Cantilever steel bar truss floor support plate supporting device

Abstract

The utility model provides a supporting device for a cantilever steel bar truss floor bearing plate. The supporting device aims at solving the problems that in the prior art, a supporting mode damages a main body structure, and construction is complex. The device comprises an upper connecting plate, a lower connecting piece, an upper supporting rod, a lower supporting rod and a deflection sensor, the upper connecting plate is pre-welded to the outer side of an upper flange of a steel beam, the lower connecting piece comprises a lower wing plate and a connecting web, the lower wing plate is pre-welded to the outer side of a lower flange of the steel beam, and the upper supporting rod comprises connecting L-shaped steel and supporting L-shaped steel; the two ends of the lower supporting rod are fixedly connected with the connecting web and the supporting L-shaped steel respectively, and the upper end of the supporting L-shaped steel is flush with the upper end of the upper connecting plate and the upper end of the steel beam. The device is connected with the steel beam through the prefabricated connecting piece, the stress structure of the steel beam cannot be damaged, the construction efficiency and safety of the cantilever steel bar truss floor support plate are remarkably improved, and the upper connecting plate and the lower connecting piece can serve as connecting points of later external maintenance wallboards and curtain wall embedded parts.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to a cantilever steel truss floor deck support device. Background Technology

[0002] With the widespread adoption of prefabricated buildings, especially steel structure buildings, steel truss floor decking (hereinafter referred to as "floor decking") is widely used in public buildings. Floor decking has the characteristics of good load-bearing capacity, simple support form, and high degree of factory processing.

[0003] However, during steel structure construction, the construction quality of cantilevered steel truss floor slabs is difficult to control. Common support methods include the following:

[0004] 1. Erecting independent steel pipe scaffolding or setting up rows of independent steel columns (such as adjustable steel supports) under the cantilever area, and using a steel pipe scaffolding support system according to the support method of the concrete structure cantilever slab, this construction method makes it difficult to combine the steel pipe scaffolding, timber and steel truss floor slab; the support method is complicated and wastes the excellent performance of the steel truss floor slab itself in supporting simple structures; low-rise steel structure buildings do not need external protective scaffolding, but the area supported by the cantilever steel truss floor slab must be equipped with separate external protective scaffolding, and the use of independent steel column support greatly increases the project cost.

[0005] 2. Directly welding (bolting) a triangular frame to the steel beams or columns of the cantilevered steel truss floor deck will affect the steel frame columns and beams during welding and dismantling operations. If bolting is used, it will damage the flanges of the steel frame beams, which will lead to a decrease in load-bearing capacity. If the cantilevered steel truss floor deck is large and involves many side beams, it should be used with caution.

[0006] There is a need to design a device that is low in cost, highly prefabricated, structurally precise and reliable, easy to construct, and capable of efficiently and safely supporting cantilevered steel truss floor slabs. Utility Model Content

[0007] In view of the above-mentioned shortcomings of the existing technology, this utility model provides a cantilever steel truss floor deck support device to solve the problems of the cantilever steel truss floor deck support structure affecting the strength of steel beams and the inconvenience of disassembly and assembly.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A cantilevered steel truss floor slab support device includes:

[0010] The upper connecting plate is welded to the outer side of the upper flange of the steel beam, and its upper end face is flush with the upper end face of the upper flange of the steel beam.

[0011] The lower connector consists of a lower flange and a connecting web fixedly connected above the lower flange. The lower flange is welded to the outer side of the lower flange of the steel beam, and the connecting web is distributed along the web perpendicular to the steel beam.

[0012] The upper support rod consists of a support L-shaped steel with a length distributed along the width of the steel beam and a connecting L-shaped steel fixedly connected to one end of the support L-shaped steel near the steel beam. The connecting L-shaped steel is detachably fixedly connected to the lower part of the upper connecting plate, and the height difference between the upper end face of the connecting L-shaped steel and the upper end face of the support L-shaped steel is equal to the thickness of the upper connecting plate.

[0013] The lower support rod is detachably and fixedly connected at both ends along its length to the connecting web plate and the supporting L-shaped steel away from the steel beam, respectively.

[0014] And a deflection sensor, fixedly connected to the end of the supporting L-shaped steel away from the steel beam;

[0015] Furthermore, mounting holes are provided at corresponding positions between the upper connecting plate and the connecting L-shaped steel, and between both ends of the lower support rod along its length and the connecting web and the end of the supporting L-shaped steel away from the steel beam, respectively.

[0016] Furthermore, the length of the upper connecting plate in the length direction of the steel beam is greater than 2.2 times the maximum width of the connecting L-shaped steel, and the mounting holes on the upper connecting plate are arranged in at least two sets at intervals along the length direction of the steel beam. The connecting web is arranged in at least two sets at intervals along the length direction of the steel beam, and the distance between two adjacent connecting webs is equal to the distance between two adjacent mounting holes on the upper connecting plate.

