A high-altitude large cantilever cast-in-place structure spanning space combined load-bearing steel platform

Abstract

The present invention discloses a high-altitude large cantilever cast-in-place structure span-space composite load-bearing steel platform, including multiple rectangular steel trusses, the rectangular steel trusses are span-spaced on the main structure, and a connecting beam is arranged on the upper part of the rectangular steel trusses; cantilevered I-beams are arranged on both sides of the multiple rectangular steel trusses, the cantilevered I-beams are span-spaced on the main structure and the two ends are anchored on the main structure floor through I-beam pressure rings, the cantilevered I-beams are supported at the bottom of the connecting beam through leveling pieces to adjust the height difference position with the rectangular steel trusses; the rectangular steel trusses and the cantilevered I-beams are firmly supported on the main structure wall or floor through diagonal braces. Due to the adoption of the above technical scheme, compared with the prior art, the structural device of the present invention has a simple construction method, flexible assembly, simple erection, fast construction speed, economic and environmental protection, turnover, low cost, large bearing capacity, and safety and reliability.

Description

Technical Field

[0001] The invention relates to a high-altitude large cantilever cast-in-place structure spanning space combined load-bearing steel platform, belonging to the technical field of building construction. Background Art

[0002] With the rapid development of super high-rise buildings, the application of high-altitude large cantilever structures is becoming more and more common. In the past, high-altitude large cantilever cast-in-place concrete structural components mainly adopted the method of ground-type full-height scaffolding support system or ordinary I-beam cantilever scaffolding. However, due to the large height and heavy load, the ground-type full-height scaffolding will cost a lot.

[0003] The invention patent (110043017A) applied for by Shenyang Jianzhu University discloses an I-beam reinforced beam cantilever scaffolding, including an I-beam, a vertical steel pipe, a steel plate, a horizontal steel pipe, a nut, a concrete floor, and a hollow plastic pipe; the I-beam is arranged on the concrete floor, one end of the I-beam is extended, the extended end is the head, and the other end is the tail; there is a circular opening on the web of the tail of the I-beam; two steel plates are respectively placed above the tail of the I-beam and below the concrete floor, and the tail of the concrete floor is provided with two through holes, and hollow plastic pipes are pre-buried inside the through holes; the long side direction of the steel plate is perpendicular to the long side direction of the I-beam, the vertical projections of the two steel plates correspond, the length of the steel plate is greater than the width of the upper end face of the I-beam, and there are two circular through openings at both ends of the steel plate. Mouth, the diameter of the vertical steel pipe is consistent with the opening diameter, and both ends of the vertical steel pipe are provided with rotating threads. The two vertical steel pipes are respectively located on both sides of the tail of the I-beam and are close to the I-beam. The two vertical steel pipes pass through the circular openings at both ends of the steel plate and the two through holes at the tail of the concrete floor slab respectively. The four nuts have rotating threads inside, and are respectively sleeved on the upper and lower ends of the two vertical steel pipes for fixing; keyway node plugs are welded at both ends of the horizontal steel pipe, and the keyway node plugs are called protruding inverted tetrahedrons. The horizontal steel pipe passes through the circular opening of the I-beam and is fixed on the I-beam by means of weld connection. A keyway node socket is welded on the outer side of the middle part of the vertical steel pipe, and the keyway node socket is an inverted tetrahedron groove, and the keyway node socket is fixed corresponding to the keyway node plug.

[0004] This type of solution is easy to install and can be used repeatedly, which increases the stability and safety of the connection and reduces the restrictions on the use of space by the embedded residue. However, it has not been considered that the force calculation of this type of I-beam cantilever scaffolding is difficult to pass under the conditions of cantilevering multiple layers of boards at the same time, large loads, and long cantilever distances, and it is difficult to promote it in practical applications. Summary of the invention

[0005] The purpose of the present invention is to provide a high-altitude large cantilever cast-in-place structure spanning space combined load-bearing steel platform to overcome the shortcomings of the prior art.

[0006] The present invention is achieved in that:

[0007] A high-altitude large cantilever cast-in-place structure span-and-air combined load-bearing steel platform comprises a plurality of rectangular steel trusses, which are span-and-air arranged on a main structure, and a connecting beam is arranged on the upper part of the rectangular steel trusses; cantilevered I-beams are arranged on both sides of the plurality of rectangular steel trusses, which are span-and-air arranged on the main structure and have their two ends anchored to the main structure floor slab by I-beam compression rings, and the cantilevered I-beam is supported at the bottom of the connecting beam by a leveling piece to adjust the height difference with the rectangular steel truss; the rectangular steel truss and the cantilevered I-beam are both firmly supported on the main structure wall or floor slab by diagonal braces.

