CN107151988A - Trough girder bridge deck structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced - Google Patents
Trough girder bridge deck structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced Download PDFInfo
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- CN107151988A CN107151988A CN201710517633.3A CN201710517633A CN107151988A CN 107151988 A CN107151988 A CN 107151988A CN 201710517633 A CN201710517633 A CN 201710517633A CN 107151988 A CN107151988 A CN 107151988A
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- high performance
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Classifications
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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
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/08—Damp-proof or other insulating layers; Drainage arrangements or devices ; Bridge deck surfacings
- E01D19/083—Waterproofing of bridge decks; Other insulations for bridges, e.g. thermal ; Bridge deck surfacings
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The present invention relates to the trough girder bridge deck structure that a kind of ultra-high performance concrete is reinforced, including trough girder, first formula floorings and the ultra-high performance concrete back-up coat positioned at first formula floorings bottom；Ultra-high performance concrete back-up coat includes the reinforcement constitution being connected with trough girder and the ultra-high performance concrete being cast in reinforcement constitution layer；Respective handling is carried out the invention further relates to the reinforcement means of above-mentioned trough girder bridge deck structure, including to the bottom of first formula floorings；Embedded implantation reinforcing bar and reinforcement placing net on trough girder；Formwork is carried out using template, ultra-high performance concrete is irrigated；Normal temperature maintenance, form removal are carried out to ultra-high performance concrete.Execution conditions of the present invention are simple, speed of application is fast, reduce interference and influence of traditional Scheme for Bridge Strengthening by Using on traffic, greatly improve the ultimate bearing capacity of former trough girder, with preferable economy, and due to ultra-high performance concrete high-durability in itself and normal temperature maintenance characteristic, make its service life longer and reduce maintenance cost.
Description
Technical field
The present invention relates to Technology Bridge Strengthening field, more particularly to the groove profile beam bridge floor that a kind of ultra-high performance concrete is reinforced
Structure and its reinforcement means.
Background technology
Groove profile beam bridge is as widely used type of bridge in a kind of highway system, due to unreasonable in design, and applies
Working medium amount is difficult to ensure that so that it roof and floor crack easily occurs, the disease such as steel bar corrosion.That is set up between trough girder is prefabricated
First formula plate, it is difficult to ensure overall stress, therefore easily there is crack or destruction of dropping in first formula plate.
The reinforcement means used at present mainly has armored concrete to be molded into method for strengthening, sticking steel plate or steel reinforcing method, patch fibre
Tie up material reinforced method etc..And common armored concrete is molded into effect in method for strengthening and preferably uses ultra-high performance concrete,
But current ultra-high performance concrete is both needed to high temperature steam curing, this can make its too high shrinkage and creep just be tried one's best in the maintenance stage
Eliminate, it is ensured that big crack, but its high temperature will not be produced in use of the ultra-high performance concrete after because of shrinkage and creep
The steam curing time is long, constructs cumbersome, and its curing time is not less than 48 hours.Above-mentioned reinforcement means is required to close traffic, right
The structure that traffic is caused after great inconvenience, and reinforcing needs good maintenance, and durability is difficult to ensure that.
The content of the invention
It is an object of the invention to overcome defect of the prior art, there is provided the groove profile that a kind of ultra-high performance concrete is reinforced
Beam bridge floor structure and its reinforcement means, its use excellent performance only need normal temperature conserve ultra-high performance concrete below bridge floor
Maintenance and reinforcement is carried out, without close traffic, the obstruction to traffic is reduced, corresponding operating expenses is reduced, strengthens durability.
To achieve the above object, the present invention is adopted the following technical scheme that：
The invention provides the groove profile beam bridge construction that a kind of ultra-high performance concrete is reinforced, including trough girder, it is set up in groove
First formula floorings between type beam and the ultra-high performance concrete back-up coat positioned at first formula floorings bottom；Wherein, it is described super
High performance concrete back-up coat includes the reinforcement constitution being connected with trough girder and the very-high performance coagulation being cast in reinforcement constitution
Soil layer.
The ultra-high performance concrete that the present invention is used is a kind of high intensity, the material of high ductility, its use full fine aggregate, compared with
The serial of methods such as the low ratio of mud, addition water reducer form the cement slurry of densification, and this causes the corrosive goodses such as water, chlorion
Matter is difficult to enter inside ultra-high performance concrete, so that ultra-high performance concrete has good durability.Very-high performance
Concrete also has good workability, with the functions such as Self-leveling, self-compaction, ultra-high performance concrete of the present invention
Conserved using normal temperature, curing time is only 3~5 hours.
