A cantilever structure construction hanging method early dismantling formwork system and construction method

Abstract

The present invention relates to the field of construction engineering technology, and specifically to an early dismantling formwork system and construction method for cantilever structure construction using a cantilever method, wherein the early dismantling formwork system comprises lattice column embedded parts, which are arranged side by side and spaced inside the top concrete of the crossbeam and the cantilever and are located on the central axis of the platform beam; steel cable embedded parts, which are arranged inside the top concrete of the crossbeam and the cantilever and on both sides of each lattice column embedded part; a lattice column, whose bottom is connected to the lattice column embedded part, and whose two sides are connected to the steel cable embedded parts by steel cables, and two adjacent lattice columns are connected by connecting parts, for distributing the weight of the cantilever to the crossbeam and the column. The present invention distributes the weight of the cantilever that has been cast but has not reached the demolding condition to the column and the crossbeam through the lattice column, the steel cable and the embedded parts, and the cantilever scaffold can be dismantled and turned over in advance, shortening the turnover cycle of the scaffold, thereby reducing the number of scaffolds rented and saving rental costs.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to a cantilever structure construction suspension-pull method early dismantling formwork system, and also provides a construction method of the cantilever structure construction suspension-pull method early dismantling formwork system. Background Art

[0002] With the rapid development of China's high-speed railways, high-speed railway platforms are spread all over the country. Platform canopies, which provide shelter from wind and rain for passengers when getting on and off trains, are one of the essential and important buildings in high-speed railway stations.

[0003] During the construction of the existing platform canopy, its formwork technology mainly relies on the full-height scaffolding system. Although the full-height scaffolding system has a good supporting effect, it requires a large number of scaffoldings during its construction. According to the construction specifications, the concrete of the platform canopy must reach 100% strength before the scaffolding and formwork can be removed. This causes the scaffolding to stay in one place for a long time, and the turnover cycle is long. In order to complete the on-site construction plan, a large number of scaffoldings need to be rented for on-site construction, resulting in high rental costs. At the same time, since the scaffolding can be removed after the crossbeam concrete reaches 50%, the cantilever scaffolding is removed later, resulting in the space below the cantilever being occupied by the cantilever scaffolding for a long time after the crossbeam scaffolding is removed, and the usable space is small. Summary of the invention

[0004] Therefore, the purpose of the present invention is to overcome the defects mentioned in the above background technology, so as to provide a cantilever structure construction hanging method early dismantling formwork system.

[0005] A construction method for building the formwork system is also provided.

[0006] A construction method for a cantilever structure construction suspended pull method early dismantling formwork system comprises the following steps:

[0007] S1: Cast the column on the center axis of the platform beam, and perform maintenance on the column after removing the column formwork to ensure that the concrete strength of the column reaches 100%;

[0008] S2: Set up brackets, lay templates and tie steel bars below the beam and cantilever design positions, preset lattice column embedded parts at the point where the top of the steel bars coincides with the centerline of the platform beam, and preset steel cable embedded parts on both sides of the lattice column embedded parts; after the embedded parts are preset, check the position of the embedded parts, and pour concrete after the check;

[0009] S3: When the concrete strength of the beam reaches 50%, the positions of the lattice column embedded parts and the steel cable embedded parts are corrected, and the excess concrete on the surfaces of the lattice column embedded parts and the steel cable embedded parts is cleaned;

[0010] S4: connecting the lattice column with the lattice column embedded parts, connecting two adjacent lattice columns through the connecting parts, connecting the lattice column with the steel cable embedded parts through the steel cable, and pre-tensioning and tightening the steel cable;

[0011] S5: Remove the support and move to the next working surface;

[0012] S6: After the strength of the beam concrete and cantilever concrete reaches 100%, the formwork, lattice columns and steel cables are removed and transported to the next working surface, and S1-S6 are repeated until all construction work is completed.

