A new type of assembled combined bridge pier

Abstract

This utility model provides a novel prefabricated composite bridge pier, comprising an upper supporting component, a lower supporting component, a joint reinforcement component, and a cap beam, a pier column structure, and a foundation arranged sequentially from top to bottom. The pier column structure includes a steel pipe column, a UHPC concrete column, and reinforcing connectors. The steel pipe column is pre-embedded in the UHPC concrete column. Joint reinforcement components are pre-embedded in the joint sections near the bottom of the cap beam and near the top of the foundation on the inner side of the steel pipe column. The reinforcing connectors are connected to the side walls of the steel pipe column. This combination of steel pipe, UHPC concrete, and reinforcing connectors allows for prefabrication in a factory according to the specific pier height, significantly improving construction efficiency. Furthermore, this structure is lighter and easier to transport. The combination of the supporting component and the joint reinforcement component greatly enhances the connection strength with the cap beam and foundation. All components can be pre-embedded, improving construction convenience. Thus, while ensuring lightweight construction, structural strength is also considered.

Description

Technical Field

[0001] This utility model relates to the field of bridge technology, and in particular to a novel prefabricated composite bridge pier. Background Technology

[0002] Traditional cast-in-place concrete bridge pier construction has a long construction period, a large amount of on-site work, high labor intensity, and is greatly affected by natural conditions such as weather. With the increasing awareness of environmental protection, the environmental impact of traditional construction methods has gradually attracted attention.

[0003] Prefabricated bridge piers are manufactured in factories and assembled on-site, enabling modular design and streamlined operations, which greatly shortens the construction period and improves construction quality. Due to the limitations of urban construction and transportation conditions, it is an extremely important issue to address how to achieve both lightweight bridge piers and structural strength.

[0004] Therefore, it is necessary to propose a new type of prefabricated composite bridge pier to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a new type of prefabricated composite bridge pier to solve the problem that prefabricated bridge piers in the prior art cannot simultaneously achieve both lightweight and structural strength.

[0006] To achieve the above objectives, this utility model provides a novel prefabricated composite bridge pier, comprising an upper supporting component, a lower supporting component, a joint reinforcing component, and a cap beam, a pier column structure, and a pier cap arranged sequentially from top to bottom; wherein,

[0007] The pier structure includes a steel pipe column, a UHPC concrete column, and reinforcing connectors. The UHPC concrete column is connected between the cap beam and the pier cap. The steel pipe column is embedded in the UHPC concrete column, and the bottom end of the steel pipe column extends into the pier cap. The joint reinforcement component is embedded in the joint section near the bottom of the cap beam and the joint section near the top of the pier cap on the inner side of the steel pipe column. The reinforcing connectors are connected to the side wall of the steel pipe column.

[0008] The upper support assembly is embedded in the cap beam, and the top end of the steel pipe column is connected to the upper support assembly; the lower support assembly is embedded in the foundation, and the bottom end of the steel pipe column is connected to the lower support assembly.

[0009] Preferably, the upper support assembly includes an upper support steel plate and anchoring steel bars. The upper support steel plate is embedded in the bottom of the cap beam. The top of the steel pipe column is connected to the upper support steel plate. The first end of the anchoring steel bar is connected to the upper support steel plate, and the second end of the anchoring steel bar extends into the cap beam.

[0010] Preferably, the lower support assembly includes a lower end support steel plate and a plurality of anchor steel plates. The lower end support steel plate is pre-embedded in the inner top of the foundation. The plurality of anchor steel plates are arranged at intervals along the circumference of the steel pipe column and connected to the outer side of the steel pipe column located in the foundation section. The top of the anchor steel plate is connected to the lower end support steel plate.

[0011] Preferably, the lower support assembly further includes multiple annular reinforcing bars, and each anchoring steel plate has multiple through holes arranged vertically at intervals. The multiple through holes arranged around the circumference of the steel pipe column form a layer of through holes, and each layer of through holes is connected to one annular reinforcing bar.

[0012] Preferably, the reinforcing connector includes multiple layers of stud units arranged vertically at intervals, each layer of stud unit including multiple studs arranged circumferentially at intervals along the steel pipe column, the studs being connected to the outside of the steel pipe column.

