Rapid formwork-erecting-free construction method for newly-built sandwich structure of existing multi-storey plant

Abstract

The invention relates to a quick formwork-erecting-free construction method for a newly-built sandwich structure of an existing multi-storey plant, which comprises the following steps of: mounting a support beam on an existing frame column of the existing multi-storey plant corresponding to the position of the newly-built sandwich structure to be constructed; a plurality of connecting beams are vertically connected between every two adjacent supporting beams; a steel plate is laid on the supporting beam, and the periphery of the steel plate is folded upwards to serve as a side mold of concrete to be poured; a reinforcing mesh is laid on the steel plate; and concrete is poured on the steel plate to form a newly-built sandwich structure. According to the construction method, large machines are not needed in the construction process, the influence on production and operation of an existing plant is low, much labor input is saved, the procedures of steel bar binding and formwork dismantling in traditional engineering concrete structure construction are omitted, the construction production progress under the condition that the space of a reconstruction project is limited is greatly improved, meanwhile, design is ingenious, and the construction cost is low. The structure is simple, economical and reasonable.

Description

Technical Field

[0001] The invention relates to the field of construction engineering for factory building reconstruction, and in particular to a method for quickly constructing a new sandwich structure of an existing multi-story factory building without formwork support. Background Art

[0002] In the context of urban renewal, the renovation of industrial plants is very necessary and is also an especially important part of urban renewal.

[0003] At present, in the process of urban development, due to changes in economic and industrial structure, many old factories have gradually lost their original functions. In order to better utilize resources, protect the environment and promote urban development, factory reconstruction has become an inevitable trend.

[0004] Factory reconstruction can effectively utilize existing human, material and financial resources. By reconstructing old factory buildings, the cost of new buildings can be reduced, the waste of natural resources can be reduced, and sustainable utilization of resources can be achieved.

[0005] However, since the structure of most industrial plants is mainly a large-span frame structure with a high floor height, during the renovation process, new mezzanines are often built on the floors with large floor heights to increase the usable area to meet the post-renovation use function. Directly using a larger-sized concrete structure to build a new mezzanine in the renovation of an existing multi-story frame structure plant cannot meet the clearance requirements of the usable floor height. At the same time, if a concrete structure is used, it is necessary to set up a full-floor support scaffolding, support formwork, tie steel bars, pour concrete, and maintain it. After the mezzanine of the steel structure system is put into use later, the movement of equipment during production operations is very likely to generate noise, causing discomfort to users. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the prior art and provide a method for quickly constructing a new mezzanine structure in an existing multi-story factory building without formwork, so as to solve the problem that the existing direct use of larger-sized concrete structures cannot meet the requirements of floor height clearance and the problem of noise generated by the movement of production equipment on the mezzanine of the steel structure system.

[0007] The technical solution to achieve the above purpose is:

[0008] The present invention provides a method for quickly constructing a new sandwich structure of an existing multi-story factory building without formwork, comprising the following steps:

[0009] Corresponding to the location of the new mezzanine structure to be constructed, support beams are installed on the existing frame columns of the existing multi-storey factory building;

[0010] A plurality of coupling beams are vertically connected between two adjacent supporting beams;

[0011] Laying a steel plate on the support beam, and folding the periphery of the steel plate upwards to serve as a side form for concrete to be poured;

[0012] Laying a steel mesh on the steel plate;

[0013] Concrete is poured onto the steel plate to form a new sandwich structure.

[0014] A further improvement of the method for quickly constructing a new sandwich structure of an existing multi-storey factory building without formwork in the present invention is that, when installing the support beam, an embedded plate is arranged on the existing frame column;

[0015] A connecting plate vertically connected to the embedded plate is arranged on the embedded plate;

[0016] The end of the support beam is pressed against the embedded plate, and the side of the support beam is pressed against the connecting plate, and then fixedly connected by bolts.

[0017] A further improvement of the method for constructing a new sandwich structure of an existing multi-storey factory building without formwork is that it further comprises arranging a positioning plate below the connecting plate on the embedded plate;

[0018] When setting the support beam, the end of the support beam is placed on the positioning plate for positioning;

[0019] After the support beam is connected to the connection plate, the support beam is welded to the positioning plate.

