CN201943017U - Prestress concrete high-speed railway sound barrier sound absorption insertion plate - Google Patents
Prestress concrete high-speed railway sound barrier sound absorption insertion plate Download PDFInfo
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- CN201943017U CN201943017U CN2010206929979U CN201020692997U CN201943017U CN 201943017 U CN201943017 U CN 201943017U CN 2010206929979 U CN2010206929979 U CN 2010206929979U CN 201020692997 U CN201020692997 U CN 201020692997U CN 201943017 U CN201943017 U CN 201943017U
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Abstract
The utility model relates to a prestress concrete high-speed railway sound barrier sound absorption insertion plate, which comprises a precast concrete unit insertion plate and a sound absorption panel, wherein both the precast concrete unit insertion plate and the sound absorption panel are rectangular components, the sound absorption panel is connected with the precast concrete unit insertion plate through screw bolts, the left side and the right side of the precast concrete unit insertion plate are respectively provided with thickened reinforcing steel bars, the top and the bottom of the precast concrete unit insertion plate are respectively provided with thickened rib beams, the thickened rib beams arranged at the bottom of the precast concrete unit insertion plate are provided with grooves, and horizontal and vertical prestress steel bars are arranged in the precast concrete unit insertion plate. The prestress concrete high-speed railway sound barrier sound absorption insertion plate can effectively resist the long-time effect of the natural typhoon load and the fluctuating wind load of high-speed trains with the highest speed of 380 to 400 km per hour and has the advantages of good anti-fatigue performance, durability and obvious noise reduction effect. The cost for manufacturing the prestress concrete high-speed railway sound barrier sound absorption insertion plate is low, and the installation and the replacement are convenient and fast.
Description
Technical field
The utility model relates to the member of using in a kind of railway engineering, especially relates to a kind of sound barrier sound absorption plate of isolating the high-speed railway noise.
Background technology
In recent years, the China Railway High-speed development is swift and violent, and in September, 2010, along with the Shanghai-Hangzhou high ferro is opened operation, the high-speed railway operation mileage that China has put into effect reaches 7055 kilometers, ranks first in the world.Comprise about 40 of Line for Passenger Transportation that Beijing-Shanghai High-Speed Railway etc. has put into operation and inter-city passenger rail project in addition, and will reach 1.3 ten thousand km, surpass other various countries' summations in high-speed railways operation mileages in 2012.At present, China become that the high speed rail system technology is the most complete in the world, integration capability is the strongest, the operation country that mileage is the longest, the speed of service is the highest, building scale is maximum.In the fast development of high-speed railway mileage, the overall trip speed of train was walked the prostatitis in the world equally, and domestic CR H3 type " Harmony " motor train unit train had once been created world's railway operation F-Zero record of 394.3 kilometers on the Beijing-Tianjin inter-city high ferro on June 24th, 2008.On September 28th, 2010, China homemade " Harmony " CRH380A a new generation EMU is tried out from Hangzhou to the Shanghai Hongqiao the way in the Shanghai-Hangzhou high ferro, and F-Zero reaches 416.6 kilometers, refreshes world's railway operation test once more the most at a high speed.Therefore China is expected to break through the highest overall trip speed of present 350km/h, and rate is introduced into 380km/h even reaches the high speed of 400km/h.
Sound barrier is one of control railroad train running noises major measure that surrounding environment is polluted, at home and abroad extensively adopts.Frankfurt, Germany-Cologne circuit is when train operation speed 250km/h～330km/h, the fluctuating wind pressure that bullet train produces causes the aluminium alloys unit plate fracture of its metal upright post board plug type sound barrier, steel post and the connecting bolt on basis are loosening etc., and the result makes this circuit sound barrier have to remove rebuild completely.In addition, still do not have the high speed railway sound barrier that speed per hour is higher than 350km/h at present, as seen design suitable high speed to 400km/h, and the sound barrier of function admirable good endurance has become the difficult problem in the current international high speed railway construction.
Along with the raising of bullet train speed, the fluctuating wind pressure that imposes on sound barrier during the train high-speed cruising is also increasing, and the pulsating wind pressure peak value is directly proportional with velocity squared substantially, and ripple frequency is directly proportional with speed substantially.Design at present with use still needleless to the sound barrier of the above speed per hour of 350km/h, secondly present design with use the still unresolved good high-speed railway train fluctuating wind pressure of sound barrier dynamically with tired stressed problem.
