CN104674688A - Integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of high-speed railway box beam - Google Patents
Integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of high-speed railway box beam Download PDFInfo
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- CN104674688A CN104674688A CN201510133370.7A CN201510133370A CN104674688A CN 104674688 A CN104674688 A CN 104674688A CN 201510133370 A CN201510133370 A CN 201510133370A CN 104674688 A CN104674688 A CN 104674688A
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- sound barrier
- backboard
- high strength
- strength concrete
- speed railway
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0011—Plank-like elements
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0023—Details, e.g. foundations
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of a high-speed railway box beam. The integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of the high-speed railway box beam comprises supporting rib columns continuously arranged at intervals along a railway line; between every two supporting rib columns, one side of the vehicle travelling surface of the railway is a sound adsorption plate, and one side of the back surface of the railway is a back plate; the lower end of each supporting rib column is provided with a rib column embedded part which is connected with a railway bridge embedded part, and the embedded parts are completely covered and solidified on the basis of cast-in-place concrete; the back plate and the supporting rib columns are connected and fixed by bolts, bolt holes are filled and covered with water-proof materials, and the sound adsorption plate and the back plate are fixed by connecting pins and by coating adhesives. According to the integral ultra-high strength concrete-micro-porous ceramic composite sound barrier, a microporous ceramic composite plate of a three-dimensional reticular hole structure is adopted to serve as the sound adsorption plate to meet the performance requirements of sound adsorption and noise reduction, the surface of the three-dimensional reticular hole structure is provided with W-shaped wedges, the rear cavity of the sound adsorption plate which is separated but communicated can be used for enhancing an sound adsorption and sound insulation effect, integral strength is increased by the horizontal rib of the back plate, the design of each water discharge structure can be used for meeting the intensity requirement of a sound barrier and draining in time, and therefore, the weather resistance of the sound barrier is better.
Description
Technical field
The invention belongs to railway operation noise abatement technical field, especially belong to rail noise Treatment process, particularly a kind of integrated compound sound barrier being applied to high-speed railway bridge.
Background technology
Sound barrier is the facility inserted between sound source and recipient, makes Acoustic Wave Propagation have a significant additional attenuation, thus weakens the influence of noise in the certain area at recipient place.
Sound barrier research not only selects there is larger development at material property, to the research that noise barrier structure is also deepening continuously, the metal material that the many employings of existing noise barrier structure are single or Inorganic Non-metallic Materials structure, and the space of a whole page does not design according to high-speed railway feature, installation, fixed structure not being further considered, site operation and railway operation safeguard needs yet, and the new material more not in conjunction with development carries out comprehensive technology exploration to adapt to the noise abatement needs of requirements at the higher level.
No matter sound barrier is metal or nonmetals, all there is anticorrosive and weatherability problem.Although nonmetals corrosion resistance is good, but require high to weather resistance in the applied environment of long term exposure, particularly come off, so guarantee that under severe open-air atmosphere the weather resisteant of structural meterials is the problem that non-metal sound barrier must be considered in the easier weathering in immersion that drenches with rain for a long time.
Summary of the invention
The present invention discloses a kind of super high strength concrete-micropore ceramics compound sound barrier of high speed railway box girder integration according to prior art deficiency.It is better that the problem to be solved in the present invention there is provided a kind of corrosion resistance, and weather resistance is more excellent, and maintenance is little, the integrated non-metal sound barrier that maintenance cost is low.
The present invention is achieved through the following technical solutions:
Super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration, comprise downline and continue spaced ribs post, between every two ribs posts, side, railways train operation face is acoustical board, side, the back side is backboard, it is characterized in that: described ribs post lower end is had rib post built-in fitting to be connected with railroad bridge built-in fitting and covered completely and consolidation by built-in fitting by cast in situ concrete foundation; Described backboard and ribs post are bolted to fix and adopt waterproofing materials to be clogged by bolt hole and cover, and are applied bonding agent and are fixed between described acoustical board and backboard by connecting pin.
Described acoustical board surface has cross-sectional sizes identical and the W shape wedge of continuous transverse setting, the filler strip that the acoustical board back side has interval vertical direction to arrange.
The sound absorption cavity having filler strip to support between described backboard and acoustical board to be formed.
Described backboard has transverse ribs, and backboard lower end has extension to extend ribs post bottom and hidden at the bridge flange plate position on railway basis.
Matching grooves between described filler strip and backboard two transverse ribs is fixed.
Described acoustical board least significant end and cast in situ concrete foundation have between plane be greater than 2 centimetres first sluice and stitch.
