CN201738226U - Railway box girder assembled and cemented by precast segments - Google Patents
Railway box girder assembled and cemented by precast segments Download PDFInfo
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- CN201738226U CN201738226U CN2010202594270U CN201020259427U CN201738226U CN 201738226 U CN201738226 U CN 201738226U CN 2010202594270 U CN2010202594270 U CN 2010202594270U CN 201020259427 U CN201020259427 U CN 201020259427U CN 201738226 U CN201738226 U CN 201738226U
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Abstract
The utility model relates to a railway box girder assembled and cemented by precast segments. At present, the conventional railway prestressed concrete box girder segments are mainly precast and assembled by adopting the wet joint technology, that is, the box girder precast segments are industrially produced and then transported to a bridge location segment by segment, a certain gap is reserved between every two precast segments, cast-in-place concrete joint is carried out once again on a movable bracket bridge-building machine or a movable hanging basket by utilizing the bars extending out of the precast segments to achieve assembly, the problems of long-term concrete curing and requirement of more construction equipment are caused. In the utility model, the occlusion configuration of the joint surfaces of the spliced box girder precast segments is adopted, the segments are spliced together through special epoxy sealant for bridges, and built-in prestress pipelines are arranged to improve the shearing and pressure resistance of the box girder. By virtue of the box girder provided by the utility model, the construction period of bridges is effectively shortened, the number of construction mechanical equipment is reduced, the construction procedure is simplified, and environmental protection and investment conservation are facilitated.
Description
Technical field
The utility model relates to a kind of railway prefabricated section assembling and glueds joint the case beam.
Background technology
At present, the job practices of conventional Railway Prestressed Concrete box girder segment precast assembly is that the some sections unit that vertically the beam body is divided into along bridge carries out batch production production mostly, be transported to bridge location more piecemeal, each prefabricated subsection is reserved a fixed gap, carry out assembly unit at traversing carriage bridge fabrication machine or the mobile reinforcing bar cast-in-situ concrete seam once more of utilizing prefabricated subsection to stretch out on the basket of hanging, by the prestressing force pulling force each prefabricated subsection is connected into as a wholely then, be called wet seam precast segment assembly unit case beam.
Wet seam precast segment assembly unit case beam technology has been passed through systematic research in the China railways bridge, also obtained using widely, and accumulated a large amount of design and construction experiences.But this technology also needs cast-in-place wet joint concrete on support, and the concrete curing required time is longer, and the job site need be more with equipment, though can guarantee construction quality, long construction period, utilization rate of equipment and installations is low, and economy is not high, is unfavorable for environmental protection yet.
Summary of the invention
The purpose of this utility model provides a kind of short construction period, the higher railway prefabricated section assembling of economy glueds joint the case beam.
The technical scheme that the utility model adopted is:
A kind of railway prefabricated section assembling glueds joint the case beam, form by the beam prefabricated sections of more piece case, the beam prefabricated sections of every joint case includes top board, web, base plate, it is characterized in that: the two sides splicing joint face of top board, web and the base plate of the beam prefabricated sections of described case is provided with the shear connector keyway, and adopts the full joint face setting of close key form; The web of the beam prefabricated sections of described case and base plate are provided with the prestress pipe perpendicular to joint face, adopt the mode of prestressing with bond to be provided with; Bonding mode is adopted in the splicing of the beam prefabricated sections of described case, and prestress pipe joint face place is provided with seal washer.
Described a kind of railway prefabricated section assembling glueds joint the case beam, it is characterized in that: the beam prefabricated sections of described case the shear connector keyway adopt trapezoidal flute profile; Shear connector keyway lateral arrangement on the web, is arranged along the web width overall with except that web outside is reserved the topping of 5 ~ 7cm at the joint face place of web.
Described a kind of railway prefabricated section assembling glueds joint the case beam, it is characterized in that: the splicing joint face place of the beam prefabricated sections of adjacent two joint casees, the slotting position of its shear connector keyway staggers mutually, makes the splicing joint face of the beam prefabricated sections of adjacent two joint casees form one protruding one recessed interlock configuration.
Described a kind of railway prefabricated section assembling glueds joint the case beam, it is characterized in that: the beam prefabricated sections of described case splices with the special-purpose epoxy sealing glue of bridge.
Described a kind of railway prefabricated section assembling glueds joint the case beam, it is characterized in that: the special-purpose epoxy sealing glue of described bridge is the bi-component solvent epoxy varnish.
