CN103437287B - Be applied to the whole opening box girder section assembling method of bridge construction - Google Patents
Be applied to the whole opening box girder section assembling method of bridge construction Download PDFInfo
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- CN103437287B CN103437287B CN201310297423.XA CN201310297423A CN103437287B CN 103437287 B CN103437287 B CN 103437287B CN 201310297423 A CN201310297423 A CN 201310297423A CN 103437287 B CN103437287 B CN 103437287B
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Abstract
The invention discloses a kind of whole opening box girder section assembling method being applied to bridge construction, comprise the following steps: whole opening box girder sections to be assembled is transported to bridge fabrication machine afterbody with fortune beam dolly by (1); (2) on bridge fabrication machine, brooder is installed, whole bridge fabrication machine is all wrapped up by brooder; (3) with bridge fabrication machine, whole opening box girder sections is hung to precalculated position, and it carries out locus adjustment with jack pair, make its according to the rules line style put; (4) the end banding of whole opening box girder sections wet seam reinforcing bar, wet joint template is installed and builds wet joint concrete; (5) covering curing is carried out to wet joint concrete, until its intensity and modulus of elasticity reach designing requirement; (6) carry out prestressed stretch-draw, come to nothing bridge fabrication machine the via hole that moves forward afterwards, carries out the splicing of next whole opening box girder sections; (7) build maintenance canopy and late maintaining is carried out to wet seam.The present invention achieves cold snap construction when ensureing construction quality, have very high practical value and promotional value.
Description
Technical field
The present invention relates to a kind of bridge construction technique, specifically, relate to a kind of whole opening box girder section assembling method being applied to bridge construction.
Background technology
Bridge construction has that the cycle is long, construction environment is poor, technical difficulty high, especially in this just very poor area of geographical environment.As: Shanxi Province's Shuozhou City is domestic, belong to continent monsoon climate, winter is very long, spring and autumn is connected, rain heat same period, solar radiation is strong, light application time is long, the temperature difference is comparatively large, frost-free period is short, drying is windy is the principal character of this regional climate.This area average temperature of the whole year 3.9-7.2 DEG C, Extreme Maximum Temperature 37.9 DEG C, Annual lowest climate temperature-40.4 DEG C, by genus cold district, railway engineering Study on Climate Division.
The bridge construction environment being similar to this cold district of Shuozhou, shanxi Province is a lot, and the people's livelihood of bridge construction relation, very urgent, even if external environment is severe, also must constructs as early as possible, to completing work items early, coming into operation.And under this cold environment, carry out bridge construction, not only require very high to the fitness of constructor, constructor is needed to work in cold environments for a long time, and it is also very high to the every construction process requirement in bridge construction process, conventional construction technology is difficult to make its result reach project acceptance inspection standard, easily occurs potential safety hazard.As: the sub-project constructions such as bridge king-pile, cushion cap, pier stud, beam, all there is temperature requirement to construction environment, if temperature cannot meet, the stake of building out, cushion cap, pier stud, beam etc. are very difficult to conform to quality requirements, cannot use, even if use reluctantly, also there is great potential safety hazard, finally cannot pass through the project acceptance inspection.
Summary of the invention
The object of the present invention is to provide a kind of whole opening box girder section assembling method being applied to bridge construction, mainly solve the problem being difficult to assembling construction after whole opening box girder precast segment completes at cold snap.
To achieve these goals, the technical solution used in the present invention is as follows:
Be applied to the whole opening box girder section assembling method of bridge construction, it is characterized in that, comprise the following steps:
(1) with fortune beam dolly, whole opening box girder sections to be assembled is transported to bridge fabrication machine afterbody;
(2) on bridge fabrication machine, brooder is installed, whole bridge fabrication machine is all wrapped up by brooder;
(3) with bridge fabrication machine, whole opening box girder sections is hung to precalculated position, and it carries out locus adjustment with jack pair, make its according to the rules line style put;
(4) the end banding of whole opening box girder sections wet seam reinforcing bar, wet joint template is installed and builds wet joint concrete;
(5) covering curing is carried out to wet joint concrete, until its intensity and modulus of elasticity reach designing requirement;
(6) carry out prestressed stretch-draw, come to nothing bridge fabrication machine the via hole that moves forward afterwards, carries out the splicing of next whole opening box girder sections;
(7) build maintenance canopy and late maintaining is carried out to wet seam.