In the prior art, high speed railway sound barrier commonly used at present mainly contains metal upright post board plug type sound barrier, monolithic concrete sound barrier.Metal unit plates such as the former adopts H shaped steel columns more, the complexed metal aluminium alloys and transparent sound barrier are suitable for.The latter comprises ordinary concrete integral type sound barrier and pre-stress integral formula sound barrier.From great, crack resistance is poor for the ordinary concrete sound barrier, and fatigue durability is poor, is connected weakness with roadbed or bridge, construction inconvenience, not easy-maintaining and replacing after the generation disease.Equally from great, fatigue durability is poor for prestressed concrete sound barrier, is connected weakness with roadbed or bridge, and construction is complicated, not easy-maintaining and replacing after the generation disease.For metal upright post board plug type sound barrier, metal backing commonly used can not adapt to the dynamically effect repeatedly of 250km/h bullet train fluctuating wind pressure, fatigue failure takes place easily, metal backing takes the lead in occurring fatigue crack near the both sides of middle part and insertion, develop into waveform accordion cracking at last and damage.Now Yan Fa glass fiber Reinforced Plastics unit plate (GRP) with ribbing has good mechanical performance and elastic deformability, from heavy and light, and excellent noise reduction effect, but its shortcoming is the expense too expensive, inconvenience is promoted the use of.
The utility model content
For overcoming existing high-speed railway board plug type sound barrier technical deficiency, the utility model provides that a kind of safety of structure height, endurance, durability are good, easy construction, be convenient to change, prestressed concrete high speed railway sound barrier sound absorption plate that cost is low.
The utility model adopts following technical scheme:
Prestressed concrete high speed railway sound barrier sound absorption plate comprises precast concrete unit plate, sound absorption panel, and precast concrete unit plate, sound absorption panel are rectangular elements, and the sound absorption panel is connected with precast concrete unit plate by bolt; It is characterized in that: the plate left and right sides, precast concrete unit is equipped with thickening rib post, and top and bottom are respectively equipped with the thickening girt strip, and the thickening girt strip in its bottom has groove, is provided with level, vertical prestressing reinforcing bar in the precast concrete unit plate.
Preferably, precast concrete unit plate is provided with the double-layer horizontal prestressed reinforcement in the thickening girt strip, be provided with the horizontal center of individual layer prestressed reinforcement at non-reinforcement; Precast concrete unit plate is provided with double-deck vertical prestressing reinforcing bar in its both sides thickening rib post, be provided with the vertical center of individual layer prestressed reinforcement at non-reinforcement.
Preferably, precast concrete unit plate forms the vertical triangle stalk of transition armpit at both sides thickening rib post and non-thickening place, and precast concrete unit plate forms the vertical triangle stalk of transition armpit in the thickening girt strip and non-thickening place of its top, bottom.
Preferably, precast concrete unit plate with adopt being connected of sound absorption panel the pre-embedded bolt hole again bolt fix; The pre-embedded bolt hole is that a nut constitutes, only the nut side open is embedded in the concrete unit plate by steel pipe and steel plate welding.
Preferably, precast concrete unit plate is used for connecting the connector of lifting in top board pre-embedded bolt hole; The pre-embedded bolt hole is that a nut constitutes, only the nut side open is embedded in the concrete unit plate by steel pipe and steel plate welding.
Preferably, concrete adopts C50 and above rank, and concrete adopts the rubble coarse aggregate, and the rubble maximum size of coarse aggregate is not more than 2.0cm.
Preferably, sound barrier plate height is the above 2.05m of rail top face, and the width of sound barrier plate is 1.95m or 1.27m.
Preferably, the non-reinforcement of prestressed concrete unit plate is that 8cm is thick, and the thickening girt strip of prestressed concrete unit plate, thickening rib post are being of a size of 16cm, 12cm or 10cm perpendicular to prestressed concrete unit plate in-plane.
Preferably, the sound absorption panel adopts 5cm solid cement base sound absorbing plate.
Preferably, presstressed reinforcing steel is selected steel wire, steel strand or fining twisted steel for use.
