CN207669467U - A kind of compound concrete track plates of 3D printing - Google Patents
A kind of compound concrete track plates of 3D printing Download PDFInfo
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- CN207669467U CN207669467U CN201721635618.0U CN201721635618U CN207669467U CN 207669467 U CN207669467 U CN 207669467U CN 201721635618 U CN201721635618 U CN 201721635618U CN 207669467 U CN207669467 U CN 207669467U
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Abstract
The utility model discloses a kind of compound concrete track plates of 3D printing, the track plates, including sandwich layer, enhancement layer and reinforcing frame, sandwich layer is formed by steel fiber reinforced concrete or plain concrete through 3D printing, and enhancement layer and reinforcing frame are formed by steel fiber reinforced concrete through 3D printing；The prefabricated track plates, include the following steps：The cleaning of track plates printing template and the installation of built-in fitting and casing；The 3D printing of track plates bottom track and bottom enhancement layer；The 3D printing of reinforcing frame and sandwich layer；The 3D printing of crown-reinforcing；Maintenance and demoulding.The track plates obtained using the method for prefabricating of the application, it is printed using large-scale 3D printer hierarchical block as printed material using steel fiber reinforced concrete, plain concrete, without arranging reinforcing bar or presstressed reinforcing steel, it can significantly improve cracking resistance, shock resistance and the anti-fatigue performance of concrete railway board, the production technology for simplifying track plates, reduces the project cost of track plates.
Description
Technical field
The utility model is related to building material fields, and in particular to a kind of compound concrete track plates of 3D printing and its
Method for prefabricating.
Background technology
High-speed railway by its speed is fast, carrying capacity is big, safe and reliable, energy conservation and environmental protection, the traditional railways such as economical and practical without
The advantage of method analogy, shows booming vigorous pace in worldwide.By 2016 end of the years, China's high-speed iron
Road construction and operating mileage have reached 22,000km, occupy the 2/3 of whole world total amount.Compared with traditional Ballast track, no tiny fragments of stone, coal, etc. rail
Stage property has outstanding advantages of track stability, rigidity uniformity and durability are good, ride comfort is high, maintenance load is small, in high speed
It is widely applied in railway.Wherein, platy ballastless track structure is high with intensity, elasticity is good, easy construction, disease occurs
When it is easy to maintenance the advantages that, in countries in the world, application is relatively early also more.It is that rail is supported on tool by multipair fastener system
Have on the armored concrete or prestressed concrete plate i.e. track plates of one fixed width and length, track plates be placed on infrastructure it
On.Track plates are structural elements crucial in slab track structure, it directly bears train load and environmental activity.Track plates
Cracking and the damaged operation security for directly affecting bullet train.
Currently, most of fragment-free track slab uses armored concrete or prestressed concrete railway board both at home and abroad, such as
GermanyThe track plates such as I types of CRTS in plate, Japanese cell board and China, II type, III template.In concrete track
Arrangement reinforcing bar or tensioned prestressing bar, can play the characteristic that steel examining tensile behavior is good and concrete compression performance is good, energy in plate
Enough meet train load and environmental activity effect lower rail guidance tape load-carrying properties and deformation requirements, control track plates do not crack or
Fracture width meets design requirement.However, due to the repeated action of the early-age shrinkage of concrete, environmental activity and train load,
The measures such as configuration reinforcement and tensioned prestressing bar cannot effectively block the appearance and development of concrete microcrack in track plates, right
The durability and train traffic safety of track structure have buried security risk.In addition, traditional concrete railway board steel bar meter,
The workload of binding and prestressed stretch-draw is larger, and production technology is complicated, and production efficiency is not high, and there are floor spaces for track plate factory
Greatly, the problems such as construction cost is high, and track plates comprehensive cost is high.
Steel fiber reinforced concrete be in normal concrete mix random distribution short steel fibre be formed by it is a kind of novel
Heterogeneous composite material.The steel fibre of these random distributions can effectively hinder to shrink and plastic deformation causes inside concrete micro-
The extension in crack and the formation of macrocrack significantly improve tension, bending resistance, shock resistance and the anti-fatigue performance of concrete,
With preferable ductility, toughness and durability.Steel fiber reinforced concrete as a kind of important modified concrete, architectural engineering,
The industries such as road and science of bridge building, hydraulic engineering, port engineering and railway construction are widely used.A large amount of experiment is ground
Study carefully proof, the mixing of steel fiber in concrete sleeper can significantly improve the cracking resistance of sleeper, shock resistance and antifatigue
Performance.