Described a kind of railway prefabricated section assembling glueds joint the case beam, it is characterized in that: the seal washer that paste at described prestress pipe joint face place adopts closed pore polyethylene foamed material.
The utlity model has following advantage:
Splicing case beam technology of the present utility model when having guaranteed case beam shearing resistance anti-pressure ability, has shortened the bridge construction cycle effectively, has reduced construction equipment, has simplified working procedure, more helps environmental protection, saves investment.
Description of drawings
Fig. 1 is the beam prefabricated sections joint face of a case configuration picture.
Fig. 2 is the I-I sectional view.
Fig. 3 is joint face prestress pipe seal approach figure.
Among the figure, 1-top board, 2-web, 3-base plate, 4-shear connector keyway, 5-prestress pipe, 6-prestress pipe seal washer, the special-purpose epoxy sealing glue of 7-bridge.
The specific embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
A kind of railway prefabricated section assembling that the utility model relates to glueds joint the case beam, is made up of the beam prefabricated sections of more piece case, and the beam prefabricated sections of every joint case includes top board 1, web 2 and base plate 3.
The two sides splicing joint face of the beam prefabricated sections of case is provided with shear connector keyway 4, and adopts the full joint face setting of close key form, and fluting adopts trapezoidal flute profile; Shear connector keyway 4 lateral arrangement on the web 2, are arranged along the web width overall with except that the topping of 5～7cm is reserved in web 2 outsides at the joint face place of web 2; The splicing joint face place of the beam prefabricated sections of adjacent two joint casees, the slotting position of its shear connector keyway 4 staggers mutually, makes the splicing joint face of the beam prefabricated sections of adjacent two joint casees form one protruding one recessed interlock configuration, bears case beam shearing.
The position of no shear connector keyway 4 on the web 2 of the beam prefabricated sections of case and the base plate 3 is provided with the prestress pipe 5 perpendicular to joint face, also is the steel beam tube road of case beam, and it is provided with the mode that adopts prestressing with bond; Prestressing force is the key components of precast segment assembly unit case beam, and it is linked to be an integral body with each separate type prefabricated subsection, has realized case beam total cross-section pressurized, does not ftracture under normal operating condition.
Bonding mode is adopted in the splicing of the beam prefabricated sections of case, promptly smears the whole front cover that connects with the special-purpose epoxy sealing glue 7 of bridge and carries out the contraposition splicing, and connecing on the front cover of prestress pipe 5 places also will be pasted seal washer 6.The special-purpose epoxy sealing glue 7 of bridge adopts the bi-component solvent epoxy varnish; have good physics and chemical property; combine with seal washer 6 and to play a role; can be stressed jointly with the case beam; compatible deformation, good seal performance can waterproof be prevented corroding; guard box is girder pre-stressed not to be etched, and is the main safeguard of glueing joint case beam durability.
Concrete implementation step of the present utility model is as follows.
1, box girder segment is prefabricated:
Finish prefabricated, health, the demoulding of the beam prefabricated sections of case, reach design strength.
2, the assembly unit of traversing carriage bridge fabrication machine puts in place and moves beam and piece together in advance:
At bridge location the traversing carriage bridge fabrication machine is carried out assembly unit, each prefabricated sections is moved beam in order, on the good traversing carriage bridge fabrication machine of assembly unit, carry out the pre-assembly unit of sections.
3, sections joint treatment:
All joint faces must be clean, removes impurity such as degreasing, and concrete surface should be smooth as far as possible, and the loose surface layer and the cement that adheres to should be removed totally, and gluing front surface is wanted dry or oven dry.
4, corresponding joint face duct structure construction:
Processing is constructed in each joint face duct, comprise and paste sealing rubber ring etc.
5, glue mixing and gluing:
The bi-component solvent epoxy varnish was stirred 2～3 minutes under about 400 rev/mins of states, till color evenly, avoid introducing air in the whipping process as far as possible, use flat instrument glue mixing as far as possible, be convenient to heat radiation, extend working time.Use scraper evenly brushing from bottom to top, be the quickening progress, can be divided into several work planes and carry out gluing simultaneously, gluing thickness is 2～3 minutes.The concrete recess will be filled and led up, and takes measures within 2 hours after brushing process and the assembly unit, prevents rainwater intrusion and solar radiation.Under normal temperature condition, mix the bi-component solvent epoxy varnish of having made and should in 45 minutes, brush and finish, splice in 90 minutes.The surface temperature of concrete of gluing should not be lower than 5 ℃, otherwise must take the measure of heating.The gluing personnel should have safeguard procedures in work progress, and carry out security protection work.
