Aluminum alloy-high-strength steel combined steel column for rockfall passive net and mounting method

Abstract

The invention discloses an aluminum alloy-high-strength steel combined steel column for a rockfall passive net and a mounting method, and belongs to the technical field of slope rockfall protection. The combined steel column adopts a light corrosion-resistant aluminum alloy column body, and two ends of the combined steel column are respectively connected with a high-strength steel column head node and a high-strength steel column base node. The column head node is of a T-shaped symmetrical structure, and the additional bending moment caused by connection eccentricity is effectively reduced. A unique spherical hinge-like design is adopted for a column base node, through cooperation of a hemisphere with a plate, an eagle beak plate, a spherical hinge supporting plate and a bottom plate, the capacity of vertical deflection and limited transverse swing is achieved, and the self-locking and limiting functions are achieved. The problems that a traditional steel column is large in weight, poor in corrosion resistance, low in modularization degree, poor in column foot rotation performance and the like are effectively solved, the steel column has the advantages of being light in weight, convenient and fast to install, good in impact resistance, high in structural stability and the like, and the reliability and adaptability of a protection system are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slope protection and rockfall interception, and particularly relates to an aluminum alloy-high strength steel combined steel column for a rockfall passive net and a mounting method. BACKGROUND

[0002] Rockfall disaster is a common geological disaster in mountainous highway, railway and mining area environment, which has the characteristics of strong impact force, high uncertainty of movement path, and concentrated action point, etc., and puts forward very high requirements for the impact resistance of the protection system, especially the supporting structure. As an effective engineering measure to intercept such disasters, the passive flexible protection system has been widely used. In the system, the steel column as the core supporting component directly bears and transmits the impact load from the protection net, and the advantages and disadvantages of its structural performance fundamentally determine the stability, reliability and impact resistance of the entire protection system.

[0003] At present, most of the rockfall passive net columns used in engineering practice are pure steel structures. Although steel has the advantage of high strength, the problem of large structural self-weight is particularly prominent in dangerous mountainous areas or high slope environments, which brings great difficulties to the transportation, on-site hoisting and precise positioning of the components, significantly reducing the construction efficiency. In addition, steel is prone to corrosion in adverse environments such as rain, snow, freezing and salt spray, and must be protected by additional corrosion-resistant plating, increasing maintenance costs and workload. From the perspective of mechanical properties, the existing steel columns have insufficient lateral deflection unloading capacity due to their large inertia caused by large self-weight when subjected to rockfall impact, making it difficult to effectively avoid strong impact and prone to local crushing or connection failure.

[0004] The column head and column foot nodes in the prior art are mostly in the form of integral cast steel or welded structure. The integral cast steel is complex to process and has high cost; while the welded structure has problems such as material performance degradation in the heat-affected zone, residual stress, and local bearing strength calculation which is often difficult to pass. In particular, the common column head structure will produce a large additional bending moment when bearing the upward anchor rope tension, which deteriorates the stress state of the column, because the connection hole of the column head structure deviates from the neutral axis of the column. In terms of column foot, most existing designs use a simple pin shaft connection method, which has very limited lateral swing ability and lacks adaptability to deformation caused by impact load. A few designs that use ball hinge structure often have defects such as insufficient lateral limiting, complex structure leading to installation difficulties, or excessively high manufacturing cost, making it difficult to be widely applied in engineering. SUMMARY

[0005] The present application aims to overcome the above-mentioned defects and deficiencies in the prior art, and provides an aluminum alloy-high strength steel combined steel column for rockfall passive net. The combined steel column is designed by innovative structure and new material application, aiming to solve a series of engineering problems such as large self-weight, poor corrosion resistance, low modularization, large additional bending moment of column head, poor rotation performance of column foot and weak impact self-adaptive ability.