[0013] As a preferred construction method of the cantilever structure construction early dismantling formwork system in the present invention, in S2, the verification specifically includes the following steps:

[0014] Adjust the positions of the lattice column embedded parts and steel cable embedded parts to ensure that the lattice column embedded parts are all located on the center axis of the platform beam, and the steel cable embedded parts in the same row are parallel to the center axis of the platform beam. Re-adjust the lattice column embedded parts and steel cable embedded parts that do not meet the positioning requirements. After the lattice column embedded parts and steel cable embedded parts all meet the positioning requirements, proceed to the next construction operation.

[0015] As a preferred construction method of the cantilever structure construction suspension method early dismantling formwork system in the present invention, in S2, before setting up the beam support and cantilever support, the connection between the column and the beam and the cantilever needs to be roughened.

[0016] As a preferred construction method of the cantilever structure construction early dismantling formwork system in the present invention, in S3, the method of cleaning the excess concrete on the surface of the lattice column embedded parts and the steel cable embedded parts includes: sandblasting, liquid spraying, scraping, cutting and grinding.

[0017] As a preferred construction method of the cantilever structure construction suspension tension method early dismantling formwork system in the present invention, in S4, the pre-tensioning and tightening operation includes the following steps:

[0018] After the steel cables are connected, adjust the length of the steel cables to make them taut, and review the position and tightness of the steel cables after pre-tensioning and tightening. The steel cables that do not meet the tightening requirements will be re-pre-tensioned and tightened. After all the steel cables meet the requirements, proceed to the next construction operation.

[0019] A cantilever structure construction cantilever method early dismantling formwork system, comprising a column, a beam and a cantilever arranged on the column, a beam formwork arranged at the bottom of the beam, and a cantilever formwork arranged at the bottom of the cantilever, and also comprising:

[0020] The embedded parts of the lattice columns are arranged side by side and at intervals inside the top concrete of the cross beam and the cantilever and are located on the central axis of the platform beam.

[0021] The steel cable embedded parts are arranged inside the concrete of the cross beam and the cantilevered top and on both sides of each lattice column embedded parts. The steel cable embedded parts located in the same row are parallel to the center axis of the platform beam.

[0022] The lattice column has its bottom connected to the lattice column embedded parts, its two sides are connected to the steel cable embedded parts through steel cables, its top is connected to each other through cross braces, and two adjacent lattice columns are connected to each other through connecting parts, so as to disperse and transfer the cantilever weight to the beams and columns.

[0023] As a preferred embodiment of the early dismantling formwork system for cantilever structure construction in the present invention, the lattice column includes a pair of channel steels, the bottoms of which are connected to each other by anchor plates, the pair of channel steels are connected to each other by diagonal braces, and the sides of the channel steels are provided with hanging ears.

[0024] As a preferred embodiment of the early dismantling formwork system for cantilever structure construction in the present invention, the lattice column embedded part is a ground anchor bolt, one end of which is connected to the steel bar inside the beam or the cantilever, and the other end extends out of the top surface of the beam concrete or the cantilever concrete and is connected to the lattice column through an anchor plate.

[0025] As a preferred embodiment of the cantilever structure construction early dismantling formwork system in the present invention, the steel cable embedded parts include anchor rods embedded in the beam concrete or cantilever concrete and connected to the steel bars, and connecting plates for connecting to the steel cables.

[0026] The technical solution of the present invention has the following advantages:

[0027] The present invention sets lattice columns on the upper part of the columns where the concrete strength has reached 100% and the beams where the demolding conditions have been reached, connects the lattice columns and the cantilever through steel cables and embedded parts, and converts the cantilever that has been cast but has not reached the demolding conditions from the original scaffolding formwork system support to the suspended formwork support of the hanging method. The scaffolding support system at the bottom can be dismantled and turned over in advance, shortening the turnover cycle of the scaffolding, thereby reducing the number of scaffolding rentals and saving rental costs. It also avoids the problem that the empty frame below the cantilever is occupied by the scaffolding for a long time, affecting the subsequent construction, and increases the usable space. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is one of the partial structural perspective views of the present invention.

[0030] Figure 2 This is the second partial structural perspective view of the present invention.

[0031] Figure 3 It is a partial structural schematic diagram of the present invention.

[0032] Figure 4 It is a schematic diagram of the overall structure of the present invention.

[0033] Figure 5 It is a schematic diagram of the force of the integral steel cable of the present invention.