In order to play good protection to work progress, avoid the adverse effect of cold snap, described (3), (4), (5), (6) all complete in brooder.
Further, described brooder is formed by steel structure framework outer wrap tarpaulin, and its end face is connected with main truss outside bridge fabrication machine by shaped steel, and its side is then connected with main truss outside bridge fabrication machine and hanger respectively.
In order to solve the viewing angle problem of constructor, end face and each side of described brooder are respectively arranged with plane skylight.Specifically, described plane skylight is poly-vinegar carbon fat sunlight board.
In order to solve low temperature effect better, described brooder is built-in with the stove for heating.Or, in described brooder, be provided with steam pipeline.Built in wet seam, bridge fabrication machine reach via hole after, stove or steam can be adopted as required to carry out late maintaining to wet seam, thus thoroughly solve Low Temperature Problems.
For the ease of construction, provide the flexibility of construction, described brooder is fixed on bridge fabrication machine, moves with bridge fabrication machine; And described maintenance canopy is also portable structure, is arranged on and needs on the whole opening box girder stage of maintenance, the wet seam on the whole opening box girder sections after assembled to bridge fabrication machine carries out maintenance.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention adopts the section assembling of self-built brooder to whole opening box girder to provide suitable construction environment, build again maintenance canopy afterwards and late maintaining is carried out to assembled good sections, efficiently avoid the impact of extraneous cold snap on construction, make the section assembling construction of whole opening box girder no longer by the restriction of environment temperature, also can ensure that construction quality is up to standard even if construct in cold weather.
(2) mode that the present invention adopts stove and vapor phase to coordinate is brooder heating, and warm temperature of shed can manual control, regulates at any time, thus makes construction temperature remain at the optimum temperature of project demand, and then for ensureing that construction quality lays a solid foundation.
(3) work progress of the present invention all completes in brooder, and constructor does not affect by extraneous cold snap, can realize working continuously, thus for farthest shortening the basis that construction period provides realization.
(4) the present invention offers plane skylight on brooder, thus provides sufficient daylighting for constructor, ensures the visual angle of constructor, for smooth construction provides powerful guarantee.
(5) in the present invention, maintenance canopy and brooder are movable type, mobile with the movement of bridge fabrication machine, and the section assembling construction not being only whole opening box girder provides guarantee, and operation is very convenient, time saving and energy saving, can easily realize reusing.
(6) principle of the invention is simple, and it is convenient to implement, and cost is not high, efficiently solves the adverse effect of low temperature environment to bridge construction, for bridge construction opens a new way, has very large innovative significance and very high practicality and promotional value.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and embodiments of the present invention include but not limited to the following example.
Embodiment
The whole opening box girder section assembling method that this technology provides, be based on the segmented method for prefabricating of the whole opening box girder of autonomous Design, belong to its subsequent technology, this technology is applied for a patent, and particular content is announced in that patent, is only briefly described at this.
The segmented method for prefabricating of whole opening box girder, main process is as follows: (1) at the spacious ambient As precasting yard of physical features, and builds brooder; (2) in brooder, set up the pedestal for prefabricated whole opening box girder sections; (3) carry out segmentation according to the position of whole opening box girder erection, and on pedestal, use steel to build the prefab form corresponding to whole opening box girder sections; (4) each sections of short line casting prefabricated whole opening box girder of difference on the prefab form built is adopted.The method mainly solves cold snap and carries out the prefabricated problem of whole opening box girder, and concrete sections casting craft does not improve.
Based on above-mentioned precast segment, after precast segment is got well and reached requirement in the length of time, the assembling construction of sections can be carried out.
Before assembling construction, first on bridge fabrication machine, brooder is installed, whole bridge fabrication machine parcel is closed, then utilize fortune beam dolly to be transported to bridge fabrication machine afterbody.Overhead traveling crane on bridge fabrication machine or purlin are hung and the sections on fortune beam dolly are hung onto putting position, then the adjustment of sections locus is carried out with jack, the sections of whole opening box girder linearly to be set by regulation, then colligation wet seam reinforcing bar, wet joint template is installed and builds wet joint concrete.After this, be covered in wet joint concrete surface with tarpaulin and carry out maintenance, until wet joint concrete intensity and modulus of elasticity all reach designing requirement, carry out the prestressed stretch-draw of whole opening box girder sections again, after completing the prestressed stretch-draw of all regulations, come to nothing bridge fabrication machine the via hole that moves forward, and starts the consolidation service of next hole sections after putting in place.
