CN104153305A - Sound barrier and material and production technology of sound barrier - Google Patents
Sound barrier and material and production technology of sound barrier Download PDFInfo
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- CN104153305A CN104153305A CN201410413084.1A CN201410413084A CN104153305A CN 104153305 A CN104153305 A CN 104153305A CN 201410413084 A CN201410413084 A CN 201410413084A CN 104153305 A CN104153305 A CN 104153305A
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Abstract
The invention relates to a sound barrier plate, in particular to an integral extrusion formed type inorganic sound absorption and isolation barrier plate suitable for a high-speed railway bridge, and a material and technology for producing the sound barrier plate. A sound barrier comprises a sound absorption and isolation plate body integrally formed in an extruded mode. Cavities are formed in the sound absorption and isolation plate body at intervals, and the air cavities penetrate through the sound absorption and isolation plate body in the length direction of the sound absorption and isolation plate body. The production technology of the sound barrier comprises the following steps that firstly, inorganic mortar is stirred evenly, secondly, the evenly stirred mixture is integrally and constantly extruded through an extruding machine to form formed slabs, thirdly, the continuous slabs are cut to length according to the length requirement of the sound barrier, fourthly, the sound barrier cut to length is shaped under the high temperature and high pressure, and fifthly, a sound absorption layer is inserted into the sound barrier. The integral extrusion forming production process is industrial flow production, equipment is advanced, the technological process is efficient, and waste water, waste gas and waste producing products cannot be produced in the producing process.
Description
Technical field
The present invention relates to a kind of sound barrier panel, particularly a kind of material and technology that is applicable to the inorganic sound absorbing-insulating baffle of integral extrusion formation type of high-speed railway bridge and produces sound barrier panel.
Background technology
Along with the development of China Express Railway, high speed railway sound barrier technology is also checked in practice and is developed.Railway sound barrier is as the indispensable important auxiliary of Along Railway, guarantees that its safety, functional, economy, view are no doubt important, the more important thing is and how to ensure durability and reduce Inspection and maintenance cost in lifetime.
High speed railway sound barrier is except having good acoustical behavior, the more important thing is how aerodynamic noise and its impact on sound barrier of positive and negative pressure fluctuation meter, particularly railroad bridge section sound barrier of being adapted to form with train running speed realize homogeneity with bridge architecture, with the life-span, are necessary.China's current engineering structural reliability design standard regulation " safe class of railroad bridge structure is one-level; the design basis life-span is 100 years ", and existing railway bridge noise barrier projected life is only 25 years, bridge and sound barrier differ too large projected life, are because acoustic current barrier market can not reach standard gauge provisioning request for product quality.
Railway sound barrier particularly high-speed railway bridge sound barrier is comprised of column and sound barrier panel spigot-and-socket, and column is formed through galvanizing by dipping by H shaped steel, and sound barrier panel mainly adopts metal type Felt, and metallic sound shield plates poor durability, life-span is short, and engineering construction cost is high, and cost performance is low.
Also have and adopt nonmetal sound barrier, nonmetal sound barrier panel is mainly used in railway bed section, and its pattern is in the majority at present, and material is mainly divided into cement based and thermosetting resin base and polycarbonate plate etc.As disclosed Chinese patent application on June 18th, 2014, publication number is CN103866704A, it discloses a kind of monolithic RPC sound barrier for high-speed railway, cement based sound barrier adds the lightweight aggregates such as flyash, slag, pozzolan mostly for reducing density, its intensity is poor, generally with steel reinforcing, strengthen, manufacture craft adopts traditional casting forming method mostly, and it still exists, and surface density is high, weak strength, heaviness is coarse, not attractive in appearance, cost of transportation is high, installation is difficult, acoustically effective is poor, cost performance is low old problem.
Also have and adopt whole compressing sound barrier, as the Chinese patent of notice of authorization on the 12nd September in 2012, notification number is CN202430638U, it discloses a kind of integral body and has been pressed into the nonmetal sound barrier of pattern high-speed railway, its sound barrier is can Integratively compressing, but the defect of this technology is compressing mould, need to change according to the sound barrier of different length or shape, increase cost of production, and compressing sound barrier length can not be long, otherwise cannot be whole compressing.
Summary of the invention
Technique effect of the present invention can overcome above-mentioned defect, and a kind of sound barrier panel of integral type is provided, its overall structure high-strength light, long service life.
For achieving the above object, the present invention adopts following technical scheme: it comprises sound absorption plate body, the extrusion molding of described sound absorption plate body one, and described sound absorption plate body internal layout is provided with cavity, and cavity connects sound absorption plate body along Felt body length direction.
