CN104389270A - Construction method for large strip-type corbel - Google Patents
Construction method for large strip-type corbel Download PDFInfo
- Publication number
- CN104389270A CN104389270A CN201410654629.8A CN201410654629A CN104389270A CN 104389270 A CN104389270 A CN 104389270A CN 201410654629 A CN201410654629 A CN 201410654629A CN 104389270 A CN104389270 A CN 104389270A
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- bracket
- encorbelmenting
- steel bar
- build
- bending resistance
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Classifications
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction method for a large strip-type corbel, comprising the following steps of using I-shaped steels, which meet the bearing requirements, to build a temporary truss as a beam bottom supporting platform; applying the block casting during the concrete casting process, and creating supporting and reinforcing conditions for post-cast blocks by means of increasing the torsional strength and bending strength of temporary section structures of precast blocks. According to the invention, a method for building a temporary supporting and working platform by utilizing a cast pier structure is used to finish the casting of part precast blocks, and a casting condition is provided for the subsequent structure concrete casting by means of prearranging two types of stress reinforcing steel bars and template tie bars with torsion strength and bending strength in the precast blocks. According to the construction method for the large strip-type corbel, a construction step of building all-round scaffolds on the ground is prevented, the construction supporting problem of suspending part concrete is solved, and the effects of economy, safety, reliability and construction period shortening are achieved.
Description
[technical field]
The present invention relates to technical field of concrete construction, particularly a kind of construction method of large-scale strip-type bracket.
[background technology]
For high overhung construction, usually adopt the mode set up full hall scaffold and support, traditional construction method long construction period, engineering quantity are large, and construction environment requires high.Particularly building overhung construction up on the dam of up to a hundred meters, needing to build the high scaffold of rice up to a hundred, be substantially difficult to realize.
[summary of the invention]
The object of the present invention is to provide a kind of construction method of large-scale strip-type bracket, it avoids the working procedure that conventional method needs to set up full hall scaffold when work high above the ground and suspention concrete structure construction.By setting up temporary steel truss, create the interim scope of operation and template fixed point, come antitorque, the anti-bending strength of Concrete Structure temporary section structure by increasing structure reinforcing bars, fix overhung construction template by preset lace, the method has reasonably saved duration and cost.
To achieve these goals, the present invention adopts following technical scheme:
A construction method for large-scale strip-type bracket, comprises the following steps:
A, set up temporary truss frame structure
Prior pre-buried iron plate on pier and abutment pier in built, makes i iron purlin and frame is welded on pre-buried iron plate, forms temporary truss frame structure between middle pier and abutment pier;
B, build tee girder
Temporary truss frame structure builds template, builds tee girder;
C, build rectangular beam
Utilize the fixation of temporary truss frame structure and T-shaped beam to build template for building rectangular beam, and build rectangular beam steel bar stress framework in a template, rectangular beam steel bar stress framework fixes some preset laces; Build bracket bending resistance steel bar framework of encorbelmenting, bracket bending resistance steel bar framework one end of encorbelmenting is arranged in rectangular beam to be built, and the other end stretches out outside rectangular beam to be built; Then rectangular beam is built;
D, build bracket of encorbelmenting
One end of some template lacing wires is fixedly connected with preset lace, end unsettled for template lacing wire is passed template and is bolted, forming the soffit formwork for building bracket of encorbelmenting, in temporary truss frame structure, then building other templates of building bracket of encorbelmenting, then build bracket of encorbelmenting;
E, build panel
Temporary truss frame structure, tee girder, rectangular beam and bracket of encorbelmenting build the template of building panel, then builds panel.
Rectangular beam steel bar stress framework comprise multiple be arranged in parallel along rectangular beam length direction L-type reinforcing bar, multiplely to extend and the longitudinal reinforcement fixing with L-type reinforcement welding along rectangular beam length direction; Rectangular beam steel bar stress framework is built in rectangular beam.
Bracket bending resistance steel bar framework of encorbelmenting comprise some be arranged in parallel along rectangular beam length direction horizontal bending resistance reinforcing bar, multiplely to extend and the longitudinal bending resistance reinforcing bar fixing with horizontal bending resistance reinforcement welding along rectangular beam length direction; Encorbelment one end of bracket bending resistance steel bar framework and rectangular beam steel bar stress frame welding is fixed or is built in rectangular beam, and the other end is arranged in bracket of encorbelmenting.
