A truss type formwork system for steel structure cast-in-situ floor

Abstract

A truss-type formwork system for cast-in-place steel structure floor slabs includes a main structural I-beam, a support beam assembly, and a mounting system. The mounting system comprises: a plate assembly located at the flange of the main structural I-beam, including a fixed plate I and a fixed plate II disposed opposite to each other; a hanger rod disposed on the side end of the web of the main structural I-beam and used to connect the fixed plate I and the fixed plate II; an adjusting nut disposed at the connection between the fixed plate I and the hanger rod, and between the fixed plate II and the hanger rod; an abutment plate disposed on the hanger rod and located on the side end of the flange of the main structural I-beam; and a support beam disposed on the hanger rod and used to install the support beam assembly. This invention, by setting up a mounting system, is applicable to both main structural steel beams with a flange width greater than 200mm and those with a flange width less than or equal to 200mm. Furthermore, it exhibits high structural strength, good stability, and advantages such as simple installation, flexible application, and high turnover rate.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, and specifically relates to a truss-type formwork system for cast-in-place steel structure floor slabs. Background Technology

[0002] Steel truss floor decking is a composite formwork formed by welding upper and lower longitudinal steel bars and bent small-diameter steel bars into a steel truss, and then connecting the steel truss with the bottom formwork.

[0003] Steel truss floor decking can be standardized in factories, ensuring consistent reinforcement spacing and concrete cover thickness. This improves construction quality, significantly reduces on-site reinforcement binding, accelerates construction, and enhances safety. It offers advantages such as easy installation, fast construction, and excellent quality control. Therefore, with the continuous development of steel structure building technology, prefabricated steel truss floor decking is being used more and more widely.

[0004] Application publication number CN113293990A discloses a construction method for a reinforced truss floor deck support structure and a cast-in-place steel floor slab, including: a main structural steel beam, in the form of an I-beam, connected to the main structural steel columns; a support beam assembly, composed of sequentially inserted end truss beam I, intermediate truss beam, and end truss beam II, used to support the reinforced truss floor deck; and a steel beam connecting assembly, disposed below the support beam assembly, used to detachably connect the support beam assembly to the main structural steel beam. The steel beam connecting assembly includes: support plate I, support plate II, a nut, lug plate I, and lug plate II. The support plate and lug plate are movably connected, and the position of the lug plate is adjusted and fixed by adjusting bolts and adjusting nuts, thereby locking the main structural steel beam.

[0005] In actual construction scenarios, different sizes of main structural steel beams are selected according to the needs of the scenario. For example, for main structural steel beams with a flange width greater than 200mm, the aforementioned clamping structure or similar structure can be used to fix the connecting components. However, if the flange width of the main steel beam structure is less than or equal to 200mm, the locking depth of the clamping structure is also less than 200mm, resulting in insufficient structural strength and load-bearing capacity of the connecting components. Installing support beam components on it poses certain risks, thus limiting its application scenarios. Summary of the Invention

[0006] To address the aforementioned problems, the purpose of this invention is to provide a truss-type formwork support system for cast-in-place steel structure floor slabs. By setting up an installation base system consisting of slab components, hangers, adjusting nuts, abutment plates, and support beams, it is suitable for main structural steel beams with a flange width greater than 200mm, and can also be installed on main structural steel beams with a flange width less than or equal to 200mm. Moreover, it has high structural strength, good stability, and the advantages of simple installation, flexible application, and high turnover rate.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows:

[0008] A truss-type formwork system for cast-in-place steel structure floor slabs includes a main structural I-beam and a support beam assembly, and a mounting system for detachably connecting the support beam assembly to the main structural I-beam. The mounting system includes:

[0009] The plate assembly is located at the flange of the I-beam of the main structure, and the plate assembly includes a fixed plate I and a fixed plate II arranged opposite to each other;

[0010] A hanger rod is installed on the side end of the web of the main structure I-beam and is used to connect the fixing plate I and the fixing plate II.

