An asymmetric T-shaped support system with few support points

Abstract

The present invention discloses an asymmetric T-shaped support system with few pivot points, including a T-shaped steel member and a parallel connection. The T-shaped steel member is the main load-bearing member of the support system, and is used to transfer the upper load to the lower support pile. The parallel connection is arranged above the T-shaped steel member, and the adjacent T-shaped steel members are connected to form a frame system. The steel column of the T-shaped steel member of the present invention can be reliably connected to the support pile, and is less constrained by the flatness of the ground and the bearing capacity of the foundation. The steel column and the crossbeam are integrally welded, and can be prefabricated in the factory, with good integrity, simple construction process, and short construction period. The adjacent T-shaped steel members are connected as a whole by the parallel connection, which improves the rigidity and stability of the system.

Description

Technical Field

[0001] The invention relates to the technical field of municipal formwork support construction, and in particular to an asymmetric T-shaped support system with few supporting points. Background Art

[0002] The construction of cast-in-place box girders in municipal bridge projects often requires the erection of supports along the ditch. Due to the terrain restrictions of the ditch, the ground height difference on both sides of the box girder along the center line is large. The traditional symmetrical support system is difficult to construct and uneconomical. At the same time, in order to meet the flood discharge requirements and environmental protection requirements of the city during the flood season, it is often forbidden to drive support piles in the ditch, so that the support erection space on the ditch side is contracted to the ditch side area, resulting in a small space below the support construction. The full-hall support makes full use of the upper space by setting up cantilever supports, reduces the dependence on the lower space, and provides temporary support for the construction of the upper box girder. However, this support system has high requirements for ground flatness and foundation bearing capacity, and is not suitable for the ditch side site environment. The steel column + cantilever platform system is widely used under the conditions of the ditch, but the platform and the lower steel column need to be constructed separately, the construction process is complicated, and the connection requires high precision control, which increases the construction period and cost. Summary of the invention

[0003] In order to overcome the technical defects of the traditional symmetrical support system in the prior art, such as being difficult to construct and uneconomical, the present invention provides an asymmetric T-shaped support system with few support points. The steel columns of the T-shaped steel members can be reliably connected to the support piles, and are less constrained by the flatness of the ground and the bearing capacity of the foundation. The steel columns and the crossbeams are welded as a whole, and adjacent T-shaped steel members are connected as a whole by flat joints, which improves the rigidity and stability of the system and solves the above-mentioned technical problems.

[0004] The present invention achieves the above-mentioned purpose through the following technical scheme: an asymmetric T-shaped support system with few support points, including a T-shaped steel member and a parallel joint. The T-shaped steel member is the main load-bearing member of the support system and is used to transfer the upper load to the lower support pile. The parallel joint is arranged above the T-shaped steel member to connect adjacent T-shaped steel members into a frame system.

[0005] The T-shaped steel member is a T-shaped structure welded by steel columns and corbels. The steel column includes a steel pipe column, a lower node plate of the steel pipe column, an upper transverse node plate of the steel pipe column, an upper longitudinal node plate of the steel pipe column, a head plate and a bottom flange. The steel pipe column is fixed to the lower support pile through the bottom flange to transfer the vertical load to the support pile. The interior of the steel pipe column is a hollow structure, which is sealed with a head plate after pouring concrete.

[0006] The corbel includes a first corbel large diagonal brace, a second corbel large diagonal brace, a first corbel small diagonal brace, a second corbel small diagonal brace, a node plate, a first corbel cross beam, a second corbel cross beam and a leveling block. The first corbel large diagonal brace, the second corbel large diagonal brace, the first corbel small diagonal brace, the second corbel small diagonal brace, the first corbel cross beam and the second corbel cross beam are all welded by double-jointed channel steel. The leveling block is a steel plate or steel section, which is welded to the upper ends of the first corbel cross beam and the second corbel cross beam. The first corbel large diagonal brace and the second corbel large diagonal brace are welded to the steel pipe column through the lower node plate of the steel pipe column to form a whole. The first corbel small diagonal brace, the second corbel small diagonal brace, the first corbel cross beam and the second corbel cross beam are welded to form a whole through the upper transverse node plate of the steel pipe column. The remaining diagonal braces are welded to each other through the node plate. The head plate of the steel column and the leveling block together form a support platform, and are at the same height.

[0007] The connection is composed of connection units, which include a left diagonal brace of the connection unit, a middle diagonal brace of the connection unit, a right diagonal brace of the connection unit, a rear cross beam of the connection unit, a front cross beam of the connection unit and a node plate of the connection unit. The diagonal brace and cross beam of the connection unit are made of channel steel. The left diagonal brace of the connection unit, the middle diagonal brace of the connection unit, the right diagonal brace of the connection unit and the front cross beam of the connection unit are welded together through the node plate of the connection unit. The left diagonal brace of the connection unit is connected to the rear cross beam of the connection unit through double-sided welding. The two ends of the rear cross beam of the connection unit and the front cross beam of the connection unit are respectively welded to the first corbel cross beam and the second corbel cross beam of the T-shaped steel member on both sides to form a whole.

