Lightweight fabricated pier structure

Abstract

The invention provides a light-weight assembly type pier structure, and relates to the technical field of prefabricated assembly type piers, the light-weight assembly type pier structure comprises a prefabricated cover beam, at least two prefabricated pier bodies and a prefabricated bearing platform, and the prefabricated cover beam, the at least two prefabricated pier bodies and the prefabricated bearing platform are sequentially stacked from top to bottom and are fixedly connected; the prefabricated pier body comprises a first connecting assembly, a composite pier column and a second connecting assembly, one end of the first connecting assembly and one end of the second connecting assembly are inserted into the two ends of the composite pier column correspondingly and fixedly connected with the two ends of the composite pier column, and the first connecting assembly and the second connecting assembly are symmetrically arranged. The first connecting assembly located below the prefabricated cover beam is fixedly connected with the prefabricated cover beam, the second connecting assembly is fixedly connected with the first connecting assembly of the next prefabricated pier body, and the second connecting assembly located above the prefabricated bearing platform is fixedly connected with the prefabricated bearing platform. The overall weight of the bridge pier can be effectively reduced, and meanwhile the strength and the assembly stability degree of the bridge pier can be improved.

Description

Technical Field

[0001] This invention relates to the field of prefabricated bridge pier technology, and in particular to a lightweight prefabricated bridge pier structure. Background Technology

[0002] With social progress and increased public awareness of environmental protection, the construction environment of bridges is receiving increasing attention, especially for core urban bridges. Construction period, noise pollution, and traffic congestion are becoming primary considerations in bridge design. Precast assembly technology offers advantages such as standardized component production, rapid and convenient on-site installation, and energy-saving and environmentally friendly construction. It reduces impact on the atmospheric environment and traffic, improves quality and safety, and promotes civilized construction, making it a development trend in my country's bridge industry. Precast piers involve prefabricating pier components in segments and then assembling them into a unified structure. The design can be mainly divided into several aspects: standardization of pier segments, standardization of segment connections, standardization of pier-to-abutment connections, and full utilization of current BIM information management technology to accelerate construction efficiency while facilitating life-cycle management. Among these, standardization of segment connections, standardization of pier-to-abutment connections, and seismic design in high-seismic-intensity areas are of paramount importance.

[0003] Currently, most precast bridge piers are made by solid casting using molds. When used to support small bridges or large equipment, these solid precast bridge piers consume a lot of concrete. Moreover, their large size results in a large weight, which in turn makes transportation inconvenient. Furthermore, while solid bridge piers use a lot of concrete, the support strength has not been significantly improved.

[0004] Composite tube, steel, and concrete structures demonstrate significant technical advantages in bridge pier applications, achieving synergistic effects through complementary material properties: the composite tube, with its high specific strength, corrosion resistance, and lightweight characteristics, serves as an external protective layer, effectively isolating environmental erosion and bearing tensile strength; the internal steel, utilizing its high ductility, enhances seismic resistance; and concrete, as the core compressive material, provides stable support. The three elements combine to form a multi-layered load-bearing system. This structure combines lightweight design with high seismic performance. The lightweight nature of the composite tube reduces the pier's self-weight and foundation load, while the ductile-elastic combination of steel and composite tube efficiently dissipates seismic energy and inhibits crack propagation. Simultaneously, the composite tube's encapsulation of concrete and steel significantly improves durability, reducing maintenance requirements in corrosive environments. Combined with modular prefabrication and on-site assembly processes, it significantly improves construction efficiency and adapts to complex geometric designs. Furthermore, by reducing concrete usage and introducing recyclable steel and composite materials, the composite structure lowers life-cycle costs and carbon emissions. Lightweight composite structures made of composite pipes, steel and concrete have broad application prospects in bridge piers, especially in extreme conditions such as marine environments, high-intensity earthquake zones and areas surrounding chemical plants.

[0005] Therefore, it is necessary to propose a lightweight prefabricated bridge pier structure to reduce the weight of the bridge pier while also improving its strength and assembly stability. Summary of the Invention

[0006] To address the aforementioned issues, this invention proposes a lightweight prefabricated bridge pier structure that reduces the weight of the bridge pier while simultaneously improving its strength and assembly stability.