[0011] An adjusting nut is provided at the connection between the fixed plate I and the hanger rod, and between the fixed plate II and the hanger rod;

[0012] A contact plate is mounted on the hanger rod and located at the side end of the flange of the I-beam of the main structure.

[0013] A support beam is mounted on the hanger and is used to install the support beam assembly.

[0014] As a further preferred embodiment of the present invention, the fixing plate I is disposed on the outer side of the flange of the main structure I-beam and its length is greater than the length of the flange; the fixing plate II is disposed on the side end of the web of the main structure I-beam and is attached to the surface of the flange.

[0015] As a further preferred embodiment of the present invention, both the fixing plate I and the fixing plate II are provided with side openings for inserting the boom, and the diameter of the adjusting nut is greater than the width of the side opening.

[0016] As a further preferred embodiment of the present invention, the end of the fixing plate II away from the flange of the main structure I-beam is provided with an adjusting column assembly connected to the fixing plate I.

[0017] As a further preferred embodiment of the present invention, the adjusting column assembly includes a connecting cylinder disposed on the fixed plate II, a connecting rod disposed on the fixed plate I and inserted into the connecting cylinder, and a spring disposed in the connecting cylinder and connected to the connecting rod.

[0018] As a further preferred embodiment of the present invention, the mounting base system further includes: an internally threaded cylinder disposed on the side of the fixed plate II near the web of the main structure I-beam and rotatably connected to the fixed plate II; a top support rod threadedly connected to the internally threaded cylinder and acting on the inner surface of the flange of the main structure I-beam; a fixing ring disposed on the top support rod; an adjusting ring disposed on the hanger rod; and a crossbar for connecting the fixing ring and the adjusting ring.

[0019] As a further preferred embodiment of the present invention, the adjusting ring includes a semi-ring body I and a semi-ring body II respectively connected to the crossbar, two screw holes respectively provided in the semi-ring body I and the semi-ring body II, and a fixing bolt for connecting the semi-ring body I and the semi-ring body II.

[0020] As a further preferred embodiment of the present invention, the end of the top support rod is provided with a wear-resistant layer.

[0021] As a further preferred embodiment of the present invention, the abutment plate is provided with a clamping layer near the side end of the flange of the I-beam of the main structure.

[0022] As a further preferred embodiment of the present invention, a buckle plate for connecting to the flange of the I-beam of the main structure is provided on one side of the fixing plate I.

[0023] In summary, the present invention has the following beneficial effects:

[0024] This invention takes into account construction scenarios where the main structural steel of the I-beam is less than or equal to 200mm. The mounting system adopted constitutes a system structure that combines a hanging plate structure and a clamping plate structure. Furthermore, an adjustable abutment plate is set at the clamping plate structure, which can not only enhance the stability of the structural connection, but also increase the contact area with the flange, avoiding the problem of limited installation strength due to insufficient flange width. At the same time, since the abutment plate is adjustable, the installation requirements for flange width are reduced, which greatly increases the applicable scenarios of this device. Compared with the existing structure, the flexibility and stability of this device are significantly improved.

[0025] This invention takes into account construction scenarios where the main structural steel of the I-beam is greater than 200mm. The mounting system further incorporates a detachable top support structure, which increases the connection strength between the structure and the wing plate, enhances the overall integrity and stability of the system, and expands the applicability of the device. It is also simple to construct and has a high turnover rate. Attached Figure Description

[0026] Appendix Figure 1 This is a schematic diagram of the installation structure of the present invention.

[0027] Appendix Figure 2 This is a partial structural schematic diagram of the mounting base system of the present invention.

[0028] Appendix Figure 3 This is a schematic diagram of one installation mode of the mounting base system of the present invention.

[0029] Appendix Figure 4 This is a schematic diagram of the structure of the adjusting column assembly of the present invention.

