CN220013390U - Sideslip-preventing double-jack type long cantilever bent cap template bracket system - Google Patents

Abstract

The utility model discloses an sideslip-preventing double-jack type long cantilever bent cap template bracket system, which comprises: a bracket body; the fixed ends of the supporting pieces are placed on the limiting pieces arranged in pairs through the mounting seats, and the working ends of the supporting pieces are overlapped with the bracket body; the limiting piece is arranged in a preformed hole of the bridge pier column in a penetrating way; the bottom support bodies are symmetrically arranged at two sides of the upper end of the top of the bracket body; the bottom die supporting frames are respectively arranged above the bottom supporting bodies; the middle support body is arranged in the middle of the top end of the bracket body; the side protection support body frames are symmetrically arranged on two sides of the upper part of the bracket body; the end supporting bodies are symmetrically arranged at two ends of the side protection supporting body. The utility model can ensure the construction safety of the long cantilever bent cap, ensure the deformation of the cantilever end of the bent cap within the standard allowable range, ensure the construction quality and facilitate the installation and the disassembly.

Description

An anti-sideslip double jack type long cantilever cover beam formwork bracket system

Technical field

The utility model relates to a formwork bracket system, specifically to an anti-sideslip double jack type long cantilever cover beam formwork bracket system, which belongs to the technical field of highway bridge engineering construction.

Background technique

Generally speaking, with the development of highway engineering bridge construction technology, long cantilever prestressed cap beams are increasingly used in bridge engineering. However, for mountainous highway bridge projects, due to landform restrictions, the height of bridge piers is often very large. If the long cantilever cap beam is constructed using traditional full-floor supports, the cost will be greatly increased, and safety and construction period risks will be difficult to control. At the same time, for cantilever structures, if the support stiffness at the bottom of the formwork is insufficient, cracks will easily form on the cover beam, causing a greater quality hazard. For the construction of long cantilever cap beams with high pier columns, an economical, safe, and quality-controllable formwork bottom support must be studied. In order to solve this problem, the bottom support of the long cantilever cap beam formwork must be studied and improved.

Therefore, it is necessary to develop an anti-sideslip double jack type long cantilever cover beam formwork bracket system with higher safety and stronger working reliability, which is the key to solving the above technical problems.

Contents of the invention

In view of the many defects and deficiencies existing in the above background technology, the present utility model has made improvements and innovations, and aims to provide a device with a simple structure, novel and reasonable design, high safety, and sufficient stiffness, strength and stability. , can ensure the safety of construction of long cantilever cover beams, ensure that the deformation of the cantilever end of the cover beam is within the allowable range of the specification, and ensure the construction quality. At the same time, it is easy to install and disassemble, which can significantly improve construction efficiency, ensure construction quality, and reduce later maintenance costs.

Another purpose of the invention is to use this utility model to achieve sufficient rigidity in the formwork support of the long cantilever cover beam, so that the cantilever end of the cover beam has minimal deformation and avoids the occurrence of cracks; and because double jacks are used as the The support, coupled with the stable truss system, avoids the problem of bracket sliding or instability.

In order to solve the above problems and achieve the above-mentioned purpose of the invention, an anti-side-slip double jack type long cantilever cover beam formwork bracket system of the present invention is realized by adopting the following design structure and adopting the following technical solutions:

An anti-sideslip double jack type long cantilever cover beam formwork bracket system, including:

The bracket body (1) is used as a support for the long cantilever cover beam formwork;

There are a plurality of supports (2). The fixed end of each support (2) is placed on a pair of limiting parts (4) through the mounting seat (3). The working end of the support (2) is in contact with the bracket body ( 1) Overlapping to form the support system of the bracket body (1);

The limiting piece (4) is installed in the reserved hole of the bridge pier column;

The bottom support body (5) is symmetrically arranged on both sides of the top and upper end of the bracket body (1);

The bottom mold support frame (6) is placed above the bottom support body (5) respectively, and is used as a bracket system for the bottom mold of the cover beam;

The middle support body (7) is provided at the top middle of the bracket body (1);

The side protection support body (8) is symmetrically installed on both sides of the upper part of the bracket body (1);

The end support body (9) is symmetrically arranged at both ends of the side protection support body (8); and each end support body (9) is installed on each bottom mold support through a pull screw. The end of the frame (6) forms an overall stress-bearing structure.