[0013] Preferably, the joint reinforcement assembly includes a plug steel plate, a concrete solid section, and a stiffening steel plate. A plug steel plate is spaced apart on the joint section near the bottom of the cap beam and the joint section near the top of the pier cap on the inner side of the steel pipe column. A concrete solid section fills the space between the upper plug steel plate and the inner wall of the steel pipe column and the upper end bearing steel plate. A concrete solid section also fills the space between the lower plug steel plate and the inner wall of the steel pipe column and the lower end bearing steel plate. The stiffening steel plate connects the side of the plug steel plate away from the concrete solid section to the inner wall of the steel pipe column.

[0014] Preferably, the inner wall of the steel pipe column is connected to multiple layers of the stud units in the concrete solid section.

[0015] Preferably, the spacing between each two adjacent layers of stud units is 400mm to 420mm.

[0016] Preferably, the second end of the anchoring steel bar is inclined outward from the first end.

[0017] Preferably, the number of anchoring steel plates is sixteen, and the sixteen anchoring steel plates are arranged at intervals along the circumference of the steel pipe column.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model provides a novel prefabricated composite bridge pier, comprising an upper support component, a lower support component, a joint reinforcement component, and a cap beam, a pier column structure, and a foundation arranged sequentially from top to bottom. The pier column structure includes a steel pipe column, a UHPC concrete column, and reinforcing connectors. The UHPC concrete column is connected between the cap beam and the foundation. The steel pipe column is embedded in the UHPC concrete column, and the bottom end of the steel pipe column extends into the foundation. Joint reinforcement components are embedded in the joint section near the bottom of the cap beam and the joint section near the top of the foundation on the inner side of the steel pipe column. The reinforcing connectors are connected to the side wall of the steel pipe column. The upper support component is embedded in the cap beam, and the top end of the steel pipe column is connected to the upper support component. The lower support component is embedded in the foundation, and the bottom end of the steel pipe column is connected to the lower support component. This combination of steel pipes, UHPC concrete, and reinforcing connectors allows for prefabrication in a factory according to specific pier height dimensions, significantly improving construction efficiency. Furthermore, this structure is lighter, facilitating transportation and lifting. The integration of supporting components and joint reinforcement significantly enhances the connection strength with the cap beam and pier cap, all of which can be pre-embedded, improving construction convenience. Thus, while ensuring lightweight construction, structural strength is also considered, resulting in a simple and durable structure. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic elevation view of the overall structure in one embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional schematic diagram of the pier body in one embodiment of the present invention;

[0023] Figure 3 This is a cross-sectional schematic diagram of the bottom of the pier in one embodiment of the present invention.

[0024] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0025] Explanation of icon numbers:

[0026] 10. Cap beam; 110. Upper support assembly; 111. Upper support steel plate; 112. Anchor reinforcement; 20. Pier column structure; 210. Steel pipe column; 220. UHPC concrete column; 230. Stud; 240. Joint reinforcement assembly; 241. End plate; 242. Concrete solid section; 243. Stiffening steel plate; 30. Pier cap; 310. Lower support assembly; 311. Lower end support steel plate; 312. Anchor plate; 313. Ring reinforcement. Detailed Implementation

[0027] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] Please see the appendix Figure 1-3This utility model provides a novel prefabricated composite bridge pier in one embodiment, comprising an upper supporting component 110, a lower supporting component 310, a joint reinforcing component 240, and a cap beam 10, a pier column structure 20, and a pier cap 30 arranged sequentially from top to bottom. First, it should be noted that, unlike existing technologies where urban construction and transportation conditions limit the ability to simultaneously achieve lightweight bridge piers and structural strength, this is a crucial issue that needs to be addressed. This application solves the aforementioned deficiencies in existing technologies by providing a novel prefabricated composite bridge pier, as detailed below:

[0032] The pier structure 20 includes a steel pipe column 210, a UHPC concrete column 220, and reinforcing connectors. The UHPC concrete column 220 is connected between the cap beam 10 and the foundation 30. The steel pipe column 210 is embedded in the UHPC concrete column 220, and the bottom end of the steel pipe column 210 extends into the foundation 30. The joint section near the bottom of the cap beam 10 and the joint section near the top of the foundation 30 on the inner side of the steel pipe column 210 are both embedded with the joint reinforcement component 240. The reinforcing connectors are connected to the side wall of the steel pipe column 210. The upper support component 110 is embedded in the cap beam 10, and the top end of the steel pipe column 210 is connected to the upper support component 110. The lower support component 310 is embedded in the foundation 30, and the bottom end of the steel pipe column 210 is connected to the lower support component 310.