[0020] The invention provides a further improvement on the method for quickly constructing a new sandwich structure of an existing multi-storey factory building without formwork, and further comprises: arranging a plurality of shear transmitters on the steel plate, wherein the shear transmitters are arranged vertically.

[0021] A further improvement of the method for quickly constructing a sandwich structure of an existing multi-story factory building without formwork is that the laid steel mesh is a bidirectional steel mesh.

[0022] A further improvement of the method for quickly constructing a sandwich structure of an existing multi-story factory building without formwork is that when laying steel plates, the laid steel plates are welded and fixed to corresponding connecting beams.

[0023] A further improvement of the method for quickly constructing a new sandwich structure of an existing multi-story factory building without formwork in the present invention is that the top of the connecting beam is arranged flush with the top of the supporting beam.

[0024] A further improvement of the method for quickly constructing a sandwich structure of an existing multi-story factory building without formwork is that the poured concrete is fine stone concrete.

[0025] A further improvement of the method for quickly constructing a new sandwich structure of an existing multi-story factory building without formwork is that the installed support beams are supported and connected to relatively existing frame columns.

[0026] A further improvement of the method for rapidly constructing a new sandwich structure of an existing multi-story factory building without formwork is that the height of the side formwork formed by folding is consistent with the thickness of the subsequent concrete pouring.

[0027] The beneficial effects of the method for quickly constructing a new sandwich structure without formwork in an existing multi-storey factory building of the present invention are as follows:

[0028] The construction method of the present invention does not require the intervention of large-scale machinery during the construction process, has little impact on the production and operation of existing factories, saves a lot of labor input, and eliminates the steel bar binding and formwork removal processes in traditional engineering concrete structure construction, greatly improving the construction and production progress of the renovation project under limited space conditions. At the same time, it has a clever design, a simple structure, and is economical and reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a flow chart of a method for rapidly constructing a new sandwich structure without formwork in an existing multi-story factory building.

[0030] Figure 2 This is a schematic diagram of a sandwich structure formed by the rapid formwork-free construction method for newly constructing a sandwich structure in an existing multi-story factory building of the present invention, with part of the internal structure exposed.

[0031] Figure 3 for Figure 2 A1-A1 cross-sectional view.

[0032] Figure 4 It is a cross-sectional view of the connection between the support beam, the connecting beam and the steel plate in the rapid formwork-free construction method for a new sandwich structure of an existing multi-story factory building according to the present invention.

[0033] Figure 5 for Figure 4 A2-A2 cross-sectional view in FIG.

[0034] Figure 6 It is a structural schematic diagram of the connection between the support beam and the existing frame column in the rapid formwork-free construction method of the existing multi-story factory building.

[0035] Figure 7 It is a side view of the connection between the support beam and the existing frame column in the construction method of the new sandwich structure of the existing multi-story factory building without formwork in the present invention. DETAILED DESCRIPTION

[0036] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] See also Figure 1The present invention provides a method for quickly constructing a new mezzanine structure without formwork in an existing multi-story factory building. By combining the advantages of steel structure and concrete structure, the method solves the problem that the use of a larger-sized concrete structure for the newly constructed mezzanine in the renovation of an existing multi-story frame structure factory building cannot meet the clearance requirements of the floor height, and the problem of noise generated by the movement of production equipment on the mezzanine of the steel structure system. The construction method of the present invention not only ensures the safety and durability of the newly constructed mezzanine structure, but also satisfies its functional requirements. In addition, the construction method of the present invention does not require the intervention of large-scale machinery during the construction process, has a relatively low impact on the production and operation of the existing factory building, saves a lot of labor input, eliminates the steel bar binding and formwork removal processes in the construction of traditional engineering concrete structures, and greatly improves the construction and production progress of the renovation project under limited space conditions. At the same time, the design is clever, the structure is simple, and it is economical and reasonable. The construction method of the present invention for quickly constructing a new mezzanine structure without formwork in an existing multi-story factory building is described below in conjunction with the accompanying drawings.

[0038] See also Figure 1 , showing a flowchart of the method for constructing a new sandwich structure of an existing multi-storey factory building without formwork. Figure 1 , the rapid formwork-free construction method for newly building a mezzanine structure in an existing multi-story factory building of the present invention is described.

