CN102102345B - Prestress concrete noise barrier sound absorption inserting plate for high speed railway - Google Patents
Prestress concrete noise barrier sound absorption inserting plate for high speed railway Download PDFInfo
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- CN102102345B CN102102345B CN201010617009.9A CN201010617009A CN102102345B CN 102102345 B CN102102345 B CN 102102345B CN 201010617009 A CN201010617009 A CN 201010617009A CN 102102345 B CN102102345 B CN 102102345B
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Abstract
The invention relates to a prestress concrete noise barrier sound absorption inserting plate for a high speed railway. The prestress concrete noise barrier sound absorption inserting plate for the high speed railway comprises a prefabricated concrete unit inserting plate and a sound absorption panel which are rectangular structural members; the sound absorption panel is connected with the prefabricated concrete unit inserting plate through a bolt; left and right sides of the prefabricated concrete unit inserting plate are provided with thickened rib columns, and the top and the bottom of the prefabricated concrete unit inserting plate are respectively provided with thickened rib beams; a groove is formed on the thickened rib beam at the bottom of the prefabricated concrete unit inserting plate; and horizontal and vertical prestress reinforcing steel bars are arranged in the prefabricated concrete unit inserting plate. The prestress concrete noise barrier sound absorption inserting plate for the high speed railway can effectively resist long-term action of pulse air load and natural typhoon load of the high speed railway of which the highest speed is 380 to 400 kilometers per hour, has good fatigue resistance performance, obvious lasting quality and remarkable noise-reducing effect; and the cost for manufacturing the prestress concrete noise barrier sound absorption inserting plate is low, and the prestress concrete noise barrier sound absorption inserting plate is convenient to install and exchange.
Description
Technical field
The present invention relates to the member of applying in a kind of railway engineering, especially relate to a kind of sound barrier sound absorption plate of isolating high-speed railway noise.
Background technology
In recent years, China Railway High-speed development is swift and violent, and in September, 2010, along with 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.In addition comprise approximately 40 of Line for Passenger Transportation that Beijing-Shanghai High-Speed Railway etc. has put into operation and inter-city passenger rail projects, and will reach 1.3 ten thousand km in high-speed railways operation mileages in 2012, surpass other various countries' summations.At present, China has become the country that high speed rail system technology is the most complete in the world, integration capability is the strongest, operation 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 prostatitis in the same Zou of the overall trip speed world of train, domestic CR H3 type " Harmony " motor train unit train was once created world's railway operation F-Zero record of 394.3 kilometers in Beijing-Tianjin inter-city high ferro on June 24th, 2008.On September 28th, 2010, China domestic " Harmony " CRH380A a new generation EMU is tried out in way in Shanghai-Hangzhou high ferro from Hangzhou to Hongqiao in Shanghai, and F-Zero reaches 416.6 kilometers, again refreshes world's railway operation trial the most at a high speed.Therefore China is expected to break through the highest overall trip speed of current 350km/h, and rate is introduced into the high speed that 380km/h even reaches 400km/h.
Sound barrier is to prevent and treat railroad train running noises to one of major measure of surrounding environment pollution, at home and abroad extensively adopts.Frankfurt, Germany-Cologne circuit is when train operation speed 250km/h～330km/h, the impulsive 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 basic connecting bolt are loosening etc., and result makes this circuit sound barrier have to remove and rebuild completely.In addition, there is no at present speed per hour higher than the high speed railway sound barrier of 350km/h, design as seen and be applicable to high speed to 400km/h, and the sound barrier of function admirable good endurance has become the difficult problem in current international high speed railway construction.
Along with the raising of bullet train speed, the impulsive wind pressure that imposes on sound barrier during train high-speed cruising is also increasing, and pulsating wind pressure peak value is directly proportional to velocity squared substantially, and ripple frequency is directly proportional to speed substantially.Current design and application there is no the sound barrier for the above speed per hour of 350km/h, and secondly current design and application sound barrier are not yet resolved the dynamic and tired stressed problem of High Speed Railway Trains impulsive wind pressure.
