Angle brace applied to assembly type combined steel support

Abstract

The invention relates to the field of civil engineering, and particularly discloses an angle brace applied to an assembly type combined steel support. A straight tie bar; an inclined tie bar; angle brace; the main supports are hot-rolled H-shaped steel supports, are arranged on the two sides of the foundation pit and are used for supporting the side walls of the foundation pit; the straight tie bars are hot-rolled channel steel, the straight tie bars are connected with a plurality of parallel main supports, the straight tie bars are arranged on the outer sides of upper and lower flanges of the main supports, and the straight tie bars are connected with the main supports through bolts; the inclined tie bars are hot-rolled channel steel, are connected with the plurality of parallel main supports, are arranged on the outer sides of upper and lower flanges of the main supports, are connected with the main supports through bolts, and are combined with the straight tie bars to form a web member system of the solid web truss, so that the stability of the lower flange of the H-shaped steel is effectively improved, and the stability of the lower flange of the H-shaped steel is improved. And the deformation or instability of the tie bar in the absence of a lower tie bar is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, in particular to a corner brace used for assembled composite steel supports. Background Art

[0002] In underground structure projects, special foundation pit support construction is required to meet construction excavation conditions and control deformation of the surrounding environment, among which some foundation pit support projects adopt prefabricated composite steel support systems.

[0003] Prefabricated composite steel supports are widely used in foundation pit projects due to their advantages such as fast installation speed, convenient construction, recyclable and reusable, balanced loading to control foundation pit deformation, and low cost. During the construction of hot-rolled H-steel composite steel supports, in order to ensure the overall compressive stability of the steel support system, tie rods need to be set on the upper and lower flanges of the composite H-steel supports to form a truss structure to ensure the stability of the steel support when under pressure. In actual applications, the tie rods are inconvenient to install: according to relevant regulations, the tie rods need to be set on the upper and lower surfaces of the prefabricated composite steel supports. Considering the on-site construction conditions, the lower tie rods are inconvenient to install and have low operating efficiency. Some projects will cancel the lower tie rods. The upper single-side tie rod cannot ensure the stability of the lower flange of the H-steel, which creates a safety hazard for the support system. Summary of the invention

[0004] The object of the present invention is to provide a corner brace for use in assembled composite steel supports to solve the technical problems raised in the above-mentioned background technology.

[0005] Based on the above ideas, the present invention provides the following technical solution: a corner brace used for assembled composite steel support, characterized in that it includes:

[0006] Main support; straight tie rod; diagonal tie rod; corner support; support rod; the main support is a hot-rolled H-shaped steel support, the main support is arranged on both sides of the foundation pit, and the main support is used to support the side wall of the foundation pit;

[0007] The straight tie rod is a hot-rolled channel steel, the straight tie rod connects a plurality of parallel main supports, the straight tie rod is arranged outside the upper and lower flanges of the main supports, and the straight tie rod is connected to the main supports by bolts;

[0008] The diagonal tie rods are hot-rolled channel steels, and the diagonal tie rods connect multiple parallel main supports. The diagonal tie rods are arranged outside the upper and lower flanges of the main supports. The diagonal tie rods are connected to the main supports by bolts, and the diagonal tie rods are combined with the straight tie rods to form a web bar system of the solid web truss.

[0009] Preferably, the corner brace is an oblique supporting member, the corner brace connects the lower flange of the main brace and the straight tie, the angle between the corner brace and the straight tie is 45°, the corner brace is connected to the straight tie by bolts, the corner brace is welded into a whole by a brace rod and a connecting plate, the brace rod is a member capable of withstanding tensile and compressive forces, and the connecting plate is provided with connecting bolt holes.

[0010] Preferably, the support rod is made of No. 10 hot-rolled I-beam, and the connecting plate is made of L90X56X8 angle steel.

[0011] Preferably, it is characterized in that bolt holes with fixed spacing are arranged on the upper and lower flanges of the main support for connection with the straight tie rods or the diagonal tie rods.

[0012] Preferably, fixing bolt holes are provided on the webs at both ends of the straight tie rod and the diagonal tie rod for assembly with the main support by M24 bolts.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The corner brace reduces the reliance on the tie rods below, simplifies the construction process, and improves the operating efficiency, especially when the installation space is small. In the actual construction process, the construction personnel can install the corner brace more conveniently without reserving additional operating space for the installation of the tie rods below. This not only simplifies the construction process and reduces the difficulty of construction, but also significantly shortens the construction period and improves the construction efficiency. By reducing the reliance on the tie rods below, the corner brace design provides a more efficient and economical construction solution.

