A high-thin-wall reinforced concrete structure and construction method for preventing overturning

Abstract

The present invention discloses a high-thin-wall reinforced concrete structure that is anti-overturning, comprising a steel bar group, an inner frame, an outer frame and a formwork assembly, wherein the connection of the steel bar group is fixedly connected by a threaded sleeve, the inner frame and the outer frame are detachably arranged at a certain distance in the vertical direction on the inner and outer sides of the steel bar group for fixing, a reinforcing cross bar is arranged horizontally between the inner frame and the outer frame, and an oblique tie bar is arranged between the two groups of inner frames and outer frames in the vertical direction, the formwork assembly is installed outside the steel bar group, and a concrete layer is poured inside the formwork assembly. The steel bar group of the present invention is connected by a threaded sleeve, which reduces the center of gravity of the structure, and at the same time, the stability of the structure and the risk of anti-overturning are ensured by reinforcing measures such as the inner frame, the outer frame, the reinforcing cross beam, and the oblique tie bar.

Description

Technical Field

[0001] The invention relates to the field of bridge pier concrete structures, and in particular to an anti-overturning high thin-wall reinforced concrete structure and a construction method. Background Art

[0002] As a common structure of bridge piers, high thin-walled reinforced concrete structure is thin, with a horizontal width of 16.6m, a longitudinal thickness of 1.8m, and a height of 21.5m. Its internal steel bars are arranged in double rows vertically, and the steel bars need to be welded in the vertical direction. If the overlap length requirements of the specification are met, double-sided welding is 5 times the diameter, and single-sided welding is 10 times the diameter. However, the structure is as high as 21.5m. According to the 9.0m main reinforcement extension, the joints are staggered according to 25% of the stressed reinforcement. The main reinforcement is at least 13m higher than the working surface. The overlap part increases the structure, weight, high center of gravity, and great risk of overturning. Summary of the invention

[0003] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a high-thin-wall reinforced concrete structure and construction method that is anti-overturning. The steel bar group is connected by a threaded sleeve, which reduces the center of gravity of the structure. At the same time, reinforcement measures such as an internal skeleton, an external skeleton, reinforced beams, and diagonal tension bars are used to ensure the stability of the structure and prevent the risk of overturning.

[0004] To achieve the above purpose, the technical solution provided by the present invention is:

[0005] A high-thin-wall reinforced concrete structure that is anti-overturning, includes a steel bar group, an inner frame, an outer frame and a formwork assembly. The steel bar group is connected and fixed by a threaded sleeve. The inner frame and the outer frame are detachably arranged on the inner and outer sides of the steel bar group at a certain distance in the vertical direction for fixation. A reinforcing cross bar is arranged horizontally between the inner frame and the outer frame. Diagonal tension bars are arranged between the two groups of inner frames and outer frames in the vertical direction. The formwork assembly is installed outside the steel bar group, and a concrete layer is poured inside the formwork assembly.

[0006] Preferably, the steel bar group uses multiple steel bars as a group, and multiple groups are arranged in multiple rows and enclosed to form a thin-walled square structure. The inner skeleton is arranged on the inner side and is detachably fixed to the steel bar group, and the outer skeleton is arranged around the outer side of the steel bar group and is detachably fixed to the outer side of the steel bar group.

[0007] Preferably, a plurality of reinforcing cross bars are provided at intervals between the inner frame and the outer frame, and the reinforcing cross bars pass through both ends of the inner frame and are fixed to the outer frame.

[0008] Preferably, the inner frame and the outer frame are fixed to the steel bar group at an interval of 4 meters in the vertical direction, the oblique tie bars are cross-fixed to the steel bar group and are located between the two groups of inner frames and outer frames, and the oblique tie bars are fixed to the steel bar group by welding.

[0009] Preferably, steel sheet piles are fixed on the bottom surface of the side surface of the steel bar group, and each group of inner and outer skeletons is provided with a guy rope fixedly connected to the steel sheet piles.

