CN211312176U - Prefabricated UHPC lattice formula bridge pier column structure of assembling - Google Patents
Prefabricated UHPC lattice formula bridge pier column structure of assembling Download PDFInfo
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- CN211312176U CN211312176U CN201921802040.2U CN201921802040U CN211312176U CN 211312176 U CN211312176 U CN 211312176U CN 201921802040 U CN201921802040 U CN 201921802040U CN 211312176 U CN211312176 U CN 211312176U
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Abstract
A prefabricated assembled UHPC lattice type bridge pier column structure comprises a column top structure and a bearing platform, wherein a pier column is formed by assembling and combining a plurality of UHPC columns, the tops of the UHPC columns penetrate into prefabricated holes of the column top structure to be fixed, and the bottoms of the UHPC columns penetrate into prefabricated holes of the bearing platform to be fixed; all UHPC columns are fixedly connected into a whole through prefabricated horizontally arranged column connecting components. The utility model can solve the problems of heavy hoisting weight and difficult construction of the existing precast concrete pier; the construction quality is difficult to control, and the detectability is poor; the shock resistance is not clear; poor durability.
Description
Technical Field
The utility model relates to a bridge engineering field, concretely relates to pier system is assembled in prefabrication, and UHPC lattice formula bridge pier stud structure is assembled in especially prefabrication.
Background
The traditional construction process for cast-in-place of concrete mainly adopted by bridge substructure has long construction period, much labor investment and great influence on current traffic and environment, and in order to alleviate the problems, the technology of prefabricating and assembling the bridge starts to be applied and developed in bridge construction.
At present, the research and application of domestic and overseas prefabricated assembly technologies mainly focus on upper structures, the practical application of lower structure prefabricated assembly technologies is not common, and the mainly adopted structural form is also a reinforced concrete structure and is mostly positioned in non-earthquake-resistant areas or middle-low intensity areas. The main problems of the precast concrete bridge pier are: the hoisting weight is large, and the construction is difficult; the construction quality is difficult to control, and the detectability is poor; the shock resistance is not clear; the durability is poor. This set of problems has limited the wide range of applications for this type of architecture. Therefore, how to provide a prefabricated pier with easy quality guarantee, small hoisting weight and good seismic performance will further expand the application range of the prefabricated assembled pier structure, especially the application in high-intensity areas.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the utility model provides a prefabricated assembled UHPC lattice type bridge pier column structure, which solves the problems of heavy hoisting weight and difficult construction of the existing prefabricated concrete pier; the construction quality is difficult to control, and the detectability is poor; the shock resistance is not clear; poor durability.
The utility model adopts the following technical proposal:
a prefabricated assembled UHPC lattice type bridge pier column structure comprises a column top structure and a bearing platform,
the pier column is formed by splicing and combining a plurality of UHPC (ultra high performance concrete) column bodies, wherein the top of each UHPC column body penetrates into the prefabricated hole of the column top structure for fixation, and the bottom of each UHPC column body penetrates into the prefabricated hole of the bearing platform for fixation; all the UHPC cylinders are fixedly connected into a whole through prefabricated horizontally arranged cylinder connecting components.
The combined pier column comprises four UHPC cylinders symmetrically arranged at four corners of the pier column, and the main bodies are fixedly connected through the connecting members.
The top and the bottom of the UHPC column are respectively provided with a plurality of circles of convex connecting keys at different heights, the top structure and the bearing platform are respectively provided with concave socket grooves corresponding to the positions of the UHPC column, a plurality of circles of first connecting keys are arranged in the bearing grooves corresponding to the first connecting keys, the connecting keys at the top and the bottom of the UHPC column are respectively arranged in a staggered manner with the first connecting keys arranged in the top structure and the bearing platform, and UHPC slurry is poured into the bearing grooves for anchoring and fixing.
Two adjacent UHPC cylinders are connected into a whole through a connecting component between the cylinders; the UHPC column body is a rectangular or circular column.
The connecting component between the columns comprises section steel, vertical connecting flange plates are fixed on the edges of two ends of the section steel in a transverse mode, the section steel is fixed on the UHPC column through the connecting flange plates, and a plurality of radial stiffening ribs are arranged between the connecting flange plates and the section steel for connection.
A split anchor bolt hole is reserved on the UHPC column body, a split anchor bolt penetrates into the anchor bolt hole, and two ends of the split anchor bolt extend out of the split anchor bolt hole; the connecting flange plate is fixed at one end of the split anchor bolt through a nut, and the other end of the connecting flange plate is fixed on the side wall of the UHPC column body through a nut.