Template lacing wire and the bracket bending resistance steel bar framework part be arranged in outside rectangular beam of encorbelmenting are built in bracket of encorbelmenting; The top of the close bracket of encorbelmenting of bracket bending resistance steel bar framework of encorbelmenting.
Described temporary truss frame structure is many Pin splayed i iron purlin.
Tee girder and two ends, rectangular beam elongatedness direction are all fixed on middle pier and abutment pier.
A construction method for large-scale strip-type bracket, comprises the following steps: build the template for casting beams, and builds in a template outside the steel mesh reinforcement for casting beams and build beam stress steel bar framework, and beam stress steel bar framework fixes some preset laces; Build bracket bending resistance steel bar framework of encorbelmenting, bracket bending resistance steel bar framework one end of encorbelmenting is arranged in treats casting beams, and the other end stretches out to be treated outside casting beams; Then casting beams; One end of some template lacing wires is fixedly connected with preset lace, end unsettled for template lacing wire is passed template and is bolted, forming the soffit formwork for building bracket of encorbelmenting, then building other templates of building bracket of encorbelmenting, then building bracket of encorbelmenting.
Beam stress steel bar framework comprise multiple be arranged in parallel along beam length direction L-type reinforcing bar, multiplely to extend along beam length direction and the longitudinal reinforcement fixing with L-type reinforcement welding; Beam stress steel bar framework is built in rectangular beam; Bracket bending resistance steel bar framework of encorbelmenting comprise some be arranged in parallel along beam length direction horizontal bending resistance reinforcing bar, multiplely to extend along beam length direction and the longitudinal bending resistance reinforcing bar fixing with horizontal bending resistance reinforcement welding; Encorbelment one end of bracket bending resistance steel bar framework and beam stress steel bar framework is welded and fixed or builds Yu Liangzhong, and the other end is arranged in bracket of encorbelmenting.
The top of the close bracket of encorbelmenting of bracket bending resistance steel bar framework of encorbelmenting.
Relative to prior art, the present invention has following beneficial effect: the present invention utilizes temporary truss frame structure, adopt the method for block placement, when building, concrete temporary section structure is antitorque, bending resistance requirement to meet for arrangement reinforcing bar, utilize preset lace fixedly to encorbelment bracket template, realize the concrete construction of cantilevered structure; Utilize at rectangular beam and to build in bracket of encorbelmenting the bending resistance that arrangement reinforcing bar in advance forms bracket of encorbelmenting and build panel.The present invention is particularly suitable for that construction environment is at the scene poor, construction period is tight etc. and does not possess when setting up full hall scaffold using.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing and example, the present invention will be further described.
Fig. 1 is truss floor map of the present invention.
Fig. 2 is truss elevational schematic view of the present invention.
Fig. 3 is the top view build tee girder and rectangular beam in temporary truss frame structure after.
Fig. 4 is adding structural reinforcing bar schematic diagram of the present invention;
Fig. 5 is the enlarged diagram of adding structural reinforcing bar;
Fig. 6 is the top partial view diagram of adding structural reinforcing bar.
Fig. 7 is block placement schematic diagram of the present invention.
