CN105064195B - The fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge and its construction method of precast assembly - Google Patents

The fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge and its construction method of precast assembly Download PDF

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CN105064195B
CN105064195B CN201510455151.0A CN201510455151A CN105064195B CN 105064195 B CN105064195 B CN 105064195B CN 201510455151 A CN201510455151 A CN 201510455151A CN 105064195 B CN105064195 B CN 105064195B
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concrete
steel
lower flange
fish belly
ladle
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CN105064195A (en
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陈齐风
李丽琳
郝天之
邱波
高建明
刘世建
徐赵东
刘沐宇
罗月静
黎力韬
杨雨厚
李淑芬
王莹
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Guangxi Transportation Research Institute
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Guangxi Transportation Research Institute
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Abstract

Simply supported girder bridge and its construction method are combined the invention discloses a kind of fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly, using prefabricated fish belly Wavelike steel webplate beam and precast concrete floorings, ladle concrete component, the stretch-draw prestressing force in the concrete of lower flange ladle concrete component are used in fish belly Wavelike steel webplate lower flange of girder edge.Bridge deadweight can be greatly reduced using fish belly waveform in web, ladle concrete component is used in lower flange and reserved prestressed pore passage significantly improves the rigidity and bending resistance of Wavelike steel webplate beam beam body with stretch-draw prestressing force, the air exposure of Wavelike steel webplate combination beam external prestressing steels is solved the problems, such as, the durable and unfailing performance of presstressed reinforcing steel greatly improved.Meanwhile, the Wavelike steel webplate prestressing force steel reinforced concrete of structure combination simply supported beam can be transported easily, prefabricated, assembly, be fully able to meet factory-made component and the requirement of live Fast Installation.Accordingly, inventor has also set up corresponding construction method, using the method construction safety, convenient, fast.

Description

Precast assembly fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge and Its construction method
Technical field
The invention belongs to the fish belly Wavelike steel webplate body in communications and transportation bridge engineeting field, more particularly to a kind of precast assembly Interior prestressing force steel reinforced concrete combination simply supported girder bridge and its construction method.
Background technology
With the development of multilevel traffic infrastructure, in denser population areas, Urban Bridge construction or highway cross-line are applied Man-hour, the problem of being faced with bridge structure work progress uninterrupted traffic under the conditions of heavy traffic, this is to working security requirement High, construction period requires short, while also to take into account landscape and environmental requirement.Wavelike steel webplate composite beam bridge has from heavy and light, just The big advantage of degree, but the durability of its external pre-stress bundle constrains the extensive use of the structure in the complexity of construction.
The content of the invention
The technical problem to be solved in the present invention is to propose that one kind can quick prefabricated assembly, uninterrupted traffic, safe and reliable, resistance to Long property is strong, fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge and its construction party of the precast assembly of environmental protection Method.
In order to solve the above technical problems, the present invention uses following technical scheme:The fish belly Wavelike steel webplate body of precast assembly Interior prestressing force steel reinforced concrete combines simply supported girder bridge, using prefabricated fish belly Wavelike steel webplate beam and precast concrete floorings, in fish belly ripple Shape steel web beam lower flange uses ladle concrete component, and tensioning in advance should in the ladle concrete component inner concrete of lower flange Power.
The ratio of rise to span of steel reinforced concrete combination simply supported girder bridge is controlled between 1/15-1/20, and lower flange fish belly line style is catenary Or parabola.
The control of the ratio between the bearing depth of section and span centre maximum height of steel reinforced concrete combination simply supported girder bridge is between 1/2-2/3.
The fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of above-mentioned precast assembly combines the construction method of simply supported girder bridge, including Following steps:
<1>Precast concrete floorings and prefabricated fish belly Wavelike steel webplate beam in advance
During prefabricated fish belly Wavelike steel webplate beam, the steel portion of the lower flange ladle concrete component of welding processing prefabricated unit Point, using girder steel beam stand, by lower flange ladle concrete component, Wavelike steel webplate, top flange plate, web steel column, bearing Web, bearing ribbed stiffener, bearing lower flange plate weld are into the beam prefabricated unit of monolithic fish belly Wavelike steel webplate;In lower flange, ladle is mixed Banding steel cage and the elongated setting bellows in component in solidifying soil component, bellows are passed through in the ladle concrete component of lower flange The diaphragm plate and by support wire of punching;Lower flange ladle concrete component wrapper sheet is welded afterwards, and the oblique template of concrete is installed, poured Build lower flange ladle concrete component inner concrete;
<2>On-site hoisting
After the completion of the ladle concrete component inner concrete maintenance of lower flange, prefabricated fish belly Wavelike steel webplate beam is transported and applied Work scene simultaneously positions lifting;Between multi-disc fish belly Wavelike steel webplate beam, connected using open web type diaphragm plate;It is existing after the completion of welding The cast-in-place block end crossbeam in field, hoisting prefabricated concrete slab, pours the wet joint concrete of floorings afterwards;
<3>Stretch-draw prestressing force
After the completion of concrete curing, the presstressed reinforcing steel in the ladle concrete component of tensioning lower flange forms precast assembly Fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combines simply supported girder bridge.
The lifting age of precast concrete floorings, concrete slab was using reserved slotted eye and sets more than 180 days Connection reinforcing bar in reserved slotted eye, is connected during lifting by reserved steel bar in cast-in-place connection top flange upper surface cluster type WELDING STUDS and hole Connect.
The beam prefabricated unit of each fish belly Wavelike steel webplate includes two panels wave beams;Along Wavelike steel webplate one is set every 2-4m Road web steel column, Wavelike steel webplate is connected on front and rear border with steel column, in up-and-down boundary and steel top flange, ladle concrete bottom wing Edge is connected, and web steel column is connected with top flange plate jointly with web.
Lower flange ladle concrete component is connected with fish belly Wavelike steel webplate, every 2- in the ladle concrete component of lower flange The lower section of 4m correspondence web steel columns sets the diaphragm plate that punches in a lower flange ladle concrete component, and in lower flange, ladle is mixed Arrangement connection peg on web, base plate and the wrapper sheet of solidifying soil component, lower flange ladle concrete component inner concrete is whole pre- Unit processed completes, cast-in-place again after built-in reinforcing bar and bellows.
Lower flange ladle concrete component inner concrete uses particulate continuous grading anti-crack concrete;The transverse direction of floorings is wet Seam uses rapid hardening slightly expanded concrete, and longitudinal wet joint uses fast hardening concrete.
Web and roof and floor surface layout WELDING STUDS group near bearing;Cut using long and short two kinds top flange plate upper surface Power follows closely arrangement, is even distribution type, and the length of short WELDING STUDS is 5-10cm;Long WELDING STUDS is cluster type, and length is 20-25cm.
Open web type diaphragm plate is made up of open web type tabula top boom, lower boom, brace, is connected between each rod member using gusset plate Connect, wherein tabula top boom is linked together using gusset plate with web steel column.
To meet the strict demand of multilevel traffic construction, inventor devises a kind of fish belly Wavelike steel webplate of precast assembly Prestressing with bond steel reinforced concrete combines simply supported girder bridge, using prefabricated fish belly Wavelike steel webplate beam and precast concrete floorings, in fish belly Wavelike steel webplate lower flange of girder edge uses ladle concrete component, and tensioning in advance should in the ladle concrete component inner concrete of lower flange Power.Wherein, bridge deadweight can be greatly reduced using fish belly waveform in web, ladle concrete component is used in lower flange and reserved pre- Stress duct is remarkably improved the rigidity and bending resistance of Wavelike steel webplate beam beam body with stretch-draw prestressing force, solves waveform steel abdomen The air exposure problem of plate combination beam external prestressing steels, greatly improved the durable and unfailing performance of presstressed reinforcing steel.Meanwhile, should The Wavelike steel webplate prestressing force steel reinforced concrete combination simply supported beam of structure can be transported easily, prefabricated, assembly, be fully able to meet factory pre- Component processed and the requirement of live Fast Installation.Accordingly, inventor has also set up corresponding construction method, is constructed and pacified using the method Entirely, it is convenient, fast.