[0033] Specifically, the novel prefabricated composite bridge pier in this application includes an upper support component 110, a lower support component 310, a joint reinforcement component 240, a cap beam 10, a pier column structure 20, and a pier cap 30. The cap beam 10, pier column structure 20, and pier cap 30 are arranged sequentially from top to bottom as a conventional bridge pier structure. The pier column structure 20 includes a steel pipe column 210, a UHPC concrete column 220, and reinforcing connectors. It adopts a hybrid structure of steel pipe and UHPC concrete, which makes the structure lightweight, easy to transport and hoist, and can be prefabricated in advance when the pier height is determined, thereby greatly improving construction efficiency. The upper support component 110 and the lower support component 310 are used to strengthen the overall connection with the cap beam 10 and the pier cap 30, respectively, and improve the overall stress. The joint reinforcement component 240 is used to strengthen the structural strength of the steel pipe column 210 at the upper and lower joints.

[0034] The steel pipe column 210 is pre-embedded in the UHPC concrete column 220, while the reinforcing connector is used to strengthen the connection between the steel pipe column 210 and the UHPC concrete column 220 and prevent concrete cracking. During construction, the entire pier structure 20 is prefabricated in the factory, transported to the site for installation, and connected to the cap beam 10 and the foundation 30 through the upper support component 110 and the lower support component 310. The cap beam 10 and the foundation 30 are made of cast-in-place concrete. The upper support component 110 is pre-embedded in the cap beam 10 section and welded to the top of the steel pipe column 210 before the cap beam 10 concrete is poured together. The lower support component 310 is pre-embedded in the foundation 30 section. To facilitate connection, the bottom end of the steel pipe column 210 needs to extend downwards into the foundation 30 section, thus facilitating welding with the lower support component 310 before pouring concrete for the foundation 30 together. Since the steel pipe column 210 has a hollow internal structure, the joint reinforcement component 240 is built into the inside of the steel pipe column 210. It is pre-embedded and processed in the joint section near the bottom of the cap beam 10 and the joint section near the top of the foundation 30 to improve the structural strength at the joint, thereby achieving the effect of overall lightweight while ensuring sufficient structural strength.

[0035] In a preferred embodiment of the present invention, the upper support assembly 110 includes an upper support steel plate and an anchoring steel bar 112. The upper support steel plate is embedded in the bottom of the cap beam 10. The top of the steel pipe column 210 is connected to the upper support steel plate. The first end of the anchoring steel bar 112 is connected to the upper support steel plate, and the second end of the anchoring steel bar 112 extends into the cap beam 10.

[0036] It should be noted that the upper end bearing steel plate can be easily welded to the top of the steel pipe column 210, which is convenient for construction and provides a stable connection, thus serving as a support. Considering that the cap beam 10 is densely packed with steel reinforcement skeletons, in addition to the upper end bearing steel plate, multiple anchoring steel bars 112 are also required to overlap with the steel reinforcement skeleton, thereby significantly improving the overall connection between the pier column structure 20 and the cap beam 10 to cooperate in bearing the load. Preferably, the second end of the anchoring steel bar 112 is inclined outward from the first end, so that multiple anchoring steel bars 112 form a combination similar to an open shape. This inclination can more effectively resist tensile and shear forces. Compared with vertical setting, the inclined setting can better disperse the direction of force, thereby improving the structure's pull-out and shear resistance.

[0037] In a preferred embodiment of the present invention, the lower support assembly 310 includes a lower end support steel plate 311 and a plurality of anchoring steel plates 312. The lower end support steel plate 311 is pre-embedded in the inner top of the support platform 30. The plurality of anchoring steel plates 312 are arranged at intervals along the circumference of the steel pipe column 210 and connected to the outer side of the steel pipe column 210 located in the support platform 30 section. The top of the anchoring steel plate 312 is connected to the lower end support steel plate 311.

