Temporary supporting jig frame for mounting double-layer large-span cantilever truss

Abstract

The utility model discloses a temporary supporting jig frame for installing a double-layer large-span cantilever truss. The temporary supporting jig frame comprises a plurality of jig frame standard knots. A space used for installing a structure for supporting a truss chord member is reserved between the jig frame standard knots, a plurality of vertically-arranged profile steel stand columns are installed in the space, the two ends of each profile steel stand column are fixedly connected with the upper jig frame standard knot and the lower jig frame standard knot respectively, and at least two supporting layers defined by sequentially connecting a plurality of conversion cross beams are welded to the profile steel stand columns. Wherein one supporting layer is fixedly provided with a supporting bracket beam which is horizontally arranged, the supporting bracket beam is fixedly provided with a supporting bracket column which is vertically arranged and is used for supporting a truss chord member, and a plurality of profile steel lacing bars are welded between the supporting layers. The temporary supporting jig frame for mounting the double-layer large-span cantilever truss is reasonable in structural design, can be used for mounting two layers of trusses at the same time by using a single group of supporting jig frames, not only reduces the measure quantity, improves the field utilization rate, but also improves the construction efficiency and reduces the construction cost, and has a good application prospect.

Description

Technical Field

[0001] The utility model relates to the technical field of support brackets, and relates to a temporary support bracket for the installation of a double-layer large-span cantilever truss. Background Art

[0002] With the development of the construction industry, steel structures have been widely used in modern buildings due to their advantages such as uniform quality, high strength, small self-weight, good seismic resistance, large indoor space, rapid construction, low carbon emission reduction, environmental protection, and circular economy. Large-span cantilever steel structures have become the mainstream direction of the development of the public construction industry, and the design of double-layer large-span cantilevers is also common.

[0003] At present, temporary support brackets are mostly used for the installation of large-span cantilever steel structures. To ensure construction efficiency, prefabricated standard brackets + support brackets are usually used to set up the temporary support brackets at the position of the steel structure cantilever truss, and they are installed in a certain order by using a combination of integral truss assembly, hoisting and loose-piece hoisting methods. However, for double-layer trusses at the same horizontal projection line position, conventionally, double groups of support brackets are set on both sides of the truss support points to avoid the first-layer truss, and a transfer beam is used between the brackets to transmit the force of the truss to the brackets. The construction method of the above-mentioned temporary support brackets consumes relatively more measures, time and labor for the construction of large-span cantilever trusses, greatly increasing the construction hazards and construction costs on site.

[0004] Therefore, it is of great practical significance to develop a temporary support bracket for the installation of double-layer large-span cantilever trusses with small measures, short construction period and low cost. Summary of the Utility Model

[0005] Due to the above defects in the prior art, the utility model provides a temporary support bracket for the installation of double-layer large-span cantilever trusses with small measures, short construction period and low cost, and solves the defects that two groups of temporary support brackets are required for the existing double-layer large-span cantilever trusses, with large measures, long construction period and high cost.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A temporary support bracket for the installation of a double-layer large-span cantilever truss, comprising a plurality of standard bracket sections;

[0008] There is a space between the standard sections of the falsework for installing the structure for supporting the truss chord. Multiple vertically arranged steel columns are installed in this space, and both ends of the steel columns are fixedly connected to the upper and lower falsework standard sections respectively. At least two layers of support layers surrounded by multiple conversion cross beams connected in sequence are welded on the steel columns. A horizontally arranged support bracket beam is fixed on one of the support layers. A vertically arranged support bracket column for supporting the truss chord is fixed on the support bracket beam. Multiple steel batten bars are welded between the support layers.

[0009] The specific specifications, materials and dimensions of the above-mentioned fittings such as steel columns, conversion cross beams, support bracket beams, support bracket columns and steel batten bars can be determined according to the specifications of the falsework standard sections and the support requirements.

[0010] The operation steps of the above-mentioned temporary support falsework are as follows: Connect and assemble in sequence. Its bottom can be connected to the foundation in the form of a conventional support falsework. Use the falsework standard sections to build the falsework section by section to the height of the first-layer truss. The chord of the first-layer truss passes through the support falsework through the gaps between the steel batten bars between the support layers. Continue to use the falsework standard sections above to the position of the second-layer truss and support it in the form of a conventional support falsework.

[0011] When installing the large-span cantilever truss, the above-mentioned falsework can use a single set of support falsework to install two layers of trusses at the same time, greatly reducing the usage amount of the support falsework and the labor amount.

[0012] The temporary support falsework for installing the double-layer large-span cantilever truss of the present utility model has a reasonable structural design. There is a space for supporting the truss reserved between the vertically arranged falsework standard sections. A device for supporting the truss is provided in this space. At the same time, the design for strengthening the structural strength is carried out in this space. This falsework greatly facilitates the bottom truss to pass through the falsework, solves the problem of collision between the bottom truss and the falsework batten bars when passing through the standard support falsework, and has good application prospects.

[0013] As a preferred technical solution:

[0014] For the temporary support falsework for installing the double-layer large-span cantilever truss as described above, there are four steel columns in total, and the four steel columns are respectively fixedly connected to the four corners of the falsework standard section.