[detailed description of the invention]
Refer to shown in Fig. 1 to Fig. 7, the construction method of a kind of large-scale strip-type bracket of the present invention, comprises the following steps:
A, set up temporary truss frame structure
Refer to shown in Fig. 1 and Fig. 2, prior pre-buried iron plate 2 on pier 3 and abutment pier 4 in built, make meet load bearing requirements many Pin "eight" shape i iron truss welding on pre-buried iron plate 2, form temporary truss frame structure 1, as temporary support job platform;
B, build tee girder 5
Refer to shown in Fig. 3 to Fig. 7, temporary truss frame structure 1 builds template, build tee girder 5;
C, build rectangular beam 6
Utilize the fixation of temporary truss frame structure 1 and T-shaped beam 5 to build template for building rectangular beam 6, and build in a template outside the steel mesh reinforcement for building rectangular beam 6 and build rectangular beam steel bar stress framework 9; Rectangular beam steel bar stress framework 9 comprise multiple be arranged in parallel along rectangular beam 6 length direction L-type reinforcing bar 13, multiplely to extend and the longitudinal reinforcement 14 fixing with L-type reinforcement welding along rectangular beam 6 length direction; Rectangular beam steel bar stress framework 9 is a L-shaped reinforcing bar grid framework, builds in rectangular beam 6.Weld multiple preset lace 11 respectively in rectangular beam steel bar stress framework 9 upper and lower, rectangular beam 6 outside is stretched out in one end of preset lace 11; Setting is encorbelmented bracket bending resistance steel bar framework 10, bracket bending resistance steel bar framework 10 of encorbelmenting comprise some be arranged in parallel along rectangular beam 6 length direction horizontal bending resistance reinforcing bar 15, multiplely to extend and the longitudinal bending resistance reinforcing bar 16 be welded and fixed with horizontal bending resistance reinforcing bar 15 along rectangular beam 6 length direction; Encorbelment one end of bracket bending resistance steel bar framework 10 and rectangular beam steel bar stress framework 9 is welded and fixed or builds in rectangular beam 6, and the other end is arranged in bracket 7 of encorbelmenting; Then build rectangular beam 6, after rectangular beam 6 solidifies, remove the template between 6 and 7.
D, build bracket 7 of encorbelmenting
One end surface thereof of stretching out rectangular beam 6 outside at preset lace 11 welds multiple template lacing wire 12, and the angle between template lacing wire 12 and the 3rd structure reinforcing bars 91 is acute angle; End unsettled for template lacing wire 12 passed template and is bolted, forming the soffit formwork for building bracket 7 of encorbelmenting, in temporary truss frame structure 1, then building other templates of building bracket 7 of encorbelmenting, then build bracket 7 of encorbelmenting.Template lacing wire 12, bracket bending resistance steel bar framework 10 part be arranged in outside rectangular beam 6 of encorbelmenting are built in bracket 7 of encorbelmenting.To encorbelment bracket bending resistance steel bar framework 10 top near bracket 7 of encorbelmenting.
E, build panel 8
Temporary truss frame structure 1, tee girder 5, rectangular beam 6 and bracket 7 of encorbelmenting build the template of building panel 8, then builds panel 8; Panel 8 is fixed on above tee girder 5, rectangular beam 6 and bracket 7 of encorbelmenting.
The present invention utilizes the first metal framework 92 arranged in advance in rectangular beam 6 to form the anti-twisting property of rectangular beam 6, and utilizes preset lace 11 and template lacing wire 12 to build bracket 7 of encorbelmenting; Utilize at rectangular beam 6 and build the bending resistance that the second metal framework 93 arranged in advance in bracket 7 of encorbelmenting forms bracket 7 of encorbelmenting and build panel 8.
The present invention utilizes temporary truss frame structure 1, adopt the method for block placement, arrange rectangular beam steel bar stress framework 9 when building and encorbelment that concrete is antitorque, bending resistance requirement to meet for bracket bending resistance steel bar framework 10, utilize preset lace 11 and template lacing wire 12 fixedly to encorbelment bracket template, realize the concrete construction of cantilevered structure.
This method can meet the requirement of engineering construction quality, safety and progress, and cost is low, effective.
