CN108943374A - A kind of method for prefabricating of pre-buried steel board-like UHPC small box girder end tabula - Google Patents
A kind of method for prefabricating of pre-buried steel board-like UHPC small box girder end tabula Download PDFInfo
- Publication number
- CN108943374A CN108943374A CN201810584317.2A CN201810584317A CN108943374A CN 108943374 A CN108943374 A CN 108943374A CN 201810584317 A CN201810584317 A CN 201810584317A CN 108943374 A CN108943374 A CN 108943374A
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- China
- Prior art keywords
- template
- prefabricating
- box girder
- preformed hole
- uhpc
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0029—Moulds or moulding surfaces not covered by B28B7/0058 - B28B7/36 and B28B7/40 - B28B7/465, e.g. moulds assembled from several parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article
-
- 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
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- 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
- E01D2101/28—Concrete reinforced prestressed
Abstract
The invention discloses a kind of method for prefabricating of pre-buried steel board-like UHPC small box girder end tabula, using ultra-high performance concrete prefabricated case beam ontology, after predetermined strength to be achieved, in the prefabricated end bulkheads in the end of box beam ontology, the cast-in-place material of end bulkheads is ultra-high performance concrete or normal concrete, after end bulkheads reach predetermined strength, delayed bonding prestressed tendon tensioning operation is carried out, autoclave curing is integrally finally carried out to box beam ontology.Using prefabricated case beam ontology, UHPC is poured after cooperation or normal concrete forms end bulkheads, cast-in-place end bulkheads and prefabricated U HPC small box girder ontology effectively can be linked to be entirety, the thickness of end bulkheads is adjusted according to the casting concrete material property of can choose, the prefabricated efficiency of UHPC small box girder end tabula is effectively improved, is more suitable for the production of bridge industrial flow-line.
Description
Technical field
The present invention relates to science of bridge building technical field of structures, in particular to a kind of pre-buried steel board-like UHPC small box girder end is horizontal
Every method for prefabricating.
Background technique
In recent years, the Green Bridges mode of construction of rapid, low road interference, mute is actively sought and is enriched in China,
Bridge fabricated construction is vigorously advocated, and tries to explore application of the new material in packaged type bridges, having built large quantities of has
Representative packaged type bridges, the industrialized production of bridge, prefabricated construction have become main trend.
Although existing packaged type bridges category multiplicity, all have the shortcomings that respective: there is steel construction site welding (bolt) to connect
Amount is big, steel bridge deck has fatigue cracking；Steel-mix composite structure self weight it is larger, floorings can only partial precast, scene is poured
The amount of building is big；For prestressed reinforced concrete structure from great, lateral connection cracky, lasting hazard is more.UHPC material is in method
The bridge field of the country such as state and Malaysia has obtained significant progress, but its theoretical research of China focus mostly in T-type beam,
In three kinds of forms of broad box girder and π type beam, blank is essentially to the research of UHPC small box girder, and there are more transverse directions for T-type girder construction
Connection, live seam is more, is unfavorable for rapid construction；Broad box girder realizes fabricated construction by box beam longitudinal direction piecemeal, and scene is applied
Work workload is big and complicated；For π type beam there is only bridge floor longitudinal seam, site operation is convenient, and eliminates prestressing force, avoids pre-
The girder antiarch difference that stress tension generates, to ensure that the quality of transverse joint, reduce Calculation of Thickness of Bridge Deck Pavement, but prestressing force
Missing cause bridge span limited.The shortcomings that in view of existing packaged type bridges, Development of Novel fabricated construction is with preferably suitable
It answers the requirement of national development green building to become to be badly in need of.Ultra-high performance concrete small box girder light structure, cooperation slow cohesion are answered in advance
Structure anti-bending strength is prominent when power, and the connection between small box girder is carried out using UHPC material with can be convenient, and is very suitable for fast
Speedization build, UHPC small box girder end tabula be difficult to it is jointly prefabricated with beam body, and hold tabula be structure space stress important component,
It is necessary for developing the convenient method for prefabricating of UHPC small box girder end tabula.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of board-like UHPC of pre-buried steel of quick, prefabricated simplicity of constructing is small
The method for prefabricating of box beam end tabula.