[0007] This invention is achieved through the following technical solution: This invention proposes a lightweight prefabricated bridge pier structure, including a precast cap beam, at least two precast bridge piers, and a precast abutment. The precast cap beam, the at least two precast bridge piers, and the precast abutment are stacked and fixedly connected sequentially from top to bottom. Each precast bridge pier includes a first connecting component, a composite pier column, and a second connecting component. One end of the first connecting component and one end of the second connecting component are respectively inserted into both ends of the composite pier column and fixedly connected to both ends of the composite pier column. The first connecting component and the second connecting component are symmetrically arranged. The first connecting component located below the precast cap beam is fixedly connected to the precast cap beam. The second connecting component is fixedly connected to the first connecting component of the next precast bridge pier. The second connecting component located above the precast abutment is fixedly connected to the precast abutment.

[0008] Furthermore, the composite pier includes a composite material pipe, a first concrete, a steel pipe fitting, and a second concrete. The second concrete is cylindrical and fills the inside of the steel pipe fitting. The first concrete fills the space between the steel pipe fitting and the composite material pipe. The composite material pipe is the outermost layer. One end of the first connecting component and one end of the second connecting component are respectively inserted into the two ends of the steel pipe fitting and fixedly connected to the two ends of the steel pipe fitting.

[0009] Furthermore, both ends of the steel pipe fitting are provided with mounting parts, which are recessed. The second concrete is filled between the two mounting parts. One end of the first connecting component and one end of the second connecting component are respectively inserted into the mounting parts and fixedly connected to the mounting parts.

[0010] Furthermore, the mounting part includes a sinking trough and a mounting plate. The mounting plate is fixedly connected to the bottom wall of the sinking trough, and one end of the first connecting component or one end of the second connecting component is inserted into the sinking trough and fixedly connected to the mounting plate.

[0011] Furthermore, a first filling cavity is provided between the two mounting parts. The mounting part also includes a plurality of reinforcing ribs. The plurality of reinforcing ribs are evenly distributed around the inner wall of the first filling cavity. One end of the plurality of reinforcing ribs is fixedly connected to the bottom surface of the mounting plate, and one side of the plurality of reinforcing ribs is fixedly connected to the inner wall of the first filling cavity. The second concrete fills the first filling cavity, and the other side of the plurality of reinforcing ribs extends into the second concrete.

[0012] Furthermore, the outer periphery of the steel pipe fitting is provided with a plurality of first reinforcing plates, which are evenly distributed circumferentially and extend into the first concrete.

[0013] Furthermore, the first connecting assembly includes a flange, a third concrete, and a reinforcing steel ring. The reinforcing steel ring is welded to the outer periphery of one end of the flange, so that the flange forms a second filling cavity. The third concrete fills the second filling cavity. The other end of the flange is inserted into one end of the steel pipe and fixedly connected to one end of the steel pipe. The first connecting assembly has the same structure as the second connecting component.

[0014] Furthermore, one end of the flange component is provided with an insertion connection end, which extends outward and is higher than the third concrete. The insertion connection end is inserted into one end of the steel pipe component and is fixedly connected to one end of the steel pipe component.

[0015] Furthermore, the flange component is provided with multiple mounting holes, which are evenly distributed circumferentially. The reinforcing steel ring is provided with the same number of clearance grooves as the mounting holes, which are evenly distributed circumferentially and aligned with the mounting holes.

[0016] Furthermore, the flange component is provided with a plurality of second reinforcing plates, which are evenly distributed around the outer wall of the insertion connection end, and are all housed in the second filling cavity and extend into the third concrete.