[0015] Through the diagonal support design, the corner brace effectively improves the stability of the lower flange of the H-beam and eliminates the safety hazards caused by the lack of lower tie rods. The traditional support structure is prone to bending or instability of the lower flange of the H-beam under the action of external forces due to the lack of lower tie rods, increasing the safety risks of the project. The diagonal support design of the corner brace can evenly distribute the force of the lower flange of the H-beam to the entire support structure, effectively avoiding stress concentration in a single direction and enhancing the stability and safety of the structure.

[0016] The design of the corner brace makes the force of the supporting structure more reasonable, disperses the stress concentration, and enhances the bearing capacity and durability of the overall supporting system. In practical applications, the supporting structure often needs to withstand various complex loads, such as soil pressure, water pressure and construction loads. By adding diagonal corner braces, these loads can be more evenly dispersed throughout the structure, reducing local stress concentration and the risk of structural deformation and damage. The design of the corner brace not only improves the bearing capacity of the structure, but also extends the service life of the supporting system.

[0017] Corner braces effectively convert vertical and horizontal loads into oblique loads through their oblique support components, so that the supporting structure can more evenly distribute the load when subjected to external forces, reducing the stress concentration in a single direction. The design of the corner brace plays an important role in bearing in the support system, ensuring the stability of the support system under complex stress conditions. The bearing capacity of the corner brace is particularly important, especially when the foundation soil is poor or the construction load is large.

[0018] The design of the corner brace makes full use of the mechanical properties of steel. Through reasonable structural design, the force on the steel is more uniform, reducing unnecessary material waste. Compared with traditional linear corner braces, the corner brace can use smaller steel specifications when bearing the same load, thereby reducing material costs. This not only improves material utilization efficiency, but also helps to achieve green construction, reduce resource consumption and environmental impact.

[0019] The modular design of the corner brace makes it easier to install and maintain. Since the corner brace is composed of multiple sections of braces and connecting plates, and the components are connected by bolts, the installation process is simpler and faster. Construction workers can quickly assemble and adjust the angle and position of the corner brace on site, reducing installation time and labor costs. In addition, when the corner brace needs to be maintained or replaced, only the damaged parts need to be removed, without the need to dismantle the entire brace, which reduces maintenance costs and difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic plan view of the main structure of a corner brace used in an assembled composite steel support according to the first embodiment of the present invention;

[0021] Figure 2 A corner brace for an assembled composite steel support according to the first embodiment of the present invention Figure 1 Schematic diagram of the cross section at AA;

[0022] Figure 3 This is a main structural side view of a corner brace used in an assembled composite steel support according to the first embodiment of the present invention;

[0023] Figure 4 A corner brace for an assembled composite steel support according to the first embodiment of the present invention Figure 3 BB view;

[0024] Figure 5 This is a schematic plan view of the main structure of a corner brace used in an assembled composite steel support according to a second embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a corner brace structure used in an assembled composite steel support according to the present invention;

[0026] Figure 7The present invention is a top view of a corner brace structure used for a corner brace of an assembled composite steel support.

[0027] In the figure: 1, main support; 2, straight tie rod; 3, diagonal tie rod; 4, corner support; 41, support rod; 42, connecting plate. DETAILED DESCRIPTION

[0028] Example 1

[0029] like Figure 1-4 , a corner brace used for assembled composite steel support, characterized by comprising:

[0030] Main support 1; straight tie rod 2; oblique tie rod 3; corner support 4; support rod 41; the main support 1 is a hot-rolled H-shaped steel support, and the main support 1 is arranged on both sides of the foundation pit, and the main support 1 is used to support the side wall of the foundation pit.

[0031] The hot-rolled H-shaped steel main support can provide higher bearing capacity and rigidity, ensure the stability of the side walls of the foundation pit, effectively prevent deformation and collapse of the side walls of the foundation pit, and improve project safety.

[0032] The straight tie rods 2 are hot-rolled channel steels, and the straight tie rods 2 connect multiple parallel main supports 1. The straight tie rods 2 are arranged outside the upper and lower flanges of the main supports 1, and the straight tie rods 2 are connected to the main supports 1 by bolts.

[0033] The design of the straight tie rods 2 increases the lateral rigidity of the structure. By being arranged on the outer sides of the upper and lower flanges of the main support, the force is made more uniform, thereby enhancing the stability and bearing capacity of the overall structure.

[0034] The diagonal tie rods 3 are hot-rolled channel steels, and the diagonal tie rods 3 connect multiple parallel main supports 1. The diagonal tie rods 3 are arranged on the outer sides of the upper and lower flanges of the main supports 1. The diagonal tie rods 3 are connected to the main supports 1 by bolts. The diagonal tie rods 3 are combined with the straight tie rods 2 to form a web system of a solid web truss.

