A steel-concrete connecting device for a fabricated bridge pier column and bent cap

Abstract

The utility model relates to a kind of steel-mix connection device of fabricated bridge pier column and bent cap, including a steel sleeve, the section size of steel sleeve is consistent with the section size of pier column, the top of steel sleeve is welded with an upper locating plate, bottom is welded with a lower locating plate, the side of upper and lower locating plate is flush with the outside wall surface of steel sleeve, and the main reinforcement through-hole consistent with the main reinforcement layout of pier column is respectively equipped on upper and lower locating plate, and the concrete pouring hole is respectively equipped in the middle of upper and lower locating plate;The outer wall of steel sleeve is evenly welded with multiple stiffeners along the axial direction of steel sleeve, and the top edge and bottom edge of each stiffener are flush with the top surface of upper locating plate and the bottom surface of lower locating plate respectively.The utility model prefabricated concrete pier column section top and with pier column concrete pouring are integrated, steel structure bent cap can be directly supported in pier column top when installing, and welding is carried out with bent cap through stiffener, and bent cap installation speed is fast, cost is low, and safety is good.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology and relates to a steel-concrete connection device for prefabricated bridge piers and cap beams, which is used for efficient connection of precast concrete piers and precast steel structure cap beams of bridges. Background Technology

[0002] Prefabricated bridge piers are constructed by assembling multiple precast concrete pier segments, while the cap beams are assembled from multiple steel structure cap beam segments. To achieve an effective connection between the concrete piers and the steel cap beams, it is typically necessary to install embedded steel sections at the top of the uppermost pier segment. When installing the steel cap beam at the top of the pier, temporary supports need to be erected below the cap beam to create a space between the cap beam and the top of the pier. After welding the embedded steel sections at the top of the pier to the bottom of the cap beam, formwork is installed around the gap at the bottom of the pier and cap beam, and concrete is poured. This process not only consumes a large amount of auxiliary materials (such as temporary supports and mortar), but also involves numerous system changes, a long construction period, and poor safety and economic efficiency. Summary of the Invention

[0003] The purpose of this utility model is to address the above-mentioned problems by providing a steel-concrete connection device for prefabricated bridge piers and cap beams, thereby achieving low-cost and efficient connection between prefabricated steel structure cap beams and prefabricated concrete piers.

[0004] The technical solution of this utility model is as follows:

[0005] A prefabricated steel-concrete connection device for bridge piers and cap beams, characterized in that: it includes a steel sleeve, the cross-sectional dimensions of which are consistent with the cross-sectional dimensions of the pier; an upper positioning plate is welded to the top of the steel sleeve, and a lower positioning plate is welded to the bottom; the sides of the upper and lower positioning plates are flush with the outer wall of the steel sleeve; the upper and lower positioning plates are respectively provided with main reinforcement through holes consistent with the main reinforcement layout of the pier; and concrete pouring holes are respectively provided in the middle of the upper and lower positioning plates; multiple stiffening plates are uniformly welded along the axial direction of the steel sleeve on the outer wall of the steel sleeve, and the top and bottom edges of each stiffening plate are flush with the top surface of the upper positioning plate and the bottom surface of the lower positioning plate, respectively.

[0006] When in use, this utility model is installed on the top of the uppermost precast concrete pier segment and is cast as a whole with the pier concrete. During the later installation of the precast steel structure cap beam, the cap beam can be directly supported on the top of the pier and welded to the cap beam through stiffening plates. There is no need to erect temporary supports or involve the conversion of the force system. It can quickly complete the effective connection between the precast steel structure cap beam and the precast concrete pier, and has low construction cost and good safety. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0008] Figure 2 This is a three-dimensional structural diagram of the steel sleeve of this utility model;

[0009] Figure 3 This is a side view of the utility model in use;

[0010] Figure 4 This is a plan view of the utility model in use. Detailed Implementation

[0011] like Figure 1 , Figure 2 As shown, this utility model includes a steel sleeve 1, the cross-sectional dimensions of which are consistent with the cross-sectional dimensions of the pier column. An upper positioning plate 2 is welded to the top of the steel sleeve 1, and a lower positioning plate 3 is welded to the bottom. The sides of the upper and lower positioning plates are flush with the outer wall of the steel sleeve. The upper positioning plate 2 and the lower positioning plate 3 are respectively provided with main reinforcement through holes 4 that are consistent with the layout of the main reinforcement of the pier column. Concrete pouring holes 5 are respectively provided in the middle of the upper positioning plate 2 and the lower positioning plate 3. Multiple stiffening plates 6 are uniformly welded along the axial direction of the steel sleeve 1 on the outer wall of the steel sleeve. The top and bottom edges of each stiffening plate 6 are flush with the top surface of the upper positioning plate and the bottom surface of the lower positioning plate, respectively.

[0012] The method of using this utility model is as follows:

[0013] When pouring the top segment of the pier column, after the main reinforcement of the pier column is installed, the steel sleeve is placed around the main reinforcement of the pier column, and the main reinforcement of the pier column is passed through the main reinforcement through holes on the lower positioning plate and the upper positioning plate in sequence. The upper end of the main reinforcement is adjusted to be flush with the top surface of the upper positioning plate, and the upper and lower positioning plates are welded and fixed to the main reinforcement. In order not to affect the installation of the pier column formwork, the stiffening plate on the outer wall of the steel sleeve is not welded first. After the formwork is installed, the pier column concrete is poured through the concrete pouring through hole at the top of the upper positioning plate until it is flush with the top surface of the upper positioning plate. The steel sleeve and the pier column are then cast as one piece, and the prefabrication of the pier column segment is completed.

[0014] like Figure 3 , Figure 4 As shown, during bridge construction, after the installation of the upper segment 7 of the pier column is completed, the cap beam 8 is installed. The cap beam is lifted using lifting equipment, and both ends of the cap beam 8 are directly supported on the top of the two pier columns 7. After precise measurement and adjustment, stiffening plates 6 are welded between the side wall of the steel sleeve 1 and the bottom of the cap beam 8, thus completing the steel-concrete connection between the steel structure cap beam and the concrete pier column.

Claims

1. A prefabricated steel-concrete connection device for bridge piers and cap beams, characterized in that: The system includes a steel sleeve with cross-sectional dimensions matching those of the pier column. An upper positioning plate is welded to the top of the steel sleeve, and a lower positioning plate is welded to the bottom. The sides of the upper and lower positioning plates are flush with the outer wall of the steel sleeve. The upper and lower positioning plates are respectively provided with through holes for main reinforcement bars, which are consistent with the layout of the main reinforcement bars of the pier column. Concrete pouring holes are respectively provided in the middle of the upper and lower positioning plates. Multiple stiffening plates are uniformly welded along the axial direction of the steel sleeve on its outer wall. The top and bottom edges of each stiffening plate are flush with the top surface of the upper positioning plate and the bottom surface of the lower positioning plate, respectively.

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