The sound barrier that described ribs post and acoustical board and backboard are formed is cambered surface, and the concave direction of cambered surface is towards railways train operation face, and cambered surface radius is 12 ± 0.5 meters.
The bolt connecting hole of described backboard and ribs post is back taper outside backboard and ribs post binding face.
Described acoustical board is the micropore ceramics composite plate of the three-dimensional netted pore structure with unordered connection, and micropore size is 0.5 to 100 micron.
Circular arc or trapezoidal groove between described spaced filler strip, have between bottom portion of groove and backboard transverse ribs be greater than 2 centimetres second sluice and stitch.
Backboard of the present invention and ribs post adopt high strength RPC material to make.In factory's combination after ribs post, acoustical board and backboard are all prefabricated, in-site installation, convenient construction, improves efficiency; Acoustical board and backboard adopt the structure of detachable combination, reduce installation difficulty, facilitate transport of materials, are easy to change.Relative to the various non-metal sound barrier of original design, its intensity, rigidity, durability are better, are more conducive to the optimization of sound barrier force structure.
Sound barrier of the present invention is specially adapted to high-speed railway noise abatement.The both sides of sound barrier downline are arranged.It is ribs post and railway bed or bridge are connected and fixed that above-mentioned ribs post is arranged along rail diatom continuity interval, according to the size dimension of acoustical board and backboard by prefabricated ribs intercolumniation every being fixed on railway bed or bridge, prefabricated acoustical board and backboard are arranged on two sides before and after ribs post and form the sound barrier wall of continuity, acoustical board is arranged on side, railways train operation face, and backboard is arranged on side, the back side.Every block sound barrier unit establishes two or three root posts, ribs column bottom is provided with built-in connection, be connected with bridge flange plate embedded ribs by embedded ribs, then by cast in situ concrete foundation, embedded ribs connector covered consolidation completely and make ribs post and the as a whole structure of bridge consolidation.It is non-maintaining that this structure achieves basis, changes the connected mode of traditional column by bolt, also relieves the anxiety of long-standing problem work business Inspection and maintenance.
The present invention adopts the micropore ceramics composite plate with the three-dimensional netted pore structure of unordered connection as acoustical board, and micropore size is 0.5 to 100 micron.Ultramicropore sound absorption ceramic composite plate is compared with other porous absorption material, sound absorbing capabilities is good, strength and stiffness are higher, dimensionally stable, do not need armour layer, sqound absorption construction is simple, easy for installation, and the noise reduction being specially adapted to the underground buildings such as antinoise barrier and tunnel, underground garage, underground store such as speedway, railway, overhead road of city, urban track traffic uses.The noise that train operation produces is first through acoustical board significantly noise reduction.
Sound barrier form construction design is cambered surface by the three layer construction of the present invention in conjunction with sound barrier and the performance characteristics of acoustical board, the concave surface of cambered surface towards railways train operation face, and by cambered surface radius for being designed to 12 ± 0.5 meters.Cambered surface has better sound-absorbing, reflecting properties, can reduce noise further excessive.
Acoustical board surface of the present invention is W shape wedge, and W shape wedge is arranged by horizontal direction, adopts inorganic glue class material and anchor and position pin to be firmly connected with backboard, rib post.Acoustical board is installed between both sides of the chest post and backboard leans on noise source side, is designed by structure structure form simultaneously, makes to be formed between backboard with acoustical board to be communicated with but the cavity separated, and strengthens suction, soundproof effect.
Be the trapezium structure be integrated with acoustical board at the filler strip in acoustical board and backplane face, the re-entrant portion that spaced filler strip is formed can be designed to semicircle arcuation or trapezoidal.Backboard plate face arranges horizontal rib, backboard horizontal rib and backboard formed by integrally casting shaping, rib can under the backboard of same thickness, increases backboard anti-bending strength.Trapezium structure and the backboard horizontal rib of filler strip form matching grooves, when being fixedly connected with by bonding can fit better fixing.Be bottom circular arc or trapezoidal groove between spaced filler strip and between backboard transverse ribs, have the sluicing being greater than 2 centimetres to stitch, the present invention adopts filler strip acoustical board rear cavity to be separated, filler strip and backboard horizontal rib are adhesively fixed, formed the while that the seam that sluices both having strengthened suction, soundproof effect by the circular arc between intensification filler strip or trapezoidal groove and also solve sluicing problem well, improve the weather resistance of sound barrier.
The bolt connecting hole of backboard and ribs post is back taper outside backboard and ribs post binding face.Ribs post and backboard bolt connecting hole adopt pore-forming in advance, and reverse taper hole is unlikely under vibrating conditions after connecting bolt is installed and is conducive to plugging material sclerosis after shutoff to come off from bolt hole, reaches reliable plugging effect, extends the connecting elements life-span.