In prior art, conventional high speed railway sound barrier mainly contains metal upright post board plug type sound barrier, monolithic concrete sound barrier at present.The former adopts H shaped steel columns more, and the metal unit plates such as complexed metal aluminium alloys and transparent sound barrier are applicable.The latter comprises ordinary concrete integral type sound barrier and pre-stress integral formula sound barrier.For ordinary concrete sound barrier, from great, crack resistance is poor, and fatigue durability is poor, is connected weakness with roadbed or bridge, construction inconvenience, not easy-maintaining and replacing after generation disease.For prestressed concrete sound barrier, equally from great, fatigue durability is poor, is connected weakness with roadbed or bridge, and construction is complicated, not easy-maintaining and replacing after generation disease.For metal upright post board plug type sound barrier, conventional metal backing can not adapt to the dynamic repeated action of 250km/h bullet train impulsive wind pressure, easily there is fatigue failure, metal backing takes the lead in occurring fatigue crack near the both sides of middle part and insertion, finally develops into waveform accordion cracking and damages.Now the glass fiber Reinforced Plastics unit plate (GRP) with ribbing of research and development has good mechanical property and elastic deformability, from heavy and light, and excellent noise reduction effect, but its shortcoming is expense too expensive, inconvenience is promoted the use of.
Summary of the invention
For overcoming existing high-speed railway board plug type sound barrier technical deficiency, the invention provides that a kind of safety of structure is high, endurance, durability are good, easy construction, be convenient to the prestressed concrete high-speed railway sound barrier sound absorption insertion plate changed, cost is low.
The present invention adopts following technical scheme:
Prestressed concrete high-speed railway sound barrier sound absorption insertion plate, comprises precast concrete unit plate, sound absorption panel, and precast concrete unit plate, sound absorption panel are rectangular elements, and 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 thickening girt strip, fluted at the thickening girt strip band of its bottom, are provided with level, vertical prestressing reinforcing bar in precast concrete unit plate.
Preferably, precast concrete unit plate is provided with double-layer horizontal prestressed reinforcement in thickening girt strip, at non-reinforcement, is provided with the horizontal center of individual layer prestressed reinforcement; Precast concrete unit plate is provided with double-deck vertical prestressing reinforcing bar in its both sides thickening rib post, at non-reinforcement, is provided with the vertical center of individual layer prestressed 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 thickening girt strip and non-thickening place of its top, bottom.
Preferably, precast concrete unit plate with adopt being connected of sound absorption panel pre-embedded bolt hole again bolt fix; Pre-embedded bolt hole is that a nut is formed, only nut side open is embedded in concrete unit plate by steel pipe and Plate Welding.
Preferably, precast concrete unit plate, in top board pre-embedded bolt hole, is used for connecting the connector of lifting; Pre-embedded bolt hole is that a nut is formed, only nut side open is embedded in concrete unit plate by steel pipe and Plate Welding.
Preferably, concrete adopts C50 and above rank, and concrete adopts rubble coarse aggregate, and 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, 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.
The construction method of prestressed concrete high-speed railway sound barrier sound absorption insertion 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), colligation plain bars forms cage of reinforcement; (3), adjustment plain bars size and position, and be welded and fixed, be welded to connect all kinds of built-in fittings as prepared screw-bolt hole and shipment fastener simultaneously; (4), shuttering cage of reinforcement is entered to template between stretching bed seat; (5), calculated prestressing force wire blanking length blanking; (6), compressor wire passes reinforcing bar firmware and is fixed on and coordinates stretch-draw on stretching bed seat; (7), template envelope mould; (8), fluid concrete maintenance are to design strength; (9), form removal; (10), put tension prestress; (11), process compressor wire termination; (12), envelope is mended reserved stretch-draw hole and is carried out surfacing;
Post-tensioned construction process: (1), calculated prestressing force wire blanking length blanking; (2), the head of upsetting 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), colligation plain bars forms cage of reinforcement; (8), adjustment plain bars size and position, and be welded and fixed, be welded to connect as empty in reserved bolt and the shipment fastener of all kinds of built-in fittings simultaneously; (9), shuttering cage of reinforcement is entered to template; (10), template envelope mould; (11), fluid concrete maintenance are to design strength; (12), form removal; (13), stretch-draw prestressing force steel wire, and anchoring; (14), duct grouting; (15), envelope is mended reserved stretch-draw hole.