And the UHPC cylinder is provided with an embedded anchor bolt, and the connecting plate is fixed at the end of the embedded anchor bolt through a nut.
The pier stud structure is suitable for a middle pier or a public pier of a bridge.
A construction method of a prefabricated assembled UHPC lattice type bridge pier column structure comprises the following steps:
1) prefabricating a UHPC cylinder and connecting keys at the top and the bottom of the UHPC cylinder, and conveying the UHPC cylinder to a construction site;
2) constructing a bearing platform, arranging a preformed hole and a connecting key I, hoisting the UHPC cylinder to a construction position, burying the bottom of the UHPC cylinder into the preformed hole of the bearing platform, and pouring UHPC slurry until the UHPC slurry is condensed;
3) and prefabricating a column top structure, arranging a reserved groove and a connecting key I, hoisting the construction column top structure to a construction position, inserting the top of the UHPC column body into the reserved groove of the column top structure, and pouring UHPC slurry to finish the pier column structure after the UHPC slurry is condensed.
The column top structure is a column top structure or a capping beam.
Among them, Ultra-High Performance Concrete (UHPC) is also called Reactive Powder Concrete (RPC), which is the prior art.
The utility model discloses there is following positive beneficial effect:
the utility model belongs to a light in weight, intensity are high, construction convenient novel assembled bridge pier stud structure. The problems of large hoisting weight, complex connection process and poor structure durability of the conventional concrete prefabricated pier stud are solved.
The prefabricated assembled UHPC lattice pier is formed by assembling a plurality of columns through lattice connecting pieces, and simultaneously, the good material performance of UHPC is fully utilized, so that the size of the prefabricated pier is greatly reduced, the weight of the columns is small, the hoisting weight can be reduced, the construction is convenient and fast, the hoisting weight can be reduced by more than half compared with the conventional concrete prefabricated pier, and the construction difficulty is greatly reduced; the UHPC is utilized to perform perfusion connection on the ultra-strong anchoring connection capability of the connecting piece, the design difficulty is simplified, the construction process is simple, the connection strength between the components is easy to ensure, and the engineering quality controllability is strong; meanwhile, the connecting members among the columns are used as energy consumption members, so that the safety of the columns in the earthquake can be protected, and the columns are easy and convenient to repair after the earthquake and low in cost; the seismic performance of the prefabricated pier is obviously improved; the pier column main body is made of UHPC material and has good durability.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of a column top without a capping beam;
FIG. 3 is a diagrammatic illustration of the connection at location A of FIG. 1 using a split anchor connection;
FIG. 4 is a schematic view of the location A in FIG. 1, which is connected by pre-buried anchors;
fig. 5 is a schematic structural diagram of an embodiment of the present invention;
FIG. 6 is a schematic view showing the distribution of the connection member and UHPC column according to the present invention;
fig. 7 is a schematic structural view of the connecting key position of the present invention.
The reference numbers: 1-UHPC column; 2-connecting members between the columns; 3-a connecting bond; 4-UHPC slurry; 5-a connecting bond one; 6-column top construction; 7-split anchor bolt; 8-anchor plate; 9-embedded anchor bolts; 10-a capping beam; 11-a cushion cap; 12-mounting holes.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
The following examples are given for the purpose of illustrating the present invention in a clear manner and are not intended to limit the scope of the present invention. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art based on the following description, and it is within the spirit of the present invention that such variations and modifications are within the scope of the present invention.
Referring to the attached drawings, the prefabricated assembled UHPC lattice type bridge pier column structure comprises a column top structure and a bearing platform,
the pier column is formed by assembling and combining a plurality of UHPC (ultra high performance concrete) column bodies 1, wherein the top parts of the UHPC column bodies 1 penetrate into the prefabricated holes of the column top structure for fixation, and the bottom parts of the UHPC column bodies 1 penetrate into the prefabricated holes of the bearing platform 11 for fixation; all the UHPC columns 1 are fixedly connected into a whole through prefabricated horizontally arranged column connecting components 2.
The combined pier column comprises four UHPC columns 1 which are symmetrically arranged at four corners of the pier column, and the main bodies are fixedly connected through the connecting members.
The top and the bottom of the UHPC column body 1 are respectively provided with a plurality of circles of convex connecting keys 3 at different heights, the column top structure and the bearing platform 11 are respectively provided with concave bearing slots corresponding to the positions of the UHPC column body 1, a plurality of circles of connecting keys I5 are arranged in the bearing slots corresponding to the connecting keys 3, the connecting keys 3 at the top and the bottom of the UHPC column body 1 are respectively arranged with the connecting keys I5 arranged in the column top structure and the bearing platform 11 in a staggered manner, and UHPC slurry 4 is poured into the bearing slots for anchoring and fixing.
