A cast-in-situ cantilever structure formwork system

Abstract

The application discloses a cast-in-situ cantilever structure formwork system, and has the technical scheme as follows: a cantilever frame is fixed on a non-cantilever part of a house, the cantilever frame partially extends from the non-cantilever part of the house; an outer extending steel bar is deeply buried at the end side of the non-cantilever part of the house; a steel bar cage is bound at the outer extending steel bar; two groups of steel suspension beams are deeply buried at the end side of the non-cantilever part of the house; a formwork assembly is fixed on the cantilever frame; and concrete is poured in the formwork assembly; the cast-in-situ cantilever structure formwork system has the advantage of reliable structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building, in particular to a cast-in-place cantilever structure formwork system. BACKGROUND

[0002] Modern buildings often use high-altitude large cantilever method to meet the needs of use function and modeling beauty. For example, the large-span atrium of public buildings and super high-rise commercial and residential buildings sometimes has a height of dozens of floors to achieve the effect of open, transparent and broad view; high-rise and super high-rise residential buildings have a structure cantilevered out of the building plane by several meters to highlight the personality of the building. The construction characteristics of cantilever structure are large span, high height, large construction load and high construction difficulty. Therefore, it is of great practical significance to improve the high-altitude large cantilever structure and its construction method.

[0003] The existing Chinese patent with publication number CN110397165A discloses a cantilever structure and a construction method, which comprises a cantilever beam, a skeleton embedded in the cantilever beam, the skeleton extending along the length direction of the cantilever beam, the skeleton being a hollow shell, and the cross section of the skeleton being "H" shape. It also comprises a fixed seat, the upper end of the fixed seat being embedded in the cantilever beam, the lower end of the fixed seat being embedded in the building and being fixedly connected with the building, and the skeleton being fixedly connected with the fixed seat.

[0004] The cantilever structure and the construction method have the advantage of high stability of the cantilever structure; however, the cantilever structure and the construction method still have some disadvantages, such as using many steel pipes for support, large cantilever stress, and difficult formwork support. SUMMARY

[0005] In view of the problems mentioned in the background, the purpose of the present application is to provide a cast-in-place cantilever structure formwork system to solve the problems mentioned in the background.

[0006] The above technical purpose of the present application is achieved by the following technical scheme:

[0007] A cast-in-place cantilever structure formwork system comprises:

[0008] A cantilever frame fixed on the non-cantilever part of a house, the cantilever frame partially extending out of the non-cantilever part of the house;

[0009] An outer steel bar deeply buried at the end side of the non-cantilever part of the house;

[0010] A steel reinforcement cage bound to the outer steel bar;

[0011] Two groups of steel suspension beams deeply buried at the end side of the non-cantilever part of the house;

[0012] A formwork assembly fixed on the cantilever frame;

[0013] and concrete poured inside the formwork assembly.

[0014] Preferably, the cantilever frame includes a steel frame, a plurality of connecting plates and a plurality of fastening columns, and the plurality of connecting plates are respectively fixed to the non-cantilevered parts of the house through the fastening columns.

[0015] Preferably, the steel frame is formed by welding and fixing a plurality of channel steels, a plurality of H-shaped steels, or a plurality of flat steels.

[0016] Preferably, a plurality of structural reinforcement rods are fixed between the two groups of steel suspension beams by rivets.

[0017] Preferably, the steel cantilever beam is one of H-shaped steel, T-shaped steel and channel steel.

[0018] Preferably, the template assembly includes a first 匚-shaped template, a second 匚-shaped template and a pouring port, the first 匚-shaped template is fixed to the cantilever frame by a plurality of rivets, the second 匚-shaped template is fixed to the first 匚-shaped template by a plurality of rivets, and the pouring port is opened on the second 匚-shaped template.