Sound absorption plate body internal layout is provided with cavity, and it is hollow structure, guaranteeing, on the basis of sound barrier intensity, to greatly reduce substance, provides cost savings.The sound barrier of one extrusion molding, overall structure completely by inorganic material mix through vacuum extruding mode global formation, its section profile is the rectangle of case beam frame construction, stabilized structure, resistance to deformation under high-speed railway aerodynamic force operating mode, anti-fatigue life can reach 4,000,000 times, ensures long-term security.Overall structure is strengthened works without other, and by self frame construction carrying, integral light is high-strength completely.Integral extruding type sound barrier of the present invention, has overcome defective workmanship and quality problems that existing metallic sound barrier multi-part assembling brings, the long-life of products quality guarantee from material and technique.
Sound absorption plate body is inner side plate body near a side of sound source, offers sound absorption through hole on the plate body of inner side, and sound absorption through hole is communicated with the cavity that closes on inner side plate body.The aperture of sound absorption through hole is between 3-10 ㎜, percent opening, between 15-30%, comprises that acoustic chamber and sound absorption material design flow resistance are at 1144pa, and 100hz-6300hz third-octave frequency range sound absorbing capabilities reaches optimum efficiency, sound absorption coefficient is more than 0.7, and its acoustical behavior is steady in a long-term.
The back side of inner side plate body is provided with absorbent treatment, and absorbent treatment is positioned at cavity and over against absorbing sound through hole.Noise enters in cavity by sound absorption through hole, and absorbs a part of noise by the absorbent treatment in cavity, realizes noise reduction object.Absorbent treatment adopts conventional sound absorption material in prior art.
In cavity, be provided with stopper slot, absorbent treatment is plugged in cavity by stopper slot, is convenient to the assembling of absorbent treatment.
Preferably, cavity is and shows order setting along Felt height direction, and cavity at least arranges row.Cavity arranges and refers to that the cavity size of every row is basic identical in order, the cavity size of different lines can be the same or different, setting also can arrange the cavity interval of different size in order, as long as intensity, the reasonable stress that guarantees sound barrier is set according to certain rule.
The upper surface of sound absorption plate body and soffit are respectively equipped with wedge mouth.It is arranged with concavo-convex wedge mouth in upper and lower surface, directly upper and lower sound barrier is inserted by concavo-convex wedge mouth location, and play sound insulation effect (noise can not pass the junction of upper and lower sound barrier) during installation.
Preferably, plate body front in inner side is nonplanar structure.Various facades can be extruded in plate body front, inner side, and it has good landscape effect and acoustics dispersion effect.
Sound absorption plate body adopts the extrusion molding of inorganic material one.Integral extrusion moulding Felt strengthens moulding by high-strength cement based cementitious material and high-strength and high-modulus composite fibre, HTHP sizing forms, there is firm multi-cavity hollow frame construction characteristic, material physicochemical property is stable, machining property is good, plate surface density is less than 100kg/m2, be greater than ± 5000pa of ant wind load.
Another object of the present invention is to provide a kind of material of producing sound barrier panel, the whole inorganic material that adopts of sound barrier, it adopts the raw material of following weight ratio: 30～70 parts of portland cements, 10～30 parts of quartz sands, 5～15 parts of composite fibres, 2～8 parts of plasticizing agent, 10～30 parts of water.
The inorganic material the present invention relates to is usingd the mortar of high-strength cement, levigate quartz sand, flyash, expanded perlite, plasticizing agent and water mix as cementitious material, fortifying fibre used mainly adopts the composite strengthening such as carbon based fibers, glass fiber, metallic fiber with high strength, high-modulus, polymolecularity, high adhesion, through surperficial specially treated, have good dispersiveness and bonding force, the prolonged use of material is stainless does not lose anti-aging mistake.
The present invention can adopt the raw material of said ratio, also can adopt other ratio range or other inorganic material, as long as can meet sound barrier physical property after the requirement of integral extrusion moulding process and moulding.
With inorganic dyestuff, in extrusion molding, mix quality with cementitious material, be difficult for for a long time shank color.Whole material adopts Inorganic Non-metallic Materials advanced manufacturing process to make, and ensures that its operating period safeguards less, is greater than 50 years application life.
