CN106948228A - A kind of plate-type ballastless track track plates fast replacement system and method - Google Patents
A kind of plate-type ballastless track track plates fast replacement system and method Download PDFInfo
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- CN106948228A CN106948228A CN201710344425.8A CN201710344425A CN106948228A CN 106948228 A CN106948228 A CN 106948228A CN 201710344425 A CN201710344425 A CN 201710344425A CN 106948228 A CN106948228 A CN 106948228A
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- track
- track plates
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- plate
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2204/00—Characteristics of the track and its foundations
- E01B2204/09—Ballastless systems
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- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
- Machines For Laying And Maintaining Railways (AREA)
Abstract
The invention discloses a kind of quick-replaceable system and method for ballastless track boards.The replacing system includes rail jacking apparatus, track plates jacking apparatus, track plates translating device, track plates placement tray, track plate transporting transfer device, track plates hanging device.The replacing options are rail jack-up certain altitudes on the track plates that will be changed, using across top by track plates jacking, recycle track plates translating device that track plates removal rail scope is placed on pallet, removed using hanging device by be changed track plates, and new-track plate is placed on pallet, new-track plate is moved into original track Board position in place, finally recovers the spacing and track plates and filling layers cementing of track plates.The present invention is changed for the track plates of high-speed railway maintenance, and this method is not in the case where damaging rail, using frock is light, simple to operate, efficiency of construction is high, is particularly suitable for the construction of high ferro Window time.
Description
Technical field
The invention belongs to high-speed railway plate type ballastless track maintenance and repair technology field, and in particular to a kind of plate-type ballastless rail
Road track plates fast replacement system and method.
Background technology
In recent years, high-speed railway is developed rapidly.In China, high-speed railway mainly uses ballastless track structure pattern, and plate
Formula ballastless track structure is most widely used, and construction scale is huge.Plate-type ballastless track mainly has three kinds of types of CRTS I, II, III etc.
Track structure pattern, mainly by rail, fastener, track plates, cement asphalt mortar（Or self-compacting concrete）Filling bed, concrete
Base（Or supporting course）Composition.Wherein, track plates are prefabricated reinforced concrete structure in factory, and installation positioning is carried out at the scene, are led to
Cross cement asphalt mortar（Or self-compacting concrete）Filling bed and non-fragment orbit concrete bed（Or supporting course）Connection, and pass through
Convex blocking platform, limited impression or longitudinally connected mode carry out spacing.
Plate-type ballastless track has ride comfort height, good stability, long service life, good endurance, maintenance load few etc.
Technical advantage.But, under complicated environmental condition and High-speed Train Loads, with the growth of active time, individual track plate meeting
There is partial deterioration situation, when deteriorating to a certain extent, it is necessary to be changed to individual track plate, to ensure non-fragment orbit
Security, stability and long durability.
Because high-speed railway operating line can only carry out maintenance work in Window time, it is impossible to use large scale equipment, and
Window time is limited, several tons of the track plates of weighing is changed, and also to recover circuit in same Window time, it is ensured that
Circuit normal operation, so track plates change one of technology hardly possible that technology is all the work of non-fragment orbit maintenance all the time
Topic.At present, the research for both at home and abroad track plates being changed with technology is still in the stage of fumbling.In China, a small number of non-fragment orbit maintenance dimensions
Department is repaiied to change bad damage track plates using the method for cut-out rail.On the one hand this method will cut off rail, then right
Rail is welded, and adds steel rail weld joint, to the damage of former seamless track steel rail than larger；On the other hand, use " is cut
Rail-welding-polishing-flaw detection " technics comparing is complicated, time-consuming longer, changes plate effect low and larger in skylight point construction risk.
The drawbacks of for cut-out rail replacement track plates, carry out both at home and abroad in the case of not cutting rail, in Window time
Experimental study to track plates Replacement procedure frock, but at present also in the pilot development stage, wherein, a kind of patent " board-like nothing
Tiny fragments of stone, coal, etc. track boards more changing device and replacing options（201310108682.3）" do not cut off rail there is provided one kind in the case of, plate
Formula ballastless track boards more changing device and replacing options, are not directed to new-track plate and former filling bed mortar（Or concrete）'s
Bond and recover or close-fitting state control technology, and in-site installation frock is more, it is heavier, it is not easy to Window time construction；And patent
" a kind of subway changes wooden handcart and changes trigger group comprising what the subway changed wooden handcart（201420251605.3）" used by equipment enlarging,
Complicate, equipment fault problem occur when skylight operation, it is difficult to handle, then directly affect the open-minded on schedule of circuit, in addition,
The patent is not suitable for the Replacement and Repair of high ferro railway ballastless track track plates also.Therefore, it is that basic solution never cuts off rail feelings
Under condition, the quick-replaceable recovery technique problem of board-like ballastless track boards in Window time, system formation is respectively suitable for
The plate-type ballastless track boards of CRTS I, II, III change technology, are this area urgent problems to be solved.