[0019] The present invention also provides a method for casting a cast-in-place cantilever structure formwork system, which specifically comprises the following steps:

[0020] S1. Install a cantilever frame at the bottom of the non-cantilevered portion of the house. When installing the cantilever frame, use a drill gun to fix the fastening column on the connecting piece to the bottom of the non-cantilevered portion of the house, and install the steel frame;

[0021] S2. Tie the steel cage with the overhanging steel bars reserved for pouring the non-cantilevered part of the house, and use the cantilever frame to provide support when tying the steel cage;

[0022] S3. The two groups of steel beams are tested for flaw detection to detect whether there are cracks;

[0023] S4 between the two sets of steel beams fixed with rivets to the structural reinforcement rod, and the use of cantilever frame as an operating support;

[0024] S5. Installing the formwork assembly, first clean the first and second 匚-shaped formwork in the formwork assembly, then fix the first 匚-shaped formwork in the formwork assembly to the cantilever frame with rivets, then snap the second 匚-shaped formwork onto the exterior of the first 匚-shaped formwork, and fix the first and second 匚-shaped formwork with rivets;

[0025] S6. Pour concrete into the formwork assembly and perform compaction operation during pouring;

[0026] S7. Curing the concrete within the cantilevered casting formwork;

[0027] S8. First remove the formwork assembly, and then disassemble the cantilever frame.

[0028] Preferably, before S1, a scaffold is erected, a safety net is hung, and a springboard is laid. The scaffold is a climbing scaffold, the safety net is hung to cover the bottom and sides of the cantilever frame, and the springboard is fixed to the scaffold.

[0029] Preferably, 1-2 hours after the concrete pouring in S6 is completed, the concrete is connected to a heating wire to electrically heat the concrete to prevent frostbite or cracking of the concrete; the electric heating is stopped after the concrete reaches the design strength, and the cooling rate of the concrete when the electric heating is stopped is less than 4°C / h. When the concrete reaches room temperature, it is covered with plastic film and cured with boiling water, and the curing time is not less than 14 days.

[0030] Preferably, in step S3, when performing flaw detection on the two groups of the section steel cantilever beams, the flaw detection equipment used is an ultrasonic flaw detector, and after flaw detection on the two groups of the section steel cantilever beams, the protruding steel bars are flaw detected.

[0031] In summary, the present invention mainly has the following beneficial effects:

[0032] 1. This cast-in-place cantilever structure formwork system has the advantage of structural reliability. During construction, due to the reserved external reinforcement at the end of the non-cantilever part of the house, a steel cage is tied to the external reinforcement, and two sets of steel beams are deeply buried at the end of the non-cantilever part of the house, the combined effect of the external reinforcement, steel cage and steel beam can greatly improve the structural strength, bending and torsional modulus of the cantilever beam, thereby extending the service life of the cantilever beam.

[0033] 2. The casting method of this cast-in-place cantilever structure formwork system has the advantages of simple process and easy operation; by installing a cantilever frame on the non-cantilevered part of the cast-in-place house, the formwork components can be easily fixed, and the use of steel pipes to support the formwork components can be avoided, thus avoiding cantilever stress, increasing the speed of construction, and optimizing and improving the traditional construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is one of the structural diagrams of the formwork system for cast-in-place cantilever structures;

[0035] Figure 2 This is the second structural diagram of the formwork system of cast-in-place cantilever structure;

[0036] Figure 3 It is a structural diagram of the formwork system of the cast-in-place cantilever structure after the formwork components and concrete are hidden.

[0037] Figure numerals: 1. Non-cantilevered part of the house; 2. Cantilever frame; 3. Protruding steel bars; 4. Steel cage; 5. Steel beam; 6. Formwork assembly; 21. Steel frame; 22. Connecting plate; 23. Fastening column; 7. Structural reinforcement rod; 61. First 匚-shaped formwork; 62. Second 匚-shaped formwork; 63. Casting mouth. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Example 1

[0040] refer to Figures 1 to 3 , a cast-in-place cantilever structure formwork system, mainly including the following parts:

[0041] A cantilever frame 2 is fixed to a non-cantilevered portion 1 of a house, wherein a portion of the cantilever frame 2 extends out of the non-cantilevered portion 1 of the house;

[0042] The extended steel bars 3 are deeply buried at the end side of the non-cantilevered part 1 of the building;

[0043] A steel cage 4 tied to the protruding steel bars 3;

[0044] Two sets of steel cantilever beams 5 deeply buried at the end side of the non-cantilevered part 1 of the building;

[0045] Install the formwork assembly 6 fixed on the cantilever frame 2;

[0046] and the concrete poured inside the formwork assembly 6 .

[0047] refer to Figures 1 to 3 , wherein, the cantilever frame 2 includes a steel frame 21, a plurality of connecting plates 22 and a plurality of fastening columns 23, wherein the plurality of connecting plates 22 are respectively fixed to the non-cantilevered part 1 of the house through the fastening columns 23, and the cantilever frame 2 can be conveniently fixed by fixing the fastening columns 23 to the non-cantilevered part 1 of the house; wherein, the steel frame 21 is formed by welding and fixing a plurality of channel steels, and when the steel frame 21 is welded with channel steels, its bending and torsional resistance are good; wherein, a plurality of structural reinforcement rods 7 are installed and fixed between the two groups of steel cantilever beams 5 by rivets to increase the structural strength of the cantilever beams.

