CN107090783A - Hollow Slab Beam Bridge structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced - Google Patents
Hollow Slab Beam Bridge structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced Download PDFInfo
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- CN107090783A CN107090783A CN201710515423.0A CN201710515423A CN107090783A CN 107090783 A CN107090783 A CN 107090783A CN 201710515423 A CN201710515423 A CN 201710515423A CN 107090783 A CN107090783 A CN 107090783A
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- 239000011374 ultra-high-performance concrete Substances 0.000 title claims abstract description 54
- 239000004567 concrete Substances 0.000 claims abstract description 50
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 38
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 13
- 238000012423 maintenance Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 238000002513 implantation Methods 0.000 claims description 23
- 238000005452 bending Methods 0.000 claims description 4
- 239000002689 soil Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 9
- 238000005728 strengthening Methods 0.000 abstract description 4
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- 238000000034 method Methods 0.000 description 6
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- 238000003466 welding Methods 0.000 description 2
- 241000370738 Chlorion Species 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical class [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
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- 229910052906 cristobalite Inorganic materials 0.000 description 1
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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
Abstract
The present invention relates to the Hollow Slab Beam Bridge construction that a kind of ultra-high performance concrete is reinforced, including simultaneously, row hinge stitches the hollow slab girder of connection and its bridge deck pavement of top, and bridge deck pavement includes normal concrete layer, ultra-high performance concrete back-up coat and asphalt concrete layer；The reinforcement constitution being connected with normal concrete layer is wherein set inside ultra-high performance concrete back-up coat；The invention further relates to the reinforcement means of above-mentioned Hollow Slab Beam Bridge construction, including step：Cut protobitumen concrete layer；It is embedded in normal concrete layer to be implanted into reinforcing bar and lay bar-mat reinforcement；Thin layer ultra-high performance concrete and normal temperature maintenance are poured, pave asphalt concrete layer.Compared with prior art, the present invention has the characteristics of execution conditions are simple, speed of application is fast, reduce interference and influence of traditional Scheme for Bridge Strengthening by Using on traffic, 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 effectively reduce maintenance cost.
Description
Technical field
The present invention relates to Technology Bridge Strengthening field, more particularly to the Hollow Slab Beam Bridge that a kind of ultra-high performance concrete is reinforced
Structure and its reinforcement means.
Background technology
Hollow Slab Beam Bridge is as widely used type of bridge in a kind of highway system, due to unreasonable in design, and
Construction quality is difficult to ensure that so that it hinge seam destruction between each plate easily occurs, and lateral load transmission failure, monolithic plate is born
The situation of larger vehicular load.
The U of Chinese patent CN 204475177 disclose a kind of bridge floor reinforcement pave-load layer of lightweight concrete, and it uses lightweight
Concrete layer replaces original concrete bridge deck pavement layer in hollow hinged slab bridge, in the upper surface of lightweight concrete layer and
Bar-mat reinforcement is arranged with lower surface, the hollow lateral stiffness and durability for being hinged plate girder bridge is improved, but this is for having built up
Only need need to cut whole concrete bridge deck pavements layers for the Hollow Slab Beam Bridge of repairing and reinforcement, especially need to cut hard
Normal concrete layer, then repaves dress new bridge surface layer, its repair time is longer, it is necessary to which close traffic, is caused greatly to traffic
It is constant, and to hinge seam consolidation effect it is general.
