Flange connection steel pipe concrete pole and construction method

Abstract

The invention provides a flange connection steel pipe concrete pole and a construction method, and relates to the technical field of building construction. The flange connection steel pipe concrete pole comprises a flange joint and a pole body, the flange joints are arranged at the two ends of the rod body. The flange joint comprises a flange plate and an annular stiffening rib. The annular stiffening ribs are fixedly installed on the flange plate and provide support for the flange joint. The rod body comprises an outer steel pipe, an inner steel pipe, steel pipe stiffening ribs and concrete. The outer steel pipe and the inner steel pipe are coaxially arranged, and the outer steel pipe is arranged outside the inner steel pipe in a sleeving mode. The steel pipe stiffening ribs are arranged between the outer steel pipe and the inner steel pipe and fixedly connected with the outer steel pipe and the inner steel pipe. And the concrete is filled between the outer steel pipe and the inner steel pipe. The stress stability of the rod body can be improved, and the problem that the connecting area of the flange joint and the rod body is prone to breakage and warping is solved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a flange-connected steel tube concrete rod and a construction method. Background Art

[0002] With the continuous development of urban construction, the demand for electricity in cities has gradually increased, and the transmission structure has also been evolving. Common transmission structures include angle steel towers, steel pipe towers and guyed towers. Among them, the angle steel tower has a strong structure, good stability and low cost, but its root opening is large and occupies a large area, which is not suitable for urban construction; the steel pipe tower has low wind pressure, high cross-sectional bending stiffness, and can give full play to the bearing performance of the material. It is often used in low-voltage level lines, and the stability problem is prominent. Steel tube concrete structure has a series of advantages such as high bending stiffness, high bearing capacity and convenient construction. It is gradually applied to transmission, bridges and other structures, but the bonding force between steel pipes and concrete is limited. Under long-term loads, the interface may slip, affecting the overall force performance and durability of the structure. Common flange connection nodes include flexible flange nodes and rigid flange nodes. Among them, the flexible flange node has low stiffness and obvious prying force; the rigid flange node node plate is thicker, there is a risk of tearing between the flange layers, and the influence of welding residual stress cannot be ignored. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a flange-connected steel tube concrete rod and a construction method to solve the problems of stability of the rod body when subjected to force, easy fracture of the node and the rod body connection area, excessive thickness of the flange, warping of the flange, etc.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A flange-connected concrete-filled steel tube rod comprises a flange node and a rod body;

[0006] The flange nodes are arranged at both ends of the rod body;

[0007] The flange node includes a flange plate and annular stiffening ribs; the annular stiffening ribs are installed and fixed on the flange plate to provide support for the flange node;

[0008] The rod body includes an outer steel pipe, an inner steel pipe, steel pipe stiffening ribs and concrete; the outer steel pipe is coaxially arranged with the inner steel pipe, and the outer steel pipe is sleeved outside the inner steel pipe; the steel pipe stiffening ribs are arranged between the outer steel pipe and the inner steel pipe, and the steel pipe stiffening ribs are fixedly connected to the outer steel pipe and the inner steel pipe; the concrete is filled between the outer steel pipe and the inner steel pipe.

[0009] Optionally or preferably, the annular stiffening ribs are arranged in a ring on one side of the flange close to the rod body with the axis as the center, and the annular stiffening ribs are arranged on the edge of the flange; the annular stiffening ribs are also fixedly connected to the steel pipe stiffening ribs.

[0010] Optionally or preferably, the inner steel pipe is rolled from a piece of steel plate, and a slot hole for mounting the inner steel pipe is reserved at the bottom.

[0011] Optionally or preferably, the outer steel pipe is formed by rolling two steel plates and splicing them end to end, and a slot hole for mounting the outer steel pipe and a slot hole for mounting the inner steel pipe are reserved at the bottom.

[0012] Optionally or preferably, the steel tube stiffening ribs include outer steel tube stiffening ribs and inner steel tube stiffening ribs; the outer steel tube stiffening ribs are connected and fixed to the side wall of the outer steel tube; the inner steel tube stiffening ribs are connected and fixed to the side wall of the inner steel tube; the outer steel tube stiffening ribs and the inner steel tube stiffening ribs are arranged in an array alternately with the axis as the center.

[0013] Optionally or preferably, the concrete is steel fiber concrete.

[0014] The present invention also provides a construction method for a flange-connected concrete-filled steel tube rod, based on the above-mentioned flange-connected concrete-filled steel tube rod, comprising the following steps:

[0015] S1. Roll and weld a steel plate into an inner steel pipe;

[0016] S2, pass the inner steel pipe stiffening rib through the inner steel pipe installation slot for positioning, and connect the inner steel pipe stiffening rib side to the inner steel pipe exterior by welding;

[0017] S3, connect the inner steel pipe and the bottom of the inner steel pipe stiffening rib to the upper surface of the flange through welding;

[0018] S4. Roll the two steel plates into a semicircular shape, pass the outer steel pipe stiffening rib through the outer steel pipe installation slot and weld it to the semicircular steel plate;

[0019] S5. Weld the two semicircular steel plates end to end to form an outer steel pipe;

[0020] S6. Weld the outer steel pipe and the bottom of the outer steel pipe stiffening rib to the flange respectively;

[0021] S7. Pour concrete between the inner steel pipe and the outer steel pipe to complete the component construction.

