CN107165056B - Anti-overturning steel bar bracket for cantilever bent cap concrete pouring and mounting method thereof - Google Patents
Anti-overturning steel bar bracket for cantilever bent cap concrete pouring and mounting method thereof Download PDFInfo
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- CN107165056B CN107165056B CN201710568504.7A CN201710568504A CN107165056B CN 107165056 B CN107165056 B CN 107165056B CN 201710568504 A CN201710568504 A CN 201710568504A CN 107165056 B CN107165056 B CN 107165056B
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
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- Civil Engineering (AREA)
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Abstract
The invention discloses an anti-overturning steel bar bracket for cantilever bent cap concrete pouring and an installation method thereof, and belongs to the field of building structure construction. The installation method sequentially comprises the steps of prefabricating steel bar holes, installing steel bars, installing brackets, installing main beams, installing tie beams and the like. The invention increases anti-capsizing measures, greatly reduces steel consumption, improves operation efficiency and reduces labor cost.
Description
Technical Field
The invention belongs to the field of building structure construction, and is suitable for high pier, in particular to concrete cast-in-situ construction when a capping beam cantilever is large.
Background
Currently, two types of bracket structures are generally adopted for cantilever capping beam concrete casting:
the floor type support is characterized by being of a steel structure, an embedded part is required to be arranged on a bearing platform, or a steel pipe pile of a supporting structure is directly driven into a soil layer, and the floor type support is good in stability. When the pier body is higher, the wall is required to be arranged on the pier body, so that the appearance of the pier body is influenced, and the economic benefit is poor.
The second type is a steel bar bracket, and the steel pipe pile is not adopted as a bearing structure in the structure of the type, so that a large amount of steel can be saved. The disadvantage is poor stability against capsizing.
Limitations of conventional bent cap brackets:
when the pier body is higher, the steel pipe pile of the floor type capping beam support needs to be driven into a soil layer or falls on a bearing platform, if the driven steel pipe pile is adopted as a bearing structure, corresponding pile driving and pile pulling equipment is needed, more manual resources are consumed, and the economic benefit of the structure is poor.
The steel bar type bent cap support has good economic benefit, but has poor stability and poor control of structural safety coefficient.
Disclosure of Invention
The invention aims at: the invention provides an anti-overturning steel bar bracket for cantilever bent cap concrete pouring and an installation method thereof, and aims at:
1) Under the condition that the adverse conditions of unbalanced load and the like generated by concrete pouring can be overcome, the steel bar support is improved, and anti-overturning measures are increased.
2) The structure has light dead weight, and can greatly reduce the steel consumption for the bent cap bracket with the same scale by adopting the structure.
3) The structure is very convenient to install and disassemble, improves the operation efficiency and reduces the labor cost.
The aim of the invention is achieved by the following technical scheme:
a antidumping steel bar support for cantilever bent cap concrete placement comprises bearing steel bar, antidumping steel bar, bracket, unloading piece, support roof beam and template system six parts, and pier body prefabricates the steel bar hole that supplies bearing steel bar and antidumping steel bar to pass, and the bearing steel bar sets up 2 piece at least along vertical bridge to the level, and antidumping steel bar sets up 1 at least along horizontal bridge to the level, and the bearing steel bar still passes the bracket and fixes the bracket in pier body side, and the bracket top is equipped with the main beam of support roof beam, and the main beam is supported by the unloading piece that locates between bracket and the main beam, and the tie beam of support roof beam sets up in pairs between two main beams in the pier body outside, and tie beam laminating pier body both sides and bolt fastening are on the main beam, and antidumping steel bar passes corresponding two tie beams and fixes between two tie beams.
According to the invention, the bracket system is used for bearing by the bearing steel bar, and the anti-overturning steel bar forms an integral stress system by the tie beam and the main cross beam, so that the overturning problem under the unfavorable conditions of unbalanced load and the like generated by concrete pouring is solved, and the anti-overturning steel bar is particularly suitable for concrete cast-in-situ construction when the cantilever of the capping beam is larger; meanwhile, on the basis of achieving the purposes, the novel hydraulic pressure type hydraulic pressure control device is simple in overall structure, low in cost and convenient and rapid to install and detach.