[0017] Furthermore, the width of the upper connecting plate is no greater than 0.35 times the width of the upper flange of the steel beam.

[0018] Furthermore, stiffening ribs are fixedly connected between the connecting L-shaped steel and the supporting L-shaped steel.

[0019] Furthermore, the upper connecting plate and the connecting L-shaped steel, the connecting web of the lower connecting piece and the lower support rod, and the lower support rod and the supporting L-shaped steel are all fixedly connected by fastening bolts and fastening nuts, and a warning line is provided on the outer end of the fastening bolt.

[0020] Furthermore, the lower end face of the upper connecting plate is provided with an identification groove.

[0021] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0022] 1. The upper support rod is fixedly connected to the upper flange of the steel beam through the upper connecting plate. The setting of the connecting L-shaped steel and the supporting L-shaped steel structure of the upper support rod can ensure that the supporting L-shaped steel is flush with the upper end face of the steel beam, avoiding deformation when installing the steel truss floor deck. Moreover, the upper connecting plate is pre-welded to the outside of the upper flange of the steel beam and the lower connecting piece is pre-welded to the outside of the lower flange of the steel beam. Compared with the connection form in the existing technology where the connection point is set on the web of the steel beam, the drilling is reduced, ensuring the strength and stability of the overall steel beam structure.

[0023] 2. The upper connecting plate length and the lower connecting piece with at least two sets of connecting webs allow for adjustment of the installation positions of the upper and lower support rods, preventing interference with other components;

[0024] 3. Due to the high thermal conductivity of steel itself, steel frame columns and beams are the main thermal bridges in buildings and need to be covered by external cladding structures. However, the installation of external cladding wall panels and curtain walls requires connection points. The upper connecting plate and lower connecting piece of this device can serve as connection points without removal and are tightly connected to the structure.

[0025] 4. The structural safety risk warning is provided through the deflection sensor and the warning line on the fastening bolt. The display is direct and can help construction personnel effectively control the deflection displacement of the device, thereby ensuring the safety of the device. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a left view of the connection structure between the present invention and the steel truss floor deck;

[0029] Figure 3 This is a schematic diagram of the upper support rod structure;

[0030] Figure 4 for Figure 2 Sectional view of AA;

[0031] Figure 5 for Figure 2 Enlarged view of a portion of point B in the middle;

[0032] Figure 6 for Figure 4 Enlarged view of a portion of point C in the middle;

[0033] Figure 7 for Figure 4 A magnified view of a portion of point D in the middle.

[0034] in:

[0035] 1-Steel beam;

[0036] 2-Upper connecting plate, 201-First mounting hole, 202-Identification groove;

[0037] 3-Lower connector, 301-Lower flange, 302-First connecting web, 303-Second connecting web, 304-Second mounting hole;

[0038] 4-Upper support rod, 401-Connecting L-shaped steel, 402-Supporting L-shaped steel, 403-Stiffening rib, 404-Third mounting hole;

[0039] 5-Lower support rod;

[0040] 6-Deflection sensor;

[0041] 7-Fastening bolts;

[0042] 8- Fastening Nut

[0043] 9-Reinforced steel truss floor deck;

[0044] 10 - Warning line;

[0045] 11-Stud pin. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0047] like Figures 1-7 As shown, this utility model provides a cantilevered steel truss floor deck support device. The device is set outside the steel beam 1 and below the steel truss floor deck 9. It includes an upper connecting plate 2, a lower connecting piece 3, an upper support rod 4, a lower support rod 5, and a deflection sensor 6. One end of the upper support rod 4 is fixedly connected to the upper flange of the steel beam 1 through the upper connecting plate 2, and the other end is provided with a deflection sensor 6. The length of the upper support rod 4 is perpendicular to the web of the steel beam 1 and horizontally distributed. One end of the lower support rod 5 is fixedly connected to the lower flange of the steel beam 1 through the lower connecting piece 3, and the other end is fixedly connected to the end of the upper support rod 4 away from the steel beam 1.

[0048] Specifically, such as Figure 1 and Figure 2 As shown, the upper connecting plate 2 has a plate-like structure and is pre-welded to the outer side of the upper flange of the steel beam 1, so as to... Figure 2 For the reference view, the upper connecting plate 2 is provided with two sets of first mounting holes 201 at intervals in the front-back direction (i.e. along the length direction of the steel beam 1). The thickness of the upper connecting plate 2 is equal to the thickness of the upper flange of the steel beam 1, and the upper and lower end faces are flush with the upper and lower end faces of the upper flange of the steel beam 1.

