Construction method for abutting against cantilever supporting beam through floor and punching-free cantilever scaffold

Abstract

The invention relates to the technical field of cantilever supporting beam installation, in particular to a construction method for abutting against a cantilever supporting beam through a floor and a punching-free cantilever scaffold. A cantilever layer, a tensioning layer and a positioning layer are selected, a supporting beam is installed in the cantilever layer, and a tensioning beam is installed in the tensioning layer; the supporting beam and the tensioning beam are fixed in the cantilever layer and the tensioning layer in an abutting mode through the abutting assemblies, construction of installing the supporting beam and the tensioning beam indoors is achieved, and safety is improved; meanwhile, the grooves are formed in the cantilever layer and the tensioning layer, so that the tail end of the supporting beam located in the cantilever layer and the tail end of the tensioning beam located in the tensioning layer are prevented from swinging, and the stability is enhanced; the anti-skid grooves are formed in the grooves, the anti-skid strips matched with the anti-skid grooves are arranged on the supporting beams and the tensioning beams, the anti-skid strips can be placed in the anti-skid grooves, sliding of the supporting beams and the tensioning beams is avoided, and the overall stability and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cantilever support beam installation, and in particular to a construction method for cantilever support beams by utilizing floors to support them, and a punch-free cantilever scaffold. Background Art

[0002] Scaffolding refers to various supports erected at the construction site to facilitate workers' construction operations and solve vertical and horizontal transportation problems. It is mainly used in exterior wall construction, interior decoration or places where high-rise buildings cannot be directly constructed at construction sites. Traditional scaffolding uses steel pipe fasteners to be erected from the bottom of the building upwards layer by layer, which not only leads to a long erection period, but also requires a large number of steel pipe fasteners, which is costly. At the same time, with the continuous construction of high-rise buildings, the construction of the building that has been built at the bottom needs to wait until the construction of the top is completed before the scaffolding can be readjusted or erected for decoration and other construction processes, resulting in a long completion period for the entire building. In addition, traditional scaffolding is difficult to meet the construction needs of certain parts of the building (such as balconies, etc.). Therefore, the erection of cantilever scaffolding has attracted the attention of technicians in this field, and corresponding research has been carried out.

[0003] For example: Patent No. 201520358296.4 discloses a high-altitude steel cantilever support system, which uses a cantilever member fixedly connected to the upper surface of the first floor slab, the other end of the cantilever member extends to the outside of the first floor slab, and the oblique support member is connected to the second floor slab below the first floor slab, and the top of the oblique support member is hinged to the cantilever member. The hinged connection method avoids the use of rigid connection at the node, eliminates the stress caused by deformation or angular deviation of the steel section when subjected to force, and prevents the steel section from being damaged; however, during installation, it is necessary to pre-embed steel plates in the first floor slab, resulting in higher costs.

[0004] For another example: Patent No. 202021028151.5 discloses a cantilever scaffolding, including a pre-buried steel plate, a channel steel fixedly welded on the right side of the top of the pre-buried steel plate, an I-beam welded on the top of the channel steel, a positioning short steel bar welded on the top of the I-beam, and a steel pipe scaffolding welded on the top of the positioning short steel bar. A round steel clamp is clamped between the I-beam and the pre-buried steel plate, and a scaffolding board is set at the upper end of the steel pipe scaffolding. It can be seen that in this method, the pre-buried steel plate is embedded in the building, and the support of the channel steel, I-beam, etc. is achieved through the pre-buried steel plate, thereby constructing a cantilever scaffolding support structure. However, the pre-buried steel plate increases the construction cost, and the scaffolding construction is difficult and takes a long time.

