A connection joint of a truss support frame and a steel beam and a construction method

Abstract

The application discloses a kind of truss support frame and steel beam connecting node and construction method, including steel beam, truss support frame and end connecting piece, end connecting piece is fixedly connected with the web of steel beam, the end of upper chord of truss support frame is connected with end connecting piece, end connecting piece includes end plate, pressure plate, side plate, pressure piece and adjusting piece, pressure plate and side plate are vertically arranged, cross-sectional shape is '' L '' or '' T '' shape, pressure piece is arranged on pressure plate, pressure piece and pressure plate are provided with through hole that passes through pressure piece and pressure plate from top to bottom;Adjusting piece includes adjusting bolt and supporting plate, the end of upper chord of truss support frame is placed on supporting plate, and the height of supporting plate can be adjusted in vertical direction by screwing adjusting bolt, so as to drive the vertical height of the end of upper chord of truss support frame to be adjusted.The application has simple structure, and installation operation is simple, and the stress model of structure is in pressure state in the whole process, so as to reduce the possibility of safety accident.

Description

A connection node and construction method between a truss-type support frame and a steel beam Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a connection node between a truss-type support frame and a steel beam, and a construction method thereof. Background Technology

[0002] In the prior art, a truss-type formwork support system has emerged for the manufacture of building floor slabs. This system connects steel beams to truss chords, forming a formwork support system that can be quickly assembled and disassembled. Furthermore, the steel beams serve as temporary vertical load-bearing components, freeing the floor slab pouring from the constraints of the curing time of the underlying floor slab. Chinese invention patent CN106320699A discloses a method for quickly assembling and disassembling a truss-type formwork support system. It uses combined end plates and steel connectors to fix the truss chords to the steel beams, forming a quick-release structure that replaces the traditional steel pipe support system. In the disclosed method, the steel connectors are connected to the combined end plates via quick-release bolts. This connection structure has the following drawbacks: 1. The quick-release bolts are under tension after installation. If the bolts are not tightened properly, the entire truss chord may fall and collapse, causing a safety accident; 2. The installation of this connection structure is not convenient. When installing the truss chords, the quick-release bolts need to be tightened while the truss is suspended, making the operation difficult. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention proposes a simple, easy-to-install, and highly safe truss-type support frame and steel beam connection node and its construction method, which makes the overall stress mode of the end connection structure under pressure, reducing the possibility of safety accidents.

[0004] This invention is achieved through the following technical solutions:

[0005] A connection node between a truss-type support frame and a steel beam includes a steel beam, a truss-type support frame, and an end connector. The end connector is fixedly connected to the web of the steel beam. The truss-type support frame includes an upper chord, a lower chord, and web members. The end of the upper chord of the truss-type support frame is connected to the end connector. The end connector includes an end plate, a pressure plate, a side plate, a pressure-bearing component, and an adjusting component. The end plate is provided with bolt holes for connection to the web of the steel beam. The pressure plate and the side plate are arranged vertically, and their cross-sectional shapes are "L" or "T". The pressure plate and the side plate are both perpendicular to the end plate and fixedly connected. After installation, the pressure plate remains parallel to the ground.

[0006] The pressure-bearing component is disposed on the pressure-bearing plate, and the pressure-bearing component and the pressure-bearing plate are provided with through holes that pass through the pressure-bearing component and the pressure-bearing plate vertically;

[0007] The adjusting component includes an adjusting bolt and a support plate. The support plate is parallel to the pressure plate. The through hole is provided with an internal thread corresponding to the adjusting bolt. The adjusting bolt passes through the through hole from bottom to top and is threadedly connected to the support plate.

[0008] The end plate is connected to the web of the steel beam by end plate bolts. The end of the upper chord of the truss support frame is placed on the support plate. Tightening the adjusting bolt can adjust the height of the support plate vertically, thereby adjusting the vertical height of the end of the upper chord of the truss support frame.

[0009] In a further improvement to the present invention, the number of bolt holes is 2 to 4, and the number of end plate bolts is the same as the number of bolt holes.

[0010] A further improvement to the present invention includes a stabilizing component, which comprises a channel plate, fastening bolts, and fixing nuts. The channel plate is shaped like a "Π". The fixing nuts are fixed to the outside of one side vertical plate of the channel plate. The fastening bolts are threadedly connected to the fixing nuts and pass through the channel plate from the outside. After the end of the upper chord of the truss support frame is placed on the support plate and the vertical height adjustment is completed, the stabilizing component is installed. The channel plate fixes the upper chord and the side plate in the channel. Tightening the fastening bolts causes them to pass through the channel, thereby squeezing and fixing the upper chord and the side plate.