[0015] For the temporary support falsework for installing the double-layer large-span cantilever truss as described above, connecting plates are provided at the four corners of the falsework standard section;

[0016] Both ends of the steel column are provided with column connecting plates matching the connecting plates.

[0017] For the temporary support falsework for installing the double-layer large-span cantilever truss as described above, through holes for bolts to pass through are opened on the column connecting plates and the connecting plates;

[0018] The standard section of the falsework is fixedly connected to the steel column by bolts.

[0019] A temporary support falsework for the installation of a double - layer large - span cantilever truss as described above, wherein the support layer is in a shape of a Chinese character 'Ri' surrounded by five conversion cross - beams, and the structural strength of the support layer is good;

[0020] The conversion cross - beams are horizontally arranged and welded to the steel columns.

[0021] A temporary support falsework for the installation of a double - layer large - span cantilever truss as described above, on the side corresponding to the arrangement direction of the truss chord, there are a total of four steel batten plates. The four steel batten plates enclose a square structure (the truss chord can pass through the hollow part of the square structure, and at the same time, the square structure can strengthen the support for the space between the upper and lower standard sections of the falsework), and the two ends of the steel batten plates are respectively welded to the steel column and the conversion cross - beam;

[0022] On the side not corresponding to the arrangement direction of the truss chord in the space, there is only one steel batten plate. The two ends of the steel batten plate are respectively welded to the two steel columns, and it encloses a Z - shaped structure with the two steel columns to provide effective support for the space between the upper and lower standard sections of the falsework, avoiding the collapse of this space under heavy pressure.

[0023] A temporary support falsework for the installation of a double - layer large - span cantilever truss as described above, the standard section of the falsework is provided with side strengthening bars.

[0024] A temporary support falsework for the installation of a double - layer large - span cantilever truss as described above, stiffening plates are provided on both the support bracket beam and the conversion cross - beam, and the material and specification of the stiffening plate are the same as those of the steel flange it is connected to.

[0025] The above technical solutions are only a feasible technical solution of the present utility model. The protection scope of the present utility model is not limited thereto. Those skilled in the art can reasonably adjust the specific design according to actual needs.

[0026] The above - mentioned utility model has the following advantages or beneficial effects:

[0027] The temporary support falsework for the installation of a double - layer large - span cantilever truss of the present utility model has a reasonable structural design. Using a single set of support falsework can be used for the installation of two - layer trusses at the same time. Not only the quantity of falsework support measures is reduced by several times, improving the utilization rate of the construction site, but also the installation and disassembly workload of the measures is correspondingly reduced, reducing the potential safety hazards in on - site construction, improving the construction efficiency, reducing the project construction cost, improving the project economic benefits, overcoming the defects that the current double - layer large - span cantilever truss requires double - set support falsework, with a large amount of on - site falsework, large construction volume and high construction cost, and has good application prospects. Description of the Drawings

[0028] The present utility model, its features, shape and advantages will become more obvious by reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the emphasis is on showing the gist of the present utility model.

[0029] Figure 1 It is a top view of the temporary support falsework for the installation of a double-layer large-span cantilever truss of the present utility model;

[0030] Figure 2 is Figure 1 View from the A-A perspective;

[0031] Figure 3 is Figure 1 View from the B-B perspective;

[0032] Among them, 1 is the standard section of the falsework, 2 is the truss chord, 3 is the steel column, 4 is the steel batten, 5 is the conversion cross beam, 6 is the support bracket beam, 7 is the support bracket column, 8 is the stiffening plate, and 9 is the connecting plate. Detailed implementation manners

[0033] The following further illustrates the structure in the present utility model with reference to the drawings and specific embodiments, but it is not a limitation of the present utility model.

[0034] Embodiment 1

[0035] A temporary support falsework for the installation of a double-layer large-span cantilever truss, as Figures 1 to 3 shown, includes a plurality of standard sections 1 of the falsework, and the standard section 1 of the falsework is provided with side strengthening bars of the standard section;

[0036] There is a space between the standard sections 1 of the falsework for installing the structure for supporting the truss chord 2, and four vertically arranged steel columns 3 are installed in the space, and both ends of the steel column 3 are fixedly connected to the upper and lower standard sections 1 of the falsework (the four steel columns 3 are respectively fixedly connected to the four corners of the standard section 1 of the falsework, connecting plates 9 are provided at the four corners of the standard section 1 of the falsework, column connecting plates matching the connecting plates 9 are provided at both ends of the steel column 3, through holes for bolts to pass through are opened on the column connecting plates and the connecting plates 9, and the standard section 1 of the falsework and the steel column 3 are fixedly connected by bolts), and two layers of support layers surrounded by a plurality of conversion cross beams 5 connected in sequence are welded on the steel column 3 (the support layer is a structure in the shape of a Chinese character 'ri' surrounded by five conversion cross beams 5, the conversion cross beams 5 are horizontally arranged and the conversion cross beams 5 are welded to the steel column 3), a horizontally arranged support bracket beam 6 is fixed on one of the support layers, a vertically arranged support bracket column 7 for supporting the truss chord 2 is fixed on the support bracket beam 6, a plurality of steel battens are welded between the support layers, and there are four steel battens 4 on the side of the space corresponding to the arrangement direction of the truss chord 2, and the four steel battens 4 enclose a structure in the shape of a Chinese character 'kou' (asFigure 3 As shown in the figure, both ends of the profiled steel batten 4 are respectively welded to the profiled steel columns 3 and the conversion cross beam 5. There is only one profiled steel batten 4 on the side where the spatial layout direction of the truss chord 2 is not corresponding. Both ends of the profiled steel batten 4 are respectively welded to the two profiled steel columns 3 and form a Z-shaped structure with the two profiled steel columns 3 (as Figure 2 shown in the figure). Stiffening plates 8 are provided on both the support bracket beam 6 and the conversion cross beam 5.

