Anti-corrosion structure of externally-wrapped UHPC steel pier

Abstract

The utility model relates to an external UHPC steel pier anticorrosion structure, which comprises a steel pier, studs, an UHPC external structure layer and a built-in reinforcing mesh, the studs are welded on the outer surface of the steel pier, the UHPC external structure layer is arranged on the outer side of the steel pier, the reinforcing mesh is arranged in the UHPC external structure layer, and the reinforcing mesh is connected with the steel pier through the studs. The anti-corrosion purpose of the steel pier is achieved by wrapping the UHPC structural layer, the UHPC anti-seepage performance and durability are outstanding, the influence of corrosive substances on the steel pier can be well resisted, meanwhile, the structure construction is convenient and fast, the appearance quality is good, the anti-corrosion performance is outstanding, and meanwhile the site construction time is effectively shortened.

Description

Technical Field

[0001] This utility model relates to the field of bridges, and more specifically, to an anti-corrosion structure for UHPC steel bridge piers. Background Technology

[0002] Steel bridge piers possess excellent strength and seismic performance, and can be custom-made according to the actual geological environment of the bridge, ensuring quality and timely completion. They also exhibit good wind resistance and are lightweight, making transportation and construction more convenient and efficient. However, steel bridge piers are prone to corrosion during use, requiring pre-treatment with anti-corrosion measures and regular inspection and maintenance. Ultra-high performance concrete (UHPC), as a new type of concrete material, possesses excellent mechanical and material properties. Its internal steel fiber incorporation results in outstanding density, high impermeability, and good durability. Conventional anti-corrosion measures for steel bridge piers require frequent and costly maintenance, and are inconvenient for underwater bridge piers. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an external UHPC steel bridge pier anti-corrosion structure, which can eliminate the risk of steel bridge pier corrosion and eliminate the need for subsequent maintenance costs.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to construct an anti-corrosion structure for UHPC steel bridge piers, including steel bridge piers, studs, UHPC outer structural layer and built-in steel mesh. The studs are welded to the outer surface of the steel bridge piers, the UHPC outer structural layer is set on the outside of the steel bridge piers, the steel mesh is placed in the UHPC outer structural layer, and the steel mesh is connected to the steel bridge piers by studs.

[0005] In the above scheme, the height range of the UHPC outer structure layer is from the foot of the steel bridge pier to the top of the pier.

[0006] In the above scheme, stiffening ribs are provided on the inner side of the steel pier and the outer side of the pier foot.

[0007] In the above scheme, the steel piers and abutments are connected by a steel base plate, anchor bolts, and a layer of ordinary concrete.

[0008] In the above scheme, the inner side of the steel bridge pier is filled with shrinkage-compensating self-compacting concrete.

[0009] The external UHPC steel bridge pier anti-corrosion structure of this utility model has the following beneficial effects:

[0010] 1. Ultra-high performance concrete (UHPC) has excellent mechanical and material properties, with outstanding impermeability and durability. It can effectively resist the impact of corrosive substances on steel bridge piers and eliminate the risk of corrosion of steel bridge piers.

[0011] 2. The UHPC steel pier anti-corrosion structure of this utility model is easy to construct, has good appearance quality, and does not affect the overall project schedule while providing outstanding anti-corrosion performance, eliminating the need for later maintenance and saving overall costs. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0013] Figure 1 This is a schematic diagram of the elevation of the UHPC steel bridge pier anti-corrosion structure of this utility model;

[0014] Figure 2 for Figure 1 Schematic diagram of the AA section of the UHPC steel bridge pier anti-corrosion structure;

[0015] Figure 3 for Figure 2 Schematic diagram of the BB section of the UHPC steel bridge pier anti-corrosion structure;

[0016] Figure 4 for Figure 1 Schematic diagram of the CC section of the UHPC steel pier anti-corrosion structure;

[0017] Attached drawings: 1-Steel pier; 2-Stiffening rib; 3-Stokes; 4-Reinforcing mesh; 5-UHPC outer structural layer; 6-Ordinary concrete layer; 7-Anchor bolt; 8-Pile cap; 9-Steel base plate; 10-Shrinkage self-compacting concrete. Detailed Implementation

[0018] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0019] like Figure 1-4 As shown, the present invention relates to an anti-corrosion structure for UHPC steel bridge piers, comprising a steel bridge pier 1, studs 3, a UHPC outer structural layer 5, and an internal steel mesh 4. Studs 3 are welded to the outer surface of the steel bridge pier 1, the UHPC outer structural layer 5 is disposed on the outside of the steel bridge pier 1, and the steel mesh 4 is placed in the UHPC outer structural layer 5. The steel mesh 4 is connected to the steel bridge pier 1 by studs 3.

[0020] The height range of the UHPC outer structural layer 5 is from the foot of the steel pier 1 to the top of the pier, with a reserved construction height at the top of the pier.

[0021] Stiffening ribs 2 are pre-installed on the inner side and outer side of the pier foot of steel pier 1. Studs 3 are pre-installed at the position of the UHPC outer structural layer 5 of steel pier 1. Studs 3 and stiffening ribs 2 are pre-welded in the factory.

[0022] After the steel pier 1 is transported to the bridge site, the steel pier 1 and the abutment 8 are connected by a steel base plate 9, anchor bolts 7 and ordinary concrete layer 6.

[0023] The inner side of steel pier 1 is filled with shrinkage-compensating self-compacting concrete 10.

[0024] The UHPC outer structural layer 5 was cast in place on-site at the bridge site after the steel pier 1 was constructed, and then naturally cured after casting.

[0025] The thickness and height of the UHPC outer structural layer 5 can be controlled according to the bridge design and construction requirements.

[0026] This invention employs an external UHPC (Ultra-High-Pressure Polymer) coating method for corrosion protection of steel bridge piers, eliminating the risk of corrosion and reducing subsequent maintenance costs. Furthermore, the UHPC construction process is simple, has a short curing time, and does not affect the overall project schedule.

[0027] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A corrosion-resistant structure for UHPC-encased steel bridge piers, characterized in that, The structure includes steel piers, studs, a UHPC (Ultra-High-Pressure Polymer) outer structural layer, and an internal reinforcing mesh. Studs are welded to the outer surface of the steel piers. The UHPC outer structural layer is located on the outside of the steel piers, and the reinforcing mesh is placed inside the UHPC outer structural layer. The reinforcing mesh is connected to the steel piers by studs. Stiffening ribs are provided on the inner side of the steel piers and the outer side of the pier feet. The steel piers and the abutment are connected by a steel base plate, anchor bolts, and a layer of ordinary concrete. The inner side of the steel piers is filled with shrinkage-compensating self-compacting concrete.

2. The anti-corrosion structure for externally packaged UHPC steel bridge piers according to claim 1, characterized in that, The height range of the UHPC outer cladding structure layer is from the foot of the steel bridge pier to the top of the pier.

Images