[0039] like Figure 1 As shown, the method for constructing a new sandwich structure of an existing multi-story factory building quickly without formwork includes the following steps:

[0040] Execute step S11, corresponding to the position of the new mezzanine structure to be constructed, install support beams on the existing frame columns of the existing multi-storey factory building; then execute step S12;

[0041] Execute step S12 to vertically connect a plurality of connecting beams between two adjacent support beams; then execute step S13;

[0042] Execute step S13, lay a steel plate on the support beam, and fold the periphery of the steel plate upward to serve as a side form for the concrete to be poured; then execute step S14;

[0043] Execute step S14, lay a steel mesh on the steel plate; then execute step S15;

[0044] Step S15 is executed to pour concrete onto the steel plate to form a new sandwich structure.

[0045] Furthermore, if Figure 6 and Figure 7 As shown, when installing the support beam 21, an embedded plate 271 is set on the existing frame column 10;

[0046] A connecting plate 272 vertically connected to the embedded plate 271 is provided on the embedded plate 271;

[0047] The end of the support beam 21 is placed against the buried plate 271, and the side of the support beam 271 is placed against the connecting plate 272, and then fixedly connected by bolts.

[0048] The support beam 21 is preferably an I-beam, the web of the I-beam is attached to the connecting plate 272, and then fastened with high-strength bolts.

[0049] The embedded plate 271 is attached to the side of the existing frame column 10 and then fixed to the existing frame column 10 by chemical anchor bolts. The connecting plate 272 is fixed to the embedded plate 271 by welding.

[0050] The location of the support beam 21 is determined according to the bottom elevation of the newly built sandwich structure. After the location of the support beam 21 is determined, the embedded plate 271 is set at the corresponding location.

[0051] Furthermore, it also includes a positioning plate 273 disposed on the buried plate 271 and located below the connecting plate 272;

[0052] When setting the support beam 21, the end of the support beam 21 is placed on the positioning plate 273 for positioning;

[0053] After the support beam 21 and the connecting plate 272 are connected, the support beam 21 and the positioning plate 273 are welded.

[0054] The positioning plate 273 is vertically connected to the embedded plate 271 . The positioning plate 273 is fixed to the embedded plate 271 by welding. The top of the positioning plate 273 supports the bottom of the support beam 21 and is fixed to the support beam 21 by welding.

[0055] Furthermore, the installed support beam 21 is supported and connected to the existing frame column 10 which is arranged oppositely.

[0056] like Figure 4 As shown, the top of the connecting beam 22 is flush with the top of the supporting beam 21. The connecting beam 22 is arranged at intervals along the supporting beam 21. The connecting beam 22 is preferably made of angle steel, and the angle steel is welded and fixed to the upper flange plate of the supporting beam 21.

[0057] Furthermore, if Figures 3 to 5 As shown, when laying the steel plate 23, the laid steel plate 23 is welded and fixed to the corresponding connecting beam 22. The connecting beam 22 supports the steel plate 23, which can effectively reduce the deflection of the steel plate 23.

[0058] The steel plate 23 is preferably a patterned steel plate.

[0059] The steel plate 23 is used as a template for subsequent pouring of concrete. Flanges are set around the entire steel plate, that is, the steel plate at the edge of the new sandwich structure to be formed is bent upward to be used as a concrete side template.

[0060] The steel plates 23 are also welded to the support beams 21 at intervals.

[0061] Furthermore, if Figure 2 and Figure 3 As shown, it also includes: a plurality of shear transfer devices 25 are arranged on the steel plate 23, and the shear transfer devices 25 are arranged vertically.

[0062] The provision of the shear transfer device 25 enables the concrete structure to be effectively combined with the steel plate.

[0063] Preferably, the shear transmitters 25 are arranged in a plum blossom shape on the steel plate 23 according to the spacing requirements, and the shear transmitters 25 are fixed to the steel plate 23 by welding.

[0064] Furthermore, the laid steel mesh 24 is a bidirectional steel mesh. Providing the steel mesh can reduce concrete shrinkage cracks.

[0065] Furthermore, the poured concrete is fine stone concrete to form a fine stone concrete layer 26, which can be used as a decorative layer later and avoid noise during later use.