Brief description of the drawings
Fig. 1 is that the structure of the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge of precast assembly of the present invention is stood Face schematic diagram.
Fig. 2 is that the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly of the present invention combines prefabricated mixed in simply supported girder bridge The layout drawing of solidifying soil floorings.
Fig. 3 is the layout drawing of reserving hole and reinforcing bar on monolithic floorings in Fig. 2 prefabricated bridges.
Fig. 4 is that the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge span centre of precast assembly of the present invention is transversal Face figure.
Fig. 5 is the cross-sectional view of single prefabricated unit.
Fig. 6 is top flange support concrete cast-in-situ and WELDING STUDS layout drawing.
Fig. 7 is bearing position arrangement facade detail drawing.
Fig. 8 be using precast assembly of the present invention fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combine simply supported girder bridge certain City intersection overbridge 40m main span elevation.
Fig. 9 is main span span centre cross-sectional view in Fig. 8.
Figure 10 is main span bearing cross-sectional view in Fig. 8.
Figure 11 is main span lower flange ladle concrete component cross-sectional view in Fig. 8.
Figure 12 is lower flange ladle concrete component stereogram in Fig. 8.
Figure 13 is prefabricated fish belly Wavelike steel webplate girder segment stereogram in Fig. 8.
In figure:1 precast concrete floorings, 1a reserves slotted eye, and 1b reserves connection reinforcing bar in slotted eye, 1c prefabricated bridges week The tabula that punches in the wet seam connection reinforcing bar on side, 2 lower flange ladle concrete components, 2a lower flanges ladle concrete component Under plate, 2b connection pegs, 2c lower flanges ladle concrete component inner concrete, 2d lower flanges ladle concrete component wrapper sheet, 2e Edge of a wing ladle concrete component base plate, 2f lower flanges ladle concrete component web, 3 Wavelike steel webplates 4, top flange plate, 5 webs Steel column, 6 bearing webs, 7 bearing ribbed stiffeners;7a bearing support ribbed stiffeners, 7b bearing transverse stiffeners, 7c bearings are vertically put more energy into On rib, 8 bearing bottom wing listriums, the 9 beam prefabricated units of fish-bellied type Wavelike steel webplate, 10 open web type diaphragm plates, 10a open web type diaphragm plates Chord member, 10b open web type diaphragm plate braces, 10c open web type diaphragm plate lower booms, 10d gusset plates, 11 block end crossbeams, 12 bridges Presstressed reinforcing steel in the wet seam in face, the horizontal wet seams of 12a, 12b longitudinal wet joints, 13 lower flange ladle concrete components, 14 is short Shearing on the stringer set up under WELDING STUDS, 15 top flange plate supports, 16 long WELDING STUDSs, 17 prefabricated bridges, 18 stringers Nail, 19 bearing webs and roof and floor surface WELDING STUDS group.
Embodiment
First, the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly combines the basic structure of simply supported girder bridge
Using prefabricated fish belly Wavelike steel webplate beam and precast concrete floorings, adopted in fish belly Wavelike steel webplate lower flange of girder edge Ladle concrete component is used, the stretch-draw prestressing force in the concrete of lower flange ladle concrete component.(see Fig. 1), its ratio of rise to span Control is between 1/15-1/20, and lower flange fish belly line style is catenary or parabola;Its bearing depth of section is maximum high with span centre The control of the ratio between degree is between 1/2-2/3.Length control close to standoff region web along girder is true according to the design shear of girder Fixed, the shearing near bearing should be met:
V≤tfhffv+0.75Agfgtanθ+Asfstanθ
In formula, V is design shear, and tf is web thickness, and hf is web height, and fv is web shearing strength design load, Ag For the steel strand wires gross area, fg is steel strand wires tensile strength design load, and θ is that steel strand wires or the ladle concrete edge of a wing are pressed from both sides with horizontal direction Angle, As is ladle edge of a wing steel area, and fs is ladle edge of a wing steel tensile strength design load.