[0006] To solve the above technical problems, the technical scheme provided by the present application is: The present application provides an aluminum alloy-high strength steel combined steel column for rockfall passive net, comprising: an aluminum alloy column body, a high strength steel column head node, a high strength steel column foot node and a connecting piece. One end of the aluminum alloy column body is connected to the high strength steel column head node by bolts, and the other end is connected to the high strength steel column foot node by bolts. The high strength steel column foot node comprises a plate-equipped hemisphere, an eagle beak plate, a spherical hinge support plate and a bottom plate. The plate-equipped hemisphere is bolted to one end of the aluminum alloy column body. The eagle beak plate is fixedly arranged on the bottom plate. The spherical hinge support plate is arranged between the plate-equipped hemisphere and the bottom plate and connected to the bottom plate by bolts. The hemisphere part of the plate-equipped hemisphere is in contact with the support surface of the spherical hinge support plate, and the special-shaped support plate at the bottom of the plate-equipped hemisphere forms a Z-shaped contact self-locking connection with the eagle beak plate.

[0007] Further, the connecting piece comprises a shackle for connecting external anchor ropes or support ropes and a steel wire rope. Further, the aluminum alloy column body comprises a column body main body and column body end plates fixedly arranged at both ends of the column body main body. The column body end plate connected to the high strength steel column head node has a horizontal long axis, and the opening extension section is located on the left and right sides of the column body main body. The column body end plate connected to the high strength steel column foot node has a vertical long axis, and the opening extension section is located on the upper and lower sides of the column body main body.

[0008] Further, the high strength steel column head node is a T-shaped casting, and the wing plate part of the T-shaped casting is provided with two circular holes for connecting shackles arranged symmetrically about the central axis, and the hole distance is not greater than 100 mm.

[0009] Further, the half-sphere with plate includes a half-sphere part and a connecting plate part connected with the half-sphere part through a short circular tube; the connecting plate part is provided with a bolt hole; the minimum axial length of the short circular tube is configured to: when the combined steel column as a whole rotates downward with the center of the half-sphere part as the rotation center, the bolt connecting the half-sphere with plate and the end plate of the column body is in contact with the beak plate below, and the rotation angle reaches 10 degrees.

[0010] Further, the beak plate is welded to the bottom plate, has a beak head part protruding towards the column body, an upwardly arranged beak part, and a beak eye round hole for connecting a shackle or supporting a rope; the beak part of the beak plate forms a Z-type self-locking connection with the special-shaped supporting plate fixed at the bottom of the half-sphere part.

[0011] Further, a gap of 2mm is reserved between the beak part and the special-shaped supporting plate, and the gap is filled with aluminum sheets with a thickness of 2-3mm.

[0012] Further, the ball hinge supporting plate is provided with a half-sphere top cylindrical groove which is open on one side; the top of the groove is a spherical recess which is in close contact with the half-sphere part of the half-sphere with plate; two wedge-shaped transverse limiting plates are fixed on both sides of the groove, and the arc surface of the wedge-shaped transverse limiting plates is in close contact with the outside of the half-sphere part.

[0013] Further, the ball hinge supporting plate is provided with a bolt hole at the upper corner on the closed side of the groove; the bottom plate is provided with a non-through bolt hole with threads, and the ball hinge supporting plate is connected with the bottom plate through a bolt.

[0014] Further, the aluminum alloy column body is made of a work-hardened 5-series aluminum alloy material.

[0015] On the other hand, the present application also claims to protect an installation method of an aluminum alloy-high strength steel combined steel column for rockfall passive net, and the high strength steel column foot node is installed by a step-by-step mortise and tenon joint, which includes the following steps: Step one, firmly connecting the half-sphere with plate to the column body end plate of the aluminum alloy column body through a bolt; Step two, Z-type self-locking connecting the beak part which is an integrated component welded by the beak plate and the bottom plate with the special-shaped supporting plate at the bottom of the half-sphere with plate, forming preliminary positioning, and embedding aluminum sheets in the gap; Step three, inserting the groove open side of the ball hinge supporting plate into the half-sphere of the half-sphere with plate along the groove until the spherical recess at the top of the groove is completely in close contact with the half-sphere part, so as to tightly fit the Z-type self-locking connection and make the wedge-shaped transverse limiting plates form transverse constraint on the half-sphere; Step four, connecting the ball hinge supporting plate with the bottom plate through a bolt to complete the overall locking of the high strength steel column foot node.