Lower end and the sound barrier cast in situ concrete foundation end face of acoustical board have the discrepancy in elevation being greater than 2cm, form the seam that sluices, and to guarantee that sound barrier is discharged by this gap under rainfall environment, unlikelyly in cavity, form ponding.
Rib post bottom is stretched out in backboard bottom, and extends to former design shield bottom position, achieves sound barrier integrated with shield structure, eliminate former bridge floor shield component, thus its structure is more excellent, and construction more simplifies conveniently, both artistic and practical, substantially reduce the number work business maintenance workload.
The present invention adopts three-dimensional netted pore structure and the micropore ceramics composite plate that surface has W shape wedge meets sound absorption reduction performance requirement as acoustical board, separate but be communicated with acoustical board rear cavity strengthen inhale, soundproof effect, backboard horizontal rib adds bulk strength, the design of each water discharging structure had not only met sound barrier requirement of strength but also can draining in time, was that sound barrier weatherability is more excellent.The invention provides a kind of corrosion resistance better, weather resistance is more excellent, and maintenance is little, the integrated non-metal sound barrier that maintenance cost is low.
Accompanying drawing explanation
Fig. 1 is sound barrier installment state structural representation of the present invention;
Fig. 2 is sound barrier unit structure floor map of the present invention;
Fig. 3 is sound barrier ribs post of the present invention and backboard side assembling structural representation;
Fig. 4 is sound barrier ribs post of the present invention, backboard and acoustical board side assembling structural representation;
Fig. 5 is a kind of block construction schematic cross-section of sound barrier of the present invention;
Fig. 6 is the another kind of block construction schematic cross-section of sound barrier of the present invention;
Fig. 7 is sound-absorbing barrier structure schematic diagram of the present invention;
Fig. 8 is sound-absorbing barrier of the present invention and back plate combining structure partial side schematic view;
Fig. 9 is a kind of structure schematic top plan view of sound-absorbing barrier of the present invention;
Figure 10 is the another kind of structure schematic top plan view of sound-absorbing barrier of the present invention;
Figure 11 is sound barrier ribs post of the present invention and backboard connecting portion schematic cross-section;
Figure 12 is sound barrier ribs post of the present invention and backboard connection status partial schematic diagram;
Figure 13 is a kind of feature cross-section schematic diagram of sound barrier backboard of the present invention;
Figure 14 is the another kind of feature cross-section schematic diagram of sound barrier backboard of the present invention;
Figure 15 is sound barrier cast in situ concrete foundation concretion state schematic diagram of the present invention.
In figure, 1 is backboard, and 11 is backboard transverse ribs, and 12 is backboard bolt penetration hole, 13 is backboard extensions, and 2 is ribs posts, and 21 is rib post built-in fittings, 22 is the perforation of rib column bolt, and 3 is cast in situ concrete foundations, and 31 is cast in situ concrete foundation built-in fittings, 4 is railroad bridges, and 41 is railroad bridge built-in fittings, and 5 is acoustical boards, 51 is filler strips, and 52 is W shape wedges, and 6 is connecting pins, 7 is cavitys, and 8 is first sluicing seams, and 9 is second sluicing seams.
Detailed description of the invention
Below by embodiment, the present invention is specifically described; embodiment is only for being further detailed the present invention; can not be interpreted as limiting the scope of the invention, some nonessential improvement that those skilled in the art makes according to the content of the invention described above and adjustment also belong to the scope of protection of the invention.
Composition graphs 1 to Figure 15.
Super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration, comprise downline and continue spaced ribs post 2, between every two ribs posts 2, side, railways train operation face is acoustical board 5, side, the back side is backboard 1, and ribs post 2 lower end is had rib post built-in fitting 21 to be connected with railroad bridge built-in fitting 41 and covered completely and consolidation by built-in fitting by cast in situ concrete foundation 3; Backboard 1 and ribs post 2 are bolted to fix and adopt waterproofing materials to be clogged by bolt hole and cover, and are applied bonding agent and are fixed between acoustical board 5 backboard 1 by connecting pin.
Acoustical board 5 surface has cross-sectional sizes identical and the W shape wedge 52 of continuous transverse setting, the filler strip 51 that acoustical board 5 back side has interval vertical direction to arrange.
Filler strip 51 is had to support the sound absorption cavity 7 formed between backboard 1 and acoustical board 5.
Backboard 1 has transverse ribs 11, and backboard 1 lower end has extension 13 to extend ribs post 2 bottom and hidden at the frange plate position, bridge end on railway basis.
