A composite bridge tower steel-concrete combined section structure, bridge and construction method

Abstract

The present invention relates to a composite bridge tower steel-concrete combined section structure, bridge and construction method, which includes: a concrete tower column; a steel tower column connected to the concrete tower column through a steel-concrete combined section; a steel-concrete combined section, which includes a steel outer wall plate and a pressure-bearing steel plate arranged on the top of the steel outer wall plate, wherein the steel outer wall plate and the pressure-bearing steel plate enclose a space filled with a concrete structure; the pressure-bearing steel plate protrudes or is recessed in a direction close to the concrete tower column or the steel tower column, or the pressure-bearing steel plate extends obliquely relative to the axis of the concrete tower column. When the concrete structure inside the steel-concrete combined section is poured from bottom to top, as the height of the top of the concrete structure rises, the contact area between the concrete structure and the pressure-bearing steel plate gradually increases, which is more conducive to the concrete structure to discharge the internal air and is easy to ensure the density of the internal concrete structure.

Description

Technical Field

[0001] The present invention relates to the technical field of bridges, and in particular to a composite bridge tower steel-concrete combined section structure, a bridge and a construction method. Background Art

[0002] At present, the steel-concrete structure hybrid bridge tower has a concrete tower column at the bottom and a steel tower column at the top. The concrete tower column and the steel tower column are used in combination, which can make full use of the respective advantages of concrete structure and steel, and meet the project's comprehensive requirements for the mechanical properties of the tower column, engineering quality and engineering cost through different combinations.

[0003] In the related art, a very thick horizontal pressure-bearing steel plate is usually set on the top of the steel-concrete joint section in the steel-concrete hybrid bridge tower to diffuse the high stress of the plate in the steel structure to the concrete structure. Since the pressure-bearing steel plate is a steel plate with a full cross-section, although vertical manholes, casting holes and casting air holes are opened on it, when the concrete structure inside the steel-concrete joint section is cast, since the contact between the concrete structure and the pressure-bearing steel plate is the entire surface contact at the same time, the corners where the pressure-bearing plate is connected to the wall panel and the position between the air holes are prone to accumulate air, resulting in the looseness of the joint section. The pressure-bearing plate is mainly used to transmit pressure, and the looseness of the concrete structure will affect the structural force transmission.

[0004] Therefore, it is necessary to propose a new composite bridge tower steel-concrete combined section structure to solve the above problems. Summary of the invention

[0005] The embodiments of the present invention provide a composite bridge tower steel-concrete joint section structure, a bridge and a construction method to solve the problem in the related art that air is easily accumulated at the corner points where the pressure plate and the wall panel are connected and between the air holes, resulting in a loose concrete structure in the joint section and affecting the force transmission of the structure.

[0006] In a first aspect, a composite bridge tower steel-concrete combined section structure is provided, which includes: a concrete tower column; a steel tower column connected to the concrete tower column via a steel-concrete combined section; the steel-concrete combined section includes a steel outer wall plate and a pressure-bearing steel plate arranged on the top of the steel outer wall plate, the steel outer wall plate and the pressure-bearing steel plate enclosing a space filled with a concrete structure; the pressure-bearing steel plate protrudes or is recessed in a direction close to the concrete tower column or the steel tower column, or the pressure-bearing steel plate extends obliquely relative to the axis of the concrete tower column.

[0007] In some embodiments, the pressure-bearing steel plate protrudes into the interior of the steel tower column.

[0008] In some embodiments, the pressure-bearing steel plate includes a first flat plate and a second flat plate, and the second flat plate is connected around the outer side of the first flat plate, so that the pressure-bearing steel plate forms a prism shape.

[0009] In some embodiments, a channel extending along the axis of the steel tower column is provided inside the steel-concrete combined section, an opening communicating with the channel is provided on the first flat plate, and a plate surface of the first flat plate is perpendicular to the axis of the steel tower column.

[0010] In some embodiments, the axis of the first flat plate coincides with the axis of the steel tower column, and the second flat plate is symmetrically arranged around the axis of the first flat plate.

[0011] In some embodiments, the angle of the second flat plate relative to the horizontal plane is 30° to 60°.

[0012] In some embodiments, the outer side of the pressure-bearing steel plate is fixed to the steel tower column, and the steel outer wall plate extends along the outer wall of the steel tower column toward the concrete tower column.

[0013] In some embodiments, shear nails are provided on the side of the steel outer wall plate and the pressure-bearing steel plate close to the concrete structure, and the shear nails are combined with the concrete structure.

[0014] In a second aspect, a bridge is provided, comprising the composite bridge tower steel-concrete combined section structure described in any one of the above items.

