CN110258340A - A kind of segmented efficient construction method of groove profile continuous beam - Google Patents
A kind of segmented efficient construction method of groove profile continuous beam Download PDFInfo
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- CN110258340A CN110258340A CN201910501625.9A CN201910501625A CN110258340A CN 110258340 A CN110258340 A CN 110258340A CN 201910501625 A CN201910501625 A CN 201910501625A CN 110258340 A CN110258340 A CN 110258340A
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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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- 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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- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to a kind of segmented efficient construction methods of groove profile continuous beam, belong to the technical field of trough girder, it is the following steps are included: S1, by trough girder be divided into multiple beam sections, including span centre beam, central bearing point beam, end bay beam, and the length ratio of central sill, central bearing point beam, end bay beam is between 1:1:1 to 2:1:2, central bearing point beam is arranged two and is divided into the two sides of span centre beam, end bay beam is arranged two and is located at the side that two central bearing point beams are located remotely from each other, after putting up rack platform and having bound reinforcing bar, makes span centre beam and two central bearing point beams while being poured；S2, after carrying out tensioning to central sill, central bearing point beam, closure section reinforcing bar is bound, fixed stiff skeleton simultaneously pours closure section, closure section is between central sill and central bearing point beam, the width of closure section is one to three meters, and while closure section construction, the reinforcing bar for carrying out end bay beam binds operation；After S3, central sill and central bearing point beam close up, the casting of end bay beam is carried out, the present invention has the effect of improving the concrete structure quality of groove profile continuous beam.
Description
Technical field
The present invention relates to the technical fields of trough girder, more particularly, to a kind of efficient construction party of segmented of groove profile continuous beam
Method.
Background technique
Trough girder is in order to reduce the height from rail level to beam bottom, thus a kind of bridge shape for increasing under-clearance and proposing
Formula.Trough girder belongs to a kind of space plate-beam composite structure of complexity.
The girder of existing trough girder is mostly cast-in-place concrete molding.
Prior art among the above have the following deficiencies: for compared with large span and simultaneously across road river two-wire
Groove profile continuous beam, one-time-concreting amount of concrete is big, and structure belongs to large-span concrete structure, when the table temperature difference reaches in concrete
Certain limit may cause tensile strength of the surface pulling force more than concrete and crack occurs.The concrete cooling stage simultaneously
If cooling is too fast, due to concrete shrinkage, and by powerful frictional resistance, it may cause and shrinkage through crack occur, from
And the concrete structure quality of groove profile continuous beam is made to be deteriorated.
Summary of the invention
The object of the present invention is to provide a kind of points of the groove profile continuous beam of concrete structure quality for improving groove profile continuous beam
Segmentation efficient construction method.
Foregoing invention purpose of the invention has the technical scheme that
A kind of segmented efficient construction method of groove profile continuous beam, comprising the following steps:
S1, trough girder is divided into multiple beam sections, including span centre beam, central bearing point beam, end bay beam, and central sill, central bearing point beam, end bay beam
Length ratio between 1:1:1 to 2:1:2, central bearing point beam is arranged two and is divided into the two sides of span centre beam, end bay beam setting two
It is a and be located at the side that two central bearing point beams are located remotely from each other, after putting up rack platform and having bound reinforcing bar, make span centre beam
It is poured simultaneously with two central bearing point beams；
S2, tensioning is carried out to central sill, central bearing point beam, after tensioning, binds closure section reinforcing bar, fixed stiff skeleton simultaneously pours conjunction
Imperial section, for closure section between central sill and central bearing point beam, the width of closure section is one to three meters, while closure section construction,
The reinforcing bar for carrying out end bay beam binds operation；
After S3, central sill and central bearing point beam close up, the casting of end bay beam is carried out.
By using above-mentioned technical proposal, trough girder is divided into multiple beam sections, segmentation, which pours, can reduce each concrete
Length and side's amount are poured, the thermal stress cracks that mass concrete construction is easy to produce is avoided, ensure that concrete construction
Quality.The distribution of the multiple beam sections of trough girder point, and the length of each beam section will not differ too much, make span centre beam, central bearing point beam, side
The casting quality of bridge is close, facilitates the consistency of trough girder each section quality.