3D printing (3DP) be one kind based on digital model file, can bond material with powdery metal, plastics etc.
Material constructs the new technology of object rapid shaping by layer-by-layer printing using digital technology file printing machine.The technology
Do not increase cost, product diversification with manufacture complex article and does not increase cost, without assembling, zero-time delivery, design space
Infinitely, zero technical ability is manufactured, is not taken up space, portable manufacture, reducing waste by-product, material endless combinations, accurate physical replication
Etc. advantages.Currently, 3D printing technique is widely used in machinery and automobile making, industrial design, aerospace, dentistry and medical treatment
The fields such as industry, civil engineering.3D printing is just helping to use from industry-by-industry, with the people of different background and level professional technology
Similar mode reduces all trades and professions major product cost, time and complicated sexual dysfunction.
In order to improve the cracking resistance of concrete railway board, shock resistance and the comprehensive mechanical properties such as antifatigue, simplify track plates
Production technology improves production efficiency, reduces the cost of manufacture of track plates, researches and develops the fiber concrete track based on 3D printing technique
Plate manufacturing process can be effectively saved manpower and materials, reduce engineering comprehensive cost, have boundless market prospects.
Utility model content
Technical problem to be solved in the utility model is：For existing concrete track harden structure cracking resistance, shock resistance
Deficiency, the deficiency that production technology is complicated, comprehensive cost is high with anti-fatigue performance, provide a kind of compound concrete of 3D printing
Track plates and its method for prefabricating are that printed material uses large-scale 3D printer hierarchical block using steel fiber reinforced concrete, plain concrete
It prints, without arranging reinforcing bar or presstressed reinforcing steel, can significantly improve the cracking resistance of concrete railway board, shock resistance and antifatigue
Performance simplifies the production technology of track plates, reduces the project cost of track plates.
The utility model is solved the above problems by following technological means：
A kind of compound concrete track plates of 3D printing, including sandwich layer are both provided at the top and bottom of the sandwich layer
Enhancement layer, is distributed with multiple reinforcing frames between two enhancement layers, sandwich layer by steel fiber reinforced concrete or plain concrete through 3D printing and
At enhancement layer and reinforcing frame are formed by steel fiber reinforced concrete through 3D printing, and the steel fibre volume in enhancement layer and reinforcing frame is mixed
Amount is all higher than the steel fibre volume volume in sandwich layer.
Further, the overall thickness of the track plates is 150-300mm, and the thickness of enhancement layer is the 1/5- of track plates overall thickness
1/3, the thickness of sandwich layer is the 1/3-3/5 of track plates overall thickness.
Further, the overall width of the track plates is 2200-2800mm, and the width of reinforcing frame is 100-200mm.
Further, for being molded the steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including following component：
52.5 grades of 350-500 parts of Portland cements, 50-70 parts of flyash, 30-40 parts of active mineral admixture, 5-10mm rubbles
900-1100 parts, middle sand 600-750 parts, water-reducing rate is more than 30% 5-7 parts of polycarboxylic acid series high efficiency water reducing agent, accelerator 7-12
Part, 120-280 parts of steel fibre.
Further, the steel fibre tensile strength used in the enhancement layer and reinforcing frame is not less than 2000MPa, a diameter of
Ratio between 0.15-0.32mm, length and diameter is 50-70, and the volume volume of steel fibre is in enhancement layer and reinforcing frame
2%-3.5%, the volume volume of steel fibre is 1.5%-2% in sandwich layer.
Prefabricated above-mentioned track plates, include the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and casing；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；
S304：The 3D printing synchronous with the piecemeal of sandwich layer of track plates reinforcing frame；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and demoulding of track plates.
The beneficial effects of the utility model：
1, enhancing and toughening effect of the steel fibre to concrete is utilized in the track plates of the utility model, can effectively control
Plastic Shrinkage of Concrete and infant cracking significantly improve tension, bending resistance, shock resistance and the anti-fatigue performance of track plates, have compared with
Good ductility, toughness and durability.
2, in the track plates of the utility model steel fibre be mainly arranged in track plates top, bottom, surrounding and rail it is inferior
The unfavorable position of stress can save steel fibre under the premise of ensureing that the comprehensive mechanical property of track plates is met the requirements
Dosage reduces the cost of track plates.