Two adjacent UHPC cylinders 1 are connected into a whole through an inter-cylinder connecting component 2; the UHPC cylinder 1 is a rectangular or circular cylinder.
The connecting component 2 between the columns comprises section steel, vertical connecting flange plates are fixed on the edges of two ends of the section steel in a transverse mode, the section steel is fixed on the UHPC column body 1 through the connecting flange plates, and a plurality of radial stiffening ribs are arranged between the connecting flange plates and the section steel for connection.
A counter-pull anchor bolt hole 12 is reserved on the UHPC column body 1, a counter-pull anchor bolt 7 penetrates into the anchor bolt hole 12, and two ends of the counter-pull anchor bolt 7 extend out of the counter-pull anchor bolt hole 12; the connecting flange plate is fixed at one end of the split anchor bolt 7 by a nut, and the other end of the connecting flange plate is fixed on the side wall of the UHPC column body 1 by a nut.
An embedded anchor bolt 9 is arranged on the UHPC column body 1, and the connecting plate is fixed at the end of the embedded anchor bolt 9 through a nut.
The pier stud structure is suitable for a middle pier or a public pier of a bridge.
A construction method of a prefabricated assembled UHPC lattice type bridge pier column structure comprises the following steps:
1) prefabricating a UHPC cylinder 1 and connecting keys 3 at the top and the bottom of the UHPC cylinder, and conveying the UHPC cylinder to a construction site;
2) constructing a bearing platform 11, arranging a preformed hole and a connecting key I5, hoisting the UHPC cylinder 1 to a construction position, burying the bottom of the UHPC cylinder into the preformed hole of the bearing platform 11, and pouring UHPC slurry 4 for coagulation;
3) prefabricating a column top structure, arranging a reserved groove and a connecting key I5, hoisting the construction column top structure to a construction position, inserting the top of the UHPC column body 1 into the reserved groove of the column top structure, and pouring UHPC slurry 4 until the UHPC slurry is condensed to finish the column top structure.
The column top structure is a column top structure 6, or a cap beam 10.
UHPC refers to ultra high performance concrete.
Referring to fig. 1-4, the prefabricated assembled UHPC lattice bridge pier stud of the present invention includes UHPC column, inter-column connecting member, top structure or capping beam, column and bearing platform connecting structure, column and pier top structure or capping beam connecting structure.
1) The UHPC column body is a main stress component of the pier column, and needs to transmit axial force, shearing force, bending moment and torque generated by an upper structure to a lower foundation. The columns are made of UHPC materials in a factory, and the number of the columns, the material performance requirements and the reinforcing steel bar configuration requirements are determined according to the stress requirements.
2) The connecting components between the columns can ensure the cooperative stress of the columns and ensure the integral stress characteristic of the pier column. Meanwhile, the energy-consuming column can be used as an energy-consuming component according to the requirement of anti-seismic performance, and the safety of the column under the action of an earthquake is ensured. The connecting members between the columns can be connected through mounting holes reserved on the UHPC, so that the construction is convenient and fast, (the connecting port can also be used as a hoisting hole when the columns are hoisted); the installation and the connection can also be carried out by pre-embedding anchor bolts on the column body in advance.
3) The column top structure is used when the coping is not arranged, the top of each column body can be connected into a whole through the structure, the deformation consistency of the column bodies on the top plate is ensured, and meanwhile, the concentrated force transmitted by the upper structure support can be distributed to the column bodies.
4) The connecting structure of the column body and the bearing platform is a key structure for ensuring reliable force transmission between the pier column and the bearing platform, and comprises a connecting key at the bottom of the column body, a reserved groove of the bearing platform, a connecting key and a post-poured UHPC. When the bearing platform is constructed, the notch and the connecting key are arranged according to requirements, the column body and the connecting key are prefabricated in a factory, and after the column body and the connecting key are transported to a site, installed and positioned, UHPC is poured to complete connection. Because the cylinder body is small in size and is poured by UHPC high-strength materials, the plane size and the depth of the notch of the bearing platform can be greatly reduced; meanwhile, due to the ultra-strong anchoring and connecting capacity of the UHPC to the connecting piece, the cylinder connecting piece and the bearing platform connecting piece only need to be anchored with UHPC encapsulating materials respectively.