[0017] The beneficial effects of this invention are: This invention uses at least two precast bridge piers to connect the precast cap beam and the precast abutment. During transportation, the precast bridge piers can be transported separately. Each precast bridge pier is formed by fixing a first connecting component and a second connecting component to both ends of a composite pier column. When assembling multiple precast bridge piers, the second connecting component of the previous precast bridge pier is fixedly connected to the first connecting component of the next precast bridge pier, and so on, successfully assembling multiple precast bridge piers and improving the stability of the connection. The precast bridge pier formed by combining the composite pier column with the first and second connecting components is lightweight, high-strength, and easy to transport. In summary, this lightweight precast bridge pier structure effectively reduces the overall weight of the bridge pier while also improving its strength and assembly stability. Attached Figure Description

[0018] Figure 1 This is an exploded view of the lightweight prefabricated bridge pier structure of the present invention; Figure 2 This is an overall schematic diagram of the lightweight prefabricated bridge pier structure of the present invention; Figure 3 This is a cross-sectional view of the composite pier column of the lightweight prefabricated bridge pier structure of the present invention; Figure 4 This is a schematic diagram of the steel pipe components of the lightweight prefabricated bridge pier structure of the present invention; Figure 5 This is a cross-sectional view of the first connecting component of the lightweight prefabricated bridge pier structure of the present invention. Figure 6 This is a schematic diagram of the first connecting component of the lightweight prefabricated bridge pier structure of the present invention; Figure 7 This is a schematic diagram of the flange component and reinforcing steel ring of the lightweight prefabricated bridge pier structure of the present invention.

[0019] The attached figures are labeled as follows: Precast cap beam 1; Precast bridge pier 2, first connecting assembly 21, flange 211, second filling cavity 2111, insertion connecting end 2112, annular connecting plate 21121, mounting hole 2113, second reinforcing plate 2114, third concrete 212, reinforcing steel ring 213, clearance groove 2131, composite pier column 22, composite material pipe 221, first concrete 222, steel pipe fitting 223, installation part 2231, sinking groove 22311, installation plate 22312, reinforcing rib 22313, first filling cavity 2232, first reinforcing plate 2233, second concrete 224, second connecting assembly 23; Precast foundation 3. Detailed Implementation

[0020] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0021] Please refer to Figures 1-7 This invention proposes a lightweight prefabricated bridge pier structure, including a precast cap beam 1, at least two precast bridge piers 2, and a precast abutment 3. The precast cap beam 1, at least two precast bridge piers 2, and precast abutment 3 are stacked sequentially from top to bottom and fixedly connected by bolts. The precast bridge pier 2 includes a first connecting component 21, a composite pier column 22, and a second connecting component 23. One end of the first connecting component 21 and one end of the second connecting component 23 are respectively inserted into the two ends of the composite pier column 22 and fixedly connected to the two ends of the composite pier column 22. The first connecting component 21 and the second connecting component 23 are symmetrically arranged. The first connecting component 21 located below the precast cap beam 1 is fixedly connected to the precast cap beam 1. The second connecting component 23 is fixedly connected to the first connecting component 21 of the next precast bridge pier 2. The second connecting component 23 located above the precast abutment 3 is fixedly connected to the precast abutment 3.

[0022] In this embodiment, at least two precast bridge piers 2 are used to connect the precast cap beam 1 and the precast abutment 3. During transportation, the precast cap beam 1, precast bridge piers 2, and precast abutment 3 can be transported separately. The precast bridge piers 2 are formed by fixing the first connecting component 21 and the second connecting component 23 to both ends of the composite pier column 22, so that multiple precast bridge piers 2 can be directly connected and used using the first connecting component 21 or the second connecting component 23. When assembling multiple precast bridge piers 2, the second connecting component 23 of the previous precast bridge pier 2 is fixedly connected to the first connecting component 21 of the next precast bridge pier 2, and so on, so as to successfully assemble multiple precast bridge piers 2. The mutual fixed connection of the first connecting component 21 and the second connecting component 23 improves the stability of the connection. The precast bridge piers 2 formed by the combination of the composite pier column 22 and the first connecting component 21 and the second connecting component 23 are lightweight, high-strength, and easy to transport. In summary, this lightweight prefabricated bridge pier structure can effectively reduce the overall weight of the bridge pier, while also improving the strength and assembly stability of the bridge pier.

