Connecting structure of steel cover beam and concrete pier column

Abstract

The utility model discloses a steel cover beam and concrete pier column connecting structure which comprises a concrete pier column, concrete is poured in the middle of the top of the concrete pier column to form a pier top, anchoring steel bars are anchored on the periphery of the top of the concrete pier column except the pier top, and one ends of the anchoring steel bars are anchored into the concrete pier column. The steel cover beam is arranged above the concrete pier column, the steel cover beam is of a hollow structure, and grouting holes are reserved in the top and the bottom of the steel cover beam; the fixed end plate is horizontally fixed in the steel cover beam, the fixed end plate is vertically and downwards connected with one ends of a plurality of connecting steel bars, and the other ends of the connecting steel bars are in lap joint with the anchoring steel bars. According to the utility model, the problem of high construction difficulty caused by high matching precision requirement of a reserved hole in a steel cover beam bottom plate and an anchoring steel bar at the top of a concrete pier column can be avoided, and meanwhile, the problem of insufficient connection strength of a steel bar lap joint part is solved by utilizing the characteristic that the bonding performance of UHPC and the steel bar is better; therefore, the construction and installation efficiency and the structural stress performance of the steel cover beam are improved.

Description

Technical Field

[0001] The utility model relates to the field of connection structures of steel cap beams and concrete piers, and more specifically, to a connection structure of steel cap beams and concrete piers based on UHPC-steel lap joints. Background Art

[0002] In bridge engineering, concrete cap beams are widely used due to economic reasons. If cast-in-place construction is adopted, large temporary supports need to be erected, and the construction period is long, the safety hazards are great, and the impact on the surrounding road traffic is great. If prefabrication is adopted, the concrete cap beam has a large self-weight and is difficult to hoist. For some economically developed central and eastern regions, transportation construction and development urgently need to be rebuilt and expanded. The span of the cap beam is usually large. If traditional concrete cap beams are used, the construction difficulty will be greatly increased. At the same time, it will have a great impact on the existing road traffic, increasing the construction risk and cost. At this time, the use of steel cap beams has great advantages. Its structure has a small self-weight, large span capacity, high bearing capacity, and prefabrication and installation have little impact on the existing road traffic. When the steel cap beam is connected to the concrete pier, holes need to be reserved on the bottom plate of the steel cap beam connection part to allow the steel bars on the top of the concrete pier to penetrate during installation, and then the concrete in the inner cavity of the steel cap beam is poured to form a whole. This connection method needs to ensure that the steel bars extending from the top of the concrete pier can be inserted one by one into the reserved holes at the bottom of the steel cap beam. It requires high matching accuracy. In addition, the steel cap beam is large in size during on-site installation, and the positioning accuracy is difficult to control, resulting in great difficulty in the overall construction. Utility Model Content

[0003] In order to achieve these purposes and other advantages according to the utility model, a preferred embodiment of the utility model provides a connection structure of a steel cap beam and a concrete pier column, comprising:

[0004] A concrete pier column, wherein concrete is poured in the middle of the top to form a pier top, and an anchoring steel bar is anchored around the top of the concrete pier column except for the pier top, wherein one end of the anchoring steel bar is anchored in the concrete pier column and the other end extends out of the surface of the concrete pier column;

[0005] A steel cap beam is arranged above the concrete pier, and the steel cap beam is a hollow structure, and grouting holes are reserved at the top and bottom of the steel cap beam;

[0006] A fixed end plate is horizontally fixed in the steel cap beam, and the fixed end plate is vertically downwardly connected to one end of a plurality of connecting steel bars, and the other end of the connecting steel bars is overlapped with the anchoring steel bars.

[0007] Preferably, a pre-buried steel shell is attached to the side of the concrete pier.

[0008] Preferably, the number of the connecting steel bars and the anchoring steel bars is the same and they correspond one to one.

[0009] Preferably, the steel cap beam includes a top plate, a bottom plate, a sub-plate and a cross-partition plate. The top plate and the bottom plate are arranged parallel to each other and spaced apart from each other. Two sub-plates and two cross-partition plates are vertically arranged between the top plate and the bottom plate to form a square columnar structure.

[0010] Preferably, a circle of connecting steel shell is arranged around the outer side surface of the concrete pier column at the position of the pier top, and the bottom end of the connecting steel shell is welded to the top end of the embedded steel shell.