[0005] For another example: Patent No. 202221519532.2 discloses a temporary tie-down structure for a scaffold, comprising a cantilever layer and a non-cantilever layer, wherein multiple non-cantilever layers are located between two cantilever layers, and a cantilever section is extended on the cantilever layer, with scaffolding attached and installed on the outside of the cantilever section at both ends, and the middle of the scaffold is spaced from the non-cantilever layer, and the middle and bottom of the scaffold are fixedly connected to the non-cantilever layer via a tension assembly, and the tension assembly is obliquely connected and installed from the scaffold to the non-cantilever layer, and the second tension tube and the first tension tube are both round steel tubes with a diameter of φ22 and the basket screw is an M30 basket screw. When the inclination angle of the tension assembly from the scaffold to the non-cantilever layer is 62°, when the scaffold itself and the work objects on the scaffold generate a downward load of 66.8KN, the problem that the existing temporary tie-down structure of the scaffold cannot meet the technical requirements of this construction is solved. However, it can be seen from this technical solution that the cantilever scaffolding support beam structure in the prior art is to use a cantilever section and a cantilever layer to be integrally formed or to install an I-beam on a concrete wall by bolts, and then the tension component (basket screw inclined tension) and the upper non-cantilever layer are connected by bolts for tensioning, which can easily lead to mechanical damage at the junction of the tension component and the non-cantilever layer, making it difficult to repair, and even causing leakage and seepage.

[0006] From the above, it can be seen that when cantilever scaffolding is erected in the prior art, a support beam structure system is required for the cantilever scaffolding. The support beam structure system is usually connected to the building using steel sections, and then combined with a cable-stayed structure or a diagonal bracing structure to form a stable scaffolding support beam or platform structure, thereby meeting the cantilever requirements. However, the following technical problems still exist in the prior art when using a support beam structure to erect cantilever scaffolding: ① Pre-embedded steel plates are required to facilitate the connection of the I-beam structure as a beam, which not only results in a high cost for the construction of the concrete floor, but also makes the construction more difficult due to the difficulty in connecting the I-beam and the pre-embedded steel plates; ② When bolts are used to connect the I-beam or the cable-stayed or diagonal bracing structure to the concrete structure, the concrete wall is damaged. After the subsequent demolition, the damaged part is difficult to repair, and water seepage and leakage often occur. Summary of the Invention

[0007] Based on the above technical problems, the present invention provides a construction method for cantilever support beams using floors to tighten cantilever support beams and a punch-free cantilever scaffolding, which utilizes the space between floors to install the tightness and combines the installation of support beams and tensioning beams to avoid damage to concrete walls, avoid pre-embedded steel plates, and reduce the cost of cantilever scaffolding construction; at the same time, the construction of the cantilever scaffolding is transferred from the initial construction to the internal construction of the cantilever layer and the tensioning layer, which helps to improve construction safety.

[0008] The specific technical solutions are:

[0009] One of the purposes of the present invention is to provide a construction method for cantilevered support beams by using floors to support them, comprising the following steps:

[0010] S1: Select the cantilever layer, tension layer and positioning layer according to the floor where the exterior wall is to be cantilevered;

[0011] S2: A groove is formed in the tensioning layer from the edge to the tensioning layer, and a groove is formed in the cantilever layer from the edge to the cantilever layer; a plurality of anti-slip grooves are formed in the groove along a direction perpendicular to the length of the groove;

[0012] S3: Fixing a tensioning assembly at one end of the tensioning beam and installing an anti-slip strip that matches the anti-slip groove on the tensioning beam; placing the tensioning beam into the groove in the tensioning layer so that the end of the tensioning assembly is flush with the edge of the tensioning layer and the anti-slip strip is placed in the anti-slip groove; installing a tightening assembly between the tensioning beam and the lower surface of the positioning layer so that the tensioning beam is tightened and fixed in the groove;

[0013] S4: Place the other end of the tensioning component from the tensioning layer into the cantilever layer, and fix it on the upper surface of one end of the support beam or near one end; install an anti-slip strip that matches the anti-slip groove on the support beam; push one end of the support beam where the tensioning component is installed out of the cantilever layer to tighten the tensioning component, and place the support beam into the groove in the cantilever layer so that the anti-slip strip is placed in the anti-slip groove. Use the tightening component to install it between the support beam and the lower surface of the tensioning layer so that the support beam is tightened and fixed in the groove.

