Combined pier column

Abstract

A combined pier column comprises a prefabricated mold column, a reinforcement cage assembly and a concrete inner core, the prefabricated mold column is prefabricated by ultra-high performance concrete and is convenient to carry, the concrete inner core is formed by post-pouring common concrete, a pouring cavity is formed in the prefabricated mold column, and the reinforcement cage assembly is arranged in the pouring cavity. A pouring cavity is formed in the prefabricated mold column, the reinforcement cage assembly is fixed in the prefabricated mold column through pouring of the ultra-high-performance concrete, at least part of the reinforcement cage assembly extends into the pouring cavity, and the concrete inner core is poured in the pouring cavity so that the prefabricated mold column and the concrete inner core can be connected through the reinforcement cage assembly. On one hand, a steel formwork used when the concrete pier column is poured is omitted; and on the other hand, the cross sectional area of the pier column is reduced, so that the use amount of common concrete is reduced, the performance of the pier column is guaranteed, meanwhile, transportation and assembly of the prefabricated pier column are more convenient, and the prefabricated assembly cost of the pier column is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge piers, and in particular relates to a combined pier. Background Art

[0002] With the rapid development of my country's economy, bridge construction has developed rapidly. The number of bridges in my country has exceeded one million, and bridge construction is also increasingly developing in many aspects such as lightweight, large span, heavy load, and durability. After the traditional cast-in-place bridge is cast, it is necessary to wait for the cement concrete to solidify and harden. The construction period is long and it requires a certain amount of construction site and labor costs. Prefabricating bridges in factories can reduce the time of operation and site occupation, shorten the construction period, and save construction and management costs. Therefore, vigorously promoting prefabrication and assembly technology is the development direction.

[0003] In urban viaducts, the prefabrication and assembly technology of the superstructure has become mature. However, due to the defects of ordinary concrete such as heavy weight, low strength and high brittleness, in order to ensure the strength of the piers, the diameter of the piers is relatively large when ordinary concrete is used for casting. As a result, the deadweight of the piers of urban bridges can reach 200 to 400 tons. The excessive deadweight makes transportation inconvenient and installation difficult, so the assembly problem of the piers has not been well solved. Summary of the invention

[0004] In view of the above shortcomings, the technical problem to be solved by the utility model is to provide a combined pier column, the outer layer of the pier column adopts an ultra-high performance concrete prefabricated structure, thereby facilitating the transportation of the pier column and reducing the overall size of the pier column.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A composite pier column comprises a prefabricated formwork column, a steel cage assembly and a concrete core. A casting cavity is provided in the prefabricated formwork column. The steel cage assembly is fixed in the prefabricated formwork column by casting ultra-high performance concrete and at least partially extends into the casting cavity. The concrete core is cast in the casting cavity so that the prefabricated formwork column and the concrete core are connected through the steel cage assembly.

[0007] As a preferred solution of the present invention, the prefabricated mold column includes a plurality of unit mold columns assembled together.

[0008] As a preferred solution of the utility model, one end surface of the unit mold column is provided with a plug-in structure, and the other end surface is provided with a slot structure, and adjacent unit mold columns are spliced ​​by the plug-in structure and the slot structure.

[0009] As a preferred solution of the utility model, the plug-in structure is a plug-in ring, and the slot structure is an annular groove adapted to the plug-in ring.

[0010] As a preferred solution of the utility model, epoxy resin is filled between the unit mold columns.

[0011] As a preferred solution of the utility model, the steel cage assembly includes connecting steel bars, and the connecting steel bars are arranged along the radial direction of the prefabricated mold column.

[0012] As a preferred solution of the utility model, the steel cage assembly includes longitudinal steel bars arranged along the axial direction of the prefabricated mold column, and the connecting steel bars are evenly arranged on the longitudinal steel bars.

[0013] As a preferred solution of the utility model, the steel cage assembly further includes stirrups, which are sleeved on the outside of the longitudinal steel bars.

[0014] As a preferred solution of the present utility model, the thickness of the prefabricated mold column is 10-15 cm.