[0011] Preferably, the space between the connecting steel shell and the pier top is filled with UHPC.

[0012] The utility model at least includes the following beneficial effects: in the utility model, the steel cap beam and the concrete pier column are connected by overlapping the connecting steel bars and the anchoring steel bars and then pouring UHPC, the connecting steel bars are fixed in the steel cap beam, and the overlapping section between the connecting steel bars and the anchoring steel bars on the pier top is filled with UHPC, this connection structure can avoid the problem of great construction difficulty caused by the high matching accuracy requirements between the reserved holes in the bottom plate of the steel cap beam and the anchoring steel bars on the top of the concrete pier column, and at the same time, the good bonding performance of UHPC and steel bars is used to solve the problem of insufficient connection strength at the overlapping parts of the steel bars, thereby improving the construction and installation efficiency of the steel cap beam and the structural stress performance.

[0013] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the connection structure between the steel cap beam and the concrete pier column in the utility model.

[0015] Figure 2 It is a plan view of the connection structure between the steel cap beam and the concrete pier column in the utility model.

[0016] Figure 3 It is a structural schematic diagram of the concrete pier column in the utility model.

[0017] Figure 4 It is a plan view of the concrete pier column in the utility model.

[0018] Figure 5 It is a connection plan view of the fixed end plate and the connecting steel bars in the utility model.

[0019] Figure 6 It is a plan view of the fixed end plate and the connecting steel bars in the utility model.

[0020] Figure 7 It is a schematic diagram of the structure of the bottom plate in the steel cap beam of the utility model. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] The following description is used to disclose the utility model so that those skilled in the art can implement the utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the utility model defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the utility model.

[0023] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0024] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0025] like Figure 1-7 As shown, a preferred embodiment of the utility model provides a connection structure between a steel cap beam and a concrete pier column, comprising:

[0026] A concrete pier column 1, wherein concrete is poured in the middle of the top to form a pier top 2, and an anchoring steel bar 3 is anchored around the top of the concrete pier column 1 except for the pier top 2, wherein one end of the anchoring steel bar 3 is anchored in the concrete pier column 1, and the other end extends out of the surface of the concrete pier column 1;

[0027] A steel cap beam, which is arranged above the concrete pier 1, and the steel cap beam is a hollow structure, and grouting holes 10 are reserved at the top and bottom of the steel cap beam;

[0028] The fixed end plate 5 is horizontally fixed in the steel cap beam, and the fixed end plate 5 is vertically downwardly connected to one end of a plurality of connecting steel bars 9, and the other end of the connecting steel bars 9 is overlapped with the anchoring steel bars 3.

[0029] In the above technical solution, when the steel cap beam is constructed, the anchor steel bars 3 embedded in the concrete pier 1 do not need to penetrate into the steel cap beam. The connecting steel bars can penetrate into the concrete pier 1 from the inner cavity of the steel cap beam and the holes reserved at the bottom, and be overlapped and connected with the anchor steel bars 3. This can avoid the problem of difficulty in punching the anchor steel bars at the top of the concrete pier when installing the steel cap beam, thereby reducing the construction difficulty and improving the construction efficiency.

[0030] In another technical solution, the number of the connecting steel bars and the anchoring steel bars 3 is the same and they correspond one to one.

[0031] In another technical solution, the steel cap beam includes a top plate 4-1, a bottom plate 4-2, a web plate 4-3 and a cross partition 4-4. The top plate 4-1 and the bottom plate 4-2 are arranged parallel to each other and spaced apart from each other. Two web plates 4-3 and two cross partitions 4-4 are vertically arranged between the top plate 4-1 and the bottom plate 4-2 to form a square columnar structure.

[0032] In another technical solution, a pre-embedded steel shell 6 is attached to the side of the concrete pier 1. A connecting steel shell 7 is arranged around the outer side of the concrete pier 1 at the position of the pier top 2, and the bottom end of the connecting steel shell 7 is welded to the top end of the pre-embedded steel shell 6.

[0033] In the above technical solution, the connecting steel shell is welded to the bottom plate of the steel cap beam and the embedded steel shell, and its ribs are embedded in the post-cast UHPC on the pier top, which can improve the integrity of the steel cap beam and the concrete pier column. At the same time, it can serve as a template for pouring the UHPC on the pier top during construction, thereby improving construction efficiency.