[0010] Preferably, the formwork assembly includes a formwork frame, a formwork and a pull tab, the formwork is fixedly mounted on the formwork frame, the formwork and the formwork frame enclose a steel bar group in four directions to form a casting cavity, and the formwork frames are fixedly connected by pins, the pull tab is installed at the connection of the adjacent formwork frames to connect the formwork frames on opposite sides, and the pull tab jacket located in the casting cavity is provided with an isolation layer, both ends of the pull tab are fixedly connected to the formwork frame by the pins, one end of the pull tab protrudes out of the formwork frame to form a disassembly end, a strip hole is opened on the disassembly end, and a detachable conical pull tab strip is provided in the strip hole, and mounting structures are respectively provided on both sides of the opposing formwork frames, and reinforcing beams are horizontally installed on the mounting structures.

[0011] Preferably, a first mounting hole is provided at the connection between the template frame and the pull tab, and second mounting holes are correspondingly provided at both ends of the pull tab. The two ends of the template frame and the pull tab are fixedly connected by a pin passing through the first mounting hole of the template frame and the second mounting hole of the pull tab, and the lower end of the pin protrudes out of the lower surface of the template frame and is provided with a fixing hole, and a fixing plate with a conical structure is detachably installed in the fixing hole to fix the template frame and the pull tab; the mounting structure includes a mounting portion and a fixing hook fixed to the end of the mounting portion, the mounting portion is fixedly mounted on the fixing plate, and the reinforcing beam is transversely mounted in the fixing hook and abuts against the template frame.

[0012] Preferably, the outer frame is connected in all directions by threaded steel bars and is detachably connected by nuts.

[0013] To achieve the above object, the present invention provides a method for constructing an anti-overturning high thin-wall reinforced concrete structure, comprising the following steps:

[0014] S1. The steel bar group is formed into groups through multiple steel bars and arranged in double rows. The steel bar groups are connected vertically by threaded sleeves.

[0015] S2, installed on the outside of the steel bar group through the formwork assembly and fixed,

[0016] S3, installing the inner frame and the outer frame on the steel bar group above the grinding plate assembly, and a group of inner frame and outer frame are arranged 4 meters apart in the vertical direction, the inner frame is removably installed on the inner side of the steel bar group, and the outer frame is fixed around the outer side of the steel bar group;

[0017] S4. A reinforcing cross bar is arranged transversely between the inner frame and the outer frame, and oblique tie bars are arranged between the two groups of inner frames and the outer frame in the vertical direction, and each group of the outer frame is provided with a cable wind rope fixedly connected with the steel sheet pile, which can play a role in the stability of the structure;

[0018] S5. Pour concrete into the formwork assembly in sections and pour the inclined reinforcement together. After the pouring is completed, disassemble the grinding plate assembly and move it upward for assembly and pouring. At the same time, dismantle the inner frame, outer frame and reinforcing cross bar and move it upward for reuse.

[0019] Preferably, when the template assembly is disassembled and assembled, first, the template frame on one side is installed, and then the isolation layer is installed on the pull tab, and then the pull tab equipped with the isolation layer is installed in the template frame and the installation grooves opened on the template, and a pin is passed through the first installation hole of the template frame and the second installation hole of the pull tab to fix the connection, and then the template frame on the other side is installed, and at the same time, a pin is passed through the first installation hole of the template frame and the second installation hole of the pull tab to fix the connection, and one end of the pull tab with the strip hole protrudes outside the template frame, and the other end of the pull tab is fixed to the installation structure , and a reinforcing beam is horizontally installed on the mounting structure; the middle of the template frame is enclosed to form a pouring cavity, and the steel bar group is located in the pouring cavity, the two ends of the isolation layer in the pull tab are sealed with the inner side of the template, and then the concrete is poured in the pouring cavity; when the template is removed after pouring, the pin is first removed by knocking the fixing sheet at the lower end of the pin, and then the pull tab is clamped in the strip hole and knocked downward to bring the pull tab out. If the pull tab becomes loose, it can be taken out and reused, and after the pull tab is taken out, a gap between the pull tabs will be generated between the template frames to facilitate the removal of the template.