[0011] In a further improvement of the present invention, the tray is circular, square, or rectangular, and a countersunk hole is provided in the center of the tray. The countersunk hole has an internal thread corresponding to the adjusting bolt. The adjusting bolt passes through the through hole from bottom to top and is then inserted into the countersunk hole of the tray.

[0012] In a further improvement to the present invention, the upper chord section of the truss-type support frame is square or rectangular.

[0013] In a further improvement of the present invention, the web members of the truss-type support frame are square or circular, and the cross-section of the lower chord is square, rectangular, or circular.

[0014] The present invention also provides a construction method for using the above-mentioned truss-type support frame and steel beam connection node, comprising the following steps:

[0015] S1. Machining mounting holes on the web of the steel beam that correspond to the bolt holes on the end plate;

[0016] S2. Install the end connector using end plate bolts, so that the end plate is tightly fixed against the web of the steel beam;

[0017] S3. Screw the adjusting bolt into the through hole and let its end pass through the pressure plate and the pressure member, and install the support plate on the end of the adjusting bolt;

[0018] S4. Place the end of the upper chord of the truss support frame on the support plate and adjust the vertical height of the end of the upper chord of the truss support frame by turning the adjusting bolt;

[0019] S5. The upper chord of the truss support frame and the side plate of the end connector are fixed in the groove by the groove plate of the stabilizer, and the upper chord and the side plate are squeezed and fixed by tightening the fastening bolts.

[0020] S6. Lay square timber and formwork on the truss support frame, arrange floor slab reinforcement on the formwork, and pour floor slab concrete.

[0021] S7. Once the concrete strength of the floor slab meets the requirements, tighten the fastening bolts to loosen the stabilizer, and use the gap between the truss support frame and the formwork to remove the stabilizer for reuse next time.

[0022] S8. Tighten the adjusting bolt to lower the support plate. The truss support frame moves down under its own weight, causing the square timber, formwork and floor slab concrete to separate.

[0023] S9. Remove the truss support frame, timber and formwork to facilitate reuse next time;

[0024] S10. Remove the end connectors on the web of the steel beam to facilitate reuse next time.

[0025] Compared with existing technologies, the connection node between the truss-type support frame and the steel beam proposed in this invention features a support plate that supports the upper chord of the truss-type support frame, ensuring reliable force distribution. The support plate transmits the pressure it bears to the bearing components and bearing plates through adjusting bolts. The entire force model is in the form of pressure, ensuring smooth pressure transmission even if installation is not in place, thus reducing the probability of safety accidents. Furthermore, the ends of the truss-type support frame are placed on the support plate, and the vertical height is adjusted using adjusting bolts, making the operation simple and efficient. During the dismantling of the truss-type support frame, the truss-type support frame will not immediately fall after the adjusting bolts are loosened, resulting in a high safety factor. Attached Figure Description

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

[0027] Figure 1 is an overall structural diagram of the connection node between the truss-type support frame and the steel beam of the present invention.

[0028] Figure 2 is a schematic diagram of the end connector of the connection node between the truss support frame and the steel beam of the present invention;

[0029] Figure 3 is an exploded view of the connection node between the truss-type support frame and the steel beam of the present invention;

[0030] Figure 4 is a schematic diagram of the stabilizing component structure of the connection node between the truss support frame and the steel beam of the present invention;

[0031] Figure 5 is a schematic diagram of the installation of the adjusting component at the connection node between the truss support frame and the steel beam of the present invention;

[0032] Figure 6 is a schematic diagram of the installation of the connection node between the truss support frame and the steel beam of the present invention;

[0033] Figure 7 is a cross-sectional view of the connection node between the truss support frame and the steel beam of the present invention.

[0034] Figure 8 is a schematic diagram of the support plate structure of the connection node between the truss support frame and the steel beam of the present invention. Detailed Implementation

[0035] The technical solutions of various embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0037] A connection node between a truss-type support frame and a steel beam includes a steel beam 1, a truss-type support frame 2, and an end connector 3. The end connector 3 is fixedly connected to the web of the steel beam 1. The truss-type support frame 2 includes an upper chord 4, a lower chord 18, and a web member 19. The end of the upper chord 4 of the truss-type support frame 2 is connected to the end connector 3. The end connector 3 includes an end plate 5, a pressure plate 6, a side plate 7, a pressure-bearing component 8, and an adjusting component 9. The end plate 5 is provided with three bolt holes 20 that are connected to the web of the steel beam 1. The pressure plate 6 and the side plate 7 are arranged vertically and have an "L" shaped cross-section. The pressure plate 6 and the side plate 7 are both perpendicular to the end plate 5 and fixedly connected. After installation, the pressure plate 6 remains parallel to the ground. In some other embodiments, the cross-section after the pressure plate 6 and the side plate 7 are connected can also be "T" shaped.