Described brooder entirety belongs to portable structure, and it forms primarily of the coated tarpaulin of steel structure framework, and end face adopts shaped steel to be connected with main truss outside bridge fabrication machine, and side is connected with main truss outside bridge fabrication machine and hanger.The each side of brooder and end face all adopt poly-vinegar carbon fat sunlight board, to facilitate daylighting of constructing daytime; Cannot use the position of sunlight board, adopt that tarpaulin is soft goes along with sb. to guard him, brooder underrun hanger also utilizes tarpaulin to carry out soft going along with sb. to guard him.
The each side of brooder and end face skeleton are 16# channel-section steel, and frame made by angle steel, band iron makees press strip in the skeleton employing of poly-vinegar carbon fat sunlight board, is welded on main framing, work plane end face, front and two sides formed and encloses structure.
For reducing brooder to the impact of construction survey, opening the door in the appropriate location of poly-vinegar carbon fat sunlight board, windowing or perforate, being convenient for measuring perspective, airtight in time when not using, to reduce thermal loss.
The inner heating of brooder adopts stove heating, pipeline leads to the various ways such as steam heat radiation heating.
According to outside air temperature situation of change and brooder inside and outside temperature difference situation, before pouring concrete, first lead to steam by pipeline and prefabricated subsection template and warm temperature of shed are risen to positive temperature by stove, and in concreting process continuous heating, prevent concrete from enduring cold when building.Concrete starts to occur the heat of hydration after building 8-10 hour, and continues about two days, and concrete internal temperature is higher during this period, adds the heat-insulation and heat-preservation of surrounding, and concrete can not be freezing.
Arrange 1 2t boiler at precasting yard, and lay pipeline to each prefabricated subsection and wet seaming position from boiler, in pipeline, logical steam carries out stream curing to concrete.At brooder internal placement major diameter honeycomb briquette stove, and by chimney emission, be strictly on guard against gas poisoning in brooder.
Because wet seam length is 0.6m, and whole hole beam totally 14 wet seams, the case interior space is less, and required stove amount is also little.Two ends and middle each layout 1 stove in case.Reinforcing bar, model sheetinstallat and concreting time, burn in beam coal heating.During concrete curing, the indoor extension thermometer of case carries out temperature control, Real-Time Switch steam and stove, is controlled in the temperature required by warm temperature of shed.
During bridge fabrication machine reach via hole, brooder to be attached on bridge fabrication machine and along with bridge fabrication machine reach.After bridge fabrication machine completes reach via hole, maintenance canopy is at once adopted to carry out continuation maintenance, to ensure concrete quality to the wet seam of having built.
Maintenance canopy is installed on the outside of sections, its agent structure is identical with brooder, supported by steel structure framework, its outer wrap tarpaulin, maintenance shed top surface and side arrange plane skylight, and the frame welding of plane skylight is on the main framing of maintenance canopy, make end face, two sides formed enclose structure, cannot with the position of plane skylight, adopt that paulin is soft goes along with sb. to guard him, bottom adopts soft paulin that plane skylight tiles to go along with sb. to guard him.The skeleton of plane skylight adopts angle steel to do frame, and band steel makees press strip.
Adjacent maintenance canopy by shaped steel bolted on connection, and is moved integrally by the rail on bridge floor outrigger base.Bridge floor passes through for convenience of personnel and small-sized haulage device, and arranging door-shaped frame, is U-shaped skeleton under bridge floor.
Between maintenance canopy and sections, space is less, and required stove amount is also little, respectively arranges 2 stoves in each wet seam top, side, bottom surface.The spliced girder case interior space of sections is also less, and required stove amount is also little.Each layout 1 stove in each wet seam.
In the wet seam treating sections concrete intensity up to standard after, can maintenance be stopped, shifting out maintenance canopy, and maintenance is carried out to next sections.
Above-described embodiment is only a kind of embodiment of the present invention; not protection scope of the present invention is limited; in every case design principle of the present invention is adopted, and any non-creativeness conversion carried out on the basis of protection scheme of the present invention, all belong to protection scope of the present invention.