[0016] Compared with the prior art, the present invention achieves the following beneficial technical effects: This application utilizes a structure combining lightweight aluminum alloy columns and high-strength steel nodes, significantly reducing overall weight, improving corrosion resistance, and facilitating transportation and installation. The modular column head and base design, connected by bolts, avoids welding challenges, improving production efficiency and localized load-bearing capacity. The optimized column head construction effectively reduces additional bending moments, while the ball-joint-like base enables controllable multi-directional rotation and self-locking restraint, significantly enhancing the structure's adaptive energy dissipation capacity, stability, and reliability under impact loads. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the aluminum alloy-high strength steel composite column used for rockfall passive netting in the embodiments of this application; Figure 2 This is an isometric view of the high-strength steel column head node in the embodiments of this application; Figure 3 This is a top view of the high-strength steel column head node in the embodiment of this application; Figure 4 This is a front view of the high-strength steel column head node in the embodiments of this application; Figure 5 This is an isometric view of the high-strength steel column base node in the embodiment of this application; Figure 6 This is a detailed view of the plate-enclosed hemispherical joint in the high-strength steel column base node in the embodiments of this application; Figure 7 This is a detailed view of the beak plate in the high-strength steel column base node in the embodiments of this application; Figure 8 This is a detailed view of the ball joint support plate in the high-strength steel column base node in the embodiments of this application; Figure 9 This is a top view of the high-strength steel column base node in the embodiment of this application; Figure 10 This is a front view of the high-strength steel column base node in the embodiments of this application; The reference numerals used in this application include: aluminum alloy column body 1, column body 11, column end plate 12, high-strength steel column head node 2, high-strength steel column foot node 3, plated hemisphere 31, beak plate 32, ball hinge support plate 33, base plate 34, connector 4, bolt 41, shackle 42, and wire rope 43. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, this invention provides an aluminum alloy-high-strength steel composite column for rockfall passive netting. The composite column mainly consists of an aluminum alloy column body 1, a high-strength steel column head node 2, a high-strength steel column base node 3, and connectors 4. One end of the aluminum alloy column body 1 is connected to the high-strength steel column head node 2 by bolts, and the other end is also connected to the high-strength steel column base node 3 by bolts. This connection method not only facilitates installation and disassembly but also ensures the connection strength between the components.

[0021] The high-strength steel column base node 3 is an important component of this composite steel column, comprising a plated hemisphere 31, a beak plate 32, a spherical hinge support plate 33, and a base plate 34. The plated hemisphere 31 is bolted to one end of the aluminum alloy column body 1 to ensure a stable connection. The beak plate 32 is fixedly mounted on the base plate 34, providing support and limiting for the entire column base node. The spherical hinge support plate 33 is positioned between the plated hemisphere 31 and the base plate 34 and is bolted to the base plate 34, serving to connect and support the plated hemisphere 31. The hemispherical portion of the plated hemisphere 31 contacts and engages with the support surface of the spherical hinge support plate 33. This engagement allows the plated hemisphere 31 to rotate flexibly within a certain range. Simultaneously, the irregularly shaped support plate at the bottom of the plated hemisphere 31 forms a Z-shaped self-locking connection with the beak plate 32. This self-locking connection structure provides effective constraint when the steel column is subjected to external forces, ensuring the stability of the steel column.

[0022] The aluminum alloy column body 1 includes a column body 11 and column end plates 12 fixedly installed at both ends of the column body 11. The column end plates 12 connected to the high-strength steel column head nodes 2 have their long axis arranged laterally, with open extension sections located on the left and right sides of the column body 11; while the column end plates 12 connected to the high-strength steel column foot nodes 3 have their long axis arranged vertically, with open extension sections located on the upper and lower sides of the column body 11. This structural design better adapts to the connection requirements of different nodes.

[0023] The high-strength steel column head node 2 is a T-shaped casting. The flange of the T-shaped casting has two circular holes arranged symmetrically along the central axis. These circular holes are used to connect the shackle 42.

[0024] The plated hemisphere 31 includes a hemisphere and a connecting plate that is connected to the hemisphere via a short circular tube. The connecting plate has bolt holes for easy connection with other components. The axial length of the short circular tube is specifically configured to meet the rotation requirements of the steel column under certain conditions.