[0034] Figure 6 for Figure 5 Schematic diagram of the force on the steel cable with the largest force.

[0035] Figure 7 It is a force diagram of the integral lattice column of the present invention.

[0036] Figure 8 for Figure 7 Schematic diagram of the stress on the lattice column with the largest stress.

[0037] Fig. 9 It is a schematic diagram of the overall cantilever force of the present invention.

[0038] Fig.10 for Fig. 9 Force diagram of the cantilever with the largest force.

[0039] Fig.11 It is a schematic diagram of the connection system of lattice columns, steel cables, lattice column embedded parts and steel cable embedded parts.

[0040] Description of reference numerals:

[0041] 1. Lattice column; 101. Channel steel; 102. Anchor plate; 103. Diagonal brace; 2. Steel cable; 3. Lattice column embedded parts; 4. Steel cable embedded parts; 5. Connectors; 6. Column; 7. Crossbeam; 8. Cantilever. DETAILED DESCRIPTION

[0042] The technical solution of the present invention will be described clearly and completely below 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 creative work are within the scope of protection of the present invention.

[0043] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0046] This embodiment provides a cantilever structure construction suspension method early dismantling formwork system, such as Figure 1 to Figure 4 As shown, it includes a lattice column 1, a steel cable 2, a lattice column embedded part 3, a steel cable embedded part 4, a connecting part 5, a column 6, a crossbeam 7, a cantilever 8, a crossbeam formwork arranged at the bottom of the crossbeam 7, and a cantilever formwork arranged at the bottom of the cantilever 8.

[0047] A plurality of columns 6 are arranged side by side and spaced apart on the central axis of the platform beam to support the platform canopy. A crossbeam 7 is arranged along the radial direction of the platform beam and connected to the columns 6. A cantilever 8 is connected to the columns 6 and the crossbeam 7 to shield sunlight and precipitation.

[0048] A plurality of lattice column embedded parts 3 are arranged side by side and at intervals inside the top concrete of the cross beam 7 and the cantilever 8 and are located on the central axis of the platform beam.

[0049] Multiple steel cable embedded parts 4 are arranged inside the top concrete of the cross beam 7 and the cantilever 8. Two rows of steel cable embedded parts 4 are arranged on both sides of each lattice column embedded part 3. The steel cable embedded parts 4 in the same row are parallel to the center axis of the platform beam.

[0050] The lattice column 1 is composed of a pair of channel steels 101. The distance between two adjacent lattice columns 1 is 2m. The bottom of the lattice columns 1 is connected to each other through anchor plates 102, and the tops are connected to each other through cross braces. The pair of channel steels 101 are connected to each other through diagonal braces 103, and the sides of the channel steels 101 are provided with hanging ears. It is connected to the lattice column embedded parts 3 through the anchor plates 102 to fix the lattice column 1 to the upper part of the column 6 or the cross beam 7. One end of the steel cable 2 is connected to the lattice column 1 through the hanging ear, and the other end is connected to the column 6 or the cross beam 7 through the steel cable embedded parts 4. The diagonal braces 103, cross braces and connectors 5 are all angle steels.

[0051] By adopting the above structure, lattice columns 1 are arranged on the upper part of the columns 6 and the cross beams 7 that have reached the demolding conditions, and the lattice columns 1 are connected to the cantilever 8 through the steel cables 2 and the embedded parts, the cantilever 8 that has been cast but has not reached the demolding conditions is converted from the original scaffolding formwork system support to the suspended formwork support, and the scaffolding support system at the bottom can be dismantled and turned over in advance, shortening the turnover cycle of the scaffolding, thereby reducing the number of scaffoldings rented and saving rental costs. It also avoids the problem that the empty frame below the cantilever 8 is occupied by the scaffolding for a long time, affecting the subsequent construction, and increases the usable space. At the same time, Fig.11 As shown, the connection system of the lattice column 1, the steel cable 2 and the embedded parts not only meets the requirements of the specification for cantilever structure demoulding, but also saves materials and processing costs as much as possible, and is light in weight to facilitate transportation and turnover.