[0038] The pressure-bearing component 8 is disposed on the pressure-bearing plate 6. The pressure-bearing component 8 and the pressure-bearing plate 6 are provided with through holes 10 that pass through the pressure-bearing component 8 and the pressure-bearing plate 6 from top to bottom. In this embodiment, the pressure-bearing component 8 is designed as a hexagonal nut-shaped structure. In other embodiments, the pressure-bearing component 8 can also be designed as a cylinder or a square.

[0039] Adjusting component 9 includes adjusting bolt 11 and support plate 12. Support plate 12 is parallel to pressure plate 6. Through hole 10 is provided with internal thread corresponding to adjusting bolt 11. Adjusting bolt 11 passes through through hole 10 from bottom to top and is threadedly connected to support plate 12.

[0040] The end plate 5 is connected to the web of the steel beam 1 by three end plate bolts 21. The end of the upper chord 4 of the truss support frame 2 is placed on the support plate 12. Tightening the adjusting bolt 11 can adjust the height of the support plate 12 vertically, thereby adjusting the vertical height of the end of the upper chord 4 of the truss support frame 2.

[0041] In this embodiment, a stabilizing component 13 is also included. The stabilizing component 13 includes a channel plate 14, a fastening bolt 15, and a fixing nut 16. The channel plate 14 is in the shape of a "Π". The fixing nut 16 is welded to the outside of one side vertical plate of the channel plate 14. The fastening bolt 15 is threadedly connected to the fixing nut 16 and passes through the outside of the channel plate 14 into the groove of the channel plate 14. After the end of the upper chord 4 of the truss support frame 2 is placed on the support plate 12 and the vertical height adjustment is completed, the stabilizing component 13 is installed. The channel plate 14 fixes the upper chord 4 and the side plate 7 in the groove. Tightening the fastening bolt 15 allows it to pass through the groove and compresses and fixes the upper chord 4 and the side plate 7.

[0042] In order to ensure that the truss support frame 2 can be placed more stably on the support plate 12, in this embodiment, the upper chord 4 of the truss support frame 2 has a square cross section, the lower chord has a square cross section, and the web members have a square cross section.

[0043] In this embodiment, the support plate 12 is circular, and a countersunk hole 17 is provided in the center of the support plate 12. The countersunk hole 17 has an internal thread corresponding to the adjusting bolt 11. The adjusting bolt 11 passes through the through hole 10 from bottom to top and is then inserted into the countersunk hole 17 of the support plate 12. In other embodiments, the support plate 12 may also be designed as square as needed.

[0044] The construction method for the connection node between the truss support frame 2 and the steel beam 1 in this embodiment includes the following steps:

[0045] S1. Machining mounting holes on the web of steel beam 1 that correspond to the bolt holes on end plate 5;

[0046] S2. Use end plate bolts 21 to install end connectors 3, so that end plate 5 is fixed tightly against the web of steel beam 1;

[0047] S3. Screw the adjusting bolt 11 into the through hole 10 and let its end pass through the pressure plate 6 and the pressure member 8, and install the support plate 12 on the end of the adjusting bolt 11.

[0048] S4. Place the end of the upper chord 4 of the truss support frame 2 on the support plate 12 and adjust the vertical height of the end of the upper chord 4 of the truss support frame 2 by turning the adjusting bolt 11.

[0049] S5. The upper chord of the truss support frame 2 and the side plate 7 of the end connector 3 are fixed in the groove by the groove plate 14 of the stabilizer 13, and the upper chord 4 and the side plate 7 are squeezed and fixed by tightening the fastening bolts 15.

[0050] S6. Lay square timber and formwork on the truss support frame 2, arrange floor slab reinforcement on the formwork, and pour floor slab concrete.

[0051] S7. Once the concrete strength of the floor slab meets the requirements, tighten the fastening bolts 15 to loosen the stabilizer 13, and remove the stabilizer 13 using the gap between the truss support frame 2 and the formwork for easy reuse next time.