Used technical solution to solve above-mentioned technical problem: a kind of pre-buried steel board-like UHPC small box girder end tabula
Method for prefabricating, comprising the following steps:
S1, the prefabricated case being made of top plate and bottom plate and web of ultra-high performance concrete is poured by exterior sheathing and inner template
Beam ontology, and respectively corresponded in the top plate and bottom plate and web that box beam body end is in same sectional position and be reserved with top plate
Preformed hole, bottom plate preformed hole and web preformed hole, the pre-buried delayed bonding prestressed tendon along longitudinal direction in box beam ontology are reserved in top plate
Inside steel plate built-in fitting, outside plate built-in fitting is respectively set in hole, bottom plate preformed hole and web preformed hole front and rear sides；
S2, after box beam ontology reaches predetermined strength, remove exterior sheathing and inner template；
S3, inner side template is installed in the end of box beam ontology, inner side template is welded and fixed with inside steel plate built-in fitting, top plate
Intert vertical reinforcement between preformed hole and bottom plate preformed hole, interts transverse steel between the two web preformed holes in left and right, with inside
Form spacing preset distance installs outboard template, and outboard template is welded and fixed with outside plate built-in fitting, vertical reinforcement and transverse direction
Reinforcing bar is between inner side template and outboard template；
S4, ultra-high performance concrete or normal concrete are poured to box beam chamber body to form end by top plate preformed hole
Portion's partition；
S5, after end bulkheads reach predetermined strength, carry out delayed bonding prestressed tendon tensioning operation；
S6, autoclave curing is integrally carried out to box beam ontology.
Preferably, inside steel plate built-in fitting, outside plate built-in fitting are formed by steel plate and welding of peg.
Preferably, the corresponding template peg of arranged distribution is distinguished in inner side template and outboard template.
Preferably, inner side template is staggeredly arranged with the template peg on outboard template.
Preferably, when pouring normal concrete, the spacing distance between inner side template and outboard template is increased accordingly.
Preferably, delayed bonding prestressed tendon is embedded in bottom plate and web.
Preferably, top plate preformed hole is aligned with bottom plate preformed hole in same vertical direction.
The utility model has the advantages that
(1) UHPC small box girder end tabula uses and is reserved with corresponding preformed hole respectively in top plate and bottom plate and web and wears
The mode for inserting reinforcing bar, pours UHPC or normal concrete after cooperation, can be effectively by cast-in-place end bulkheads and the small case of prefabricated U HPC
Beam ontology is linked to be entirety；
(2) it is welded by inner side template, outboard template and pre-buried steel plate built-in fitting, can quickly and easily fix interior side form
The lengthwise position of plate, outboard template also facilitates the spacing distance of adjustment inner side template and outboard template, i.e., according to casting concrete
Material selectivity adjusts the thickness of end bulkheads, effectively improves the prefabricated efficiency of UHPC small box girder end tabula, is more suitable for
The production of bridge industrial flow-line；
(3) by setting template peg, it can further improve the globality of end bulkheads Yu box beam ontology, be conducive to structure
Stress.
Detailed description of the invention
The present invention is described further with reference to the accompanying drawings and examples；
Fig. 1 is the transverse sectional view of box beam ontology in the embodiment of the present invention；
Fig. 2 is the longitudinal cross-section schematic diagram of box beam ontology in the embodiment of the present invention.
Specific embodiment
Referring to figs. 1 to Fig. 2, the method for prefabricating of the board-like UHPC small box girder of pre-buried steel of the present invention end tabula, including following step
It is rapid:
S1, that ultra-high performance concrete is poured by exterior sheathing and inner template is prefabricated by 30 structure of top plate 10, bottom plate 20 and web
At box beam ontology, and it is right respectively on the top plate 10, bottom plate 20 and web 30 that box beam body end is in same sectional position
Should be reserved with top plate preformed hole 11, bottom plate preformed hole 21 and web preformed hole 31, top plate preformed hole 11 and bottom plate preformed hole 21 it
Between alignment be in same vertical direction, left and right two web preformed holes 31 also be aligned be in same level direction, in box beam ontology
Bottom plate 20, the pre-buried delayed bonding prestressed tendon along longitudinal direction of web 30, subsequent inner side template and outboard template are fixed for convenience,
Inside steel plate built-in fitting 40, outside is respectively set in top plate preformed hole 11, bottom plate preformed hole 21 and 31 front and rear sides of web preformed hole
Steel plate built-in fitting 50, inside steel plate built-in fitting 40, outside plate built-in fitting 50 are formed by steel plate and welding of peg, and peg is embedded in
In top plate and bottom plate and web, inside steel plate built-in fitting 40, outside plate built-in fitting 50 position according to the position of tabula determine adjust
It is whole.Wherein, the similar material of ultra-high performance concrete (UHPC, Ultra-High Performance Concrete) can be adopted
With the high performance cement-base composite material such as CRC, DSP, FRHPC, HPFRCC, RPC, STC, UHPFRC.
S2, after box beam ontology reaches predetermined strength, remove exterior sheathing and inner template.