[0048] refer to Figures 1 to 3, wherein the steel cantilever beam 5 is H-shaped steel, which has excellent mechanical properties and is reasonably priced; wherein the formwork assembly 6 includes a first ⌚-shaped formwork 61, a second ⌚-shaped formwork 62 and a pouring port 63, wherein the first ⌚-shaped formwork 61 is fixed to the cantilever frame 2 by a plurality of rivets, wherein the second ⌚-shaped formwork 62 is fixed to the first ⌚-shaped formwork 61 by a plurality of rivets, and the pouring port 63 is opened on the second ⌚-shaped formwork 62, and the formwork assembly 6 is constructed using the first ⌚-shaped formwork 61 and the second ⌚-shaped formwork 62, which has the advantage of being simple.

[0049] Analysis shows that: this cast-in-place cantilever structure formwork system has the advantage of structural reliability. During construction, since an overhanging steel bar 3 is reserved at the end side of the non-cantilevered part 1 of the house, a steel cage 4 is tied to the overhanging steel bar 3, and two groups of steel cantilever beams 5 are deeply buried at the end side of the non-cantilevered part 1 of the house, the combined action of the overhanging steel bar 3, the steel cage 4 and the steel cantilever beam 5 can greatly improve the structural strength, bending and torsional modulus of the cantilever beam, thereby increasing the service life of the cantilever beam.

[0050] Example 2

[0051] refer to Figures 1 to 3 , a cast-in-place cantilever structure formwork system, mainly including the following parts:

[0052] A cantilever frame 2 is fixed to a non-cantilevered portion 1 of a house, wherein a portion of the cantilever frame 2 extends out of the non-cantilevered portion 1 of the house;

[0053] The extended steel bars 3 are deeply buried at the end side of the non-cantilevered part 1 of the building;

[0054] A steel cage 4 tied to the protruding steel bars 3;

[0055] Two sets of steel cantilever beams 5 deeply buried at the end side of the non-cantilevered part 1 of the building;

[0056] Install the formwork assembly 6 fixed on the cantilever frame 2;

[0057] and the concrete poured inside the formwork assembly 6 .

[0058] refer to Figures 1 to 3 , wherein, the cantilever frame 2 includes a steel frame 21, a plurality of connecting plates 22 and a plurality of fastening columns 23, wherein the plurality of connecting plates 22 are respectively fixed to the non-cantilevered part 1 of the house through the fastening columns 23, and the cantilever frame 2 can be conveniently fixed by fixing the fastening columns 23 to the non-cantilevered part 1 of the house; wherein, the steel frame 21 is formed by welding and fixing a plurality of H-shaped steels. When the steel frame 21 is welded with H-shaped steels, its bending and torsional resistance are good; wherein, a plurality of structural reinforcement rods 7 are installed and fixed between the two groups of steel cantilever beams 5 by rivets to increase the structural strength of the cantilever beams.

[0059] refer to Figures 1 to 3, wherein the steel cantilever beam 5 is T-shaped steel, which has excellent mechanical properties and is reasonably priced; wherein the formwork assembly 6 includes a first ⌚-shaped formwork 61, a second ⌚-shaped formwork 62 and a pouring port 63, wherein the first ⌚-shaped formwork 61 is fixed to the cantilever frame 2 by a plurality of rivets, wherein the second ⌚-shaped formwork 62 is fixed to the first ⌚-shaped formwork 61 by a plurality of rivets, and the pouring port 63 is opened on the second ⌚-shaped formwork 62, and the formwork assembly 6 is constructed using the first ⌚-shaped formwork 61 and the second ⌚-shaped formwork 62, which has the advantage of being simple.

[0060] Analysis shows that: this cast-in-place cantilever structure formwork system has the advantage of structural reliability. During construction, since an overhanging steel bar 3 is reserved at the end side of the non-cantilevered part 1 of the house, a steel cage 4 is tied to the overhanging steel bar 3, and two groups of steel cantilever beams 5 are deeply buried at the end side of the non-cantilevered part 1 of the house, the combined action of the overhanging steel bar 3, the steel cage 4 and the steel cantilever beam 5 can greatly improve the structural strength, bending and torsional modulus of the cantilever beam, thereby increasing the service life of the cantilever beam.