[0014] After selecting the cantilever layer, tensioning layer and positioning layer, the support beam is installed in the cantilever layer, the tensioning beam is installed in the tensioning layer, and the support beam and the tensioning beam are fixed in the cantilever layer and the tensioning layer by using a tightening assembly, thereby realizing the construction of installing the support beam and the tensioning beam indoors and improving safety; at the same time, grooves are opened in the cantilever layer and the tensioning layer to avoid the swinging of the tail end of the support beam in the cantilever layer and the tail end of the tensioning beam in the tensioning layer, thereby enhancing stability; anti-slip grooves are provided in the grooves, and anti-slip strips matching the anti-slip grooves are provided on the support beam and the tensioning beam, and the anti-slip strips can be placed in the anti-slip grooves to avoid the sliding of the support beam and the tensioning beam, thereby improving overall stability and safety; and the tensioning beam is connected to the support beam by using a tensioning assembly, and the tensioning assembly is tightened, so that the tensioning beam and the support beam at the cantilever end form a whole, thereby improving overall stability.

[0015] During construction, the groove in the cantilever layer should be located at the position where the groove in the tension layer is projected from the tension layer into the cantilever layer. This helps to ensure that the support beam and the tension beam are parallel and enhance stability.

[0016] To ensure secure engagement of the support beams and / or tension beams, prevent swinging and sliding, and prevent excessive damage to the floor slab, the grooves are preferably 3-5 cm deep, and the anti-slip grooves are 2-3 cm deep. In a more preferred construction solution, these dimensions can be adjusted as needed, as long as the grooves and anti-slip grooves are deep enough to expose the reinforcement bars.

[0017] In order to ensure high stability of the support beam and the tensioning beam and improve safety, it is preferred that the tensioning assembly includes a plurality of vertical poles and connecting rods and connecting pieces for connecting the plurality of vertical poles into a whole; when used to fix the support beam during construction, the vertical poles are installed between the upper surface of the support beam and the lower surface of the tensioning layer, so that the bottom end of the vertical pole is pressed against the upper surface of the support beam, and the top end of the vertical pole is pressed against the lower surface of the tensioning layer, and then the connecting rods and connecting pieces are used to connect the adjacent vertical poles into a whole; when used to fix the tensioning beam during construction, the vertical poles are installed between the upper surface of the tensioning beam and the lower surface of the positioning layer, so that the bottom end of the vertical pole is pressed against the upper surface of the tensioning beam, and the top end of the vertical pole is pressed against the lower surface of the positioning layer, and then the connecting rods and connecting pieces are used to connect the adjacent vertical poles into a whole. More preferably, the clamping assembly also includes an L-shaped pressure plate. When it is used to fix the support beam during construction, part of the L-shaped pressure plate is placed on the end of the support beam located in the cantilever layer, and the other part is placed on the upper surface of the cantilever layer; the vertical pole is then used to clamp between the upper surface of the L-shaped pressure plate and the lower surface of the tensioning layer, so that the bottom end of the vertical pole is pressed against the upper surface of the L-shaped pressure plate, and the top end of the vertical pole is pressed against the lower surface of the tensioning layer; when it is used to fix the tensioning beam during construction, part of the L-shaped pressure plate is placed on the end of the tensioning beam located in the tensioning layer, and the other part is placed on the upper surface of the tensioning layer; the vertical pole is then used to clamp between the upper surface of the L-shaped pressure plate and the lower surface of the positioning layer, so that the bottom end of the vertical pole is pressed against the upper surface of the L-shaped pressure plate, and the top end of the vertical pole is pressed against the lower surface of the positioning layer.

[0018] In order to avoid relative displacement of the L-shaped plate, it is preferred that the L-shaped pressure plate is provided with a number of anti-slip structures, and anti-slip components that can match the anti-slip structures are provided on the support beam, the tensioning beam, the upper surface of the cantilever layer and the upper surface of the tensioning layer at the contact positions with the L-shaped pressure plate.