[0008] In the above-mentioned asymmetric T-shaped support system with few support points, the first corbel beam and the second corbel beam can be cantilevered outward to expand the horizontal support distance of the cast-in-place concrete box beam support.

[0009] In general, compared with the prior art, the above technical scheme conceived by the present invention can achieve the following beneficial effects: the present invention is an asymmetric T-shaped support system with few support points, and the cantilevered part of the cross beam of the T-shaped steel member can replace the cantilever of the full-frame frame to improve the safety of the frame. The steel columns of the T-shaped steel member can be reliably connected to the support piles, and are less constrained by the flatness of the ground and the bearing capacity of the foundation. The steel columns and the cross beams are integrally welded and can be prefabricated in the factory. They have good integrity, simple construction technology, and a short construction period. Adjacent T-shaped steel members are connected as a whole by flat joints, which improves the rigidity and stability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0011] Figure 1 It is a schematic diagram of the overall structure of an asymmetric T-shaped support system with few pivot points according to the present invention;

[0012] Figure 2 It is a structural schematic diagram of the T-shaped steel member of the present invention;

[0013] Figure 3 It is a schematic diagram of the split structure of the steel column of the T-shaped steel member of the present invention;

[0014] Figure 4 It is a structural schematic diagram of the corbel of the T-shaped steel member of the present invention;

[0015] Figure 5 It is a structural schematic diagram of the parallel connection unit of the present invention;

[0016] Figure 6 This is a schematic diagram of the split structure of the parallel connection unit of the present invention;

[0017] In the figure: 1-T-shaped steel member, 2-parallel, 3-steel pipe column, 4-bottom node plate of steel pipe column, 5-upper transverse node plate of steel pipe column, 6-upper longitudinal node plate of steel pipe column, 7-head plate of steel pipe column, 8-bottom flange of steel pipe column, 9-large diagonal brace of first corbel, 10-large diagonal brace of second corbel, 11-small diagonal brace of first corbel, 12-small diagonal brace of second corbel, 13-node plate, 14-first corbel cross beam, 15-second corbel cross beam, 16-leveling block, 17-parallel unit, 18-left diagonal brace of parallel unit, 19-middle diagonal brace of parallel unit, 20-right diagonal brace of parallel unit, 21-rear cross beam of parallel unit, 22-front cross beam of parallel unit, 23-node plate of parallel unit. DETAILED DESCRIPTION

[0018] like Figure 1 As shown in FIG. 1 , it is a schematic diagram of the overall structure of an asymmetric T-shaped support system with few support points, including a T-shaped steel member 1 and a flat joint 2. The T-shaped steel member 1 is the main load-bearing member of the support system, which is used to transfer the upper load to the lower support pile. The flat joint 2 is arranged above the T-shaped steel member 1 to connect adjacent T-shaped steel members 1 into a frame system. Figure 2 , which is a schematic structural diagram of the T-shaped steel member 1 of the present invention, and is a T-shaped structure welded by steel columns and corbels.

[0019] like Figure 3 As shown, it is a schematic diagram of the disassembled structure of the steel column of the T-shaped steel member 1 of the present invention, including a steel pipe column 3, a lower node plate 4 of the steel pipe column, an upper transverse node plate 5 of the steel pipe column, an upper longitudinal node plate 6 of the steel pipe column, a head plate 7 and a bottom flange 8. The steel pipe column 3 is fixed to the lower support pile through the bottom flange 8 to transfer the vertical load to the support pile. The interior of the steel pipe column 3 is a hollow structure, which is sealed with a head plate 7 after pouring concrete.

[0020] like Figure 4As shown, it is a schematic diagram of the corbel structure of the T-shaped steel member 1 of the present invention, the corbel comprises a first corbel large diagonal brace 9, a second corbel large diagonal brace 10, a first corbel small diagonal brace 11, a second corbel small diagonal brace 12, a node plate 13, a first corbel cross beam 14, a second corbel cross beam 15 and a leveling block 16, the first corbel large diagonal brace 9, the second corbel large diagonal brace 10, the first corbel small diagonal brace 11, the second corbel small diagonal brace 12, the first corbel cross beam 14 and the second corbel cross beam 15 are all welded by double-jointed channel steel, the first corbel large diagonal brace 9 and The second corbel large diagonal brace 10 is welded into a whole with the steel pipe column 3 through the lower node plate 4 of the steel pipe column, the first corbel small diagonal brace 11, the second corbel small diagonal brace 12, the first corbel cross beam 14 and the second corbel cross beam 15 are welded into a whole through the upper transverse node plate 5 of the steel pipe column, and the remaining diagonal braces are welded together through the node plate 13. The leveling block 16 is a steel plate or steel section, which is welded to the upper ends of the first corbel cross beam 14 and the second corbel cross beam 15. The head plate 7 of the steel column and the leveling block 16 together form a supporting platform, and are at the same height.

