CN111321880A - Aerial cast-in-place structure that encorbelments greatly strides sky combination bearing steel platform - Google Patents
Aerial cast-in-place structure that encorbelments greatly strides sky combination bearing steel platform Download PDFInfo
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- CN111321880A CN111321880A CN202010256132.6A CN202010256132A CN111321880A CN 111321880 A CN111321880 A CN 111321880A CN 202010256132 A CN202010256132 A CN 202010256132A CN 111321880 A CN111321880 A CN 111321880A
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- shaped steel
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
Abstract
The invention discloses a high-altitude large-cantilever cast-in-place structure span combined bearing steel platform which comprises a plurality of rectangular steel trusses, wherein the rectangular steel trusses are arranged on a main body structure in a span mode, and connecting beams are arranged at the upper parts of the rectangular steel trusses; overhanging I-beams are arranged on two sides of a plurality of rectangular steel trusses, are arranged on a main structure in a spanning mode, are anchored on a main structure floor slab through I-beam compression rings at two ends, and are supported at the bottoms of the connecting beams through leveling pieces so as to be used for adjusting the height difference position between the connecting beams and the rectangular steel trusses; the rectangular steel truss and the lower part of the overhanging I-shaped steel are stably supported on a main structure wall or a floor slab through inclined struts. Compared with the prior art, the structural device has the advantages of simple construction method, flexible assembly, simple erection, high construction speed, economy, environmental protection, turnover use, low cost, large bearing capacity, safety and reliability.
Description
Technical Field
The invention relates to a high-altitude large-cantilever cast-in-place structure span combined bearing steel platform, and belongs to the technical field of building construction.
Background
Along with the rapid development of super high-rise buildings, the application of high-altitude large-cantilever structures is more and more, the traditional high-altitude large-cantilever concrete cast-in-place structural member mainly adopts a mode of a floor type full-hall scaffold supporting system or a mode of a common I-steel cantilever scaffold, but the floor type full-hall scaffold is very expensive due to large height and heavy load.
The invention patent (110043017A) of Shenyang building university application discloses an I-steel reinforcing beam overhanging type scaffold, which comprises an I-steel beam, a vertical steel pipe, a steel plate, a horizontal steel pipe, a nut, a concrete floor slab and a hollow plastic pipe; the I-shaped steel beam is arranged on the concrete floor slab, one end of the I-shaped steel beam is picked out, the picked-out end is a head, and the other end is a tail; a circular opening is formed in the web plate at the tail part of the I-shaped steel beam; the two steel plates are respectively placed on the upper surface of the tail part of the I-shaped steel beam and the lower surface of the concrete floor slab, two through holes are formed in the tail part of the concrete floor slab, and hollow plastic pipes are embedded in the inner sides of the through holes; the long edge direction of the steel plate is perpendicular to the long edge direction of the I-shaped steel beam, the projections of the two steel plates in the vertical direction correspond to each other, the length of the steel plate is larger than the width of the upper end face of the I-shaped steel beam, two circular through openings are formed in two ends of the steel plate, the diameters of the vertical steel pipes are consistent with the diameters of the openings, rotary threads are arranged at two ends of the vertical steel pipes, the two vertical steel pipes are respectively positioned at two sides of the tail of the I-shaped steel beam and cling to the I-shaped steel beam, the two vertical steel pipes respectively penetrate through the circular openings in the two ends of the steel plate and two through; key groove type node plugs are welded at two ends of the horizontal steel pipe, the key groove type node plugs are called to be convex inverted quadrangular frustum pyramid, the horizontal steel pipe penetrates through a circular opening of the I-shaped steel beam and is fixed on the I-shaped steel beam in a welding seam connection mode, key groove type node sockets are welded at the outer side of the middle portion of the vertical steel pipe, the key groove type node sockets are inverted quadrangular frustum pyramid grooves, and the key groove type node sockets are fixed with the key groove type node plugs correspondingly.
This kind of scheme simple to operate can recycle, has increased the stability and the security of connecting, has reduced simultaneously that pre-buried remains the restriction to the space function of using. However, no consideration has been given to: the mode of the I-steel cantilever scaffold is that the multi-layer plate is simultaneously cantilevered, the load is large, and under the working condition of long cantilever distance, the stress calculation is difficult to pass through, so that the I-steel cantilever scaffold is difficult to popularize in practical application.
Disclosure of Invention
The invention aims to provide a high-altitude large-cantilever cast-in-place structure span combined bearing steel platform to overcome the defects of the prior art.
