CN110565506A - Segmental prefabricated assembled bent cap and construction method thereof - Google Patents
Segmental prefabricated assembled bent cap and construction method thereof Download PDFInfo
- Publication number
- CN110565506A CN110565506A CN201910898931.0A CN201910898931A CN110565506A CN 110565506 A CN110565506 A CN 110565506A CN 201910898931 A CN201910898931 A CN 201910898931A CN 110565506 A CN110565506 A CN 110565506A
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- Prior art keywords
- fulcrum
- sections
- section
- construction
- segment
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Links
- 238000010276 construction Methods 0.000 title claims abstract description 45
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 239000003822 epoxy resin Substances 0.000 claims description 15
- 229920000647 polyepoxide Polymers 0.000 claims description 15
- 239000004567 concrete Substances 0.000 claims description 11
- 239000003292 glue Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000011374 ultra-high-performance concrete Substances 0.000 claims description 3
- 239000011178 precast concrete Substances 0.000 claims 1
- 238000009434 installation Methods 0.000 abstract description 4
- 238000009417 prefabrication Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
Abstract
the invention discloses a segmental prefabricated assembled bent cap and a construction method thereof, wherein the segmental prefabricated assembled bent cap 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 invention creates a construction space for the installation of the corrugated pipe connecting pipe between each middle section, realizes the miniaturization of the capping beam section and can meet the requirement of quick construction.
Description
Technical Field
The invention relates to the technical field of bent cap construction, in particular to a segmental prefabricated assembled bent cap and a construction method thereof.
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.
disclosure of Invention
In view of the defects in the prior art, the invention provides the segment prefabricated assembled capping beam and the construction method thereof, and aims to realize the purposes that the prefabricated segments are assembled without binding steel bars on site, the construction speed is high, and the pier capping beams in various forms, such as double-column piers, three-column piers, four-column piers and five-column pier capping beams, can be divided into small-sized prefabricated segments according to site construction conditions.
In order to achieve the purpose, the invention discloses a segment prefabricated and assembled capping beam, 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 invention also provides a construction method of the segment prefabricated assembled bent cap, which comprises the following steps:
The method comprises the following steps: the construction of a bearing platform and bridge piers is completed, a fulcrum section is hoisted and installed on each bridge pier, and a construction cross beam is installed on each fulcrum section;
step two: hoisting the cantilever sections and the middle sections by using the construction beam;
Step three: coating epoxy resin glue between each cantilever segment and the adjacent cantilever segment or fulcrum segment to form an epoxy resin glue bonding seam, tensioning the temporary prestress, and finishing prestress tensioning when the epoxy resin glue is extruded;
step four: adjusting the positions of the plurality of middle sections by using the construction cross beam, so that each two adjacent middle sections leave enough operating space for installing corrugated pipe connecting pipes; moving each of the intermediate sections one by one and installing the bellows connection tube of each intermediate gap.
Step five: moving the middle sections, adjusting the width of each middle gap to the designed width, then pouring to form a bonding joint, and penetrating a prestressed steel bundle or a finish-rolled twisted steel bar; and when the strength of the bonding joint reaches the design requirement, tensioning the prestressed steel bundle or the finish rolling twisted steel, removing the temporary prestress, removing the construction cross beam, and finishing the construction of the cover beam.
the invention has the beneficial effects that:
according to the invention, the transverse positions of the plurality of middle sections are adjusted by utilizing the gaps among the prefabricated members and utilizing the cross beams in the cover beam hoisting construction, a construction space is created for the installation of the corrugated pipe connecting pipe between each middle section, the cover beam sections are miniaturized, and meanwhile, the requirement of rapid construction can be met.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings 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 is a schematic view showing a state in which the lifting and mounting of the fulcrum section are completed in one embodiment of the present invention.