Another object of the present invention is to provide a kind of sound barrier production technology, comprises the steps:
(1) inorganic mortar is stirred;
(2) mix stirring is through the whole uninterrupted extrusion molding slab of vacuum-extruder;
(3) continuous slab is carried out to fixed ruler cutting according to sound barrier length requirement;
(4) sound barrier after fixed ruler cutting is shaped through HTHP;
(5) absorbent treatment is inserted in sound barrier cavity.
The described inorganic sound absorbing-insulating barrier of integral extrusion formation type comprises hollow box girder construction sound insulation body and chamber structure sound absorption body, all with inorganic coagulation material, add high strength fibre composite strengthening, overall vacuum extrusion molding, HTHP sizing, machine drilling forms.
In step (4), the temperature of sizing is 150～200 ℃, and pressure is 3～10MPa.
Can be directly in manufacturing process on sound barrier one extrude the backboard of hollow, absorbent treatment is set directly on the backboard of hollow, also can be preferably, in step (4), after sizing, on the plate body of the inner side of sound barrier, bore a hole, form sound absorption through hole.
Integral extrusion moulding manufacturing process is batch production Production line, and equipment is advanced, and technological process is efficient, and manufacturing process does not produce waste water, waste gas, discards at goods; The perforation processing of sound absorption panel adopts automation equipment, locates accurate efficiency high, collects perforation dust raw materialization recycling, and whole process is easy to realize clean carrying out production strictly in line with rules and regulations.
Accompanying drawing explanation
Fig. 1 is the inorganic sound absorbing-insulating baffle of integral extrusion formation type front schematic view;
Fig. 2 is embodiment 1 sound barrier side internal construction schematic diagram;
Fig. 3 is embodiment 2 sound barrier side internal construction schematic diagrames;
Fig. 4 is embodiment 3 sound barrier side internal construction schematic diagrames;
Fig. 5 is embodiment 4 sound barrier side internal construction schematic diagrames;
Fig. 6 is embodiment 5 sound barrier side internal construction schematic diagrames;
Fig. 7 is embodiment 6 sound barrier side internal construction schematic diagrames;
Fig. 8 is embodiment 7 sound barrier side internal construction schematic diagrames;
Fig. 9 is embodiment 8 sound barrier side internal construction schematic diagrames.
In figure: 1-sound absorption plate body; 2-cavity; 3-absorbent treatment; 4-wedge mouth; Plate body outside 11-; The 111-through hole that absorbs sound; 21-stopper slot.
The specific embodiment
Embodiment 1
Sound barrier production technology, comprises the steps:
(1) inorganic mortar is stirred, described inorganic mortar adopts the raw material of following weight ratio: 50 parts of portland cements, 20 parts of quartz sands, 10 parts of composite fibres, 5 parts of plasticizing agent, 22 parts of water.The raw material that described integral extrusion moulding is used are 52.5R portland cement, SiO
2content higher than 96% and fineness be greater than 200 object frosted quartz sands, average grain diameter and be less than the expanded perlite of 1 ㎜ and the mortar of water institute mix as gelling base material, adding young's modulus of elasticity is greater than 400mpa, tensile strength and is greater than polypropylene fibre and the alkali-free glass fibre that 350mpa, diameter are less than 50 μ m, cellulose ether composite strengthening, adds appropriate outer wall inorganic coating quality.
(2) mix stirring is through the whole uninterrupted extrusion molding slab of vacuum-extruder;
(3) continuous slab is carried out to cutting to length according to sound barrier length requirement;
(4) by the sound barrier after cutting to length, at 180 ℃ of temperature, pressure, be 6MPa sizing;
(5) on the plate body of the inner side of sound barrier, wear diameter 7mm sound absorption open-work, percent opening is 21%;
(6) the macromolecular fibre absorbent treatment that by sound absorption coefficient be 0.8, thickness is 20mm inserts in stopper slot.Sound absorption material and stopper slot are integral by inorganic adhesive is bonding.
As shown in Figure 1, sound barrier of the present invention is strip structure, and section hollow rate reaches 52%, and overall structure is firm, high-strength light, and plate surface density is less than 80kg/m
2.
The structural representation of sound barrier inside as shown in Figure 2, comprises sound absorption plate body 1, described sound absorption plate body 1 one extrusion molding, and described sound absorption plate body 1 internal layout is provided with cavity 2, and cavity 2 connects sound absorption plate body 1 along sound absorption plate body 1 length direction.Sound absorption plate body 1 is inner side plate body 11 near a side of sound source, offers sound absorption through hole 111 on inner side plate body 11, and sound absorption through hole 111 is communicated with the cavity that closes on inner side plate body 11.