Compared with prior art, tool of the present invention has the following advantages:
On concrete plate, apply vertical, horizontal two dimension prestressing, effectively opposing is at a high speed to the long term of 400km/h train wind loads and natural typhoon load, and tensile stress does not appear in precast concrete unit plate, effectively prevents the cracking of plate.The rigidity of prestressed concrete plate is large, has good anti-fatigue performance, endurance quality.In precast concrete unit plate inner side, acoustical board is installed and can be effectively absorbed railroad noise, coordinate the good precast concrete unit plate of defening effect, noise reduction is remarkable.At the bottom of making prestressed concrete sound barrier sound absorption plate expense, it is convenient that installation is changed.
The present invention adopts precast prestressed concrete unit plate, can large-scale plant prefabricated, construct convenient, and prestressed slab structural entity good rigidity, good endurance.Top, bottom, dual-side portion at plate establish thickening rib, are convenient to installation and rationally stressed, and the stalk armpit of setting effectively eliminates stress concentrated.Effectively insulate against sound and fixing insertion bottom with the rubber pad (as isolates sound device) of groove fit band projection in prestressed concrete plate bottom.In the layout of prestressed reinforcement, at thickening flank, adopt double-layer prestressed reinforcing bar, all the other positions adopt individual layer center prestressed reinforcement to arrange, effectively resist malleation and the negative pressure effect of train impulsive wind pressure.Except prestressed reinforcement, also arrange double-deck plain bars net, and add plain bars at thickening flank, improve anti-crack ability, anti-fatigue performance and the endurance quality of plate.The 5.0cm heavy-gauge sheeting that acoustical board can adopt how empty sound absorption material to be composited as wood cement concrete, perlite porous absorption material etc. and cement-based material, by the effectively absorption of noise of panel that absorbs sound, effectively improves defening effect.Sound absorption panel is connected and fixed by pre-buried bolt and concrete plate.Can also can install in scene in factory's assembled in advance, construct convenient.Precast concrete unit plate, by being embedded in the bolt hole of top board, can be applied to transportation, lifting.The plate sound insulation of precast concrete unit, and coordinate acoustical board noise reduction, make structural mechanical property and noise reduction reach optimization.
Accompanying drawing explanation
Fig. 1 is prestressed concrete high-speed railway sound barrier sound absorption insertion plate structural representation of the present invention;
Fig. 2 A is A-A generalized section in Fig. 1;
Fig. 2 B is A-A section prestressed reinforcement schematic diagram in Fig. 1;
Fig. 2 C is A-A section nonprestressed reinforcement schematic diagram in Fig. 1;
Fig. 3 A is B-B generalized section in Fig. 1;
Fig. 3 B is B-B section prestressed reinforcement schematic diagram in Fig. 1;
Fig. 3 C is B-B section nonprestressed reinforcement schematic diagram in Fig. 1;
Fig. 4 A is C-C generalized section in Fig. 1;
Fig. 4 B is C-C section prestressed reinforcement schematic diagram in Fig. 1;
Fig. 4 C is C-C section nonprestressed reinforcement schematic diagram in Fig. 1;
Fig. 5 A is D-D generalized section in Fig. 1;
Fig. 5 B is D-D section prestressed reinforcement schematic diagram in Fig. 1;
Fig. 5 C is D-D section nonprestressed reinforcement schematic diagram in Fig. 1;
Fig. 6 is sound absorption panel construction schematic diagram;
Fig. 7 is the panel E-E cross-sectional view that absorbs sound in Fig. 6;
Fig. 8 is the panel F-F cross-sectional view that absorbs sound in Fig. 6;
Fig. 9 is that sound absorption panel is with the schematic diagram of 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;
In figure: 1, prestressed concrete unit plate, 2, sound absorption panel, 5, sound absorption panel connecting bolt, 7, the pre-embedded bolt hole of pre-buried lifting, 11, vertically thicken rib post, 12, thickening girt strip, 13, be with reeded thickening girt strip, 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, transverse triangle stalk armpit.