[0019] The anti-slip structure in the present invention is a recessed pattern, and the anti-slip component is a protruding pattern that fits into the recessed pattern. Furthermore, the anti-slip structure and anti-slip component structures used in the present invention can be similar to the matching between anti-slip grooves and anti-slip strips. Alternatively, a number of friction-enhancing construction methods, such as installing rubber pads, can be employed.

[0020] In order to enhance the overall stability of the clamping assembly and the clamping effect, preferably, the clamping assembly also includes a diagonal brace and / or fasteners for installation between adjacent vertical poles; the fasteners are welded using steel bars.

[0021] In order to enhance the flexibility of the tensioning assembly and ensure the stability of the tensioning assembly connection, and improve the overall stability, preferably, the tensioning assembly includes a steel wire rope and fixed plates respectively fixedly installed at both ends of the steel wire rope; the fixed plate located at one end of the steel wire rope is fixedly connected to the upper surface or end of the support beam near the end, and the fixed plate located at the other end of the steel wire rope is fixedly connected to the end of the tensioning beam.

[0022] The second purpose of the invention is to provide a punch-free cantilever scaffolding, which is constructed by installing the cantilever support beam according to the above construction method, and then fixing the scaffolding pole on the cantilever support beam; or constructing the cantilever support beam according to the above construction method, and then fixing the cantilever board on the cantilever support beam, and then fixing the scaffolding pole on the cantilever board.

[0023] Compared with the prior art, the technical effects created by the present invention are embodied in:

[0024] The invention has a simple construction method and converts the traditional scaffolding support structure fixed on the exterior wall into an indoor fixed installation, thereby improving the safety of construction workers. At the same time, the floor space is used to set the tightening components, and the space between the upper and lower floors is used to tighten to achieve stable installation, avoiding drilling holes in the exterior wall to damage the wall, and also avoiding the increase in the cost of the required steel plates caused by pre-embedded steel plates.

[0025] This invention utilizes a groove structure of a certain depth indoors, an anti-slip groove within the groove structure, and anti-slip strips on the support beams and tension beams to enhance friction and prevent them from swinging and sliding. Combined with the abutment of the abutment assembly, this enhances overall stability. It also avoids the increased difficulty of repairing by drilling holes in the exterior wall to install the support beams, effectively preventing the risk of water seepage and leakage caused by installing the support beams required for cantilever scaffolding, and improving construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to facilitate those skilled in the art to fully understand the technical solution of the present invention, the following description is made of the provided drawings in combination with the content of the technical solution and the provided drawings.

[0027] Figure 1 Create an overall process flow diagram for the present invention.

[0028] Figure 2 For installation Figure 1 Support beam structure for punch-free cantilever scaffolding in construction sites.

[0029] Figure 3 for Figure 2 Schematic diagram of partial cross-section structure.

[0030] Figure 4 for Figure 2 A schematic structural diagram of another embodiment.

[0031] Figure 5 Schematic diagram of the tension beam structure.

[0032] Figure 6 Schematic diagram of the connection structure between the tensioning beam and the tensioning assembly.

[0033] Figure 7 for Figure 6 A schematic structural diagram of another embodiment.

[0034] 1- Cantilever layer 2- Tensioning layer 3- Positioning layer 4- Support beam 5- Tensioning beam 6- Vertical pole 7- Connecting rod 8- Connecting piece 9- L-shaped pressure plate 10- Fixed plate 11- Scaffolding pole 12- Steel wire rope 13- Groove 14- Anti-slip groove 15- Anti-slip strip 16- Diagonal brace 17- Fastener 18- Threaded hole 19- Bolt. DETAILED DESCRIPTION

[0035] In order to facilitate those skilled in the art to correctly understand the present invention and enable those skilled in the art to fully understand the technical content of the present invention, the technical solution of the present invention is further explained below in conjunction with specific implementation methods, but this explanation does not limit the scope of protection required for the present invention. The scope of protection of the present invention by those skilled in the art cannot be limited to the following explanations. Any equivalent replacement or change made by any those skilled in the art or persons familiar with the technology in this field, on the basis of the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0036] like Figure 1 And such as Figure 2-7 As shown, in some embodiments, a construction method for cantilevered support beams using floors includes the following steps:

[0037] S1: Select cantilever layer 1, tensioning layer 2 and positioning layer 3 according to the floor where the exterior wall is to be cantilevered; realize the positioning and selection of the exterior wall construction at the required cantilever scaffolding to meet the cantilever scaffolding construction requirements;

[0038] S2: A groove 13 is opened in the tensioning layer 2 from the edge to the tensioning layer 2 (the corresponding groove 13 can be formed during the floor pouring or cut by a cutting machine after the concrete pouring construction is completed), and a groove 13 is opened in the cantilever layer 1 from the edge to the cantilever layer 1; a plurality of anti-slip grooves 14 are opened in the groove 13 along the direction perpendicular to the length of the groove 13; this can effectively prevent the tensioning beam 5 and the support beam 4 from swinging and sliding, thereby enhancing stability;

[0039] S3: Fix (weld, bolt or integrally form) a tensioning assembly at one end of the tensioning beam 5, and install an anti-slip strip 15 matching the anti-slip groove 14 on the tensioning beam 5; place the tensioning beam 5 into the groove 13 located in the tensioning layer 2, so that one end of the tensioning assembly is flush with the edge of the tensioning layer, and the anti-slip strip 15 is placed in the anti-slip groove 14; use a tightening assembly to be installed between the tensioning beam 5 and the lower surface of the positioning layer 3, so that the tensioning beam 5 is tightened and fixed in the groove 13; so that the tensioning beam 5 is stably installed in the tensioning layer 2, the stability of the tensioning beam 5 is enhanced, and the problems of sliding, swinging, etc. are effectively avoided, thereby improving the overall stability;

[0040] S4: Place the other end of the tensioning assembly from the tensioning layer 2 into the cantilever layer 1, and fix it (weld, bolted or integrally formed) on the upper surface of one end of the support beam 4 or near one end; install an anti-slip strip 15 that matches the anti-slip groove 14 on the support beam 4; push one end of the support beam 4 where the tensioning assembly is installed out of the cantilever layer 1 to tighten the tensioning assembly, and place the support beam 4 into the groove 13 located in the cantilever layer 1 so that the anti-slip strip 15 is placed in the anti-slip groove 14. Use the tightening assembly to install it between the support beam 4 and the lower surface of the tensioning layer 2 so that the support beam 4 is tightened and fixed in the groove 13. This allows the support beam 4 to be stably installed in the cantilever layer 1, enhancing the stability of the support beam 4, effectively avoiding problems such as sliding and swinging, and improving overall stability. During construction, it should be ensured that the groove in the cantilever layer is at the position where the groove in the tensioning layer is projected from the tensioning layer into the cantilever layer. This helps to ensure that the support beam and the tensioning beam are parallel, enhancing stability.

[0041] In some embodiments, the depth of the groove 13 is 3-5 cm, and the depth of the anti-slip groove 14 is 2-3 cm. In a more preferred construction plan, the size control can be adjusted as needed, as long as the groove 13 and the anti-slip groove 14 are opened, and their depth does not cause exposed reinforcement in the floor. At the same time, it is necessary to ensure that the support beam 4 and the tension beam 5 can be limited to prevent the support beam 4 and the tension beam 5 from swinging or sliding, thereby enhancing the overall stability. The groove 13 and the anti-slip groove 14 can be formed during the concrete pouring construction, or they can be cut later; and the anti-slip strips 15 on the support beam 4 and the tension beam 5 should be welded with a strip-shaped rigid structure that can match the anti-slip groove 14, such as welding a number of steel bars, steel plates, etc. on the support beam 4 and the tension beam 5.