[0049] like Figure 1 and Figure 2 As shown, the lower connecting plate 3 is composed of an integrally formed lower flange 301 and a connecting web plate vertically fixed above the lower flange 301. The lower flange 301 is pre-welded to the outer side of the lower flange of the steel beam 1 and the two are distributed in parallel. The connecting web plate is distributed perpendicular to the web plate of the steel beam 1, and a second mounting hole 304 is provided on the connecting web plate, which is distributed through its thickness direction.

[0050] like Figures 1-3 As shown, the upper support rod 4 is composed of connecting L-shaped steel 401, supporting L-shaped steel 402, and stiffening rib 403, so as to... Figure 2 For the reference view, connecting L-shaped steel 401 is fixedly connected to the left side of supporting L-shaped steel 402. Both are angle steel structures with an L-shaped cross-section. A height difference is provided between the upper side plate of connecting L-shaped steel 401 and the upper side plate of supporting L-shaped steel 402, and the height difference is consistent with the thickness of the upper connecting plate 2. This ensures that after the upper support rod 4 and the upper connecting plate 2 are installed, the upper end face of supporting L-shaped steel 402 is flush with the upper end face of the upper flange of steel beam 1. Stiffening ribs 403 are welded between supporting L-shaped steel 402 and connecting L-shaped steel 401 to improve the overall structural strength, and as shown in the figure. Figure 3 As shown, a third mounting hole 404 is also provided on the upper side plate of the connecting L-shaped steel 401. The third mounting hole 404 is distributed vertically and vertically and corresponds to the position of the first mounting hole 201 on the upper connecting plate 2.

[0051] like Figure 1 and Figure 2 As shown, the lower support rod 5 is also an angle steel structure with an L-shaped cross-section. One end of its length is provided with mounting holes corresponding to the position of the second mounting hole 304, and the other end is also provided with mounting holes corresponding to the position of the end of the supporting L-shaped steel 402 away from the steel beam 1. The mounting holes are not shown in the figure.

[0052] The deflection sensor 6 is detachably fixed to the end of the supporting L-shaped steel 402 away from the steel beam 1 by bolts, and is used to detect the degree of deformation of the upper support rod 4.

[0053] During installation, the first mounting hole 201 of the upper connecting plate 2 and the third mounting hole 404 of the connecting L-shaped steel 401, the left mounting hole of the lower support rod 5 and the second mounting hole 304 of the lower connecting piece 3, and the right mounting hole of the lower support rod 5 and the right mounting hole of the supporting L-shaped steel 402 are all detachably and fixedly connected by fastening bolts 7 and fastening nuts 8. Furthermore, if... Figure 4 and Figure 6 As shown, double fastening nuts 8 are used for fixing to prevent the bolts from loosening due to construction load disturbance. In addition, a warning line 10 is set on the outer end of the fastening bolt 7. When the fastening nut 7 loosens and covers the warning line 10, it reminds the construction personnel to tighten it in time.

[0054] like Figure 7 As shown, a marking groove 202 is also provided on the lower end surface of the upper connecting plate 2 to facilitate the alignment of the upper support rod 4 and the lower support rod 5.

[0055] In addition, in this embodiment, with Figure 2 For the reference view, the length of the upper connecting plate 2 in the front-to-back direction is L, and the width in the left-to-right direction is D, where D ≤ 0.35 times the width of the upper flange of the steel beam 1. The width of the connecting L-shaped steel 401 in the front-to-back direction is L1, and the front-to-back distance between the two sets of first mounting holes 201 is L1, where L > 2.2L1. In the lower connecting member 3, the connecting web includes two sets, namely the first connecting web 302 and the second connecting web 303, which are distributed with a front-to-back distance of L1. With the above settings, the installation positions of the upper support rod 4 and the lower support rod 5 can be adjusted in the front-to-back direction. When the truss reinforcement of the steel truss floor deck 9, the installation junction box piping, and one of the first mounting holes 201 of the upper connecting plate 2 coincide, or other components such as the reinforcing ribs on the steel structure beam cause insufficient installation space, resulting in the installation fastening bolt 7 conflicting with the above-mentioned positions, it can be adjusted to the other set of first mounting holes 201 to avoid interference with other components on the steel truss floor deck 6.