[0015] In a third aspect, a construction method for a composite bridge tower steel-concrete combined section structure as described in any one of the above items is provided.

[0016] The beneficial effects brought about by the technical solution provided by the present invention include:

[0017] The embodiment of the present invention provides a composite bridge tower steel-concrete combined section structure, a bridge and a construction method. Since the pressure-bearing steel plate is convex or concave toward the direction close to the concrete tower column or the steel tower column, or the pressure-bearing steel plate is extended obliquely relative to the axis of the concrete tower column, when the concrete structure inside the steel-concrete combined section is poured from bottom to top, as the height of the top of the concrete structure rises, the contact area between the concrete structure and the pressure-bearing steel plate gradually increases, which is more conducive to the concrete structure to discharge the internal air, and it is easy to ensure the density of the internal concrete structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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 these drawings without creative work.

[0019] Figure 1 A schematic diagram of the overall structure of a steel-concrete combined section structure of a combined bridge tower provided in an embodiment of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the middle BB;

[0021] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of the CC;

[0022] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0023] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure of DD.

[0024] Numbers in the figure:

[0025] 1. Steel tower column; 2. Steel-concrete combined section; 21. Pressure-bearing steel plate; 211. First flat plate; 212. Second flat plate; 213. Opening; 22. Steel outer wall plate; 23. Shear studs; 24. Concrete structure; 25. Passageway; 3. Concrete tower column. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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.

[0027] The embodiments of the present invention provide a combined bridge tower steel-concrete joint section structure, a bridge and a construction method, which can solve the problem in the related art that air is easily accumulated at the corner points where the pressure plate and the wall panel are connected and between the air holes, resulting in a loose concrete structure in the joint section and affecting the force transmission of the structure.

[0028] See also Figure 1 , Figure 4 and Figure 5 As shown, a composite bridge tower steel-concrete combined section structure provided by an embodiment of the present invention may include: a concrete tower column 3; a steel tower column 1, which is connected to the concrete tower column 3 through a steel-concrete combined section 2; the steel-concrete combined section 2 includes a steel outer wall plate 22 and a pressure-bearing steel plate 21 arranged on the top of the steel outer wall plate 22, and the steel outer wall plate 22 and the pressure-bearing steel plate 21 surround a space poured with a concrete structure 24; the pressure-bearing steel plate 21 protrudes or recesses in a direction close to the concrete tower column 3 or the steel tower column 1, or the pressure-bearing steel plate 21 extends obliquely relative to the axis of the concrete tower column 3.

[0029] In this embodiment, a pressure-bearing steel plate 21 is provided on the top of the steel-concrete combined section 2, and steel outer wall plates 22 are provided on the surrounding outer walls. The interior of the pressure-bearing steel plate 21 and the steel outer wall plate 22 is a concrete structure 24, forming a steel-concrete combined section 2 with a concrete structure covered by a steel structure. The top and surrounding steel structures are connected to the upper steel tower column 1, and the internal concrete structure is connected to the lower concrete tower column 3. The steel tower column 1 transmits force to the concrete tower column 3 through the steel-concrete combined section 2. Among them, the pressure-bearing steel plate 21 in this embodiment protrudes or recesses in the direction close to the concrete tower column 3 or the steel tower column 1, or extends obliquely relative to the axis of the concrete tower column 3. When the steel-concrete combined section 2 is poured with the concrete structure 24, the top of the concrete structure 24 first contacts the lowest side of the pressure-bearing steel plate 21, and then as the height of the concrete structure 24 rises, the contact surface between the concrete structure 24 and the pressure-bearing steel plate 21 gradually expands toward the high position of the pressure-bearing steel plate 21. Since the contact area between the concrete structure 24 and the pressure-bearing steel plate 21 gradually increases, compared with the original horizontally arranged pressure-bearing steel plate 21, the top of the concrete structure 24 is in contact with the entire surface of the pressure-bearing steel plate 21, and the air in the concave part of the top of the concrete structure 24 cannot be discharged. The pressure-bearing steel plate 21 in this embodiment allows the concrete structure 24 to gradually discharge the internal air during the process of rising in height, thereby making the concrete structure 24 more compact and ensuring the structural force transmission.

[0030] See also Figure 1 As shown, further, the pressure-bearing steel plate 21 can protrude into the interior of the steel tower column 1. In this embodiment, the pressure-bearing steel plate 21 protrudes into the interior of the steel tower column 1, and the concrete structure 24 on the top of the pressure-bearing steel plate 21 extends into the pressure-bearing steel plate 21. The pressure-bearing steel plate 21 forms a hoop effect on the concrete structure 24, so that the internal concrete is in a three-way compression state, which can improve the compressive strength of the internal concrete and reduce the risk of local crushing of the internal concrete structure. In other embodiments, the pressure-bearing steel plate 21 can also protrude into the interior of the concrete tower column 3, or partially protrude into the steel tower column 1 and partially protrude into the concrete tower column 3.