[0030] Appendix Figure 5 This is a schematic diagram of one installation mode of the mounting base system of the present invention.

[0031] Appendix Figure 6 This is a schematic diagram of one installation mode of the mounting base system of the present invention.

[0032] Appendix Figure 7 This is a partial structural schematic diagram of the mounting base system of the present invention.

[0033] Appendix Figure 8 This is a schematic diagram of part A of the mounting system of the present invention.

[0034] Appendix Figure 9 This is a schematic diagram of part B of the mounting system of the present invention.

[0035] Appendix Figure 10 This is a schematic diagram of the structure of the adjusting ring of the present invention.

[0036] Appendix Figure 11 This is a schematic diagram of one installation mode of the mounting base system of the present invention.

[0037] Appendix Figure 12 This is a schematic diagram of one installation mode of the mounting base system of the present invention.

[0038] Figure description: Main structure: I-beam 11, support beam assembly 12, fixing plate I 201, buckle plate 201a, fixing plate II 202, limiting plate 202a, rotating rod 202b, connecting hole 202c, ball bearing 202d, hanging rod 203, adjusting nut 204, abutment plate 205, clamping layer 205a, support beam 206, side opening 207, adjusting column assembly 208, connecting cylinder 208a, connecting rod 208b, spring 208c, internal threaded cylinder 209, top support rod 210, wear-resistant layer 210a, fixing ring 211, adjusting ring 212, semi-ring I 212a, semi-ring II 212b, screw hole 212c, fixing bolt 212d, crossbar 213. Detailed Implementation

[0039] Example 1

[0040] This embodiment provides a truss-type formwork system for cast-in-place steel structure floor slabs, as shown in the attached figure. Figure 1As shown, it includes a main structural I-beam 11 and a support beam assembly 12, and a mounting system for detachably connecting the support beam assembly 12 to the main structural I-beam 11.

[0041] In this embodiment, as shown in the appendix Figure 2 and attached Figure 3 As shown, the mounting system includes:

[0042] The plate assembly is located at the flange of the I-beam 11 of the main structure. The plate assembly includes a fixing plate I201 and a fixing plate II202 that are arranged opposite to each other.

[0043] The hanger 203 is installed on the side end of the web of the main structure I-beam 11 and is used to connect the fixing plate I201 and the fixing plate II202.

[0044] Adjusting nut 204 is provided at the connection between the fixed plate I201 and the hanger 203, and between the fixed plate II202 and the hanger 203;

[0045] Abutment plate 205 is provided on the hanger rod 203 and located at the side end of the flange of the main structure I-beam 11, and a clamping layer 205a is provided on the abutment plate 205 near the side end of the flange of the main structure I-beam 11.

[0046] A support beam 206 is mounted on the hanger 203 and is used to install the support beam assembly 12.

[0047] Furthermore, in this embodiment, both the fixing plate I201 and the fixing plate II202 are provided with side openings 207 for inserting the hanger rod 203, and the diameter of the adjusting nut 204 is larger than the width of the side opening 207. Additionally, the end of the fixing plate II202 away from the flange of the main structure I-beam 11 is provided with an adjusting column assembly 208 connected to the fixing plate I201. The adjusting column assemblies 208 are distributed at the corners of the fixing plates I201 and II202 to avoid obstructing the installation of the hanger rod 203, as shown in the attached figure. Figure 4 As shown, the specific structure of the adjusting column assembly 208 includes a connecting cylinder 208a disposed on the fixed plate I202, a connecting rod 208b disposed on the fixed plate I201 and inserted into the connecting cylinder 208a, and a spring 208c disposed in the connecting cylinder 208a and connected to the connecting rod 208b.