Fig. 3 shows a schematic view of the state of hoisting the boom section and the intermediate section in an embodiment of the invention.
fig. 4 is a schematic view showing a state where the installation of the boom segment is completed in one embodiment of the present invention.
fig. 5 is a schematic view illustrating a state where a bellows joint pipe is installed by adjusting positions of several intermediate segments according to an embodiment of the present invention.
fig. 6 is a schematic diagram showing a state where construction is completed in one 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 invention is that each intermediate section 3 and the adjacent intermediate section 3 or the fulcrum section 1 have an intermediate gap 5; 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 present invention further provides a construction method of the segmental precast assembled bent cap, which comprises the following steps:
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 detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (5)
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.
5. the construction method of the segmental precast assembled bent cap comprises the following steps:
the method comprises the following steps: the construction of a bearing platform and bridge piers is completed, a fulcrum section (1) is hoisted and installed on each bridge pier, and a construction cross beam is installed on each fulcrum section (1);
step two: hoisting the cantilever segment (2) and the middle segment (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 temporary prestress, and finishing prestress tensioning when the epoxy resin glue is extruded;
step four: adjusting the positions of a plurality of middle sections (3) by using a construction cross beam, and enabling each two adjacent middle sections (3) to leave enough operating space for installing a corrugated pipe connecting pipe (6); -moving each of said intermediate sections (3) one by one and mounting said bellows connection tube (6) of each intermediate gap (5).
step five: moving the middle sections (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; 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898931.0A CN110565506B (en) | 2019-09-23 | 2019-09-23 | Segmental prefabricated assembled bent cap and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898931.0A CN110565506B (en) | 2019-09-23 | 2019-09-23 | Segmental prefabricated assembled bent cap and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110565506A true CN110565506A (en) | 2019-12-13 |
| CN110565506B CN110565506B (en) | 2024-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910898931.0A Active CN110565506B (en) | 2019-09-23 | 2019-09-23 | Segmental prefabricated assembled bent cap and construction method thereof |
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| Country | Link |
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| CN (1) | CN110565506B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431138A (en) * | 2020-11-17 | 2021-03-02 | 上海市基础工程集团有限公司 | Accurate positioning and rapid assembling method for dry-joint cantilever bent cap |
| CN113308995A (en) * | 2021-04-23 | 2021-08-27 | 浙江交工集团股份有限公司 | Prefabricated bent cap subsection wet joint method |
| CN113417217A (en) * | 2021-07-27 | 2021-09-21 | 苏交科集团股份有限公司 | Assembling process of light segment prefabricated assembled bent cap |
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| IL123543A0 (en) * | 1998-03-04 | 1998-10-30 | Meiranz Benjamin | A composite bridge superstructure with precast deck elements |
| CN108103926A (en) * | 2017-12-25 | 2018-06-01 | 中交第二公路勘察设计研究院有限公司 | Assembled hollow pier and its construction method based on end plate welding |
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-
2019
- 2019-09-23 CN CN201910898931.0A patent/CN110565506B/en active Active
Patent Citations (5)
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| CN108103926A (en) * | 2017-12-25 | 2018-06-01 | 中交第二公路勘察设计研究院有限公司 | Assembled hollow pier and its construction method based on end plate welding |
| CN108149580A (en) * | 2017-12-29 | 2018-06-12 | 广州瀚阳工程咨询有限公司 | Based on cantilever balance assembly without bearing full-bridge precast segment method |
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Non-Patent Citations (1)
| Title |
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| 葛继平;梅德磊;闫兴非;王志强;: "预制拼装盖梁施工方式对比分析", 应用技术学报, no. 01 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112431138A (en) * | 2020-11-17 | 2021-03-02 | 上海市基础工程集团有限公司 | Accurate positioning and rapid assembling method for dry-joint cantilever bent cap |
| CN113308995A (en) * | 2021-04-23 | 2021-08-27 | 浙江交工集团股份有限公司 | Prefabricated bent cap subsection wet joint method |
| CN113417217A (en) * | 2021-07-27 | 2021-09-21 | 苏交科集团股份有限公司 | Assembling process of light segment prefabricated assembled bent cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110565506B (en) | 2024-04-09 |
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