[0031] See also Figure 1As shown, further, the pressure-bearing steel plate 21 may include a first flat plate 211 and a second flat plate 212, and the second flat plate 212 is connected around the outer side of the first flat plate 211 to form the pressure-bearing steel plate 21 into a prism shape. In this embodiment, the pressure-bearing steel plate 21 is in a prism shape, and the internal concrete structure 24 protrudes into the interior of the steel tower column 1, that is, the steel tower column 1 is wrapped around the outside of the concrete structure 24, and the cross-sectional size of the pressure-bearing steel plate 21 gradually increases from top to bottom, so that the steel structure size of the entire structure of the combined section is gradually reduced, and the size of the concrete structure 24 is gradually increased, which plays a good transition role. Compared with the related art, the horizontal pressure-bearing steel plate divides the structure into two, the upper part is a thin-walled steel structure, and the lower part is a thick-walled concrete structure. The stiffness of the two is quite different, which easily causes the structural deformation at the steel-concrete combined section to be inconsistent. The steel-concrete combined section 2 in this embodiment can achieve a uniform change in structural stiffness.

[0032] In some optional embodiments, the surface of the pressure-bearing steel plate 21 can be a flat plate, an arc, or a wave; the shape of the pressure-bearing steel plate 21 can be a prism, a hemispherical shape, a cone, a square, or other shapes.

[0033] See also Figure 1 and Figure 2 As shown, in some embodiments, the interior of the steel-concrete combination section 2 may be provided with a channel 25 extending along the axis of the steel tower column 1, and the first flat plate 211 is provided with an opening 213 connected to the channel 25, and the surface of the first flat plate 211 may be perpendicular to the axis of the steel tower column 1. In this embodiment, the channel 25 extends along the axis of the steel-concrete combination section 2 and extends into the interior of the concrete tower column 3, which can facilitate maintenance personnel to enter the interior of the concrete structure 24 and the interior of the concrete tower column 3 for maintenance. The surface of the first flat plate 211 is perpendicular to the axis of the steel tower column 1, which can provide a construction platform and also facilitate maintenance personnel to enter the channel 25 through the opening 213. In other embodiments, the surface of the first flat plate 211 may also be inclined in other directions.

[0034] See also Figure 1 As shown, in some embodiments, the axis of the first flat plate 211 can coincide with the axis of the steel tower column 1, and the second flat plate 212 is symmetrically arranged around the axis of the first flat plate 211. In this embodiment, there are 4 second flat plates 212, which are symmetrically distributed around the axis of the first flat plate 211. When the steel tower column 1 transfers the pressure to the internal concrete structure 24 through the pressure-bearing steel plate 21, the symmetrical structure makes the pressure of the pressure-bearing steel plate 21 on the internal concrete structure 24 in all directions more uniform, further improving the compressive strength of the concrete structure 24 and reducing the risk of local crushing of the internal concrete. In other embodiments, the axis of the pressure-bearing steel plate 21 can also deviate from the axis of the steel tower column 1.

[0035] See also Figure 1 As shown, preferably, the angle of the second flat plate 212 relative to the horizontal plane can be 30° to 60°. In this embodiment, the setting of the angle of the second flat plate 212 can better achieve uniform changes in the structural stiffness of the steel-concrete combination section 2, meet the force transmission requirements, facilitate construction, better ensure the compressive strength of the internal concrete structure 24, and be more conducive to the discharge of more air inside the concrete. In other embodiments, the angle of the second flat plate 212 can also be less than 30° or greater than 60°.

[0036] See also Figure 1 As shown, in some embodiments, the outer side of the pressure-bearing steel plate 21 can be fixed to the steel tower column 1, and the steel outer wall plate 22 can extend along the outer wall of the steel tower column 1 toward the direction close to the concrete tower column 3. In this embodiment, the pressure-bearing steel plate 21 and the steel outer wall plate 22 are connected to the upper steel tower column 1, the pressure-bearing steel plate 21 and the steel outer wall plate 22 form a space for pouring concrete, the concrete structure 24 is connected to the concrete tower column 3, and the steel outer wall plate 22 extends to the outside of the concrete structure 24, which is beneficial to the stability of the structure.

