Cast-in-place concrete structure steel formwork

Abstract

The utility model relates to the technical field of building construction, in particular to a cast-in-place concrete structure steel formwork which comprises a framework device, a panel device and a connecting device. An annular arc-shaped component formed by processing a square steel tube is welded on the outer wall of the vertical arc-shaped component; the panel device comprises a plurality of trapezoidal blocks formed by cutting a steel plate, and the upper and lower widths of the trapezoidal blocks are equal to the arc length of the vertical arc-shaped component; the connecting device comprises L-shaped angle steel, the angle steel is welded to vertical arc-shaped components on the two sides of the framework device, the connecting positions of the framework device are connected and fixed through bolts, and the mushroom-shaped formwork is formed. And the problems that large potential safety hazards exist during high-altitude or narrow space operation, curved surface forming depends on artificial experience, cambered surface errors are easily caused, the concrete surface is uneven, and grout leaks are solved.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a steel formwork for cast-in-place concrete structures. Background Technology

[0002] With the booming development of the construction industry, the application of irregularly shaped concrete structures in architectural design is becoming increasingly widespread, especially components with unique aesthetic value such as mushroom shapes, which have become the finishing touch for many landmark buildings. However, many drawbacks of traditional construction methods have become bottlenecks restricting the development of irregularly shaped concrete structures. From a cost perspective, the high waste rate and low reuse rate of materials significantly increase the formwork cost of individual projects, which not only compresses the profit margins of construction companies but also limits the application of irregularly shaped concrete structures in more small and medium-sized projects. In terms of construction period, the long construction cycle seriously affects the overall progress of the project, increases the project management costs and capital occupation costs, and reduces the competitiveness of construction companies in the market.

[0003] Safety hazards are also a serious concern. Frequent accidents involving work at heights not only severely threaten the lives of construction workers but also cause significant economic losses and negative social impacts for companies. Quality defects, such as uneven concrete surfaces and grout leakage, not only affect the building's appearance and structural durability but can also lead to customer complaints and legal disputes. Furthermore, as the construction industry increasingly emphasizes green construction and energy conservation, the high energy consumption and pollution of traditional construction methods run counter to industry trends. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this application provides a steel formwork for cast-in-place concrete structures, which aims to achieve efficient, safe, and high-quality construction of mushroom-shaped irregular concrete components, and meet the growing diversified needs and sustainable development requirements of the construction industry.

[0005] The technical means adopted by this utility model to solve its technical problem is: a steel formwork for cast-in-place concrete structures, the improvement of which is that it includes a frame device, a panel device, and a connecting device, wherein...

[0006] The skeleton device includes a vertical arc-shaped component spliced ​​from square steel tubes, and a circumferential arc-shaped component processed from square steel tubes is welded to the outer wall of the vertical arc-shaped component.

[0007] The panel device includes several trapezoidal blocks cut from steel plates, the width of the trapezoidal blocks being proportional to the arc length of the vertical arc member;

[0008] The connecting device includes an "L"-shaped angle steel, which is welded to the vertical arc-shaped components on both sides of the frame device. The joint of the frame device is fixed by bolts to form a mushroom-shaped template.

[0009] The number of L-shaped angle steel connections mentioned in the above technical solution is determined according to the arc length of the vertical arc member, and the spacing between the L-shaped angle steels is no more than 500mm.

[0010] The wall thickness of the square steel pipe in the above technical solution is not less than 3mm, and the material of the square steel pipe is Q235B carbon structural steel.

[0011] The steel plate in the above technical solution has a thickness of 1-3mm, and the surface of the steel plate is provided with an anti-rust coating, which is an epoxy zinc-rich primer with a coating thickness of not less than 80μm.

[0012] The number of circumferential arc-shaped components in the above technical solution is no less than three, and they are evenly distributed along the height direction of the vertical arc-shaped components.