6, prefabricated subsection contraposition splicing, interim prestressing force of stretch-draw and permanent prestressing force:
Finish in full joint face epoxy resin brushing, behind the prestressed seal for pipe joints material, move sections to be pieced together, contraposition is spliced.The interim prestressing force of stretch-draw solidifies epoxy resin during splicing under the pressure that is not less than 0.30 MPa, and the epoxy resin seam will keep the interim prestressing force of minimum in seam before the epoxy resin ot-yet-hardened, and interim prestressing force must not be removed.Glue-line width after the extruding should the starved phenomenon should not occur at 1.0～2.0 mm.The epoxide-resin glue knotting strength is not less than beam body concrete intensity, and the primary solidification time is greater than 2 hours, and be 24 hours hardening time fully, guarantees that operations such as gluing, pressurization finish before curing.The epoxy sealing glue cementing strength is higher than to design a model the beam concrete strength and solidify the back fully and passes the permanent prestressed strand steel of Shu Zhangla bundle, forms whole case beam.
7, prestress hole path pressure grouting:
After prestressing tendon stretch-draw was finished, mud jacking should be carried out in the duct in 24 hours.Prestressed pore passage two of prestressed stretch-draw is not carried out in shutoff before the mud jacking; The high-performance that the mud jacking material adopts the Ministry of Railways to identify does not have the anticorrosion grouting agent of contraction, and the cement paste that is pressed into the duct wants full closely knit.The technical requirements of vacuum grouting technology has:
(1) prestressed pore passage and two ends, duct must seal, and can determine seal degree by air seal test;
When (2) vacuumizing in the duct vacuum (negative value) be controlled at-0.06～-0.1MPa between;
(3) pressure of hole path pressure grouting is answered≤0.7 MPa, after slurry is filled with the duct, should hold under 0.50～0.60 MPa pressure and press 2 minutes;
(4) water/binder ratio of hole path pressure grouting≤0.35;
(5) the slurry degree of mobilization of cement paste is 30～50 seconds;
(6) cement paste stirring end to the time interval of pressing people's pipeline should be above 40 minutes;
(7) bleeding of slurry should all be absorbed by slurry less than bleeding within 2%, 24 hour after 3 hours;
(8) slurry initial setting time 〉=3 hour;
(9) slurry volume change＜5%;
(10) when temperature or member temperature are lower than 5 ℃, must not carry out mud jacking; The cement slurry temperature should be less than 35 ℃.When daytime temperature is higher than 35 ℃, should carry out at night.
Claims (6)
1. a railway prefabricated section assembling glueds joint the case beam, form by the beam prefabricated sections of more piece case, the beam prefabricated sections of every joint case includes top board (1), web (2), base plate (3), it is characterized in that: the two sides splicing joint face of the top board (1) of the beam prefabricated sections of described case, web (2) and base plate (3) is provided with shear connector keyway (4), and adopts the full joint face setting of close key form; The web (2) of the beam prefabricated sections of described case and base plate (3) are provided with the prestress pipe (5) perpendicular to joint face, adopt the mode of prestressing with bond to be provided with; Bonding mode is adopted in the splicing of the beam prefabricated sections of described case, and seal washer (6) is pasted at prestress pipe joint face place.
2. a kind of railway prefabricated section assembling according to claim 1 glueds joint the case beam, it is characterized in that: the beam prefabricated sections of described case shear connector keyway (4) adopt trapezoidal flute profile; Shear connector keyway (4) lateral arrangement on the web (2), is arranged along the web width overall with except that reserving the topping of 5 ~ 7cm in web (2) outside at the joint face place of web (2).
3. a kind of railway prefabricated section assembling according to claim 1 glueds joint the case beam, it is characterized in that: the splicing joint face place of the beam prefabricated sections of adjacent two joint casees, the slotting position of its shear connector keyway (4) staggers mutually, makes the splicing joint face of the beam prefabricated sections of adjacent two joint casees form one protruding one recessed interlock configuration.
4. a kind of railway prefabricated section assembling according to claim 1 glueds joint the case beam, and it is characterized in that: the beam prefabricated sections of described case splices with the special-purpose epoxy sealing glue of bridge (7).
5. glued joint the case beam according to claim 1 or 4 described a kind of railway prefabricated section assemblings, it is characterized in that: the special-purpose epoxy sealing glue of described bridge is the bi-component solvent epoxy varnish.
