An assembled suspension bridge tower

Abstract

The present invention is an assembled suspension bridge tower, comprising a bridge tower foundation, a steel crossbeam, and one or more prefabricated cylinder segments. The bridge tower foundation and the prefabricated cylinder segments are fixedly connected by means of bottom anchor bolts arranged on the bridge tower foundation. Adjacent prefabricated cylinder segments are fixedly connected by reinforcing rings and bolts. That is to say, reinforcing rings are arranged between the upper and lower layers of the prefabricated steel tube concrete column and the steel plate concrete combined cylinder segment. The reinforcing rings are bolted to fix the upper and lower steel tube concrete and steel plate concrete combined cylinder segments. The prefabricated cylinder segments are assembled and connected with steel crossbeams to form a bridge tower. The present invention can make full use of the good tensile and bending properties of steel materials, the good compressive properties of concrete, and the steel components constrain the lateral displacement of concrete, so that the concrete is in a three-dimensional compressive state; all components used can be prefabricated in a factory and transported to the construction site for assembly. The construction site has low work intensity and less material storage space, which is conducive to protecting the construction site environment.

Description

Technical Field

[0001] The invention belongs to the field of bridge engineering, and specifically relates to an assembled suspension bridge tower and a construction method thereof. Background Art

[0002] At present, most of the bridges in my country are composed of reinforced concrete abutments, cast-in-place concrete piers, cast-in-place concrete bridge decks and precast concrete beams. Cast-in-place concrete has the disadvantages of heavy weight, long construction time, serious energy consumption, and troublesome transportation and construction processes. Steel tube concrete is a pressure-bearing member of the bridge. During construction, the hollow steel tube not only has the functions of formwork and steel bars, but also has the advantages of large rigidity of the hollow steel tube skeleton after processing, high bearing capacity, light weight and easy transportation. Summary of the invention

[0003] In order to solve the above problems, the present invention provides an assembled suspension bridge tower and a construction method thereof.

[0004] In order to achieve the above object, the present invention is achieved through the following technical solutions:

[0005] The present invention is an assembled suspension bridge tower, comprising a bridge tower foundation, a steel crossbeam, and one or more prefabricated cylinder segments. The bridge tower foundation and the prefabricated cylinder segments are fixedly connected by means of bottom anchor bolts arranged on the bridge tower foundation, and adjacent prefabricated cylinder segments are fixedly connected by reinforcement rings and bolts, that is, reinforcement rings are arranged between the upper and lower layers of the prefabricated steel tube concrete column and steel plate concrete combined cylinder segments, and the reinforcement rings are used to fix the upper and lower steel tube concrete and steel plate concrete combined cylinder segments with bolts. The prefabricated cylinder segments are assembled and connected with steel crossbeams to form a bridge tower.

[0006] A further improvement of the present invention is that the prefabricated cylinder segment includes a steel tube concrete column, a steel beam, a double-walled steel plate with concrete poured in the middle, and a plurality of shear connectors, the shear connectors are all fixed on the inner wall of the double-walled steel plate, the foundation pad steel plate is arranged at the bottom of the steel tube concrete column, the area of ​​the foundation pad steel plate is larger than the cross-sectional area of ​​the steel tube concrete column, and connection holes are arranged on the foundation pad steel plate outside the projection area of ​​the steel tube concrete column body corresponding to the bottom anchor bolts.

[0007] A further improvement of the present invention is that the shear-resistant connectors are all studs, the tips of the studs are welded to the double-walled steel plates, and the studs are arranged in a staggered manner.

[0008] A further improvement of the present invention is that the shear-resistant connectors are all stiffening ribs, the stiffening ribs are welded parallel to the direction of the double-wall steel plates, and the stiffening ribs are arranged in a staggered manner.

[0009] A further improvement of the present invention is that the steel beams are all honeycomb steel beams, a plurality of holes with equal spacing are arranged on the web of the honeycomb steel beams, and the upper and lower staggered overlaps of the honeycomb steel beams are fixed with high-strength bolts.

[0010] A further improvement of the present invention is that a perforated strip steel plate is arranged between the steel beam and the reinforcement ring, and the perforated strip steel plate is connected to the reinforcement ring and the steel beam by bolts.