Alternatively, only one anti-toppling steel bar is used. In the scheme, only one anti-overturning steel rod is arranged, and if the cantilever of the bent cap is too large, a plurality of anti-overturning steel rods can be arranged on the transverse bridge.
Alternatively, a rubber plate is also inserted between the tie beam and the pier body. In this scheme, can guarantee that the support does not lead to the fact the damage to pier shaft surface.
Optionally, a distribution beam of the support beams and a formwork system are also provided above the main cross beam.
The method for installing the anti-overturning steel bar bracket for cantilever bent cap concrete pouring sequentially comprises the following steps of:
(1) when the pier body is constructed, steel rod holes for the bearing steel rods and the anti-overturning steel rods to pass through are reserved;
(2) and (3) mounting a bearing steel bar:
pushing the bearing steel bar into the steel bar hole to install the bearing steel bar;
(3) bracket and unloading block installation:
penetrating a bearing steel rod into the bracket hole for installing the bracket; the bracket is installed, and then the unloading block is installed, and the unloading block is connected with the bracket by adopting a welding line;
(4) the main cross beam and the tie beam of the support beam are installed:
the main beam and the tie beam are assembled on the ground, the tie beam is connected with the main beam through bolts, the assembled tie beam is integrally sleeved into the pier body through hoisting, and the tie beam and the unloading block are connected through welding seams;
(5) and (3) mounting an anti-overturning steel bar:
penetrating an anti-overturning steel rod through the steel rod hole and penetrating into the tie beam hole;
(6) a distribution beam, a template system and an operation platform for installing the support beam;
(7) and (5) pouring the concrete of the bent cap and removing the bracket.
Alternatively, a connecting plate is welded at the end of the tie beam in advance, and bolt holes are provided for bolting with the main beam.
The foregoing inventive subject matter and various further alternatives thereof may be freely combined to form a plurality of alternatives, all of which are employable and claimed herein; and the invention can be freely combined between the (non-conflicting choices) choices and between the choices and other choices. Various combinations will be apparent to those skilled in the art from a review of the present disclosure, and are not intended to be exhaustive or all of the present disclosure.
The invention has the beneficial effects that: the novel structure is adopted for the concrete bent cap with larger cantilever, so that the engineering cost can be greatly saved, and the construction efficiency can be greatly improved.
(1) The dead weight of the structure is light, and the cost is low:
the structure overcomes the defect of high manufacturing cost of the traditional floor type support structure and the defect of poor structural stability of the traditional steel bar support structure: because of adopting the anti-overturning measure, the stability problem of the bracket is well solved. Because the floor support is not used, the material is greatly saved, and the manufacturing cost is greatly reduced.
(2) The recycling of materials is realized to the greatest extent:
because the tie beam and the main beam are connected by bolts, the structure is easy to realize in the aspects of installation and dismantling, and the main beam and the tie beam can be recycled by combining engineering practice, so that the cost is greatly saved.
(3) The structural stress is reliable, and the bearing capacity of the existing material is utilized to the maximum extent:
the stress of the bracket structure under the condition of unbalanced load is analyzed through large finite element calculation, and the whole system has definite stress, reliable force transmission and convenient construction.
(4) Quickening the engineering progress:
because the support structure adopts standardization, the support can reduce a large amount of time in the process of installation and dismantling, and the engineering progress is greatly accelerated.