[0015] The beneficial effect of the utility model is that, by pouring the concrete core in the prefabricated ultra-high performance concrete formwork, on the one hand, the steel formwork used in pouring the concrete pier column is omitted; on the other hand, the cross-sectional area of ​​the pier column is reduced, thereby reducing the amount of ordinary concrete used. While ensuring the performance of the pier column, the transportation and assembly of the prefabricated pier column are made more convenient, thereby reducing the prefabrication and assembly cost of the pier column. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of this combined pier.

[0017] Figure 2 This is a cross-sectional view of the combined pier.

[0018] Figure 3 It is a schematic diagram of the joint of the unit mold column.

[0019] Figure numerals: prefabricated formwork column 1, unit formwork column 1-1, plug-in ring 1-2, annular groove 1-3, steel cage assembly 2, connecting steel bars 2-1, longitudinal steel bars 2-2, stirrups 2-3, grouting sleeve 2-4, concrete core 3, epoxy resin 4. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] A composite pier column comprises a prefabricated formwork column 1, a steel cage assembly 2 and a concrete core 3, wherein the prefabricated formwork column 1 has a thickness of 10 to 15 cm and is prefabricated with ultra-high performance concrete, the concrete core 3 is post-casted with ordinary concrete, a casting cavity is provided in the prefabricated formwork column 1, the steel cage assembly 2 is fixed in the prefabricated formwork column 1 by casting ultra-high performance concrete and at least partially extends into the casting cavity, the concrete core 3 is cast in the casting cavity, and the prefabricated formwork column 1 and the concrete core 3 are connected through the steel cage assembly 2. By using the prefabricated formwork column 1 prefabricated with ultra-high performance concrete, the overall cross-sectional size of the pier column is reduced while maintaining the same stress performance of the pier column, thereby saving the amount of ordinary concrete; at the same time, the prefabricated formwork column 1 is a hollow structure with a light weight, which is convenient for transporting to the site for splicing and then casting the interior.

[0022] The steel cage assembly 2 is fixed in the prefabricated mold column 1 by pouring ultra-high performance concrete, and it is ensured that part of the steel cage assembly 2 extends into the pouring cavity. By setting the part of the steel cage assembly 2 extending into the pouring cavity, the steel cage assembly 2 is connected to the concrete core 3, thereby increasing the strength and integrity of the composite pier column.

[0023] The prefabricated mold column 1 includes a plurality of unit mold columns 1-1 assembled with each other. The prefabricated mold column 1 is formed by assembling a plurality of unit mold columns 1-1, so that the height of the prefabricated mold column 1 can be adjusted according to the demand, so that the height of the formed combined pier column meets the construction demand.

[0024] One side end face of the unit mold column 1-1 is provided with a plug-in structure, which is a plug-in ring 1-2, and the other side end face is provided with a slot structure, which is an annular groove 1-3 adapted to the plug-in ring 1-2. The plug-in ring 1-2 and the annular groove 1-3 are coaxially arranged with the unit mold column 1-1, and adjacent unit mold columns 1-1 are spliced ​​by the plug-in structure and the slot structure. That is, during the assembly process of adjacent unit mold columns 1-1, the plug-in ring 1-2 on the unit mold column 1-1 is plugged into the annular groove 1-3 of the adjacent unit mold column 1-1, thereby improving the assembly convenience of the unit mold column 1-1.

[0025] Epoxy resin 4 is filled between the unit mold columns 1-1, that is, epoxy resin 4 is coated on the joints of the plug-in ring 1-2 and the annular groove 1-3, and the unit mold columns 1-1 are connected by epoxy resin 4, so as to facilitate the subsequent pouring of the concrete core 3 in the prefabricated mold column 1.

[0026] As a preferred embodiment, after the unit mold columns 1 - 1 are assembled, the outer side of the prefabricated mold column 1 may be entirely coated with paint or other coatings for protecting the prefabricated mold column 1 .