Claims (7)
1. be applied to the whole opening box girder section assembling method of bridge construction, it is characterized in that, comprise the following steps:
(1) with fortune beam dolly, whole opening box girder sections to be assembled is transported to bridge fabrication machine afterbody;
(2) on bridge fabrication machine, brooder is installed, whole bridge fabrication machine is all wrapped up by brooder;
(3) with bridge fabrication machine, whole opening box girder sections is hung to precalculated position, and it carries out locus adjustment with jack pair, make its according to the rules line style put;
(4) the end banding of whole opening box girder sections wet seam reinforcing bar, wet joint template is installed and builds wet joint concrete;
(5) covering curing is carried out to wet joint concrete, until its intensity and modulus of elasticity reach designing requirement;
(6) carry out prestressed stretch-draw, come to nothing bridge fabrication machine the via hole that moves forward afterwards, carries out the splicing of next whole opening box girder sections;
(7) build maintenance canopy and late maintaining is carried out to wet seam;
Described step (3), (4), (5), (6) all complete in brooder, described brooder is formed by steel structure framework outer wrap tarpaulin, and its end face is connected with main truss outside bridge fabrication machine by shaped steel, its side is then connected with main truss outside bridge fabrication machine and hanger respectively.
2. the whole opening box girder section assembling method being applied to bridge construction according to claim 1, is characterized in that, end face and each side of described brooder are respectively arranged with plane skylight.
3. the whole opening box girder section assembling method being applied to bridge construction according to claim 2, is characterized in that, described plane skylight is poly-vinegar carbon fat sunlight board.
4. the whole opening box girder section assembling method being applied to bridge construction according to claim 3, it is characterized in that, described brooder is built-in with the stove for heating.
5. the whole opening box girder section assembling method being applied to bridge construction according to claim 3 or 4, is characterized in that, be equipped with steam pipeline in described brooder.
6. the whole opening box girder section assembling method being applied to bridge construction according to claim 5, it is characterized in that, described brooder is fixed on bridge fabrication machine, moves with bridge fabrication machine.
7. the whole opening box girder section assembling method being applied to bridge construction according to claim 6, it is characterized in that, described maintenance canopy is portable structure.
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| CN201310297423.XA CN103437287B (en) | 2013-07-16 | 2013-07-16 | Be applied to the whole opening box girder section assembling method of bridge construction |
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| CN201310297423.XA CN103437287B (en) | 2013-07-16 | 2013-07-16 | Be applied to the whole opening box girder section assembling method of bridge construction |
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| CN103437287B true CN103437287B (en) | 2015-12-02 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104074130A (en) * | 2014-07-16 | 2014-10-01 | 山东莱钢建设有限公司 | Abutting-connecting opening connecting structure of box-type bridge single body and box-type bridge |
| CN106012868B (en) * | 2016-05-19 | 2017-08-08 | 中铁十一局集团有限公司 | Symmetrical free cantilever erection bridge is accurately positioned construction control method |
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Address after: The eastern section of the town of Xueyuan Road Xindu Xindu District of Chengdu city of Sichuan Province, No. 289 610000 Applicant after: CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP OF THE FIFTH ENGINEERING Co.,Ltd. Applicant after: CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP Co.,Ltd. Address before: The eastern section of the town of Xueyuan Road Xindu Xindu District of Chengdu city of Sichuan Province, No. 289 610000 Applicant before: CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP OF THE FIFTH ENGINEERING Co.,Ltd. Applicant before: China thirteen Railway Construction Bureau Group Co.,Ltd. Address after: The eastern section of the town of Xueyuan Road Xindu Xindu District of Chengdu city of Sichuan Province, No. 289 610000 Applicant after: CHINA RAILWAY CONSTRUCTION BRIDGE ENGINEERING BUREAU GROUP OF THE FIFTH ENGINEERING Co.,Ltd. Applicant after: China thirteen Railway Construction Bureau Group Co.,Ltd. Address before: The eastern section of the town of Xueyuan Road Xindu Xindu District of Chengdu city of Sichuan Province, No. 289 610000 Applicant before: Fifth Engineering Co.,Ltd. of China Railway 13th Bureau Group Applicant before: CHINA RAILWAY 13TH BUREAU GROUP Co.,Ltd. |
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