[0048] In this embodiment, the fixing plate I201 is disposed on the outer side of the flange of the main structural I-beam 11 and its length is greater than that of the flange. With the web of the main structural I-beam 11 as the axis of symmetry, one end of the fixing plate I201 is opposite to the fixing plate II202, and the other end can also be provided with a corresponding fixing plate II202, or have a buckle plate 201a for connecting to the flange of the main structural I-beam 11. The fixing plate II202 is disposed on one end of the web of the main structural I-beam 11 and is attached to the surface of the flange. The hanger rod 203 is a threaded rod, which is adapted to the size of the side opening 207 and can freely enter and exit the side opening 207. The adjusting nuts 204 are used to install the hanger rod 203, and are distributed not only at the connection points between the hanger rod 203 and the fixing plates I201 and II202, but also on the upper and lower sides of the support beam 206 to fix the support beam 206. The function of the adjusting column assembly 208 is to strengthen the connection between the fixing plate I201 and the fixing plate II202. Its adjustable buffer structure can adapt to wing plates of different thicknesses, reduce wear at the connection, and improve the applicability and lifespan of the device.

[0049] This embodiment of the mounting system offers multiple installation methods suitable for various installation scenarios: Firstly, when the width of the 11th flange of the main structure's I-beam is less than or equal to 200mm, as shown in the attached... Figure 3 As shown, the fixing plate I201 is set on the upper part of the flange of the I-beam 11 of the main structure, with one end being a snap-on plate 201a that is snapped into the flange, and the other end being connected to the fixing plate II202 through the adjusting column assembly 208. The side openings 207 of the fixing plates I201 and II202 are aligned, and the hanger 203 is inserted until the abutment plate 205 abuts and clamps against the side end of the flange. Then, the hanger 203 is fixed by the adjusting nut 204, and the support beam 206 is fixed simultaneously, completing the installation of the entire mounting system. The second method, also when the flange width of the I-beam 11 of the main structure is less than or equal to 200mm, is as shown in the attached... Figure 5 As shown, the difference from the first type is that both ends of the fixing plate I201 are connected to the fixing plate II202, that is, one fixing plate I corresponds to two fixing plates II, so that the support beam 206 can be installed at both ends of the mounting base, thereby achieving the purpose of installing the support beam assembly 12 on both sides. The third type, in the extreme case where the flange width of the main structure I-beam 11 is less than or equal to 200mm or even smaller, in order to ensure the strength of the mounting base system, as shown in the attached... Figure 6As shown, the difference from the second type is that not only are fixing plates I and II installed on the upper wing plate, but fixing plates I and II are also installed on the lower wing plate. Furthermore, the same hanger 203 is used to fix the upper and lower wing plates on the same side, thereby connecting all the fixing plates on the same side to form a whole, so as to improve the structural strength and stability.

[0050] Compared with the prior art, the mounting system provided in this embodiment has the advantage that the structure consists of a fixed plate I and a fixed plate II forming a system that combines a hanging plate structure and a clamping plate structure. Furthermore, an adjustable abutment plate is provided at the clamping plate structure, which can not only enhance the connection stability of the fixed plate I and the fixed plate II, but also increase the contact area with the wing plate, avoiding the problem of limited installation strength due to insufficient wing width. At the same time, since the abutment plate is adjustable, the installation requirements for wing width are reduced, greatly increasing the applicable scenarios of this device. Compared with the existing structure, the flexibility and stability of this device are significantly improved.

[0051] Example 2

[0052] The difference between this embodiment and embodiment 1 is that, as shown in the appendix... Figure 7 - Appendix Figure 9 As shown, the mounting system further includes: an internally threaded cylinder 209 disposed on the side of the fixed plate II 202 near the web of the main structure I-beam 11 and rotatably connected to the fixed plate II 202; a top support rod 210 threadedly connected to the internally threaded cylinder 209 and acting on the inner surface of the flange of the main structure I-beam 11; a fixing ring 211 disposed on the top support rod 210; an adjusting ring 212 disposed on the hanger rod 203; and a crossbar 213 for connecting the fixing ring 211 and the adjusting ring 212.