[0021] The connection 2 is composed of a connection unit 21, such as Figure 5 and Figure 6 As shown, it is a schematic diagram of the structure and split structure of the flat unit 21 of the present invention, including a flat unit left diagonal brace 18, a flat unit middle diagonal brace 19, a flat unit right diagonal brace 20, a flat unit rear beam 21, a flat unit front beam 22 and a flat unit node plate 23. The diagonal braces and beams of the flat unit are made of channel steel. The flat unit left diagonal brace 18, the flat unit middle diagonal brace 19, the flat unit right diagonal brace 20 and the flat unit front beam 22 are welded together through the flat unit node plate 23. The flat unit left diagonal brace 18 is connected to the flat unit rear beam 21 by double-sided welding. The two ends of the flat unit rear beam 21 and the flat unit front beam 22 are respectively welded to the first corbel beam 14 and the second corbel beam 15 of the T-shaped steel member 1 on both sides to form a whole.

[0022] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An asymmetric T-shaped support system with few pivot points, characterized in that: It comprises a T-shaped steel member (1) and a parallel joint (2), wherein the T-shaped steel member (1) is the main load-bearing member of the support system and is used to transfer the upper load to the lower support pile, and the parallel joint (2) is arranged above the T-shaped steel member (1) to connect adjacent T-shaped steel members (1) to form a frame system; The T-shaped steel member (1) is a T-shaped structure formed by welding a steel column and a bracket. The steel column comprises a steel pipe column (3), a lower node plate (4) of the steel pipe column, an upper transverse node plate (5) of the steel pipe column, an upper longitudinal node plate (6) of the steel pipe column, a head plate (7) and a bottom flange (8). The steel pipe column (3) is fixed to the lower support pile through the bottom flange (8) to transfer the vertical load to the support pile. The interior of the steel pipe column (3) is a hollow structure, and after pouring concrete, a head plate (7) is used for sealing. The corbel comprises a first corbel large diagonal brace (9), a second corbel large diagonal brace (10), a first corbel small diagonal brace (11), a second corbel small diagonal brace (12), a node plate (13), a first corbel cross beam (14), a second corbel cross beam (15) and a leveling block (16); the first corbel large diagonal brace (9), the second corbel large diagonal brace (10), the first corbel small diagonal brace (11), the second corbel small diagonal brace (12), the first corbel cross beam (14) and the second corbel cross beam (15) are all welded by double-jointed channel steels; the leveling block (16) is a steel plate or a steel section, which is welded to the first corbel cross beam. The upper end of the beam (14) and the second corbel cross beam (15), the first corbel large diagonal brace (9) and the second corbel large diagonal brace (10) are welded to the steel pipe column (3) through the lower node plate (4) of the steel pipe column to form a whole, the first corbel small diagonal brace (11), the second corbel small diagonal brace (12), the first corbel cross beam (14) and the second corbel cross beam (15) are welded to form a whole through the upper transverse node plate (5) of the steel pipe column, and the remaining diagonal braces are welded to each other through the node plate (13), and the head plate (7) of the steel column and the leveling block (16) together form a support platform and are at the same height; The said flat joint (2) is composed of a flat joint unit (17), wherein the said flat joint unit (17) comprises a flat joint unit left diagonal brace (18), a flat joint unit middle diagonal brace (19), a flat joint unit right diagonal brace (20), a flat joint unit rear cross beam (21), a flat joint unit front cross beam (22) and a flat joint unit node plate (23), wherein the said flat joint unit diagonal brace and cross beam are made of channel steel, the said flat joint unit left diagonal brace (18), the flat joint unit middle diagonal brace (19), the flat joint unit right diagonal brace (20) and the flat joint unit front cross beam (22) are welded together through the flat joint unit node plate (23), the said flat joint unit left diagonal brace (18) is connected to the flat joint unit rear cross beam (21) by double-sided welding, and the two ends of the said flat joint unit rear cross beam (21) and the flat joint unit front cross beam (22) are respectively welded to the first bracket cross beam (14) and the second bracket cross beam (15) of the T-shaped steel member (1) by double-sided welding to form a whole.

2. The asymmetric T-shaped support system with few pivot points according to claim 1, characterized in that: The first corbel cross beam (14) and the second corbel cross beam (15) can be cantilevered outwards to expand the horizontal support distance of the cast-in-place concrete box beam support.

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