[0037] See also Figure 1 and Figure 3 As shown, in some embodiments, the steel outer wall panel 22 and the pressure-bearing steel plate 21 may be provided with shear nails 23 on one side close to the concrete structure 24, and the shear nails 23 are combined with the concrete structure 24. In this embodiment, the force applied to the pressure-bearing steel plate 21 by the steel tower column 1 can be evenly dispersed to the concrete structure 24 through the shear nails 23, and the concrete structure 24 is also more tightly connected to the surrounding steel structures, thereby ensuring the stability of the steel-concrete combined section 2 and further improving the strength of the steel-concrete combined section 2.

[0038] See also Figure 1 As shown, a bridge includes any one of the above-mentioned combined bridge tower steel-concrete combined section structures, which can not only meet the force transmission requirements and make the structural stiffness transition smooth, but also facilitate construction and make the steel-concrete combined section 2 more compact. The bridge can also realize any one of the embodiments of the combined bridge tower steel-concrete combined section structure.

[0039] See also Figure 1 As shown, a construction method for a steel-concrete combined section structure of a combined bridge tower as described in any of the above items, the construction method can also implement any embodiment of the steel-concrete combined section structure of the combined bridge tower.

[0040] The principles of a combined bridge tower steel-concrete combined section structure, bridge and construction method provided by an embodiment of the present invention are as follows:

[0041] The pressure-bearing steel plate 21 of the steel-concrete combined section 2 is an inclined structure on all sides, which can achieve the compactness of the internal concrete structure 24; the concrete inside the pressure-bearing steel plate 21 is a convex structure, and the sizes of the steel structure and the concrete structure gradually change, which can achieve a uniform change in the structural stiffness of the steel-concrete combined section 2; the concrete structure 24 at the top extends into the pressure-bearing steel plate 21, and the pressure-bearing steel plate 21 forms a hoop effect on the concrete structure 24, so that the internal concrete is in a three-way compression state, which can improve the compressive strength of the internal concrete and reduce the risk of local crushing of the internal concrete.

[0042] In the description of the present invention, it should be noted that the terms "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] It should be noted that, in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0044] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A composite bridge tower steel-concrete combined section structure, characterized in that: It includes: Concrete tower column (3); A steel tower column (1) connected to the concrete tower column (3) via a steel-concrete joint section (2); The steel-concrete combined section (2) comprises a steel outer wall plate (22) and a pressure-bearing steel plate (21) arranged on the top of the steel outer wall plate (22), wherein the steel outer wall plate (22) and the pressure-bearing steel plate (21) enclose a space filled with a concrete structure (24); the pressure-bearing steel plate (21) protrudes or is recessed in a direction approaching the concrete tower column (3) or the steel tower column (1), or the pressure-bearing steel plate (21) extends obliquely relative to the axis of the concrete tower column (3).

2. The steel-concrete combined section structure of the combined bridge tower according to claim 1, characterized in that: The pressure-bearing steel plate (21) protrudes into the interior of the steel tower column (1).

3. The steel-concrete combined section structure of the combined bridge tower according to claim 1, characterized in that: The pressure-bearing steel plate (21) comprises a first flat plate (211) and a second flat plate (212), wherein the second flat plate (212) is connected around the outer side of the first flat plate (211), so that the pressure-bearing steel plate (21) forms a prism shape.

4. The steel-concrete combined section structure of the combined bridge tower according to claim 3, characterized in that: The steel-concrete combined section (2) is provided with a channel (25) extending along the axis of the steel tower column (1) inside, the first flat plate (211) is provided with an opening (213) communicating with the channel (25), and the plate surface of the first flat plate (211) is perpendicular to the axis of the steel tower column (1).

5. The steel-concrete combined section structure of the combined bridge tower according to claim 3, characterized in that: The axis of the first flat plate (211) coincides with the axis of the steel tower column (1), and the second flat plate (212) is symmetrically arranged around the axis of the first flat plate (211).

6. The steel-concrete combined section structure of the combined bridge tower according to claim 3, characterized in that: The angle of the second flat plate (212) relative to the horizontal plane is 30° to 60°.

7. The steel-concrete combined section structure of the combined bridge tower according to claim 1, characterized in that: The outer side of the pressure-bearing steel plate (21) is fixed to the steel tower column (1), and the steel outer wall plate (22) extends along the outer wall of the steel tower column (1) in a direction approaching the concrete tower column (3).

8. The steel-concrete combined section structure of the combined bridge tower according to claim 1, characterized in that: The steel outer wall plate (22) and the pressure-bearing steel plate (21) are provided with shear nails (23) on one side close to the concrete structure (24), and the shear nails (23) are combined with the concrete structure (24).

9. A bridge, characterized in that: It includes the composite bridge tower steel-concrete combined section structure as described in any one of claims 1-8.

Images