CN111424948A - Construction method and construction platform for cantilever structure layer of high-rise building - Google Patents

Abstract

The invention discloses a construction method and a construction platform for an overhanging structural layer of a high-rise building, wherein a connecting steel plate for fixing an overlong overhanging I-shaped steel formwork system is pre-embedded during the construction of a lower two-layer main structure of the overhanging structural layer; then manufacturing an overlong overhanging I-steel formwork system by adopting I-steel; after concrete of the lower two layers of main structures of the overhanging structural layer is poured and fully solidified, fixedly connecting the overlong overhanging I-shaped steel formwork system with the pre-buried connecting steel plate; laying a template on the top surface of the overlong overhanging I-shaped steel formwork system and fixedly connecting the template with the overlong overhanging I-shaped steel formwork system; and erecting a scaffold on the top surface of the template to serve as a construction platform of the cantilever structure layer. The construction method changes the construction mode that the scaffold needs to be erected from the ground in the prior art, and avoids the influence on garden and small-city construction in a field before the floor type full scaffold is dismantled; and a large amount of steel pipes required for supporting the scaffold are saved, and the method has the characteristics of high construction speed and low construction difficulty.

Description

A construction method and construction platform for a high-rise building cantilevered structural layer

technical field

The invention relates to a construction method and a construction platform for a cantilevered structure layer of a high-rise building, belonging to the technical field of construction engineering.

Background technique

With the rapid development of the construction industry, in order to meet the requirements of the facade effect in some projects, high-rise buildings cantilevered concrete structures, especially cantilevered curtain wall structures abound. If the full-house scaffolding method of the prior art is used for construction, there is a long period of time, great construction difficulty, and no turnover, requiring a larger construction site and more manpower, and has a greater impact on the construction period of subsequent garden municipal projects. Therefore, there are still deficiencies in the prior art, and further improvement is required.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a construction method and a construction platform for the cantilevered structure layer of a high-rise building, so as to solve the problems of long period, high construction difficulty, and the need to occupy a large construction site and a large number of existing scaffolding construction methods. At the same time, it solves the problem that has a greater impact on the construction period of the subsequent garden municipal engineering, thereby overcoming the shortcomings of the existing technology.

To achieve the above object, the present invention adopts the following technical solutions:

The present invention relates to a construction method for a cantilevered structure layer of a high-rise building, which comprises pre-embedding connecting steel plates for fixing a super-long cantilevered I-beam support formwork system during construction of the main structures of the lower two layers of the cantilevered structural layer; Then the I-beam is used to make the super-long cantilever I-beam formwork system; after the concrete of the main structure of the lower two layers of the cantilevered structural layer is poured and fully consolidated, the super-long cantilever I-beam formwork system and the The pre-embedded connecting steel plate is fixedly connected; then the formwork is laid on the top surface of the super-long cantilever I-beam formwork system and fixedly connected with the super-long cantilever I-beam formwork system; scaffolding is set up on the top surface of the formwork as a cantilevered structure layer The construction platform is used to construct the cantilevered structure layer of the high-rise building through the construction platform.

A construction platform for a high-rise building cantilevered structure layer of the present invention formed according to the above method comprises lower two-layer main structures arranged below the cantilevered structure layer of the high-rise building, and connecting steel plates are pre-embedded on the lower two-layer main structures, A super-long cantilever I-beam formwork system is fixedly connected to the connecting steel plate; a formwork is laid on the top surface of the super-long cantilever I-beam formwork system, and a construction as a cantilever structure layer is erected on the top surface of the formwork. Scaffolding for platforms.

In the construction platform of the above-mentioned high-rise building cantilevered structure layer, the super-long cantilever I-beam formwork system includes a set of super-long cantilever I-beams; the super-long cantilever I-beams are welded by a set of transverse I-beams A grid-like support plane is formed; a group of vertical columns are vertically welded in the middle of the super-long cantilever I-beam, and a set of diagonal braced I-beams are arranged between the lower end of the column and the super-long cantilever I-beam and the horizontal I-beam; the upper and lower columns are Both ends are connected by a set of transverse connecting beams.

In the above-mentioned construction platform of the cantilevered structure layer of the high-rise building, the group of super-long cantilever I-beams and a group of transverse I-beams both include a main I-beam with a larger cross-sectional size and an auxiliary I-beam with a smaller cross-sectional size. Steel; the column and diagonal brace I-beam are welded with the main I-beam.