Preferably, the bracket body (1) includes:

Bracket upper chord beams (1a), the bracket upper chord beams (1a) are two arranged opposite to each other, and the two bracket upper chord beams (1a) are detachably connected as a whole through tension screws;

Bracket lower chord beams (1b), the bracket lower chord beams (1b) are two relatively parallel to each other, and the two bracket lower chord beams (1b) are detachably connected as a whole through tension screws;

The bracket web beam (1c) is symmetrically connected between the bracket upper chord beam (1a) and the bracket lower chord beam (1b) to form a whole.

Preferably, the bracket upper chord beam (1a), the bracket lower chord beam (1b) and the bracket web beam (1c) are all I-beams.

Preferably, the support member (2) is a jack;

The mounting base (3) is a U-shaped or C-shaped channel steel with an upward opening.

Preferably, the limiting member (4) is a supporting round steel or steel bar;

The bottom support body (5) and the middle support body (7) are both made of multiple square steels connected to the bracket body (1) in rows equidistantly or unequally to form a hollow knot frame body.

Preferably, the bottom mold support frame (6) includes:

first support frame (6a),

the second support frame (6b), the second support frame (6b) is connected to the first support frame (6a) to form a whole;

And the first support frame (6a) and the second support frame (6b) are triangular supports formed by multiple U-shaped or C-shaped channel steels that are assembled and welded to each other.

Preferably, the side protection support body (8) is composed of a plurality of protective templates (8a) of different shapes and sizes that are connected to each other through bolt assemblies in sequence.

Preferably, the end support body (9) includes:

L-shaped brackets (9a), which are two L-shaped brackets (9a) arranged relatively parallel to each other;

Support plate (9b), the support plate (9b) is connected to the top surface of the L-shaped bracket (9a);

The end plate (9c) is detachably installed on one end of the L-shaped bracket (9a) through a pull screw.

Preferably, the L-shaped bracket (9a) is composed of a transverse I-beam and a vertical I-beam vertically connected to either end of the transverse I-beam.

Preferably, it also includes:

The enclosure (10) is located around the top of the bottom support body (5) and the middle support body (7). The enclosure (10) is made of lightweight assembled steel wire mesh and support steel bars and is connected to each other. Become.

The working principle is: before using the anti-side-slip double-jack type long cantilever cover beam formwork bracket system with the above-mentioned design structure, it needs to be installed as a backup.

During installation, the utility model adopts a truss-type bracket composed of a bracket upper chord beam (1a), a bracket lower chord beam (1b), and a bracket web beam (1c) as the support for the long cantilever cover beam formwork. The bracket body (1) is suspended and installed on the support system composed of the support piece (2), the mounting seat (3) and the limiting piece (4). The bottom support body (5) is paved on the upper chord beam (1a) of the bracket. A bottom mold support frame (6) is arranged on top of the bracket body (1), and a pull screw rod is used to pull the bracket body (1) together, and a fence (10) is set at the top edge.

During specific use, insert the limiting piece (4) into the reserved hole in the bridge pier column (11), place the mounting base (3) on the limiting piece (4), and put the supporting piece (2) into the mounting base (3). ), adjust the height of the support (2). Secondly, lift the welded bracket body (1) and place it on the support member (2), and adjust the height difference of the support member (2) again to make the top cross slope of the upper chord beam (1a) of the bracket consistent with the cross slope of the cover beam. The end support bodies (9) on the left and right sides of the bridge pier column (11) are tied together again by using pull screw rods. Again, lay the bottom support body (5) evenly on the top surface of the upper chord beam (1a) of the bracket, and perform spot welding. Measure and lay out the line again, place the bottom mold support frame (6) on the bottom support body (5), install the end support body (9) at the same time, and finally install the enclosure (10). After completion, you can proceed to the next step. Corresponding construction procedures.