[0052] S8. Tighten the adjusting bolt 11 to lower the support plate 12. The truss support frame 2 moves down under its own weight, causing the square timber, formwork and floor slab concrete to separate.

[0053] S9. Remove the truss support frame 2, square timber and formwork for future reuse;

[0054] S10. Remove the end connector 3 from the web of steel beam 1 for future reuse.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A connection node between a truss-type support frame and a steel beam, comprising a steel beam, a truss-type support frame, and an end connector, wherein the end connector is fixedly connected to the web of the steel beam, the truss-type support frame includes an upper chord, a lower chord, and web members, and the end of the upper chord of the truss-type support frame is connected to the end connector, characterized in that: The end connector includes an end plate, a pressure plate, a side plate, a pressure-bearing component, and an adjusting component. The end plate has bolt holes for connection to the web of the steel beam. The pressure plate and the side plate are arranged perpendicularly, with an "L" or "T" shaped cross-section. Both the pressure plate and the side plate are perpendicular to and fixedly connected to the end plate. After installation, the pressure plate remains parallel to the ground. The pressure-bearing component is mounted on the pressure plate, and both the pressure-bearing component and the pressure plate have through holes running vertically through them. The adjusting component includes an adjusting bolt and a support plate. The support plate is parallel to the pressure plate, and the through hole has an internal thread corresponding to the adjusting bolt. The adjusting bolt passes through the through hole from bottom to top and is threadedly connected to the support plate. The end plate and the steel beam... The web is connected by end plate bolts. The end of the upper chord of the truss-type support frame is placed on the support plate. Tightening the adjusting bolt can vertically adjust the height of the support plate, thereby adjusting the vertical height of the end of the upper chord of the truss-type support frame. It also includes a stabilizing component, which includes a channel plate, fastening bolts, and fixing nuts. The channel plate is "Π" shaped. The fixing nuts are fixed to the outside of one side vertical plate of the channel plate. The fastening bolts are threaded to the fixing nuts and pass through the channel plate from the outside. After the end of the upper chord of the truss-type support frame is placed on the support plate and the vertical height is adjusted, the stabilizing component is installed. The channel plate fixes the upper chord and the side plate in the channel. Tightening the fastening bolts allows them to pass through the channel and compress and fix the upper chord and the side plate.

2. The connection node between the truss-type support frame and the steel beam according to claim 1, characterized in that: The number of bolt holes is 2 to 4, and the number of end plate bolts is the same as the number of bolt holes.

3. The connection node between the truss-type support frame and the steel beam according to claim 2, characterized in that: The tray is round or rectangular, and a countersunk hole is provided in the center of the tray. The countersunk hole has an internal thread corresponding to the adjusting bolt. The adjusting bolt passes through the through hole from bottom to top and is then inserted into the countersunk hole of the tray.

4. The connection node between the truss-type support frame and the steel beam according to claim 3, characterized in that: The upper chord of the truss-type support frame has a rectangular cross-section.

5. The connection node between the truss-type support frame and the steel beam according to claim 4, characterized in that: The web members of the truss-type support frame are square or circular, and the lower chord has a rectangular or circular cross-section.

6. A construction method for the connection node between the truss-type support frame and the steel beam according to claim 5, characterized in that, Includes the following steps: S1. Machining mounting holes on the web of the steel beam corresponding to the bolt holes on the end plate; S2. Installing the end connector using the end plate bolts, fixing the end plate tightly against the web of the steel beam; S3. Screwing the adjusting bolt into the through hole and having its end pass through the bearing plate and the bearing member, installing the support plate on the end of the adjusting bolt; S4. Placing the end of the upper chord of the truss support frame on the support plate and adjusting the vertical height of the upper chord end of the truss support frame by turning the adjusting bolt; S5. Connecting the upper chord of the truss support frame and the end of the upper chord of the truss support frame to the support plate using the grooved plate of the stabilizer. The side plate of the end connector is fixed in the groove, and the upper chord and the side plate are squeezed and fixed by tightening the fastening bolts; S6, square timber and template are laid on the truss support frame, floor slab reinforcement is arranged on the template, and floor slab concrete is poured; S7, when the floor slab concrete strength meets the requirements, the fastening bolts are tightened to loosen the stabilizer, and the stabilizer is removed using the gap between the truss support frame and the template for easy reuse; S8, the adjusting bolts are tightened to lower the support plate, and the truss support frame moves down under its own weight to separate the square timber, template and floor slab concrete; S9. Remove the truss support frame, square timber, and formwork for future reuse; S10. Remove the end connectors on the web of the steel beam for future reuse.

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