The invention is realized by the following steps:
a high-altitude large-cantilever cast-in-place structure span combination bearing steel platform comprises a plurality of rectangular steel trusses, wherein the rectangular steel trusses are arranged on a main body structure in a span mode, and connecting beams are arranged at the upper portions of the rectangular steel trusses; overhanging I-beams are arranged on two sides of a plurality of rectangular steel trusses, are arranged on a main structure in a spanning mode, are anchored on a main structure floor slab through I-beam compression rings at two ends, and are supported at the bottoms of the connecting beams through leveling pieces so as to be used for adjusting the height difference position between the connecting beams and the rectangular steel trusses; the rectangular steel truss and the lower part of the overhanging I-shaped steel are stably supported on a main structure wall or a floor slab through inclined struts.
Furthermore, the rectangular steel truss is made of h-shaped steel sections and comprises upper and lower chord members, oblique web members, straight web members and hanging rings, a single rectangular steel truss is machined and formed in a factory, and all the members are connected by welding.
Further, the upper chord member and the lower chord member are two I-shaped steel beams which are arranged in parallel; the straight web members are positioned between the I-shaped steels at the two ends of the upper chord member and the lower chord member, and the inclined web members are positioned between the I-shaped steels at the middle parts of the upper chord member and the lower chord member to form a truss; the hanging ring is arranged on the top of the I-shaped steel above the upper chord and the lower chord, and two ends of the hanging ring are respectively provided with one.
Furthermore, the inclined strut is made of I-shaped steel, every two I-shaped steel beams are used as a group, the top end of the inclined strut is welded with the rectangular steel truss or a steel plate embedded part at the bottom of the overhanging I-shaped steel beam, and the bottom end of the inclined strut is welded with the structural embedded part in the main structure wall or the floor slab.
And further, a stability-increasing support is arranged between two adjacent inclined supports, the stability-increasing support is made of I-shaped steel, and the stability-increasing support is welded with the inclined supports.
Furthermore, the leveling piece is made of I-shaped steel section steel and is vertically welded to the upper flange of the cantilever I-shaped steel.
Furthermore, the connecting beam is made of I-shaped steel section steel, the connecting beam is welded and fixed with the rectangular steel truss, and the connecting beam is welded and fixed with the leveling piece.
Further, the I-steel compression ring is made of steel plates and round steel, and the I-steel compression ring is pre-embedded before main structure concrete pouring.
Further, the main body structure is a cast-in-place reinforced concrete structure.
Compared with the prior art, the invention has the beneficial effects that due to the adoption of the technical scheme: the construction method of the structural device is simple, the assembly and splicing are flexible, the erection is simple, the construction speed is high, the construction device is economic and environment-friendly, can be used in a turnover mode, and is low in cost, large in bearing capacity, safe and reliable.
Drawings
FIG. 1 is a schematic view of a single-span space-spanning rectangular steel truss;
FIG. 2 is a schematic layout view of a cross-space rectangular steel truss and diagonal braces;
FIG. 3 is a schematic view of a cross-space rectangular steel truss and a stability-increasing support;
FIG. 4 is a diagram illustrating an embodiment of the present invention.
Description of reference numerals: the method comprises the following steps of 1-rectangular steel truss, 2-overhanging I-steel, 3-diagonal brace, 4-stability-increasing brace, 5-leveling piece, 6-connecting beam, 7-I-steel compression ring, 8-main structure, 9-upper and lower chord members, 10-diagonal web member, 11-straight web member, 12-lifting ring, 13-structure embedded part and 14-steel plate embedded part.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The implementation structure of the combined bearing platform with the high-altitude large-cantilever cast-in-place structure is shown in figure 4 and mainly comprises a rectangular steel truss 1, cantilever I-shaped steel 2, an inclined strut 3, a stability-increasing strut 4, a leveling piece 5, a connecting beam 6, an I-shaped steel compression ring 7, a main structure 8 and the like.
As shown in figure 1, the cross-hollow rectangular steel truss 1 adopts 12m long monolithic 22A I-steel as an upper chord member and a lower chord member 9, adopts 18# I-steel as an inclined web member 10 and a straight web member 11, adopts 4mm steel plates to process and form a hanging ring 12, and adopts welded connection among all components of the rectangular steel truss 1, wherein the thickness of a welding seam is more than or equal to 0.7t (plate thickness).
As shown in fig. 2, a steel plate embedded part 14 is embedded in the installation position of the cross-over 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; the bottom of the lower chord of the rectangular steel truss 1 is provided with the inclined strut 3, the rectangular steel truss 1 is connected with the inclined strut 3 in a welding mode, the inclined strut 3 is connected with the structural embedded part 13 of the main structure 8 in a welding mode, and the structural embedded part 13 needs to be embedded before concrete is poured into the main structure 8.
