CN211312164U - Segment prefabricated assembled bent cap - Google Patents
Segment prefabricated assembled bent cap Download PDFInfo
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- CN211312164U CN211312164U CN201921582911.4U CN201921582911U CN211312164U CN 211312164 U CN211312164 U CN 211312164U CN 201921582911 U CN201921582911 U CN 201921582911U CN 211312164 U CN211312164 U CN 211312164U
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Abstract
The utility model discloses a segment prefabricated assembled bent cap, which comprises at least two fulcrum segments and a plurality of middle segments; a middle gap is formed between each middle section and the adjacent middle section or the fulcrum section; each middle gap is provided with a bonding seam; a plurality of mutually parallel corrugated pipes extending along the stress direction of the bent cap are arranged in each fulcrum section and each middle section; a corrugated pipe connecting pipe is arranged in each middle gap corresponding to each corrugated pipe; the corrugated pipes and the corresponding corrugated pipe connecting pipes are connected to form a plurality of parallel prestressed channels. During construction, the positions of the plurality of middle sections are adjusted by utilizing the construction cross beam, so that each two adjacent middle sections leave enough operating space for installing the corrugated pipe connecting pipe. The utility model discloses a construction space is created in the installation of the bellows connecting pipe between the festival section in the middle of each, realizes the bent cap festival section miniaturization, the requirement that can be under construction fast simultaneously.
Description
Technical Field
The utility model relates to a bent cap construction technical field, in particular to bent cap is assembled in prefabricated of segment.
Background
In the existing capping beam construction, due to the limitation of hoisting and transportation capacity in a construction site, a large-size capping beam is difficult to construct by adopting a prefabrication and assembly process. In order to expand the application range of the large-size cover beam, a sectional prefabrication mode is generally adopted. The common way of segmental prefabrication is as follows:
the cantilever section is prefabricated in sections, and after the middle section is hoisted, the cantilever section is assembled.
And secondly, reserving a wet joint at the middle section of the precast bent cap, reducing the alignment precision of the middle section and realizing the prefabrication of the bent cap at the middle section.
In the first construction method, the middle section cannot be prefabricated in sections, so that the problems of large size and heavy weight of the middle prefabricated section cannot be solved. The second construction method has wet joints and long on-site binding, pouring and maintaining time.
Therefore, the existing capping beam prefabrication method needs to be improved, the defects of the prior art are overcome, and the construction efficiency is improved.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned defect of prior art, the utility model provides a bent cap is assembled in segmental prefabrication, the purpose of realization is that the construction of assembling of prefabricated segmental does not need on-the-spot ligature reinforcing bar, and construction speed is fast, can realize the pier bent cap of various forms and divide small-size prefabricated segmental according to the site operation condition like double-column pier, three-column pier, four-column pier and five-column pier bent cap.
In order to achieve the purpose, the utility model discloses a segment prefabricated assembled bent cap, which is arranged on a pier; the cover beam comprises at least two fulcrum sections and a plurality of middle sections, and the fulcrum sections and the middle sections are concrete prefabricated parts;
the number of the fulcrum sections is matched with that of the bridge piers, and each fulcrum section is arranged at the upper end of the corresponding bridge pier;
a plurality of middle sections are arranged between every two adjacent fulcrum sections, and a middle gap exists between each middle section and the adjacent middle section or the fulcrum sections;
each middle gap is formed by pouring concrete material, epoxy resin glue and concrete mixed material, ultra-high performance concrete or high-ductility concrete to form a bonding joint;
a plurality of mutually parallel corrugated pipes extending along the stress direction of the bent cap are arranged in each fulcrum section and each middle section; a corrugated pipe connecting pipe is arranged in each middle gap corresponding to each corrugated pipe;
the corrugated pipes and the corresponding corrugated pipe connecting pipes are connected to form a plurality of parallel prestressed channels, and each prestressed channel is internally provided with prestressed steel bundles or finish-rolled twisted steel bars.
Preferably, a plurality of cantilever segments are arranged on the outer side of each fulcrum segment; an epoxy resin adhesive joint is arranged between each cantilever segment and the adjacent fulcrum segment or cantilever segment;
and a plurality of corrugated pipes matched with each fulcrum section and each intermediate section are arranged in each cantilever section and communicated with the prestress channels of the corresponding fulcrum sections and the corresponding intermediate sections, and the prestress steel beams or the finish rolling threaded steel bars are shared.