The back side of inner side plate body 11 is provided with absorbent treatment 3, and absorbent treatment 3 is positioned at cavity 2 and over against absorbing sound hole 111.In cavity 2, be provided with stopper slot 21, absorbent treatment 3 is plugged in cavity 2 by stopper slot 21.Cavity 2 is row rule along sound absorption plate body 1 short transverse and arranges, cavity 2 arranges two row, a row cavity body back to sound source plays sound insulation effect, its sound insulation factor reaches 40dB, cavity towards sound source side plays acoustic chamber effect, between the neighbouring cavity 2 of every row by the case distance between girders of sound absorption plate body 1.
The upper surface of sound absorption plate body 1 is provided with the wedge mouth 4 of protrusion, the wedge mouth 4 that soffit is provided with depression.Plate body 11 fronts, inner side are square-wave form.
Embodiment 2
Sound barrier production technology, comprises the steps:
(1) inorganic mortar is stirred, described inorganic mortar adopts the raw material of following weight ratio: 30 parts of portland cements, 10 quartz sands, 5 parts of composite fibres, 2 parts of plasticizing agent, 10 parts of water.The raw material that described integral extrusion moulding is used are 52.5R portland cement, SiO
2content higher than 96% and fineness be greater than 200 object frosted quartz sands, average grain diameter and be less than the expanded perlite of 1 ㎜ and the mortar of water institute mix as gelling base material, adding young's modulus of elasticity is greater than 400mpa, tensile strength and is greater than polypropylene fibre and the good carbon based fibers of cost performance that 350mpa, diameter are less than 50 μ m, alkali-free glass fibre, cellulose ether composite strengthening, adds appropriate outer wall inorganic coating quality.
(2) mix stirring is through the whole uninterrupted extrusion molding slab of vacuum-extruder;
(3) continuous slab is carried out to cutting to length according to sound barrier length requirement;
(4) by the sound barrier after cutting to length, at 150 ℃ of temperature, pressure, be 3MPa sizing;
(5) on the plate body of the inner side of sound barrier, bore a hole, form sound absorption through hole;
(6) absorbent treatment is inserted in sound barrier, described sound absorption material is weather-resistant polymer sound absorber material, sound absorption coefficient > 0.7.Sound absorption material and cavity are integral by inorganic adhesive is bonding.
As shown in Figure 3, cavity 2 rules arrange two row, and the height of all cavitys 2 is basically identical.
Other are with embodiment 1.
Embodiment 3
Sound barrier production technology, comprises the steps:
(1) inorganic mortar is stirred, described inorganic mortar adopts the raw material of following weight ratio: 70 parts of portland cements, 30 quartz sands, 15 parts of composite fibres, 8 parts of plasticizing agent, 30 parts of water.The raw material that described integral extrusion moulding is used are 52.5R portland cement, SiO
2content higher than 96% and fineness be greater than 200 object frosted quartz sands, average grain diameter and be less than the expanded perlite of 1 ㎜ and the mortar of water institute mix as gelling base material, adding young's modulus of elasticity is greater than 400mpa, tensile strength and is greater than polypropylene fibre and the good carbon based fibers of cost performance that 350mpa, diameter are less than 50 μ m, alkali-free glass fibre, cellulose ether composite strengthening, adds appropriate outer wall inorganic coating quality.
(2) mix stirring is through the whole uninterrupted extrusion molding slab of vacuum-extruder;
(3) continuous slab is carried out to cutting to length according to sound barrier length requirement;
(4) by the sound barrier after cutting to length, at 200 ℃ of temperature, pressure, be 10MPa sizing;
(5) on the plate body of the inner side of sound barrier, bore a hole, form sound absorption through hole;
(6) absorbent treatment is inserted in sound barrier, described sound absorption material is weather-resistant polymer sound absorber material, sound absorption coefficient > 0.7.Sound absorption material and cavity are integral by inorganic adhesive is bonding.
As shown in Figure 4, cavity 2 rules arrange two row, and the height of the cavity 2 of different lines is different.
Other are with embodiment 1.
Embodiment 4
Sound barrier production technology, comprises the steps:
(1) inorganic mortar is stirred, described inorganic mortar adopts the raw material of following weight ratio: 30 parts of portland cements, 15 parts of quartz sands, 15 parts of composite fibres, 3 parts of plasticizing agent, 20 parts of water.The raw material that described integral extrusion moulding is used are 52.5R portland cement, SiO
2content higher than 96% and fineness be greater than 200 object frosted quartz sands, average grain diameter and be less than the expanded perlite of 1 ㎜ and the mortar of water institute mix as gelling base material, adding young's modulus of elasticity is greater than 400mpa, tensile strength and is greater than the charcoal base fiber that 350mpa, diameter are less than 50 μ m, cellulose ether composite strengthening, adds appropriate outer wall inorganic coating quality.