[0053] The top support rod 210 has a wear-resistant layer 210a at its end. The adjusting ring 212 includes a semi-ring body I212a and a semi-ring body II212b connected to the crossbar 213, two screw holes 212c respectively provided in the semi-ring body I212a and the semi-ring body II212b, and a fixing bolt 212d for connecting the semi-ring body I212a and the semi-ring body II212b.

[0054] There are many ways in which the internal threaded cylinder 209 can be rotatably connected to the fixed plate II 202, and there is no limitation. In this embodiment, a specific structure is given as an example, including: a limiting plate 202a disposed on the side of the internal threaded cylinder 209 near the fixed plate II 202, a rotating rod 202b disposed on the limiting plate 202a, a connecting hole 202c disposed on the fixed plate II 202, and a ball bearing 202d disposed on the rotating rod 202b.

[0055] In this embodiment, the purpose of the structural arrangement of the internally threaded cylinder 209 and the top support rod 210 is to enhance the applicability of the mounting system. This mainly includes the following usage scenarios: First, when the flange width of the main structure I-beam 11 is greater than 200mm, as shown in the attached... Figure 7 As shown, the fixing plate I201 is set at the lower end of the flange of the main structure I-beam 11, with one end being a snap-on plate 201a that is snapped into the flange, and the other end being connected to the fixing plate II202 via an adjusting column assembly 208. The side openings 207 of fixing plate I201 and fixing plate II202 are aligned, and the hanger 203 is inserted until the abutment plate 205 abuts and clamps against the side end of the flange. Then, the hanger 203 is fixed with the adjusting nut 204, and the support beam 206 is fixed. Simultaneously, an internally threaded cylinder 209 is installed near the web of fixing plate II202. The internally threaded cylinder 209 is then rotated to adjust the connection position between the top support rod 210 and the internally threaded cylinder 209 so that the top support rod 210 abuts against the lower surface of the upper flange, completing the installation. Secondly, when the flange width of the main structure I-beam 11 is greater than 200mm, as shown in the attached... Figure 11 As shown, the difference from the first type is that both ends of the fixing plate I201 are connected to the fixing plate II202, that is, one fixing plate I corresponds to two fixing plates II, so that the support beam 206 can be installed at both ends of the mounting base, thereby achieving the purpose of installing the support beam assembly 12 on both sides. At the same time, both fixing plates II are provided with a top support structure composed of an internally threaded cylinder 209 and a top support rod 210 to strengthen the connection strength with the main structure I-beam 11 and improve the structural strength. The third type is when the flange width of the main structure I-beam 11 is greater than 200mm, as shown in the attached... Figure 12 As shown, the difference from the second type is that not only are fixing plates I and II installed on the upper wing plate, but fixing plates I and II are also installed on the lower wing plate. Furthermore, the same hanger 203 is used to fix the upper and lower wing plates on the same side, and a combination of an internal threaded cylinder 209 and a top support rod 210 is used for reinforcement, thereby connecting all the fixing plates on the same side to form a whole, so as to improve the structural strength and stability.

[0056] The advantage of this device compared to existing technologies is that it can be flexibly selected and assembled into a mounting system according to different installation scenarios. All major components in the entire mounting system are detachable, and it has the advantages of stable structure, flexible installation, and wide applicability.

