Unconventional cantilever scaffold and erecting method thereof

Abstract

The invention relates to the technical field of constructional engineering, and discloses an unconventional overhanging scaffold and an erecting method thereof.The unconventional overhanging scaffold is erected on a floor and a side beam of a building structural body and comprises an overhanging mechanism and a plurality of embedded anchoring mechanisms, the overhanging mechanism comprises a main beam rod, a short vertical rod and an inclined supporting rod which are fixedly connected together, and the main beam rod is arranged on the top face of the floor; one end of the main beam rod extends out of a floor to form a cantilever end, the short vertical rod is located on the bottom face of the cantilever end of the main beam rod and used for abutting against the side beam, and the inclined strut is located between the side, away from the side beam, of the short vertical rod and the bottom face of the cantilever end of the main beam rod. According to the cantilever scaffold, the construction difficulty is reduced, and compared with a conventional cantilever scaffold which is obliquely pulled through a steel wire rope, the cantilever scaffold has the advantages that the construction difficulty is reduced, the construction speed is high, the safety is high, the cantilever scaffold can be recycled and repeatedly used, waste materials are not generated, and the green construction requirement is met.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering, and in particular to an unconventional cantilever scaffold and an erection method thereof. Background Art

[0002] In recent years, with the rapid development of civil construction, building heights have continued to increase. Especially in the current situation of tight residential land, civil housing development is mostly high-rise residential buildings. However, due to the large amount of one-time steel pipes and fasteners invested in ground-based scaffolding, as the structural layer increases, ground-based scaffolding cannot meet construction needs.

[0003] At present, cantilever scaffolding is the most commonly used type of scaffolding in high-rise building projects. However, when the cantilever external scaffolding forms an unconventional cantilever scaffolding with an extra-long cantilever end due to special construction requirements, the far end of the horizontal cantilever steel beam has excessive deflection, and it is usually necessary to increase the cross-section of the cantilever steel beam or add an upper inclined-stayed structure to control it. Not only is the construction complicated, but the commonly used inclined-stayed steel wire rope is flexible and tends to stretch after being stressed, which increases the safety risk of the cantilever scaffolding. Summary of the invention

[0004] The object of the present invention is to provide an unconventional cantilever scaffold and an erection method thereof, aiming to solve or improve at least one of the above-mentioned technical problems.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides an unconventional cantilever scaffolding, which is erected on the floor slab and side beams of a building structure, comprising:

[0006] The cantilever mechanism comprises a main beam, a short vertical rod and a diagonal brace rod fixedly connected together, wherein the main beam is arranged on the top surface of the floor slab, one end of the main beam extends out of the floor slab to form a cantilever end, the short vertical rod is located on the bottom surface of the cantilever end of the main beam, the short vertical rod is used to abut against the side beam, and the diagonal brace rod is located between a side of the short vertical rod away from the side beam and the bottom surface of the cantilever end of the main beam;

[0007] A plurality of pre-embedded anchoring mechanisms are arranged on the floor slab, and the pre-embedded anchoring mechanisms are detachably connected to the main beam.

[0008] Optionally, the pre-embedded anchoring mechanism includes:

[0009] A U-shaped bolt anchor ring is arranged on the floor slab, and the main beam rod is located in the inner circle of the U-shaped bolt anchor ring;

[0010] An angle steel is arranged on the top surface of the main beam rod, and the angle steel is detachably connected to the U-bolt anchor ring through a nut.

[0011] Optionally, it further includes a plurality of first steel bars disposed in the floor slab, wherein the first steel bars are used to fix the position of the U-shaped bolt anchor ring.

[0012] Optionally, wooden wedges are provided between the two sides of the main beam and the U-shaped bolt anchor ring.

[0013] Optionally, a wooden board is provided between the floor slab and the main beam.

[0014] Optionally, a plurality of second steel bars are provided on the top surface of the cantilever end of the main beam, and the second steel bars are used for installing internal and external scaffolding steel pipes.

[0015] Optionally, the main beam is steel section.

[0016] Optionally, the short vertical rods and the diagonal bracing rods are channel steels.

[0017] Optionally, there are three pre-embedded anchoring mechanisms, and the distance between two pre-embedded anchoring mechanisms away from the cantilever end of the main beam is 200 mm.

[0018] The present invention also provides a method for erecting an unconventional cantilever scaffold, comprising the following steps:

[0019] Pre-embed a plurality of the pre-embedded anchoring mechanisms on the floor slab;

[0020] The main beam is erected on the floor slab so that the short vertical rods are butted against the side beams and the embedded anchoring mechanism is connected to the main beam.