(2) mix stirring is through the whole uninterrupted extrusion molding slab of vacuum-extruder;
(3) continuous slab is carried out to cutting to length according to sound barrier length requirement;
(4) by the sound barrier after cutting to length, at 180 ℃ of temperature, pressure, be 6MPa sizing;
(5) on the plate body of the inner side of sound barrier, wear diameter 7mm sound absorption open-work, percent opening is 21%;
(6) the macromolecular fibre absorbent treatment that by sound absorption coefficient be 0.8, thickness is 20mm inserts in stopper slot.Sound absorption material and stopper slot are integral by inorganic adhesive is bonding.
As shown in Figure 5, cavity 2 rules arrange two row, and the height of the cavity 2 of different lines is different.Plate body 11 fronts, inner side are wave-like.
Other are with embodiment 1.
Embodiment 5
As shown in Figure 6, cavity 2 rules arrange two row, and the height of the cavity 2 of different lines is different.Plate body 11 fronts, inner side are semifocal chord waveform shape.
Other are with embodiment 1.
Embodiment 6
As shown in Figure 7, cavity 2 rules arrange two row, and the height of the cavity 2 of different lines is different.Plate body 11 fronts, inner side are zigzag fashion.
Other are with embodiment 1.
Embodiment 7
As shown in Figure 8, cavity 2 arranges three row in order, and the cavity of different size is between the upper and lower every setting, and the cavity of middle row is row, and the cavity of upper and lower two row is two row, and the cavity size of middle row is greater than the cavity size of upper and lower two row.
Other are with embodiment 1.
Embodiment 8
As shown in Figure 9, directly on sound barrier, one is extruded the backboard of hollow, absorbent treatment is set directly on the backboard of hollow, does not need to open separately sound absorption through hole.
Other are with embodiment 1.
Claims (12)
1. a sound barrier, comprise sound absorption plate body (1), it is characterized in that, described sound absorption plate body (1) one extrusion molding, sound absorption plate body (1) internal layout is provided with cavity (2), and cavity (2) connects sound absorption plate body (1) along sound absorption plate body (1) length direction.
2. sound barrier according to claim 1, it is characterized in that, sound absorption plate body (1) is inner side plate body (11) near a side of sound source, on inner side plate body (11), offer sound absorption through hole (111), sound absorption through hole (111) is communicated with the cavity that closes on inner side plate body (11).
3. sound barrier according to claim 2, is characterized in that, the back side of inner side plate body (11) is provided with absorbent treatment (3), absorbent treatment (3) be positioned at cavity (2) and over against sound absorption through hole (111).
4. sound barrier according to claim 3, is characterized in that, is provided with stopper slot (21) in cavity (2), and absorbent treatment (3) is plugged in cavity (2) by stopper slot (21).
5. sound barrier according to claim 3, is characterized in that, cavity (2) is and shows order setting along sound absorption plate body (1) short transverse, and cavity (2) at least arranges row.
6. sound barrier according to claim 3, is characterized in that, the upper surface of sound absorption plate body (1) and soffit are respectively equipped with wedge mouth (4).
7. sound barrier according to claim 2, is characterized in that, inner side plate body (11) front is nonplanar structure.
8. sound barrier according to claim 1, is characterized in that, sound absorption plate body (1) adopts the extrusion molding of inorganic material one.
9. an acoustic barrier material, is characterized in that, the whole inorganic material that adopts of sound barrier, and it adopts the raw material of following weight ratio: 30～70 parts of portland cements, 10～30 quartz sands, 5～15 parts of composite fibres, 2～8 parts of plasticizing agent, 10～30 parts of water.
10. a sound barrier production technology, is characterized in that, comprises the steps:
(1) inorganic mortar is stirred;
(2) the whole uninterrupted extrusion molding slab of mixture extruder stirring;
(3) continuous slab is carried out to cutting to length according to sound barrier length requirement;
(4) sound barrier after cutting to length is shaped through HTHP;
(5) absorbent treatment is inserted in sound barrier.
11. production technologies according to claim 10, is characterized in that, in step (4), the temperature of sizing is 150～200 ℃, and pressure is 3～10MPa.
12. production technologies according to claim 10, is characterized in that, in step (4), after sizing, on the plate body of the inner side of sound barrier, bore a hole, and form sound absorption through hole.
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