CN208440963U - A kind of UHPC small box girder structure - Google Patents
A kind of UHPC small box girder structure Download PDFInfo
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- CN208440963U CN208440963U CN201820882162.6U CN201820882162U CN208440963U CN 208440963 U CN208440963 U CN 208440963U CN 201820882162 U CN201820882162 U CN 201820882162U CN 208440963 U CN208440963 U CN 208440963U
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- box beam
- top plate
- web
- uhpc
- box girder
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 17
- 210000002435 Tendons Anatomy 0.000 claims abstract description 16
- 230000003111 delayed Effects 0.000 claims abstract description 16
- 238000005192 partition Methods 0.000 claims abstract description 5
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 4
- 238000005755 formation reaction Methods 0.000 claims abstract description 4
- 230000003014 reinforcing Effects 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000004567 concrete Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000001070 adhesive Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004574 high-performance concrete Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000002045 lasting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
The utility model discloses a kind of UHPC small box girder structures, including multiple box beam ontologies being connected by longitudinal seam, box beam ontology is by the prefabricated formation of ultra-high performance concrete, box beam ontology is by top plate, bottom plate, web, span centre partition and end bulkheads are constituted, delayed bonding prestressed tendon is embedded in box-like body along longitudinal direction, it is equipped in box beam body end and the inner side template and outboard template that part is fixedly connected is bolted, integrally formed end bulkheads are poured between inner side template and outboard template, the Thin-walled Box Girder that box beam ontology is made of UHPC material, effectively save material, Liang Chong alleviates about 40%, delayed bonding prestressed tendon is embedded in box beam ontology, further save material, reduce deck-molding, avoid the corrosion and replacement problem of external pre-stress bundle, the maintenance cost during operation is greatly reduced.
Description
Technical field
The utility model relates to science of bridge building technical field of structures, in particular to a kind of UHPC small box girder structure.
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.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of simple structures, the UHPC small box girder of easy construction
Structure.
Used technical solution to solve above-mentioned technical problem: a kind of UHPC small box girder structure, including multiple adjacent
Box beam ontology, the box beam ontology by the prefabricated formation of ultra-high performance concrete, the box beam ontology by top plate and bottom plate, web, across
Middle partition and end bulkheads are constituted, and delayed bonding prestressed tendon are embedded with along longitudinal direction in the box beam ontology, in the box beam ontology
End is in the top plate and bottom plate of same sectional position and web is respectively corresponded with top plate preformed hole, bottom plate preformed hole and web
Preformed hole, interting between the top plate preformed hole and bottom plate preformed hole has vertical reinforcement, the two web preformed holes in left and right
Between intert have transverse steel, in the box beam body end be equipped with the inner side template that part is fixedly connected is bolted
And outboard template, integrally formed end bulkheads are poured between inner side template and outboard template.
Preferably, the delayed bonding prestressed tendon is embedded in bottom plate and web.
The delayed bonding prestressed tendon setting being preferably located in web erects that curved peace is curved, and the slow cohesion in bottom plate is pre-
Stress rib is not provided with erecting curved peace curved.
Preferably, the top plate and bottom plate and web are being located at the increase of box beam body end position thickness.
Preferably, it is embedded with the limit structure for fixing inner side template position respectively in the top plate and bottom plate and web
Part.
Preferably, pouring and forming the material of end bulkheads is normal concrete.
Preferably, the top plate outer ledge of the box beam ontology is equipped with longitudinal notch, leads between the adjacent box beam ontology
Cast-in-place ultra-high performance concrete is crossed to form longitudinal seam and be connected with each other.
Preferably, the top plate outer ledge is embedded with outwardly directed connection reinforcing bar, the top of the adjacent box beam ontology
The connection reinforcing bar of plate mutually staggers.
Preferably, the plate outer side edge bottom extends downwardly thickening, and the connection reinforcing bar is embedded in top plate outer side edges
Edge bottom and the pre-buried part bending for protruding into top plate.
The utility model has the advantages that
(1) Thin-walled Box Girder that box beam ontology is made of UHPC (ultra-high performance concrete) material, saves material, beam subtracts again
It is light by about 40%, it can effectively reduce deck-molding, be very suitable to limit for height or landscape requirement Urban Bridge；
(2) in box beam ontology pre-buried minor diameter delayed bonding prestressed tendon, reduce box beam inner wall thickness, further save
Material utilization amount avoids the corrosion of steel beam and replacement problem of external prestressing technique used by traditional UHPC box beam, significantly
The maintenance cost during operation is reduced, while delayed bonding prestressed tendon uses single tendon stretch, and exempts from mud jacking after tensioning, avoids
The use of large-scale tensioning equipment, simplifies construction process, ensure that architecture quality, is retarded adhesive prestressed technology in bridge field
Apply for the first time；
(3) longitudinal notch is arranged in the ceiling edge of box beam ontology, connects adjacent box beam ontology using longitudinal usually seam,
Outer diaphragm plate is eliminated, seam quantity is few, greatly reduces live seam and pours and curing time, facilitates assembled in situ and apply
Work.