5) The connection structure of the column body and the bent cap is a key structure for ensuring reliable force transmission between the pier column and the bent cap, and comprises a connection key at the top of the column body, a preformed hole of the bent cap, a connection key and a post-poured UHPC. During the construction of the capping beam, the preformed holes and the connecting keys are arranged according to requirements, the columns and the connecting keys are prefabricated in a factory, and after the columns and the connecting keys are transported to the site, installed and positioned, UHPC is poured to complete the connection. Because the volume of the cylinder body is small and UHPC high-strength material is adopted for pouring, the size and the depth of the hollow opening of the bent cap can be greatly reduced, and the design difficulty of the bent cap is greatly reduced; meanwhile, due to the ultra-strong anchoring and connecting capacity of the UHPC to the connecting piece, the cylinder connecting piece and the bent cap connecting piece only need to be anchored with UHPC encapsulating materials respectively.
Application examples
Referring to fig. 5, a specific structure of the present invention will be further described by taking a certain experimental engineering as an example.
The general engineering profile is as follows: the bridge is designed into a one-connection three-span cast-in-place concrete continuous box girder structure, the total length of the bridge is 90m, the span is arranged to be 3 multiplied by 30m, a middle pier is fixed with a basin-type support for supporting, and a public pier is supported by a double-column capping beam; the transverse full width of the single bridge is 16 m. Pier stud and bent cap all adopt prefabricated component, and the pier stud adopts prefabricated UHPC lattice formula bridge pier stud form of assembling.
The main beam:
the main beam adopts a prestressed concrete cast-in-place continuous box beam, a single box has three chambers, the height of the beam is 1.6m, the top width of the box beam is 16m, the bottom width of the box beam is 12m, the bottom plate of the main beam is horizontal, and the transverse gradient design of the top surface of the roadway plate is the same as that of the bridge deck.
The middle pier is as follows:
the middle pier is supported by double columns in the transverse direction, a single pier column adopts the prefabricated assembled UHPC lattice type bridge pier column form of the utility model, each pier column consists of 4-limb UHPC column bodies 1, the column bodies adopt solid rectangular sections, the section size is 50x50cm, the column height is 7m, the column space is 1.5m, and connecting members 2 between the column bodies, which are made of steel pipes with the length D equal to 30cm, are adopted to connect and assemble; the top of the column body is connected into a whole through a column top structure 6 of a concrete prefabricated component, and the size of the column top structure is 3.0 multiplied by 1.5 m. The fixed basin type support is arranged on the column top structure 6, and a cast-in-place box beam is connected to the support.
The public pier is as follows:
the public pier is supported by a double-column cover beam, and a plate type support is arranged on the cover beam to support the upper structure. The single pier column of the bent cap also adopts the form of the prefabricated assembled UHPC lattice type bridge pier column of the utility model, each pier column consists of 4-limb UHPC column bodies 1, the column bodies adopt solid rectangular sections, the section size is 50 multiplied by 50cm, the transverse distance between the column bodies is 1.5m, and the longitudinal bridge distance is 1.0 m; the columns are connected and spliced by adopting a connecting member 2 between the columns, which is made of a steel pipe with the length D equal to 35 cm. The column body is connected with a precast concrete capping beam, the height of the capping beam is 1.6m, a reserved groove is arranged at the beam bottom corresponding to the position of the UHPC column body, and a connecting key groove is arranged in the reserved groove.
The utility model discloses in the middle pier the capital structure is capital structure 6, public mound the capital structure is bent cap 10.
The basis is as follows:
the UHPC lattice type bridge pier column foundation adopts a pile-connected bearing platform form, the size of the bearing platform is 6.5 multiplied by 2.15m, and 4 cast-in-situ bored piles with the diameter of 1.5m are connected below the bearing platform. A preformed groove is arranged on the bearing platform corresponding to the position of the UHPC column body, and a connecting key groove is arranged in the preformed groove and used for installing the UHPC column body.
The examples demonstrate that: if the traditional prefabricated reinforced concrete pier stud (D is 1.5m, H is 7.0m), the hoisting weight of each pier stud needs at least 31 tons, and the hoisting weight of a single column (with the section of 50x50cm, H is 7.0m) is less than 5.0 tons by adopting the UHPC lattice pier stud, so that the hoisting difficulty in site construction is greatly reduced. The utility model discloses a prefabricated UHPC lattice type bridge pier stud form of assembling has reduced the component size, has simplified the design degree of difficulty and construction process, and the connection between the component is simple and convenient, and engineering quality controllability is strong, has solved the prefabricated pier stud of conventional concrete hoist and mount heavy, link up the difficulty that the technology is complicated, structural durability is poor.