The job practices of prestressed concrete high speed railway sound barrier sound absorption plate adopts pre-tensioning system or post stretching, it is characterized in that:
Pre-tensioning system work progress: (1), strict accurately blanking plain bars; (2), the colligation plain bars forms cage of reinforcement; (3), adjustment plain bars size and position, and welding is fixing, is welded to connect all kinds of built-in fittings such as prepared screw-bolt hole and shipment fastener simultaneously; (4), shuttering and cage of reinforcement gone into template between stretching bed seat; (5), calculate compressor wire cutting length and blanking; (6), compressor wire passes the reinforcing bar firmware and is fixed on and cooperates stretch-draw on the stretching bed seat; (7), template envelope mould; (8), fluid concrete and maintenance are to design strength; (9), form removal; (10), put tension prestress; (11), handle the compressor wire termination; (12), envelope is mended and is reserved the stretch-draw hole and carry out surfacing;
Post-tensioned construction process: (1), calculating compressor wire cutting length and blanking; (2), the head of rammer steel wire one end; (3), put on ground tackle; (4), put on bellows; (5), put on anchor plate; (6), strict accurately blanking plain bars; (7), the colligation plain bars forms cage of reinforcement; (8), adjustment plain bars size and position, and welding is fixing, is welded to connect all kinds of built-in fittings simultaneously as reserving the empty and shipment fastener of bolt; (9), shuttering and cage of reinforcement gone into template; (10), template envelope mould; (11), fluid concrete and maintenance are to design strength; (12), form removal; (13), the stretch-draw prestressing force steel wire, and anchoring; (14), duct grouting; (15), envelope is mended and is reserved the stretch-draw hole.
Compared with prior art, the utlity model has following advantage:
Apply vertical, horizontal two dimension prestressing on the concrete plate, effectively to the long term of 400km/h train wind loads and natural typhoon load, tensile stress does not appear in precast concrete unit plate, effectively prevents the cracking of plate at a high speed in opposing.The rigidity of prestressed concrete plate is big, has good anti-fatigue performance, endurance quality.Plate installed inside acoustical board can effectively absorb railroad noise in the precast concrete unit, cooperates the good precast concrete unit plate of defening effect, and noise reduction is remarkable.Make at the bottom of the prestressed concrete sound barrier sound absorption plate expense, it is convenient that installation is changed.
The utility model adopts the precast prestressed concrete unit plate, but large-scale plant is prefabricated, and it is convenient to construct, prestressed slab structural entity good rigidity, good endurance.Top, bottom, dual-side portion at plate establish the thickening rib, are convenient to installation and rationally stressed, and the stalk armpit of setting effectively eliminates stress concentrated.The rubber pad (as the isolates sound device) of prestressed concrete plate bottom band groove fit band projection effectively insulates against sound and fixing plate bottom.In the layout of prestressed reinforcement, adopt double-layer prestressed reinforcing bar at the thickening flank, all the other positions adopt individual layer center prestressed reinforcement to arrange, effectively resist the malleation and the negative pressure effect of train fluctuating wind pressure.Except that prestressed reinforcement, also arrange double-deck plain bars net, and add plain bars, improve anti-crack ability, anti-fatigue performance and the endurance quality of plate at the thickening flank.Acoustical board can adopt many suctions sound material such as wood cement concrete, perlite porous absorption material etc. and the 5.0cm heavy-gauge sheeting that cement-based material is composited, and by the effectively absorption of noise of panel that absorbs sound, effectively improves defening effect.The sound absorption panel is connected and fixed by pre-buried bolt and concrete plate.Can also can install in the scene in factory's assembled in advance, it is convenient to construct.Precast concrete unit plate can be applied to transportation, lifting by being embedded in the bolt hole of top board.The plate sound insulation of precast concrete unit, and cooperate the acoustical board noise reduction, make structural mechanical property and noise reduction reach optimization.