[0042] like Figure 2 、 Figure 3 and Figure 4As shown, in some embodiments, the tightening assembly includes a plurality of vertical poles 6 and connecting rods 7 (steel pipes) and connecting pieces 8 (bolts, snaps or other conventional technical means for fixed connection) for connecting the plurality of vertical poles 6 (steel pipes) into a whole; when used to fix the support beam 4 during construction, the vertical poles 6 are installed between the upper surface of the support beam 4 and the lower surface of the tensioning layer 2, so that the bottom end of the vertical pole 6 is pressed against the upper surface of the support beam 4, and the top end of the vertical pole 6 is pressed against the lower surface of the tensioning layer 2, and then the connecting rods 7 and the connecting pieces 8 are used to connect the adjacent vertical poles 6 into a whole; when used to fix the tensioning beam 5 during construction, the vertical poles 6 are installed between the upper surface of the tensioning beam 5 and the lower surface of the positioning layer 3, so that the bottom end of the vertical pole 6 is pressed against the upper surface of the tensioning beam 5, and the top end of the vertical pole 6 is pressed against the lower surface of the positioning layer 3, and then the connecting rods 7 and the connecting pieces 8 are used to connect the adjacent vertical poles 6 into a whole. In some embodiments, the abutting assembly further includes a diagonal brace 16 and / or a fastener 17 for installation between adjacent uprights 6; the fastener 17 is welded from steel bars to improve the integrity of the device and enhance stability.

[0043] like Figure 2 、 Figure 3 and Figure 4 As shown, in some embodiments, the tightening assembly further includes an L-shaped pressing plate 9. When used to fix the support beam 4, the L-shaped pressing plate 9 is partially placed on the end of the support beam 4 located in the cantilever layer 1, and the other part is placed on the upper surface of the cantilever layer 1. Then, the vertical rod 6 is used to press between the upper surface of the L-shaped pressing plate 9 and the lower surface of the tensioning layer 2, so that the bottom end of the vertical rod 6 presses against the upper surface of the L-shaped pressing plate 9, and the top end of the vertical rod 6 presses against the lower surface of the tensioning layer 2. When used to fix the tensioning beam 5, the L-shaped pressing plate 9 is partially placed on the end of the tensioning beam 5 located in the tensioning layer 2, and the other part is placed on the upper surface of the tensioning layer 2. Then, the vertical rod 6 is used to press between the upper surface of the L-shaped pressing plate 9 and the lower surface of the positioning layer 3, so that the bottom end of the vertical rod 6 presses against the upper surface of the L-shaped pressing plate 9, and the top end of the vertical rod 6 presses against the lower surface of the positioning layer 3. This effectively prevents the tail end (left end) of the support beam 4 and the tensioning beam 5 from tilting upward, thereby enhancing stability.

[0044] In some embodiments, the L-shaped pressure plate 9 is provided with a number of anti-slip structures, and anti-slip components that can match the anti-slip structure are provided at the contact positions of the support beam 4, the tension beam 5, the upper surface of the cantilever layer 1, and the upper surface of the tension layer 2 with the L-shaped pressure plate 9. In this way, under the interaction of the anti-slip structure and the anti-slip component, the L-shaped pressure plate 9 can be effectively prevented from relative displacement relative to the support beam 4 and the tension beam 5, thereby improving stability and enhancing safety. In some embodiments, the anti-slip structure is a concave pattern, and the anti-slip component is a convex pattern that can match and sink into the concave pattern. The friction force is enhanced by the mutual matching between the concave pattern and the convex pattern, which effectively prevents the L-shaped pressure plate 9 from relative displacement relative to the support beam 4 and the tension beam 5, thereby enhancing stability. In addition, in other embodiments, the invention can also adopt the method of adding rubber pads or other methods of enhancing friction.

