A device for preventing lateral instability during the installation of a single-plane steel truss

Abstract

The present invention discloses a device for preventing lateral instability during the installation of a single steel truss, which relates to the technical field of building profiles. Square steel pipes are welded at the central positions in the length and height directions of the upper chord. Four first connecting plates are welded on both sides of the square steel pipes, and four first connecting plates are also welded at both ends of the upper chord. Each first connecting plate on the square steel pipe is connected to the corresponding first connecting plate on the side of the upper chord through a connecting member composed of a first steel wire rope and a first turnbuckle; two second connecting plates are welded on the lower side of the square steel pipe, and two second connecting plates are also welded at the central position of the length of the lower chord. Each second connecting plate on the square steel pipe is connected to the corresponding second connecting plate on both sides of the lower chord through a connecting member composed of a second steel wire rope and a second turnbuckle. By installing a lateral strengthening device on the steel truss, the present invention forms a stable spatial structure, ensures the out-of-plane stability during the installation of a single steel truss, improves construction safety, and has broad application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of building profiles, and particularly relates to a device for preventing lateral instability during the installation of a single steel truss. Background Art

[0002] With the continuous development of China's economy, various steel trusses are widely used in fields such as building construction, municipal engineering, and electric power. Due to the continuous increase in the span and height of steel trusses, the installation difficulty also increases continuously. Under the condition of a narrow construction site space, a single-steel-truss installation plan is often adopted for steel trusses. At this time, it is often impossible to set up guy ropes after the first truss is in place, and it is impossible to ensure the out-of-plane stability during the installation process, which brings great risks to construction safety. To solve the above problems, it is particularly necessary to design a device for preventing lateral instability during the installation of a single steel truss. Summary of the Invention

[0003] Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a device for preventing lateral instability during the installation of a single steel truss, which has a simple structure and reasonable design. By installing a lateral strengthening device on the steel truss, a stable spatial structure can be formed, ensuring the out-of-plane stability during the installation process, improving construction safety, and being easy to promote and use.

[0004] To achieve the above purpose, the present invention is realized through the following technical solutions: A device for preventing lateral instability during the installation of a single steel truss includes an upper chord, web members, a lower chord, and a lateral strengthening device. Web members are installed between the upper chord and the lower chord, and the lateral strengthening device is installed on the steel truss; the lateral strengthening device includes a square steel pipe, a first connecting plate, a first steel wire rope, a first turnbuckle bolt, a second connecting plate, a second steel wire rope, and a second turnbuckle bolt. The square steel pipe is welded at the central position in the length and height directions of the upper chord. Four first connecting plates are welded on both sides of the square steel pipe, and four first connecting plates are also welded at both ends of the upper chord. Each first connecting plate on the square steel pipe is connected to the corresponding first connecting plate on the upper chord through a connecting member composed of a first steel wire rope and a first turnbuckle bolt; two second connecting plates are welded on the lower side of the square steel pipe, and two second connecting plates are also welded at the central position of the length of the lower chord. Each second connecting plate on the square steel pipe is connected to the corresponding second connecting plate on both sides of the lower chord through a connecting member composed of a second steel wire rope and a second turnbuckle bolt.

[0005] Preferably, the first steel wire rope and the first turnbuckle bolt are integrated into one body, with a total of four groups. The two ends of each group of first steel wire ropes are connected to the corresponding first connecting plate on the corresponding side through shackles. By adjusting the first turnbuckle bolt, the first steel wire rope bears a pre-tension force and applies it to both sides of the center of the upper chord to resist horizontal loads.

[0006] Preferably, the second steel wire rope and the second turnbuckle form an integral unit, with a total of two groups. The two ends of each second steel wire rope are connected to the second connecting plates on the corresponding sides through shackles. By adjusting the second turnbuckle, the second steel wire rope bears a pre-tension force, which is applied to both sides of the center of the lower chord rod to restrain lateral deformation.