[0052] According to Article 4.5.5 of the "Concrete Structure Engineering Construction Code" (GB50666-2011), the spacing between the support poles of the early-removal support system should not be greater than 2m. When removing the formwork, the poles should be retained and supported on the floor slab. The concrete strength when removing the formwork can be determined according to the provisions in Table 1 with a member span of 2m:

[0053] Table 1 Concrete strength requirements when removing the bottom membrane

[0054]

[0055] In this embodiment, the weight of the cantilever 8 is dispersedly transferred to the cross beam 7 and the column 6 through the steel cable embedded parts 4 , the steel cables 2 , and the lattice column 1 .

[0056] In this embodiment, in order to prevent the lattice columns 1 from bending and deforming due to the gravity of the cantilever 8, a connecting member 5 is provided between two adjacent lattice columns 1 to enhance the anti-bending performance thereof.

[0057] In this embodiment, the lattice column embedded part 3 is a ground anchor bolt, one end of which is connected to the steel bars inside the beam 7 or the cantilever 8, and the other end extends out of the top surface of the beam concrete or the cantilever concrete and is connected to the lattice column 1 through the anchor plate 102.

[0058] In this embodiment, the steel cable embedded part 4 includes an anchor rod embedded in the beam concrete or cantilever concrete and connected to the steel bar, and a connecting plate used to be connected to the steel cable.

[0059] This embodiment also provides a construction method for the above-mentioned cantilever structure construction suspension method early dismantling formwork system, comprising the following steps:

[0060] A1.1: Carry out the column reinforcement binding operation at the designed column position on the centerline of the platform beam. After acceptance, carry out the column formwork closing and column concrete pouring operation. The layered method is adopted during pouring. When pouring the column concrete, pay attention to vibrating the column concrete to make it dense.

[0061] A1.2: After the concrete strength of the column reaches the demoulding strength, the column formwork is removed and the column is moved to the next working surface. The column 6 is maintained according to the specifications to make the concrete strength of the column 6 reach 100%;

[0062] A2.1: Set up beam supports on both sides of the column 6, set up cantilever supports between two adjacent columns 6, install beam formwork and cantilever formwork on the beam support and cantilever support respectively, tie the beam reinforcement and cantilever reinforcement. During the tying of the beam reinforcement, preset the lattice column embedded parts 3 at the position where the top of the beam reinforcement coincides with the center axis of the platform beam, and preset the steel cable embedded parts 4 on both sides of the lattice column embedded parts 3; during the tying of the cantilever reinforcement, preset the lattice column embedded parts 3 at intervals side by side on the top of the reinforcement in the middle position of the cantilever, and preset the steel cable embedded parts 4 on both sides of the lattice column embedded parts 3.

[0063] A2.2: After the lattice column embedded parts 3 and the steel cable embedded parts 4 are preset, adjust the positions of the lattice column embedded parts 3 and the steel cable embedded parts 4 to ensure that the lattice column embedded parts 3 are all located on the center axis of the platform beam, and the steel cable embedded parts 4 located in the same row are parallel to the center axis of the platform beam.

[0064] A2.3: Check the adjusted lattice column embedded parts 3 and steel cable embedded parts 4. Return the lattice column embedded parts 3 and steel cable embedded parts 4 that do not meet the positioning requirements to A2.2 for readjustment. After all lattice column embedded parts 3 and steel cable embedded parts 4 meet the positioning requirements, proceed to the next construction operation.

[0065] A2.4: After verification, the pouring of beam concrete and cantilever concrete shall be carried out. During the pouring process, attention shall be paid to vibrating the beam concrete and cantilever concrete to make them dense.

[0066] A3: When the strength of the beam concrete reaches 50%, measurement and layout operations are carried out to correct the lattice column embedded parts 3 and steel cable embedded parts 4 whose positions have changed during the pouring of the beam concrete and cantilever concrete, and clean up the excess concrete on the surfaces of the lattice column embedded parts 3 and steel cable embedded parts 4.

[0067] A4.1: Connect the pre-assembled lattice columns 1 to the lattice column embedded parts 3 , and connect two adjacent lattice columns 1 to each other via the connecting parts 5 .