[0066] Furthermore, the height of the folded side form 231 is consistent with the thickness of the subsequently poured concrete.

[0067] The method for quickly constructing a new mezzanine structure without formwork in an existing multi-story factory building of the present invention solves the problem that directly using a larger-sized concrete structure to construct a new mezzanine in an existing multi-story frame structure factory building cannot meet the clearance requirements of the usable floor height, and the problem that the movement of production equipment on the mezzanine of the steel structure system generates noise. It not only ensures the safety and durability of the newly constructed mezzanine structure, but also can well meet its functional requirements.

[0068] The sandwich structure formed by the method for constructing a new sandwich structure of an existing multi-storey factory building without formwork quickly of the present invention has steel plates and support beams as main load-bearing components. The shear transmission device provided therein can effectively combine the concrete with the steel plate. The provided steel mesh can reduce concrete shrinkage cracks, and the provided connecting beam can be connected to the steel plate to provide support for the steel plate, thereby effectively reducing the deflection of the steel plate.

[0069] The construction method of the present invention does not require the intervention of large-scale machinery during the construction process, has little impact on the production and operation of existing factories, saves a lot of labor input, and eliminates the steel bar binding and formwork removal processes in traditional engineering concrete structure construction, greatly improving the construction and production progress of the renovation project under limited space conditions. At the same time, it has a clever design, a simple structure, and is economical and reasonable.

[0070] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A method for quickly constructing a new sandwich structure without formwork in an existing multi-storey factory building, characterized in that: The steps include: Corresponding to the location of the new mezzanine structure to be constructed, support beams are installed on the existing frame columns of the existing multi-storey factory building; A plurality of coupling beams are vertically connected between two adjacent supporting beams; Laying a steel plate on the support beam, and folding the periphery of the steel plate upwards to serve as a side form for concrete to be poured; Laying a steel mesh on the steel plate; Concrete is poured onto the steel plate to form a new sandwich structure.

2. The method for constructing a new sandwich structure of an existing multi-storey factory building quickly without formwork as claimed in claim 1, characterized in that: When installing the support beam, an embedded plate is arranged on the existing frame column; A connecting plate vertically connected to the embedded plate is arranged on the embedded plate; The end of the support beam is pressed against the embedded plate, and the side of the support beam is pressed against the connecting plate, and then fixedly connected by bolts.

3. The method for constructing a new sandwich structure of an existing multi-storey factory building quickly without formwork as claimed in claim 2, characterized in that: It also includes a positioning plate disposed on the buried plate and located below the connecting plate; When setting the support beam, the end of the support beam is placed on the positioning plate for positioning; After the support beam is connected to the connection plate, the support beam is welded to the positioning plate.

4. The method for constructing a new sandwich structure of an existing multi-storey factory building quickly without formwork as claimed in claim 1, characterized in that: Also includes: A plurality of shear transfer devices are arranged on the steel plate, and the shear transfer devices are arranged vertically.

5. The method for rapidly constructing a new sandwich structure without formwork in an existing multi-storey factory building according to claim 1, characterized in that: The laid steel mesh is a bidirectional steel mesh.

6. The method for constructing a new sandwich structure of an existing multi-storey factory building quickly without formwork as claimed in claim 1, characterized in that: When laying the steel plates, the laid steel plates are welded and fixed to the corresponding connecting beams.

7. The method for rapidly constructing a new sandwich structure without formwork in an existing multi-storey factory building as claimed in claim 1, characterized in that: The top of the connecting beam is arranged flush with the top of the supporting beam.

8. The method for constructing a new sandwich structure of an existing multi-storey factory building quickly without formwork as claimed in claim 1, characterized in that: The poured concrete is fine stone concrete.

9. The method for constructing a new sandwich structure quickly without formwork in an existing multi-storey factory building as claimed in claim 1, characterized in that: The installed support beams are supported and connected to the existing frame columns which are arranged opposite to each other.

10. The method for constructing a new sandwich structure of an existing multi-storey factory building quickly without formwork as claimed in claim 1, characterized in that: The height of the side formwork formed by the fold is consistent with the thickness of the subsequent concrete pouring.

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