[0020] The beneficial effects of the present invention are:

[0021] 1. The connection of the steel bar group of the high thin-walled concrete structure of the present invention adopts a threaded sleeve fixed connection, which can reduce the center of gravity of the structure and reduce the risk of overturning, and at the same time, the installation and connection are more convenient; in addition, the steel bar group can effectively fix the steel bar group of the high structure through the reinforcement arrangement of the inner frame, the outer frame, the reinforcement beam, the inclined reinforcement and the cable wind rope interval, thereby improving its stability and preventing the risk of overturning;

[0022] 2. The inner frame, outer frame, reinforcement beams and guy ropes of the reinforcement structure of the present invention can be disassembled and reused as the pouring angle of the concrete structure continues to increase.

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a front view of the present invention;

[0026] Figure 2 yes Figure 1 The top view shown;

[0027] Figure 3 yes Figure 1 A schematic diagram of the structure of the middle template assembly in the mold loading state;

[0028] Figure 4 yes Figure 3 Schematic diagram of the structure of the middle template assembly in the demoulding state;

[0029] Figure 5 yes Figure 3 Schematic diagram of the structure of the middle pull tab;

[0030] Figure 6 yes Figure 1 A bridge with a high thin-walled reinforced concrete structure completed by casting.

[0031] The descriptions of the reference numerals in the figures are as follows.

[0032] Rebar group 1, inner skeleton 2, outer skeleton 3, formwork assembly 4, formwork frame 41, formwork 42, pull tab 43, disassembly end 43a, strip hole 43b, second installation hole 43c, casting cavity 44, pin 45, fixing plate 45a, isolation layer 46, pull tab peeling plate 47, installation structure 48, installation part 48a, fixing hook 48b, reinforcement pipe 49, reinforcement cross bar 5, oblique tie rod 6, steel sheet pile 7, cable wind rope 8. DETAILED DESCRIPTION

[0033] In order to explain the technical content, structural features, achieved objectives and effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0034] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] See also Figures 1 to 6 , a high thin-wall reinforced concrete structure that prevents overturning, includes a steel bar group 1, an inner frame 2, an outer frame 3 and a formwork assembly 4. The connection of the steel bar group 1 is fixed by a threaded sleeve, which can lower the center of gravity of the structure and reduce the risk of overturning, and at the same time, the installation and connection are more convenient. The inner frame 2 and the outer frame 3 are detachably arranged on the inner and outer sides of the steel bar group 1 at a certain distance in the vertical direction for fixation, and a reinforcing cross bar 5 is arranged horizontally between the inner frame 2 and the outer frame 3. Diagonal braces 6 are arranged between the two groups of inner frames 2 and outer frames 3 in the vertical direction. The formwork assembly 4 is installed outside the steel bar group 1, and the concrete layer is poured inside the formwork assembly 4. The present invention can effectively fix the steel bar group 1 of the high structure through the arrangement of the inner frame 2, the outer frame 3, the reinforcing cross beam 5 and the diagonal braces 6, improve its stability and prevent the risk of overturning.

[0036] Furthermore, the steel bar group 1 uses multiple steel bars as a group, and multiple groups are arranged in multiple rows and enclosed to form a thin-walled square structure, the inner frame 2 is arranged on the inner side and detachably fixed to the steel bar group 1, and the outer frame 3 is arranged around the outer side of the steel bar group 1 and detachably fixed to the outer side of the steel bar group 1. A plurality of reinforcing cross bars 5 are arranged at intervals between the inner frame 2 and the outer frame 3, and the reinforcing cross bars 5 pass through both ends of the inner frame 2 and are fixed to the outer frame 3.

[0037] In this embodiment, the inner frame 2 and the outer frame 3 are made of No. 14 channel steel, and the reinforcing beams 5 and the inclined tie bars 6 are made of Φ28 steel bars.

[0038] The inner frame 2 and the outer frame 3 are fixed on the steel bar group 1 at an interval of 4 meters in the vertical direction, and the inclined tie bars 6 are cross-fixed on the steel bar group 1 and located between the two groups of inner frames 2 and outer frames 3, and the inclined tie bars 6 are fixed on the steel bar group 1 by welding. Steel sheet piles 7 are fixed on the bottom surface of the side of the steel bar group 1, and each group of inner frames 2 and outer frames 3 is provided with a cable rope 8 fixedly connected to the steel sheet pile 7. The present invention adopts the above structural design to effectively improve the stability of the structure.