[0023] In this embodiment, the composite pier 22 includes a composite material pipe 221, a first concrete 222, a steel pipe fitting 223, and a second concrete 224. The second concrete 224 is cylindrically filled inside the steel pipe fitting 223. The first concrete 222 is filled between the steel pipe fitting 223 and the composite material pipe 221. The composite material pipe 221 is the outermost layer. One end of the first connecting component 21 and one end of the second connecting component 23 are respectively inserted into the two ends of the steel pipe fitting 223 and fixedly connected to the two ends of the steel pipe fitting 223. The composite material pipe 221 is an FRP pipe, and the first concrete 222 and the second concrete 223 are both ultra-high performance concrete. During fabrication, the steel pipe fitting 223 needs to be placed in the center of the composite pipe 221. Then, a hollow pipe is placed in the center of the steel pipe fitting 223 as a mold. During pouring, concrete fills the space between the composite pipe 221 and the steel pipe fitting 223 to form the first concrete 222. At the same time, concrete is poured into the space between the steel pipe fitting 223 and the hollow pipe, filling the space between the steel pipe fitting 223 and the hollow pipe to form the cylindrical second concrete 224. Since the hollow pipe is used as a mold, after solidification, the hollow pipe can be removed, and the second concrete 224 has a cylindrical hollow structure, which helps to reduce the overall weight of the composite pier column 22.

[0024] In this embodiment, both ends of the steel pipe 223 are provided with mounting portions 2231, which are recessed. The second concrete 224 is filled between the two mounting portions 2231. One end of the first connecting component 21 and one end of the second connecting component 23 are respectively inserted into the mounting portions 2231 and fixedly connected to them. When assembling the first connecting component 21 and the second connecting component 23 at both ends of the composite pier 22, one end of the first connecting component 21 is inserted into one mounting portion 2231 and then locked and fixed with multiple bolts. One end of the second connecting component 23 is inserted into the other mounting portion 2231 and then locked and fixed with multiple bolts. After the first connecting component 21 and the second connecting component 23 are fixed on the two mounting portions 2231 respectively, the assembly of the precast bridge pier 2 is completed.

[0025] In this embodiment, the mounting part 2231 includes a sinkhole 22311 and a mounting plate 22312. The mounting plate 22312 is fixedly connected to the bottom wall of the sinkhole 22311. The mounting plate 22312 is a thick steel plate welded to the inner wall of the steel pipe fitting 223. The mounting plate 22312 has a ring structure, and one of the mounting plates 22312 is provided with a pouring hole. When the second concrete 224 is poured, the concrete can be poured into the interior through the pouring hole. One end of the first connecting assembly 21 or the second connecting assembly... One end of component 23 is inserted into the recessed groove 22311 and fixedly connected to the mounting plate 22312. The recessed groove 22311 provides a recessed space so that one end of the first connecting component 21 or one end of the second connecting component 23 can be pre-installed by insertion and then fixed to the mounting plate 22312 by multiple bolts. The mounting plate 22312 is provided with multiple threaded holes. One end of the first connecting component 21 or one end of the second connecting component 23 is locked in the multiple threaded holes by multiple bolts to achieve a fixed connection.

[0026] In this embodiment, a first filling cavity 2232 is provided between the two mounting portions 2231. Each mounting portion 2231 also includes a plurality of reinforcing ribs 22313. These reinforcing ribs 22313 are evenly distributed circumferentially around the inner wall of the first filling cavity 2232. One end of each reinforcing rib 22313 is fixedly connected to the bottom surface of the mounting plate 22312, and one side of each reinforcing rib 22313 is fixedly connected to the inner wall of the first filling cavity 2232. Second concrete 224 is filled into the first filling cavity 2232. The multiple reinforcing ribs 22313... On the other side, they extend into the second concrete 224. Since the mounting plate 22312 has a ring structure and is welded to the inner wall of the steel pipe 223, there is a space between the mounting plates 22312 at both ends. This space is the first filling cavity 2232. The multiple reinforcing ribs 22313 are used to strengthen the support strength of the mounting plate 22312. Filling the first filling cavity 2232 with the second concrete 224 increases the support strength of the mounting plate 22312, making the support force of the mounting plate 22312 more sufficient.