6. a kind of railway prefabricated section assembling according to claim 1 glueds joint the case beam, it is characterized in that: the seal washer (6) that paste at described prestress pipe joint face place adopts closed pore polyethylene foamed material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202594270U CN201738226U (en) | 2010-07-15 | 2010-07-15 | Railway box girder assembled and cemented by precast segments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202594270U CN201738226U (en) | 2010-07-15 | 2010-07-15 | Railway box girder assembled and cemented by precast segments |
Publications (1)
| Publication Number | Publication Date |
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| CN201738226U true CN201738226U (en) | 2011-02-09 |
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| CN2010202594270U Expired - Fee Related CN201738226U (en) | 2010-07-15 | 2010-07-15 | Railway box girder assembled and cemented by precast segments |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046464A (en) * | 2012-12-31 | 2013-04-17 | 中铁第四勘察设计院集团有限公司 | Continuous bridge structure with bridge floor different in width |
| CN104047225A (en) * | 2014-07-01 | 2014-09-17 | 中铁第一勘察设计院集团有限公司 | Segment prefabrication and assembly beam structure with steel sleeve elastic shear force tenons |
| CN106032663A (en) * | 2015-03-17 | 2016-10-19 | 中交公路规划设计院有限公司 | Connecting method for steel-concrete composite beam segment |
| CN106894517A (en) * | 2017-02-16 | 2017-06-27 | 上海市城市建设设计研究总院（集团）有限公司 | Compound shearing alignment pin |
| CN108385505A (en) * | 2018-05-11 | 2018-08-10 | 湖南省交通规划勘察设计院有限公司 | A kind of seam system and its construction method, box girder bridge for UHPC precast segment box beams |
| CN108411759A (en) * | 2018-04-28 | 2018-08-17 | 上海市城市建设设计研究总院（集团）有限公司 | The big box-beam structure of precast concrete of direction across bridge stem grafting method connection |
| CN108660902A (en) * | 2018-06-19 | 2018-10-16 | 中国铁路总公司 | A kind of Railway Prestressed Concrete continuous bridge of precast segment pin-connected panel |
| CN108660908A (en) * | 2018-06-19 | 2018-10-16 | 中国铁路总公司 | A kind of prestressed concrete cable-stayed bridge of the beam prefabricated pin-connected panel of tower |
| CN109235288A (en) * | 2018-11-15 | 2019-01-18 | 天津城建大学 | The sealing structure and method of presstressed reinforcing steel duct in beam sections Mosaic face |
| CN109826097A (en) * | 2019-02-18 | 2019-05-31 | 腾达建设集团股份有限公司 | A kind of interim prestressing force implementation method in the section of bridge subsection |
| CN110042792A (en) * | 2019-05-29 | 2019-07-23 | 周升华 | A kind of equipment that road surface mechanism and vehicular cleaning road surface are cleaned in automation |
| CN110485250A (en) * | 2019-05-27 | 2019-11-22 | 天津城建大学 | The precast segment beam and its splicing construction and construction method of a kind of free cantilever erection bridge |
| CN112458925A (en) * | 2020-12-02 | 2021-03-09 | 中交路桥建设有限公司 | Segment precast beam structure and construction method for splicing and combining bridge thereof |
| CN112609577A (en) * | 2020-11-23 | 2021-04-06 | 中国水利水电第四工程局有限公司 | Continuous beam segment prefabrication and assembly method |
| CN113216259A (en) * | 2021-06-08 | 2021-08-06 | 吉林建筑大学 | Method for applying prestress to concrete pipe gallery |
| CN113512934A (en) * | 2021-07-08 | 2021-10-19 | 中铁第五勘察设计院集团有限公司 | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section |
| CN113512935A (en) * | 2021-07-08 | 2021-10-19 | 中铁第五勘察设计院集团有限公司 | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section |
| CN114541252A (en) * | 2022-04-07 | 2022-05-27 | 安徽省交通规划设计研究总院股份有限公司 | Segment prestress assembled pier with core column and construction method |
| CN114855589A (en) * | 2022-05-07 | 2022-08-05 | 北京工业大学 | Prefabricated section bridge joint structure and construction method |
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2010
- 2010-07-15 CN CN2010202594270U patent/CN201738226U/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103046464A (en) * | 2012-12-31 | 2013-04-17 | 中铁第四勘察设计院集团有限公司 | Continuous bridge structure with bridge floor different in width |