The specific embodiment
As shown in Figure 1, prestressed concrete high-speed railway sound barrier sound absorption insertion plate comprises: precast prestressed concrete unit plate 1, sound absorption panel 2, sound absorption panel 2 is arranged on 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 at its top, be provided with thickening girt strip 12, precast prestressed concrete unit plate 1 its bottom for being with reeded thickening girt strip 13.Precast prestressed concrete unit plate 1 is with reeded thickening girt strip to be provided with double-layer horizontal prestressed reinforcement 31 in thickening girt strip, the bottom at its top, non-, add Mangnolia officinalis and is partly provided with the horizontal prestressed reinforcement 32 of individual layer; Precast prestressed concrete unit plate 1 is provided with double-deck vertical prestressing reinforcing bar 41 at its both sides thickening rib post, non-, add Mangnolia officinalis and is partly provided with vertical center prestressed reinforcement 42.Prestressing force placement technique, the situation that the position of basic employing center arrangement is more or less the same with reply pulsating wind pressure positive/negative-pressure, the quantity of prestressed reinforcement, the design of stretching force, make under positive and negative pulsating wind pressure effect, prestressing force plate both sides are all in pressured state, and in elastic force balance state, thereby structure does not ftracture, there is good durability and anti-fatigue performance.Precast prestressed concrete unit plate is thickeied the vertical triangle stalk of the transition armpit 61 of rib post 11 and non-thickening place formation in both sides, precast prestressed concrete unit plate 1 obstructs armpit 62 at the thickening girt strip at its top, the groove of bottom is thickeied the transition transverse triangle of girt strip and non-thickening place formation.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.Sound barrier plate is generally highly the above 2.05m of rail top face, can suitably adjust according to actual conditions; The design of precast prestressed concrete unit board plug structure physical dimension is that noise barrier structure force request requires with sound insulation and noise reducing the result combining.It is under the condition that meets train wind loads and natural wind load, to reduce as far as possible deadweight that structure stress requires, and constructability installation etc.The present invention optimizes the labor of geometric parameter by finite element software, chooses the thick precast prestressed concrete plate of 8cm, the deadweight of sound barrier is down to minimum, significantly reduces manufacture, transportation, installation cost.For train F-Zero, between 350km/h～400km/h, prestressed concrete plate is that 8cm is thick, and surrounding thickening rib thickens to 16cm; For train F-Zero, between 350km/h～400km/h, prestressed concrete plate is that 8cm is thick, and surrounding thickening rib thickens to 12cm; For train F-Zero, be no more than 350km/h,, consider that typhoon load is to the situation of 50m/s maximum wind velocity, prestressed concrete plate is that 8cm is thick, surrounding thickening rib thickens to 12cm; For train F-Zero, be no more than 350km/h, prestressed concrete plate is that 8cm is thick, and surrounding thickening rib thickens to 10cm; For train F-Zero, be no more than 250km/h, do not consider typhoon load, prestressed concrete plate is that 8cm is thick, and surrounding thickening rib 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 applicable 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.Optional hole, the cement Quito material of using of sound absorption panel is as wood cement concrete, perlite porous absorption material etc., mineral wool sound absorption board, polyester fiber acoustical board etc.Sound absorption material is selected the materials such as the centrifugally glass-wool, rock wool of high NRC as far as possible.Prestressing force adopts pre-tensioning system to have bonding reinforcing bar, the optional steel wire of 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 insertion plate can be as follows:
Pre-tensioning system work progress: (1) strict accurately blanking plain bars; (2) colligation plain bars forms cage of reinforcement; (3) adjustment plain bars size and position, and be welded and fixed, be welded to connect all kinds of built-in fittings as prepared screw-bolt hole and shipment fastener simultaneously; (4) shuttering cage of reinforcement is entered to template between stretching bed seat; (5) calculated prestressing force wire blanking length blanking; (6) compressor wire passes reinforcing bar firmware and is fixed on and coordinates stretch-draw on stretching bed seat; (7) template envelope mould; (8) fluid concrete maintenance are to design strength; (9) form removal; (10) put tension prestress; (11) process compressor wire termination; (12) envelope is mended reserved stretch-draw hole and is carried out surfacing.