[0068] A4.2: Connect one end of the steel cable 2 to the hanging ear on the lattice column 1, and the other end to the steel cable embedded part 4. After the steel cable 2 is connected, pre-tension and tighten it to make the steel cable 2 taut.

[0069] A4.3: Review the position and tightness of the steel cables 2 after pre-tensioning and tightening. If the steel cables 2 do not meet the requirements, repeat A4.2. After all the steel cables 2 meet the requirements, proceed to the next construction work.

[0070] A5: Remove the beam support and cantilever support, and move to the next work surface.

[0071] A6: After the strength of the beam concrete and the cantilever concrete reaches 100%, remove the beam formwork and the cantilever formwork, disconnect the connections between the lattice column 1 and the lattice column embedded part 3, the lattice column 1 and the steel cable 2, the lattice column 1 and the lattice column 1, and the steel cable 2 and the steel cable embedded part 4, and transport them to the next working surface, repeat S1-S6 until all construction operations are completed.

[0072] In this embodiment, the column 6 in A1.1 is cast by a layered method.

[0073] In this embodiment, in A2.1, before erecting the crossbeam support and the cantilever support, the connection between the column 6 and the crossbeam 7 and the cantilever 8 needs to be roughened to enhance the connection strength between the crossbeam 7 and the cantilever 8 and the column 6.

[0074] In this embodiment, in A3, the methods for cleaning the excess concrete on the surfaces of the lattice column embedded parts 3 and the steel cable embedded parts 4 include but are not limited to sandblasting, liquid spraying, scraping, cutting and grinding.

[0075] In this embodiment, when the beam support and cantilever support are just removed, the tension exerted on the lattice column 1, steel cable 2, beam 7 and cantilever 8 in this system is at the maximum value. Thereafter, with the passage of time, the strength of the cantilever concrete and beam concrete gradually increases, and the tension exerted on the lattice column 1 and steel cable 2 gradually decreases. The following is the force simulation result of each part of the beam support and cantilever support in the early dismantling formwork system of the cantilever structure construction method when they are just removed.

[0076] like Figure 5 and Figure 6 As shown, in this embodiment, the steel cable 2 located at the outermost side of the middle part of the support system is subjected to the largest tension, and its maximum value is 101N / mm 2 .

[0077] like Figure 7 and Figure 8 As shown, in this embodiment, the tensile force at the intersection of the two uppermost diagonal braces 103 in the lattice column 1 located in the middle of the support system is the largest, and its maximum value is 131.6 N / mm 2 .

[0078] like Fig. 9 and Fig.10 As shown in the figure, in this embodiment, the tension on both sides of the cantilever 8 in the middle of the support system is the largest, and its maximum value is 5.808N / mm 2 .

[0079] The results obtained from the stress simulation are all within a safe range. The formwork system of the present invention will not cause a safety hazard to the canopy when the concrete strength reaches the maximum value, which complies with the requirements of the "Concrete Structure Engineering Construction Code" (GB50666-2011).