Compared with the existing technology, the beneficial effects produced by this utility model are:

1. This utility model has a simple structure, novel and reasonable design, high safety, and can have sufficient stiffness, strength and stability to ensure the safety of long cantilever cover beam construction, ensure that the deformation of the cantilever end of the cover beam is within the allowable range of the specification, and ensure Construction Quality. At the same time, it is easy to install and disassemble, which can significantly improve construction efficiency and ensure construction quality, and reduce later maintenance costs;

2. This utility model solves the problem of insufficient stiffness caused by conventional single-shaped steel supports in the construction of long cantilever cap beams, and replaces the complicated pre-embedded diagonal brace brackets. It has a simple structure, convenient and fast installation, and has excellent molding quality after removing the formwork. better;

3. The use of this utility model can not only achieve sufficient rigidity in the long cantilever cover beam formwork support, so that the cantilever end of the cover beam can be deformed very little, and the occurrence of cracks can be avoided; because double jacks are used as supports, coupled with a stable truss system , to avoid the problem of bracket sliding or instability;

4. The connection and installation of this utility model are stable and reliable. The utility model is prefabricated and assembled easily. It can achieve efficient installation and disassembly, facilitate turnover and use, improve the use efficiency, ensure the safety and quality of the construction of high pier columns and long cantilever cover beams, and facilitate installation and disassembly. It is fast and reduces the labor intensity of construction operators to the greatest extent;

5. The utility model is coated with an anti-rust layer and a waterproof layer on the outside, which can prevent rust and extend the service life of the entire device. It is environmentally friendly and saves resources. At the same time, the outside of the bracket system is coated with There are self-illuminating fluorescent materials that can clearly mark the position of the bracket system at night or in dark indoor and underground construction environments. It can effectively serve as a safety reminder, improve eye-catching, and be easy for people to identify, increasing construction and life. security in

6. The main body of this bracket system is truss type, which greatly increases the rigidity of the cover beam formwork support. It adopts prefabricated installation and comes with a safety enclosure, which not only ensures that the deformation of the cantilever end of the long cantilever cover beam is within a controlled range. It prevents the occurrence of concrete cracks and ensures that the overall stress of the bracket system is stable and does not cause instability or sideslip. At the same time, the entire bracket system is easy to install and disassemble and facilitates construction, effectively solving the safety and quality problems faced in the construction of long cantilever cap beams. question.

Description of the drawings

The specific embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings, wherein:

Figure 1 is one of the schematic diagrams of the use state of the utility model;

Figure 2 is the second schematic diagram of the use state of the present utility model;

Figure 3 is a schematic diagram of the overall structure of the utility model;

Figure 4 is the third schematic diagram of the use state of the utility model;

Figure 5 is one of the schematic diagrams of the overall structure of the first support frame (6a) component of the present utility model;

Figure 6 is the second schematic diagram of the overall structure of the first support frame (6a) component of the present utility model;

Figure 7 is a schematic diagram of the overall structure of the second support frame (6b) component of the present utility model;

Figure 8 is one of the schematic diagrams of the overall structure of the template (8a) component of the present utility model;

Figure 9 is the second schematic diagram of the overall structure of the template (8a) component of the present utility model;

Figure 10 is one of the schematic diagrams of the overall structure of another design structure of the template (8a) component of the present invention;

Figure 11 is the second schematic diagram of the overall structure of another design structure of the template (8a) component of the present invention;

Figure 12 is one of the schematic diagrams of the overall structure of another design structure of the template (8a) component of the present utility model;

Figure 13 is one of the schematic diagrams of the overall structure of another design structure of the template (8a) component of the present utility model;

Figure 14 is the second schematic diagram of the overall structure of yet another design structure of the template (8a) component of the present utility model;

Figure 15 is the second schematic diagram of the overall structure of yet another design structure of the template (8a) component of the present invention;

Figure 16 is one of the schematic diagrams of the overall structure of the end support body (9) component of the present utility model;

Figure 17 is the second schematic diagram of the overall structure of the end support body (9) component of the present utility model;

Figure 18 is a schematic diagram of the overall structure of the enclosure (10) component of the present utility model;

Among them, the numbers in the figure are: 1—bracket body, 1a—bracket upper chord beam, 1b—bracket lower chord beam, 1c—bracket web beam;

2—Supporting parts;

3—Mounting seat;

4—limiting piece;

5—Bottom support body;

6—bottom mold support frame, 6a—first support frame, 6b—second support frame;

7—Middle support body;

8—side protective support body, 8a—template;

9—end support body, 9a—L-shaped bracket, 9b—support plate, 9c—end plate;

10—enclosure;

11—Pier pier.