In order to obtain more preferable consolidation effect, ultra-high performance concrete has been developed, but current very-high performance
Concrete is both needed to high temperature steam curing, and this can be such that its too high shrinkage and creep is just eliminated as far as possible in the maintenance stage, it is ensured that superelevation
Big crack will not be produced in use of the performance concrete after because of shrinkage and creep, but its high temperature steam curing time is long,
Construction is cumbersome, and its curing time is not less than 48 hours, also needs close traffic, great inconvenience is caused to traffic, and reinforce it
Structure afterwards 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 a kind of ultra-high performance concrete reinforce it is hollow
Plate girder bridge structure and its reinforcement means, this method need not cut normal concrete bridge deck pavement, it is only necessary to cut the drip on road surface
Blue or green concrete pavement layer, then lays the thin layer very-high performance coagulation ultra-high performance concrete for only needing normal temperature to conserve of excellent performance
Pave-load layer, reduces construction procedure, it is not necessary to cuts hard concrete pavement layer, shortens the engineering time, the shadow to traffic
Ring and reduce as far as possible, while reaching the consolidation effect of the overall stress of full-bridge.
To achieve the above object, the present invention is adopted the following technical scheme that：
The invention provides the Hollow Slab Beam Bridge construction that a kind of ultra-high performance concrete is reinforced, including hinge seam is used to connect side by side
The hollow slab girder connect and the bridge deck pavement being layed in above hollow slab girder, the bridge deck pavement are followed successively by general from the bottom to top
Logical concrete layer, ultra-high performance concrete back-up coat and asphalt concrete layer；Wherein, in the ultra-high performance concrete back-up coat
Portion sets the reinforcement constitution being connected with normal concrete 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, curing time is only 3~5 hours, or even need to only conserved 2 hours using normal temperature.
In order to further optimize above-mentioned technical proposal, the technical measures that the present invention is taken also include：
Preferably, the reinforcement constitution includes implantation reinforcing bar and bar-mat reinforcement；The bar-mat reinforcement includes at least one layer of horizontal
Reinforcing bar and at least one layer of longitudinal reinforcement, the transverse steel and longitudinal reinforcement are located at institute with 90 ° of arranged crosswises, the transverse steel
State the top of longitudinal reinforcement (63)；It is highly preferred that the bar-mat reinforcement includes one layer of transverse steel and one layer of longitudinal reinforcement.
Preferably, the implantation reinforcing bar is the reinforcing bar of 90 ° of bendings.
Preferably, one end of the implantation reinforcing bar is vertically embedded in the normal concrete layer and perpendicular to the reinforcing bar
Net, the other end parallel to the transverse steel and with the transverse steel in the same plane.
Preferably, the implantation reinforcing bar is organized in pairs, and is located at the both sides of the hinge seam respectively.
Preferably, the thickness of the normal concrete layer is 6~10cm, the thickness of the ultra-high performance concrete back-up coat
For 3~5cm, the thickness of the asphalt concrete layer is 3~5cm；It is highly preferred that the thickness of the normal concrete layer is 8cm,
The thickness of the ultra-high performance concrete back-up coat is 4cm, and the thickness of the asphalt concrete layer is 4cm.
Preferably, the implantation reinforcing bar is grade III steel, a diameter of 10mm of the implantation reinforcing bar, its paving in horizontal direction
If spacing is 300mm, it is 200mm in the laying spacing of longitudinal direction.
Preferably, the transverse steel and longitudinal reinforcement are grade III steel, a diameter of 12mm of the transverse steel, laying
Spacing is 100mm；A diameter of 10mm of the longitudinal reinforcement, laying spacing is 100mm.
The present invention also provides a kind of reinforcement means of Hollow Slab Beam Bridge structure as claimed in claim 1, including following step
Suddenly：
Step 1) the protobitumen concrete layer on Hollow Slab Beam Bridge surface is cut, expose normal concrete layer；
Step 2) along hinge seam both sides, embedded implantation reinforcing bar, bar-mat reinforcement is laid after cleaning on normal concrete layer；
Step 3) pour thin layer ultra-high performance concrete on normal concrete layer, and will implantation reinforcing bar and bar-mat reinforcement bury to
Wherein, ultra-high performance concrete back-up coat is formed；
Step 4) pour and finish after, normal temperature maintenance is carried out to ultra-high performance concrete back-up coat, then in thin layer superelevation
Can concrete surface pave asphalt concrete layer.
Preferably, the step 2) in, the cleanup step not specially treated such as including dabbing.