[0011] A further improvement of the present invention is that the steel beam is a honeycomb beam, the hole shape of the honeycomb beam can be circular, square or elliptical, the upper and lower parts of the honeycomb beam are staggered and overlapped, the web with holes on the edge of the honeycomb beam extends into the steel tube concrete reinforcement ring, and is fixed to the perforated strip steel plate in the reinforcement ring with bolts, and the perforated strip steel plate is staggered in the opposite direction.

[0012] A further improvement of the present invention is that if the cross section of the upper prefabricated cylinder segment is smaller than that of the lower prefabricated cylinder segment, the steel tube concrete column of the upper prefabricated cylinder segment is inserted into the steel tube concrete column of the lower prefabricated cylinder segment and poured with concrete to fill it.

[0013] A further improvement of the present invention is that the steel cross beams connecting the cylinder segments on both sides of the bridge tower are box beams, honeycomb beams or trusses.

[0014] A further improvement of the present invention is that the cross section of the prefabricated steel tube concrete column is square, circular or elliptical, the reinforcing ring is square or circular, and the upper and lower prefabricated cylinder segments are fixed with high-strength bolts when assembled.

[0015] The beneficial effects of the present invention are as follows: (1) The present invention can give full play to the material properties. Since the design takes into account the joint work of steel pipes and concrete, steel plates and concrete, the present invention can make full use of the good tensile and bending properties of steel, while concrete has good compressive properties. Steel components constrain the lateral displacement of concrete, so that concrete is in a three-dimensional compressive state; this design gives full play to the advantages of the combination of the two; (2) The present invention reduces the deadweight of the structure. The cylindrical structure composed of steel tube concrete columns and steel plate concrete can reduce the deadweight of the structure compared to the reinforced concrete structure, and the bearing capacity is improved; (3) The present invention is easy to construct and saves construction time. All components used can be prefabricated in the factory and transported to the construction site for assembly. The construction site has low work intensity, short construction period, low noise, and less material storage space, which is conducive to protecting the construction site environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the bridge tower of the present invention.

[0017] Figure 2 It is a schematic cross-sectional view of the bridge tower of the present invention.

[0018] Figure 3 It is a structural schematic diagram of the main tower of the present invention.

[0019] Figure 4 It is a schematic diagram of the cross section of the cylinder of the main tower of the present invention.

[0020] Figure 5 It is a schematic diagram of a double-wall steel plate when the shear-resistant connector of the present invention is a stud 9.

[0021] Figure 6 It is a schematic diagram of the connection of the upper and lower steel beams in the cylinder of the present invention.

[0022] Figure 7 It is a schematic diagram of the connection of the upper and lower reinforcing rings in the cylinder of the present invention.

[0023] Figure 8 It is a schematic diagram of the high-strength bolt of the present invention.

[0024] Fig. 9 It is a schematic diagram of the connection between the upper and lower cylinders of the present invention.

[0025] Fig.10 It is a schematic diagram of the upper and lower connection mode of the bridge tower of the present invention.

[0026] Fig.11 It is a schematic diagram of a double-wall steel plate when the shear-resistant connector of the present invention is a stiffening rib 11.

[0027] Among them: 1-bridge tower foundation; 2-prefabricated cylinder segment; 3-steel crossbeam; 4-foundation pad steel plate; 5-bottom anchor bolt; 6-steel tube concrete column; 7-double-wall steel plate; 8-reinforcement ring; 9-steel beam; 10-stud; 11-stiffening rib; 12-perforated strip steel plate; 13-high-strength bolt; 14-bolt hole; 15-bottom steel plate. DETAILED DESCRIPTION

[0028] The following will disclose the embodiments of the present invention with drawings. For the purpose of clear description, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be depicted in a simple schematic manner in the drawings.