Detailed ways

In order to make it easy to understand the technical means, creative features, objectives and effects achieved by the present utility model, the technical solution of the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation modes. It should be noted that, unless there is any conflict, In this case, the embodiments and features in the embodiments in this application can be combined with each other. The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in the accompanying drawings of the instruction manual, an anti-side-slip double jack type long cantilever cover beam formwork bracket system includes:

The bracket body 1 is used as a support for the long cantilever cover beam formwork;

A plurality of supports 2. The fixed end of each support 2 is placed on a pair of limiting members 4 through the mounting seat 3. The working end of the support 2 overlaps with the bracket body 1 to form the bracket body. 1 support system;

The limiter 4 is inserted into the reserved hole of the bridge pier column;

The bottom support body 5 is symmetrically arranged on both sides of the top and upper end of the bracket body 1;

The bottom mold support frame 6 is placed above the bottom support body 5 and is used as a support system for the bottom mold of the cover beam;

The middle support body 7 is provided at the top middle of the bracket body 1;

The side protection support body 8 is symmetrically installed on both sides of the upper part of the bracket body 1;

The end support bodies 9 are symmetrically arranged at both ends of the side protection support body 8; and each end support body 9 is installed on the end of each bottom mold support frame 6 through pull screws to form a whole stress-bearing structure.

In the present utility model, the bracket upper chord beam 1a, the bracket lower chord beam 1b and the bracket web beam 1c are connected in a truss type through welding. Bolt holes are left on the upper chord 1a of the bracket and the lower chord 1b of the bracket, which serve as the pulling holes for the pulling screws. The pulling screws are made of precision-rolled rebar.

Reserve two holes in advance on the bridge piers, insert the limiter 4 into them, and place the mounting base 3 on the cantilever end of the limiter 4. The mounting base 3 is made of channel steel, and its length should be such that both ends can just rest on the bracket web beam 1c. Place two supports 2 on each side of the bridge pier and place them on the mounting base 3. Adjust the height of the support member 2 so that the top elevation of the single-frame bracket unit meets the bottom elevation requirements of the cover beam.

The bottom support body 5 and the middle support body 7 are made of small I-beams, which are evenly laid on the top surface of the upper chord beam 1a of the bracket, and the two are spot welded to prevent sliding. The bottom mold support frame 6 is welded by small channel steel, and its length and slope are determined according to the hypotenuse of the bottom of the cover beam.

Further, the bracket body 1 includes:

Bracket upper chord beams 1a, the bracket upper chord beams 1a are two arranged opposite to each other, and the two bracket upper chord beams 1a are detachably connected as a whole through pull screws;

Bracket lower chords 1b, the bracket lower chords 1b are two relatively parallel to each other, and the two bracket lower chords 1b are detachably connected as a whole through pull screws;

The bracket web beam 1c is symmetrically connected between the bracket upper chord beam 1a and the bracket lower chord beam 1b to form a whole.

Specifically, the bracket upper chord 1a, the bracket lower chord 1b and the bracket web beam 1c are all made of I-beam steel.

In the present utility model, the bracket upper chord beam 1a, the bracket lower chord beam 1b and the bracket web beam 1c can also be square steel or square tubes.

Further, the supporting member 2 is a jack;

The mounting base 3 is a U-shaped or C-shaped channel steel with an upward opening.

Further, the limiter 4 is a supporting round steel or steel bar;

The bottom support body 5 and the middle support body 7 are both made of a plurality of square steels connected to the bracket body 1 in rows equidistantly or unequally to form a hollow frame body.

Further, the bottom mold support frame 6 includes:

The first support frame 6a,

the second support frame 6b, the second support frame 6b is connected to the first support frame 6a to form a whole;

The first support frame 6a and the second support frame 6b are triangular supports formed by multiple U-shaped or C-shaped channel steels that are assembled and welded to each other.

Further, the side protection support body 8 is composed of a plurality of protection templates 8a of different shapes and sizes that are connected to each other through bolt assemblies in sequence.

In the present utility model, the protective formwork 8a is a formwork of various shapes that is assembled and connected by a square plate-shaped body, a U-shaped channel steel, and an L-shaped angle steel.

Further, the end support body 9 includes:

L-shaped brackets 9a, two L-shaped brackets 9a are arranged relatively parallel to each other;

Support plate 9b, the support plate 9b is connected to the top surface of the L-shaped bracket 9a;

The end plate 9c is detachably mounted on one end of the L-shaped bracket 9a through a pull screw.