2nd, the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly combines the construction method of simply supported girder bridge
<1>Precast concrete floorings and prefabricated fish belly Wavelike steel webplate beam in advance
The lifting age of precast concrete floorings more than 180 days, makes influence drop of the floorings shrinkage and creep to structure To reduced levels, concrete slab is using reserved slotted eye 1a and sets connection reinforcing bar 1b in reserved slotted eye, by existing during lifting Connection top flange upper surface cluster type WELDING STUDS 16 is poured with being connected reinforcing bar 1b connections in reserved slotted eye.(Fig. 2 and Fig. 3)
During prefabricated fish belly Wavelike steel webplate beam, the steel of the lower flange ladle concrete component 2 of welding processing prefabricated unit Part, using girder steel beam stand, by lower flange ladle concrete component 2, Wavelike steel webplate 3, top flange plate 4, web steel column 5th, bearing web 6, bearing ribbed stiffener 7, bearing bottom wing listrium 8 are welded into the beam prefabricated unit 9 of monolithic fish belly Wavelike steel webplate;Under Banding steel cage and the elongated setting bellows in component in edge of a wing ladle concrete component 2, bellows pass through lower flange ladle The diaphragm plate 2a and by support wire of punching in concrete component;Wrapper sheet 2d is welded afterwards, and the oblique template of concrete is installed, poured down Edge of a wing ladle concrete component inner concrete 2c;(see Fig. 1 and Fig. 4)
Wherein, each beam prefabricated unit of fish belly Wavelike steel webplate includes two panels wave beams (see Fig. 5);It is every along Wavelike steel webplate One of web steel column 5 is set every 2-4m, Wavelike steel webplate is connected on front and rear border with steel column, up-and-down boundary and steel top flange, Ladle concrete lower flange is connected, and web steel column 5 is connected with top flange plate 4 jointly with web 3.
Lower flange ladle concrete component is connected with fish belly Wavelike steel webplate 1, in the ladle concrete component of lower flange every The lower section of 2-4m correspondence webs steel column 5 sets the diaphragm plate 2a that punches in a lower flange ladle concrete component, in lower flange Arrangement connection peg 2b (wrapper sheet 2d does not burn-on first), lower flange on web 2f, base plate 2e and the wrapper sheet 2d of ladle concrete component Ladle concrete component inner concrete 2c completes in whole prefabricated unit, cast-in-place again after built-in reinforcing bar and bellows.Due to The steel construction of lower flange ladle concrete component is hatch frame, therefore sets and punch diaphragm plate to increase the globality of structure;Adopt The cast-in-place construction of concrete can be facilitated to greatest extent with ladle plate, the whole of lower flange concrete and steel lower flange is effectively increased Body.When close bearing position beam section height is smaller, lower flange ladle concrete component can use high strength steel with web, but Maximum intensity is no more than 2 times of main body steel strength;When anti-depth of section is smaller, girder steel shearing strength is not enough, it is contemplated that adopt With high strength steel to bear larger shearing.
Lower flange ladle concrete component inner concrete 2c uses particulate continuous grading anti-crack concrete, can effectively wrap Wrap up in bellows and prevent that crackle from occurring;The wet seam 12a of transverse direction of floorings uses rapid hardening slightly expanded concrete, longitudinal wet joint 12b uses fast hardening concrete so that floorings are longitudinally obtaining certain precompression, are conducive to the overall stress of bridge structure, And can effectively prevent that floorings from ftractureing, improve floorings durability.