[0061] Example 3

[0062] refer to Figures 1 to 3 , which is different from Example 1 in that a method for casting a cast-in-place cantilever structure formwork system is also provided, which specifically includes the following steps:

[0063] S1. Install the cantilever frame 2 at the bottom of the non-cantilevered part of the house 1. When installing the cantilever frame 2, use a drill gun to fix the fastening column 23 on the connecting piece 22 to the bottom of the non-cantilevered part of the house 1, and install the steel frame 21;

[0064] S2. After pouring the non-cantilevered part of the house 1, the reserved overhanging steel bars 3 are tied to the steel cage 4. When tying the steel cage 4, the cantilever frame 2 is used to provide support;

[0065] S3 two sets of steel beams 5 for flaw detection, detect whether there are cracks;

[0066] S4 between the two sets of steel beams 5 with rivets to fix the structural reinforcement rod 7, and use the cantilever frame 2 as an operating support;

[0067] S5. Install the template assembly 6. First, clean the first and second 匚-shaped templates 61 and 62 in the template assembly 6. Then, fix the first 匚-shaped template 61 in the template assembly 6 to the cantilever frame 2 with rivets. Then, engage the second 匚-shaped template 62 with the outside of the first 匚-shaped template 61 and fix the first and second 匚-shaped templates 61 and 62 with rivets.

[0068] S6 pouring concrete in the formwork assembly 6, performing compaction operation during pouring;

[0069] S7. Curing the concrete in the overhanging pouring formwork;

[0070] S8. Removing the formwork assembly 6 first, and then disassembling the overhanging frame 2.

[0071] Wherein, S1 before setting up the scaffold, full hanging safety net and laying the jump board, the scaffold chooses to climb the scaffold, full hanging safety net covers the bottom and the side of the overhanging frame 2, and the jump board is fixed on the scaffold.

[0072] Wherein, S6 after pouring the concrete for 1h, the concrete is connected to the heating wire for electric heating, so as to prevent the concrete from freezing or cracking; after the concrete reaches the design strength, the electric heating is stopped, and the cooling rate of the concrete is 3℃ / h when the electric heating is stopped; when the concrete reaches the normal temperature, the plastic film and the boiling water curing are used, and the curing time is 15d.

[0073] Wherein, S3 when detecting the two groups of steel cantilever beams 5, the ultrasonic flaw detector is used, and the external reinforcing steel bars 3 are detected after the two groups of steel cantilever beams 5 are detected.

[0074] It can be seen that the pouring method of the cast-in-place overhanging structure formwork system has the advantages of simple process and convenient operation; by installing the overhanging frame 2 on the non-overhanging part 1 of the building after pouring, the fixing of the formwork assembly 6 can be facilitated, the use of steel pipe to support the formwork assembly 6 can be avoided, the overhanging stress can be avoided, the construction speed is increased, and the traditional construction process is optimized and improved.

[0075] Example 4

[0076] Reference Figures 1 to 3 The difference from example 1 is that a pouring method of a cast-in-place overhanging structure formwork system is also provided, which specifically comprises the following steps:

[0077] S1. Installing the overhanging frame 2 at the bottom of the non-overhanging part 1 of the building, fixing the fastening column 23 on the connecting plate 22 to the bottom of the non-overhanging part 1 of the building by using the drill gun, and installing and fixing the steel frame 21;

[0078] S2. Binding the steel cage 4 at the external reinforcing steel bars 3 reserved after pouring the non-overhanging part 1 of the building, and providing support by using the overhanging frame 2 when binding the steel cage 4;

[0079] S3. Detecting the two groups of steel cantilever beams 5 to detect whether there are cracks;

[0080] S4. Fixing the structural reinforcement rod 7 between the two groups of steel cantilever beams 5 by using the rivet, and using the overhanging frame 2 as the operation support;

[0081] S5. Install the formwork assembly 6, first clean the first and second U-shaped formworks 61 and 62 in the formwork assembly 6, then fix the first U-shaped formwork 61 in the formwork assembly 6 on the cantilever frame 2 with rivets, and then engage the second U-shaped formwork 62 outside the first U-shaped formwork 61 and fix the first and second U-shaped formworks 61 and 62 with rivets;

[0082] S6. Pour concrete in the formwork assembly 6, and perform vibration during pouring;

[0083] S7. Maintain the concrete in the cantilever pouring formwork;

[0084] S8. First remove the formwork assembly 6, and then disassemble the cantilever frame 2.