Description of drawings
Fig. 1 is a prestressed concrete high speed railway sound barrier sound absorption plate structural representation of the present utility model;
Fig. 2 A is an A-A generalized section among Fig. 1;
Fig. 2 B is an A-A section prestressed reinforcement schematic diagram among Fig. 1;
Fig. 2 C is an A-A section nonprestressed reinforcement schematic diagram among Fig. 1;
Fig. 3 A is a B-B generalized section among Fig. 1;
Fig. 3 B is a B-B section prestressed reinforcement schematic diagram among Fig. 1;
Fig. 3 C is a B-B section nonprestressed reinforcement schematic diagram among Fig. 1;
Fig. 4 A is a C-C generalized section among Fig. 1;
Fig. 4 B is a C-C section prestressed reinforcement schematic diagram among Fig. 1;
Fig. 4 C is a C-C section nonprestressed reinforcement schematic diagram among Fig. 1;
Fig. 5 A is a D-D generalized section among Fig. 1;
Fig. 5 B is a D-D section prestressed reinforcement schematic diagram among Fig. 1;
Fig. 5 C is a D-D section nonprestressed reinforcement schematic diagram among Fig. 1;
Fig. 6 is a sound absorption panel construction schematic diagram;
Fig. 7 is a sound absorption panel E-E cross-sectional view among Fig. 6;
Fig. 8 is a sound absorption panel F-F cross-sectional view among Fig. 6;
Fig. 9 is the schematic diagram of sound absorption panel with prestressed concrete plate connecting bolt built-in fitting and screw;
Figure 10 is the bolt hole schematic top plan view that prestressed concrete unit plate is embedded in top board;
Figure 11 is the bolt hole generalized section that prestressed concrete unit plate is embedded in top board;
Among the figure: 1, prestressed concrete unit plate, 2, the sound absorption panel, 5, sound absorption panel connecting bolt, 7, the pre-embedded bolt hole of pre-buried lifting, 11, vertically thicken the rib post, 12, the thickening girt strip, 13, have a thickening girt strip of groove, 31, the horizontal prestressed reinforcement of individual layer, 32, double-layer horizontal prestressed reinforcement, 41, individual layer vertical prestressing reinforcing bar, 42, double-deck vertical prestressing reinforcing bar, 61, vertical triangle stalk armpit, 62, horizontal triangle stalk armpit.
The specific embodiment
As shown in Figure 1, prestressed concrete high speed railway sound barrier sound absorption plate comprises: precast prestressed concrete unit plate 1, sound absorption panel 2, sound absorption panel 2 is installed on the precast prestressed concrete unit plate 1 by sound absorption panel connecting bolt 5.Precast prestressed concrete unit plate 1 is a rectangular configuration, the thickening rib post 11 that precast prestressed concrete unit plate 1 left and right sides is provided with, precast prestressed concrete unit plate 1 is provided with thickening girt strip 12 at its top, precast prestressed concrete unit plate 1 is the thickening girt strip 13 that has groove in its bottom.Precast prestressed concrete unit plate 1 is provided with double-layer horizontal prestressed reinforcement 31 at the thickening girt strip at its top, the thickening girt strip that the bottom has groove, adds Mangnolia officinalis and partly is provided with the horizontal prestressed reinforcement 32 of individual layer non-; Precast prestressed concrete unit plate 1 is provided with double-deck vertical prestressing reinforcing bar 41 at its both sides thickening rib post, adds Mangnolia officinalis and partly is provided with vertical center prestressed reinforcement 42 non-.The prestressing force placement technique, the basic position of center arrangement of adopting is to tackle the situation that the positive negative pressure of pulsating wind pressure is more or less the same, the quantity of prestressed reinforcement, the design of stretching force, make that under positive and negative pulsating wind pressure effect, prestressing force plate both sides all are in pressured state, and be in the elastic force balance state, thereby structure does not ftracture, and has favorable durability and anti-fatigue performance.The vertical triangle stalk of the transition armpit 61 that the precast prestressed concrete unit plate forms in both sides thickening rib post 11 and non-thickening place, precast prestressed concrete unit plate 1 is at the thickening girt strip at its top, the groove thickening girt strip of bottom and the horizontal triangle stalk of the transition armpit 62 that non-thickening place forms.Precast prestressed concrete unit plate 1 with adopt being connected of sound absorption panel 2 pre-embedded bolt hole 5 again bolt fix.Precast concrete unit plate is used for connecting the connector of lifting in top board pre-embedded bolt hole 7.The sound