As shown in figure 3, stability-enhancing supports 4 are arranged between the inclined supports 3 of the cross-over rectangular steel truss 1 and between the inclined supports 3 of the overhanging I-shaped steel 2, and the single steel truss and the I-shaped steel are connected into a whole to form a bearing platform.
As shown in fig. 4, a connecting beam 6 is arranged on a rectangular steel truss 1, the connecting beam 6 is made of 18# I-steel, the height difference position between the overhanging I-steel 2 and the upper chord of the rectangular steel truss 1 is leveled by a leveling piece 5, the overhanging I-steel 2 and the connecting beam 6 are welded and fixed, and a steel bar mounting formwork supporting frame and an outer scaffold vertical rod are welded and positioned at the top of the I-steel.
Of course, the above is only a specific application example of the present invention, and other embodiments of the present invention are also within the scope of the present invention.
Claims (9)
1. The utility model provides a cast-in-place structure sky combination bearing steel platform that encorbelments greatly in high altitude which characterized in that: the steel truss structure comprises a plurality of rectangular steel trusses (1), wherein the rectangular steel trusses (1) are arranged on a main structure (8) in a spanning mode, and connecting beams (6) are arranged at the upper parts of the rectangular steel trusses (1); overhanging I-beams (2) are arranged on two sides of a plurality of rectangular steel trusses (1), the overhanging I-beams (2) are arranged on a main structure (8) in a spanning mode, two ends of the overhanging I-beams are anchored on a floor slab of the main structure (8) through I-beam compression rings (7), and the overhanging I-beams (2) are supported at the bottoms of connecting beams (6) through leveling pieces (5) and used for adjusting the height difference position between the overhanging I-beams and the rectangular steel trusses (1); the lower parts of the rectangular steel truss (1) and the overhanging I-shaped steel (2) are stably supported on a wall body or a floor slab of a main structure (8) through inclined struts (3).
2. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 1, which is characterized in that: the rectangular steel truss (1) is formed by I-shaped steel sections and comprises an upper chord member, a lower chord member (9), an inclined web member (10), a straight web member (11) and a lifting ring (12), wherein a single rectangular steel truss (1) is processed and formed in a factory, and all the members are connected in a welding mode.
3. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 2, characterized in that: the upper chord member and the lower chord member (9) are two I-shaped steel beams which are arranged in parallel; the straight web members (11) are positioned between the I-shaped steels at the two ends of the upper chord member (9) and the lower chord member (9), and the inclined web members (10) are positioned between the I-shaped steels in the middle of the upper chord member (9) and the lower chord member (9) to form a truss; the hanging ring (12) is arranged at the top of the I-shaped steel above the upper and lower chords (9), and two ends of the hanging ring are respectively provided with one.
4. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 2, characterized in that: the inclined strut (3) is made of I-shaped steel, every two I-shaped steel serve as a group, the top end of the inclined strut (3) is welded with a steel plate embedded part (14) at the bottom of the rectangular steel truss (1) or the overhanging I-shaped steel (2), and the bottom end of the inclined strut (3) is welded with a structural embedded part (13) in a wall body or a floor slab of the main structure (8).
5. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 4, characterized in that: and a stability-increasing support (4) is arranged between two adjacent inclined supports (3), the stability-increasing support (4) is made of I-shaped steel, and the stability-increasing support (4) is welded with the inclined supports (3).
6. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 1, which is characterized in that: the leveling piece (5) is made of I-shaped steel section steel and is vertically welded to the upper flange of the overhanging I-shaped steel (2).
7. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 1, which is characterized in that: the connecting beam (6) is made of I-shaped steel section steel, the connecting beam (6) is fixedly welded with the rectangular steel truss (1), and the connecting beam (6) is fixedly welded with the leveling piece (5).
8. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to claim 1, which is characterized in that: the I-shaped steel compression ring (7) is made of steel plates and round steel, and the I-shaped steel compression ring (7) is pre-embedded before concrete pouring of the main structure (8).
9. The aerial large-cantilever cast-in-place structure span combination bearing steel platform according to any one of claims 1 to 8, characterized in that: the main body structure (8) is a cast-in-place reinforced concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010256132.6A CN111321880A (en) | 2020-04-02 | 2020-04-02 | Aerial cast-in-place structure that encorbelments greatly strides sky combination bearing steel platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010256132.6A CN111321880A (en) | 2020-04-02 | 2020-04-02 | Aerial cast-in-place structure that encorbelments greatly strides sky combination bearing steel platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111321880A true CN111321880A (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010256132.6A Pending CN111321880A (en) | 2020-04-02 | 2020-04-02 | Aerial cast-in-place structure that encorbelments greatly strides sky combination bearing steel platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111321880A (en) |
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2020
- 2020-04-02 CN CN202010256132.6A patent/CN111321880A/en active Pending
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