3, the track plates of the utility model are beaten using steel fiber reinforced concrete, plain concrete as printed material using advanced 3D
Print technology hierarchical block prints, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency,
Reduce the construction cost of track plate factory and the project cost of track plates.
4, the steel fibre of the track plates bottom surface protrusion of the utility model increases the roughness of board bottom, can improve track plates
The adhesive property of bed boundary is filled with lower part.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and examples.
Fig. 1 is cross-sectional view in the plate of the compound concrete track plates in embodiment.
Fig. 2 is the plate central fore-and-aft vertical plane figure of the compound concrete track plates in embodiment.
Fig. 3 is the 3D printing prefabricated construction flow chart of the compound concrete track plates in embodiment.
Figure label：1- enhancement layers, 2- reinforcing frames, 3- sandwich layers.
Specific implementation mode
For the ease of understanding the utility model, below in conjunction with Figure of description and preferred embodiment to the utility model
Work more comprehensively, meticulously describes, but the scope of protection of the utility model is not limited to embodiment in detail below.
Embodiment 1
Such as Fig. 1-2, it is illustrated that the compound concrete track plates are made of enhancement layer, sandwich layer and reinforcing frame, are reinforced
Layer is arranged in the top and bottom of sandwich layer, and enhancement layer is formed by the steel fiber reinforced concrete of high additive through 3D printing, and sandwich layer is by low-mix
The steel fiber reinforced concrete or plain concrete of amount are formed through 3D printing, and reinforcing frame specifically divides across being arranged between two enhancement layers
Cloth is also formed by steel fiber reinforced concrete through 3D printing in the lower section of surrounding and track laying position, reinforcing frame, by reinforcing
Steel fibre is set in layer and reinforcing frame, enhancing and toughening effect of the steel fibre to concrete is utilized, can effectively control mixed
Solidifying soil plastic shrinkage and infant cracking, significantly improve tension, bending resistance, shock resistance and the anti-fatigue performance of track plates, have preferable
Ductility, toughness and durability, meanwhile, steel fibre is mainly arranged in the inferior stress of top, bottom, surrounding and rail of track plates not
The position of profit can save the dosage of steel fibre under the premise of ensureing that the comprehensive mechanical property of track plates is met the requirements, drop
The low cost of track plates；For being molded the high additive steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including
Following component：52.5 grades of 350 parts of Portland cements, 50 parts of flyash, 30 parts of active mineral admixture, 5mm rubbles 900
Part, 600 parts of middle sand, water-reducing rate is more than 30% 5 parts of polycarboxylic acid series high efficiency water reducing agent, 7 parts of accelerator, 120 parts of steel fibre；Reinforce
Steel fibre tensile strength used in layer and reinforcing frame is not less than 2000MPa, a diameter of 0.15mm, the ratio between length and diameter
50, the volume volume of steel fibre is 2.5% in enhancement layer and reinforcing frame, and the volume volume of steel fibre is 1.5% in sandwich layer, is added
Steel fibre volume volume in strong layer and reinforcing frame is all higher than the steel fibre volume volume in sandwich layer.
Prefabricated above-mentioned track plates, as shown in figure 3, including the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and casing；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；The steel fibre of bottom enhancement layer protrudes track
The steel fibre in board bottom face, protrusion increases the roughness of board bottom, can improve the caking property of track plates and lower part filling bed boundary
Energy；
S304：The 3D printing synchronous with the piecemeal of sandwich layer of track plates reinforcing frame；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and demoulding of track plates.
In the present embodiment, the thickness of prefabricated obtained track plates, overall thickness 150mm, enhancement layer is track plates overall thickness
1/5, the thickness of sandwich layer is the 3/5 of track plates overall thickness；The overall width of track plates is 2200mm, and reinforcing frame is cuboid shape,
The width of reinforcing frame is 100mm.
Using above-mentioned method for prefabricating, enhancement layer, sandwich layer and reinforcing frame are all made of advanced 3D printing technique layering point
Block prints, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduce track plates
The construction cost of plate factory and the project cost of track plates.