[0008] Furthermore, the aforementioned rectangular steel truss is composed of I-beam steel, including upper and lower chords, diagonal webs, straight webs and lifting rings. The single rectangular steel truss is processed and formed in the factory, and each member is connected by welding.

[0009] Furthermore, the aforementioned upper and lower chords are two upper and lower I-beams arranged in parallel; the aforementioned straight web members are located between the I-beams at both ends of the upper and lower chords, and the aforementioned diagonal web members are located between the I-beams in the middle of the upper and lower chords to form a truss; the aforementioned lifting rings are arranged on the top of the I-beams above the upper and lower chords, with one at each end.

[0010] Furthermore, the aforementioned diagonal braces are made of I-beams, with every two as a group. The top ends of the aforementioned diagonal braces are welded to the steel plate embedded parts at the bottom of the aforementioned rectangular steel trusses or cantilevered I-beams, and the bottom ends of the aforementioned diagonal braces are welded to the structural embedded parts in the aforementioned main structure walls or floor slabs.

[0011] Furthermore, a stabilizing support is provided between two adjacent diagonal supports. The aforementioned stabilizing support is made of I-beams, and the stabilizing support is welded to the diagonal support.

[0012] Furthermore, the aforementioned leveling member is made of I-beam steel and vertically welded to the upper flange of the cantilevered I-beam.

[0013] Furthermore, the aforementioned connecting beam is made of I-beam steel, the connecting beam is fixed to the rectangular steel truss by welding, and the connecting beam is fixed to the leveling piece by welding.

[0014] Furthermore, the aforementioned I-beam compression ring is made of steel plate and round steel, and the I-beam compression ring is embedded before the concrete of the main structure is poured.

[0015] Furthermore, the aforementioned main structure is a cast-in-place reinforced concrete structure.

[0016] Due to the adoption of the above technical scheme, compared with the prior art, the beneficial effects of the present invention are as follows: the structural device has a simple construction method, flexible assembly, simple erection, fast construction speed, economy and environmental protection, can be used in a turnover manner, has low cost, large bearing capacity, and is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a single span rectangular steel truss;

[0018] Figure 2 This is a schematic diagram of the arrangement of spanning rectangular steel trusses and diagonal braces;

[0019] Figure 3 This is a schematic diagram of the spanning rectangular steel truss and the stabilizing brace;

[0020] Figure 4 This is an implementation diagram of the present invention.

[0021] Explanation of the reference numerals in the accompanying drawings: 1-rectangular steel truss, 2-cantilevered I-beam, 3-diagonal brace, 4-stabilizing brace, 5-leveling piece, 6-connecting beam, 7-I-beam compression ring, 8-main structure, 9-upper and lower chords, 10-diagonal web member, 11-straight web member, 12-lifting ring, 13-structure embedded parts, 14-steel plate embedded parts. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0023] The implementation structure of the high altitude large cantilever cast-in-place structure combined load-bearing platform adopted by the present invention is as follows Figure 4 As shown, it is mainly composed of a rectangular steel truss 1, a cantilevered I-beam 2, a diagonal brace 3, a stabilizing brace 4, a leveling piece 5, a connecting beam 6, an I-beam pressure ring 7 and a main structure 8.

[0024] like Figure 1 As shown, the spanning rectangular steel truss 1 uses 12m long 22A I-steel as the upper and lower chords 9, uses 18# I-steel as the diagonal web members 10 and the straight web members 11, and uses 4mm steel plates to form the lifting rings 12. The components of the rectangular steel truss 1 are connected by welding, and the weld thickness is ≥0.7t (plate thickness).

[0025] like Figure 2 As shown, a steel plate embedded part 14 is embedded at the installation position of the spanning rectangular steel truss 1, and the rectangular steel truss 1 and the steel plate embedded part 14 are temporarily welded and fixed when the rectangular steel truss 1 is installed; a diagonal brace 3 is arranged at the bottom of the lower chord of the rectangular steel truss 1, and the rectangular steel truss 1 and the diagonal brace 3 are welded and connected, and the diagonal brace 3 and the structural embedded part 13 of the main structure 8 are welded and connected, and the structural embedded part 13 needs to be embedded before the main structure 8 is poured with concrete.