[0027] In this embodiment, a plurality of first reinforcing plates 2233 are provided on the outer periphery of the steel pipe fitting 223. The plurality of first reinforcing plates 2233 are evenly distributed circumferentially and extend into the first concrete 222. When concrete is poured into the space between the steel pipe fitting 223 and the composite pipe 221, the poured concrete will submerge the plurality of first reinforcing plates 2233. After solidification, the first concrete 222 is formed. Since the plurality of first reinforcing plates 2233 extend into the first concrete 222, the fixing force of the concrete on the steel pipe fitting 223 is improved.

[0028] In this embodiment, the first connecting assembly 21 includes a flange 211, a third concrete 212, and a reinforcing steel ring 213. The reinforcing steel ring 213 is welded to the outer periphery of one end of the flange 211, forming a second filling cavity 2111. The third concrete 212 fills the second filling cavity 2111. The other end of the flange 211 is inserted into one end of the steel pipe 223 and fixedly connected to one end of the steel pipe 223. The first connecting assembly 21 and the second connecting assembly 23 have the same structure. The flange 211 is a steel structure. When the first connecting assembly 21 or the second connecting assembly 23 is connected... During production, the reinforcing steel ring 213 needs to be welded to the outer periphery of one end of the flange 211. The height of the reinforcing steel ring 213 is lower than the maximum height of the flange 211. After welding, a second filling cavity 2111 is formed. The second filling cavity 2111 has a ring structure. After concrete is filled into the second filling cavity 2111 and solidifies, a third concrete 212 is formed. The combination of the third concrete 212 and the reinforcing steel ring 213 strengthens the strength of the flange 211, making the overall structure of the first connecting component 21 or the second connecting component 23 stronger and more stable when connected.

[0029] In this embodiment, one end of the flange component 211 is provided with an insertion connection end 2112, which extends outward and is higher than the third concrete 212. The insertion connection end 2112 is inserted into one end of the steel pipe component 223 and fixedly connected to one end of the steel pipe component 223. The insertion connection end 2112 is provided with an annular connecting plate 21121, and the insertion connection end 2112 has a hollow structure. When the first connecting component 21 or the second connecting component 23 is connected to the composite pier column 22, the insertion connection end 2112 is inserted into one end of the steel pipe component 223, and the annular connecting plate 21121 is inserted into the composite pier column 22. 21 is attached to the mounting plate 22312, and then the annular connecting plate 21121 is locked to the mounting plate 22312 by multiple bolts to form a fixed connection. The hollow structure of the insertion connection end 2112 is to provide a space for workers to enter and tighten the bolts. After the insertion connection end 2112 is locked to the mounting plate 22312, the top of the third concrete 212 will be attached to one end face of the composite pier column 22. When the entire precast pier body 2 is supported, the precast pier body 2 can be supported as a whole structure, which improves the strength of the support.

[0030] In this embodiment, the flange component 211 is provided with multiple mounting holes 2113, which are evenly distributed circumferentially. The reinforcing steel ring 213 is provided with the same number of clearance grooves 2131 as the mounting holes 2113, which are evenly distributed circumferentially and aligned with the mounting holes 2113. In order to enable the first connecting component 21 and the second connecting component 23 to be bolted, the multiple mounting holes 2113 need to be set on the periphery. The clearance grooves 2131 on the reinforcing steel ring 213 make the outer periphery of the reinforcing steel ring 213 present multiple concave structures. The concave structure strengthens the connection strength of the third concrete 212 and also reserves space for the bolts to be tightened in the mounting holes 2113. When the first connecting component 21 and the second connecting component 23 are bolted, the planes of the two flange components 211 are fitted together, and then the mounting holes 2113 of both sides are aligned and fixed by bolts.

[0031] In this embodiment, the flange component 211 is provided with a plurality of second reinforcing plates 2114, which are evenly distributed around the outer wall of the insertion connection end 2112. The plurality of second reinforcing plates 2114 are used to reinforce the insertion connection end 2112, so that the insertion connection end 2112 has a high support strength. The plurality of second reinforcing plates 2114 are all housed in the second filling cavity 2111 and extend into the third concrete 212. When the concrete fills the second filling cavity 2111, the concrete will submerge the plurality of second reinforcing plates 2114. After the concrete solidifies, the plurality of second reinforcing plates 2114 extend into the third concrete 212, which strengthens the connection and fastening of the third concrete 212 to the insertion connection end 2112, and also improves the strength of the insertion connection end 2112.