(4) it is longitudinally not provided with regular reinforcement in beam body, avoids conflicting for internal delayed bonding prestressed tendon and regular reinforcement,
Reset time is shortened, is more suitable for bridge industrialized production.
Detailed description of the invention
The utility model is described further with reference to the accompanying drawings and examples；
Fig. 1 is the standard cross-section schematic diagram of adjacent box beam ontology connection in the utility model embodiment；
Fig. 2 is the span centre transverse sectional view of box beam ontology in the utility model embodiment；
Fig. 3 is the end cross schematic cross-section of box beam ontology in the utility model embodiment；
Fig. 4 is the end longitudinal cross-section schematic diagram of box beam ontology in the utility model embodiment；
Fig. 5 is the schematic cross-section of longitudinal seam connection in the utility model embodiment
Fig. 6 is the schematic cross-section that longitudinal seam uses connection reinforcing bar in the utility model embodiment；
Fig. 7 is the floor map that longitudinal seam uses connection reinforcing bar in the utility model embodiment.
Specific embodiment
Referring to Figure 1 to Figure 7, the utility model UHPC small box girder structure, including multiple adjacent box beam ontologies 10, box beam sheet
Body 10 can also be used and ultra-high performance concrete (UHPC, Ultra- by the prefabricated formation of ultra-high performance concrete, box beam ontology 10
High Performance Concrete) similar material, such as CRC, DSP, FRHPC, HPFRCC, RPC, STC, UHPFRC
High performance cement-based composites, box beam ontology 10 is by top plate 11, bottom plate 12, web 13, span centre partition 14 and end bulkheads 15
Constitute, top plate 11, bottom plate 12, web 13 thickness change along longitudinal direction, i.e., top plate 11, bottom plate 12 and web 13 be located at box beam
The position thickness of 10 end of ontology is larger, other part thickness are relatively small.Box beam ontology is by UHPC (ultra-high performance concrete)
The Thin-walled Box Girder that material is constituted, relative to traditional box beam, more saving material, beam alleviates about 40% again, can effectively reduce beam
Height has been very suitable to limit for height or landscape requirement Urban Bridge.
In order to improve bridge span, the delayed bonding prestressed tendon 16 of minor diameter is embedded in box beam ontology 10 along longitudinal direction, is delayed
Binding prestress reinforcement 16 is only embedded in bottom plate 12, in web 13.The delayed bonding prestressed tendon 16 being preferably located in web 13
Setting erects that curved peace is curved, and the delayed bonding prestressed tendon 16 in bottom plate 12 is not provided with erecting curved peace curved.Using the slow of minor diameter
Binding prestress reinforcement 16 can reduce box beam inner wall thickness, further save material utilization amount, avoid traditional UHPC box beam
The steel beam of used external prestressing technique corrodes and replacement problem, and the maintenance cost during operation is greatly reduced.
Box beam ontology 10 is to first pass through inner template and the prefabricated top plate 11 of exterior sheathing, bottom plate 12, web 13 and span centre partition 14,
Go out in the end position of box beam ontology 10, it is pre- that top plate preformed hole 111, bottom plate is respectively set on top plate 11, bottom plate 12, web 13
It boxes out 121 and web preformed hole 131, meanwhile, it is embedded with limit component 17 respectively on top plate 11, bottom plate 12 and web 13, limits
Position component 17 selects screw-thread steel, top plate preformed hole 111 and bottom plate towards span centre direction and each preformed hole interval 3cm, limit component 17
Interting between preformed hole 121 has vertical reinforcement 20, and interting between the two web preformed holes 131 in left and right has transverse steel 30,
Inner side template 40 and outboard template 50 are respectively provided in vertical reinforcement 20 and 30 front and rear sides of transverse steel, inner side template 40 and outer
Side template 50 is bolted part and fixes, and specifically, connection bolt 21 is welded in inner side template 40, outboard template 50 has
Connection through-hole corresponding with connection bolt 21, connection bolt 21 passes through connection through-hole, and is threadedly coupled two on connection bolt 21
A attaching nut 22, two attaching nuts 22 grip outboard template 50, by adjusting the position of two attaching nuts 22,
The spacing distance of outboard template 50 Yu inner side template 40 can be adjusted flexibly, supported and connect with limit component 17 by inner side template 40
Touching, to quickly and easily fix the position of outboard template 50 with inner side template 40, by the cast-in-place UHPC of top plate preformed hole 111,
End bulkheads 15 are integrally permanently formed with inner side template, outboard template.