Claims (8)
1. The utility model provides a prefabricated UHPC lattice type bridge pier stud structure of assembling, includes capital construction, cushion cap, its characterized in that:
the pier column is formed by assembling and combining a plurality of UHPC (ultra high performance concrete) column bodies (1), the top of each UHPC column body (1) penetrates into a prefabricated hole of the column top structure to be fixed, and the bottom of each UHPC column body penetrates into a prefabricated hole of the bearing platform (11) to be fixed; all the UHPC columns (1) are fixedly connected into a whole through prefabricated horizontally arranged column connecting components (2).
2. The prefabricated assembled UHPC lattice type bridge pier column structure as claimed in claim 1, wherein the pier column comprises four UHPC column bodies (1) symmetrically arranged at four corners of the pier column, and the main bodies are fixedly connected through the connecting members.
3. The prefabricated assembled UHPC latticed bridge pier column structure as claimed in claim 1, wherein the top and bottom of the UHPC column body (1) are respectively provided with a plurality of circles of convex connecting keys (3) at different heights, the top structure and the bearing platform (11) are respectively provided with concave bearing slots corresponding to the positions of the UHPC column body (1), a plurality of circles of connecting keys (5) are arranged in the bearing slots corresponding to the connecting keys (3), the connecting keys (3) at the top and bottom of the UHPC column body (1) are respectively arranged in a staggered manner with the connecting keys (5) arranged in the top structure and the bearing platform (11), and UHPC slurry (4) is poured into the bearing slots for anchoring and fixing.
4. The prefabricated assembled UHPC lattice type bridge pier column structure of claim 1, wherein two adjacent UHPC columns (1) are connected into a whole through an inter-column connecting member (2); the UHPC column body (1) is a rectangular or circular column.
5. A prefabricated assembled UHPC lattice type bridge pier column structure according to claim 4, wherein the inter-column connecting members (2) comprise section steel, vertical connecting flange plates are fixed on two end edges of the transverse section steel, the section steel is fixed on the UHPC column (1) through the connecting flange plates, and a plurality of radial stiffening ribs are arranged between the connecting flange plates and the section steel for connection.
6. The prefabricated assembled UHPC lattice type bridge pier stud structure of claim 5, wherein a split anchor hole (12) is reserved on the UHPC column body (1), a split anchor (7) is inserted into the anchor hole (12), and both ends of the split anchor (7) extend out of the split anchor hole (12); the connecting flange plate is fixed at one end of the split anchor bolt (7) through a nut, and the other end of the connecting flange plate is fixed on the side wall of the UHPC column body (1) through the nut.
7. The prefabricated assembled UHPC lattice type bridge pier stud structure of claim 5, wherein an embedded anchor bolt (9) is arranged on the UHPC column body (1), and the connecting flange plate is fixed at the end of the embedded anchor bolt (9) through a nut.
8. A prefabricated assembled UHPC lattice type bridge pier structure according to claim 1, wherein the pier structure is adapted for use as a middle pier or a utility pier of a bridge.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921802040.2U CN211312176U (en) | 2019-10-24 | 2019-10-24 | Prefabricated UHPC lattice formula bridge pier column structure of assembling |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629664A (en) * | 2019-10-24 | 2019-12-31 | 北京市市政工程设计研究总院有限公司 | Prefabricated assembled UHPC lattice type bridge pier column structure and construction method thereof |
| CN112376408A (en) * | 2020-11-18 | 2021-02-19 | 福州大学 | UHPC hollow column pier and construction method thereof |
| CN116377862A (en) * | 2023-02-14 | 2023-07-04 | 保利长大工程有限公司 | Joint construction of prefabricated component pier column, bearing platform and capping beam and testing method thereof |
-
2019
- 2019-10-24 CN CN201921802040.2U patent/CN211312176U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110629664A (en) * | 2019-10-24 | 2019-12-31 | 北京市市政工程设计研究总院有限公司 | Prefabricated assembled UHPC lattice type bridge pier column structure and construction method thereof |
| CN112376408A (en) * | 2020-11-18 | 2021-02-19 | 福州大学 | UHPC hollow column pier and construction method thereof |
| CN116377862A (en) * | 2023-02-14 | 2023-07-04 | 保利长大工程有限公司 | Joint construction of prefabricated component pier column, bearing platform and capping beam and testing method thereof |
| CN116377862B (en) * | 2023-02-14 | 2024-03-29 | 保利长大工程有限公司 | Seam test method for prefabricated component pier column, bearing platform and capping beam |
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