[0025] The beak plate 32 is welded to the base plate 34. It has an eagle head protruding towards the column, an upward-facing beak, and an eagle eye hole for connecting the shackle 42 or the support rope. The beak of the beak plate 32 forms a self-locking Z-shaped contact with the irregular support plate fixed to the bottom of the hemisphere.

[0026] A certain gap is reserved between the beak part and the irregular support plate, and the gap is filled with aluminum sheets.

[0027] The ball joint support plate 33 is provided with a single-sided open hemispherical cylindrical groove; the top of the groove is a spherical recess that fits against the hemispherical part of the plate hemispherical 31; two wedge-shaped transverse limiting plates are fixedly arranged on both sides of the groove, and the arc-shaped surface of the wedge-shaped transverse limiting plates fits against the outside of the hemispherical part.

[0028] The ball joint support plate 33 has bolt holes at the upper corner of the groove closed side, and the base plate 34 has non-through threaded bolt holes. The ball joint support plate 33 is connected to the base plate 34 by bolts.

[0029] The connector 4 includes a shackle 42 for connecting an external anchor rope or support rope and a wire rope 43.

[0030] The aluminum alloy column body 1 is made of work-hardened 5-series aluminum alloy material.

[0031] This invention also relates to an installation method for the aluminum alloy-high-strength steel composite steel column used in the above-mentioned rockfall passive netting. In this installation method, the high-strength steel column base node 3 adopts a step-by-step tenon and mortise joint installation, specifically including the following steps: Step 1: Securely connect the plated hemisphere 31 to the column end plate 12 of the aluminum alloy column body 1 using bolts; Step 2: The beak part, which is welded and fixed as an integrated component by the beak plate 32 and the base plate 34, is connected to the irregular support plate at the bottom of the plate hemisphere 31 by a Z-shaped self-locking connection to form a preliminary positioning, and aluminum sheets are embedded in the gap. Step 3: Place the open side of the groove of the ball hinge support plate 33 against the hemisphere of the plate hemisphere 31 and insert it downward along the groove until the spherical recess at the top of the groove is completely against the hemisphere, so that the Z-type self-locking connection is tightly fitted and the wedge-shaped lateral limiting plate forms a lateral constraint on the hemisphere. Step four: Connect the ball hinge support plate 33 to the base plate 34 with bolts to complete the overall locking of the high-strength steel column foot node 3.

[0032] An embodiment of this application is described below: like Figures 2-10 As shown, this embodiment provides an aluminum alloy-high strength steel composite steel column for a rockfall passive net, including: an aluminum alloy column body 1, high strength steel column head nodes 2 and high strength steel column foot nodes 3 disposed at both ends of the column body, and a connector 4.

[0033] The aluminum alloy column body 1 is preferably made of work-hardened 5-series aluminum alloy, which is lightweight, highly corrosion-resistant, and ductile. Its excellent deflection capability upon impact is a result of the combined effect of the low inertia of the lightweight column body and the rotational capacity of the column base. Compared to traditional steel columns, the density of the aluminum alloy column is significantly reduced, approximately one-third that of steel. This characteristic greatly reduces the structural weight, improving installation efficiency and ease of construction. Column end plates 12 are provided at both ends of the column body, each with bolt holes for easy connection to the high-strength steel column head node 2 and the high-strength steel column base node 3. Specifically, the column end plate 12 connecting to the column head has its long axis arranged laterally, with the extended openings located on the left and right sides of the column body 11; the column end plate 12 connecting to the column base has its long axis arranged vertically, with the extended openings located on the upper and lower sides of the column body 11.

[0034] The high-strength steel column head node 2 and high-strength steel column base node 3 adopt a modular design, which facilitates transportation, installation and large-scale production. They are fixedly connected to the column end plate 12 of the aluminum alloy column body 1 by bolt connection. This design avoids the process difficulties caused by aluminum alloy welding, and at the same time effectively solves the problem that it is difficult to pass the local bearing pressure verification of the column head and column base.