Preferably, the step 4) in, the time of normal temperature maintenance is 2 hours.
The invention provides a kind of method of repairing and reinforcement hollow slab girder, quick reparation Hollow Slab Beam Bridge has been reached, has been reduced
To the obstruction of traffic.The present invention lays layer of material-ultra-high performance concrete on Hollow Slab Beam Bridge pave-load layer, so as to protect
Demonstrate,prove the overall stress of hollow slab girder, occur without the independent stress destruction situation of each plate-girder；Pass through ultra-high performance concrete and common coagulation
The mode that local soil type closes destroys caused to ensure that hinge common in the holistic resistant behavior of each cored slab, reparation Hollow Slab Beam Bridge is stitched
Single slab bearing problem.
Compared with prior art, the invention has the advantages that：
(1) from structure stress, the superhigh intensity of ultra-high performance concrete ensure that under vehicular load, each hollow slab girder
Between can effectively Transfer of Shear, it is to avoid there is the situation of single slab bearing in hollow slab girder, so as to keep the overall stress of full-bridge, surpasses
High performance concrete back-up coat will not ftracture；By being implanted into the setting of reinforcing bar and bar-mat reinforcement, normal concrete pave-load layer is layed in
The ultra-high performance concrete back-up coat on top, can form entirety with former bridge floor, be tightly combined, cannot come off, it is ensured that driving
Comfortableness.
(2) from workability, present invention ultra-high performance concrete used is suitable for scene and applied without high-temperature steam curing
Work, without harsh execution conditions, only needs part or of short duration close traffic, 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
Bridge one stress entirety of formation.
(3) from the aspect of structure durability, ultra-high performance concrete has high intensity, and its outstanding crack resistance ensures
Ruggedized construction steel bar stress is all the time in protective layer, and steel bar stress will not be contacted with air, supported so as to improve bar-mat reinforcement
Corrosion protection ability；The durability of ultra-high performance concrete is more than 20 times of normal concrete, can be significantly improved empty after reinforcing
The durability of core beam bridge floor, extends the service life of Hollow Slab Beam Bridge.
(4) from the point of view of economy, the ultra-high performance concrete used in the present invention is without high-temperature steam curing, it is to avoid complicated
Reinforce 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 pipe
Expense processed.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 Hollow Slab Beam Bridge structure reinforced for the present invention-ultra-high performance concrete；
Fig. 2 is the top view of the reinforcement constitution shown in Fig. 1；
Reference in figure is：
1st, hinge seam；2nd, hollow slab girder；3rd, normal concrete layer；4th, ultra-high performance concrete back-up coat；5th, bituminous concrete
Layer；6th, reinforcement constitution；61st, it is implanted into reinforcing bar；62nd, transverse steel；63rd, 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：Strength grade
More than 42.5 portland cement 950kg；Active SiO2 100kg；CaO 38kg；SO3 44.4kg；Al2O3 7.6kg；River sand
500kg；Limestone aggregate 200kg；Slag fine aggregate 400kg；Steel fibre 175kg；Polycarboxylate water-reducer 8kg；Non-ionic surface
Activating agent 3.5kg；Magnesia class swelling agent 75kg；Water 200kg.
Wherein, length of steel fiber is 15-20mm, a diameter of 0.15-0.25mm, river sand, limestone aggregate, slag fine aggregate
Granularity be respectively less than be 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 hollow slab girder after reinforcing
The durability of bridge, extends the service life of reinforcement bridge.
Embodiment two
The present embodiment is the Hollow Slab Beam Bridge structure reinforced using the ultra-high performance concrete described in embodiment one.
As shown in figure 1, the Hollow Slab Beam Bridge structure that ultra-high performance concrete of the present invention is reinforced, including including side by side
Using the connection of hinge seam 1 hollow slab girder 2 and be layed in the bridge deck pavement of the top of hollow slab girder 2, the bridge deck pavement by
Under supreme be followed successively by normal concrete layer 3, ultra-high performance concrete back-up coat 4 and asphalt concrete layer 5；Wherein, the superelevation
The inside of performance concrete back-up coat 4 sets the reinforcement constitution 6 being connected with normal concrete layer, to improve the hollow slab girder after reinforcing
The bearing capacity of bridge.