[0056] This device is set in multiple sets at intervals along the length of the steel beam 1. The spacing is adjusted according to the stress calculation. Based on the calculated positioning, the upper connecting plate 2 and the lower connecting piece 3 are prefabricated on the upper and lower flanges of the steel beam 1 to which the cantilever steel truss floor deck belongs. During prefabrication and installation, the marking groove 202 on the lower end face of the upper connecting plate 2 is aligned with the first connecting web 302 of the lower connecting piece 3. Before the cantilever steel truss floor deck 9 is installed, the connecting L-shaped steel 401 of the upper support rod 4 is aligned with the marking groove 202 of the upper connecting plate 2, and the two are connected by fastening bolts 7 and fastening nuts 8. After adjusting the positioning of the upper support rod 4 and the slope is raised, the fastening nuts 8 are pre-tightened. The left and right ends of the lower support rod 5 are connected by... The fastening bolts 7 and fastening nuts 8 are pre-tightened to the first connecting web 302 and the supporting L-shaped steel 402 respectively to form a stable support system. After that, the device is finely adjusted to meet the requirements of support positioning, elevation, and slope. After completion, all fastening nuts 8 are finally tightened, and a second set of fastening nuts 8 is installed on all fastening bolts 7 to ensure that the red warning line 10 is not obscured. One end of the steel truss floor deck 9 is welded to the steel beam 1 using studs 11, and the other end is spot-welded to the cantilevered outer end of the supporting L-shaped steel 402 of the upper support rod 4. After installation, the deflection sensor 6 is bolted to the outermost end of the supporting L-shaped steel 402 of the upper support rod 4.

[0057] During the steel reinforcement binding stage before concrete pouring, the installation and construction stage, during the pouring process, and after the concrete is poured until the concrete strength reaches 100% of the design strength, the deflection of the device is monitored in real time. Before and after concrete pouring, dedicated personnel are arranged to check whether the fastening nut 8 covers the red warning line 10. If it exceeds the limit, the fastening bolt 7 is tightened.

[0058] After the concrete pouring is completed and the concrete strength reaches 100% of the design strength, personnel will be arranged to dismantle the device. First, the deflection sensor 6 will be removed. The connection between the steel truss floor deck 9 and the upper support rod 4 will be de-welded. After removing the fastening bolts 7 on the lower support rod 5, the lower support rod 5 will be dismantled. After removing the fastening bolts 7 on the upper support rod 4, the upper support rod 4 will be dismantled. The upper connecting plate 2 and the lower connecting piece 3 do not need to be removed, as they will serve as connection points for the later external maintenance wall panels and curtain wall embedded parts.

[0059] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cantilevered steel truss floor slab support device, characterized in that, include: The upper connecting plate is welded to the outer side of the upper flange of the steel beam, and its upper end face is flush with the upper end face of the upper flange of the steel beam. The lower connector consists of a lower flange and a connecting web fixedly connected above the lower flange. The lower flange is welded to the outer side of the lower flange of the steel beam, and the connecting web is distributed along the web perpendicular to the steel beam. The upper support rod consists of a support L-shaped steel with a length distributed along the width of the steel beam and a connecting L-shaped steel fixedly connected to one end of the support L-shaped steel near the steel beam. The connecting L-shaped steel is detachably fixedly connected to the lower part of the upper connecting plate, and the height difference between the upper end face of the connecting L-shaped steel and the upper end face of the support L-shaped steel is equal to the thickness of the upper connecting plate. The lower support rod is detachably and fixedly connected at both ends along its length to the connecting web plate and the supporting L-shaped steel away from the steel beam, respectively. And a deflection sensor, fixedly connected to the end of the supporting L-shaped steel away from the steel beam; Furthermore, mounting holes are provided at corresponding positions between the upper connecting plate and the connecting L-shaped steel, and between both ends of the lower support rod along its length and the connecting web and the end of the supporting L-shaped steel away from the steel beam, respectively.

2. The cantilevered steel truss floor slab support device according to claim 1, characterized in that, The length of the upper connecting plate in the length direction of the steel beam is greater than 2.2 times the maximum width of the connecting L-shaped steel, and the mounting holes on the upper connecting plate are arranged in at least two sets at intervals along the length direction of the steel beam. The connecting web is arranged in at least two sets at intervals along the length direction of the steel beam, and the distance between two adjacent connecting webs is equal to the distance between two adjacent mounting holes on the upper connecting plate.

3. The cantilevered steel truss floor slab support device according to claim 1, characterized in that, The width of the upper connecting plate is no greater than 0.35 times the width of the upper flange of the steel beam.

4. The cantilevered steel truss floor slab support device according to claim 1, characterized in that, The connecting L-shaped steel and the supporting L-shaped steel are fixedly connected by stiffening ribs.

5. The cantilevered steel truss floor slab support device according to claim 1, characterized in that, The upper connecting plate and the connecting L-shaped steel, the connecting web of the lower connecting piece and the lower support rod, and the lower support rod and the supporting L-shaped steel are all fixedly connected by fastening bolts and fastening nuts, and a warning line is provided on the outer end of the fastening bolt.

6. The cantilevered steel truss floor slab support device according to claim 1, characterized in that, The lower end face of the upper connecting plate is provided with an identification groove.

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