Matching grooves between filler strip 51 and backboard 1 liang of transverse ribs 11 is fixed.
Acoustical board 5 least significant end and cast in situ concrete foundation 3 there is the first sluicing seam 8 being greater than 2 centimetres between plane.
The sound barrier that ribs post 2 is formed with acoustical board 5 and backboard 1 is cambered surface, and the concave direction of cambered surface is towards railways train operation face, and cambered surface radius is 12 ± 0.5 meters.
Backboard 1 is back taper with the bolt connecting hole of ribs post 2 outside backboard 1 with ribs post 2 binding face.
Acoustical board 5 is micropore ceramics composite plates of the three-dimensional netted pore structure with unordered connection, and micropore size is 0.5 to 100 micron.
Be circular arc or trapezoidal groove between spaced filler strip 51, between bottom portion of groove and backboard transverse ribs 11, have the second sluicing seam 9 being greater than 2 centimetres.
As shown in Fig. 1, Figure 15, illustrate sound barrier in figure and be arranged on side structure schematic diagram on railroad bridge 4, in this figure, railroad bridge 4 is frange plates of bridge, ribs post 2 and cast in situ concrete foundation 3 are cemented on railroad bridge 4, all built-in fittings are all covered consolidation by concrete, backboard 1 is fixed on ribs post 2, and extension, backboard 1 lower end 13 extends to the bridge end cover on railway basis.
As shown in Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6, by organizing backboard 1 and acoustical board 5 is fixed on ribs post 2 in figure more, Fig. 2 is the structural plan schematic diagram of one group of sound barrier, be made up of two ribs posts 2 and the many groups backboard 1 combined from the bottom to top and acoustical board 5, Fig. 5 is the cross-sectional structure schematic diagram of one group sound barrier, can also adopt the combining structure of Fig. 6 when one group of sound barrier is larger to length along bridge, namely backboard 1 laterally covers the ribs post 2 at two groups of intervals.
As Fig. 5, Fig. 6, Figure 11, Figure 12, Figure 13, shown in Figure 14, backboard 1 is connected and fixed by bonding and bolt with ribs post 2, ribs post 2 and backboard 1 connecting hole is represented in Figure 11, it is the rib column bolt perforation 22 of back taper in the outside of binding face, illustrate backboard 1 in Figure 12 and be connected and fixed state with ribs post 2, be the backboard bolt penetration hole 12 of back taper equally in the outside of backboard 1 binding face, inverted cone-shaped structure is unlikely be under vibrating conditions conducive to the plugging material sclerosis of filling after bolt is fixed after to come off from bolt hole, reach reliable plugging effect, extend the connecting elements life-span.
As shown in Fig. 4, Fig. 7, Fig. 8, Fig. 9, Figure 10, the present invention adopts surface to have cross-sectional sizes identical and the W shape wedge 52 of continuous transverse setting, the back side has interval vertical direction to arrange acoustical board 5 structure of filler strip 51, Fig. 7 illustrates acoustical board 5 structure, Fig. 9 and Figure 10 is the cross section structure of acoustical board, wherein Fig. 9 is formed by spaced filler strip 51 is trapezoidal groove, and what Figure 10 was formed is circular groove, in order to increase the intensity of sound barrier further; Matching grooves as shown in Figure 8 between acoustical board 5 filler strip 51 of the present invention and backboard 1 liang of transverse ribs 11 is fixed, catchment to prevent sound barrier, the depth of groove that filler strip 51 is formed is greater than filler strip height, when acoustical board 5 is fixed with backboard 1, the the second sluicing seam 9 being greater than 2 centimetres is had between transverse ribs 11 and acoustical board 5, backboard 1 and the acoustical board 5 of many groups lateral arrangement have analog structure, and the rainwater in sound barrier cavity 7 can be discharged smoothly.
As shown in figure 15, acoustical board 5 least significant end and cast in situ concrete foundation 3 have between plane the first sluicing seam 8 being greater than 2 centimetres, rainwater in sound barrier cavity 7 is discharged by the first sluicing seam 8 after falling to lower end by the second sluicing seam 9, in sound barrier, do not have any catchmenting.In Figure 15, dotted portion illustrates embedded ribs in each structural member and syndeton thereof.
As shown in Fig. 2, Fig. 4, Fig. 5, Fig. 6, in figure, acoustical board 5 is laterally also by connecting bolt 6 and encapsulating is bonding is connected and fixed with ribs post 2.