[0026] like Figure 3 As shown, stabilizing braces 4 are arranged between the diagonal braces 3 of the spanning rectangular steel truss 1 and between the diagonal braces 3 of the cantilevered I-beam 2, so as to connect the single steel truss and the I-beam into a whole and form a load-bearing platform.

[0027] like Figure 4As shown, a connecting beam 6 is arranged on the rectangular steel truss 1, and the connecting beam 6 is made of 18# I-beam. The height difference between the cantilevered I-beam 2 and the upper chord of the rectangular steel truss 1 is leveled by a leveling piece 5. The leveling piece 5 is welded and fixed to the cantilevered I-beam 2 and the connecting beam 6, and a positioning steel bar is welded on the top of the I-beam to install the formwork support frame and the external scaffolding upright.

[0028] Of course, the above are only specific application examples of the present invention. The present invention has other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims

1. A high-altitude large cantilever cast-in-place structure spanning combined load-bearing steel platform, characterized by: The invention comprises a plurality of rectangular steel trusses (1), wherein the rectangular steel trusses (1) are arranged in a span on a main structure (8), and a connecting beam (6) is arranged on the upper part of the rectangular steel trusses (1); cantilevered I-beams (2) are arranged on both sides of the plurality of rectangular steel trusses (1), wherein the cantilevered I-beams (2) are arranged in a span on the main structure (8) and both ends are anchored to the floor slab of the main structure (8) through I-beam pressure rings (7), and the cantilevered I-beams (2) are supported on the bottom of the connecting beam (6) through leveling members (5) for adjusting the cantilevered I-beams (2) with the rectangular steel trusses (1). ) at a height difference position; the rectangular steel truss (1) and the cantilevered I-beam (2) are both firmly supported on the wall or floor of the main structure (8) through diagonal braces (3); the rectangular steel truss (1) is composed of I-beam steel, including upper and lower chords (9), diagonal webs (10), straight webs (11) and hanging rings (12); the single rectangular steel truss (1) is processed and formed in the factory, and each rod is connected by welding; the leveling member (5) is made of I-beam steel and is vertically welded to the upper flange of the cantilevered I-beam (2).

2. The high altitude large cantilever cast-in-place structure spanning combined load-bearing steel platform according to claim 1 is characterized by: The upper and lower chords (9) are two I-beams arranged in parallel above and below; the straight web members (11) are located between the I-beams at both ends of the upper and lower chords (9); the diagonal web members (10) are located between the I-beams in the middle of the upper and lower chords (9) to form a truss; the lifting rings (12) are arranged at the top of the I-beams above the upper and lower chords (9), with one at each end.

3. The high-altitude large cantilever cast-in-place structure spanning combined load-bearing steel platform according to claim 1 is characterized by: The diagonal braces (3) are made of I-beams, with two of them forming a group. The top ends of the diagonal braces (3) are welded to the steel plate embedded parts (14) at the bottom of the rectangular steel trusses (1) or the cantilevered I-beams (2), and the bottom ends of the diagonal braces (3) are welded to the structural embedded parts (13) in the wall or floor of the main structure (8).

4. The high-altitude large cantilever cast-in-place structure spanning combined load-bearing steel platform according to claim 3 is characterized by: A stabilizing support (4) is provided between two adjacent diagonal supports (3); the stabilizing support (4) is made of I-beams, and the stabilizing support (4) is welded to the diagonal supports (3).

5. The high-altitude large cantilever cast-in-place structure spanning space combined load-bearing steel platform according to claim 1 is characterized by: The connecting beam (6) is made of I-shaped steel, the connecting beam (6) is fixed to the rectangular steel truss (1) by welding, and the connecting beam (6) is fixed to the leveling member (5) by welding.

6. The high altitude large cantilever cast-in-place structure spanning space combined load-bearing steel platform according to claim 1 is characterized by: The I-beam pressure ring (7) is made of steel plates and round steel, and the I-beam pressure ring (7) is embedded before the concrete of the main structure (8) is poured.

7. The high-altitude large cantilever cast-in-place structure spanning combined load-bearing steel platform according to any one of claims 1 to 6, characterized in that: The main structure (8) is a cast-in-place reinforced concrete structure.

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