The content of the invention
The drawbacks of present invention in the case of cut-out rail to track plates for changing, when having invented one kind suitable for skylight
In implement, do not cut off rail in the case of method and frock that hurt track plates are changed.Invention quick construction, the reality
With reliability, cost economy, for realized in Window time the Replacement and Repair to hurt track plates provide it is a kind of it is quick, convenient,
Practical, economic new method.
The present invention realizes above-mentioned purpose using following technical scheme：
The present invention relates to a kind of quick-replaceable system and method for ballastless track boards.The replacing system includes rail jacking
Device, track plates jacking apparatus, track plates translating device, track sheet tray, track plate transporting transfer device, track plates hanging device.
The replacing options are rail jack-up certain altitudes on the track plates that will be changed, using across top by track plates jacking, then profit
Track plates removal rail scope is placed on pallet with track plates translating device, track plates will be changed using hanging device
Remove, and new-track plate is placed on pallet, new-track plate is moved into original track Board position in place, finally recovers track plates
Spacing and track plates and filling layers cementing.
A kind of ballastless track boards fast replacement system, the track plates jacking apparatus is by Multifunctional connecting component and machinery
Across top composition, Multifunctional connecting component is fixed on track plates using original track plate side bolt holes or fastening bolt hole, machinery across
Withstand on track plates both sides to be arranged symmetrically, 2 are respectively arranged per side.
A kind of ballastless track boards fast replacement system, the track plates translating device is by Multifunctional connecting component, heavy duty
Wheel and translation track groups are into heavy duty wheel is fixed on track plates by Multifunctional connecting component, in the heavy duty of direction of advance front end two
Wheel is set to deflecting roller, and the heavy duty wheel of rear end two is set to directional wheel, translation track correspondence heavy duty wheel lateral arrangement.
A kind of ballastless track boards fast replacement system, the track sheet tray is made up of four supports, each support
Arrangement for adjusting height is equipped with, pallet dimension meets the requirement of non-fragment orbit line-to-line boundary.
A kind of ballastless track boards fast replacement system, the Multifunctional connecting component utilizes original track plate side bolt holes
Or fastening bolt hole is installed, it is track plates jacking, heavy duty wheel is fixed and track plates lifting is utilized simultaneously.
A kind of ballastless track boards fast replacement system, the track plates translation track is by heavy duty wheel guide groove, supporting steel
Plate and buffering rubber mat plate composition, are from top to bottom sequentially placed heavy duty wheel guide groove, supporting steel plate, yielding rubber backing plate, buffer rubber
Rubber cushion plate and the layer contact of non-fragment orbit cement asphalt mortar filling bed or self-compacting concrete filling.
A kind of ballastless track boards quick change method, the described method comprises the following steps：（1）It is gentle according to actual measurement rail
Fastening-down temperature of rail determines to unclamp the length of fastener and jack-up rail, it would be desirable to change rail jacking 30cm above track plates~
40cm；（2）Multifunctional connecting component is installed in track plates side；（3）Acted on track plates using across top on Multifunctional connecting component
Vertical jack-up 30cm~35cm；（4）Heavy duty wheel is arranged on track plates by Multifunctional connecting component；（5）In heavy duty wheel just
Translation track is laid in lower section, while building track sheet tray in line-to-line；（6）Track plates are fallen, are located in heavy duty wheel flat
Move in track guide groove, track plates are manually released into upper rail of square steel scope, and be located on track sheet tray；（7）Utilize track plates
The track plates of removal are hung on rail flat car by hanging device, and the new-track plate that scene is transported in advance and install heavy duty wheel is hung
To pallet, manually push it into original track Board position and fall within cement asphalt mortar filling bed or self-compacting concrete filling layer
On；（8）To track plates, vertically and horizontally position is adjusted, and rail is fallen；（9）Recover the spacing and track plates of track plates with filling
Fill out layers cementing；（10）Accurate adjustment is carried out to circuit, operation is opened.
A kind of ballastless track boards quick change method, it is described to be determined to unclamp the length of fastener and jack-up rail according to rail temperature
When spending, the maximum stress that can be born according to rail in the case where top lifting height is certain is calculated.
A kind of ballastless track boards quick change method, it is original using track plates during the installation Multifunctional connecting component
Bolt hole.
A kind of ballastless track boards quick change method, the jacking track plate, fixed heavy duty wheel, ceiling mounted tracks plate are equal
It make use of Multifunctional connecting component.
A kind of ballastless track boards quick change method, it is described that track plates are moved into the height that pallet is gone forward using pallet
Adjusting means is by pallet leveling.
