to the flange of the stiffened steel column (13), and then fix the back brace limiting member (10) to the channel steel back brace (4), thereby realizing the connection and fixation of the stiffened steel column (13) and the channel steel main rib (3).

9. The construction method of the steel formwork for large-section super-high-rigidity inclined columns without external supports according to claim 1, characterized in that, Multiple groups of lower end support members (9) on the back are arranged along the length direction of the channel steel back brace (4) at the lower end of the channel steel back brace (4) on the back of the inclined column. The lowest lower end support member (9) on the back includes a back brace limiting member (10), a lower end support steel plate (91) on the back and a lower end support channel steel (92) on the back. Both ends of the lower end support channel steel (92) on the back are fixedly connected to the back brace limiting member (10) and the lower end support steel plate (91) on the back respectively, and the lower end support steel plate (91) on the back supports on the concrete column (14); the remaining lower end support members (9) on the back include a back brace limiting member (10), a lower end support block (93) on the back and a lower end limiting block (94) on the back. The lower end limiting block (94) on the back is fixedly connected to the channel steel back brace (4), the lower end support block (93) on the back is fixedly connected to the back brace limiting member (10), and the lower end support block (93) on the back and the lower end limiting block (94) on the back cooperate to fix the channel steel main rib (3) from the upper and lower sides of the channel steel main rib (3), thereby realizing the connection and fixation of the channel steel back brace (4) and the channel steel main rib (3).

10. A steel formwork for large-section super-high rigid inclined columns without external support, obtained by using the construction method according to any one of claims 1-9.

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