, bearing web and roof and floor surface WELDING STUDS group 19, the cast-in-place concrete block end to connect the later stage are set Crossbeam;Top flange plate upper surface uses long and short two kinds of WELDING STUDS arrangements, and short WELDING STUDS 14 is even distribution type, short WELDING STUDS Length is 5-10cm, to cast-in-place top flange plate support 15;Long WELDING STUDS 16 is cluster type, and length is 20-25cm, according to prefabricated The position distribution of floorings connecting hole, to connect precast concrete floorings 1.(see Fig. 6)
<2>On-site hoisting
After the completion of lower flange ladle concrete component inner concrete 2c maintenances, prefabricated fish belly Wavelike steel webplate beam is transported Job site simultaneously positions lifting;Between multi-disc fish belly Wavelike steel webplate beam, connected using open web type diaphragm plate 10;Welding is completed Afterwards, field cast-in-place block end crossbeam 11, hoisting prefabricated concrete slab 1, pours the wet concrete of seam 12 of floorings afterwards;
Open web type diaphragm plate is made up of open web type tabula top boom 10a, lower boom 10b, brace 10c, is adopted between each rod member With gusset plate 10d connections, wherein tabula top boom is linked together using gusset plate 10d with web steel column 5.
<3>Stretch-draw prestressing force
After the completion of concrete curing, the presstressed reinforcing steel 13 in tensioning lower flange ladle concrete component 2 forms precast assembly Fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge.
3rd, the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly combines the application of simply supported girder bridge
The main span across footpath of certain city intersection overbridge is 40m, and two-way six-lane, bridge lateral design width is 21.5m, under The track major trunk roads of city eight are crossed in portion, and owner requires to suspend traffic, therefore uses the fish belly of precast assembly proposed by the present invention Wavelike steel webplate prestressing with bond steel reinforced concrete combines simply supported girder bridge scheme.
Main span is 40m, and ratio of rise to span is chosen for 1/16, and span centre girder steel is highly 3.0m, and support thickness is 0.1m, bridge floor thickness of slab Spend for 0.2m, bearing position girder steel is highly 1.5m.Monolithic girder steel spacing elects 3m as, and left and right sides cantilever chooses 2.2m, middle part Cantilever is chosen in 2.0m, lower flange ladle concrete component sets 8 deformed bar holes altogether, and a branch of 7 φ is used per hole 15.2mm1860 prestress wires.Laterally using 6 prefabricated fish belly Wavelike steel webplate prestressing force steel reinforced concrete combination simply supported beams.The bridge The facade of main span is shown in Fig. 8, and span centre is transversal to meet personally Fig. 9, and bearing is transversal to meet personally Figure 10, the section soil of lower flange ladle concrete component See Figure 11-12 with stereogram, the stereogram of prestressing force Wavelike steel webplate combination beam girder steel prefabricated subsection is shown in Figure 13.
The method that the present invention is used completed main span steel beam lifting in 2-3 days after the completion of girder steel is prefabricated, and at night Concrete slab is lifted, situ wet operation amount is small, lifting is quick, safety, no airborne dust operation significantly reduces Urban Bridge and applied Obstruction of the work to traffic.

Claims (10)

1. a kind of fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly combines the construction method of simply supported girder bridge, its feature It is to comprise the following steps:
<1>Precast concrete floorings and prefabricated fish belly Wavelike steel webplate beam in advance
During prefabricated fish belly Wavelike steel webplate beam, the steel parts of the lower flange ladle concrete component of welding processing prefabricated unit, Using girder steel beam stand, by lower flange ladle concrete component, Wavelike steel webplate, top flange plate, web steel column, bearing abdomen Plate, bearing ribbed stiffener, bearing lower flange plate weld are into the beam prefabricated unit of monolithic fish belly Wavelike steel webplate;In lower flange ladle coagulation Banding steel cage and the elongated setting bellows in component in native component, bellows pass through through lower flange component diaphragm plate with holes Support wire;Wrapper sheet is welded afterwards, and the oblique template of concrete is installed, lower flange ladle concrete component inner concrete is poured;
<2>On-site hoisting
After the completion of the ladle concrete component inner concrete maintenance of lower flange, prefabricated fish belly Wavelike steel webplate beam is transported into construction existing Field simultaneously positions lifting;Between multi-disc fish belly Wavelike steel webplate beam, connected using open web type diaphragm plate;After the completion of welding, scene is existing Block end crossbeam is poured, afterwards hoisting prefabricated concrete slab, pour the wet joint concrete of floorings;
<3>Stretch-draw prestressing force
After the completion of concrete curing, the presstressed reinforcing steel in the ladle concrete component of tensioning lower flange forms the fish belly of precast assembly Wavelike steel webplate prestressing with bond steel reinforced concrete combines simply supported girder bridge.