[0021] The present invention discloses the following technical effects:

[0022] By arranging multiple embedded anchoring mechanisms on the floor that can be detachably connected to the main beam, and pre-arranging the main beam, short vertical rods and diagonal bracing rods that are fixedly connected together, the short vertical rods are used to replace the side beam embedded parts, and can be placed directly on the floor during construction, thereby reducing the construction difficulty. Compared with the conventional cantilever scaffolding with inclined steel wire ropes, the construction difficulty is reduced, the construction speed is fast, the safety is high, it can be recycled and repeatedly used, no waste is generated, and the green construction requirements are met.

[0023] By using short vertical rods to offset the side beams, the short vertical rods, diagonal bracing rods and main beams form a right-angled triangle shape. The diagonal bracing rods can provide an upward supporting force for the main beam, which can greatly reduce the bending moment borne by the main beam and greatly reduce the settlement of the outer end of the main beam. The horizontal component of force transmitted by the diagonal bracing rods is directly borne by the concrete frame beam, and no bending moment is generated on the upper supports of the short vertical rods; the upper supports of the short vertical rods bear the vertical component of force transmitted by the diagonal bracing rods, and the vertical component of force is smaller than the axial force of the diagonal bracing rods, which can solve the deflection problem of large cantilever steel beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the structure of the embedded anchoring mechanism of the present invention.

[0027] In the figure: 1. Main beam; 2. Angle steel; 3. U-shaped bolt anchor ring; 4. Nut; 5. First steel bar; 6. Floor slab; 7. Wooden board; 8. Wooden wedge; 9. Side beam; 10. Internal and external scaffolding steel pipes; 12. Short vertical rod; 13. Diagonal bracing rod; 14. Second steel bar. DETAILED DESCRIPTION

[0028] Cantilever scaffolding is a simple facility used in construction, mainly used for main or decoration engineering operations and safety protection needs in high-rise or super high-rise building construction. It transfers all or part of the scaffolding load to the building structure through supporting structures such as cantilever beams or cantilever trusses, getting rid of the traditional scaffolding's dependence on ground support.

[0029] Internal and external scaffolding steel pipes refer to steel pipes used to build scaffolding, which are mainly used in construction operations. According to their location and function, scaffolding steel pipes can be divided into internal scaffolding steel pipes and external scaffolding steel pipes.

[0030] Internal scaffolding steel pipes are erected inside buildings and are mainly used for masonry of internal and external walls and interior decoration construction. They are characterized by less materials, but frequent installation and disassembly, so they are required to be light and flexible, and easy to install and disassemble. Internal scaffolding steel pipes have various structural forms, including folding type, pillar type and door frame type.

[0031] External scaffolding steel pipe refers to the scaffolding erected outside the building, which is mainly used for exterior wall construction, facade decoration and reinforced concrete engineering. External scaffolding steel pipe has a wide range of uses, including ground-type external scaffolding, hanging scaffolding, cantilever scaffolding and hanging scaffolding.

[0032] The cross-sectional shapes of steel sections are varied, including simple section steel sections (such as square steel, round steel, flat steel, angle steel, etc.) and complex section steel sections (such as I-beams, channels, window frame steel, etc.). The stress characteristics of steel vary depending on its type. Simple section steel sections are usually used in non-load-bearing structures, while complex section steel sections (such as I-beams and channels) are used in load-bearing structures.

[0033] The cross-section of the channel steel is "U"-shaped, with two parallel flanges and the web extending up and down. The steel has high bending and shear strength and is suitable for use as the main load-bearing component.

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] Reference Figure 1-Figure 2 The present invention provides an unconventional cantilever scaffolding, which is erected on the floor slab 6 and the side beam 9 of the building structure, comprising:

[0037] The cantilever mechanism includes a main beam 1, a short vertical rod 12 and a diagonal brace rod 13 that are fixedly connected together. The main beam 1 is arranged on the top surface of the floor 6, one end of the main beam 1 extends out of the floor 6 to form a cantilever end, the short vertical rod 12 is located on the bottom surface of the cantilever end of the main beam 1, the short vertical rod 12 is used to abut against the side beam 9, and the diagonal brace rod 13 is located between the side of the short vertical rod 12 away from the side beam 9 and the bottom surface of the cantilever end of the main beam 1;

[0038] A plurality of pre-embedded anchoring mechanisms are arranged on the floor slab 6 , and the pre-embedded anchoring mechanisms are detachably connected to the main beam 1 .