Drawings
FIG. 1 is a schematic view of a cross-bridge arrangement of a stent in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a longitudinal bridge arrangement of a stent according to an embodiment of the present invention;
FIG. 3 is a schematic view of a planar arrangement of steel bars according to an embodiment of the present invention;
FIG. 4 is a schematic view of a tie beam local reinforcement structure according to an embodiment of the present invention;
FIG. 5 is a schematic view of a reinforcing plate structure of a tie beam local reinforcement of an embodiment of the present invention;
wherein 1 is a bearing steel bar, 2 is an anti-overturning steel bar, 21 is a steel bar hole, 3 is a bracket, 4 is an unloading block, 5 is a pier body, 6 is a main beam, 7 is a tie beam, 71 is a reinforcing plate, 72 is a stiffening plate, 8 is a distributing beam, 9 is a rubber plate, 10 is a bearing platform, 11 is a truss, 12 is a guardrail, and 13 is a cover beam to be poured.
Detailed Description
The following non-limiting examples illustrate the invention.
Referring to fig. 1 to 3, an anti-overturning steel bar bracket for cantilever capping beam concrete pouring is composed of a bearing steel bar 1, an anti-overturning steel bar 2, a bracket 3, an unloading block 4, a bracket beam and a template system, wherein a pier body 5 is prefabricated with steel bar holes for the bearing steel bar 1 and the anti-overturning steel bar 2 to pass through, at least 2 (2 as shown in the drawing of the embodiment) bearing steel bars 1 are horizontally arranged along a longitudinal bridge, at least 1 anti-overturning steel bar 2 is horizontally arranged along a transverse bridge, the bearing steel bar 1 also passes through the bracket 3 to fix the bracket 3 on the side face of the pier body 5, a main beam 6 of the bracket beam is arranged above the bracket 3, the main beam 6 is supported by the unloading block 4 arranged between the bracket 3 and the main beam 6, a tie beam 7 of the bracket beam is pairwise arranged between the two main beams 6 on the outer side of the pier body 5, the tie beam 7 is attached to two sides of the pier body 5 and is fixed on the main beam 6 by bolts, and the anti-overturning steel bar 2 passes through the corresponding two tie beams 7 to be fixed between the two tie beams 7. A plurality of stiffening plates are further arranged on the main beam 6 to strengthen the main beam, and a distribution beam 8 of the support beam and a template system are further arranged on the main beam 6. As shown in the drawings of the embodiment, if the cantilever of the bent cap is too large, a plurality of anti-overturning steel bars 2 can be arranged at the transverse bridge. In order to ensure that the bracket does not damage the surface of the pier body 5, a rubber plate 9 is also inserted between the tie beam 7 and the pier body 5. Meanwhile, as shown in fig. 4 and 5, the arrow in fig. 5 is in the direction of approaching the pier body, and the steel bar holes 21 penetrating through the anti-overturning steel bars 2 on the tie beam 7 are further locally reinforced, and the reinforcing plates 71 attached to the web plates of the tie beam 7 at the positions of the steel bar holes 21 and the stiffening plates 72 surrounding the periphery of the steel bar holes 21 are included.
As an example, taking a bridge approach capping beam with a vertical dimension of 8.5m×2m and a thickness of 2.6m as an example, the following structural composition is introduced:
the capping beam bracket adopts a supporting system that a bearing steel rod 1 is inserted into a pier body 5 to set brackets 3; the main cross beam 6 of the support beam adopts H-shaped steel of HN890 multiplied by 299; the longitudinal beam adopts a worker 20a as a distribution beam 8; in order to ensure the stability of the anti-overturning of the support, tie beams 7 are arranged between the main beams 6 on the outer sides of the pier body 5, anti-overturning steel bars 2 are adopted between the two tie beams 7 to penetrate, and meanwhile, in order to ensure that the support does not damage the surface of the pier body 5, a 20mm rubber plate 12 is inserted between the tie beams 7 and the pier body 5.
The construction method of the anti-overturning steel bar bracket for cantilever bent cap concrete pouring comprises the following steps:
when the pier body 5 is constructed, steel rod holes for the bearing steel rods 1 and the anti-overturning steel rods 2 to pass through are prefabricated, and the levelness and the spacing of the steel rods are controlled.