Claims (10)
1. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration, comprise downline and continue spaced ribs post, between every two ribs posts, side, railways train operation face is acoustical board, side, the back side is backboard, it is characterized in that: described ribs post lower end is had rib post built-in fitting to be connected with railroad bridge built-in fitting and covered completely and consolidation by built-in fitting by cast in situ concrete foundation; Described backboard and ribs post are bolted to fix and adopt waterproofing materials to be clogged by bolt hole and cover, and are applied bonding agent and are fixed between described acoustical board and backboard by connecting pin.
2. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 1, it is characterized in that: described acoustical board surface has cross-sectional sizes identical and the W shape wedge of continuous transverse setting, the filler strip that the acoustical board back side has interval vertical direction to arrange.
3. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 2, is characterized in that: the sound absorption cavity having filler strip to support between described backboard and acoustical board to be formed.
4. super high strength concrete-micropore ceramics the compound sound barrier of the high speed railway box girder integration according to Claims 2 or 3, it is characterized in that: described backboard has transverse ribs, backboard lower end has extension to extend ribs post bottom and by the bridge end cover on railway basis.
5. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 4, is characterized in that: the matching grooves between described filler strip and backboard two transverse ribs is fixed.
6. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 5, is characterized in that: described acoustical board least significant end and cast in situ concrete foundation have between plane be greater than 2 centimetres first sluice and stitch.
7. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 5, it is characterized in that: the sound barrier that described ribs post and acoustical board and backboard are formed is cambered surface, the concave direction of cambered surface is towards railways train operation face, and cambered surface radius is 12 ± 0.5 meters.
8. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 5, is characterized in that: the bolt connecting hole of described backboard and ribs post is back taper outside backboard and ribs post binding face.
9. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 5, it is characterized in that: described acoustical board is the micropore ceramics composite plate of the three-dimensional netted pore structure with unordered connection, and micropore size is 0.5 to 100 micron.
10. super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration according to claim 5, it is characterized in that: be circular arc or trapezoidal groove between described spaced filler strip, have between bottom portion of groove and backboard transverse ribs be greater than 2 centimetres second sluice and stitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133370.7A CN104674688A (en) | 2015-03-25 | 2015-03-25 | Integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of high-speed railway box beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510133370.7A CN104674688A (en) | 2015-03-25 | 2015-03-25 | Integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of high-speed railway box beam |
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| CN104674688A true CN104674688A (en) | 2015-06-03 |
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| CN201510133370.7A Pending CN104674688A (en) | 2015-03-25 | 2015-03-25 | Integral ultra-high strength concrete-micro-porous ceramic composite sound barrier of high-speed railway box beam |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221724A (en) * | 2018-02-01 | 2018-06-29 | 中纬建设工程有限公司 | A kind of municipal administration noise reduction isolation strip |
| CN112127291A (en) * | 2020-09-04 | 2020-12-25 | 成都中弘轨道交通环保产业股份有限公司 | Sound barrier acoustic baffle mounting structure |
| CN114934459A (en) * | 2022-05-16 | 2022-08-23 | 中海环境科技(上海）股份有限公司 | Sound barrier structure for reducing noise of rail transit secondary structure and design method |
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| CN103669233A (en) * | 2013-11-11 | 2014-03-26 | 陈松 | Super-microporous ceramic sound absorption barrier and manufacturing method thereof |
| CN203530871U (en) * | 2013-10-28 | 2014-04-09 | 陈松 | Sound barrier fixing structure |
| CN204510048U (en) * | 2015-03-25 | 2015-07-29 | 成都中弘轨道交通环保产业股份有限公司 | Super high strength concrete-micropore ceramics the compound sound barrier of high speed railway box girder integration |
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| DE19514458A1 (en) * | 1995-04-19 | 1996-10-24 | Bernd Kopf | Sound absorbing wall element for noise protection walls |
| WO2009155627A1 (en) * | 2008-06-27 | 2009-12-30 | Wolfgang Brunbauer | Noise protection wall |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108221724A (en) * | 2018-02-01 | 2018-06-29 | 中纬建设工程有限公司 | A kind of municipal administration noise reduction isolation strip |
| CN112127291A (en) * | 2020-09-04 | 2020-12-25 | 成都中弘轨道交通环保产业股份有限公司 | Sound barrier acoustic baffle mounting structure |
| CN114934459A (en) * | 2022-05-16 | 2022-08-23 | 中海环境科技(上海）股份有限公司 | Sound barrier structure for reducing noise of rail transit secondary structure and design method |
| CN114934459B (en) * | 2022-05-16 | 2023-09-01 | 中海环境科技(上海）股份有限公司 | Sound barrier structure for reducing noise of secondary structure of rail transit and design method |
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