Preferably, when the middle gap is less than 200mm, the stressed main steel bars of the cover beam are not connected, and no stirrups are arranged.
Preferably, the middle gap is a vertical seam, a diagonal seam or a corbel seam.
The utility model has the advantages that:
the utility model discloses utilize the clearance between the prefab, realize the lateral position adjustment of a plurality of middle sections with the crossbeam in the bent cap hoist and mount construction, for the installation of the bellows connecting pipe between the section creates the construction space in the middle of each, realize the miniaturization of bent cap section, the requirement that can be under construction fast simultaneously.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic structural diagram of an embodiment of the present invention.
Fig. 2 shows a schematic diagram of a state of completing the hoisting and installation of the fulcrum segments in an embodiment of the present invention.
Fig. 3 shows a schematic state diagram of the hoisting jib segment and the intermediate segment in an embodiment of the present invention.
Fig. 4 is a schematic diagram illustrating a state in which the installation of the boom segment is completed according to an embodiment of the present invention.
Fig. 5 is a schematic view illustrating a state of installing the bellows joint pipe by adjusting positions of a plurality of intermediate segments according to an embodiment of the present invention.
Fig. 6 shows a schematic diagram of a state of completing construction in an embodiment of the present invention.
Detailed Description
Examples
As shown in fig. 1, the segment precast assembled capping beam is arranged on a pier; the bent cap comprises at least two fulcrum sections 1 and a plurality of middle sections 3, and the fulcrum sections 1 and the middle sections 3 are concrete prefabricated parts;
the number of the fulcrum sections 1 is matched with that of the piers, and each fulcrum section 1 is arranged at the upper end of the corresponding pier;
a plurality of middle sections 3 are arranged between every two adjacent fulcrum sections 1, and a middle gap 5 is formed between each middle section 3 and the adjacent middle section 3 or the fulcrum sections 1;
each middle gap 5 is formed by pouring concrete material, epoxy resin glue and concrete mixed material, ultra-high performance concrete or high-ductility concrete to form a bonding joint;
a plurality of mutually parallel corrugated pipes extending along the stress direction of the bent cap are arranged in each fulcrum section 1 and each middle section 3; a corrugated pipe connecting pipe 6 is arranged in each middle gap 5 corresponding to each corrugated pipe;
the corrugated pipes and the corresponding corrugated pipe connecting pipes 6 are connected to form a plurality of parallel prestressed channels, and each prestressed channel is internally provided with prestressed steel bundles 7 or finish-rolled twisted steel bars.
The principle of the utility model lies in that a middle gap 5 is arranged between each middle section 3 and the adjacent middle section 3 or the fulcrum section 1; the transverse position of the middle sections 3 is adjusted by using the cross beam in the cover beam hoisting construction, a construction space is created for the installation of the corrugated pipe connecting pipe 6 between each middle section 3, the cover beam sections are miniaturized, and meanwhile, the requirement of rapid construction can be met.
In some embodiments, a plurality of cantilever segments 2 are provided outside each fulcrum segment 1; an epoxy resin adhesive joint 4 is arranged between each cantilever segment 2 and the adjacent fulcrum segment 1 or cantilever segment 2;
each cantilever segment 2 is internally provided with a plurality of corrugated pipes matched with each fulcrum segment 1 and each intermediate segment 3, and is communicated with the prestressed channels of the corresponding fulcrum segment 1 and the corresponding intermediate segment 3 to share the prestressed steel bundles 7 or finish-rolled twisted steel bars.
In some embodiments, when the intermediate gap 5 is below 200mm, the stressed main rebars of the capping beam are not connected and no stirrups are arranged.
In some embodiments, the intermediate gap 5 is a vertical seam, a diagonal seam, or a corbel seam.
As shown in fig. 2 to 6, the utility model discloses still provide the construction method of the prefabricated bent cap of assembling of festival section, the step is as follows:
the method comprises the following steps: completing the construction of a bearing platform and piers, hoisting, installing a fulcrum section 1 on each pier, and installing a construction cross beam on the fulcrum section 1;
step two: hoisting the cantilever section 2 and the middle section 3 by using the construction beam;
step three: coating epoxy resin glue between each cantilever segment 2 and the adjacent cantilever segment 2 or the fulcrum segment 1 to form an epoxy resin glue bonding seam 4, tensioning the temporary prestress, and finishing prestress tensioning when the epoxy resin glue is extruded;
step four: the positions of the plurality of middle sections 3 are adjusted by using the construction cross beam, so that each two adjacent middle sections 3 leave enough operating space for installing the corrugated pipe connecting pipe 6; each intermediate section 3 is moved one by one and the bellows connecting tube 6 of each intermediate gap 5 is installed.