[0039] See also Figures 3 to 5 Specifically, the template assembly 4 includes a template frame 41, a template 42 and a pull tab 43. The template 42 is fixedly mounted on the template frame 41. The template 42 and the template frame 41 enclose the steel bar group 1 in four directions to form a casting cavity 44. The template frames 41 are fixedly connected by pins 45. When used for molding, the template frame 41 is used as an assembly unit and can be assembled according to different molding areas, which has strong flexibility. The pull tab 43 is installed at the connection of the adjacent template frames 41 to connect the template frames 41 on the opposite sides, and the pull tab 43 located in the casting cavity 44 is provided with an isolation layer 46. This structural design can prevent the pull tab 43 from being adhered to the concrete when the pull tab 43 is removed, so as to facilitate disassembly and repeated use. The two ends of the pull tab 43 are fixedly connected to the template frame 41 through the pin 45, and one end of the pull tab 43 protrudes out of the template frame 41 to form a disassembly end 43a. The disassembly end 43a is provided with a strip hole 43b, and a detachable tapered pull tab strip 47 is provided in the strip hole 43b. When the pull tab 43 is disassembled, the pull tab 43 can be disassembled by pressing the pull tab strip 47 downward in the strip hole 43b and taking out the pull tab 43, so as to be reused. The two sides of the opposing template frame 41 are respectively provided with mounting structures 48, and a reinforcing beam 49 is transversely installed on the mounting structure 48, which can play a role in uniform force on the template during pouring and prevent the template 42 from bulging. In this embodiment, the isolation layer 46 is a plastic sleeve or a light mortar or a demoulding oil, and the two ends of the isolation layer 46 form a seal with the inner side of the template 42 to prevent the pull tab 43 from being unable to be removed due to the contact and solidification of the concrete with the pull tab 43 during concrete pouring.

[0040] A first mounting hole is provided at the connection between the template frame 41 and the pull tab 43, and second mounting holes 43c are correspondingly provided at both ends of the pull tab 43. The template frame 41 and the pull tab 43 are fixedly connected at both ends by a pin 45 that passes through the first mounting hole of the template frame 41 and the second mounting hole 43c of the pull tab 43, and the lower end of the pin 45 protrudes out of the lower surface of the template frame 41 and is provided with a fixing hole, and a fixing piece 45a with a conical structure is detachably installed in the fixing hole to fix the template frame 41 and the pull tab 43. The mounting structure 48 includes a mounting portion 48a and a fixing hook 48b fixed to the end of the mounting portion 48a, the mounting portion 48a is fixedly mounted on the fixing piece 45a, and the reinforcing beam 49 is transversely installed in the fixing hook 48b and abuts against the template frame 41.

[0041] In this embodiment, the outer frame 3 is connected in all directions by threaded steel bars and is detachably connected by nuts. When the formwork is removed after the pouring below is completed for further pouring, the outer frame 3 can be removed and reused.

[0042] A method for constructing an anti-overturning high thin-wall reinforced concrete structure comprises the following steps:

[0043] S1, the steel bar group 1 is formed into groups through multiple steel bars, and is arranged in double rows, and the steel bar groups 1 are connected in the vertical direction by threaded sleeves,

[0044] S2, the template assembly 4 is installed on the outside of the steel bar group 1 and fixed,

[0045] S3, installing the inner frame 2 and the outer frame 3 on the steel bar group 1 above the grinding plate assembly 4, and a set of inner frame 2 and outer frame 3 are arranged at a vertical interval of 4 meters, the inner frame 2 is removably installed on the inner side of the steel bar group 1, and the outer frame 3 is fixed around the outer side of the steel bar group 1;

[0046] S4, a reinforcing cross bar 5 is arranged transversely between the inner frame 2 and the outer frame 3, and an inclined tie bar 6 is arranged between the two groups of inner frames 2 and the outer frames 3 in the vertical direction, and a cable wind rope 8 is arranged on each group of the outer frames 3 and fixedly connected with the steel sheet piles 7, which can play a role in the stability of the structure;

[0047] S5. Pour concrete into the formwork assembly 4 in sections, and pour the inclined reinforcement 6 together. After the pouring is completed, disassemble the grinding plate assembly 4 and move it upward for assembly and pouring. At the same time, dismantle the inner frame 2 and the outer frame 3 and the reinforcing cross bar 5 and move it upward for reuse.