Embodiment 2
Such as Fig. 1-2, it is illustrated that the compound concrete track plates are made of enhancement layer, sandwich layer and reinforcing frame, are reinforced
Layer is arranged in the top and bottom of sandwich layer, and enhancement layer is formed by the steel fiber reinforced concrete of high additive through 3D printing, and sandwich layer is by low-mix
The steel fiber reinforced concrete or plain concrete of amount are formed through 3D printing, and reinforcing frame specifically divides across being arranged between two enhancement layers
Cloth is also formed by steel fiber reinforced concrete through 3D printing in the lower section of surrounding and track laying position, reinforcing frame, by reinforcing
Steel fibre is set in layer and reinforcing frame, enhancing and toughening effect of the steel fibre to concrete is utilized, can effectively control mixed
Solidifying soil plastic shrinkage and infant cracking, significantly improve tension, bending resistance, shock resistance and the anti-fatigue performance of track plates, have preferable
Ductility, toughness and durability, meanwhile, steel fibre is mainly arranged in the inferior stress of top, bottom, surrounding and rail of track plates not
The position of profit can save the dosage of steel fibre under the premise of ensureing that the comprehensive mechanical property of track plates is met the requirements, drop
The low cost of track plates；For being molded the steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including such as the following group
Point：52.5 grades of 400 parts of Portland cements, 60 parts of flyash, 35 parts of active mineral admixture, 1000 parts of 8mm rubbles, middle sand
700 parts, water-reducing rate is more than 30% 6 parts of polycarboxylic acid series high efficiency water reducing agent, 10 parts of accelerator, 200 parts of steel fibre；Enhancement layer and plus
It is 60 that steel fibre tensile strength used in strong frame, which is not less than the ratio between 2000MPa, a diameter of 0.20mm, length and diameter, is added
The volume volume of steel fibre is 2% in strong layer and reinforcing frame, and the volume volume of steel fibre is 1.8% in sandwich layer, enhancement layer and
Steel fibre volume volume in reinforcing frame is all higher than the steel fibre volume volume in sandwich layer.
Prefabricated above-mentioned track plates, as shown in figure 3, including the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and casing；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；
S304：The 3D printing synchronous with the piecemeal of sandwich layer of track plates reinforcing frame；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and demoulding of track plates.
In the present embodiment, the thickness of prefabricated obtained track plates, overall thickness 200mm, enhancement layer is track plates overall thickness
1/5, the thickness of sandwich layer is the 3/5 of track plates overall thickness；The overall width of track plates is 2500mm, and reinforcing frame is cuboid shape,
The width of reinforcing frame is 150mm.
Using above-mentioned method for prefabricating, enhancement layer, sandwich layer and reinforcing frame are all made of advanced 3D printing technique layering point
Block prints, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduce track plates
The construction cost of plate factory and the project cost of track plates.
Embodiment 3
Such as Fig. 1-2, it is illustrated that the compound concrete track plates are made of enhancement layer, sandwich layer and reinforcing frame, are reinforced
Layer is arranged in the top and bottom of sandwich layer, and enhancement layer is formed by steel fiber reinforced concrete through 3D printing, and sandwich layer is by steel fiber reinforced concrete
Or plain concrete is formed through 3D printing, reinforcing frame is specifically distributed in surrounding and track across being arranged between two enhancement layers
The lower section of paving location, reinforcing frame are also formed by steel fiber reinforced concrete through 3D printing, by being set in enhancement layer and reinforcing frame
Steel fibre is set, enhancing and toughening effect of the steel fibre to concrete is utilized, can effectively control Plastic Shrinkage of Concrete early
Phase crackle significantly improves tension, bending resistance, shock resistance and the anti-fatigue performance of track plates, has preferable ductility, toughness and durable
Property, meanwhile, steel fibre is mainly arranged in the unfavorable position of the inferior stress of top, bottom, surrounding and rail of track plates, can protect
Under the premise of the comprehensive mechanical property of card track plates is met the requirements, the dosage of steel fibre is saved, the cost of track plates is reduced；
For being molded the steel fiber reinforced concrete of enhancement layer and reinforcing frame by weight, including following component：52.5 grades of common silicic acid
500 parts of salt cement, 70 parts of flyash, 40 parts of active mineral admixture, 1100 parts of 10mm rubbles, 750 parts of middle sand, water-reducing rate is more than
7 parts of 30% polycarboxylic acid series high efficiency water reducing agent, 12 parts of accelerator, 280 parts of steel fibre；Steel fibre used in enhancement layer and reinforcing frame
Tensile strength is 70 not less than the ratio between 2000MPa, a diameter of 0.32mm, length and diameter, in enhancement layer and reinforcing frame
The volume volume of steel fibre is 3.5%, and the volume volume of steel fibre is 2% in sandwich layer, the steel fibre in enhancement layer and reinforcing frame
Volume volume is all higher than the steel fibre volume volume in sandwich layer.