[0029] like Figure 1-11As shown, the present invention is an assembled suspension bridge tower, comprising from bottom to top a bridge tower foundation 1, a steel crossbeam 3, and one or more prefabricated steel tube concrete column and steel plate concrete combined prefabricated cylinder segments 2, the bridge tower foundation 1 and the prefabricated cylinder segments 2 are fixedly connected by means of bottom anchor bolts 5 arranged on the bridge tower foundation 1, and two adjacent prefabricated cylinder segments 2 are fixedly connected by reinforcing rings 8 and bolts, that is, reinforcing rings are arranged between the upper and lower layers of the prefabricated steel tube concrete column and the steel plate concrete combined cylinder segment, and the reinforcing rings are bolted to fix the upper and lower steel tube concrete and steel plate The concrete composite cylinder segment is assembled with the prefabricated cylinder segment 2 and connected with the steel cross beam 3 to form a bridge tower. The prefabricated cylinder segment 2 includes a steel tube concrete column 6, a steel beam 9, a double-walled steel plate 7 with concrete poured in the middle, and a plurality of shear connectors. The shear connectors are all fixed on the inner wall of the double-walled steel plate 7. The foundation pad steel plate 4 is arranged at the bottom of the steel tube concrete column 6. The area of ​​the foundation pad steel plate 4 is larger than the cross-sectional area of ​​the steel tube concrete column 6. A connection hole is arranged on the foundation pad steel plate 4 outside the main projection area of ​​the steel tube concrete column 6 corresponding to the bottom anchor bolt 5, such as Figure 5 and Fig.11 As shown, the shear connectors are all studs 10, the nail tips of the studs 10 are welded to the double-walled steel plates 7, and the studs 10 are arranged in a staggered manner, or the shear connectors are all stiffening ribs 11, and the stiffening ribs 11 are welded parallel to the direction of the double-walled steel plates 7, and the stiffening ribs 11 are arranged in a staggered manner, such as Figure 6-9 As shown, the steel beams 9 are all honeycomb steel beams, and a plurality of equally spaced holes are arranged at the web of the honeycomb steel beams. The upper and lower staggered overlaps of the honeycomb steel beams are fixed with high-strength bolts 13. A perforated strip steel plate 12 is arranged between the steel beam 9 and the reinforcement ring 8. The perforated strip steel plate 12 connects the reinforcement ring 8 and the steel beam 9 with bolts. The steel beam 9 is a honeycomb beam, and the hole shape of the honeycomb beam can be circular, square or elliptical. The upper and lower parts of the honeycomb beam are staggered overlapped. The perforated web at the edge of the honeycomb beam extends into the steel tube concrete reinforcement ring 8 and is fixed with the perforated strip steel plate 12 in the reinforcement ring 8 with bolts. The perforated strip steel plates 12 are arranged in an opposite direction. The cross section of the upper prefabricated cylinder segment 2 is smaller than that of the lower prefabricated cylinder segment 2. The steel tube concrete column of the upper prefabricated cylinder segment 2 is inserted into the steel tube concrete column of the lower prefabricated cylinder segment 2, and poured with concrete to fill it. The steel cross beam 3 connects the cylinder segments on both sides of the bridge tower, which is a box beam, honeycomb beam or truss, etc. The cross section of the prefabricated steel tube concrete column 6 is square, round or elliptical, and the reinforcement ring 8 is square or round. The upper and lower prefabricated cylinder segments 2 are fixed with high-strength bolts when assembled.

[0030] The manufacturing method of each component of the assembled suspension bridge tower in this embodiment is as follows: Figure 1 As shown, the following steps are included:

[0031] (1) Fabrication of the bottom segment of the steel tube concrete column and steel plate concrete composite cylinder: Fabricate the steel tube 6 according to the design requirements and weld the steel tube 6 to the foundation pad steel plate 4; weld the reinforcing ring 8 to the upper and lower ends of the column and connect them to the steel beam 9 through high-strength bolts 13; weld the double-walled steel plate 7 to the steel tube 6 and the steel beam 9, weld the internal shear connector into studs 10 or stiffening ribs 11, and pour concrete inside to form a cylinder segment;

[0032] (2) Making the middle section of the steel tube concrete and steel plate concrete composite cylinder: Make the steel tube 6 according to the design requirements, weld the reinforcement ring 8 to the upper and lower ends of the column, and connect it to the steel beam 9 through high-strength bolts 13; weld the double-walled steel plate 7 to the steel tube 6 and the steel beam 9, weld the shear connector inside, arrange them in a staggered manner, and pour concrete inside to form a cylinder section;

[0033] (3) Pre-embed bottom anchor bolts 5 on the foundation 1 of the bridge tower;

[0034] (4) Fixing the prefabricated cylinder segment 2 on the bridge tower foundation 1 by means of pre-buried bottom anchor bolts 5;

[0035] (5) Connecting the upper and lower prefabricated cylinder segments: The upper and lower steel tube concrete columns are connected by reinforcing rings 8 and fixed with high-strength bolts 13; the steel beam 9 is a honeycomb beam with holes opened at the web position, staggered overlapped at the upper and lower positions, and fixed with high-strength bolts 13;

[0036] (6) Inject concrete from top to bottom through the top of the steel tube concrete column;

[0037] (7) Steel beams 3 connect the prefabricated cylinder segments 2 of the main towers on both sides;

[0038] (8) Connecting the upper and lower main towers with different cross-sectional areas: weld a bottom plate 15 at the bottom of the upper steel pipe column, insert it into the lower steel pipe column, and pour concrete to fill it.