[0048] When the template assembly 4 is disassembled, first, the template frame 41 on one side is installed, and then the isolation layer 46 is installed on the pull tab 43. Then the pull tab 43 with the isolation layer 46 is installed in the installation grooves provided on the template frame 41 and the template 42, and the pin 45 is passed through the first installation hole of the template frame 41 and the second installation hole 43c of the pull tab 43 to be fixedly connected. Then the template frame 41 on the other side is installed, and the pin 45 is passed through the first installation hole of the template frame 41 and the second installation hole 43c of the pull tab 43 to be fixedly connected, and one end of the pull tab 43 with the strip hole 43b protrudes outside the template frame 41. The other end of the pull tab 43 is fixed to the installation structure 48, and a reinforcing beam 49 is transversely installed on the installation structure 48. The middle of the template frame 41 encloses a pouring cavity 4, and the steel bar group 1 is located in the pouring cavity 4. The two ends of the isolation layer 46 in the pull tab 43 form a seal with the inner side of the template 4, and then the concrete is poured in the pouring cavity 4. When the template is disassembled after the pouring is completed, the pin 45 is first removed by knocking the fixing sheet 45a at the lower end of the pin 45, and then the pull tab strip 47 is clamped in the bar hole 43b and knocked downward to bring out the pull tab 43. If the pull tab 43 is loose, it can be taken out and reused. After the pull tab 43 is taken out, a gap between the pull tab 43 will be generated between the template frames 41, so as to facilitate the disassembly of the template 1.

[0049] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention. Other devices that are the same or similar to the above are all within the protection scope of the present invention.