[0035] The diagonal tie rods 3 are combined with the straight tie rods 2 to form a web bar system of a solid web truss, which further enhances the bending and shearing resistance of the structure, provides a more solid and reliable supporting structure, and improves the overall mechanical properties.

[0036] Specifically, the corner brace 4 is an oblique supporting member, which connects the lower flange of the main brace 1 and the straight tie rod 2. The angle between the corner brace 4 and the straight tie rod 2 is 45°. The corner brace 4 is connected to the straight tie rod 2 by bolts. The corner brace 4 is welded into a whole by a brace rod 41 and a connecting plate 42. The brace rod 41 is a member that can withstand tensile and compressive forces, and the connecting plate 42 is provided with connecting bolt holes.

[0037] The corner brace 4 is connected at a 45° angle, which effectively disperses the vertical and horizontal loads, reduces the stress concentration in a single direction, and improves the compressive strength and stability of the overall structure. In addition, the bolt connection method makes installation and maintenance easy.

[0038] Specifically, the support rod 41 is made of No. 10 hot-rolled I-beam steel, and the connecting plate 42 is made of L90X56X8 angle steel.

[0039] No. 10 hot-rolled I-beam brace has high load-bearing capacity and bending resistance, and can effectively resist the tensile, compressive and shear forces that may occur during the construction process, thereby improving the overall stability and durability of the corner brace.

[0040] The L90X56X8 angle steel connecting plate has high strength and rigidity, ensuring a firm connection between the brace and other components, and improving the overall rigidity and impact resistance of the corner brace.

[0041] Specifically, it is characterized in that bolt holes with fixed intervals are arranged on the upper and lower flanges of the main support 1 for connecting with the straight tie rods 2 or the oblique tie rods 3 .

[0042] The fixed-spacing bolt hole design simplifies the installation process, improves the stability and reliability of the connection, facilitates quick construction and adjustment, and reduces construction time and cost.

[0043] Specifically, fixing bolt holes are provided on the webs at both ends of the straight tie rod 2 and the oblique tie rod 3 for assembly with the main support 1 by means of M24 bolts.

[0044] The design of the fixing bolt holes on the webs at both ends of the straight tie rods and the diagonal tie rods ensures a stable connection with the main support, increases the strength and rigidity of the connection, prevents loosening and displacement, and improves the reliability of the overall support system.

[0045] Working principle:

[0046] The corner brace 4 connects the lower flange of the main brace 1 and the straight tie rod 2 at an angle of 45°. When the H-beam is subjected to stress, the corner brace 4 can effectively disperse the loads from different directions and transfer part of the load to the straight tie rod 2, thereby reducing the stress concentration on the lower flange of the H-beam and enhancing its stability.

[0047] The support rod 41 is made of hot-rolled I-beam steel and has high tensile and compressive resistance. The oblique support member not only bears tensile stress, but also bears certain compressive stress, ensuring that the support structure can remain stable under various stress conditions.

[0048] Through bolt connection, the corner brace 4 is firmly connected with the main brace 1 and the straight tie rod 2 to form an integral support system. The bolt connection method makes installation easier and is convenient for subsequent inspection and maintenance.

[0049] Example 2

[0050] like Figure 5-7 In order to provide a corner brace for assembled composite steel support with a greater load capacity based on Example 1,

[0051] include:

[0052] The main support 1 is made of hot-rolled H-shaped steel and is arranged on both sides of the foundation pit to support the side walls of the foundation pit. Bolt holes with fixed spacing are provided on the upper flange and the lower flange of the main support 1 so as to be connected with other components such as tie rods by bolts.

[0053] Straight tie rods 2 are made of hot-rolled channel steel and connect multiple parallel main supports. Straight tie rods are arranged outside the upper and lower flanges of the main supports and are connected to the main supports by bolts to provide horizontal support.

[0054] The diagonal tie rods 3 are also made of hot-rolled channel steel and connect multiple parallel main supports. The diagonal tie rods are arranged outside the upper and lower flanges of the main supports and are connected to the main supports by bolts. They are combined with the straight tie rods to form a web bar system of a solid web truss, thereby enhancing the lateral stability of the support system.

[0055] Corner brace 4 is an oblique support member, and its main feature is its folding structural design. The corner brace is composed of two sections of struts 41 connected respectively, and the two sections of struts 41 form a folded shape. The specific shape is as follows:

[0056] The first section of the brace extends obliquely upward from the lower flange of the main brace and is connected to the second section of the brace. The second section of the brace extends obliquely upward to the lower flange of the straight tie rod 2.

[0057] The connecting plate 42 is located at one end of each strut section and is respectively connected to the main strut and the straight tie rod by bolts.

[0058] Working principle:

[0059] By setting the angle brace of the oblique supporting member, the stability of the lower flange of the H-shaped steel is effectively improved to prevent it from deformation or instability when there is no lower tie rod.