Setting support platform, bellows of having good positioning, then assembling reinforcement, can guarantee the accurate of presstressed reinforcing steel position, then into
It is poured while row span centre beam and two central bearing point beams, accelerates construction speed.When span centre beam and two central bearing point beams pour
Bi Hou carries out tensioning to the presstressed reinforcing steel of span centre beam and two central bearing point beams, after tensioning, binds the steel of two closure sections
Muscle, fixed stiff skeleton simultaneously pour two closure sections simultaneously, connect span centre beam, central bearing point beam.
While closure section construction, the reinforcing bar binding operation of two end bay beams is carried out, after closure section construction
Directly carry out end bay beam casting, make the construction integrated symmetric of trough girder while carrying out, Multi-working-surface be unfolded, accelerate construct into
Degree.
The present invention is further arranged to: the trough girder is box side trough girder, and trough girder includes bottom plate, box-shaped web,
When carrying out the casting of trough girder, baseplate zone is perfused first, and be poured into plate top surface for the first time, certain interval of time continues to pour
Box-shaped web is built, and being poured box-shaped web height is 0.5 to 1 times of bottom plate heights, later multiple laminated pouring residue two sides case
Shape web position.
By using above-mentioned technical proposal, on the basis of step pouring, substep casting is carried out, is further reduced every time
Concrete pours length and side's amount, avoids the thermal stress cracks that mass concrete construction is easy to produce, ensure that mixed
Solidifying soil construction quality.
The present invention is further arranged to: it is described before pouring first time concrete, on the outside of the outside of box-shaped web is fixed
Template fixes a square wood strip in the top surface of casting concrete.
By using above-mentioned technical proposal, square wood strip plays certain fixed function to concrete, when making concrete setting,
The top surface of concrete keeps relatively stable with the contact area of square wood strip, and when making concrete setting, top surface is not easy to shrink, and second
Square wood strip is taken out when secondary casting concrete, keeps the vertical flat side down at concrete joint surface twice straight.
The present invention is further arranged to: described after pouring first time concrete, the top of opposite outboard template is fixed
It is connected with channel steel.
By using above-mentioned technical proposal, channel steel makes outboard template on the horizontal direction perpendicular to trough girder length direction
Stability further increase, make be poured concrete when, be conducive to keep outboard template vertical state, to guarantee trough girder
Casting quality.
The present invention is further arranged to: it is described in step s3, end bay beam, central bearing point beam reserved steel bar connection use one
Half binding half welding.
By using above-mentioned technical proposal, prevent reinforcing bar and concrete since temperature change causes uncoordinated displacement, so that
Cracking is generated when concrete non-tensioning.
The present invention is further arranged to: it is described in step sl, the pre-buried junction steel plate on trough girder, junction steel plate be it is upper
Lower double-layer structure, and vertical and cross one another connecting plate is fixedly connected between the Dual-layer structure of junction steel plate, even
Fishplate bar and junction steel plate are welded to connect.
By using above-mentioned technical proposal, connecting plate makes the joint face of junction steel plate and stiff skeleton between beam channel
There is a distance, and be parallel on the section of the joint face of junction steel plate and stiff skeleton, the area of section of connecting plate, which is less than, to be connected
The area of section for connecing steel plate keeps the cutting of connecting plate more convenient, keeps the disassembly of stiff skeleton more convenient.
The present invention is further arranged to: it is described in step sl, span centre beam, central bearing point beam the upper surface of bottom plate position set
Set a two rows of junction steel plates, length direction of every row's junction steel plate perpendicular to trough girder, the top setting two of box-shaped web position
Arrange junction steel plate.
By using above-mentioned technical proposal, the setting of two rows of junction steel plates keeps the fixation to stiff skeleton more firm.
The present invention is further arranged to: it is described in step s 2, stiff skeleton includes vertical pole, cross bar and supporting element, vertical pole
It is parallel to the length direction of trough girder, cross bar is perpendicular to vertical pole and cross bar is fixedly connected on the both ends of vertical pole, and cross bar is perpendicular to branch
Plane where support member, and cross bar is located at the four corners of supporting element, supporting element is solid for the diagonal position of rectangular shape and supporting element
Fixed connection.
By using above-mentioned technical proposal, stiff skeleton is fixed to trough girder from the inside of trough girder, prevents from closing
There is crack because reinforcing bar and concrete temperature variation cause uncoordinated displacement in imperial section work progress.