[0039] By arranging a plurality of embedded anchoring mechanisms on the floor 6 that can be detachably connected to the main beam 1, and pre-arranging the main beam 1, short vertical rods 12 and diagonal bracing rods 13 that are fixedly connected together, the short vertical rods 12 are used to replace the embedded parts of the side beams 9, and can be directly placed on the floor during construction, thereby reducing the construction difficulty. Compared with the conventional cantilever scaffolding using oblique steel wire ropes, the construction difficulty is reduced, the construction speed is fast, the safety is high, it can be recycled and repeatedly used, no waste is generated, and the green construction requirements are met.

[0040] By using short vertical rods 12 to offset the side beams 9, the short vertical rods 12, the diagonal bracing rods 13 and the main beam 1 form a right-angled triangle shape. The diagonal bracing rods 13 can provide an upward supporting force for the main beam 1, which can greatly reduce the bending moment borne by the main beam 1, and greatly reduce the settlement of the outer end of the main beam 1. The horizontal component of force transmitted by the diagonal bracing rods 13 is directly borne by the concrete frame beam, and no bending moment is generated on the upper support of the short vertical rods 12; the upper support of the short vertical rods 12 bears the vertical component of force transmitted by the diagonal bracing rods 13, and the vertical component of force is smaller than the axial force of the diagonal bracing rods 13, which can solve the deflection problem of large cantilever steel beams.

[0041] In one embodiment of the present invention, the pre-embedded anchoring mechanism comprises:

[0042] The U-shaped bolt anchor ring 3 is arranged on the floor 6, and the main beam rod 1 is located in the inner circle of the U-shaped bolt anchor ring 3;

[0043] An angle steel 2 is arranged on the top surface of the main beam rod 1, and the angle steel 2 is detachably connected to the U-bolt anchor ring 3 through a nut 4.

[0044] The main beam 1 is fixed on the floor slab 6 by forming a fixing structure through nuts 4, angle steels 2 and U-bolt anchor rings 3.

[0045] The U-shaped bolt anchor ring 3 is made of φ20mm round steel and is pre-buried in the concrete of the floor slab 6. The U-shaped bolt anchor ring 3 is installed after the reinforcement of the side beam 9 of the floor slab 6 is tied.

[0046] Furthermore, the threaded length of the upper end of the U-shaped bolt anchor ring 3 is 200 mm, and the upper end is rounded.

[0047] In one embodiment of the present invention, a plurality of first steel bars 5 are further included, which are arranged in the floor slab 6 , and the first steel bars 5 are used to fix the position of the U-bolt anchor ring 3 .

[0048] Specifically, there are two first steel bars 5 , which are 1.5 m long φ18HRB335 steel bars. After the U-bolt anchor ring 3 is fixed, the concrete of the floor slab 6 or the side beam 9 is poured.

[0049] In one embodiment of the present invention, wooden wedges 8 are provided between the two sides of the main beam 1 and the U-bolt anchor rings 3 to fix the main beam 1 .

[0050] In one embodiment of the present invention, a wooden board 7 is provided between the floor slab and the main beam to adjust the flatness so that the concrete of the floor slab 6 or the side beam 9 is evenly stressed.

[0051] In one embodiment of the present invention, a plurality of second steel bars 14 are provided on the top surface of the cantilever end of the main beam 1 , and the second steel bars 14 are used to install the internal and external scaffolding steel pipes 10 .

[0052] In one embodiment of the present invention, the main beam 1 is a steel section.

[0053] In one embodiment of the present invention, the short vertical rods 12 and the diagonal bracing rods 13 are channel steels.

[0054] In one embodiment of the present invention, there are three pre-embedded anchoring mechanisms, and the distance between the two pre-embedded anchoring mechanisms far away from the cantilever end of the main beam rod 1 is 200 mm.

[0055] The present invention also provides a method for erecting an unconventional cantilever scaffold, comprising the following steps:

[0056] A plurality of pre-embedded anchoring mechanisms are pre-embedded on the floor 6. Specifically, before pouring concrete, the U-shaped bolt anchor ring 3 is pre-embedded on the floor 6 or the side beam 9, and two first steel bars 5 are pre-embedded to fix the U-shaped bolt anchor ring 3, and then the floor 6 or the side beam 9 concrete is poured;

[0057] The main beam 1 is erected on the floor 6 and the short vertical rod 12 is abutted against the side beam 9 and the embedded anchor mechanism is connected to the main beam 1; specifically, after the concrete of the floor 6 or the side beam 9 reaches the design strength, the cantilever mechanism is installed, and then the angle steel 2 and nut 4 for top pressing are installed, and the wooden board 7 is placed between the main beam 1 and the floor 6. The internal and external scaffolding steel pipes 10 are installed on the cantilever end of the main beam 1 as a cantilever scaffolding. After the main beam 1 is installed in place, the gap between the bottom of the short vertical rod 12 and the side beam 9 is checked one by one. If a gap is found, a wedge-shaped steel plate can be used to fill it tightly and fix it with spot welding.