In order to further optimize above-mentioned technical proposal, the technical measures that the present invention is taken also include：
Preferably, the side view of the ultra-high performance concrete back-up coat is π types thick on both sides and thin in the middle, and this shape is more
Be conducive to its consolidation effect.
Preferably, the reinforcement constitution includes implantation reinforcing bar and bar-mat reinforcement；The bar-mat reinforcement is at least one layer of transverse steel
The network structure intersected to form with least one layer of longitudinal reinforcement, the transverse steel is located at the top of longitudinal reinforcement.
Preferably, one end of the implantation reinforcing bar is laterally embedded into trough girder, and the other end is inclined upwardly for reinforcement placing net,
It is parallel between adjacent implantation reinforcing bar or with certain angle (5~10 °).
Preferably, there is 10~20 ° of angle, this is more beneficial for bar-mat reinforcement between the implantation reinforcing bar and transverse steel
Laying and the uniform force for ensureing reinforcing bar.
Preferably, the implantation reinforcing bar, transverse steel and longitudinal reinforcement are grade III steel, and diameter is 10mm, between laying
Away from being 150mm.
Be preferably located at the longitudinal reinforcement at two ends and the implantation reinforcement welding, positioned at middle longitudinal reinforcement with it is described
Transverse steel uses thin muscle colligation, and the transverse steel is with implantation reinforcement welding or using thin muscle colligation.
Preferably, the trough girder bridge deck structure also includes being set up in the second formula floorings above trough girder and being layed in
Concrete pave-load layer and bitumen layer above the first formula floorings and second formula floorings.
Preferably, the thickness of the first formula floorings and second formula floorings is 5~8cm, and the thickness of the concrete pave-load layer is 8
~10cm, the thickness of the bitumen layer is 5~8cm, and the thickness that the ultra-high performance concrete reinforces layer by layer is 4~6cm；It is more excellent
The thickness of selection of land, the first formula floorings and second formula floorings is 6cm, and the thickness of the concrete pave-load layer is 9cm, the bitumen layer
Thickness be 7cm, the thickness of the ultra-high performance concrete back-up coat is 5cm.
The present invention also provides a kind of reinforcement means of trough girder bridge deck structure as claimed in claim 1, it is characterised in that
Comprise the following steps：
Step 1) bottoms of first formula floorings is surface-treated and processing of rust removing is carried out to exposed reinforcing bar；
Step 2) implantation reinforcing bar is embedded on the trough girder of first formula floorings both sides and bar-mat reinforcement is set up using reinforcing bar is implanted into；
Step 3) formwork is carried out in the bottom of first formula floorings using template, and encapsulation process is carried out to template periphery；
Step 4) ultra-high performance concrete is poured into template, implantation reinforcing bar and bar-mat reinforcement are embedded to very-high performance coagulation
In native；
Step 5) normal temperature maintenance, form removal are carried out to ultra-high performance concrete.
Preferably, the step 1) in first formula floorings comprising the following steps that of being surface-treated of bottom：First to first
The former concrete layer of formula floorings bottom is surface-treated, and is removed first formula floorings surface failure of rock, the concrete loosened, is passed through
It is after surface treatment, chip, powder cleaning down is clean.
Preferably, the step 4) in ultra-high performance concrete is poured into template using concrete pump.
Preferably, the one kind of the template in steel form, plank sheathing, opened up respectively in the both sides of template perfusing hole and
Gas outlet.
The present invention lays one layer of ultra-high performance concrete by the first formula floorings bottom between trough girder, is split with closing
Seam, so as to ensure the overall stress of trough girder, strengthen the anti-bending strength in section, improve the bearing capacity of first formula floorings, makes each groove
First formula floorings between type beam occur without the destruction situation that comes off.
Compared with prior art, the invention has the advantages that：
(1) from structure stress, ultra-high performance concrete layer adds with the ultra-high performance concrete that reinforcement constitution is constituted
Gu layer can repair the crack of first formula floorings bottom between trough girder, first formula floorings come off between preventing trough girder, and can be simultaneously
Improve the bending bearing capacity of first formula floorings and trough girder.After reinforcing, total cross-section rigidity is improved, and improves floorings and groove profile
The stress level of beam.The intensity of ultra-high performance concrete superelevation and fine and close structure ensure that the integrity for repairing position, make it
Disease will not be produced again because of original inducement (such as chlorion is encroached on), it is ensured that the durability of structure.
(2) from workability, the ultra-high performance concrete used in the present invention is suitable for scene and applied without high-temperature steam curing
Work, without harsh execution conditions.Part or of short duration close traffic are only needed, the short time completes reinforcing process, reduced to traffic
Influence.Ultra-high performance concrete has a self-compacting ability, easy construction, and good with bridge deck pavement adhesive property, can be with original
Groove profile beam bridge one stress entirety of formation.