The present invention is further arranged to: the cement bonded sand that casting concrete surface should be cut when pouring novel concrete
Slurry and the weak layer of pine, the concrete surface application water handled through dabbing are rinsed well, before newly-laid concrete, are sewn on to vertical construction old
One layer of cement paste is brushed on concrete surface, and the cement mortar of the one layer of 10-20mm in old concrete face upper berth is sewn on to divergence.
By using above-mentioned technical proposal, the removal of casting concrete wash cement mortar and the weak layer of pine and dabbing make
Casting concrete surface is more coarse, and the connection area between new-old concrete becomes larger, to make to combine between new-old concrete
Preferably；Water rinses dabbing surface, makes the dust etc. of the adherency on casting concrete surface be rinsed, is conducive to new and old coagulation
Combining closely between soil；The bonding shape of cement paste is preferable, plays adhesive effect to the concrete of vertical construction joints two sides, makes
Integraty between new-old concrete is stronger；Cement mortar also functions to certain adhesive effect, meanwhile, cement mortar has centainly
Intensity, load between the new-old concrete of horizontal construction joint two sides can be transmitted without easy to crack, take trough girder point
It is combined between the concrete that section pours by several times preferable.
In conclusion advantageous effects of the invention are as follows:
1. reducing each concreting length and side's amount by the way that trough girder is divided into multiple beam sections, avoiding large volume coagulation
The thermal stress cracks that soil construction is easy to produce, ensure that concrete construction quality；
2. further reducing pouring for each concrete by the multiple pouring type of layering that first bottom plate box-shaped web again is arranged
Length and side's amount, reduce thermal stress cracks；
3. keeping the vertical flat side down at the faying face of the concrete of laminated pouring straight by setting square wood strip.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram after trough girder first time concreting；
Fig. 3 is the structural schematic diagram after second of concreting of trough girder；
Fig. 4 is the cross-sectional view of stiff skeleton；
Fig. 5 is the cross-sectional view in Fig. 4 at A-A.
In figure, 1, trough girder；11, bottom plate；12, box-shaped web；2, span centre beam；21, central bearing point beam；22, closure section；23,
End bay beam；3, outboard template；31, channel steel；32, square wood strip；33, chamfering pressing plate；34, inner side template；4, pre-embedded steel slab；41, even
Fishplate bar；5, stiff skeleton；51, vertical pole；52, cross bar；53, supporting element.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
It referring to Fig.1, is a kind of segmented efficient construction method of groove profile continuous beam disclosed by the invention, including following step
It is rapid:
S1, trough girder 1 is divided for multiple beam sections, including span centre beam 2, central bearing point beam 21, end bay beam 23, and central sill, central bearing point beam
21, between 1:1:1 to 2:1:2, central bearing point beam 21 is arranged two and is divided into the two of span centre beam 2 the length ratio of end bay beam 23
Side, end bay beam 23 are arranged two and are located at the side that two central bearing point beams 21 are located remotely from each other, put up rack platform and tie up
After having pricked reinforcing bar, makes span centre beam 2 and two central bearing point beams 21 while being poured.
Referring to Figures 1 and 2, setting support platform, bellows of having good positioning, then assembling reinforcement, can guarantee presstressed reinforcing steel position
That sets is accurate, pre-buried junction steel plate, and junction steel plate is Dual-layer structure, and fixed between the Dual-layer structure of junction steel plate
It is connected with vertical and cross one another connecting plate 41, connecting plate 41 and junction steel plate are welded to connect, and make junction steel plate close to slot
The part of type beam 1 is located just at the surface of trough girder 1, then carries out casting while span centre beam 2 and two central bearing point beams 21, helps
In accelerating construction progress.The two rows of junction steel plates of upper surface setting of 11 position of bottom plate of central sill, central bearing point beam 21, every row's connection
For steel plate perpendicular to the length direction of trough girder 1, two rows of junction steel plates are arranged in the top of 12 position of box-shaped web.