Brief description of the drawings
Fig. 1 is the plate-type ballastless track boards quick-replaceable construction flow charts of CRTS I.
Fig. 2 is typical track plates translation schematic diagram.
Fig. 3 is that typical track plates removal rail scope is placed in pallet schematic diagram.
Fig. 4 is the plate-type ballastless track boards quick-replaceable construction flow charts of CRTS II.
Description of reference numerals：
1-left line central lines of track；2-1-left the rail of left line；2-2-right the rail of left line；3-track plates to be replaced；4-1-track plates
Left side Multifunctional connecting component；Multifunctional connecting component on the right side of 4-2-track plates；5-1-steering heavy duty wheel；5-2-orientation heavy duty wheel；
6-translation track；7-cement asphalt mortar filling bed；8-track sheet tray；9-right line central lines of track.
Embodiment
Realization below by way of the specific embodiment introduction present invention and had the advantage that, but of the invention do not limited to
In this, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Embodiment 1
The embodiment of the present invention 1 provides a kind of for the plate-type ballastless track boards quick-replaceable systems of Double-line straight line segment CRTS I
Fig. 1 is shown in system and method, its technological process, and the replacing system and method specifically include herein below：
（1）Adjust and order according to electricity, carry out contact net power failure, electrical verification, hanging ground-wire, and carry out correlative protection measure；Using play the line of ink marker,
Guiding ruler, steel ruler, string of a musical instrument etc. are measured and identified to the plane and elevation location of original track plate, and carry out data record, mainly
The relative position between original track plate and adjacent tracks plate is measured, including between horizontal level, distance between plates, plate between the discrepancy in elevation, boss
Gap has the parameter of positioning track board status；
（2）Dismounting need to change all spare and accessory parts on track plates, and dismounting need to lift the bolt and track gauge block in the range of rail, by boss
Resin is cut；
（3）Survey 20 DEG C of rail temperature, and with actual lock rail temperature 25 DEG C be compared, unclamp replacing track plates 3 before and after 25 meters
Fastener, 30cm will be risen by rail of square steel 2-1,2-2 thereon, as shown in Fig. 2, the cushion block of proper height is placed under rail simultaneously, with
To avoid rail directly to slide completely etc. unexpected to occur.When lifting rail amount and reaching 30cm, in the point close vicinity and by between certain of raising track
Supported firm away from the rail after setting the suitable cushion block of size to lifting；
（4）As shown in Fig. 2 Multifunctional connecting component 4-1,4-2 are installed in the position for changing the former bolt hole in the both sides of track plates 3, per side
2 Multifunctional connecting components are installed, using, by the jack-up 28cm of track plates 3, correspondence Multifunctional connecting component is arranged across top, across topmast across top
Support point is acted on Multifunctional connecting component, and heavy duty wheel 5-1,5-2, heavy duty wheel 5- are installed at track plates bottom by Multifunctional connecting component
1 is deflecting roller, and heavy duty wheel 5-2 is directional wheel, meanwhile, place translation track 6, translation track rubber blanket below heavy duty wheel correspondence
Plate is close to cement asphalt mortar filling bed 7 and placed, and track sheet tray 8 is set up in line-to-line, will by tray supporter adjusting means
Track plates are manually released upper rail of square steel scope along guide groove, are placed on track sheet tray 8, as shown in figure 3, utilizing by the leveling of pallet 8
It is parked in and faces the hanging device of line 9 track plates of replacing are hung in the scene of on rail flat car, transporting in advance and weight is installed
The new-track plate for carrying wheel is put on pallet 8；
（5）The surface of unsticking cement asphalt mortar filling bed 7 is checked, residual scum is polished flat, cleaned out；
（6）It is artificial to move into new-track plate below rail 2-1,2-2；
（7）New-track plate is extensive according to the original track Board position progress of measurement, and track board status is adjusted using fine adjustment pawl
Positioning, and track Board position is checked；
（8）2-1,2-2 rail are dropped back into original position, track Board position will be changed and the front and rear fastener unclamped is tightened, carried out simultaneously
Boss resin infusion；
（9）According to new-track plate and slurry placement layer gap state, it is determined whether enter andante rising pouring glue, if new-track plate bottom with
Former unsticking surface gap is larger, is filled the injection of fast hard material to new-track plate and former unsticking lamellar spacing, slip casting using slip casting machine
Material solidifies rapidly, and realization is fixed to new-track plate；
（10）Track condition is measured comprehensively before and after exchange plate location, and line style is analyzed, and rail is carried out according to analysis result
Finely tune in road, it is ensured that Track regularity meets train and opens condition；
（11）Power supply ground wire is removed, track structure, physical dimension is checked comprehensively, site clearing, instrument is all withdrawn from
Circuit, then opens circuit；
（12）After line clear, using be wirelessly transferred the exchange train operation stability indicator of plate section, track structure part by
Power, the stability indicator of track structure, orbit rigidity index, track structure part and vibration of foundation acceleration are supervised in real time
Control.If there is exception, notify at once and handle.