Claims (9)
1. a construction method for large-scale strip-type bracket, is characterized in that, comprise the following steps:
A, set up temporary truss frame structure
Pier (3) and the upper prior pre-buried iron plate (2) of abutment pier (4) in built, make i iron purlin frame is welded on pre-buried iron plate (2), between Zhong Dun (3) and abutment pier (4), form temporary truss frame structure (1);
B, build tee girder
Temporary truss frame structure (1) builds template, builds tee girder (5);
C, build rectangular beam
The fixation of temporary truss frame structure (1) and T-shaped beam (5) is utilized to build template for building rectangular beam (6), and build rectangular beam steel bar stress framework (9) in a template, at the upper fixing some preset laces (11) of rectangular beam steel bar stress framework (9); Build bracket bending resistance steel bar framework (10) of encorbelmenting, bracket bending resistance steel bar framework (10) one end of encorbelmenting is arranged in rectangular beam to be built (6), and the other end stretches out rectangular beam to be built (6) outward; Then rectangular beam (6) is built;
D, build bracket of encorbelmenting
One end of some template lacing wires (12) is fixedly connected with preset lace (11), end unsettled for template lacing wire (12) is passed template and is bolted, formation is used for building the soffit formwork of bracket (7) of encorbelmenting, then in temporary truss frame structure (1), build other templates of building bracket of encorbelmenting (7), then build bracket of encorbelmenting (7);
E, build panel
Temporary truss frame structure (1), tee girder (5), rectangular beam (6) and bracket of encorbelmenting (7) build the template of building panel (8), then builds panel (8).
2. the construction method of a kind of large-scale strip-type bracket according to claim 1, it is characterized in that, rectangular beam steel bar stress framework (9) comprise multiple be arranged in parallel along rectangular beam (6) length direction L-type reinforcing bar (13), multiplely to extend and the longitudinal reinforcement (14) fixing with L-type reinforcement welding along rectangular beam (6) length direction; Rectangular beam steel bar stress framework (9) is built in rectangular beam (6).
3. the construction method of a kind of large-scale strip-type bracket according to claim 2, it is characterized in that, bracket bending resistance steel bar framework (10) of encorbelmenting comprise some be arranged in parallel along rectangular beam (6) length direction horizontal bending resistance reinforcing bar (15), multiplely to extend along rectangular beam (6) length direction and the longitudinal bending resistance reinforcing bar (16) be welded and fixed with horizontal bending resistance reinforcing bar (15); Encorbelment one end of bracket bending resistance steel bar framework (10) and rectangular beam steel bar stress framework (9) is welded and fixed or builds in rectangular beam (6), and the other end is arranged in bracket of encorbelmenting (7).
4. the construction method of a kind of large-scale strip-type bracket according to claim 3, it is characterized in that, the part that template lacing wire (12) and bracket bending resistance steel bar framework (10) of encorbelmenting are arranged in rectangular beam (6) outside is built in bracket of encorbelmenting (7); The top of close bracket (7) of encorbelmenting of bracket bending resistance steel bar framework (10) of encorbelmenting.
5. the construction method of a kind of large-scale strip-type bracket according to claim 1, is characterized in that, described temporary truss frame structure (1) is many Pin splayed i iron purlin.
6. the construction method of a kind of large-scale strip-type bracket according to claim 1, is characterized in that, tee girder (5) and two ends, rectangular beam (6) elongatedness direction are all fixed on middle pier (3) and abutment pier (4).
7. the construction method of one kind large-scale strip-type bracket, it is characterized in that, comprise the following steps: build the template for casting beams, and build in a template outside the steel mesh reinforcement for casting beams and build beam stress steel bar framework, beam stress steel bar framework is fixed some preset laces (11); Build bracket bending resistance steel bar framework (10) of encorbelmenting, bracket bending resistance steel bar framework (10) one end of encorbelmenting is arranged in treats casting beams, and the other end stretches out to be treated outside casting beams; Then casting beams; One end of some template lacing wires (12) is fixedly connected with preset lace (11), end unsettled for template lacing wire (12) is passed template and is bolted, formation is used for building the soffit formwork of bracket (7) of encorbelmenting, then build other templates of building bracket of encorbelmenting (7), then build bracket of encorbelmenting (7).
8. the construction method of a kind of large-scale strip-type bracket according to claim 7, it is characterized in that, beam stress steel bar framework comprise multiple be arranged in parallel along beam length direction L-type reinforcing bar (13), multiplely to extend along beam length direction and the longitudinal reinforcement (14) fixing with L-type reinforcement welding; Beam stress steel bar framework is built in rectangular beam (6); Bracket bending resistance steel bar framework (10) of encorbelmenting comprise some be arranged in parallel along beam length direction horizontal bending resistance reinforcing bar (15), multiplely to extend along beam length direction and the longitudinal bending resistance reinforcing bar (16) be welded and fixed with horizontal bending resistance reinforcing bar (15); Encorbelment one end of bracket bending resistance steel bar framework (10) and beam stress steel bar framework is welded and fixed or builds Yu Liangzhong, and the other end is arranged in bracket of encorbelmenting (7).