Referring to Fig. 2 and Fig. 3, trough girder 1 is box side trough girder 1, and trough girder 1 includes bottom plate 11, box-shaped web 12, is carried out
When the casting of trough girder 1,11 region of bottom plate is perfused for the first time, and be poured into 11 top surface of bottom plate for the first time, certain interval of time after
It is continuous to pour box-shaped web 12, and it is poured 0.5 to 1 times of 12 height of box-shaped web for 11 height of bottom plate, second of casting box-shaped abdomen
12 region of plate, 12 position of multiple laminated pouring residue two sides box-shaped web carry out substep casting on the basis of step pouring,
Further reduce each concrete pours length and side's amount, avoids the temperature that mass concrete construction is easy to produce and answers
Power crack.
Referring to Fig. 2 and Fig. 3, before pouring first time concrete, in the fixed vertical outer side mold in the outside of box-shaped web 12
Chamfering pressing plate 33 is arranged in plate 3, and chamfering pressing plate 33 avoids gushing on 11 concrete of bottom plate when concreting at box-shaped web 12,
A square wood strip 32 is fixed in the top surface of casting concrete, when pouring first time concrete, fixes in the top surface of casting concrete
A piece square wood strip 32, when making concrete setting, top surface is not easy to shrink, and when second of casting concrete is drawn off, and makes twice
Vertical flat side down at concrete joint surface is straight；After pouring first time concrete, inner side template 34 is installed, opposite is outer
The top of side template 3 is fixedly connected with channel steel 31, and channel steel 31 makes the phase on the horizontal direction perpendicular to trough girder 1 of outboard template 3
It is relatively stable to position, then carry out the casting in second of 12 region of box-shaped web.
Referring to Fig.1, trough girder 1 is divided for multiple beam sections, segmentation, which pours, can reduce each concreting length and side
Amount, avoids the thermal stress cracks that mass concrete construction is easy to produce, ensure that concrete construction quality.Each beam section
Length will not differ and make the casting quality of span centre beam 2, central bearing point beam 21, end bay beam 23 close too much, facilitate trough girder 1
The consistency of each section quality.
S2, tensioning is carried out to span centre beam 2, central bearing point beam 21, after tensioning, binds 22 reinforcing bar of closure section, fixed stiffness
Skeleton 5 simultaneously pours closure section 22, and for closure section 22 between central sill and central bearing point beam 21, the width of closure section 22 is one to three
Rice, while closure section 22 is constructed, the reinforcing bar for carrying out end bay beam 23 binds operation；
Referring to Fig. 4 and Fig. 5, stiff skeleton 5 includes vertical pole 51, cross bar 52 and supporting element 53, and vertical pole 51 is parallel to the length of trough girder 1
Direction is spent, the both ends of vertical pole 51 are connect with the upper surface of junction steel plate respectively, and cross bar 52 is perpendicular to vertical pole 51, and cross bar 52 is fixed
Vertical pole 51 is connected to close to the position at itself both ends, cross bar 52 is perpendicular to 53 place plane of supporting element, and cross bar 52 is located at support
The four corners of part 53, supporting element 53 are fixedly connected for the diagonal position of rectangular shape and supporting element 53, make stiff skeleton 5 from slot
Trough girder 1 is fixed in the inside of type beam 1, prevents in 22 work progress of closure section because reinforcing bar and concrete temperature variation cause
It is uncoordinated displacement and there is crack.
After S3, central sill and central bearing point beam 21 close up, the casting of end bay beam 23 is carried out.
Referring to Fig.1, the reserved steel bar connection of end bay beam 23, central bearing point beam 21 is using half binding half welding.It is pouring
The cement mortar on casting concrete surface and the weak layer of pine, the concrete surface application water handled through dabbing should be cut when novel concrete
It rinses well, but must not have ponding, before newly-laid concrete, it is net that one layer of cement of brush on old concrete face is sewn on to vertical construction
Slurry, the cement mortar of the one layer of 10-20mm in old concrete face upper berth is sewn on to divergence.
The embodiment of present embodiment is presently preferred embodiments of the present invention, not limits protection of the invention according to this
Range, therefore: the equivalence changes that all structures under this invention, shape, principle are done, should all be covered by protection scope of the present invention it
It is interior.