[0032] Of course, the present invention may have many other embodiments. Based on this embodiment, other embodiments obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention.

Claims

1. A lightweight prefabricated bridge pier structure, characterized in that, The bridge includes a precast cap beam, at least two precast piers, and a precast abutment. The precast cap beam, at least two precast piers, and the precast abutment are stacked and fixedly connected from top to bottom. Each precast pier includes a first connecting component, a composite pier column, and a second connecting component. One end of the first connecting component and one end of the second connecting component are respectively inserted into both ends of the composite pier column and fixedly connected to both ends of the composite pier column. The first connecting component and the second connecting component are symmetrically arranged. The first connecting component located below the precast cap beam is fixedly connected to the precast cap beam. The second connecting component is fixedly connected to the first connecting component of the next precast pier. The second connecting component located above the precast abutment is fixedly connected to the precast abutment.

2. The lightweight prefabricated bridge pier structure according to claim 1, characterized in that, The composite pier includes a composite material pipe, a first concrete, a steel pipe fitting, and a second concrete. The second concrete is cylindrical and filled inside the steel pipe fitting. The first concrete is filled between the steel pipe fitting and the composite material pipe. The composite material pipe is the outermost layer. One end of the first connecting component and one end of the second connecting component are respectively inserted into the two ends of the steel pipe fitting and fixedly connected to the two ends of the steel pipe fitting.

3. The lightweight prefabricated bridge pier structure according to claim 2, characterized in that, Both ends of the steel pipe fitting are provided with mounting parts, which are recessed. The second concrete is filled between the two mounting parts. One end of the first connecting component and one end of the second connecting component are respectively inserted into the mounting parts and fixedly connected to the mounting parts.

4. The lightweight prefabricated bridge pier structure according to claim 3, characterized in that, The mounting part includes a sinking trough and a mounting plate. The mounting plate is fixedly connected to the bottom wall of the sinking trough. One end of the first connecting component or one end of the second connecting component is inserted into the sinking trough and fixedly connected to the mounting plate.

5. The lightweight prefabricated bridge pier structure according to claim 4, characterized in that, A first filling cavity is provided between the two mounting parts. The mounting part also includes a plurality of reinforcing ribs. The plurality of reinforcing ribs are evenly distributed around the inner wall of the first filling cavity. One end of the plurality of reinforcing ribs is fixedly connected to the bottom surface of the mounting plate, and one side of the plurality of reinforcing ribs is fixedly connected to the inner wall of the first filling cavity. The second concrete fills the first filling cavity, and the other side of the plurality of reinforcing ribs extends into the second concrete.

6. The lightweight prefabricated bridge pier structure according to claim 2, characterized in that, The outer periphery of the steel pipe is provided with a plurality of first reinforcing plates, which are evenly distributed circumferentially and extend into the first concrete.

7. The lightweight prefabricated bridge pier structure according to claim 2, characterized in that, The first connecting assembly includes a flange, a third concrete, and a reinforcing steel ring. The reinforcing steel ring is welded to the outer periphery of one end of the flange, so that the flange forms a second filling cavity. The third concrete fills the second filling cavity. The other end of the flange is inserted into one end of the steel pipe and fixedly connected to one end of the steel pipe. The first connecting assembly has the same structure as the second connecting component.

8. The lightweight prefabricated bridge pier structure according to claim 7, characterized in that, One end of the flange is provided with an insertion connection end, which extends outward and is higher than the third concrete. The insertion connection end is inserted into one end of the steel pipe and is fixedly connected to one end of the steel pipe.

9. The lightweight prefabricated bridge pier structure according to claim 7, characterized in that, The flange component is provided with multiple mounting holes, which are evenly distributed circumferentially. The reinforcing steel ring is provided with the same number of clearance grooves as the mounting holes, which are evenly distributed circumferentially and aligned with the mounting holes.

10. The lightweight prefabricated bridge pier structure according to claim 8, characterized in that, The flange component is provided with a plurality of second reinforcing plates, which are evenly distributed around the outer wall of the insertion connection end, and are all housed in the second filling cavity and extend into the third concrete.

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