Specifically, the L-shaped bracket 9a is composed of a transverse I-beam and a vertical I-beam vertically connected to either end of the transverse I-beam.

More specifically, it also includes:

The enclosure 10 is located around the tops of the bottom support body 5 and the middle support body 7. The enclosure 10 is made of lightweight prefabricated steel wire mesh and supporting steel bars and is connected to each other to facilitate installation and disassembly.

In the bracket body 1, the support part 2, the mounting seat 3, the limiter 4, the bottom support body 5, the bottom mold support frame 6, the middle support body 7, the side protection support body 8 and the end support body 9 and the enclosure 10 The outer surface of the product is provided with an injection molding layer, an anti-rust layer, a waterproof layer and a warning layer in order from the inside to the outside. The warning layer is coated with fluorescent powder.

In the present utility model, a polymer wear-resistant material is injected on the injection molding layer; the anti-rust layer includes an epoxy zinc-rich primer and a chlorinated rubber topcoat and is located between the epoxy zinc-rich primer and the chlorinated rubber topcoat. The epoxy mica iron intermediate paint; the waterproof layer is polyurethane waterproof coating; the warning layer is a reflective warning tape or reflective color film or reflective paint of a single color or a mixture of multiple colors.

At the same time, in the present utility model, the connections referred to are fixed connections, movable connections, or detachable connections, wherein the fixed connections are welded connections or directly processed into an integrally formed structure; the movable connections, detachable connections, or detachable connections are The body structure is hinged connection, internal and external threaded connection, bayonet connection, plug-in socket, bolt component connection or screw connection.

To sum up, a more specific implementation mode of the present invention is:

The steps for using this utility model are as follows: 1. Based on the cantilever length and overall size of the cover beam, initially determine the length and size of the bracket upper chord beam 1a, the bracket lower chord beam 1b, and the bracket web beam 1c, and perform stress calculations to ensure the strength, Deformation and stability meet the requirements, the bracket shape is finally determined, and prefabricated, assembled or connected in the factory;

2. Determine the positions of the left and right pier columns supporting the round steel 5 according to the cross slope of the cap beam, and embed corrugated pipes as reserved holes for supporting the round steel 5 before pouring the pier columns;

3. Insert the limiter 4 into the reserved hole of the pier, place the mounting base 3 on the 4 set of limiters, put the support 2 into the mounting base 3, and adjust the height of the support 2;

4. Lift the welded bracket body 1 and place it on the support member 2, and adjust the height difference of the support member 2 again to make the top cross slope of the upper chord beam 1a of the bracket consistent with the cross slope of the cover beam;

5. Use pull screws to tie the end support bodies 9 on the left and right sides of the bridge pier 11 together;

6. Evenly lay the bottom support body 5 on the top surface of the upper chord beam 1a of the bracket, and perform spot welding.

7. Measure and set out the line, and place the bottom mold support frame 6 on the bottom support body 5;

8 Install fence 11;

9. Carry out subsequent operations such as steel bar installation for cover beams, formwork installation, concrete pouring, etc.;

10. After the maintenance of the cover beam is completed, the brackets should be dismantled according to the principle of supporting first and then dismantling, and then dismantling the last support first for turnover use.

During the entire above-mentioned implementation process, in the present utility model, the upper chord beam 1a of the bracket is made of 63#b type I-beam steel, and the lower chord beam 1b of the bracket and the bracket web beam 1c are made of 45#b type I-beam steel. The clear distance between the bracket upper chord beam 1a and the bracket lower chord beam 1b is determined at 2.5m~3.0m, and the bracket web beam 1c is determined at an oblique direction of 45°~60°. Gas-shielded welding is used between the three to ensure welding quality. The upper chord beam 1a of the bracket and the lower chord beam 1b of the bracket are pulled against each other by tension screws near the sides of the piers to prevent the brackets from sliding. The other positions are pulled against each other every 1m. The pull screw is made of M20 fine-rolled rebar.

The mounting base 3 in this utility model is made of 22#a channel steel, the limiting part 4 is made of Φ100mm steel rod, and the supporting part 2 is made of a 50t self-locking jack. Two supports 2 are used on one side of a single pier column, which not only provides sufficient support force, but also increases the contact point between the upper chord beam 1a of the bracket and the jack, which can further prevent the bracket from sliding. The jack positions of the two left and right pier columns are determined by the transverse slope of the cap beam, so that the height difference of the jacks on both sides is consistent with the transverse slope of the cap beam.