2. construction method according to claim 1, it is characterised in that:The lifting age of the precast concrete floorings exists More than 180 days, concrete slab was using cast-in-place hole and the reserved steel bar in cast-in-place hole is reserved, by cast-in-place connection during lifting Edge of a wing upper surface cluster type WELDING STUDS is connected with reserved steel bar in hole.
3. construction method according to claim 1, it is characterised in that:Each beam prefabricated unit of fish belly Wavelike steel webplate Including two panels wave beams;One of web steel column is set every 2-4m along Wavelike steel webplate, Wavelike steel webplate is in front and rear border and steel Post is connected, and is connected in up-and-down boundary with steel top flange, ladle concrete lower flange, and web steel column and web are jointly and top flange plate Connection.
4. construction method according to claim 1, it is characterised in that:The lower flange ladle concrete component and fish belly ripple Shape steel web is connected, and the tabula that punches is set every the lower section of 2-4m correspondence web steel columns in the ladle concrete component of lower flange Plate, is arranged on the web, base plate and wrapper sheet of lower flange ladle concrete component in WELDING STUDS, lower flange ladle concrete component Concrete complete in whole prefabricated unit, it is cast-in-place again after built-in reinforcing bar and bellows.
5. construction method according to claim 1, it is characterised in that:Coagulation in the lower flange ladle concrete component Soil uses particulate continuous grading anti-crack concrete;The wet seam of transverse direction of the floorings uses rapid hardening slightly expanded concrete, longitudinal direction Wet seam uses fast hardening concrete.
6. construction method according to claim 1, it is characterised in that:Web and roof and floor surface cloth near the bearing Put WELDING STUDS group;The top flange plate upper surface uses long and short two kinds of WELDING STUDS arrangements, and short WELDING STUDS is even distribution type, short The length of WELDING STUDS is 5-10cm;Long WELDING STUDS is cluster type, and length is 20-25cm.
7. construction method according to claim 1, it is characterised in that:The open web type diaphragm plate is winded up by open web type tabula Using gusset plate connection between bar, lower boom, brace composition, each rod member, wherein tabula top boom is using gusset plate and web steel Post links together.
8. the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete group for the precast assembly that construction method described in usage right requirement 1 is built Close simply supported girder bridge.
9. the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly combines simply supported girder bridge according to claim 8, its It is characterised by that the ratio of rise to span of steel reinforced concrete combination simply supported girder bridge is controlled between 1/15-1/20, lower flange fish belly line style is catenary Or parabola.
10. the fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete of precast assembly combines simply supported girder bridge according to claim 8, its It is characterised by the control of the ratio between the bearing depth of section and span centre maximum height of steel reinforced concrete combination simply supported girder bridge between 1/2-2/3.
CN201510455151.0A 2015-07-29 2015-07-29 The fish belly Wavelike steel webplate prestressing with bond steel reinforced concrete combination simply supported girder bridge and its construction method of precast assembly Active CN105064195B (en)

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CN110258339A (en) * 2019-06-05 2019-09-20 中建八局第三建设有限公司 A kind of overbridge roof beam structure bridge construction method
CN112267383A (en) * 2020-10-14 2021-01-26 中国建筑第八工程局有限公司 Construction method of prefabricated bridge deck steel-concrete composite beam
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