Claims (9)
1. a kind of segmented efficient construction method of groove profile continuous beam, comprising the following steps:
S1, trough girder (1) is divided into multiple beam sections, including span centre beam (2), central bearing point beam (21), end bay beam (23), and central sill,
Central bearing point beam (21), end bay beam (23) length ratio between 1:1:1 to 2:1:2, central bearing point beam (21), which is arranged, and to be set up separately by two
In the two sides of span centre beam (2), end bay beam (23) is arranged two and is located at the side that two central bearing point beams (21) are located remotely from each other,
After putting up rack platform and having bound reinforcing bar, makes span centre beam (2) and two central bearing point beams (21) while being poured；
S2, tensioning is carried out to central sill, central bearing point beam (21), after tensioning, binds closure section (22) reinforcing bar, fixed stiff skeleton
(5) it and pours closure section (22), closure section (22) is located between central sill and central bearing point beam (21), and the width of closure section (22) is one
To three meters, while closure section (22) construct, the reinforcing bar for carrying out end bay beam (23) binds operation；
After S3, central sill and central bearing point beam (21) close up, the casting of end bay beam (23) is carried out.
2. a kind of segmented efficient construction method of groove profile continuous beam according to claim 1, it is characterised in that: the slot
Type beam (1) is box side trough girder (1), and trough girder (1) includes bottom plate (11), box-shaped web (12), carries out pouring for trough girder (1)
When note, bottom plate (11) region is perfused first, and be poured into bottom plate (11) top surface for the first time, certain interval of time continues to pour box-shaped
Web (12), and casting box-shaped web (12) is highly 0.5 to 1 times of bottom plate (11) height, multiple laminated pouring is remaining later
Two sides box-shaped web (12) position.
3. a kind of segmented efficient construction method of groove profile continuous beam according to claim 2, it is characterised in that: pouring
It is fixed outboard template (3) in the outside of box-shaped web (12) before first time concrete, one is fixed in the top surface of casting concrete
Square wood strip (32).
4. a kind of segmented efficient construction method of groove profile continuous beam according to claim 3, it is characterised in that: pouring
After first time concrete, channel steel (31) are fixedly connected at the top of opposite outboard template (3).
5. a kind of segmented efficient construction method of groove profile continuous beam according to claim 1, it is characterised in that: in step
In S3, the reserved steel bar connection of end bay beam (23), central bearing point beam (21) is using half binding half welding.
6. a kind of segmented efficient construction method of groove profile continuous beam according to claim 1, it is characterised in that: in step
In S1, the pre-buried junction steel plate on trough girder (1), junction steel plate is Dual-layer structure, and the Dual-layer knot of junction steel plate
Vertical and cross one another connecting plate (41) is fixedly connected between structure, connecting plate (41) and junction steel plate are welded to connect.
7. a kind of segmented efficient construction method of groove profile continuous beam according to claim 1, it is characterised in that: in step
In S1, central sill, central bearing point beam (21) bottom plate (11) position the two rows of junction steel plates of upper surface setting, every row's junction steel plate hangs down
Directly in the length direction of trough girder (1), two rows of junction steel plates are arranged in the top of box-shaped web (12) position.
8. a kind of segmented efficient construction method of groove profile continuous beam according to claim 7, it is characterised in that: in step
In S2, stiff skeleton (5) includes vertical pole (51), cross bar (52) and supporting element (53), and vertical pole (51) is parallel to the length of trough girder (1)
Direction is spent, cross bar (52) is fixedly connected on the both ends of vertical pole (51) perpendicular to vertical pole (51) and cross bar (52), and cross bar (52) is vertical
The plane where supporting element (53), and cross bar (52) is located at the four corners of supporting element (53), supporting element (53) is rectangular shape
And the diagonal position of supporting element (53) is fixedly connected.
9. a kind of segmented efficient construction method of groove profile continuous beam according to claim 1, it is characterised in that: pouring
The cement mortar on casting concrete surface and the weak layer of pine, the concrete surface application water handled through dabbing should be cut when novel concrete
It rinses well, before newly-laid concrete, one layer of cement paste of brush on old concrete face is sewn on to vertical construction, to horizontal construction joint
In the cement mortar of the one layer of 10-20mm in old concrete face upper berth.
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| CN201910501625.9A CN110258340A (en) | 2019-06-11 | 2019-06-11 | A kind of segmented efficient construction method of groove profile continuous beam |
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| CN113737652A (en) * | 2021-07-30 | 2021-12-03 | 中铁十九局集团第五工程有限公司 | Temporary supporting structure for simply supported channel beam |
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Application publication date: 20190920 |