[0027] The steel cage assembly 2 includes connecting steel bars 2-1, longitudinal steel bars 2-2 and stirrups 2-3. The longitudinal steel bars 2-2 are arranged axially along the prefabricated formwork column 1. The connecting steel bars 2-1 are evenly arranged on the longitudinal steel bars 2-2, and the connecting steel bars 2-1 are arranged radially along the prefabricated formwork column 1, so that the two ends of the connecting steel bars 2-1 are respectively connected to the prefabricated formwork column 1 and the concrete core 3. The stirrups 2-3 are sleeved on the outside of the longitudinal steel bars 2-2 for connecting multiple longitudinal steel bars 2-2.

[0028] One end of the longitudinal steel bar 2-2 is extended out of the unit mold column 1-1, and the other end is located in the unit mold column 1-1. A grouting sleeve 2-4 is provided on the end of the longitudinal steel bar 2-2 located in the unit mold column 1-1. When adjacent unit mold columns 1-1 are assembled, the longitudinal steel bars 2-2 on the unit mold column 1-1 are inserted into the grouting sleeve 2-4 on the adjacent unit mold column 1-1, and the adjacent longitudinal steel bars 2-2 are connected through the grouting sleeve 2-4, thereby increasing the connection strength between the longitudinal steel bars 2-2 and transmitting their longitudinal force, so as to ensure that the prefabricated mold column 1 has good mechanical properties after assembly.

[0029] As a preferred embodiment, a certain gap is provided between the side wall of the plug-in ring 1-2 and the side wall of the annular groove 1-3, and the end of the longitudinal steel bar 2-2 extending out of the unit mold column 1-1 is located in the gap. After the unit mold columns 1-1 are assembled with each other, the epoxy resin 4 is filled in the gap between the side wall of the plug-in ring 1-2 and the annular groove 1-3, thereby playing an anti-corrosion role for the longitudinal steel bar 2-2.

[0030] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0031] Although this article uses more terms corresponding to the figure marks in the figures, it does not exclude the possibility of using other terms; these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A composite pier, characterized in that: The prefabricated mold column (1) comprises a steel cage assembly (2), a concrete inner core (3), and a prefabricated mold column (1) cast with ultra-high performance concrete, wherein a casting cavity is provided in the prefabricated mold column (1), the steel cage assembly (2) is fixed in the prefabricated mold column (1) and at least partially extends into the casting cavity, and the concrete inner core (3) is cast in the casting cavity, so that the prefabricated mold column (1) and the concrete inner core (3) are connected via the steel cage assembly (2).

2. A composite pier according to claim 1, characterized in that: The prefabricated mould column (1) comprises a plurality of unit mould columns (1-1) which are assembled together.

3. A composite pier according to claim 2, characterized in that: One end surface of the unit mold column (1-1) is provided with a plug-in structure, and the other end surface is provided with a slot structure, and adjacent unit mold columns (1-1) are spliced ​​together through the plug-in structure and the slot structure.

4. A composite pier according to claim 3, characterized in that: The plug-in structure is a plug-in ring (1-2), and the slot structure is an annular groove (1-3) adapted to the plug-in ring (1-2).

5. A composite pier according to claim 2, characterized in that: Epoxy resin (4) is filled between the unit mold columns (1-1).

6. A composite pier according to claim 1, characterized in that: The steel cage assembly (2) comprises connecting steel bars (2-1), wherein the connecting steel bars (2-1) are arranged along the radial direction of the prefabricated formwork column (1).

7. A composite pier according to claim 6, characterized in that: The steel cage assembly (2) comprises longitudinal steel bars (2-2) arranged axially along the prefabricated formwork column (1), and the connecting steel bars (2-1) are evenly arranged on the longitudinal steel bars (2-2).

8. A composite pier according to claim 7, characterized in that: The steel cage assembly (2) further comprises stirrups (2-3), wherein the stirrups (2-3) are sleeved on the outside of the longitudinal steel bars (2-2).

9. The composite pier according to claim 1, characterized in that: The thickness of the prefabricated mold column (1) is 10-15 cm.

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