[0013] When the three skeleton devices described in the above technical solution are connected and fixed in pairs by bolts, the bolts used are M12-M16, the bolt material is 8.8 grade high strength bolts, and washers and spring washers are provided at the bolt connection to prevent the bolts from loosening; at the same time, anti-rust grease is applied to the bolt connection.

[0014] After the mushroom-shaped template described in the above technical solution is assembled, its overall dimensional deviation should meet the following requirements: the length deviation should not exceed ±5mm, the width deviation should not exceed ±3mm, and the height deviation should not exceed ±4mm.

[0015] When the trapezoidal blocks of the panel device described in the above technical solution are spliced, the width of the splicing gap between adjacent trapezoidal blocks is no more than 1mm, and the splicing gap is filled with elastic sealant; at the same time, after the trapezoidal blocks are spliced, the entire panel surface is polished so that the surface flatness error does not exceed 2mm / m.

[0016] The beneficial effects of this utility model are:

[0017] This application can solve the problems of long construction cycles, significant safety hazards when working at heights or in confined spaces, and the reliance on manual experience in curved surface forming, which can easily lead to arc surface errors, resulting in uneven concrete surfaces and grout leakage. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a steel formwork skeleton device for a cast-in-place concrete structure, as shown in an embodiment of the present invention.

[0019] Figure 2This is a schematic diagram of a panel device for a steel formwork for a cast-in-place concrete structure, as shown in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of a connection device for a steel formwork of a cast-in-place concrete structure, as shown in an embodiment of this utility model. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / linkages involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. The various technical features in this utility model can be combined interactively without contradicting each other.

[0023] like Figure 1-3 As shown, this application provides a steel formwork for cast-in-place concrete structures, including a frame device 1, a panel device 2, and a connecting device 3, wherein...

[0024] The skeleton device 1 includes three 120° vertical arc-shaped components 11 spliced ​​together from square steel tubes, and the outer wall of the vertical arc-shaped components 11 is welded with a circumferential arc-shaped component 12 processed from square steel tubes.

[0025] The panel device 2 includes several trapezoidal blocks cut from steel plates, the upper and lower widths of which are proportional to the arc length of the vertical arc member 11;

[0026] The connecting device 3 includes an "L"-shaped angle steel, which is welded to the vertical arc-shaped components 11 on both sides of the skeleton device 1. The three skeleton devices 1 are connected and fixed in pairs by bolts to form a mushroom-shaped template.

[0027] In one possible implementation, the number of L-shaped angle steel connections is determined based on the arc length of the vertical arc member 11, and the spacing between the L-shaped angle steels is no greater than 500mm.

[0028] Specifically, the thickness of the "L"-shaped angle steel is not less than 4mm, and the surface of the "L"-shaped angle steel is coated with the same anti-rust coating as the steel plate after rust removal treatment, namely epoxy zinc-rich primer, with a coating thickness of not less than 80μm.

[0029] In one possible implementation, the wall thickness of the square steel tube is not less than 3mm, and its material is the same as that of the angle steel, both being Q235B carbon structural steel.

[0030] Specifically, when the square steel pipes are spliced ​​to form a vertical arc-shaped component 1, the width of the splicing gap between adjacent square steel pipes is no more than 1mm, and the splicing is carried out by full welding process. After welding, the weld is ground to make its surface smooth and free of obvious weld beads, undercut and other defects.

[0031] In one possible implementation, the steel plate has a thickness of 1-3 mm, and the surface of the steel plate is provided with an anti-rust coating, which is an epoxy zinc-rich primer with a coating thickness of not less than 80 μm.

[0032] Specifically, a polyurethane topcoat is applied over the epoxy zinc-rich primer. The polyurethane topcoat has a coating thickness of not less than 60 μm to enhance the rust and corrosion resistance and appearance quality of the steel plate. Before the steel plate is cut into trapezoidal blocks, it is leveled to ensure that its flatness error is not greater than 1 mm / m, so as to ensure the overall flatness of the trapezoidal blocks after splicing.