[0038] It should be noted that since the bottom end of the steel pipe column 210 extends into the foundation 30 section, the steel pipe column 210 will penetrate the lower end bearing steel plate 311. This facilitates the connection of the anchoring steel plates 312. The anchoring steel plates 312 extend downward to the bottom end of the foundation 30, and multiple anchoring steel plates 312 are arranged at intervals along the circumference of the steel pipe column 210 to evenly cover the foundation 30. This makes the connection between the bottom end of the steel pipe column 210 and the foundation 30 after casting more integral through the lower end bearing steel plate 311 and the anchoring steel plates 312. Thus, the overall structure has better integrity and more balanced stress. Preferably, the number of anchoring steel plates 312 can be set to sixteen, and the sixteen anchoring steel plates 312 are arranged at intervals along the circumference of the steel pipe column 210. The specific number can be set by those skilled in the art in combination with cost considerations.

[0039] In a preferred embodiment of the present invention, the lower support component 310 further includes a plurality of annular reinforcing bars 313, and each anchoring steel plate 312 is provided with a plurality of through holes arranged at intervals along the vertical direction. The plurality of through holes arranged around the circumference of the steel pipe column 210 constitute a layer of through holes, and each layer of the through holes is connected to a ring reinforcing bar 313.

[0040] It is worth noting that, considering that the multiple anchoring steel plates 312 are arranged at intervals, the annular steel bar 313 is used to strengthen the overall connection between the multiple anchoring steel plates 312 to further improve the overall connection. This is achieved by opening multiple through holes arranged at intervals along the vertical direction in each anchoring steel plate 312. In this way, each layer of anchoring steel plates 312 around the whole circle forms a group of through holes, and an annular steel bar 313 passes through the through holes in one group of through holes in turn to complete the connection.

[0041] In a preferred embodiment of the present invention, the reinforcing connector includes multiple layers of stud units arranged vertically at intervals. Each layer of stud unit includes multiple studs 230 arranged circumferentially at intervals along the steel pipe column 210. The studs 230 are connected to the outside of the steel pipe column 210.

[0042] It is worth noting that by arranging multiple layers of studs 230, the steel pipe column 210 and the UHPC concrete column 220 can share the load and coordinate deformation. This connection method can significantly improve the bending bearing capacity and stiffness of the composite structure. At the same time, the studs 230 also play a role in resisting the vertical separation between the steel beam and the UHPC plate, i.e., anti-lifting function, which can prevent interface separation caused by vertical force during the use of the composite beam. The high strength, toughness and compressive strength of UHPC can significantly delay the failure of the studs 230, improve its shear bearing capacity and stiffness, and at the same time improve the crack resistance and durability of the structure.

[0043] The spacing between each pair of adjacent stud units can be set to 400mm to 420mm. Considering the need to ensure strength while saving costs, it is preferably set to 400mm. Those skilled in the art can choose according to actual needs.

[0044] Furthermore, the joint reinforcement assembly 240 includes a plug steel plate 241, a concrete solid section 242, and a stiffening steel plate 243. A plug steel plate 241 is spaced apart on the joint section near the bottom of the cap beam 10 and the joint section near the top of the bearing platform 30 on the inner side of the steel pipe column 210. A concrete solid section 242 is filled between the upper plug steel plate 241 and the inner wall of the steel pipe column 210, and between the upper bearing steel plate and the lower plug steel plate 311. A concrete solid section 242 is also filled between the lower plug steel plate 241 and the inner wall of the steel pipe column 210, and between the lower bearing steel plate 311. The stiffening steel plate 243 connects the side of the plug steel plate 241 away from the concrete solid section 242 to the inner wall of the steel pipe column 210.

[0045] It should be noted that by setting a plug steel plate 241 at intervals near the cap beam 10 and the pier cap 30 inside the steel pipe column 210, a filling space can be formed. Ordinary concrete solid section 242 is poured in this filling space, which can smooth the material change at the joint and avoid large changes in the stress performance at the joint. Therefore, the grade of ordinary concrete in the concrete solid section 242 can be the same as the grade of concrete in the cap beam 10 and the pier cap 30. The stiffening steel plate 243 acts as a stiffening rib, which can improve the shear and bending performance at the joint. It connects the plug steel plate 241 on the side near the center of the pier (the side of the plug steel plate 241 away from the concrete solid section 242) and the inner wall of the steel pipe column 210. It can also be set in multiple forms arranged at intervals along the circumference of the steel pipe column 210.