In the above-mentioned construction platform of the cantilevered structure layer of the high-rise building, a group of high-strength bolts are arranged on the connecting steel plate, and a group of high-strength bolts pass through the connecting holes on the column and the diagonal bracing I-beam and the super-long cantilever I-beam support formwork system. Fixed connection.

In the above-mentioned construction platform of the cantilevered structure layer of the high-rise building, the scaffold is erected with steel pipes and pipe buckles; the lower end of the riser of the scaffold stands on the top surface of the formwork corresponding to the intersection of the super-long cantilever I-beam and the horizontal I-beam; the scaffold is supported by The wall rod is fixedly connected with the wall of the main body of the building.

Due to the adoption of the above technical solution, compared with the prior art, the present invention adopts the super-long cantilever I-beam formwork system as the basic platform of the scaffold, and supports the super-long cantilever I-beam formwork system on the top surface of the scaffold. Set up scaffolding; change the existing construction method of scaffolding from the ground, avoid the impact on the garden and small municipal construction in the site before the demolition of the floor-standing full-house scaffolding; and save a lot of steel pipes required for scaffolding, with The construction speed is fast and the construction difficulty is small.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the structural representation of the super-long cantilever I-beam formwork system of the present invention;

Fig. 3 is the front view of Fig. 2;

FIG. 4 is a right side view of FIG. 3 .

The marks in the figure are as follows: 1- cantilevered structure layer, 2- main structure of the lower two layers, 3- super-long cantilever I-beam formwork system, 4- connecting steel plate, 5- template, 6- scaffolding, 7- super long Cantilever I-beam, 8-horizontal I-beam, 9-column, 10-diagonal I-beam, 11-horizontal connecting beam, 12-high-strength bolt, 13-standpipe, 14-wall.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

A construction method of the cantilevered structure layer of a high-rise building of the present invention, as shown in FIG. 1 , the method is to pre-embed the main structure 2 of the lower two layers of the cantilevered structural layer 1 for fixing the super-long cantilever I-shaped during construction. The connecting steel plate 4 of the steel formwork system 3; then the I-beam is used to make the super-long cantilever I-beam formwork system 3; after the concrete of the main structure 2 of the lower two layers of the cantilever structure layer 1 is poured and fully consolidated , the super-long cantilever I-beam formwork system 3 is fixedly connected with the embedded connecting steel plate 4; The formwork system 3 is fixedly connected; scaffolding 6 is erected on the top surface of the formwork 5 as a construction platform for the cantilevered structural layer 1, through which the cantilevered structural layer of the high-rise building is constructed.

A construction platform for a high-rise building cantilevered structure layer of the present invention constructed according to the above method, as shown in FIGS. 1 to 4 , the construction platform includes a lower two-layer main structure arranged below the cantilevered structure layer 1 of the high-rise building 2. A connecting steel plate 4 is pre-embedded on the lower two-layer main structure 2, and an ultra-long cantilever I-beam formwork system 3 is fixedly connected to the connecting steel plate 4; A formwork 5 is laid on the surface, and a scaffold 6 is set up on the top surface of the formwork 5 as the construction platform of the overhanging structure layer 1; Including a group of super-long cantilever I-beam 7; the super-long cantilever I-beam 7 is welded by a group of transverse I-beam 8 to form a grid-like support plane; the middle of the super-long cantilever I-beam 7 is vertically welded with a group of columns 9. A set of diagonal brace I-beams 10 are arranged between the lower end of the column 9 and the super-long cantilever I-beam 7 and the transverse I-beam 8; the upper and lower ends of the column 9 are connected by a set of transverse connecting beams 11. A group of super-long cantilever I-beams 7 and a group of transverse I-beams 8 all include a main I-beam with a larger cross-sectional size and an auxiliary I-beam with a smaller cross-sectional size; the column 9 and the diagonal brace I-beam 10 Welded with the main I-beam. A group of high-strength bolts 12 are arranged on the connecting steel plate 4, and a group of high-strength bolts 12 are fixedly connected to the super-long cantilever I-beam support system 3 through the connecting holes on the column 9 and the diagonal brace I-beam 10. The scaffold 6 is erected with steel pipes and pipe buckles; the lower end of the riser 13 of the scaffold 6 stands on the top surface of the formwork corresponding to the intersection of the super-long cantilever I-beam 7 and the horizontal I-beam 8; The wall 14 is fixedly connected.