[0058] Furthermore, before the cantilever mechanism is installed, the main beam 1, short vertical rods 12 and diagonal bracing rods 13 are pre-welded, and the short vertical rods 12 and the diagonal bracing rods 13 are also connected by welding. A second steel bar 14 is welded at the position of the inner and outer scaffolding steel pipes 10 at the cantilever end of the main beam 1 to prevent the inner and outer scaffolding steel pipes 10 from sliding.

[0059] Construction process: Preliminary construction preparation (full-frame of floor 6 or side beam 9, formwork support, and reinforcement binding are completed) → Installation of U-bolt anchor ring 3 → Concrete pouring of floor 6 or side beam 9 → Installation of cantilever mechanism → Installation of embedded anchor mechanism → Erection of cantilever scaffolding → Removal of cantilever scaffolding → Removal of cantilever mechanism → Removal of embedded anchor mechanism.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An unconventional cantilever scaffolding, erected on the floor slab (6) and side beams (9) of a building structure, characterized in that: include: A cantilever mechanism comprises a main beam (1), a short vertical rod (12) and an oblique bracing rod (13) which are fixedly connected together, wherein the main beam (1) is arranged on the top surface of the floor slab (6), one end of the main beam (1) extends out of the floor slab (6) to form a cantilever end, the short vertical rod (12) is located on the bottom surface of the cantilever end of the main beam (1), the short vertical rod (12) is used to abut against the side beam (9), and the oblique bracing rod (13) is located between the side of the short vertical rod (12) away from the side beam (9) and the bottom surface of the cantilever end of the main beam (1); A plurality of pre-buried anchoring mechanisms are arranged on the floor slab (6), and the pre-buried anchoring mechanisms are detachably connected to the main beam rod (1).

2. The unconventional cantilever scaffolding according to claim 1 is characterized in that: The embedded anchoring mechanism comprises: A U-shaped bolt anchor ring (3) is arranged on the floor slab (6), and the main beam rod (1) is located in the inner circle of the U-shaped bolt anchor ring (3); An angle steel (2) is arranged on the top surface of the main beam rod (1), and the angle steel (2) is detachably connected to the U-shaped bolt anchor ring (3) via a nut (4).

3. The unconventional cantilever scaffolding according to claim 2 is characterized in that: It also comprises a plurality of first steel bars (5) arranged in the floor slab (6), wherein the first steel bars (5) are used to fix the position of the U-shaped bolt anchor ring (3).

4. The unconventional cantilever scaffolding according to claim 2 is characterized in that: Wooden wedges (8) are arranged between the two sides of the main beam (1) and the U-shaped bolt anchor ring (3).

5. The unconventional cantilever scaffolding according to claim 1 is characterized in that: A wooden board (7) is arranged between the floor slab and the main beam.

6. The unconventional cantilever scaffolding according to claim 1 is characterized in that: A plurality of second steel bars (14) are arranged on the top surface of the cantilever end of the main beam (1), and the second steel bars (14) are used for installing the internal and external scaffolding steel pipes (10).

7. The unconventional cantilever scaffolding according to claim 1 is characterized in that: The main beam (1) is a steel section.

8. The unconventional cantilever scaffolding according to claim 1 is characterized in that: The short vertical rod (12) and the diagonal bracing rod (13) are channel steels.

9. The unconventional cantilever scaffolding according to claim 1, characterized in that: Specifically, there are three pre-embedded anchoring mechanisms, and the distance between two pre-embedded anchoring mechanisms far away from the cantilever end of the main beam (1) is 200 mm.

10. A method for erecting an unconventional cantilever scaffold, based on the unconventional cantilever scaffold according to any one of claims 1 to 9, characterized in that: The following steps are involved: Pre-embed a plurality of the pre-embedded anchoring mechanisms on the floor slab (6); The main beam (1) is erected on the floor slab (6) so that the short vertical rod (12) abuts against the side beam (9) and the embedded anchoring mechanism is connected to the main beam (1).

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