[0034] In another technical solution, the space between the connecting steel shell 7 and the pier top 2 is filled with UHPC 8 .

[0035] In the above technical solution, concrete is poured into the space between the connecting steel shell 7 and the pier top 2 through the grouting holes for secondary concrete pouring. The concrete cannot be effectively vibrated, while UHPC does not contain coarse aggregate and has good density and fluidity, which can significantly improve the construction quality.

[0036] The space between the connecting steel shell 7 and the pier top 2 is filled with UHPC 8 instead of ordinary concrete, because the overlap of steel bars in ordinary concrete usually has quality defects, resulting in low connection strength. UHPC does not contain coarse aggregate, has better bonding performance with steel bars, and has better mechanical properties in all aspects, which can effectively improve the stress performance of the connection part, thereby improving the overall performance of the structure.

[0037] There will be a large bending moment at the top of the concrete pier at the rigid node. At the same time, under the action of the steel cap beam, main beam, second phase cross and live load, a large local compressive stress will appear at the top of the pier. UHPC has high tensile and compressive strength. Using it at the top of the pier instead of ordinary concrete can improve the local stress performance of the structure.

[0038] The following provides the construction and installation method of the connection structure between the steel cap beam and the concrete pier column:

[0039] ① During factory prefabrication, the fixed end plates with connecting steel bars have been welded to the web and diaphragm of the steel cap beam. When the steel cap beam is installed on site, it is first hoisted to the designed position, and the bottom plate of the steel cap beam is placed on the concrete of the pier top;

[0040] ②At this time, the number and position of the connecting steel bars of the steel cap beam and the anchoring steel bars of the concrete pier top are matched, the superimposed sections are tied and overlapped, and then the connecting steel shell is installed, the bottom of the connecting steel shell is welded and fixed to the embedded steel shell on the concrete pier top, and the top of the connecting steel shell is welded and fixed to the bottom plate of the steel cap beam;

[0041] ③ The feed pipe passes through the grouting port reserved on the top and bottom plates of the steel cap beam, and pours UHPC around the pier top and the bottom of the steel cap beam until the UHPC mortar penetrates into the inner cavity of the steel cap beam;

[0042] ④ Pour ordinary concrete into the inner cavity of the steel cap beam through the reserved grouting holes on the top plate of the steel cap beam. After the concrete reaches a certain strength, close the reserved grouting holes on the top plate.

[0043] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A connection structure between a steel cap beam and a concrete pier column, characterized in that: include: A concrete pier column, wherein concrete is poured in the middle of the top to form a pier top, and an anchoring steel bar is anchored around the top of the concrete pier column except for the pier top, wherein one end of the anchoring steel bar is anchored in the concrete pier column and the other end extends out of the surface of the concrete pier column; A steel cap beam is arranged above the concrete pier, and the steel cap beam is a hollow structure, and grouting holes are reserved at the top and bottom of the steel cap beam; A fixed end plate is horizontally fixed in the steel cap beam, and the fixed end plate is vertically downwardly connected to one end of a plurality of connecting steel bars, and the other end of the connecting steel bars is overlapped with the anchoring steel bars.

2. The connection structure between the steel cap beam and the concrete pier column according to claim 1 is characterized in that: A pre-buried steel shell is attached to the side of the concrete pier.

3. The connection structure between the steel cap beam and the concrete pier column according to claim 1 is characterized in that: The number of the connecting steel bars and the anchoring steel bars is consistent and corresponds one to one.

4. The connection structure of the steel cap beam and the concrete pier column according to claim 1 is characterized in that: The steel cap beam includes a top plate, a bottom plate, a sub-plate and a transverse partition. The top plate and the bottom plate are arranged parallel to each other and spaced apart from each other. Two sub-plates and two transverse partitions are vertically arranged between the top plate and the bottom plate to form a square columnar structure.

5. The connection structure between the steel cap beam and the concrete pier column according to claim 2 is characterized in that: A circle of connecting steel shell is arranged around the part of the outer side surface of the concrete pier column located at the pier top, and the bottom end of the connecting steel shell is welded to the top end of the embedded steel shell.

6. The connection structure of the steel cap beam and the concrete pier column according to claim 5 is characterized in that: The space between the connecting steel shell and the pier top is filled with UHPC.

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