[0085] Before S1, set up a scaffold, hang a safety net, and lay a jump board, the scaffold is a climbing scaffold, the safety net covers the bottom and the side of the cantilever frame 2, and the jump board is fixed on the scaffold.

[0086] After S6, connect the heating wires to the concrete to electrically heat the concrete to prevent freezing or cracking of the concrete, stop the electric heating when the concrete reaches the design strength, and the cooling rate of the concrete is 2℃ / h, and when the concrete reaches room temperature, cover the concrete with plastic film and water curing for 16 days.

[0087] Example 5

[0088] Reference Figures 1 to 3 The difference between the embodiment 1 is that a pouring method of the cast-in-place cantilever structure formwork system is also provided, which specifically includes the following steps:

[0089] S1. Install the cantilever frame 2 at the bottom of the non-cantilever part 1 of the house, fix the fastening column 23 on the connecting plate 22 to the bottom of the non-cantilever part 1 of the house by using a drill gun when installing the cantilever frame 2, and install and fix the profile steel frame 21;

[0090] S2. Bind the steel cage 4 at the reserved external steel bars 3 of the non-cantilever part 1 of the house, and provide support with the cantilever frame 2 when binding the steel cage 4;

[0091] S3. Perform flaw detection on the two groups of profile steel cantilever beams 5 to detect whether there are cracks;

[0092] S4. Fix the structural reinforcement rod 7 between the two groups of profile steel cantilever beams 5 with rivets, and use the cantilever frame 2 as an operating support;

[0093] S5. Install the template assembly 6. First, clean the first and second 匚-shaped templates 61 and 62 in the template assembly 6. Then, fix the first 匚-shaped template 61 in the template assembly 6 to the cantilever frame 2 with rivets. Then, engage the second 匚-shaped template 62 with the outside of the first 匚-shaped template 61 and fix the first and second 匚-shaped templates 61 and 62 with rivets.

[0094] S6 pouring concrete in the formwork assembly 6, performing compaction operation during pouring;

[0095] S7. Curing the concrete in the cantilever casting formwork;

[0096] S8. First remove the formwork assembly 6, and then disassemble the cantilever frame 2.

[0097] Example 6

[0098] refer to Figures 1 to 3 Figures 1 to 3 , which is different from Example 1 in that a method for casting a cast-in-place cantilever structure formwork system is also provided, which specifically includes the following steps:

[0099] S1. Install the cantilever frame 2 at the bottom of the non-cantilevered part of the house 1. When installing the cantilever frame 2, use a drill gun to fix the fastening column 23 on the connecting piece 22 to the bottom of the non-cantilevered part of the house 1, and install the steel frame 21;

[0100] S2. After pouring the non-cantilevered part of the house 1, the reserved overhanging steel bars 3 are tied to the steel cage 4. When tying the steel cage 4, the cantilever frame 2 is used to provide support;

[0101] S3 two sets of steel beams 5 for flaw detection, detect whether there are cracks;

[0102] S4 between the two sets of steel beams 5 with rivets to fix the structural reinforcement rod 7, and use the cantilever frame 2 as an operating support;

[0103] S5. Install the template assembly 6. First, clean the first and second 匚-shaped templates 61 and 62 in the template assembly 6. Then, fix the first 匚-shaped template 61 in the template assembly 6 to the cantilever frame 2 with rivets. Then, engage the second 匚-shaped template 62 with the outside of the first 匚-shaped template 61 and fix the first and second 匚-shaped templates 61 and 62 with rivets.

[0104] S6 pouring concrete in the formwork assembly 6, performing compaction operation during pouring;

[0105] S7. Curing the concrete in the cantilever casting formwork;

[0106] S8. First remove the formwork assembly 6, and then disassemble the cantilever frame 2.

[0107] Among them, S1 before setting up the scaffold, full hanging safety net and laying the jump plate, climbing scaffold selection climbing scaffold, full hanging safety net covers the bottom and the side of the cantilever frame 2, the jump plate is fixed on the scaffold.

