A temporary support for high altitude large cantilever steel truss

Abstract

The utility model discloses a temporary support for a high-altitude large cantilever steel truss, comprising a plurality of groups of temporary supports, each group of temporary supports comprising a plurality of lattice columns fixedly arranged in a height direction, the lattice columns comprising main limbs, horizontal rods and oblique rods being arranged between the main limbs, a lattice column foundation being arranged at the bottom of the main limb, the lattice column foundation being arranged with two layers of 12mm steel mesh, a lattice column embedded part being further arranged inside the lattice column foundation, the lattice column embedded part being fixedly connected to the steel mesh, a conversion platform being arranged above the lattice column at the top of the temporary support, each group of temporary supports being fixedly connected to the truss via the conversion platform, the utility model utilizing hot-rolled H-shaped steel, angle steel, sand box, cable wind rope and concrete foundation to form a temporary support frame, which can be used to support the high-altitude steel truss and improve the stability and safety of the large steel structure.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a temporary support of a high-altitude large cantilever steel truss. Background Art

[0002] With the rapid development of the current domestic economy, public buildings such as large sports stadiums and convention and exhibition centers have novel and unique shapes and diverse forms of expression. Various large steel structures are widely used in large venues. The construction of high-altitude large cantilever steel trusses is difficult and has high safety risks. How to solve the problem of safe construction of high-altitude large cantilevers is a technical issue worthy of study.

[0003] This utility model patent is a temporary support for a high-altitude large cantilever steel truss, which is used for high-altitude large cantilever steel structures in large buildings, especially large sports stadiums, football stadiums, etc. that require large-area professional venues and steel structure cantilever structures. This utility model patent aims to solve the problem of temporary support safety for high-altitude large cantilever steel trusses. Utility Model Content

[0004] The utility model aims to address the deficiencies in the prior art and provides a high-altitude large cantilever steel truss temporary support, including several groups of temporary supports, each group of temporary supports including several lattice columns fixedly arranged in the height direction, the lattice columns including main limbs, horizontal bars and diagonal bars arranged between the main limbs, a lattice column foundation arranged at the bottom of the main limb, the lattice column foundation is provided with two layers of 12mm steel mesh, the interior of the lattice column foundation is also provided with lattice column embedded parts, the lattice column embedded parts and the steel mesh are fixedly connected, a conversion platform is arranged above the lattice column at the top of the temporary support, and each group of temporary supports is fixedly connected to the truss through the conversion platform.

[0005] Preferably, the cross-sectional dimensions of each group of temporary supports are 2m×2m, the main limbs are H150 mm×150 mm×7mm×10 mm, the horizontal bars are H100 mm×100 mm×6 mm×8 mm, the cross-sectional dimensions of the diagonal bars are L75 mm×5 mm, the vertical spacing of the horizontal bars is 2.5m, and the steel material is Q235B.

[0006] Preferably, the size of the lattice column foundation is 3m×3m×0.5m, which is a C30 concrete foundation, and the lattice column embedded parts adopt embedded parts plates PL300 mm×300 mm×14 mm.

[0007] Preferably, the number of the temporary supports is 36, and one temporary support is arranged at the node of the ring beam at the end of each main truss, and the support height is 43 meters.

[0008] Preferably, the outer side of each group of temporary supports is fixed with cables, the diameter of the cables is 16 mm, and there are four of them. One end of each cable is fixedly connected to the inclined beam of the stand, and the other end is fixed to the connection node of the lattice column in the temporary support.

[0009] Preferably, the conversion platform includes a conversion beam at the bottom, the specifications of the conversion beam are H300 mm×300 mm×10mm×15 mm, and a truss main support and secondary supports on both sides of the main support are fixed above the conversion beam. The main support and the secondary support have the same size, and the main support is a sandbox made of 402 round tubes.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model utilizes hot-rolled H-shaped steel, angle steel, sand box, cable wind rope, and concrete foundation to form a temporary support frame, which can be used to support high-altitude steel trusses and improve the stability and safety of large steel structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0012] Figure 1 It is a schematic diagram of temporary support of the utility model.