S3, inner side template 60 is installed in the end of box beam ontology, inner side template 60 and the welding of inside steel plate built-in fitting 40 are solid
It is fixed, vertical reinforcement 70 is interted by top plate preformed hole 11, bottom plate preformed hole 21, passes through the interspersed cross of the web preformed hole 31 of left and right two
To reinforcing bar 80, outboard template 90 is installed with the position that inner side template 60 is spaced a predetermined distance, outboard template 90 and outside plate are pre-
Embedded part 50 is welded and fixed, and the welding position of outboard template 90 can be adjusted flexibly according to tabula thickness.Wherein, in order to improve end
The globality of partition and box beam ontology, in the template bolt corresponding with arranged distribution is distinguished on outboard template 90 of inner side template 60
Nail, the length of template peg is preferably 5cm, and inner side template 60 is staggeredly arranged with the template peg on outboard template 90, and keeps away
Open interspersed vertical reinforcement 70 and transverse steel 80.
S4, by the top plate preformed hole 11 on top plate 10 to box beam chamber body pour ultra-high performance concrete (UHPC) or
Normal concrete is to form end bulkheads.In order to reduce the material utilization amount of UHPC, the material of cast-in-place UHPC is readily modified as commonly mixed
Solidifying soil, at this point, the spacing distance needs between inner side template 60 and outboard template 90 increase accordingly.
S5, after end bulkheads reach predetermined strength, carry out delayed bonding prestressed tendon tensioning operation；
S6, autoclave curing is integrally carried out to box beam ontology.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned embodiment party
Formula within the scope of knowledge possessed by those of ordinary skill in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (7)
1. a kind of method for prefabricating of pre-buried steel board-like UHPC small box girder end tabula, which comprises the following steps:
S1, the prefabricated box beam sheet being made of top plate and bottom plate and web of ultra-high performance concrete is poured by exterior sheathing and inner template
Body, and respectively correspond in the top plate and bottom plate and web that box beam body end is in same sectional position that be reserved with top plate reserved
Hole, bottom plate preformed hole and web preformed hole, the pre-buried delayed bonding prestressed tendon along longitudinal direction in box beam ontology, top plate preformed hole,
Inside steel plate built-in fitting, outside plate built-in fitting is respectively set in bottom plate preformed hole and web preformed hole front and rear sides；
S2, after box beam ontology reaches predetermined strength, remove exterior sheathing and inner template；
S3, inner side template is installed in the end of box beam ontology, inner side template is welded and fixed with inside steel plate built-in fitting, and top plate is reserved
Intert vertical reinforcement between hole and bottom plate preformed hole, interts transverse steel between the two web preformed holes in left and right, with inner side template
It is spaced a predetermined distance installation outboard template, outboard template is welded and fixed with outside plate built-in fitting, vertical reinforcement and transverse steel
It is between inner side template and outboard template；
S4, ultra-high performance concrete or normal concrete to box beam chamber body are poured by top plate preformed hole with formed end every
Plate；
S5, after end bulkheads reach predetermined strength, carry out delayed bonding prestressed tendon tensioning operation；
S6, autoclave curing is integrally carried out to box beam ontology.
2. the method for prefabricating of the board-like UHPC small box girder of pre-buried steel according to claim 1 end tabula, it is characterised in that: interior
Side steel plate built-in fitting, outside plate built-in fitting are formed by steel plate and welding of peg.
3. the method for prefabricating of the board-like UHPC small box girder of pre-buried steel according to claim 1 or 2 end tabula, feature exist
In: the corresponding template peg of arranged distribution is distinguished in inner side template and outboard template.
4. the method for prefabricating of the board-like UHPC small box girder of pre-buried steel according to claim 3 end tabula, it is characterised in that: interior
Side template is staggeredly arranged with the template peg on outboard template.
5. the method for prefabricating of the board-like UHPC small box girder of pre-buried steel according to claim 1 end tabula, it is characterised in that: when
When pouring normal concrete, the spacing distance between inner side template and outboard template is increased accordingly.
6. the method for prefabricating of the board-like UHPC small box girder of pre-buried steel according to claim 1 end tabula, it is characterised in that: slow
Binding prestress reinforcement is embedded in bottom plate and web.
7. the method for prefabricating of the board-like UHPC small box girder of pre-buried steel according to claim 1 end tabula, it is characterised in that: top
Plate preformed hole is aligned with bottom plate preformed hole in same vertical direction.
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| CN201810584317.2A CN108943374A (en) | 2018-06-07 | 2018-06-07 | A kind of method for prefabricating of pre-buried steel board-like UHPC small box girder end tabula |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855740A (en) * | 2022-04-24 | 2022-08-05 | 广东省水利水电第三工程局有限公司 | Prefabrication construction method of slender concrete slab and hoisting tool thereof |
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| CN114855740A (en) * | 2022-04-24 | 2022-08-05 | 广东省水利水电第三工程局有限公司 | Prefabrication construction method of slender concrete slab and hoisting tool thereof |
| CN114855740B (en) * | 2022-04-24 | 2023-12-12 | 广东省水利水电第三工程局有限公司 | Prefabrication construction method of slender concrete slab and hoisting tool thereof |
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Application publication date: 20181207 |