[0039] For ordinary technicians in this field, the specific embodiments are only illustrative descriptions of the present invention. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concepts and technical solutions of the present invention, or the concepts and technical solutions of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. An assembled suspension bridge tower, comprising a tower foundation (1), a steel crossbeam (3), and one or more prefabricated cylinder segments (2), wherein the tower foundation (1) and the prefabricated cylinder segments (2) are fixedly connected by means of bottom anchor bolts (5) arranged on the tower foundation (1), and two adjacent upper and lower prefabricated cylinder segments (2) are fixedly connected by means of reinforcing rings (8) and bolts, and the prefabricated cylinder segments (2) are assembled and connected with the steel crossbeam (3) to form a tower, wherein the prefabricated cylinder segments (2) comprise steel tube concrete columns (6), steel beams (9), double-walled steel plates (7) with concrete poured in the middle, and a plurality of shear connectors, wherein the shear connectors are all fixed to the inner wall of the double-walled steel plates (7), and the steel tubes of the steel tube concrete columns (6) are welded to the left and right sides of the double-walled steel plates (7), and the prefabricated cylinder segments (2) are ) is divided into a bottom segment and an intermediate segment, the foundation pad steel plate (4) is arranged at the bottom of the steel tube concrete column (6) of the bottom segment, the reinforcement ring (8) is welded to the upper end of the steel tube of the bottom segment and the upper and lower ends of the steel tube of the intermediate segment, the reinforcement ring (8) is connected to the steel beam (9) by high-strength bolts, the double-wall steel plate (7) is welded to the steel tube of the steel tube concrete column (6) and the steel beam (9), the steel beam (9) is a honeycomb beam, and a plurality of holes with equal spacing are arranged on the web of the honeycomb beam. When assembled, the honeycomb beam is staggered and overlapped up and down and fixed with high-strength bolts, the steel beam (9) and the reinforcement ring (8) are provided with a perforated strip steel plate (12), the perforated web of the honeycomb beam edge extends into the reinforcement ring (8) and is fixed to the perforated strip steel plate (12) in the reinforcement ring (8) by bolts, and the perforated strip steel plate (12) is staggered in the opposite direction.

2. The assembled suspension bridge tower according to claim 1, characterized in that: The shear-resistant connectors are all studs (10), the tips of the studs (10) are welded to the double-walled steel plates (7), and the studs (10) are arranged in a staggered manner.

3. The assembled suspension bridge tower according to claim 1, characterized in that: The shear-resistant connectors are all stiffening ribs (11), the stiffening ribs (11) are welded parallel to the direction of the double-walled steel plates (7), and the stiffening ribs (11) are arranged in a staggered manner.

4. The assembled suspension bridge tower according to claim 1, characterized in that: If the cross-section of the upper prefabricated cylinder segment (2) is smaller than that of the lower prefabricated cylinder segment (2), the steel tube concrete column of the upper prefabricated cylinder segment (2) is inserted into the steel tube concrete column of the lower prefabricated cylinder segment (2) and poured with concrete to fill the gap.

5. The assembled suspension bridge tower according to claim 1, characterized in that: The steel cross beam (3) connects the cylinder segments on both sides of the bridge tower and is a type of box beam, honeycomb beam or truss.

6. The assembled suspension bridge tower according to claim 1, characterized in that: The cross section of the steel tube concrete column (6) is square, circular or elliptical, the reinforcement ring (8) is square or circular, and the upper and lower prefabricated cylinder segments (2) are fixed with high-strength bolts when assembled.

7. The assembled suspension bridge tower according to claim 1, characterized in that: The area of ​​the foundation steel plate (4) is larger than the cross-sectional area of ​​the steel tube concrete column (6), and connection holes corresponding to the bottom anchor bolts (5) are provided on the foundation steel plate (4) outside the main projection area of ​​the steel tube concrete column (6).

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