The bottom support body 5 and the middle support body 7 in this utility model are made of 10# I-beam steel, and the spacing is arranged according to 50cm. The bottom support body 5 and the middle support body 7 are spot welded with the bracket upper chord beam 1a to prevent sliding. At the same time, There are hollow cavities for the bridge piers to pass through between the middle support body 7 and the two bottom support bodies 5 respectively.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention in other forms. Any skilled person familiar with the art may make changes using the technical contents disclosed above. Or modified into equivalent embodiments with equivalent changes. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims (10)

1. An anti-sideslip double jack type long cantilever cover beam formwork bracket system, which is characterized by including: The bracket body (1) is used as a support for the long cantilever cover beam formwork; There are a plurality of supports (2). The fixed end of each support (2) is placed on a pair of limiting parts (4) through the mounting seat (3). The working end of the support (2) is in contact with the bracket body ( 1) Overlapping to form the support system of the bracket body (1); The limiting piece (4) is installed in the reserved hole of the bridge pier column; The bottom support body (5) is symmetrically arranged on both sides of the top and upper end of the bracket body (1); The bottom mold support frame (6) is placed above the bottom support body (5) respectively, and is used as a bracket system for the bottom mold of the cover beam; The middle support body (7) is provided at the top middle of the bracket body (1); The side protection support body (8) is symmetrically installed on both sides of the upper part of the bracket body (1); The end support body (9) is symmetrically arranged at both ends of the side protection support body (8); and each end support body (9) is installed on each bottom mold support through a pull screw. The end of the frame (6) forms an overall stress-bearing structure. 2. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 1, characterized in that the bracket body (1) includes: Bracket upper chord beams (1a), the bracket upper chord beams (1a) are two arranged opposite to each other, and the two bracket upper chord beams (1a) are detachably connected as a whole through tension screws; Bracket lower chord beams (1b), the bracket lower chord beams (1b) are two relatively parallel to each other, and the two bracket lower chord beams (1b) are detachably connected as a whole through tension screws; The bracket web beam (1c) is symmetrically connected between the bracket upper chord beam (1a) and the bracket lower chord beam (1b) to form a whole. 3. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 2, characterized in that the bracket upper chord (1a) and the bracket lower chord (1b) and The bracket web beams (1c) are all I-beams. 4. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 1, characterized in that the support member (2) is a jack; The mounting base (3) is a U-shaped or C-shaped channel steel with an upward opening. 5. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 1, characterized in that the limiter (4) is a supporting round steel or steel bar; The bottom support body (5) and the middle support body (7) are both made of multiple square steels arranged in rows at equal distances and connected to the bracket body (1) to form a hollow knot frame body. 6. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 1, characterized in that the bottom formwork support frame (6) includes: first support frame (6a), the second support frame (6b), the second support frame (6b) is connected to the first support frame (6a) to form a whole; And the first support frame (6a) and the second support frame (6b) are triangular supports formed by multiple U-shaped or C-shaped channel steels that are assembled and welded to each other. 7. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 1, characterized in that the side protection support body (8) is composed of a plurality of protective formwork pieces with different shapes and sizes. (8a) It is composed of bolt components connected to each other in sequence. 8. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 1, characterized in that the end support body (9) includes: L-shaped brackets (9a), which are two L-shaped brackets (9a) arranged relatively parallel to each other; Support plate (9b), the support plate (9b) is connected to the top surface of the L-shaped bracket (9a); The end plate (9c) is detachably installed on one end of the L-shaped bracket (9a) through a pull screw. 9. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to claim 8, characterized in that the L-shaped bracket (9a) is made of a transverse I-beam and is vertically connected to the transverse I-beam. It consists of vertical I-beams at either end of the I-beam. 10. An anti-sideslip double jack type long cantilever cover beam formwork bracket system according to any one of claims 1 to 9, characterized in that it also includes: The enclosure (10) is located around the top of the bottom support body (5) and the middle support body (7). The enclosure (10) is made of lightweight assembled steel wire mesh and support steel bars and is connected to each other. Become.