Post-tensioned construction process: (1) calculated prestressing force wire blanking length blanking; (2) head of upsetting 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) colligation plain bars forms cage of reinforcement; (8) adjustment plain bars size and position, and be welded and fixed, be welded to connect all kinds of built-in fittings as reserved bolt sky and shipment fastener simultaneously; (9) shuttering cage of reinforcement is entered to template; (10) template envelope mould; (11) fluid concrete maintenance are to design strength; (12) form removal; (13) stretch-draw prestressing force steel wire, and anchoring; (14) duct grouting; (15) envelope is mended reserved stretch-draw hole.
In installation, the bolt of lifting fastener is screwed in the pre-embedded bolt hole that is embedded in plate top and is lifted.
Claims (7)
1. a prestressed concrete high-speed railway sound barrier sound absorption insertion plate, comprises precast concrete unit plate, sound absorption panel, and precast concrete unit plate, sound absorption panel are rectangular elements, and 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 thickening girt strip, fluted at the thickening girt strip band of its bottom, are provided with level, vertical prestressing reinforcing bar in precast concrete unit plate;
Precast concrete unit plate is provided with double-layer horizontal prestressed reinforcement in thickening girt strip, at non-reinforcement, is provided with the horizontal center of individual layer prestressed reinforcement; Precast concrete unit plate is provided with double-deck vertical prestressing reinforcing bar in its both sides thickening rib post, at non-reinforcement, is provided with the vertical center of individual layer prestressed reinforcement;
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 thickening girt strip and non-thickening place of its top, bottom;
Precast concrete unit plate with adopt being connected of sound absorption panel pre-embedded bolt hole again bolt fix; Pre-embedded bolt hole is that a nut is formed, only nut side open is embedded in concrete unit plate by steel pipe and Plate Welding.
2. prestressed concrete high-speed railway sound barrier sound absorption insertion plate according to claim 1, is characterized in that: precast concrete unit plate, in top board pre-embedded bolt hole, is used for connecting the connector of lifting; Pre-embedded bolt hole is that a nut is formed, only nut side open is embedded in concrete unit plate by steel pipe and Plate Welding.
3. prestressed concrete high-speed railway sound barrier sound absorption insertion plate according to claim 1 and 2, is characterized in that: concrete adopts C50 and above rank, and concrete adopts rubble coarse aggregate, and rubble maximum size of coarse aggregate is not more than 2.0cm.
4. prestressed concrete high-speed railway sound barrier sound absorption insertion plate according to claim 1 and 2, is characterized in that: the width of sound barrier plate is 1.95m or 1.27m.
5. prestressed concrete high-speed railway sound barrier sound absorption insertion plate according to claim 1 and 2, it is characterized in that: the non-reinforcement of prestressed concrete unit plate is that 8cm is thick, 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.
6. prestressed concrete high-speed railway sound barrier sound absorption insertion plate according to claim 1 and 2, is characterized in that: sound absorption panel adopts 5cm solid cement base sound absorbing plate.
7. prestressed concrete high-speed railway sound barrier sound absorption insertion plate according to claim 1 and 2, is characterized in that: presstressed reinforcing steel is selected steel wire, steel strand or fining twisted steel.
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| CN201010617009.9A CN102102345B (en) | 2010-12-31 | 2010-12-31 | Prestress concrete noise barrier sound absorption inserting plate for high speed railway |
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| CN201010617009.9A CN102102345B (en) | 2010-12-31 | 2010-12-31 | Prestress concrete noise barrier sound absorption inserting plate for high speed railway |
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| CN102102345B true CN102102345B (en) | 2014-03-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN105040604A (en) * | 2015-08-28 | 2015-11-11 | 招商局重庆交通科研设计院有限公司 | Composite sound absorption barrier |
| CN108894134A (en) * | 2018-07-17 | 2018-11-27 | 芜湖芬特勘测服务有限公司 | A kind of road residential area noise preventing device |
| CN110747767B (en) * | 2019-09-10 | 2021-03-12 | 北京天润康隆科技股份有限公司 | Integrated vertical non-metallic sound barrier system and installation method |
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