[0057] In actual construction, firstly, a suitable mounting system is selected based on the flange width of the main structural I-beam 11 and the length and weight of the main truss (i.e., support beam assembly 12). After the mounting system is installed on the main structural I-beam 11, suitable truss units (three sizes: L=100mm, L=300mm, and L=1000mm, assembled with bolts) are selected and combined according to the length of the main truss. The two ends of the assembled main truss are directly installed on the trailing beams of the mounting system. Secondly, timber and formwork are laid on the main truss, and then reinforcing steel is tied. Finally, the floor slab concrete is poured. After curing, the main truss and mounting system can be dismantled for reuse.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A truss-type formwork system for cast-in-place steel structure floor slabs, comprising a main structural I-beam (11) and a support beam assembly (12), and a mounting system for detachably connecting the support beam assembly (12) to the main structural I-beam (11), characterized in that, The mounting system includes: The plate assembly is located at the flange of the I-beam (11) of the main structure. The plate assembly includes a fixing plate I (201) and a fixing plate II (202). The fixing plate I (201) is located on the upper outer side of the wing plate of the main structure I-beam (11) and its length is greater than the length of the wing plate. One side of the fixing plate I (201) is opposite to the fixing plate II (202), and the other side is provided with a buckle plate (201a) for engaging with the wing plate of the main structure I-beam (11). The hanger (203) is installed on the side end of the web of the main structure I-beam (11) and is used to connect the fixing plate I (201) and the fixing plate II (202). Adjusting nut (204) is provided at the connection between the fixed plate I (201) and the hanger (203), and between the fixed plate II (202) and the hanger (203); An abutment plate (205) is provided on the lifting rod (203) and abuts against the side end of the wing plate; A support beam (206) is mounted on the hanger (203) and is used to mount the support beam assembly (12).

2. According to claim 1, a truss-type formwork system for cast-in-place steel structure floor slabs, wherein the fixing plate I (201) is disposed on the outside of the flange of the main structure I-beam (11) and its length is greater than the length of the flange; and the fixing plate II (202) is disposed on the side end of the web of the main structure I-beam (11) and is attached to the surface of the flange.

3. The truss-type formwork system for cast-in-place steel structure floor slabs according to claim 1, characterized in that, Both the fixing plate I (201) and the fixing plate II (202) are provided with side openings (207) for inserting the rod (203), and the diameter of the adjusting nut (204) is greater than the width of the side opening (207).

4. The truss-type formwork system for cast-in-place steel structure floor slabs according to claim 1, characterized in that, The end of the fixed plate II (202) away from the wing plate of the main structure I-beam (11) is provided with an adjusting column assembly (208) connected to the fixed plate I (201).

5. A truss-type formwork system for cast-in-place steel structure floor slabs according to claim 4, characterized in that, The adjusting column assembly (208) includes a connecting cylinder (208a) disposed on the fixed plate II (202), a connecting rod (208b) disposed on the fixed plate I (201) and inserted into the connecting cylinder (208a), and a spring (208c) disposed in the connecting cylinder (208a) and connected to the connecting rod (208b).

6. A truss-type formwork system for cast-in-place steel structure floor slabs according to claim 1, characterized in that, The mounting system further includes: an internally threaded cylinder (209) disposed on the side of the fixed plate II (202) near the web of the main structure I-beam (11) and rotatably connected to the fixed plate II (202); a top support rod (210) threadedly connected to the internally threaded cylinder (209) and acting on the inner surface of the flange of the main structure I-beam (11); a fixing ring (211) disposed on the top support rod (210); an adjusting ring (212) disposed on the hanger rod (203); and a crossbar (213) for connecting the fixing ring (211) and the adjusting ring (212).

7. A truss-type formwork system for cast-in-place steel structure floor slabs according to claim 6, characterized in that, The adjusting ring (212) includes a semi-ring I (212a) and a semi-ring II (212b) connected to the crossbar (213) respectively, two screw holes (212c) respectively provided in the semi-ring I (212a) and the semi-ring II (212b), and a fixing bolt (212d) for connecting the semi-ring I (212a) and the semi-ring II (212b).

8. A truss-type formwork system for cast-in-place steel structure floor slabs according to claim 6, characterized in that, The end of the top support rod (210) is provided with a wear-resistant layer (210a).

9. A truss-type formwork system for cast-in-place steel structure floor slabs according to claim 1, characterized in that, The abutment plate (205) is provided with a clamping layer (205a) near the wing end of the main structure I-beam (11).

Images