barrier plate highly is the above 2.05m of rail top face generally, can suitably adjust according to actual conditions; To be the noise barrier structure force request require the result that combines with sound insulation and noise reducing in the design of precast prestressed concrete unit plate geometrical scale.It is to reduce deadweight under the condition that satisfies train wind loads and natural wind load as far as possible that structure stress requires, and is convenient to construction and installation etc.The utility model is chosen the thick precast prestressed concrete plate of 8cm by the labor optimization of finite element software to geometric parameter, and it is minimum to make the deadweight of sound barrier reduce to, and significantly reduces manufacturing, transportation, installation cost.Between 350km/h～400km/h, the prestressed concrete plate is that 8cm is thick for the train F-Zero, thickeies rib all around and thickens to 16cm; Between 350km/h～400km/h, the prestressed concrete plate is that 8cm is thick for the train F-Zero, thickeies rib all around and thickens to 12cm; Be no more than 350km/h for the train F-Zero,, consider the situation of typhoon load to the 50m/s maximum wind velocity, the prestressed concrete plate is that 8cm is thick, thickeies rib all around and thickens to 12cm; Be no more than 350km/h for the train F-Zero, the prestressed concrete plate is that 8cm is thick, thickeies rib all around and thickens to 10cm; Be no more than 250km/h for the train F-Zero, do not consider the typhoon load, the prestressed concrete plate is that 8cm is thick, thickeies rib all around and thickens to 10cm; The width of sound barrier plate, normal width is 1.95m, the end on bridge can be adjusted into 1.27m according to actual conditions and be fit to 32m, 24m, 20m standard beam.And can be according to different train speeds and natural wind loading condition and specifically adjust suitable width.Concrete adopts C50 and above rank, adopts high-intensity rubble coarse aggregate, and maximum particle diameter is not more than 2.0cm.The sound absorption panel is optional with cement Quito hole material such as wood cement concrete, perlite porous absorption material etc., mineral wool sound absorption board, polyester fiber acoustical board etc.Sound absorption material is selected materials such as the centrifugally glass-wool, rock wool of high NRC for use as far as possible.Prestressing force adopts pre-tensioning system the bonding reinforcing bar to be arranged, the optional steel wire of the kind of presstressed reinforcing steel, steel strand, fining twisted steel etc.; Also can adopt post stretching, relevant ground tackle can adopt small-sized heading ground tackle, improved Extrusion anchor ground tackle.
The concrete work progress of above-mentioned prestressed concrete high speed railway sound barrier sound absorption plate can be as follows:
Pre-tensioning system work progress: (1) strict accurately blanking plain bars; (2) the colligation plain bars forms cage of reinforcement; (3) adjustment plain bars size and position, and welding is fixing, is welded to connect all kinds of built-in fittings such as prepared screw-bolt hole and shipment fastener simultaneously; (4) shuttering and cage of reinforcement gone into template between stretching bed seat; (5) calculate compressor wire cutting length and blanking; (6) compressor wire passes the reinforcing bar firmware and is fixed on and cooperates stretch-draw on the stretching bed seat; (7) template envelope mould; (8) fluid concrete and maintenance are to design strength; (9) form removal; (10) put tension prestress; (11) handle the compressor wire termination; (12) envelope is mended and is reserved the stretch-draw hole and carry out surfacing.
The post-tensioned construction process: (1) calculates compressor wire cutting length and blanking; (2) head of rammer steel wire one end; (3) put on ground tackle; (4) put on bellows; (5) put on anchor plate; (6) strict accurately blanking plain bars; (7) the colligation plain bars forms cage of reinforcement; (8) adjustment plain bars size and position, and welding is fixing, is welded to connect all kinds of built-in fittings simultaneously as reserving the empty and shipment fastener of bolt; (9) shuttering and cage of reinforcement gone into template; (10) template envelope mould; (11) fluid concrete and maintenance are to design strength; (12) form removal; (13) stretch-draw prestressing force steel wire, and anchoring; (14) duct grouting; (15) envelope is mended and is reserved the stretch-draw hole.
In the installation, the bolt of lifting fastener is screwed in the pre-embedded bolt hole that is embedded in the plate top and lifts.