(3) in terms of structure durability, ultra-high performance concrete has high intensity, and its outstanding crack resistance, which ensure that, to be added
Fixing structure steel bar stress is all the time in protective layer, and steel bar stress will not be contacted with air, so as to improve bar-mat reinforcement resistance rust
The ability of erosion.The durability of ultra-high performance concrete is more than 20 times of normal concrete, can significantly improve trough girder after reinforcing
The durability of bridge, extends the service life of reinforcement bridge.
(4) from the point of view of economy, present invention ultra-high performance concrete used is without high-temperature steam curing, it is to avoid complicated plus
Gu the high cost that onsite application high-temperature steam curing is brought.Speed of application is very fast, on traffic substantially without influence, reduces traffic control
Expense.Managed after the completion of structural strengthening substantially without late maintaining, operation cost is reduced, with significant economy.
Brief description of the drawings
Fig. 1 is the sectional view for the trough girder bridge deck structure reinforced for the present invention-ultra-high performance concrete；
Fig. 2 is the enlarged drawing of the ultra-high performance concrete back-up coat shown in Fig. 1；
Fig. 3 is the top view of the reinforcement constitution shown in Fig. 2；
Reference in figure is：
1st, trough girder；2nd, first formula floorings；3rd, second formula floorings；4th, concrete pave-load layer；5th, bitumen layer；6th, very-high performance coagulation
Native back-up coat；7th, reinforcement constitution；8th, ultra-high performance concrete layer；71st, it is implanted into reinforcing bar；72nd, transverse steel；73rd, longitudinal reinforcement.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is further described.Following examples are only
For clearly illustrating technical scheme, and it can not be limited the scope of the invention with this.
Embodiment one
The present embodiment is the preparation process of ultra-high performance concrete of the present invention.
Every cubic metre of concrete is made up of the following raw material：Cement 800-1200kg, mineral admixture 50-200kg, thin bone
Expect 800-1200kg, steel fibre 78-300kg, water reducer (solid content) 3-15kg, defoamer 0.6-5kg, swelling agent 60-
120kg, water 105-250kg.
In a specific operation process, every cube of ultra-high performance concrete includes the following raw material and quality：Portland cement
765kg；Active SiO272kg；CaO48kg；SO322.5kg；Al2O37.5kg；Quartz sand 300kg；River sand 300kg；Slag
400kg；Steel fibre 128kg；Naphthalene series high-efficiency water-reducing agent 9kg；Organic silicon defoamer 2kg；Calcium oxide expansion agents 75kg；Water
200kg。
Wherein, length of steel fiber is 15-20mm, a diameter of 0.15-0.25mm, and quartz sand, river sand, the granularity of slag are small
In equal to 5mm.
Above-mentioned raw materials, which are well mixed, can obtain ultra-high performance concrete.
The ultra-high performance concrete prepared using said ratio has superhigh intensity, high ductility, high tenacity, good endurance etc.
Advantage, it uses normal temperature to conserve, effectively shortens curing time and maintenance cost, can significantly improve groove profile beam bridge after reinforcing
Durability, extend reinforcement bridge service life.
Embodiment two
The present embodiment is that the trough girder bridge deck structure that the ultra-high performance concrete stated is reinforced is prepared using embodiment one.
As shown in figure 1, the trough girder bridge deck structure that ultra-high performance concrete of the present invention is reinforced, including trough girder 1,
The first formula floorings 2 between trough girder 1 are set up in, the second formula floorings 3 of the top of trough girder 1 is set up in and is layed in the first
Formula floorings 2 and the concrete pave-load layer 4 and bitumen layer 5 of the top of second formula floorings 3, it is also included positioned at the bottom of first formula floorings 2
Ultra-high performance concrete back-up coat 6；The ultra-high performance concrete back-up coat 6 include the reinforcement constitution 7 that is connected with trough girder 1 and
The ultra-high performance concrete layer 8 in reinforcement constitution 7 is cast in, and the side view of the ultra-high performance concrete back-up coat 6 is
π types thick on both sides and thin in the middle are matched with the original structure with groove profile beam bridge, to improve the bearing capacity of the groove profile beam bridge after reinforcing.
In this embodiment, the thickness of the first formula floorings 2 and second formula floorings 3 is 6cm, the concrete pave-load layer 4
Thickness is 9cm, and the thickness of the bitumen layer 5 is 7cm, and the thickness of the ultra-high performance concrete back-up coat 6 is 5cm.Meeting
In the case of bridge floor design specification and force request, the thickness of above layers also can be suitably adjusted.