[0045] like Figure 2 、 Figure 3 and Figure 4 As shown, in certain embodiments, the tensioning assembly includes a steel wire rope 12 and a fixing plate 10 (steel plate) fixedly installed (welded, bolted or integrally formed) at both ends of the steel wire rope 12; the fixing plate 10 located at one end of the steel wire rope 12 is fixedly connected to the upper surface or end of the support beam 4 near the end, and the fixing plate 10 located at the other end of the steel wire rope 12 is fixedly connected (welded, bolted or integrally formed) to the end of the tensioning beam 5. The flexible connection of the steel wire rope 12 facilitates the construction and installation of the support beam 4 and the tensioning beam 5, and enhances the flexibility of the connection between the tensioning beam 5 and the support beam 4, eliminates the stress caused by the angular deviation of the support beam 4 and the tensioning beam 5, prevents the support beam 4 and the tensioning beam 5 from becoming unstable and damaging, and improves safety. The support beam 4 and the tensioning beam 5 used in the present invention are not steel sections. In addition, when the fixing plate 10 is installed on the support beam 4 and the tensioning beam 5 for fixed connection, it can be bolted, such as Figure 5 、 Figure 6 、 Figure 7 As shown, a threaded hole 18 is provided on the tensioning beam 5, and the fixing plate 10 is fastened and fixedly installed on the end of the tensioning beam 5 by using a bolt 19; a connection position can also be provided on the support beam 4, a threaded hole is provided on the connection position, and the fixing plate 10 is fastened and fixedly installed on the end of the support beam 4 or on the upper surface near the end by using a bolt 19, so that the fixing plate 10 is fixedly connected to the support beam 4.

[0046] After constructing the cantilever support beam structure using the above-described construction method, a cantilever slab is then laid on the support beam 4 cantilevered from the cantilever layer 1. During installation, the cantilever slab can be fixed to the support beam 4 using bolts, and then scaffolding rods 11 are installed on the cantilever slab to obtain a cantilever scaffold. Alternatively, the bottom end of the scaffolding 11 is fixedly connected (welded or bolted) to the support beam 4 cantilevered from the cantilever layer 1, and then the scaffolding is constructed using traditional steel pipe installation methods to obtain a cantilever scaffold. Laying the cantilever slab is a more superior construction method, which helps to enhance safety.

[0047] Other matters not covered by the present invention may be realized by conventional technical means with reference to the prior art or common knowledge known to those skilled in the art, such as: scaffolding construction, connection between adjacent poles, etc.

Claims

1. A construction method for cantilevered support beams by using floors, characterized in that: The following steps are involved: S1: Select a cantilever layer (1), a tensioning layer (2), and a positioning layer (3) according to the floor where the exterior wall is to be cantilevered; S2: a groove (13) is provided in the tensioning layer (2) from the edge to the tensioning layer (2), and a groove (13) is provided in the cantilever layer (1) from the edge to the cantilever layer (1); a plurality of anti-slip grooves (14) are provided in the groove (13) along a direction perpendicular to the length of the groove (13); S3: A tensioning assembly is fixedly installed at one end of the tensioning beam (5), and an anti-slip strip (15) matching the anti-slip groove (14) is installed on the tensioning beam (5); the tensioning beam (5) is placed in the groove (13) located in the tensioning layer (2), so that one end of the tensioning assembly is flush with the edge of the tensioning layer, and the anti-slip strip (15) is placed in the anti-slip groove (14); a tightening assembly is installed between the tensioning beam (5) and the lower surface of the positioning layer (3), so that the tensioning beam (5) is tightened and fixed in the groove (13); S4: Place the other end of the tensioning component from the tensioning layer (2) into the cantilever layer (1), and fix it on one end of the support beam (4) or on the upper surface near one end; install an anti-slip strip (15) that matches the anti-slip groove (14) on the support beam (4); push the end of the support beam (4) on which the tensioning component is installed out of the cantilever layer (1) to tighten the tensioning component, and place the support beam (4) into the groove (13) located in the cantilever layer (1), so that the anti-slip strip (15) is placed in the anti-slip groove (14), and use the tightening component to be installed between the support beam (4) and the lower surface of the tensioning layer (2), so that the support beam (4) is tightened and fixed in the groove (13).

2. The construction method of using floors to press against cantilevered support beams as claimed in claim 1, characterized in that: The depth of the groove (13) is 3-5 cm, and the depth of the anti-slip groove (14) is 2-3 cm.

3. The construction method of using floors to press against cantilevered support beams as described in claim 1 or 2, characterized in that: When the groove (13) and the anti-slip groove (14) are opened, their depths do not cause the reinforcement of the floor to be exposed.