[0035] The high-strength steel column head node 2 has a simple structure, consisting of a T-shaped casting with round holes. Its front end has two round holes symmetrically arranged along a central axis, with a hole spacing of no more than 100mm. This design aims to reduce the additional bending moment caused by eccentric force distribution. The round holes are used to connect shackles 42. The upper shackle 42 connects two symmetrically arranged upper anchor ropes to achieve upward anchoring of the column head, thereby enhancing the overall structural stability and tensile strength. The lower shackle 42 connects the main support rope, ensuring that the tensile force generated by the protective net when subjected to rockfall impact can be efficiently transferred to the column, thus guaranteeing the overall force continuity and energy dissipation capacity of the protective system.

[0036] The high-strength steel column base node 3 adopts a ball-joint-like connection structure, mainly including a plated hemisphere 31, a beak plate 32, a ball-joint support plate 33, and a base plate 34. The plated hemisphere 31 has bolt holes on a plate flush with the column end plate 12. A short circular tube is provided at the transition between the perforated plate and the hemisphere. The minimum axial length of this short circular tube is determined according to the following principle: when the entire steel column rotates downwards around the center of the hemisphere, causing the connecting bolt 41 to contact the beak plate 32 below, the rotation angle should reach 10 degrees to ensure sufficient vertical rotation capacity of the node. Simultaneously, a special-shaped support plate is welded to the bottom of the hemisphere.

[0037] The eagle beak plate 32 is shaped like an eagle beak and welded to the base plate 34. Its "eagle head" faces the column, the "eagle beak" is upward-facing, and the "eagle eye" is a round hole for connecting the shackle 42 or support rope. The "eagle beak" portion of the eagle beak plate 32, together with the irregularly shaped support plate at the bottom of the plated hemisphere 31, forms a Z-shaped contact self-locking connection. A gap of approximately 2 mm is reserved between the two, providing necessary space for the steel column to rotate horizontally and avoiding restricted rotation. This gap can be filled with 2-3 mm thick aluminum sheets. This filling treatment makes the mortise and tenon connection after the column foot is inserted into the base more secure. Because aluminum is relatively soft, it will not form a rigid obstacle during the later rotation of the column, thus ensuring connection stability without affecting the rotational performance of the structure, and providing reliable vertical support and axial tensile restraint for the steel column.

[0038] The main body of the ball joint support plate 33 has a one-sided open hemispherical cylindrical groove (or capsule-shaped groove). The hemispherical part of the plate hemisphere 31 fits against the spherical recess at the top of the groove. Lubricant should be applied to the contact interface to enhance rotational capacity, thereby enabling flexible deformation of the structure to adapt to changes in force. Two wedge-shaped lateral limiting plates are welded to both sides of the groove. The arc-shaped surface of the wedge-shaped lateral limiting plates fits against the outside of the hemisphere, effectively preventing excessive displacement and improving the safety of the joint. Bolt holes are opened at the upper left and upper right corners of the ball joint support plate 33. These bolt holes are located on the closed side of the one-way open groove.

[0039] The base plate 34 has non-through threaded bolt holes flush with the opening in the ball joint support plate 33. The ball joint support plate 33 is connected to the base plate 34 by bolts 41. All loads borne by the high-strength steel column base node 3 are ultimately transferred to the foundation through the base plate 34.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An aluminum alloy-high strength steel combined steel column for rockfall passive net, characterized by, The utility model relates to a combined steel column, which comprises an aluminum alloy column body (1), a high-strength steel column head node (2), a high-strength steel column foot node (3) and a connecting piece (4). One end of the aluminum alloy column body (1) is connected to the high-strength steel column head node (2) by bolts, and the other end is connected to the high-strength steel column foot node (3) by bolts. The high-strength steel column foot node (3) comprises a plate-equipped hemisphere (31), an eagle beak plate (32), a spherical hinge support plate (33) and a bottom plate (34). The plate-equipped hemisphere (31) is bolted to one end of the aluminum alloy column body (1). The eagle beak plate (32) is fixedly arranged on the bottom plate (34). The spherical hinge support plate (33) is arranged between the plate-equipped hemisphere (31) and the bottom plate (34) and is connected to the bottom plate (34) by bolts. The spherical surface of the plate-equipped hemisphere (31) is in contact with the support surface of the spherical hinge support plate (33), and the special-shaped support plate at the bottom of the plate-equipped hemisphere (31) forms a Z-shaped contact self-locking connection with the eagle beak plate (32). The connecting piece (4) comprises a thimble (42) and a steel wire rope (43) for connecting external anchor ropes or support ropes.