[0080] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A construction method for cantilever structure construction using a cantilever method early dismantling formwork system, characterized in that: This construction method is realized by using a formwork system. The formwork system comprises a column (6), a beam (7) and a cantilever (8) arranged on the column (6), a beam formwork arranged at the bottom of the beam (7) and a cantilever formwork arranged at the bottom of the cantilever (8), and is characterized in that it also comprises: Lattice column embedded parts (3) are arranged side by side and at intervals inside the top concrete of the cross beam (7) and the cantilever (8) and are located on the central axis of the platform beam; Steel cable embedded parts (4) are arranged inside the top concrete of the cross beam (7) and the cantilever (8) and on both sides of each lattice column embedded part (3), and the steel cable embedded parts (4) located in the same row are parallel to the center axis of the platform beam; A lattice column (1), the bottom of which is connected to a lattice column embedded part (3), and the two sides of which are connected to the steel cable embedded parts (4) via steel cables (2), and two adjacent lattice columns (1) are connected to each other via a connecting piece (5) for distributing the weight of the cantilever (8) to the crossbeam (7) and the column (6); The construction method of the cantilever structure construction suspension method early dismantling formwork system comprises the following steps: S1: Casting a column (6) on the center axis of the platform beam, and after removing the column formwork, performing maintenance work on the column (6) so that the concrete strength of the column (6) reaches 100%; S2: erecting a support, laying a formwork and tying steel bars below the designed positions of the cross beam (7) and the cantilever (8), pre-setting a lattice column embedded part (3) at the position where the top of the steel bar coincides with the center axis of the platform beam, and pre-setting steel cable embedded parts (4) on both sides of the lattice column embedded part (3); after the pre-setting of the embedded parts is completed, checking the positions of the embedded parts, and pouring concrete after the checking is completed; S3: When the concrete strength of the cross beam (7) reaches 50%, the positions of the lattice column embedded parts (3) and the steel cable embedded parts (4) are corrected, and the excess concrete on the surfaces of the lattice column embedded parts (3) and the steel cable embedded parts (4) is cleaned; S4: connecting the lattice column (1) to the lattice column embedded component (3), connecting two adjacent lattice columns (1) via a connecting component (5), connecting the lattice column (1) to the steel cable embedded component (4) via a steel cable (2), and pre-tensioning and tightening the steel cable (2); S5: Remove the support and move to the next working surface; S6: After the strength of the beam concrete and the cantilever concrete reaches 100%, the formwork, lattice columns (1) and steel cables (2) are removed and transported to the next working surface, and S1-S6 are repeated until all construction operations are completed.

2. According to the construction method of the cantilever structure construction suspension method early dismantling formwork system according to claim 1, in S2, the review specifically comprises the following steps: The positions of the lattice column embedded parts (3) and the steel cable embedded parts (4) are adjusted to ensure that the lattice column embedded parts (3) are all located on the center axis of the platform beam, and the steel cable embedded parts (4) located in the same row are parallel to the center axis of the platform beam. The lattice column embedded parts (3) and the steel cable embedded parts (4) that do not meet the positioning requirements are readjusted. After the lattice column embedded parts (3) and the steel cable embedded parts (4) all meet the positioning requirements, the next step of construction is carried out.

3. The construction method of the cantilever structure construction suspension method early dismantling formwork system according to claim 1 is characterized in that: In S2, before erecting the crossbeam support and the cantilever support, the connection between the column (6) and the crossbeam (7) and the cantilever (8) needs to be roughened.

4. The construction method of the cantilever structure construction suspension method early dismantling formwork system according to claim 1 is characterized in that: In S3, the method of cleaning the excess concrete on the surface of the lattice column embedded part (3) and the steel cable embedded part (4) includes: sandblasting, liquid spraying, scraping, cutting and grinding.

5. The construction method of the cantilever structure construction early dismantling formwork system according to claim 1 is characterized in that: In S4, the pre-tensioning and tightening operation includes the following steps: After the steel cables (2) are connected, the length of the steel cables (2) is adjusted to make them tight, and the position and tightness of the pre-tensioned and tightened steel cables (2) are checked again. The steel cables (2) that do not meet the tightening requirements are re-pre-tensioned and tightened. After all the steel cables (2) meet the requirements, the next construction operation is carried out.

6. The construction method of the cantilever structure construction suspension method early dismantling formwork system according to claim 1 is characterized in that: The lattice column (1) comprises a pair of channel steels (101), the bottoms of which are connected to each other via an anchor plate (102), the tops of which are connected to each other via a cross brace, the pair of channel steels (101) are connected to each other via a diagonal brace (103), and the side surfaces of the channel steels (101) are provided with hanging ears.

7. The construction method of the cantilever structure construction early dismantling formwork system according to claim 1 is characterized in that: The lattice column embedded part (3) is a ground anchor bolt, one end of which is connected to the steel bars inside the crossbeam (7) or the cantilever (8), and the other end of which extends out of the top surface of the crossbeam concrete or the cantilever concrete and is connected to the lattice column (1) through an anchor plate (102).

8. The construction method of the cantilever structure construction early dismantling formwork system according to claim 1 is characterized in that: The steel cable embedded part (4) comprises an anchor rod embedded in the crossbeam concrete or cantilever concrete and connected to the steel bars, and a connecting plate used to be connected to the steel cable.

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