| CN104047225A (en) * | 2014-07-01 | 2014-09-17 | 中铁第一勘察设计院集团有限公司 | Segment prefabrication and assembly beam structure with steel sleeve elastic shear force tenons |
| CN106032663A (en) * | 2015-03-17 | 2016-10-19 | 中交公路规划设计院有限公司 | Connecting method for steel-concrete composite beam segment |
| CN106894517A (en) * | 2017-02-16 | 2017-06-27 | 上海市城市建设设计研究总院（集团）有限公司 | Compound shearing alignment pin |
| CN108411759A (en) * | 2018-04-28 | 2018-08-17 | 上海市城市建设设计研究总院（集团）有限公司 | The big box-beam structure of precast concrete of direction across bridge stem grafting method connection |
| CN108385505A (en) * | 2018-05-11 | 2018-08-10 | 湖南省交通规划勘察设计院有限公司 | A kind of seam system and its construction method, box girder bridge for UHPC precast segment box beams |
| CN108385505B (en) * | 2018-05-11 | 2023-11-21 | 湖南省交通规划勘察设计院有限公司 | Joint system for UHPC segment prefabricated box girder, construction method of joint system and box girder bridge |
| CN108660902A (en) * | 2018-06-19 | 2018-10-16 | 中国铁路总公司 | A kind of Railway Prestressed Concrete continuous bridge of precast segment pin-connected panel |
| CN108660908A (en) * | 2018-06-19 | 2018-10-16 | 中国铁路总公司 | A kind of prestressed concrete cable-stayed bridge of the beam prefabricated pin-connected panel of tower |
| CN109235288A (en) * | 2018-11-15 | 2019-01-18 | 天津城建大学 | The sealing structure and method of presstressed reinforcing steel duct in beam sections Mosaic face |
| CN109235288B (en) * | 2018-11-15 | 2023-11-24 | 天津城建大学 | Construction method of sealing structure of prestressed rib duct in joint surface of segmental beam |
| CN109826097A (en) * | 2019-02-18 | 2019-05-31 | 腾达建设集团股份有限公司 | A kind of interim prestressing force implementation method in the section of bridge subsection |
| CN110485250A (en) * | 2019-05-27 | 2019-11-22 | 天津城建大学 | The precast segment beam and its splicing construction and construction method of a kind of free cantilever erection bridge |
| CN110042792A (en) * | 2019-05-29 | 2019-07-23 | 周升华 | A kind of equipment that road surface mechanism and vehicular cleaning road surface are cleaned in automation |
| CN112609577A (en) * | 2020-11-23 | 2021-04-06 | 中国水利水电第四工程局有限公司 | Continuous beam segment prefabrication and assembly method |
| CN112458925A (en) * | 2020-12-02 | 2021-03-09 | 中交路桥建设有限公司 | Segment precast beam structure and construction method for splicing and combining bridge thereof |
| CN113216259A (en) * | 2021-06-08 | 2021-08-06 | 吉林建筑大学 | Method for applying prestress to concrete pipe gallery |
| CN113216259B (en) * | 2021-06-08 | 2022-07-22 | 吉林建筑大学 | Method for applying prestress to concrete pipe gallery |
| CN113512934A (en) * | 2021-07-08 | 2021-10-19 | 中铁第五勘察设计院集团有限公司 | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section |
| CN113512935A (en) * | 2021-07-08 | 2021-10-19 | 中铁第五勘察设计院集团有限公司 | Temporary connection structure of prefabricated spliced bridge and prefabricated beam section |
| CN114541252A (en) * | 2022-04-07 | 2022-05-27 | 安徽省交通规划设计研究总院股份有限公司 | Segment prestress assembled pier with core column and construction method |
| CN114855589A (en) * | 2022-05-07 | 2022-08-05 | 北京工业大学 | Prefabricated section bridge joint structure and construction method |
| CN114855589B (en) * | 2022-05-07 | 2024-05-03 | 北京工业大学 | Prefabricated segment bridge joint structure and construction method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA RAILWAY FIRST SURVEY + DESIGN INSTITUTE GROU Effective date: 20150629 Owner name: CHINA RAILWAY CORPORATION Free format text: FORMER OWNER: CHINA RAILWAY FIRST SURVEY + DESIGN INSTITUTE GROUP CO., LTD. Effective date: 20150629 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150629 Address after: 100844 Fuxing Road, Beijing, Haidian District, No. 10 Patentee after: CHINA RAILWAY CORPORATION Patentee after: China Railway First Survey & Design Institute Group Co., Ltd. Address before: 710043 Shaanxi province Xi'an Xiying Road No. two Patentee before: China Railway First Survey & Design Institute Group Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20180715 |