Wherein, in order to reduce UHPC material utilization amount, cast-in-place UHPC material is readily modified as pouring normal concrete, at this point, outside
Side template 50 and the spacing distance of inner side template 40 increase.
It is that one is connected to form by longitudinal seam 60 between adjacent box beam ontology 10, specifically, each box beam ontology 10
11 outer ledge bottom of top plate extend downwardly thickening, it is vertical to improve and in centre setting longitudinal notch 112 with Transfer of Shear
To 60 transmission force property of seam, when box beam ontology 10 is prefabricated, 11 outer ledge of top plate is embedded with outwardly directed connection reinforcing bar 113,
The length that connection reinforcing bar 113 is embedded to top plate 11 should be able to meet the anchorage length of reinforcing bar, the company of the top plate 11 of adjacent box beam ontology 10
It connects reinforcing bar 113 to be staggeredly arranged, be filled by cast-in-place UHPC material to realize that adjacent box beam ontology 10 is connected with each other.
Preferably, the pre-buried part bending for protruding into top plate 11 of connection reinforcing bar 113, is added with adapting to the lateral part of top plate 11
Thickness construction.
The embodiments of the present invention is explained in detail above in conjunction with attached drawing, but the utility model is not limited to
State embodiment, within the scope of knowledge possessed by those of ordinary skill in the art, can also do not depart from it is practical
Various changes can be made under the premise of novel objective.
Claims (9)
1. a kind of UHPC small box girder structure, it is characterised in that: including multiple adjacent box beam ontologies, the box beam ontology is by superelevation
The prefabricated formation of performance concrete, the box beam ontology are made of top plate and bottom plate, web, span centre partition and end bulkheads, the case
Be embedded with delayed bonding prestressed tendon along longitudinal direction in beam ontology, the box beam body end be in same sectional position top plate,
Bottom plate and web are respectively corresponded with top plate preformed hole, bottom plate preformed hole and web preformed hole, the top plate preformed hole and bottom plate
Interting between preformed hole has vertical reinforcement, and interting between the two web preformed holes in left and right has transverse steel, described
It is equipped in box beam body end and the inner side template and outboard template that part is fixedly connected is bolted, in inner side template and outside
Integrally formed end bulkheads are poured between template.
2. UHPC small box girder structure according to claim 1, it is characterised in that: the delayed bonding prestressed tendon is embedded in bottom
In plate and web.
3. UHPC small box girder structure according to claim 2, it is characterised in that: the delayed bonding prestressed tendon in web
It is curved that curved peace is erected in setting, and the delayed bonding prestressed tendon in bottom plate is not provided with erecting curved peace curved.
4. UHPC small box girder structure according to any one of claim 1-3, it is characterised in that: the top plate and bottom plate and
Web is being located at the increase of box beam body end position thickness.
5. UHPC small box girder structure according to claim 1, it is characterised in that: divide in the top plate and bottom plate and web
It is not embedded with the limit component for fixing inner side template position.
6. UHPC small box girder structure according to claim 1, it is characterised in that: it is general for pouring and forming the material of end bulkheads
Logical concrete.
7. UHPC small box girder structure according to claim 1, it is characterised in that: the top plate outer ledge of the box beam ontology
Equipped with longitudinal notch, longitudinal seam is formed by cast-in-place ultra-high performance concrete between the adjacent box beam ontology and is mutually interconnected
It connects.
8. UHPC small box girder structure according to claim 7, it is characterised in that: the top plate outer ledge is embedded with outward
The connection reinforcing bar of the connection reinforcing bar of stretching, the top plate of the adjacent box beam ontology mutually staggers.
9. UHPC small box girder structure according to claim 8, it is characterised in that: the plate outer side edge bottom is to downward
Thickening is stretched, the connection reinforcing bar is embedded in top plate outer ledge bottom and the pre-buried part bending for protruding into top plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820882162.6U CN208440963U (en) | 2018-06-07 | 2018-06-07 | A kind of UHPC small box girder structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820882162.6U CN208440963U (en) | 2018-06-07 | 2018-06-07 | A kind of UHPC small box girder structure |
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| Publication Number | Publication Date |
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| CN208440963U true CN208440963U (en) | 2019-01-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374014A (en) * | 2019-08-09 | 2019-10-25 | 黄河勘测规划设计研究院有限公司 | Big span continuous beam UHPC column construction method |
-
2018
- 2018-06-07 CN CN201820882162.6U patent/CN208440963U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374014A (en) * | 2019-08-09 | 2019-10-25 | 黄河勘测规划设计研究院有限公司 | Big span continuous beam UHPC column construction method |
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