Net rack outer wrapping steel pipe welding type reinforcing structure

Abstract

The utility model relates to the technical field of steel structure reinforcing, in particular to a welded reinforcing structure for a steel pipe wrapped outside a net rack, which comprises a newly added outer pipe formed by splicing two semicircular pipes, and the two semicircular pipes are welded and fixed into an integral structure; the newly-added outer pipe is arranged on the periphery of the existing steel pipe in a sleeved mode, a certain gap is reserved between the newly-added outer pipe and the existing steel pipe, and filling materials are poured into the gap. The steel pipe reinforcing device has the advantages that the existing steel pipe is effectively reinforced without damage, and the existing steel roof truss structure is not influenced; the structure is simple and reasonable, the prefabrication degree is high, construction is convenient and efficient, rapid construction can be achieved in the skylight operation period, uninterrupted operation is ensured, and the method is suitable for popularization.

Description

Technical Field

[0001] This utility model relates to the field of steel structure reinforcement technology, specifically to a welded reinforcement structure for a space frame with external steel pipes. Background Technology

[0002] When existing subway stations are designed and constructed, seismic design is generally based solely on the codes and regulations in effect at the time. Common existing space frame roofs include steel roof trusses and roof panels supported on the steel trusses. Due to changes in building function requirements, such as replacing the roof panels (e.g., replacing the original color steel panels with aluminum-magnesium-manganese panels that offer better insulation, waterproofing, and durability), the dead load increases. Therefore, reinforcement is needed in conjunction with the overall seismic design, especially for space frame members that do not meet the calculation requirements.

[0003] If the existing steel pipes do not meet the requirements, effective supports must be set around the replacement members to restore the members to their pre-loading state before the steel pipes can be unscrewed and replaced. However, this method has a significant impact on station operations. Furthermore, since the steel roof truss is an integral load-bearing structure, removing a single steel pipe member will affect the overall load-bearing state. If a safety issue arises, it could lead to the collapse of the space frame, with extremely serious consequences.

[0004] Therefore, how to comprehensively consider factors such as design safety, tight construction time, and uninterrupted operation to reinforce the existing steel pipes of existing steel roof trusses is an urgent technical problem to be solved. Summary of the Invention

[0005] The purpose of this utility model is to address the shortcomings of the prior art by providing a welded steel pipe reinforcement structure for a space frame. By adding new steel pipes around the existing steel pipes and forming a whole, the structural performance of the existing steel pipes is improved, ensuring that the supporting load-bearing capacity of the steel roof truss meets the requirements.

[0006] The objective of this utility model is achieved through the following technical solution:

[0007] A welded steel pipe reinforcement structure for a space frame is used to reinforce existing steel pipes in a steel roof truss. Its features include: a new outer pipe composed of two semi-circular pipes joined together, the two semi-circular pipes being welded and fixed together as an integral structure; the new outer pipe is sleeved around the existing steel pipe, with a certain gap between the new outer pipe and the existing steel pipe, and filling material is poured into this gap.

[0008] The semi-circular tubes are connected by bevel butt welding, which is symmetrical and intermittent.

[0009] The semi-circular tube has pre-drilled injection holes at both ends and in the middle, which are sealed after the filling material is injected.

[0010] The end of the newly added outer tube is sealed to the existing node plate by fillet weld.

[0011] The filler material is epoxy resin.

[0012] The advantages of this utility model are: it achieves non-destructive and effective reinforcement of existing steel pipes without affecting the existing steel roof truss structure; the structure is simple and reasonable, with a high degree of prefabrication, convenient and efficient construction, and can be quickly constructed during the operation window period to ensure uninterrupted operation, making it suitable for widespread application. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the present invention;

[0014] Figure 2 This is a longitudinal view of the present invention. Detailed Implementation

[0015] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0016] like Figure 1-2 As shown in the figure, numbers 1-6 represent: existing steel pipe 1, newly added outer pipe 2, weld 3, epoxy injection 4, fillet weld 5, bolt ball connection sealing plate 6.