[0022] Based on the above technical solution, the flange-connected concrete-filled steel tube rod and construction method provided by the present invention can produce the following technical effects:

[0023] (1) The stiffening ribs in the present invention can effectively improve the local anti-buckling capacity of the outer steel pipe and the inner steel pipe, and improve the stability of the rod;

[0024] (2) The stiffening ribs are welded to the flange, inner steel pipe and outer steel pipe at the same time. When the component is subjected to stress, the load on the outer steel pipe can be transferred to the stiffening ribs, and then to the flange, so that the entire structure is subjected to stress in a coordinated manner, increasing the strength and stiffness of the flange node and the connection between the flange node and the rod body, and delaying the tearing damage of the steel pipe;

[0025] (3) The setting of annular stiffening ribs can reduce the influence of warping deformation of flange on bolt tension during bending and improve the bending bearing capacity of flange node;

[0026] (4) The flange-connected steel tube concrete rod provided by the present invention only needs to be prefabricated in the factory and does not need to be cast on site. It can be assembled on site, reducing construction time, improving construction efficiency, and ensuring project quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 It is a structural schematic diagram (stereoscopic diagram) of the present invention;

[0029] Figure 2 It is a schematic diagram of the internal structure of the flange node in the present invention;

[0030] Figure 3 It is a schematic diagram of the internal structure of the rod body in the present invention;

[0031] Figure 4 It is a structural schematic diagram (cross-sectional view) of the flange in the present invention;

[0032] Figure 5 It is a structural schematic diagram (cross-sectional view) of the inner steel pipe stiffening rib in the present invention;

[0033] Figure 6 It is a structural schematic diagram (cross-sectional view) of the outer and inner steel pipe stiffening ribs of the present invention;

[0034] In the figure: 1-flange node, 2-rod body, 3-flange plate, 4-steel pipe stiffening rib, 5-circumferential stiffening rib, 6-external steel pipe, 7-inner steel pipe, 8-external steel pipe stiffening rib, 9-inner steel pipe stiffening rib, 10-external steel pipe mounting slot, 11-inner steel pipe mounting slot, 12-concrete, 13-screw hole, 14-concrete pouring hole. DETAILED DESCRIPTION

[0035] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiment 1:

[0038] like Figure 1-Figure 3 As shown:

[0039] This embodiment provides a flange-connected concrete-filled steel tube rod. Figure 1 and Figure 4 As shown, it includes a flange node 1 and a rod body 2;

[0040] The flange nodes 1 are arranged at both ends of the rod body 2;

[0041] The flange node 1 includes a flange plate 3 and an annular stiffening rib 5; the annular stiffening rib 5 is installed and fixed on the flange plate 3 to provide support for the flange node 1;

[0042] Furthermore, if Figure 2 As shown, the annular stiffening rib 5 is arranged in an annular manner on one side of the flange 3 close to the rod body 1 with the axis as the center, and the annular stiffening rib 5 is arranged on the edge of the flange 1.

[0043] The rod body 2 includes an outer steel pipe 6, an inner steel pipe 7, steel pipe stiffening ribs and concrete 12; the outer steel pipe 6 is coaxially arranged with the inner steel pipe 7, and the outer steel pipe 6 is sleeved on the outside of the inner steel pipe 7; the steel pipe stiffening ribs are arranged between the outer steel pipe and the inner steel pipe, and the steel pipe stiffening ribs are fixedly connected to the outer steel pipe 6 and the inner steel pipe 7; the concrete 12 is filled between the outer steel pipe and the inner steel pipe.

[0044] In this embodiment, if Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the steel pipe stiffening ribs include outer steel pipe stiffening ribs 8 and inner steel pipe stiffening ribs 9; the outer steel pipe stiffening ribs 8 are not connected to the inner steel pipe 7; the inner steel pipe stiffening ribs 9 are connected and fixed to the side wall of the inner steel pipe 7; the outer steel pipe stiffening ribs 8 and the inner steel pipe stiffening ribs 9 are arranged in an array alternately with the axis as the center.

[0045] In this embodiment, the outer steel pipe 6 is formed by rolling two steel plates and splicing them end to end, and an outer steel pipe installation slot hole 10 and an inner steel pipe installation slot hole 11 are reserved at the end of the outer steel pipe 6 .

[0046] In this embodiment, the inner steel pipe is rolled from a steel plate, and a slot hole 11 for mounting the inner steel pipe is reserved at the bottom.

[0047] In this embodiment, the concrete 12 is steel fiber concrete. The steel fiber can effectively inhibit the expansion of concrete cracks, reduce stress concentration at the interface, and thus improve the bonding strength; optimize the transition zone between concrete and steel pipe, reduce pores and microcracks, and enhance the mechanical bite and friction of the interface.