Step five: moving the middle section 3, adjusting the width of each middle gap 5 to the designed width, then pouring to form a bonding joint, and penetrating a prestressed steel bundle 7 or a finish-rolled twisted steel bar; and when the strength of the bonding joint reaches the design requirement, tensioning the prestressed steel bundle 7 or the finish rolling twisted steel, removing the temporary prestress, removing the construction cross beam, and finishing the construction of the cover beam.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (4)
1. The segment prefabricated assembled capping beam is arranged on the bridge pier; the method is characterized in that: the bent cap comprises at least two fulcrum sections (1) and a plurality of middle sections (3), and the fulcrum sections (1) and the middle sections (3) are all precast concrete;
the number of the fulcrum sections (1) is matched with that of the piers, and each fulcrum section (1) is arranged at the upper end of the corresponding pier;
a plurality of middle sections (3) are arranged between every two adjacent fulcrum sections (1), and a middle gap (5) is formed between each middle section (3) and the adjacent middle section (3) or the fulcrum sections (1);
each middle gap (5) is formed by pouring concrete material, epoxy resin glue and concrete mixed material, ultra-high performance concrete or high-ductility concrete to form a bonding joint;
a plurality of mutually parallel corrugated pipes extending along the stress direction of the bent cap are arranged in each fulcrum section (1) and each middle section (3); a corrugated pipe connecting pipe (6) is arranged in each middle gap (5) corresponding to each corrugated pipe;
the corrugated pipes and the corresponding corrugated pipe connecting pipes (6) are connected to form a plurality of parallel prestressed channels, and each prestressed channel is internally provided with prestressed steel bundles (7) or finish-rolled twisted steel bars.
2. The segmental precast split bent cap according to claim 1, characterized in that a plurality of cantilever segments (2) are provided at the outer side of each fulcrum segment (1); an epoxy resin adhesive seam (4) is arranged between each cantilever segment (2) and the adjacent fulcrum segment (1) or cantilever segment (2);
and a plurality of corrugated pipes matched with each fulcrum section (1) and each intermediate section (3) are arranged in each cantilever section (2), are communicated with the prestress channels of the corresponding fulcrum sections (1) and the corresponding intermediate sections (3), and share the prestress steel bundles (7) or the finish rolling threaded steel bars.
3. The segmental precast erection capping beam of claim 1, wherein, when the intermediate gap (5) is below 200mm, the stressed main rebars of the capping beam are not connected and are not provided with stirrups.
4. The segmental precast erection capping beam of claim 1, wherein the intermediate gap (5) employs vertical, diagonal or corbel seams.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921582911.4U CN211312164U (en) | 2019-09-23 | 2019-09-23 | Segment prefabricated assembled bent cap |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921582911.4U CN211312164U (en) | 2019-09-23 | 2019-09-23 | Segment prefabricated assembled bent cap |
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| CN211312164U true CN211312164U (en) | 2020-08-21 |
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| CN201921582911.4U Active CN211312164U (en) | 2019-09-23 | 2019-09-23 | Segment prefabricated assembled bent cap |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565506A (en) * | 2019-09-23 | 2019-12-13 | 上海市城市建设设计研究总院（集团）有限公司 | Segmental prefabricated assembled bent cap and construction method thereof |
| CN112112052A (en) * | 2020-08-26 | 2020-12-22 | 绍兴文理学院 | Prefabricated bent cap longitudinal connecting system for assembled beam bridge and construction method of prefabricated bent cap longitudinal connecting system |
-
2019
- 2019-09-23 CN CN201921582911.4U patent/CN211312164U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565506A (en) * | 2019-09-23 | 2019-12-13 | 上海市城市建设设计研究总院（集团）有限公司 | Segmental prefabricated assembled bent cap and construction method thereof |
| CN110565506B (en) * | 2019-09-23 | 2024-04-09 | 上海市城市建设设计研究总院（集团）有限公司 | Segmental prefabricated assembled bent cap and construction method thereof |
| CN112112052A (en) * | 2020-08-26 | 2020-12-22 | 绍兴文理学院 | Prefabricated bent cap longitudinal connecting system for assembled beam bridge and construction method of prefabricated bent cap longitudinal connecting system |
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