[0037] The operation steps of the above-mentioned temporary support falsework are as follows:

[0038] The standard section of the falsework at the bottom can be connected to the foundation in the form of a conventional support falsework. The standard section of the falsework is used to build this falsework section by section to the height of the first-floor truss. The chord of the first-floor truss passes through the support falsework through the gap of the profiled steel batten that forms a square structure between the support layers. The standard section of the falsework is continuously used in the upper part to the position of the second-floor truss and is supported in the form of a conventional support falsework.

[0039] It has been verified that the temporary support falsework for the installation of the double-layer large-span cantilever truss of the present utility model has a reasonable structural design. A single set of support falsework can be used for the installation of two layers of trusses at the same time. Not only the quantity of the support falsework measures is reduced by several times, the utilization rate of the construction site is improved, but also the installation and disassembly workload of the measures is correspondingly reduced, the potential safety hazards in the on-site construction are reduced, the construction efficiency is improved, the project construction cost is reduced, the project economic benefit is improved, and the defect that the current double-layer large-span cantilever truss requires double sets of support falsework, with a large amount of on-site falsework, a large amount of construction work, and a high construction cost is overcome, and the application prospect is good.

[0040] Those skilled in the art should understand that those skilled in the art can realize the variation examples in combination with the prior art and the above-mentioned embodiments, which will not be elaborated here. Such variation examples do not affect the essence of the present utility model and will not be elaborated here.

[0041] The preferred embodiments of the present utility model have been described above. It should be understood that the present utility model is not limited to the above specific implementation manners. The equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present utility model, or modify it into an equivalent embodiment with equivalent changes, which does not affect the essence of the present utility model. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still fall within the scope of the protection of the technical solution of the present utility model.

Claims

1. A temporary support falsework for the installation of a double-layer long-span cantilever truss, characterized in that: It includes several standard sections of the jig. There is a space for installing the structure of the supporting truss chord between the standard sections of the jig. Multiple vertically arranged steel columns are installed in the space, and both ends of the steel columns are fixedly connected to the upper and lower standard sections of the jig respectively. At least two layers of supporting layers surrounded by multiple conversion cross beams connected in sequence are welded on the steel columns. A horizontally arranged supporting bracket beam is fixed on one of the supporting layers. A vertically arranged supporting bracket column for supporting the truss chord is fixed on the supporting bracket beam. Multiple steel batten bars are welded between the supporting layers.

2. The temporary support falsework for the installation of a double-layer long-span cantilever truss according to claim 1, characterized in that, There are four steel columns in total, and the four steel columns are respectively fixedly connected to the four corners of the standard section of the jig.

3. The temporary support falsework for the installation of a double-layer long-span cantilever truss according to claim 2, wherein Connecting plates are provided at the four corners of the standard section of the jig. Column connecting plates matching the connecting plates are provided at both ends of the steel column.

4. The temporary support falsework for the installation of a double-layer long-span cantilever truss according to claim 3, characterized in that, Through holes for bolts to pass through are opened on the column connecting plates and the connecting plates. The standard section of the jig and the steel column are fixedly connected by bolts.

5. The temporary support falsework for the installation of a double-layer long-span cantilever truss according to claim 1, wherein The supporting layer is a structure in the shape of a Chinese character 'Ri' surrounded by five conversion cross beams. The conversion cross beams are horizontally arranged and welded to the steel columns.

6. The temporary support falsework for the installation of a double-layer long-span cantilever truss according to claim 1, wherein, There are four steel batten bars on the side of the space corresponding to the arrangement direction of the truss chord. The four steel batten bars surround a structure in the shape of a square, and both ends of the steel batten bars are respectively welded to the steel column and the conversion cross beam. There is only one steel batten bar on the side of the space not corresponding to the arrangement direction of the truss chord. Both ends of the steel batten bar are respectively welded to the two steel columns, and it forms a Z-shaped structure with the two steel columns.

7. The temporary support falsework for the installation of a double - layer long - span cantilever truss according to claim 1, wherein, The standard section of the jig is provided with a side strengthening bar for the standard section.

8. The temporary support falsework for the installation of a double-layer long-span cantilever truss according to claim 1, characterized in that, Stiffening plates are provided on both the supporting bracket beam and the conversion cross beam.

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