[0033] In one possible implementation, the number of the circumferential arc-shaped members 12 is not less than three, and they are evenly distributed along the height direction of the vertical arc-shaped members.

[0034] Specifically, the welding between the circumferential arc member 12 and the vertical arc member 11 is carried out by intermittent welding, with a weld length of not less than 50 mm and a weld spacing of not more than 100 mm, to ensure the firmness and stability of the connection between the two; the wall thickness of the circumferential arc member 12 is the same as the wall thickness of the square steel tube, and its material is also Q235B carbon structural steel.

[0035] In one possible implementation, when the three frame devices 1 are connected and fixed in pairs by bolts, the bolts used are of M12-M16 specifications, the bolts are made of 8.8 grade high strength bolts, and washers and spring washers are provided at the bolt connection to prevent the bolts from loosening; at the same time, anti-rust grease is applied to the bolt connection to extend the service life of the bolts.

[0036] In one possible implementation, after the mushroom-shaped template is assembled, its overall dimensional deviation should meet the following requirements: the length deviation should not exceed ±5mm, the width deviation should not exceed ±3mm, and the height deviation should not exceed ±4mm, so as to ensure the installation accuracy of the template and the forming quality of the concrete structure.

[0037] In one possible implementation, when the trapezoidal blocks of the panel device 2 are spliced, the width of the splicing gap between adjacent trapezoidal blocks is no more than 1mm, and the splicing gap is filled with elastic sealant; at the same time, after the trapezoidal blocks are spliced, the entire panel surface is polished so that its surface flatness error does not exceed 2mm / m.

[0038] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A steel formwork for cast-in-place concrete structures, characterized in that, It includes a frame assembly, a panel assembly, and a connecting assembly, wherein, The skeleton device includes several vertical arc-shaped components spliced ​​together from square steel tubes, and the outer wall of the vertical arc-shaped components is welded with circumferential arc-shaped components processed from square steel tubes. The panel device includes several trapezoidal blocks cut from steel plates, the width of the trapezoidal blocks being proportional to the arc length of the vertical arc member; The connecting device includes an "L"-shaped angle steel, which is welded to the vertical arc-shaped components on both sides of the frame device. The joint of the frame device is fixed by bolts to form a mushroom-shaped template.

2. The steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, The number of L-shaped angle steel connections is determined according to the arc length of the vertical arc-shaped component, and the spacing between the L-shaped angle steels is no more than 500mm.

3. The steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, The wall thickness of the square steel pipe is not less than 3mm, and the material of the square steel pipe is Q235B carbon structural steel.

4. A steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, The steel plate has a thickness of 1-3mm and a rust-proof coating on its surface. The rust-proof coating is an epoxy zinc-rich primer with a coating thickness of not less than 80μm.

5. A steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, The number of the circumferential arc-shaped components is no less than three, and they are evenly distributed along the height direction of the vertical arc-shaped components.

6. A steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, When the three frame devices are connected and fixed in pairs by bolts, the bolts used are M12-M16, the bolt material is 8.8 grade high strength bolts, and washers and spring washers are set at the bolt connection to prevent the bolts from loosening; at the same time, anti-rust grease is applied to the bolt connection.

7. A steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, After assembly, the overall dimensional deviation of the mushroom-shaped template should meet the following requirements: the length deviation should not exceed ±5mm, the width deviation should not exceed ±3mm, and the height deviation should not exceed ±4mm.

8. A steel formwork for cast-in-place concrete structures according to claim 1, characterized in that, When the trapezoidal blocks of the panel device are spliced ​​together, the width of the splicing gap between adjacent trapezoidal blocks is no more than 1mm, and the splicing gap is filled with elastic sealant; at the same time, after the trapezoidal blocks are spliced, the entire panel surface is polished so that the surface flatness error does not exceed 2mm / m.

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