4. The construction method of using floors to press against cantilevered support beams as claimed in claim 1, characterized in that: The tightening assembly comprises a plurality of vertical rods (6) and a connecting rod (7) and a connecting piece (8) for connecting the plurality of vertical rods (6) into a whole; when used for fixing the support beam (4), the vertical rods (6) are installed between the upper surface of the support beam (4) and the lower surface of the tensioning layer (2), so that the bottom end of the vertical rod (6) is pressed against the upper surface of the support beam (4), and the top end of the vertical rod (6) is pressed against the lower surface of the tensioning layer (2), and then the connecting rod (7) and the connecting piece (8) are used to connect the adjacent vertical rods (6) into a whole; when used for fixing the tensioning beam (5), the vertical rods (6) are installed between the upper surface of the tensioning beam (5) and the lower surface of the positioning layer (3), so that the bottom end of the vertical rod (6) is pressed against the upper surface of the tensioning beam (5), and the top end of the vertical rod (6) is pressed against the lower surface of the positioning layer (3), and then the connecting rod (7) and the connecting piece (8) are used to connect the adjacent vertical rods (6) into a whole.

5. The construction method of using floors to press against cantilevered support beams as claimed in claim 4, characterized in that: The tightening assembly also includes an L-shaped pressing plate (9). When used to fix the support beam (4), part of the L-shaped pressing plate (9) is placed on the end of the support beam (4) located in the cantilever layer (1), and the other part is placed on the upper surface of the cantilever layer (1); then the vertical rod (6) is used to tighten between the upper surface of the L-shaped pressing plate (9) and the lower surface of the tensioning layer (2), so that the bottom end of the vertical rod (6) is pressed against the upper surface of the L-shaped pressing plate (9), and the top end of the vertical rod (6) is pressed against the tensioning layer (2). The lower surface of the layer (2); when used to fix the tensioning beam (5), the L-shaped pressing plate (9) is partially placed on the end of the tensioning beam (5) located in the tensioning layer (2), and the other part is placed on the upper surface of the tensioning layer (2); and the vertical rod (6) is then used to press tightly between the upper surface of the L-shaped pressing plate (9) and the lower surface of the positioning layer (3), so that the bottom end of the vertical rod (6) presses tightly against the upper surface of the L-shaped pressing plate (9) and the top end of the vertical rod (6) presses tightly against the lower surface of the positioning layer (3).

6. The construction method of using floors to press against cantilevered support beams as claimed in claim 5, characterized in that: The L-shaped pressing plate (9) is provided with a plurality of anti-slip structures, and anti-slip components that can match the anti-slip structures are provided at the contact positions of the support beam (4), the tensioning beam (5), the upper surface of the cantilever layer (1) and the upper surface of the tensioning layer (2) with the L-shaped pressing plate (9).

7. The construction method of using floors to press against cantilevered support beams as claimed in claim 6, characterized in that: The anti-slip structure is a concave pattern, and the anti-slip component is a convex pattern that can match and sink into the concave pattern.

8. The construction method of using floors to press against cantilevered support beams as described in claim 4 or 5, characterized in that: The tightening assembly further comprises a diagonal brace (16) and / or a fastener (17) for being installed between adjacent upright poles (6); the fastener (17) is welded using steel bars.

9. The construction method of using floors to press against cantilevered support beams as claimed in claim 1, characterized in that: The tensioning assembly includes a steel wire rope (12) and fixed plates (10) respectively fixedly installed at both ends of the steel wire rope (12); the fixed plate (10) located at one end of the steel wire rope (12) is fixedly connected to the upper surface or end of the support beam (4) near the end, and the fixed plate (10) located at the other end of the steel wire rope (12) is fixedly connected to the end of the tensioning beam (5).

10. A punch-free cantilever scaffolding, characterized in that: The cantilever support beam is constructed and installed according to the construction method described in any one of claims 1 to 9, and then the scaffolding rod (11) is fixedly installed on the cantilever support beam; or the cantilever support beam is constructed and installed according to the construction method described in any one of claims 1 to 9, and then the cantilever plate is fixedly laid on the cantilever support beam, and then the scaffolding rod (11) is fixedly installed on the cantilever plate.

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