[0013] Figure 2 This is a schematic diagram of temporary support distribution of the utility model.

[0014] Figure 3 This is a schematic diagram of a temporary support installation of the utility model.

[0015] Figure 4 It is a schematic diagram of the lattice column structure of the utility model.

[0016] Figure 5 This is a schematic diagram of the installation of the bottom temporary support of the utility model.

[0017] Figure 6 This is a schematic diagram of the installation of multiple sets of temporary supports of the utility model.

[0018] Figure 7 This is a schematic diagram of the completion of the installation of multiple sets of temporary supports of the utility model.

[0019] Figure 8 This is a schematic diagram of the conversion platform structure of the utility model.

[0020] In the figure: 1. temporary support, 2. lattice column, 3. main limb, 4. horizontal rod, 5. diagonal rod, 6. lattice column foundation, 7. steel mesh, 8. lattice column embedded parts, 10. guy rope, 11. transfer beam, 12. truss main support, 13. secondary support. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is described in detail below with reference to the accompanying drawings, but the protection scope of the utility model is not limited to the embodiments.

[0022] Reference Figures 1 to 8 The utility model discloses a temporary support for a high altitude large cantilever steel truss, comprising a plurality of groups of temporary supports 1, each group of temporary supports 1 comprising a plurality of lattice columns 2 fixedly arranged in the height direction, the lattice columns 2 comprising main limbs 3, horizontal bars 4 and oblique bars 5 being arranged between the main limbs 3, a lattice column foundation 6 being arranged at the bottom of the main limbs 3, the lattice column foundation 6 being provided with a second layer of 12 mm steel mesh 7, a lattice column embedded part 8 being further arranged inside the lattice column foundation 6, the lattice column embedded part 8 being fixedly connected to the steel mesh 7, the size of the lattice column foundation 6 being 3mX3mX0.5m, being a C30 concrete foundation, the lattice column embedded part 8 adopts an embedded part plate PL300×300×14, the top of the temporary support 1 A conversion platform is set above the lattice column of the part, and each group of temporary supports 1 is fixedly connected to the truss through the conversion platform. In the utility model, there are a total of four main limbs 3 of the lattice column, which are the main support columns of the lattice column. Horizontal rods 4 and diagonal rods 5 are installed between two adjacent main limbs 3. The setting of the horizontal rods 4 and the diagonal rods 5 is used to increase the overall strength of the lattice column, so that the temporary support 1 after installation has a high bearing capacity. The steel mesh 7 is pre-fixed before the concrete foundation is poured. After the concrete foundation is poured, the strength and tensile strength of the concrete foundation can be effectively improved, so that the bottom strength of the temporary support 1 is increased. The lattice column embedded parts 8 are welded to the main limbs 3 and fixed to the steel mesh 7, so that the main limbs 3 and the concrete foundation are firmly fixed.

[0023] In the utility model, the cross-sectional dimensions of each group of temporary supports 1 are 2mX2m, the main limbs 3 are H150X150X7X10, the horizontal bars 4 are H100X100X6X8, the cross-sectional dimensions of the diagonal bars 5 are L75×5, the vertical spacing of the horizontal bars 4 is 2.5m, and the steel material is Q235B.

[0024] The number of temporary supports 1 in the utility model is 36, and one temporary support 1 is arranged at the node of the ring beam at the end of each main truss, and the support height is 43 meters. The number and height of the temporary supports 1 depend on the number and height of the cantilever steel trusses.

[0025] In addition, in order to further strengthen the strength of the support system and take into account the high frequency of strong wind loads on site, the temporary support 1 is fixed with cables 10 on the outside to strengthen the lateral stability of the support system. The diameter of the cables 10 is 16 mm, and there are four of them. One end of each cable 10 is fixedly connected to the inclined beam of the stand, and the other end is fixed to the connection node of the lattice column in the temporary support 1.

[0026] Finally, a conversion platform is set on the top of each group of temporary supports 1 of the utility model, and the conversion platform includes a conversion beam 11 at the bottom. The specifications of the conversion beam 11 are H300Χ300Χ10Χ15. A truss main support 12 is fixed above the conversion beam 11. The truss main support 12 is a sand box made of 402 round tubes, and a secondary support 13 is set on both sides. The specifications are consistent with the main support. The secondary support 13 needs to be removed in advance before unloading.