In this embodiment, the thickness of the normal concrete layer 3 is 8cm, the ultra-high performance concrete back-up coat 4
Thickness is 4cm, and the thickness of the asphalt concrete layer 5 is 4cm.In the case where meeting bridge floor design specification and force request,
Also the thickness of above layers can suitably be adjusted.
As depicted in figs. 1 and 2, reinforcement constitution 6 includes implantation reinforcing bar 61 and bar-mat reinforcement；The bar-mat reinforcement is included with 90 ° of friendships
At least one layer of transverse steel 62 and at least one layer of longitudinal reinforcement 63 of arrangement are pitched, the transverse steel 62 is located at the longitudinal reinforcement
63 top.
The implantation reinforcing bar 61 is the reinforcing bar of 90 ° of bendings, and its one end is vertically embedded in the normal concrete layer 3 and vertical
In the bar-mat reinforcement, the other end parallel to the transverse steel 62 and with the transverse steel 62 in the same plane；And institute
State implantation reinforcing bar 61 to be organized in pairs, respectively positioned at the both sides of the hinge seam 1.
In a concrete operations, the implantation reinforcing bar 61 selects grade III steel, its a diameter of 10mm, its paving in horizontal direction
If spacing is 300mm, it is 200mm in the laying spacing of longitudinal direction；The transverse steel 62 and longitudinal reinforcement 63 are also selected
Grade III steel, a diameter of 12mm of the transverse steel 62, laying spacing is 100mm；The longitudinal reinforcement 6) a diameter of 10mm,
Laying spacing is 100mm, can also use the reinforcing bar of other specifications；Wherein, implantation reinforcing bar 61, transverse steel 62 and longitudinal reinforcement 63
Between using welding or with thin muscle colligation.
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
Steel bar concrete reinforcement thickness is more uniform, improves its cracking resistance, and hinge seam destruction is drawn in reparation Hollow Slab Beam Bridge simultaneously
The single slab bearing problem and the bending bearing capacity of raising hollow slab girder risen.
Embodiment three
The present embodiment is the reinforcement means for the Hollow Slab Beam Bridge structure that the ultra-high performance concrete described in embodiment two is reinforced,
It is comprised the following steps that：The asphalt concrete layer (about 6~10mm) originally laid on Hollow Slab Beam Bridge surface is first cut during construction, is revealed
Go out normal concrete layer；Along hinge seam both sides, the embedded implantation reinforcing bar on normal concrete layer；Normal concrete layer is cleaned out
(without specially treateds such as dabbings) lays bar-mat reinforcement afterwards, and the bar-mat reinforcement includes one layer of horizontal steel and one layer of longitudinal reinforcement；Then
Thin layer ultra-high performance concrete is poured on normal concrete layer, and implantation reinforcing bar and bar-mat reinforcement are buried to wherein, superelevation is formed
Performance concrete back-up coat (about 3~5mm)；Pour and finish rear ultra-high performance concrete back-up coat normal temperature maintenance 2 hours, Ran Hou
Ultra-high performance concrete reinforces layer surface and paves asphalt concrete pavement layer to the former height of bridge floor, and this reduces pitch coagulation accordingly
The height (reducing about 3~5mm) of soil layer.
Wherein, bar-mat reinforcement matches somebody with somebody bar-mat reinforcement to be close, and the nominal diameter of selected reinforcing bar is smaller, and 12mm is not exceeded.