[0007] Advantages of the present invention: By installing a lateral strengthening device on the steel truss, a stable spatial structure is formed, ensuring the out-of-plane stability during the installation process of a single steel truss, thereby improving construction safety, protecting the lives of workers, and having broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will be described in detail below with reference to the drawings and specific embodiments;

[0009] Figure 1 is a schematic structural diagram of the present invention;

[0010] Figure 2 is Figure 1 a sectional view taken along line A-A in

[0011] Figure 3 is Figure 1 a sectional view taken along line B-B in EMBODIMENTS

[0012] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0013] Refer to Figures 1-3, the present specific embodiment adopts the following technical solution: A device for preventing lateral instability during the installation of a single-plane steel truss, including an upper chord 1, web members 2, a lower chord 3, and a lateral strengthening device 4. Web members 2 are installed between the upper chord 1 and the lower chord 3, and the lateral strengthening device 4 is installed on the steel truss; the lateral strengthening device 4 includes a square steel pipe 4-1, a first connecting plate 4-2, a first steel wire rope 4-3, a first turnbuckle 4-4, a second connecting plate 4-5, a second steel wire rope 4-6, and a second turnbuckle 4-7. The square steel pipe 4-1 is welded at the central position in the length and height directions of the upper chord 1. Four first connecting plates 4-2 are welded on both sides of the square steel pipe 4-1, and four first connecting plates 4-2 are also welded at both ends of the upper chord 1. Each first connecting plate 4-2 on the square steel pipe 4-1 is connected to the corresponding first connecting plate 4-2 on the upper chord 1 through a connecting member composed of the first steel wire rope 4-3 and the first turnbuckle 4-4; two second connecting plates 4-5 are welded on the lower side of the square steel pipe 4-1, and two second connecting plates 4-5 are also welded at the central position of the length of the lower chord 3. Each second connecting plate 4-5 on the square steel pipe 4-1 is connected to the corresponding second connecting plate 4-5 on both sides of the lower chord 3 through a connecting member composed of the second steel wire rope 4-6 and the second turnbuckle 4-7.

[0014] It should be noted that the first steel wire rope 4-3 and the first turnbuckle 4-4 are integrated. Both ends of the first steel wire rope 4-3 are connected to the first connecting plate 4-2 through shackles; the second steel wire rope 4-6 and the second turnbuckle 4-7 are integrated. Both ends of the second steel wire rope 4-6 are connected to the second connecting plate 4-5 through shackles. By adjusting the first turnbuckle 4-4 and the second turnbuckle 4-7 respectively, the first steel wire rope 4-3 and the second steel wire rope 4-6 bear pre-tension, and are applied to both sides of the centers of the corresponding upper chord 1 and lower chord 3 to resist horizontal loads and restrain lateral deformation.

[0015] When the present specific embodiment is used for the installation of a single-plane steel truss, by installing a lateral strengthening device on the steel truss to form a stable space structure, its installation steps are as follows:

[0016] (1) Before the formal hoisting, the steel truss is erected, and then the square steel pipe 4-1 and the first connecting plate 4-2 are welded on the upper chord 1, where the square steel pipe 4-1 is welded at the central position in the length and height directions of the upper chord 1, the first connecting plate 4-2 is welded at both ends of the upper chord 1, and at the same time, the first connecting plate 4-2 is also welded on both sides of the square steel pipe 4-1;

[0017] (2) The second connecting plate 4-5 is welded at the central position of the length of the lower chord 3 and distributed on both sides of it, and at the same time, the second connecting plate 4-5 is also welded on the lower side of the square steel pipe 4-1;

[0018] (3) Integrate the first steel wire rope 4-3 and the first turnbuckle 4-4 into one unit, with a total of four groups. Each group is connected between the corresponding first connecting plates 4-2 through shackles;

[0019] (4) Integrate the second steel wire rope 4-6 and the second turnbuckle 4-7 into one unit, with a total of two groups. Each group is connected between the corresponding second connecting plates 4-5 through shackles;

[0020] (5) Adjust the lengths of the first turnbuckle 4-4 and the second turnbuckle 4-7 respectively until the tightness is appropriate.