[0046] Furthermore, considering that the joint reinforcement component 240 has a built-in concrete solid section 242, a multi-layer stud unit can also be set on the inner side of the steel pipe column 210 where the concrete solid section 242 is located, so that the inner side of the steel pipe column 210 and the concrete solid section 242 can share the force and coordinate the deformation.

[0047] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A new type of fabricated composite pier, characterized in that, It includes an upper supporting component, a lower supporting component, a joint reinforcement component, and, from top to bottom, a cap beam, a pier structure, and a foundation; among which, The pier structure includes a steel pipe column, a UHPC concrete column, and reinforcing connectors. The UHPC concrete column is connected between the cap beam and the pier cap. The steel pipe column is embedded in the UHPC concrete column, and the bottom end of the steel pipe column extends into the pier cap. The joint reinforcement component is embedded in the joint section near the bottom of the cap beam and the joint section near the top of the pier cap on the inner side of the steel pipe column. The reinforcing connectors are connected to the side wall of the steel pipe column. The upper support assembly is embedded in the cap beam, and the top end of the steel pipe column is connected to the upper support assembly; the lower support assembly is embedded in the foundation, and the bottom end of the steel pipe column is connected to the lower support assembly.

2. The novel prefabricated composite bridge pier according to claim 1, characterized in that, The upper support assembly includes an upper support steel plate and anchoring steel bars. The upper support steel plate is embedded in the bottom of the cap beam. The top of the steel pipe column is connected to the upper support steel plate. The first end of the anchoring steel bar is connected to the upper support steel plate, and the second end of the anchoring steel bar extends into the cap beam.

3. The new type fabricated composite pier according to claim 2, characterized in that, The lower support assembly includes a lower end support steel plate and multiple anchor steel plates. The lower end support steel plate is embedded in the inner top of the foundation. The multiple anchor steel plates are arranged at intervals along the circumference of the steel pipe column and connected to the outer side of the steel pipe column located in the foundation section. The top of the anchor steel plate is connected to the lower end support steel plate.

4. The new type fabricated composite pier according to claim 3, characterized in that, The lower support assembly also includes multiple ring-shaped reinforcing bars. Each anchoring steel plate has multiple through holes arranged vertically at intervals. The multiple through holes arranged around the circumference of the steel pipe column form a layer of through holes. Each layer of through holes is connected to one of the ring-shaped reinforcing bars.

5. The new type fabricated composite pier according to claim 3, characterized in that, The reinforcing connector includes multiple layers of stud units arranged vertically at intervals. Each layer of stud unit includes multiple studs arranged circumferentially along the steel pipe column, and the studs are connected to the outside of the steel pipe column.

6. The new type fabricated composite pier according to claim 5, characterized in that, The joint reinforcement assembly includes a plug steel plate, a concrete solid section, and a stiffening steel plate. A plug steel plate is spaced apart on the inner side of the steel pipe column near the bottom of the cap beam and on the joint section near the top of the pier cap. A concrete solid section fills the space between the upper plug steel plate and the inner wall of the steel pipe column and the upper end bearing steel plate. A concrete solid section also fills the space between the lower plug steel plate and the inner wall of the steel pipe column and the lower end bearing steel plate. The stiffening steel plate connects the side of the plug steel plate away from the concrete solid section to the inner wall of the steel pipe column.

7. The new type fabricated composite pier according to claim 6, characterized in that, The inner wall of the steel pipe column is connected to multiple layers of the stud units in the concrete solid section.

8. The new type fabricated composite pier according to claim 7, characterized in that, The spacing between each pair of adjacent stud units is 400mm to 420mm.

9. The new type fabricated composite pier according to claim 2, characterized in that, The second end of the anchoring steel bar is inclined outward from the first end.

10. The new type fabricated composite pier according to claim 3, characterized in that, The number of anchoring steel plates is sixteen, and the sixteen anchoring steel plates are arranged at intervals along the circumference of the steel pipe column.

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