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 (10)
1. the Hollow Slab Beam Bridge structure that a kind of ultra-high performance concrete is reinforced, including side by side using the cored slab of hinge seam (1) connection
Beam (2) and the bridge deck pavement being layed in above hollow slab girder (2), it is characterised in that the bridge deck pavement is from the bottom to top
It is followed successively by normal concrete layer (3), ultra-high performance concrete back-up coat (4) and asphalt concrete layer (5)；Wherein, the superelevation
The reinforcement constitution (6) being connected with normal concrete layer is set inside performance concrete back-up coat (4).
2. Hollow Slab Beam Bridge structure according to claim 1, it is characterised in that the reinforcement constitution (6) includes implantation
Reinforcing bar (61) and bar-mat reinforcement；The bar-mat reinforcement includes at least one layer of transverse steel (62) and at least one layer of longitudinal reinforcement (63), institute
Transverse steel (62) and longitudinal reinforcement (63) are stated with 90 ° of arranged crosswises, the transverse steel (62) is located at the longitudinal reinforcement
(63) top.
3. Hollow Slab Beam Bridge structure according to claim 2, it is characterised in that the implantation reinforcing bar (61) is 90 ° of bendings
Reinforcing bar.
4. Hollow Slab Beam Bridge structure according to claim 2, it is characterised in that one end of the implantation reinforcing bar (61) is vertical
In the embedded normal concrete layer (3) and perpendicular to the bar-mat reinforcement, the other end parallel to the transverse steel (62) and with
Transverse steel (62) place is in the same plane.
5. Hollow Slab Beam Bridge structure according to claim 2, it is characterised in that the implantation reinforcing bar (61) is organized in pairs,
And it is located at the both sides of the hinge seam (1) respectively.
6. Hollow Slab Beam Bridge structure according to claim 1, it is characterised in that the thickness of the normal concrete layer (3)
For 6~10cm, the thickness of the ultra-high performance concrete back-up coat (4) is 3~5cm, the thickness of the asphalt concrete layer (5)
For 3~5cm.
7. Hollow Slab Beam Bridge structure according to claim 2, it is characterised in that the implantation reinforcing bar (61) is grade III steel,
A diameter of 10mm of the implantation reinforcing bar (61), it is 300mm, its laying in longitudinal direction in the laying spacing of horizontal direction
Spacing is 200mm.
8. Hollow Slab Beam Bridge structure according to claim 2, it is characterised in that the transverse steel (62) and longitudinal reinforcement
(63) it is grade III steel, a diameter of 12mm of the transverse steel (62), laying spacing is 100mm；The longitudinal reinforcement (63)
A diameter of 10mm, laying spacing be 100mm.
9. a kind of reinforcement means of Hollow Slab Beam Bridge structure as claimed in claim 1, it is characterised in that comprise the following steps：
Step 1) the protobitumen concrete layer on Hollow Slab Beam Bridge surface is cut, expose normal concrete layer；
Step 2) along hinge seam both sides, embedded implantation reinforcing bar, bar-mat reinforcement is laid after cleaning on normal concrete layer；
Step 3) thin layer ultra-high performance concrete is poured on normal concrete layer, and implantation reinforcing bar and bar-mat reinforcement are buried to it
In, form ultra-high performance concrete back-up coat；
Step 4) pour and finish after, normal temperature maintenance is carried out to ultra-high performance concrete back-up coat, it is then mixed in thin layer very-high performance
Solidifying soil layer surface paves asphalt concrete layer.
10. reinforcement means according to claim 9, it is characterised in that the step 4) in, the time of normal temperature maintenance is 2
Hour.