Claims (10)
1. a prestressed concrete high speed railway sound barrier sound absorption plate comprises precast concrete unit plate, sound absorption panel, and precast concrete unit plate, sound absorption panel are rectangular elements, and the sound absorption panel is connected with precast concrete unit plate by bolt; It is characterized in that: the plate left and right sides, precast concrete unit is equipped with thickening rib post, and top and bottom are respectively equipped with the thickening girt strip, and the thickening girt strip in its bottom has groove, is provided with level, vertical prestressing reinforcing bar in the precast concrete unit plate.
2. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: precast concrete unit plate is provided with the double-layer horizontal prestressed reinforcement in the thickening girt strip, be provided with the horizontal center of individual layer prestressed reinforcement at non-reinforcement; Precast concrete unit plate is provided with double-deck vertical prestressing reinforcing bar in its both sides thickening rib post, be provided with the vertical center of individual layer prestressed reinforcement at non-reinforcement.
3. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: precast concrete unit plate forms the vertical triangle stalk of transition armpit at both sides thickening rib post and non-thickening place, and precast concrete unit plate forms the vertical triangle stalk of transition armpit in the thickening girt strip and non-thickening place of its top, bottom.
4. prestressed concrete high speed railway sound barrier according to claim 1 sound absorption plate is characterized in that: precast concrete unit plate and sound absorption panel be connected employing pre-embedded bolt hole again bolt fix; The pre-embedded bolt hole is that a nut constitutes, only the nut side open is embedded in the concrete unit plate by steel pipe and steel plate welding.
5. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: precast concrete unit plate is used for connecting the connector of lifting in top board pre-embedded bolt hole; The pre-embedded bolt hole is that a nut constitutes, only the nut side open is embedded in the concrete unit plate by steel pipe and steel plate welding.
6. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: concrete adopts C50 and above rank, and concrete adopts the rubble coarse aggregate, and the rubble maximum size of coarse aggregate is not more than 2.0cm.
7. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: sound barrier plate height is the above 2.05m of rail top face, and the width of sound barrier plate is 1.95m or 1.27m.
8. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: the non-reinforcement of prestressed concrete unit plate is that 8cm is thick, and the thickening girt strip of prestressed concrete unit plate, thickening rib post are being of a size of 16cm, 12cm or 10cm perpendicular to prestressed concrete unit plate in-plane.
9. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1 is characterized in that: the sound absorption panel adopts 5cm solid cement base sound absorbing plate.
10. prestressed concrete high speed railway sound barrier sound absorption plate according to claim 1, it is characterized in that: presstressed reinforcing steel is selected steel wire, steel strand or fining twisted steel for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206929979U CN201943017U (en) | 2010-12-31 | 2010-12-31 | Prestress concrete high-speed railway sound barrier sound absorption insertion plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206929979U CN201943017U (en) | 2010-12-31 | 2010-12-31 | Prestress concrete high-speed railway sound barrier sound absorption insertion plate |
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| CN201943017U true CN201943017U (en) | 2011-08-24 |
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| CN2010206929979U Expired - Fee Related CN201943017U (en) | 2010-12-31 | 2010-12-31 | Prestress concrete high-speed railway sound barrier sound absorption insertion plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102345A (en) * | 2010-12-31 | 2011-06-22 | 中铁二院工程集团有限责任公司 | Prestress concrete noise barrier sound absorption inserting plate for high speed railway |
| CN103556580A (en) * | 2013-11-15 | 2014-02-05 | 铁道第三勘察设计院集团有限公司 | Ribbed prestressed concrete plate type noise barrier unit plate |
-
2010
- 2010-12-31 CN CN2010206929979U patent/CN201943017U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102345A (en) * | 2010-12-31 | 2011-06-22 | 中铁二院工程集团有限责任公司 | Prestress concrete noise barrier sound absorption inserting plate for high speed railway |
| CN102102345B (en) * | 2010-12-31 | 2014-03-12 | 中铁二院工程集团有限责任公司 | Prestress concrete noise barrier sound absorption inserting plate for high speed railway |
| CN103556580A (en) * | 2013-11-15 | 2014-02-05 | 铁道第三勘察设计院集团有限公司 | Ribbed prestressed concrete plate type noise barrier unit plate |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110824 Termination date: 20151231 |
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| EXPY | Termination of patent right or utility model |