Prefabricated above-mentioned track plates, as shown in figure 3, including the following steps：
S301：The preparation of steel fiber reinforced concrete or plain concrete material used in enhancement layer, reinforcing frame and sandwich layer；
S302：The cleaning of track plates printing template and the installation of built-in fitting and casing；
S303：The 3D printing of track plates bottom track and bottom enhancement layer；The steel fibre of bottom enhancement layer protrudes track
The steel fibre in board bottom face, protrusion increases the roughness of board bottom, can improve the caking property of track plates and lower part filling bed boundary
Energy；
S304：The 3D printing synchronous with the piecemeal of sandwich layer of track plates reinforcing frame；
S305：The 3D printing of track plates crown-reinforcing；
S306：The maintenance and demoulding of track plates.
In the present embodiment, the thickness of prefabricated obtained track plates, overall thickness 300mm, enhancement layer is track plates overall thickness
1/3, the thickness of sandwich layer is the 1/3 of track plates overall thickness；The overall width of track plates is 2800mm, and reinforcing frame is cuboid shape,
The width of reinforcing frame is 200mm.
Using above-mentioned method for prefabricating, enhancement layer, sandwich layer and reinforcing frame are all made of advanced 3D printing technique layering point
Block prints, and without arranging reinforcing bar or presstressed reinforcing steel, simplifies production technology, improves production efficiency, reduce track plates
The construction cost of plate factory and the project cost of track plates.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the right of the utility model.
Claims (4)
1. a kind of compound concrete track plates of 3D printing, it is characterised in that：Including sandwich layer, the top and bottom of the sandwich layer
It is both provided with enhancement layer, multiple reinforcing frames are distributed between two enhancement layers, sandwich layer is passed through by steel fiber reinforced concrete or plain concrete
3D printing forms, and enhancement layer and reinforcing frame are formed by steel fiber reinforced concrete through 3D printing, and the steel in enhancement layer and reinforcing frame is fine
Dimension volume volume is all higher than the steel fibre volume volume in sandwich layer.
2. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：The track plates it is total
Thickness is 150-300mm, and the thickness of enhancement layer is the 1/5-1/3 of track plates overall thickness, and the thickness of sandwich layer is track plates overall thickness
1/3-3/5.
3. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：The track plates it is total
Width is 2200-2800mm, and the width of reinforcing frame is 100-200mm.
4. the compound concrete track plates of 3D printing according to claim 1, it is characterised in that：The enhancement layer and
Steel fibre tensile strength used in reinforcing frame is not less than the ratio between 2000MPa, a diameter of 0.15-0.32mm, length and diameter
For 50-70, the volume volume of steel fibre is 2%-3.5% in enhancement layer and reinforcing frame, the volume volume of steel fibre in sandwich layer
For 1.5%-2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721635618.0U CN207669467U (en) | 2017-11-30 | 2017-11-30 | A kind of compound concrete track plates of 3D printing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721635618.0U CN207669467U (en) | 2017-11-30 | 2017-11-30 | A kind of compound concrete track plates of 3D printing |
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| Publication Number | Publication Date |
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| CN207669467U true CN207669467U (en) | 2018-07-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107825560A (en) * | 2017-11-30 | 2018-03-23 | 中南大学 | The compound concrete track plates and its method for prefabricating of a kind of 3D printing |
| CN110468629A (en) * | 2019-08-28 | 2019-11-19 | 吴永芳 | For assembled track viscoplasticity bed course manufacturing method and equipment, viscoplasticity bed course |
-
2017
- 2017-11-30 CN CN201721635618.0U patent/CN207669467U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107825560A (en) * | 2017-11-30 | 2018-03-23 | 中南大学 | The compound concrete track plates and its method for prefabricating of a kind of 3D printing |
| CN107825560B (en) * | 2017-11-30 | 2023-06-09 | 中南大学 | 3D printed composite concrete track plate and prefabricating method thereof |
| CN110468629A (en) * | 2019-08-28 | 2019-11-19 | 吴永芳 | For assembled track viscoplasticity bed course manufacturing method and equipment, viscoplasticity bed course |
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