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| CN201710515423.0A CN107090783A (en) | 2017-06-29 | 2017-06-29 | Hollow Slab Beam Bridge structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced |
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| CN201710515423.0A CN107090783A (en) | 2017-06-29 | 2017-06-29 | Hollow Slab Beam Bridge structure and its reinforcement means that a kind of ultra-high performance concrete is reinforced |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108086081A (en) * | 2017-12-26 | 2018-05-29 | 上海申继交通科技有限公司 | A kind of road maintenance construction method |
| CN108457201A (en) * | 2018-02-06 | 2018-08-28 | 山西省交通科学研究院 | Ultra-high performance concrete lattice ruggedized construction and its method for reinforcing masonry arch bridge |
| CN110158462A (en) * | 2019-05-09 | 2019-08-23 | 中铁大桥科学研究院有限公司 | Reinforcement construction, concrete-bridge and construction method for concrete-bridge part |
| CN110552289A (en) * | 2019-09-30 | 2019-12-10 | 中交第三公路工程局有限公司工程总承包分公司 | Ultra-high performance concrete combined bridge deck pavement layer structure and construction method thereof |
| CN112323655A (en) * | 2020-11-24 | 2021-02-05 | 南京梦联桥材料科技有限公司 | Reinforcing method for changing simple support of existing hollow plate beam into continuous support |
| CN113526920A (en) * | 2021-08-20 | 2021-10-22 | 山东省水利科学研究院 | Cast-in-situ hollow stressed reinforced concrete wallboard and construction method thereof |
| CN113981839A (en) * | 2021-10-22 | 2022-01-28 | 中冶南方城市建设工程技术有限公司 | Method for reinforcing transverse overall performance of prefabricated hollow slab beam |
| CN115030216A (en) * | 2022-07-12 | 2022-09-09 | 湖南省第六工程有限公司 | Construction elevator foundation structure and construction method thereof |
| CN116892178A (en) * | 2023-09-11 | 2023-10-17 | 湖南大学 | Reinforcing method of hollow slab girder bridge based on UHPC |
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| CN108086081A (en) * | 2017-12-26 | 2018-05-29 | 上海申继交通科技有限公司 | A kind of road maintenance construction method |
| CN108457201A (en) * | 2018-02-06 | 2018-08-28 | 山西省交通科学研究院 | Ultra-high performance concrete lattice ruggedized construction and its method for reinforcing masonry arch bridge |
| CN110158462A (en) * | 2019-05-09 | 2019-08-23 | 中铁大桥科学研究院有限公司 | Reinforcement construction, concrete-bridge and construction method for concrete-bridge part |
| CN110158462B (en) * | 2019-05-09 | 2024-04-02 | 中铁大桥科学研究院有限公司 | Reinforcing structure for local part of concrete bridge, concrete bridge and construction method |
| CN110552289A (en) * | 2019-09-30 | 2019-12-10 | 中交第三公路工程局有限公司工程总承包分公司 | Ultra-high performance concrete combined bridge deck pavement layer structure and construction method thereof |
| CN112323655A (en) * | 2020-11-24 | 2021-02-05 | 南京梦联桥材料科技有限公司 | Reinforcing method for changing simple support of existing hollow plate beam into continuous support |
| CN112323655B (en) * | 2020-11-24 | 2022-09-30 | 南京迈越材料科技有限公司 | Reinforcing method for changing simple support of existing hollow plate beam into continuous support |
| CN113526920B (en) * | 2021-08-20 | 2024-01-12 | 山东省水利科学研究院 | Cast-in-situ hollow stressed reinforced concrete wallboard and construction method thereof |
| CN113526920A (en) * | 2021-08-20 | 2021-10-22 | 山东省水利科学研究院 | Cast-in-situ hollow stressed reinforced concrete wallboard and construction method thereof |
| CN113981839A (en) * | 2021-10-22 | 2022-01-28 | 中冶南方城市建设工程技术有限公司 | Method for reinforcing transverse overall performance of prefabricated hollow slab beam |
| CN115030216B (en) * | 2022-07-12 | 2024-01-26 | 湖南省第六工程有限公司 | Construction elevator foundation structure and construction method thereof |
| CN115030216A (en) * | 2022-07-12 | 2022-09-09 | 湖南省第六工程有限公司 | Construction elevator foundation structure and construction method thereof |
| CN116892178A (en) * | 2023-09-11 | 2023-10-17 | 湖南大学 | Reinforcing method of hollow slab girder bridge based on UHPC |
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