[0108] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and spirit of the application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A cast-in-place cantilever structure formwork system, characterized by: include: A cantilever frame (2) fixed to a non-cantilevered portion (1) of a house, wherein the cantilever frame (2) partially extends out of the non-cantilevered portion (1) of the house; An outwardly extending steel bar (3) deeply buried at the end side of the non-cantilevered portion (1) of the building; A steel cage (4) tied to the protruding steel bars (3); Two sets of steel cantilever beams (5) deeply buried at the end sides of the non-cantilevered portion (1) of the house; A template assembly (6) mounted and fixed on the cantilever frame (2); and concrete poured inside the formwork assembly (6); During construction, due to the reserved external reinforcement at the end of the non-cantilevered part of the house, a reinforcement cage is tied to the external reinforcement, and two sets of steel beams are deeply buried at the end of the non-cantilevered part of the house, the combined effect of the external reinforcement, reinforcement cage and steel beam can greatly improve the structural strength, bending and torsional modulus of the cantilever beam, thereby extending the service life of the cantilever beam; The cantilever frame (2) comprises a steel frame (21), a plurality of connecting pieces (22) and a plurality of fastening columns (23), wherein the plurality of connecting pieces (22) are respectively fixed to the non-cantilevered portion (1) of the house via the fastening columns (23); A plurality of structural reinforcement rods (7) are fixed between the two groups of steel suspension beams (5) by means of rivets; The template assembly (6) includes a first ⌚-shaped template (61), a second ⌚-shaped template (62) and a pouring port (63), wherein the first ⌚-shaped template (61) is fixed to the cantilever frame (2) by a plurality of rivets, and the second ⌚-shaped template (62) is fixed to the first ⌚-shaped template (61) by a plurality of rivets, and the pouring port (63) is opened on the second ⌚-shaped template (62).

2. The formwork system for cast-in-place cantilever structures according to claim 1, characterized in that: The steel frame (21) is formed by welding and fixing a plurality of channel steels, a plurality of H-shaped steels or a plurality of flat steels.

3. The formwork system for cast-in-place cantilever structures according to claim 1, characterized in that: The steel suspension beam (5) is one of H-shaped steel, T-shaped steel and channel steel.

4. The formwork system for a cast-in-place cantilever structure according to claim 1, characterized in that: The pouring method of the cast-in-place cantilever structure formwork system specifically includes the following parts: S1. Install the cantilever frame (2) at the bottom of the non-cantilevered portion (1) of the house. When installing the cantilever frame (2), use a drill gun to fix the fastening column (23) on the connecting piece (22) to the bottom of the non-cantilevered portion (1) of the house, and install and fix the steel frame (21); S2. After pouring the non-cantilevered portion of the house (1), the reserved overhanging steel bars (3) are tied to the steel cage (4). When tying the steel cage (4), the cantilever frame (2) is used to provide support; S3. The two groups of steel cantilever beams (5) are subjected to flaw detection to detect whether there are cracks; S4. The structural reinforcement rod (7) is fixed with rivets between the two sets of steel cantilever beams (5), and the cantilever frame (2) is used as an operating support; S5. Install the template component (6). First, clean the first C-shaped template (61) and the second C-shaped template (62) in the template component (6). Then, fix the first C-shaped template (61) in the template component (6) to the cantilever scaffold (2) with rivets. After that, snap the second C-shaped template (62) onto the outside of the first C-shaped template (61) and fix the first C-shaped template (61) and the second C-shaped template (62) with rivets. S6. Pour concrete into the template component (6) and perform compaction operations during pouring. S7. Maintain the concrete in the cantilever pouring template. S8. First, remove the template component (6), and then disassemble the cantilever scaffold (2). Before S1, set up a scaffold, fully hang a safety net and lay a gangplank. The scaffold selected is a climbing scaffold. The fully hung safety net covers the bottom and the periphery of the cantilever scaffold (2). The gangplank is fixed to the scaffold. After 1 - 2 hours of completing the concrete pouring in S6, connect heating wires to the concrete for electric heating of the concrete to prevent the concrete from being frostbitten or cracked. When the concrete reaches the designed strength, stop the electric heating. When stopping the electric heating, the cooling rate of the concrete is less than 4°C / h. When the concrete reaches normal temperature, use plastic film covering and water spraying for maintenance, and the maintenance time is not less than 14 days. When performing flaw detection on the two groups of profiled steel cantilever beams (5) in S3, the flaw detection equipment used is an ultrasonic flaw detector, and after flaw detection on the two groups of profiled steel cantilever beams (5), perform flaw detection on the extended reinforcing bars (3).

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