In concrete implementation, the present invention is a basic platform structure formed by combining an ultra-long cantilever I-beam formwork system with a scaffold in the prior art. The length of the super-long cantilevered I-beam in the cantilevered I-beam formwork system is 6.5m, and the 9m-long super-long cantilevered I-beam is used at the local corner position. The cantilevered structural layer support system is set up with the super-long cantilever I-beam formwork system. After the construction of the cantilevered structural layer is completed, the cantilevered structural layer support system is used as the scaffolding for the construction of the cantilevered curtain wall.

The invention adopts the super-long cantilever I-beam formwork system as the basic platform of the scaffold, and supports the scaffold on the top surface of the super-long cantilever I-beam formwork system; The construction method avoids the impact of the floor-standing full-house scaffolding on the garden and small municipal construction in the site before the demolition; and saves a lot of steel pipes required for supporting the scaffolding, which has the characteristics of fast construction speed and low construction difficulty.

Claims (7)

1. A construction method of a cantilever structure layer of a high-rise building is characterized by comprising the following steps: the method comprises the steps that a connecting steel plate for fixing an overlong overhanging I-shaped steel formwork system is pre-buried when a lower two-layer main structure of an overhanging structural layer is constructed; then manufacturing an overlong overhanging I-steel formwork system by adopting I-steel; after concrete of the lower two layers of main structures of the overhanging structural layer is poured and fully solidified, fixedly connecting the overlong overhanging I-shaped steel formwork system with the pre-buried connecting steel plate; then, laying a template on the top surface of the overlong overhanging I-shaped steel formwork system and fixedly connecting the template with the overlong overhanging I-shaped steel formwork system; and erecting a scaffold on the top surface of the template to serve as a construction platform of the cantilever structure layer, and constructing the cantilever structure layer of the high-rise building through the construction platform.

2. A construction platform of a high-rise building overhanging structural layer formed according to the method of claim 1, comprising a lower two-layer main structure (2) arranged below the overhanging structural layer (1) of the high-rise building, characterized in that: connecting steel plates (4) are embedded in the lower two layers of main structures (2), and an ultra-long overhanging I-shaped steel formwork system (3) is fixedly connected to the connecting steel plates (4); the top surface of the overlong overhanging I-shaped steel formwork system (3) is paved with a formwork (5), and a scaffold (6) used as a construction platform of the overhanging structural layer (1) is erected on the top surface of the formwork (5).

3. The construction platform of the cantilever structure layer of the high-rise building according to claim 2, wherein: the overlong overhanging I-shaped steel formwork system (3) comprises a group of overlong overhanging I-shaped steels (7); the overlong overhanging I-shaped steel (7) is welded by a group of transverse I-shaped steel (8) to form a latticed supporting plane; a group of upright posts (9) are vertically welded in the middle of the overlong overhanging I-shaped steel (7), and a group of inclined strut I-shaped steel (10) is arranged between the lower ends of the upright posts (9) and the overlong overhanging I-shaped steel (7) and the transverse I-shaped steel (8); the upper end and the lower end of the upright post (9) are connected through a group of transverse connecting beams (11).

4. The construction platform of the cantilever structure layer of the high-rise building according to claim 3, wherein: the overlong overhanging I-shaped steel (7) and the transverse I-shaped steel (8) comprise main I-shaped steel with larger section size and auxiliary I-shaped steel with smaller section size; the upright post (9) and the diagonal bracing I-steel (10) are respectively welded with main I-steel of the overlong overhanging I-steel (7) or the transverse I-steel (8).

5. The construction platform of the cantilever structure layer of the high-rise building according to claim 3, wherein: a group of high-strength bolts (12) are arranged on the connecting steel plate (4), and the group of high-strength bolts (12) penetrate through connecting holes in the upright posts (9) and the diagonal bracing I-steel (10) to fixedly connect the overlong cantilever I-steel formwork system (3) with the connecting steel plate (4).

6. The construction platform of the cantilever structure layer of the high-rise building according to claim 3, wherein: a group of high-strength bolts (12) are arranged on the connecting steel plate (4), and the group of high-strength bolts (12) penetrate through connecting holes in the upright posts (9) and the diagonal bracing I-steel (10) to fixedly connect the overlong cantilever I-steel formwork system (3) with the connecting steel plate (4).

7. The construction platform of the cantilever structure layer of the high-rise building according to claim 3, wherein: the scaffold (6) is formed by connecting a steel pipe and a pipe buckle; the lower end of a vertical pipe (13) of the scaffold (6) is erected on the top surface of a template corresponding to the intersection of the overlong overhanging I-shaped steel (7) and the transverse I-shaped steel (8); the scaffold (6) is fixedly connected with a wall body (14) of the building main body through a wall supporting rod.

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