As shown in Figures 2 and 3, reinforcement constitution 7 includes implantation reinforcing bar 71 and bar-mat reinforcement；One end of the implantation reinforcing bar 71 is horizontal
To embedded trough girder 1, the other end is inclined upwardly for reinforcement placing net, is parallel or with one between adjacent implantation steel 71
Fixed angle；The bar-mat reinforcement is the netted knot that at least one layer of transverse steel 72 and at least one layer of longitudinal reinforcement 73 are intersected to form
Structure, the transverse steel 72 is located at the top of longitudinal reinforcement 71, can adjust laterally according to actual bridge deck structure and stressing conditions
The number of plies of reinforcing bar and longitudinal reinforcement；There is 10~20 ° of angle in favor of steel between the implantation reinforcing bar 71 and transverse steel 72
The laying of muscle net and the stress equalization of steel bar stress.
The implantation reinforcing bar 71, transverse steel 72 and longitudinal reinforcement 73 are grade III steel, and diameter is 10mm, lays spacing
It is 150mm, can also uses the reinforcing bar of other specifications；Longitudinal reinforcement 73 positioned at both sides is welded with implantation reinforcing bar 71, in being located at
Between longitudinal reinforcement 73 and transverse steel 71 use thin muscle colligation, transverse steel 72 is welded with being implanted into reinforcing bar 72 or tied up using thin muscle
Prick.
Using the reinforcement constitution of this structure, it is ensured that reinforcing bar direction steel bar stress in length and breadth it is straight, steel grid size is equal
Even, preferably, rigidity is larger, is unlikely to deform, and is pouring ultra-high performance concrete for the reinforcement constitution globality of welding or bundling shaping
In work progress, even if reinforcement constitution is not easy to cause to locally bend deformation and off normal by the effect of external force, shaping is poured
Ultra-high performance concrete reinforcing thickness is more uniform, improves its cracking resistance, and improves first formula floorings and trough girder simultaneously
Bending bearing capacity.
Embodiment three
The present embodiment is the reinforcement means for the trough girder bridge deck structure that the ultra-high performance concrete described in embodiment two is reinforced,
It is comprised the following steps that：First the former concrete layer of first formula floorings bottom is surface-treated during construction, first formula bridge floor is removed
The concrete that plate surface is broken, loosen, after surface treatment, chip, powder cleaning down is clean, the former coagulation removed
The thickness of the layer is about 2-5cm；The reinforcing bar exposed to primitive nail formula floorings carries out processing of rust removing again, first with wire brush, emery disc, fiber crops
Bagging etc. dabs derusting, carries out dissolving derusting with reinforcing bar rust remover afterwards；Then on the trough girder of first formula floorings both sides laterally
Embedded implantation reinforcing bar, depth of the implantation reinforcing bar in trough girder is be implanted into bar diameter 18 times or 20 times；Using being implanted into reinforcing bar
Reinforcement placing net, and to being welded between each reinforcing bar or fine steel rib colligation；Then using steel form in first formula plate bottom formwork,
And encapsulation process is carried out to steel form periphery, the side view of steel form formwork is π types thick on both sides and thin in the middle；Finally using mixed
Ultra-high performance concrete is poured into steel form by solidifying soil pump, and implantation reinforcing bar and bar-mat reinforcement are embedded in ultra-high performance concrete,
The both sides of template open up perfusing hole and gas outlet, and perfusing hole is used for concrete perfusion, and gas outlet is used for the air for discharging template, when
Venthole shows to have irrigated full ultra-high performance concrete in the cavity that template is constituted when being flowed out by ultra-high performance concrete, this
When stop concrete pump；Finally carry out normal temperature to ultra-high performance concrete to conserve 3~5 hours, form removal.
Reinforcement means of the present invention, it is simple to operate, using concrete pump automatic filling ultra-high performance concrete, and lead to
Cross gas outlet to judge whether to fill, effectively save the reinforcing operating time of groove profile beam bridge；Reinforced simultaneously using the above method
The steel bar stress of structure is all the time in protective layer, and steel bar stress will not be contacted with air, so as to improve bar-mat reinforcement resistance rust
The ability of erosion.
From above-described embodiment, the present invention has the characteristics of execution conditions are simple, speed of application is fast, reduces traditional axle
Interference and influence of the beam Scheme of Strengthening on traffic, with preferable economy, and the height due to ultra-high performance concrete in itself
Durability and normal temperature maintenance characteristic, its service life is also than general reinforcement means more preferably, and effectively reduce maintenance cost.