[0017] Example: Combining Figure 1 and Figure 2 As shown, the welded steel pipe reinforcement structure of this embodiment is used to reinforce the existing steel pipe 1, which is a member of the existing steel roof truss. When it is necessary to improve the supporting load-bearing capacity of the steel roof truss, the existing steel pipe 1 can be reinforced by the reinforcement structure of this embodiment. In this embodiment, the steel roof truss adopts a bolted ball space frame system, and bolted ball connection sealing plates 6 are provided at both ends of the existing steel pipe 1 for connection with bolted balls.

[0018] Combination Figure 1 and Figure 2 As shown, the reinforcement structure in this embodiment includes a new outer pipe 2 sleeved around the existing steel pipe 1. The new outer pipe 2 is composed of two semi-circular pipes welded together, with a weld seam 3 between them. The shape and size of the two semi-circular pipes are compatible with the shape and size of the existing steel pipe 1. The two semi-circular pipes are butt-welded with a bevel, symmetrically and intermittently, and injection holes are reserved at both ends and in the middle.

[0019] A certain gap is left between the newly added outer pipe 2 and the existing steel pipe 1. The gap is filled with epoxy resin 4. The newly added outer pipe 2 and the existing steel pipe 1 are connected longitudinally to form an integral structure through the epoxy resin 4, so that the existing steel pipe 1 and the newly added outer pipe 2 can work together.

[0020] In this embodiment, the existing steel pipe 1 and the newly added outer pipe 2 are connected by epoxy injection 4 to form an integral load-bearing structure. The two work together to improve the structural performance of the existing steel pipe 1, especially to improve the instability limit of the members, thereby increasing the support and bearing capacity of the steel roof truss.

[0021] In this embodiment, in order to enable the newly added outer tube 2 to participate in the stress of the steel roof truss, the newly added outer tube 2 is sealed to the existing node plate by fillet welding.

[0022] In practical applications, this embodiment includes the following process:

[0023] Based on the calculation results, steel pipes with a diameter and wall thickness not less than the required calculated value (leaving a few millimeters of gap between the inner wall and the original member) are used. The length of the existing steel pipe 1 is measured on site, and the steel pipe is cut into two semi-circular steel pipes. The steel pipes are then welded to the outside of the existing steel pipe 1 to form a new outer pipe 2. The new outer pipe 2 is then welded to the existing node plate. Glue injection holes are reserved at both ends and in the middle of the member. The gap between the new outer pipe 2 and the existing steel pipe 1 is filled with epoxy glue 4.

[0024] In this way, the original structure can be strengthened while it continues to serve. After the epoxy grout is filled, the inner and outer walls can work together to improve the instability limit of the members and enhance their strength.

[0025] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A welded steel pipe reinforcement structure for a space frame, used to reinforce existing steel pipes in a steel roof truss, characterized in that: The application relates to a new outer pipe which is composed of two half circular pipes and is welded and fixed between the two half circular pipes to form an integral structure; the new outer pipe is sleeved on the periphery of an existing steel pipe, and a gap is left between the new outer pipe and the existing steel pipe, and filling material is filled in the gap.

2. The welded reinforcing structure of the outer steel tube of the space truss according to claim 1, characterized in that: The two half circular pipes are welded by using a bevel butt joint and are symmetrically and discontinuously welded.

3. The welded reinforcing structure of the outer steel tube of the space truss according to claim 1 or 2, characterized in that: Both ends and the middle part of the half circular pipes are provided with filling holes which are closed after the filling material is filled.

4. The welded reinforcing structure of the outer steel tube of the space truss according to claim 1, characterized in that: The end of the new outer pipe and the existing node plate are closed by angle welding.

5. The welded reinforcing structure of the outer steel tube of the space truss according to claim 1, characterized in that: The filling material is epoxy injection glue.

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