2. The composite steel column according to claim 1, wherein The aluminum alloy column body (1) comprises a column body main body (11) and column body end plates (12) fixedly arranged at both ends of the column body main body (11).

3. The composite steel column according to claim 2, wherein, The column body end plate (12) connected to the high-strength steel column head node (2) has a horizontal long axis and hole extension sections on the left and right sides of the column body main body (11). The column body end plate (12) connected to the high-strength steel column foot node (3) has a vertical long axis and hole extension sections on the upper and lower sides of the column body main body (11). The high-strength steel column head node (2) is a T-shaped casting, and the wing plate part of the T-shaped casting is provided with two circular holes arranged symmetrically about the center axis and used for connecting the thimble (42), and the hole distance is not greater than 100 mm.

4. The composite steel column according to claim 2, wherein The plate-equipped hemisphere (31) comprises a spherical part and a connecting plate part connected to the spherical part by a short circular tube; the connecting plate part is provided with bolt holes; the minimum axial length of the short circular tube is configured such that, when the combined steel column is rotated downward with the spherical center of the plate-equipped hemisphere (31) as the rotation center, the bolt connecting the plate-equipped hemisphere (31) and the column body end plate (12) comes into contact with the eagle beak plate (32) below, and the rotation angle reaches 10 degrees.

5. The composite steel column according to claim 3, wherein The eagle beak plate (32) is welded to the bottom plate (34) and has an eagle head part protruding toward the column body, an eagle beak part arranged upward and an eagle eye circular hole used for connecting the thimble (42) or the support rope; the eagle beak part of the eagle beak plate (32) forms a Z-shaped contact self-locking connection with the special-shaped support plate fixed at the bottom of the spherical part.

6. The composite steel column according to claim 5, wherein, A gap of 2 mm is reserved between the eagle beak part and the special-shaped support plate, and the gap is filled with aluminum sheets with a thickness of 2-3 mm.

7. The composite steel column according to claim 6, wherein ​ 8. The composite steel column according to claim 6, wherein The ball hinge supporting plate (33) is provided with a half-sphere top cylinder groove which is open on one side; the top of the groove is a spherical recess which is fitted with the half-sphere part of the plate half-sphere (31); two wedge-shaped transverse limiting plates are fixedly arranged on both sides of the groove, and the arc surface of the wedge-shaped transverse limiting plate is fitted with the outside of the half-sphere part.

9. The composite steel column according to claim 8, wherein, The ball hinge supporting plate (33) is provided with a bolt hole in the upper corner on the closed side of the groove; the bottom plate (34) is provided with a non-through bolt hole with a thread, and the ball hinge supporting plate (33) is connected with the bottom plate (34) through a bolt.

10. The composite steel column according to claim 1, wherein The aluminum alloy column body (1) is made of a work-hardened 5-series aluminum alloy material.

11. A method of installing an aluminum alloy-high strength steel composite column for a rockfall passive net as claimed in claim 8, characterized in that, The high-strength steel column foot node (3) is installed in a step-by-step mortise and tenon manner, including the following steps: Step one, firmly connecting the plate half-sphere (31) to the column body end plate (12) of the aluminum alloy column body (1) through a bolt; Step two, Z-type self-locking the eagle beak part which is an integrated component formed by welding the eagle beak plate (32) and the bottom plate (34) to the special-shaped supporting plate at the bottom of the plate half-sphere (31), forming preliminary positioning, and inserting an aluminum sheet in the gap; Step three, fitting the groove open side of the ball hinge supporting plate (33) with the half-sphere of the plate half-sphere (31) and inserting it downward along the groove until the spherical recess at the top of the groove is completely fitted with the half-sphere part, making the Z-type self-locking connection compact, and making the wedge-shaped transverse limiting plate form a transverse constraint on the half-sphere; Step four, connecting the ball hinge supporting plate (33) with the bottom plate (34) through a bolt to complete the overall locking of the high-strength steel column foot node (3).

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