[0021] In this specific embodiment, through the combined action of the upper chord 1 and the lower chord 3, a stable structural system is formed with the steel truss, thereby ensuring the out-of-plane stability during the installation process of a single steel truss. Its working principle is as follows: By adjusting the length of the first turnbuckle 4-4, the first steel wire rope 4-3 bears a pre-tension force. This pre-tension force is symmetrically applied to both sides of the center of the upper chord 1 through the square steel pipe 4-1. The square steel pipe 4-1, the first turnbuckle 4-4, and the first steel wire rope 4-3 jointly form a planar force system, which can effectively resist the horizontal loads on both sides of the upper chord, such as wind pressure and construction loads, etc.; By adjusting the length of the second turnbuckle 4-7, the second steel wire rope 4-6 bears a pre-tension force. This pre-tension force is symmetrically applied to both sides of the center of the lower chord 3. The square steel pipe 4-1, the second steel wire rope 4-6, the second turnbuckle 4-7, and the upper chord 1 jointly form a vertical force system, which can make full use of the lateral load resistance ability of the upper chord 1 to restrain the lateral deformation of the lower chord 3 caused by the horizontal load.

[0022] In summary, this specific embodiment can effectively ensure the out-of-plane stability during the installation process of a single steel truss, greatly improve the construction safety, protect the lives of workers, and has a broad market application prospect.

[0023] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing lateral instability during the installation of a single steel truss, characterized in that, It includes an upper chord (1), web members (2), a lower chord (3) and a lateral strengthening device (4). The web members (2) are installed between the upper chord (1) and the lower chord (3), and the lateral strengthening device (4) is installed on the steel truss. The lateral strengthening device (4) includes a square steel pipe (4-1), a first connecting plate (4-2), a first steel wire rope (4-3), a first turnbuckle bolt (4-4), a second connecting plate (4-5), a second steel wire rope (4-6), and a second turnbuckle bolt (4-7). The square steel pipe (4-1) is welded at the central position in the length and height directions of the upper chord (1). Four first connecting plates (4-2) are welded on both sides of the square steel pipe (4-1), and four first connecting plates (4-2) are also welded at both ends of the upper chord (1). Each first connecting plate (4-2) on the square steel pipe (4-1) is connected to the corresponding first connecting plate (4-2) on the upper chord (1) through a connecting member composed of a first steel wire rope (4-3) and a first turnbuckle bolt (4-4). Two second connecting plates (4-5) are welded on the lower side of the square steel pipe (4-1), and two second connecting plates (4-5) are also welded at the central position of the length of the lower chord (3). Each second connecting plate (4-5) on the square steel pipe (4-1) is connected to the corresponding second connecting plate (4-5) on both sides of the lower chord (3) through a connecting member composed of a second steel wire rope (4-6) and a second turnbuckle bolt (4-7). The first steel wire rope (4-3) and the first turnbuckle bolt (4-4) are integrated into one body, with a total of four groups. The two ends of each group of the first steel wire rope (4-3) are connected to the corresponding first connecting plate (4-2) on the corresponding side through shackles. The length of the first turnbuckle bolt (4-4) is adjustable. By adjusting the length of the first turnbuckle bolt (4-4), the first steel wire rope (4-3) bears a pre-tension force, and the pre-tension force is applied to both sides of the center of the upper chord (1) through the square steel pipe (4-1). The square steel pipe (4-1), the first turnbuckle bolt (4-4) and the first steel wire rope (4-3) jointly form a planar force system to resist the horizontal loads acting on both sides of the upper chord (1).

2. The device for preventing lateral instability during the installation of a single steel truss according to claim 1, characterized in that, The second steel wire rope (4-6) and the second turnbuckle bolt (4-7) are integrated into one body, with a total of two groups. The two ends of each group of the second steel wire rope (4-6) are connected to the corresponding second connecting plate (4-5) on the corresponding side through shackles.

3. The device for preventing lateral instability during the installation of a single steel truss according to claim 1, characterized in that, The length of the second turnbuckle bolt (4-7) is adjustable. By adjusting the length of the second turnbuckle bolt (4-7), the second steel wire rope (4-6) bears a pre-tension force, and the pre-tension force is symmetrically applied to both sides of the center of the lower chord (3). The square steel pipe (4-1), the second steel wire rope (4-6), the second turnbuckle bolt (4-7) and the upper chord (1) jointly form a vertical force system to utilize the lateral load resistance ability of the upper chord (1) to restrain the lateral deformation of the lower chord (3) caused by the horizontal load.

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