9. the construction method of a kind of large-scale strip-type bracket according to claim 7, is characterized in that, the top of bracket bending resistance steel bar framework (10) near bracket (7) of encorbelmenting of encorbelmenting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410654629.8A CN104389270B (en) | 2014-11-17 | 2014-11-17 | A kind of construction method of large-scale strip-type bracket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410654629.8A CN104389270B (en) | 2014-11-17 | 2014-11-17 | A kind of construction method of large-scale strip-type bracket |
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| Publication Number | Publication Date |
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| CN104389270A true CN104389270A (en) | 2015-03-04 |
| CN104389270B CN104389270B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410654629.8A Active CN104389270B (en) | 2014-11-17 | 2014-11-17 | A kind of construction method of large-scale strip-type bracket |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929314A (en) * | 2015-04-30 | 2015-09-23 | 中冶建工集团有限公司 | Cow-leg post concrete construction method |
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| CN103866697A (en) * | 2014-04-10 | 2014-06-18 | 中铁二局股份有限公司 | Pier and horizontal tie beam bracket support synchronization construction method |
| CN103938640A (en) * | 2014-04-14 | 2014-07-23 | 中交第二航务工程局有限公司 | Technology and device for erecting steel platform for land bridge foundation construction |
| CN104060542A (en) * | 2014-06-30 | 2014-09-24 | 中交二航局第四工程有限公司 | Transverse bridge direction prestress exerting device for combined beam cable-stayed bridge and transverse bridge direction prestress exerting method |
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2014
- 2014-11-17 CN CN201410654629.8A patent/CN104389270B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US7213377B1 (en) * | 2004-06-30 | 2007-05-08 | Sackett Gerald L | Device and method for spacing and bracing framing components |
| JP3754981B1 (en) * | 2005-03-08 | 2006-03-15 | 極東鋼弦コンクリート振興株式会社 | PC cable tension / fixation connection method |
| CN103758040A (en) * | 2013-12-31 | 2014-04-30 | 中铁二十一局集团路桥工程有限公司 | Special hanging frame for construction of post-casting flange plate of sound barrier T beam and using method thereof |
| CN103866697A (en) * | 2014-04-10 | 2014-06-18 | 中铁二局股份有限公司 | Pier and horizontal tie beam bracket support synchronization construction method |
| CN103938640A (en) * | 2014-04-14 | 2014-07-23 | 中交第二航务工程局有限公司 | Technology and device for erecting steel platform for land bridge foundation construction |
| CN104060542A (en) * | 2014-06-30 | 2014-09-24 | 中交二航局第四工程有限公司 | Transverse bridge direction prestress exerting device for combined beam cable-stayed bridge and transverse bridge direction prestress exerting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104929314A (en) * | 2015-04-30 | 2015-09-23 | 中冶建工集团有限公司 | Cow-leg post concrete construction method |
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| CN104389270B (en) | 2016-04-27 |
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Inventor after: Dong Guoqing Inventor after: Ye Jiandong Inventor after: Wu Zhenzhen Inventor after: Li Fang Inventor after: Li Linhui Inventor after: Lu Jing Inventor after: Xu Jianbo Inventor after: Chen Qiong Inventor after: Liu Tongxiang Inventor after: Liao Guangrong Inventor after: Chen Song Inventor after: Song Chao Inventor after: Lu Fei Inventor after: Yang Chao Inventor after: Liu Hongyu Inventor after: Xie Yancun Inventor before: Dong Guoqing Inventor before: Ye Jiandong Inventor before: Wu Zhenzhen Inventor before: Li Linhui Inventor before: Lu Jing Inventor before: Xu Jianbo Inventor before: Chen Qiong Inventor before: Liu Qing Inventor before: Song Chao Inventor before: Lu Fei Inventor before: Liu Tongxiang Inventor before: Chen Song Inventor before: Yang Chao Inventor before: Xuan Yunshu Inventor before: Liu Hongyu Inventor before: Xie Yancun |
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