(1) And (3) mounting a bearing steel bar 1:
the bearing steel bar 1 is installed by adopting a climbing vehicle, the bearing steel bar 1 is placed into the climbing vehicle and lifted to the steel bar hole, and workers push the bearing steel bar 1 into the steel bar hole to install the bearing steel bar 1.
(2) Bracket 3 and unloading piece 4 installation:
the bracket 3 is installed by adopting a 50T automobile crane to cooperate with a climbing vehicle to work, the bracket 3 is hung to the bearing steel rod 1, and an operator penetrates the bearing steel rod 1 into a bracket 3 hole to install the bracket 3. And after the bracket 3 is installed, the unloading block 4 is installed, and the unloading block 4 is connected with the bracket 3 by adopting a welding line.
(3) The main beam 6 and the tie beam 7 of the support beam are mounted:
the main beam 6 and the tie beam 7 are assembled on the ground, the tie beam 7 and the main beam 6 are connected by bolts (connecting plates are welded at the end parts of the tie beam 7 in advance and are provided with bolt holes, so that the assembly and disassembly are convenient), the pier body 5 is integrally sleeved into the unloading block 4 through a crane after the assembly, and the main beam 6 and the unloading block 4 are connected by welding seams.
(4) And (3) mounting an anti-overturning steel bar 2:
the anti-overturning steel bar 2 is also installed by adopting a climbing vehicle, the anti-overturning steel bar 2 is placed into the climbing vehicle and lifted to the steel bar hole, and workers push the anti-overturning steel bar 2 into the steel bar hole, pass through the steel bar hole and penetrate into the tie beam 7 hole.
(5) Distribution beam 8 for mounting support beam, template system and working platform:
is a conventional process and will not be described again.
(6) Cover beam concrete pouring and bracket removing:
is a conventional process and will not be described again.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (6)
1. A antidumping bar support for cantilever bent cap concrete placement, its characterized in that: the bridge pier comprises six parts, namely a bearing steel bar, an anti-overturning steel bar, corbels, unloading blocks, support beams and a template system, wherein steel bar holes for the bearing steel bar and the anti-overturning steel bar to pass through are prefabricated in the bridge pier body, at least 2 bearing steel bars are horizontally arranged along a longitudinal bridge, at least 1 anti-overturning steel bar is horizontally arranged along a transverse bridge, the corbels are further penetrated through the bearing steel bars to fix the corbels on the side surface of the pier body, a main cross beam of the support beams is arranged above the corbels, the main cross beam is supported by the unloading blocks arranged between the corbels and the main cross beam, the tie beams of the support beams are arranged between the two main cross beams on the outer side of the pier body in pairs, the tie beams are attached to the two sides of the pier body and are fixed on the main cross beams through the corresponding two tie beams, and the steel bar holes penetrating through the anti-overturning steel bars on the tie beams are locally reinforced.
2. The anti-overturning steel bar bracket for cantilever capping beam concrete casting as claimed in claim 1, wherein: only one anti-overturning steel bar.
3. The anti-overturning steel bar bracket for cantilever capping beam concrete casting as claimed in claim 1, wherein: rubber plates are also inserted between the tie beams and the pier body.
4. The anti-overturning steel bar bracket for cantilever capping beam concrete casting as claimed in claim 1, wherein: and a distribution beam of the support beam and a template system are arranged on the main beam.
5. A method of installing an anti-overturning steel bar bracket for cantilever capping beam concreting as claimed in any one of claims 1 to 4, characterised by the following steps in sequence:
(1) when the pier body is constructed, steel rod holes for the bearing steel rods and the anti-overturning steel rods to pass through are reserved;
(2) and (3) mounting a bearing steel bar:
pushing the bearing steel bar into the steel bar hole to install the bearing steel bar;
(3) bracket and unloading block installation:
penetrating a bearing steel rod into the bracket hole for installing the bracket; the bracket is installed, and then the unloading block is installed, and the unloading block is connected with the bracket by adopting a welding line;
(4) the main cross beam and the tie beam of the support beam are installed:
the main beam and the tie beam are assembled on the ground, the tie beam is connected with the main beam through bolts, the assembled tie beam is integrally sleeved into the pier body through hoisting, and the tie beam and the unloading block are connected through welding seams;
(5) and (3) mounting an anti-overturning steel bar:
penetrating an anti-overturning steel rod through the steel rod hole and penetrating into the tie beam hole;
(6) a distribution beam, a template system and an operation platform for installing the support beam;
(7) and (5) pouring the concrete of the bent cap and removing the bracket.