[0027] The construction steps of the utility model are as follows;

[0028] Excavate 1 meter down from the current site surface to the surface of the football field foundation, compact the bottom of the pit, first backfill 0.5 meters with ballast or construction waste and compact it, then pour 0.5 meters of C30 concrete. The lattice column foundation 6 uses two layers of 12mm steel mesh 7

[0029] The temporary support 1 is installed with a 200t crawler crane, and the main arm length is 61.5m. The installation is carried out in stages, divided into 2 sections: pouring the C30 concrete foundation of the lattice column, 3m x 3m x 0.5m; using a 200t crawler crane to install the first section of the 12m lattice column; using a 200t crawler crane to install the 2nd to 3rd standard sections and the non-standard section on the top of the lattice column and pull the cable wind rope 10, and the lattice column installation is completed.

[0030] Temporary support 1 is removed after the whole structure is unloaded. First, the upper part of temporary support 1 is lifted by a truck crane, and the main limb 3 of temporary support 1 is cut by manual cutting to complete the removal. The first stage of removal is the top platform and the first 12m standard section, the second stage of removal is the second 12m standard section, and the third stage is to remove the remaining support frame of the upper structure of the stand. Specifically, the top platform is removed by a truck crane, and the guy rope 10 is removed; the standard section is removed by a truck crane, the support frame is lifted, and the connection between the support and the lattice column foundation 6 is cut; the support foundation is broken.

[0031] As above, although the utility model has been shown and described with reference to a specific preferred embodiment, it should not be interpreted as limiting the utility model itself. Various changes can be made to it in form and detail without departing from the spirit and scope of the utility model defined in the attached claims.

Claims

1. A temporary support for a high altitude large cantilever steel truss, characterized by: It includes several groups of temporary supports, each group of temporary supports includes several lattice columns fixed in height direction, the lattice columns include main limbs, horizontal bars and diagonal bars are arranged between the main limbs, a lattice column foundation is arranged at the bottom of the main limb, the lattice column foundation is provided with two layers of 12mm steel mesh, and lattice column embedded parts are also arranged inside the lattice column foundation, the lattice column embedded parts and the steel mesh are fixedly connected, a conversion platform is arranged above the lattice column at the top of the temporary support, and each group of temporary supports is fixedly connected to the truss through the conversion platform.

2. The high altitude large cantilever steel truss temporary support according to claim 1 is characterized by: The cross-sectional dimensions of each group of temporary supports are 2m×2m, the main limbs are H150 mm×150 mm×7 mm×10 mm, the horizontal bars are H100 mm×100 mm×6 mm×8 mm, the cross-sectional dimensions of the diagonal bars are L75 mm×5 mm, the vertical spacing of the horizontal bars is 2.5m, and the steel material is Q235B.

3. The high altitude large cantilever steel truss temporary support according to claim 2 is characterized by: The dimensions of the lattice column foundation are 3m×3m×0.5m, which is a C30 concrete foundation. The lattice column embedded parts use embedded plate PL300 mm×300 mm×14 mm.

4. The high altitude large cantilever steel truss temporary support according to claim 3 is characterized by: The number of temporary supports is 36, and one temporary support is set at the node of the ring beam at the end of each main truss, and the support height is 43 meters.

5. The high altitude large cantilever steel truss temporary support according to claim 4 is characterized by: The outer side of each group of temporary supports is fixed with cables. The diameter of the cables is 16 mm, and there are four of them. One end of each cable is fixedly connected to the inclined beam of the stand, and the other end is fixed to the connection node of the lattice column in the temporary support.

6. The high altitude large cantilever steel truss temporary support according to claim 5 is characterized by: The conversion platform includes a conversion beam at the bottom, and the specifications of the conversion beam are H300 mm×300 mm×10 mm×15 mm. A truss main support and secondary supports on both sides of the main support are fixed above the conversion beam. The main support and the secondary support have the same size. The main support is a sandbox made of 402 round tubes.

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