Claims

1. A method for constructing a high-thin-wall reinforced concrete structure to prevent overturning, characterized in that: The anti-overturning high thin-wall reinforced concrete structure comprises a steel bar group (1), an inner frame (2), an outer frame (3) and a formwork assembly (4), wherein the steel bar group (1) is connected by a threaded sleeve for fixed connection, the inner frame (2) and the outer frame (3) are detachably arranged at a certain distance in the vertical direction on the inner side and the outer side of the steel bar group (1) for fixed connection, a reinforcing cross bar (5) is arranged transversely between the inner frame (2) and the outer frame (3), and oblique tie bars (6) are arranged between the two groups of inner frames (2) and outer frames (3) in the vertical direction, the formwork assembly (4) is installed outside the steel bar group (1), and a concrete layer is poured inside the formwork assembly (4); The steel bar group (1) uses a plurality of steel bars as a group, and the plurality of groups are arranged in multiple rows and enclosed to form a thin-walled square structure, the inner frame (2) is arranged on the inner side and is detachably fixed to the steel bar group (1), and the outer frame (3) is arranged around the outer side of the steel bar group (1) and is detachably fixed to the outer side of the steel bar group (1); A plurality of reinforcing cross bars (5) are provided at intervals between the inner frame (2) and the outer frame (3), and the reinforcing cross bars (5) pass through both ends of the inner frame (2) and are fixed to the outer frame (3); The inner frame (2) and the outer frame (3) are fixed to the steel bar group (1) at an interval of 4 meters in the vertical direction, the inclined tie bars (6) are fixed to the steel bar group (1) in a cross-shaped manner and are located between the two groups of inner frames (2) and outer frames (3), and the inclined tie bars (6) are fixed to the steel bar group (1) by welding; A steel sheet pile (7) is fixed on the bottom surface of the side of the steel bar group (1), and each group of inner frame (2) and outer frame (3) is provided with a guy rope (8) fixedly connected to the steel sheet pile (7); The template assembly (4) comprises a template frame (41), a template (42) and a pull tab (43); the template (42) is fixedly mounted on the template frame (41); the template (42) and the template frame (41) enclose a steel bar group (1) in four directions to form a casting cavity (44); the template frames (41) are fixedly connected via pins (45); the pull tab (43) is mounted at the connection between adjacent template frames (41) to connect the template frames (41) on opposite sides; and the pull tab (43) is located outside the casting cavity (44). An isolation layer (46) is sleeved, two ends of the pull tab (43) are fixedly connected to the template frame (41) via the pins (45), one end of the pull tab (43) protrudes out of the template frame (41) to form a disassembly end (43a), a strip hole (43b) is opened on the disassembly end (43a), and a detachable conical pull tab strip (47) is provided in the strip hole (43b), and mounting structures (48) are respectively provided on both sides of the opposing template frames (41), and a reinforcing beam (49) is transversely installed on the mounting structure (48); A first mounting hole is provided at the connection between the template frame (41) and the pull tab (43), and second mounting holes (43c) are correspondingly provided at both ends of the pull tab (43). The template frame (41) and the pull tab (43) are fixedly connected at both ends by a pin (45) passing through the first mounting hole of the template frame (41) and the second mounting hole (43c) of the pull tab (43), and the lower end of the pin (45) protrudes out of the lower surface of the template frame (41) and is provided with a fixing hole, and a conical structure is detachably installed in the fixing hole. The fixing plate (45a) of the structure fixes and connects the template frame (41) and the pull tab (43); the mounting structure (48) comprises a mounting portion (48a) and a fixing hook (48b) fixed to the end of the mounting portion (48a), the mounting portion (48a) is fixedly mounted on the fixing plate (45a), the reinforcing beam (49) is transversely mounted in the fixing hook (48b) and abuts against the template frame (41); the outer frame (3) is connected in all directions by threaded steel bars and is movably connected by nuts and is detachable; The anti-overturning high thin-wall reinforced concrete structure construction method includes the following steps: S1. The steel bar group (1) is formed into groups by using a plurality of steel bars and arranged in double rows. The steel bar groups (1) are connected in the vertical direction by threaded sleeves. S2, is installed on the outside of the steel bar group (1) and fixed by means of a formwork assembly (4), S3, installing an inner frame (2) and an outer frame (3) on a steel bar group (1) above a formwork assembly (4), and a set of inner frames (2) and outer frames (3) are arranged at intervals of 4 meters in the vertical direction, the inner frame (2) being detachably installed on the inner side of the steel bar group (1), and the outer frame (3) being fixed around the outer side of the steel bar group (1); S4, a reinforcing cross bar (5) is arranged transversely between the inner frame (2) and the outer frame (3), an oblique tie bar (6) is arranged between the two groups of inner frames (2) and outer frames (3) in the vertical direction, and a guy rope (8) is arranged on each group of outer frames (3) and fixedly connected to the steel sheet piles (7), so as to ensure the stability of the structure; S5, pouring concrete into the formwork assembly (4) to achieve segmented pouring, pouring the inclined tie bars (6) together, and after the pouring is completed, disassembling the formwork assembly (4) and moving it upwards for assembly and pouring, while dismantling the inner frame (2) and the outer frame (3) and the reinforcing cross bar (5) and moving it upwards for reuse; When the template assembly (4) is disassembled, first, the template frame (41) on one side is installed, and then the isolation layer (46) is installed on the pull tab (43), and then the pull tab (43) equipped with the isolation layer (46) is installed in the installation grooves provided on the template frame (41) and the template (42), and is fixedly connected by passing a pin (45) through a first installation hole of the template frame (41) and a second installation hole (43c) of the pull tab (43), and then the template frame (41) on the other side is installed, and at the same time, the pin (45) is passed through the first installation hole of the template frame (41) and the second installation hole (43c) of the pull tab (43) and is fixedly connected, and one end of the pull tab (43) having the strip hole (43b) protrudes outside the template frame (41), and the other end of the pull tab (43) is fixed to the template frame (41). The mounting structure (48) is provided with a reinforcing beam (49) transversely mounted on the mounting structure (48); the middle of the template frame (41) is enclosed to form a casting cavity, and the steel bar group (1) is located in the casting cavity, and both ends of the isolation layer (46) in the pull tab (43) are sealed with the inner side of the template, and then the concrete is cast in the casting cavity; when the template is removed after the casting is completed, the pin (45) is first removed by knocking the fixing sheet (45a) at the lower end of the pin (45), and then the pull tab stripping sheet (47) is clamped in the bar hole (43b) and knocked downward to bring the pull tab (43) outward, and when the pull tab (43) becomes loose, the pull tab (43) can be removed and reused, and after the pull tab (43) is removed, a gap of the pull tab (43) is generated between the template frames (41) to facilitate the removal of the template.

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