The specific embodiment of the present invention is described in detail above, but it is only used as example, and the present invention is not intended to limit
In particular embodiments described above.To those skilled in the art, it is any to the equivalent modifications that carry out of the present invention and to replace
In generation, is also all among scope of the invention.Therefore, the equalization made without departing from the spirit and scope of the invention is converted and repaiied
Change, all should be contained within the scope of the invention.
Claims (9)
1. the trough girder bridge deck structure that a kind of ultra-high performance concrete is reinforced, it is characterised in that including trough girder (1), be set up in
First formula floorings (2) between trough girder (1) and the ultra-high performance concrete back-up coat positioned at first formula floorings (2) bottom
(6)；Wherein, the ultra-high performance concrete back-up coat (6) includes the reinforcement constitution (7) being connected with trough girder (1) and is cast in
Ultra-high performance concrete layer (8) in reinforcement constitution (7).
2. trough girder bridge deck structure according to claim 1, it is characterised in that the reinforcement constitution (7) includes implantation steel
Muscle (71) and bar-mat reinforcement；The bar-mat reinforcement is that at least one layer of transverse steel (72) and at least one layer of longitudinal reinforcement (73) intersect to form
Network structure, the transverse steel (72) be located at longitudinal reinforcement (73) top.
3. trough girder bridge deck structure according to claim 2, it is characterised in that one end of the implantation reinforcing bar (71) is horizontal
Embedded trough girder (1), the other end is inclined upwardly for reinforcement placing net, is parallel or tool between adjacent implantation reinforcing bar (71)
There is certain angle.
4. trough girder bridge deck structure according to claim 2, it is characterised in that the implantation reinforcing bar (71) and transverse steel
(72) there is 10~20 ° of angle between.
5. trough girder bridge deck structure according to claim 1, it is characterised in that the groove profile beam bridge structure also includes setting up
Second formula floorings (3) above trough girder (1) and it is layed in above the first formula floorings (2) and second formula floorings (3)
Concrete mat formation (4) layer by layer and bitumen layer (5).
6. trough girder bridge deck structure according to claim 1 or 5, it is characterised in that the first formula floorings (2) and second formula
The thickness of floorings (3) is 5~8cm, and the mat formation thickness of (4) layer by layer of the concrete is 8~10cm, the thickness of the bitumen layer (5)
For 5~8cm, the thickness of the ultra-high performance concrete back-up coat (6) is 4~6cm.
7. a kind of reinforcement means of trough girder bridge deck structure as claimed in claim 1, it is characterised in that comprise the following steps：
Step 1) bottoms of first formula floorings is surface-treated and processing of rust removing is carried out to exposed reinforcing bar；
Step 2) implantation reinforcing bar is embedded on the trough girder of first formula floorings both sides and bar-mat reinforcement is set up using reinforcing bar is implanted into；
Step 3) formwork is carried out in the bottom of first formula floorings using template, and encapsulation process is carried out to template periphery；
Step 4) ultra-high performance concrete is poured into template, implantation reinforcing bar and bar-mat reinforcement are embedded to ultra-high performance concrete
It is interior；
Step 5) normal temperature maintenance, form removal are carried out to ultra-high performance concrete.
8. reinforcement means according to claim 7, it is characterised in that the step 4) in using concrete pump by superelevation
Energy filling concrete enters in template.
9. reinforcement means according to claim 7, it is characterised in that the template in steel form, plank sheathing one
Kind, perfusing hole and gas outlet are opened up respectively in the both sides of template.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710517633.3A CN107151988A (en) | 2017-06-29 | 2017-06-29 | Trough girder bridge deck structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710517633.3A CN107151988A (en) | 2017-06-29 | 2017-06-29 | Trough girder bridge deck structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced |
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| Publication Number | Publication Date |
|---|---|
| CN107151988A true CN107151988A (en) | 2017-09-12 |
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ID=59796434
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| CN201710517633.3A Pending CN107151988A (en) | 2017-06-29 | 2017-06-29 | Trough girder bridge deck structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114293479A (en) * | 2020-10-08 | 2022-04-08 | 四川苏博特新材料有限公司 | Concrete overpass bridge protection device and anti-collision reinforcement method thereof |
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Effective date of registration: 20181101 Address after: 315000 No. 150 (2-1-003), Ji Po Road, Ji Shi Gang Town, Haishu District, Ningbo, Zhejiang. Applicant after: Zhejiang Hongzhi Tai Nike new Mstar Technology Ltd. Address before: 201700 48 Lane 628, Zhang Long Tang Road, Qingpu Town, Shanghai Applicant before: SHANGHAI ROYANG INNOVATIVE MATERIAL TECHNOLOGIES Co.,Ltd. |
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