[0060] The design of the corner brace enables the supporting structure to distribute the load more evenly when subjected to external forces, thereby improving the bearing capacity of the overall structure.

[0061] Compared with the traditional method of setting tie rods on both the upper and lower surfaces, the corner brace design reduces the reliance on the lower tie rods, simplifies the installation steps and improves construction efficiency.

[0062] The folded corner brace is formed by forming two sections of bracing rods into a folded shape. This design allows the corner brace to distribute the load more evenly when under pressure, reducing stress concentration, thereby improving the stability and compressive resistance of the entire support system. Especially in complex foundation pit environments, this design can effectively prevent deformation and instability of the support structure and ensure the safety of the project.

[0063] Under dynamic loads such as earthquakes, traditional straight corner braces are prone to structural failure due to stress concentration in a single direction. The folded corner brace can more effectively absorb and disperse the energy generated by earthquakes, reduce structural vibration, and improve seismic performance through its multi-section brace design.

[0064] The design of the folded corner brace makes full use of the mechanical properties of steel. Through reasonable structural design, the force on the steel is more uniform, reducing unnecessary material waste. Compared with traditional linear corner braces, the folded corner brace can use smaller steel specifications when bearing the same load, thereby reducing material costs. This not only improves material utilization efficiency, but also helps to achieve green construction, reduce resource consumption and environmental impact.

[0065] The folding corner brace has a unique structural design that makes the force path more reasonable. The presence of the middle connecting plate enables the corner brace to evenly distribute the pressure in all directions when it is stressed, reducing the stress concentration in a single direction. This optimized mechanical property not only improves the bearing capacity of the corner brace, but also extends its service life.

[0066] The design concept of the folding corner brace meets the comprehensive requirements of modern engineering for structural safety, construction convenience, economy and aesthetics. Its innovative structural form provides a new solution for the support system of foundation pit engineering and has broad application prospects. Through actual engineering applications, the superior performance of the folding corner brace has been fully verified, becoming an important innovation in the field of foundation pit support.

[0067] In summary, the design of folded corner bracing has significant beneficial effects in foundation pit engineering, including enhancing structural stability and compressive strength, improving construction flexibility and adaptability, enhancing seismic performance, improving installation and maintenance convenience, improving material utilization efficiency, providing better aesthetics and space utilization, optimizing mechanical properties, and complying with modern engineering design concepts. These beneficial effects not only improve the safety and reliability of the foundation pit support system.

Claims

1. A corner brace used in assembled composite steel supports, characterized in that: include: Main support (1); Straight tie rod (2); Diagonal tie rod (3); corner brace (4); The main support (1) is a hot-rolled H-shaped steel support, and the main support (1) is arranged on both sides of the foundation pit, and the main support (1) is used to support the side wall of the foundation pit; The straight tie rod (2) is a hot-rolled channel steel, the straight tie rod (2) connects a plurality of parallel main supports (1), the straight tie rod (2) is arranged outside the upper and lower flanges of the main supports (1), and the straight tie rod (2) is connected to the main supports (1) by bolts; The diagonal tie rod (3) is a hot-rolled channel steel, the diagonal tie rod (3) connects a plurality of parallel main supports (1), the diagonal tie rod (3) is arranged outside the upper and lower flanges of the main supports (1), the diagonal tie rod (3) is connected to the main supports (1) by bolts, and the diagonal tie rod (3) and the straight tie rod (2) are combined to form a web member system of a solid web truss; The corner brace (4) is an oblique supporting member, the corner brace (4) connects the lower flange of the main brace (1) and the straight tie rod (2), the angle between the corner brace (4) and the straight tie rod (2) is 45 degrees, the corner brace (4) and the straight tie rod (2) are connected by bolts, the corner brace (4) is welded into a whole by a brace rod (41) and a connecting plate (42), the brace rod (41) is a member capable of bearing tension and pressure, and the connecting plate (42) is provided with a connecting bolt hole.

2. The corner brace used for assembled composite steel support according to claim 1, characterized in that: The support rod (41) is made of No. 10 hot-rolled I-beam steel, and the connecting plate (42) is made of L90X56X8 angle steel.

3. Claim 3 The corner brace used for assembled composite steel support according to claim 1 or 2, characterized in that: Bolt holes with fixed spacing are arranged on the upper and lower flanges of the main support (1) for connection with the straight tie rods (2) or the oblique tie rods (3).

4. The corner brace used for assembled composite steel support according to claim 3, characterized in that: The webs at both ends of the straight tie rod (2) and the diagonal tie rod (3) are provided with fixing bolt holes for assembling with the main support (1) by means of M24 bolts.

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