[0048] This embodiment provides a construction method for a flange-connected concrete-filled steel tube rod, based on the above-mentioned flange-connected concrete-filled steel tube rod, comprising the following steps:

[0049] S1, rolling and welding a steel plate into an inner steel pipe 7;

[0050] S2, pass the inner steel pipe stiffening rib 9 through the inner steel pipe installation slot 11 for positioning, and connect the side of the inner steel pipe stiffening rib 9 to the outer part of the inner steel pipe 7 by welding;

[0051] S3, connecting the bottom of the inner steel pipe 7 and the inner steel pipe stiffening rib 9 to the upper surface of the flange 3 by welding;

[0052] S4, rolling the two steel plates into a semicircular shape, passing the outer steel pipe stiffening rib 8 through the outer steel pipe mounting slot 10 and welding them to the semicircular steel plate;

[0053] S5, welding the two semicircular steel plates end to end to form an outer steel pipe 6;

[0054] S6, welding the outer steel pipe 6 and the bottom of the outer steel pipe stiffening rib 8 to the flange 3 respectively;

[0055] S7, pouring concrete 12 between the inner steel pipe 7 and the outer steel pipe 6 to complete the component construction.

[0056] The structure, function and connection form disclosed in this article can be realized in other ways. For example, the above-described embodiments are only exemplary, for example, the outer steel pipe mounting slot and the inner steel pipe mounting slot can have other mounting methods, for example, multiple components can be combined or integrated into another component; in addition, each functional component in each embodiment of this article can be integrated into one functional component, or each functional component can exist physically separately, or two or more functional components can be integrated into one functional component.

[0057] The above is only a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art shall not deviate from the spirit and scope of the present invention, and shall be within the scope of protection of the claims attached to the present invention.

Claims

1. A flange-connected concrete-filled steel tube rod, characterized in that: Including flange node and rod body; The flange nodes are arranged at both ends of the rod body; The flange node includes a flange plate and annular stiffening ribs; the annular stiffening ribs are installed and fixed on the flange plate to provide support for the flange node; The rod body includes an outer steel pipe, an inner steel pipe, steel pipe stiffening ribs and concrete; the outer steel pipe is coaxially arranged with the inner steel pipe, and the outer steel pipe is sleeved outside the inner steel pipe; the steel pipe stiffening ribs are arranged between the outer steel pipe and the inner steel pipe, and the steel pipe stiffening ribs are fixedly connected to the outer steel pipe and the inner steel pipe; the concrete is filled between the outer steel pipe and the inner steel pipe.

2. The flange-connected concrete-filled steel tube rod according to claim 1, characterized in that: The annular stiffening ribs are arranged in an annular manner on one side of the flange close to the rod body with the axis as the center, and the annular stiffening ribs are arranged on the edge of the flange; the annular stiffening ribs are also fixedly connected to the steel pipe stiffening ribs.

3. The flange-connected concrete-filled steel tube rod according to claim 1, characterized in that: The inner steel pipe is rolled from a steel plate, and a slot hole for installing the inner steel pipe is reserved at the bottom.

4. The flange-connected concrete-filled steel tube rod according to claim 1, characterized in that: The outer steel pipe is formed by rolling two steel plates and splicing them end to end, and a slot hole for installing the outer steel pipe and a slot hole for installing the inner steel pipe are reserved at the bottom.

5. The flange-connected concrete-filled steel tube rod according to claim 1, characterized in that: The steel pipe stiffening ribs include outer steel pipe stiffening ribs and inner steel pipe stiffening ribs; the outer steel pipe stiffening ribs are connected and fixed on the side wall of the outer steel pipe; the inner steel pipe stiffening ribs are connected and fixed on the side wall of the inner steel pipe; the outer steel pipe stiffening ribs and the inner steel pipe stiffening ribs are arranged in an array alternately with the axis as the center.

6. The flange-connected concrete-filled steel tube rod according to claim 1, characterized in that: The concrete is steel fiber concrete.

7. A construction method for flange-connected concrete-filled steel tube rods, characterized in that: The flange-connected concrete-filled steel tube rod according to any one of claims 1 to 6 comprises the following steps: S1. Roll and weld a steel plate into an inner steel pipe; S2, pass the inner steel pipe stiffening rib through the inner steel pipe installation slot for positioning, and connect the inner steel pipe stiffening rib side to the inner steel pipe exterior by welding; S3, connect the inner steel pipe and the bottom of the inner steel pipe stiffening rib to the upper surface of the flange through welding; S4. Roll the two steel plates into a semicircular shape, pass the outer steel pipe stiffening rib through the outer steel pipe installation slot and weld it to the semicircular steel plate; S5. Weld the two semicircular steel plates end to end to form an outer steel pipe; S6. Weld the outer steel pipe and the bottom of the outer steel pipe stiffening rib to the flange respectively; S7. Pour concrete between the inner steel pipe and the outer steel pipe to complete the component construction.

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