6. The method for installing an anti-overturning steel bar bracket for cantilever capping beam concrete casting according to claim 5, wherein the method comprises the following steps: the connecting plates are welded at the end parts of the tie beams in advance, and bolt holes are arranged for being connected with the main cross beam through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710568504.7A CN107165056B (en) | 2017-07-13 | 2017-07-13 | Anti-overturning steel bar bracket for cantilever bent cap concrete pouring and mounting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710568504.7A CN107165056B (en) | 2017-07-13 | 2017-07-13 | Anti-overturning steel bar bracket for cantilever bent cap concrete pouring and mounting method thereof |
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| Publication Number | Publication Date |
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| CN107165056A CN107165056A (en) | 2017-09-15 |
| CN107165056B true CN107165056B (en) | 2023-08-15 |
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| CN201710568504.7A Active CN107165056B (en) | 2017-07-13 | 2017-07-13 | Anti-overturning steel bar bracket for cantilever bent cap concrete pouring and mounting method thereof |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108978475A (en) * | 2018-07-18 | 2018-12-11 | 芜湖青悠静谧环保科技有限公司 | A kind of bridge hoisting buffering positioning base |
| CN109736202A (en) * | 2019-01-18 | 2019-05-10 | 广州市公路工程公司 | Great cantilever bent cap Bracket method for construction method |
| CN111827116A (en) * | 2019-04-15 | 2020-10-27 | 中交路桥建设有限公司 | Combined high pier capping beam construction support |
| CN111395204A (en) * | 2020-04-27 | 2020-07-10 | 浙江交工集团股份有限公司 | Prestressed cantilever support structure of large cantilever bent cap and construction method |
| CN112176877A (en) * | 2020-09-29 | 2021-01-05 | 上海城建市政工程（集团）有限公司 | Truss fixing mechanism on pier stand column |
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| CN207062778U (en) * | 2017-07-13 | 2018-03-02 | 中交二航局第四工程有限公司 | Antidumping rod iron support for cantilever bent cap concreting |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101324056B (en) * | 2008-08-06 | 2011-01-12 | 中铁大桥局股份有限公司 | Upside suspension type moving die carrier |
| CN201722704U (en) * | 2010-03-30 | 2011-01-26 | 山东大学 | Pre-stressed cantilever counter rib holding retaining wall |
| CN101922143B (en) * | 2010-07-02 | 2012-02-01 | 上海市第二市政工程有限公司 | Construction method of bent cap |
| CN202280024U (en) * | 2011-10-28 | 2012-06-20 | 中铁十六局集团有限公司 | No.0 block bracket for continuous rigid frame bridge with two-thin-wall piers |
| CN203440757U (en) * | 2013-09-15 | 2014-02-19 | 中铁一局集团有限公司 | Corbel bracket for cast-in-place concrete construction of top of pier |
| CN204510005U (en) * | 2015-01-20 | 2015-07-29 | 中国建筑第七工程局有限公司 | A kind of Coping Construction operating platform |
| CN106120562A (en) * | 2016-07-08 | 2016-11-16 | 杭州市市政工程集团有限公司 | Overpass rod iron bracket bent cap support for shuttering integral hoisting construction method |
| CN206189275U (en) * | 2016-10-17 | 2017-05-24 | 中建交通建设集团有限公司 | Bridge pier bent cap cast -in -situ construction's awl beiLei beam formula of climbing support |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207062778U (en) * | 2017-07-13 | 2018-03-02 | 中交二航局第四工程有限公司 | Antidumping rod iron support for cantilever bent cap concreting |
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