Embodiment 2
The embodiment of the present invention 2 provides a kind of for the plate-type ballastless track boards quick-replaceable systems of Double-line straight line segment CRTS II
Fig. 4 is shown in system and method, its technological process, and the replacing system and method specifically include herein below：
（1）In the track plates 3 to be changed（Shown in Fig. 2）Plant anchor is carried out on the adjacent orbit plate of both sides, two ends width is cut and connects
Concrete is stitched, and two ends tensioning lock is unlocked；
（2）Adjust and order according to electricity, carry out contact net power failure, electrical verification, hanging ground-wire, and carry out correlative protection measure；Using play the line of ink marker,
Guiding ruler, steel ruler, string of a musical instrument etc. are measured and identified to the plane and elevation location of original track plate, and carry out data record, mainly
The relative position between original track plate and adjacent tracks plate is measured, including the discrepancy in elevation has positioning between horizontal level, distance between plates, plate
The parameter of track board status；
（3）All spare and accessory parts on track plates are changed in dismounting, and dismounting need to lift the bolt and track gauge block in the range of rail；
（4）Survey 18 DEG C of rail temperature, and with actual lock rail temperature 28 DEG C be compared, unclamp before and after replacing track plates 30 meters
Fastener, will rise 30cm by rail of square steel 2-1,2-2 thereon, as shown in Fig. 2, the cushion block of proper height is placed under rail, with complete simultaneously
It is complete that to avoid rail from directly sliding etc. unexpected occurs.When lift rail amount reaches 30cm, in track lifting point close vicinity and at a certain distance
Rail after the suitable cushion block of size is set to lifting is supported firm；
（5）As shown in Fig. 2 installing Multifunctional connecting component 4-1,4-2 by the fastening bolt hole of track plates 3, work(more than 2 is installed per side
Energy connector, using, by the jack-up 25cm of track plates 3, across top correspondence Multifunctional connecting component arrangement, across topmast support point is acted on across top
On Multifunctional connecting component, heavy duty wheel 5-1,5-2 are installed at track plates bottom by Multifunctional connecting component, heavy duty wheel 5-1 is deflecting roller,
Heavy duty wheel 5-2 is directional wheel, meanwhile, translation track 6 is placed below heavy duty wheel correspondence, translation track rubber mat plate is close to cement
Asphalt mortar, bituminous mortar filling bed 7 is placed, and track sheet tray 8 is set up in line-to-line, by tray supporter adjusting means by the leveling of pallet 8,
It is artificial that track plates are released into upper rail of square steel scope along guide groove, it is placed on track sheet tray 8, as shown in figure 3, facing line using being parked in
9 hanging device hangs the track plates of replacing on rail flat car, and scene will be transported in advance and the new rail of heavy duty wheel is installed
Guidance tape is put on pallet 8；
（6）The surface of unsticking cement asphalt mortar filling bed 7 is checked, residual scum is polished flat, cleaned out；
（7）It is artificial to move into new-track plate below rail 2-1,2-2；
（8）New-track plate is extensive according to the original track Board position progress of measurement, and track board status is adjusted using fine adjustment pawl
Positioning, and track Board position is checked；
（9）2-1,2-2 rail are dropped back into original position, track Board position will be changed and the front and rear fastener unclamped is tightened, carried out simultaneously
Two ends width seams is poured；
（10）According to the gap state of new-track plate and slurry placement layer, it is determined whether enter andante rising pouring glue, if new-track plate bottom
It is larger with former unsticking surface gap, using slip casting machine by fast hard material injection filling to new-track plate and former unsticking lamellar spacing, note
Pulp material solidifies rapidly, and realization is fixed to new-track plate；
（11）Track condition is measured comprehensively before and after exchange plate location, and line style is analyzed, and rail is carried out according to analysis result
Finely tune in road, it is ensured that Track regularity meets train and opens condition；
（12）Power supply ground wire is removed, track structure, physical dimension is checked comprehensively, site clearing, instrument is all withdrawn from
Circuit, then opens circuit；
（13）After line clear, using be wirelessly transferred the exchange train operation stability indicator of plate section, track structure part by
Power, the stability indicator of track structure, orbit rigidity index, track structure part and vibration of foundation acceleration are supervised in real time
Control.If there is exception, notify at once and handle.
Claims (8)
1. a kind of quick-replaceable system and method for ballastless track boards, the replacing system includes rail jacking apparatus, rail
Guidance tape jacking apparatus, track plates translating device, track sheet tray, track plate transporting transfer device, track plates hanging device；It is described to change
Method is rail jack-up certain altitude on the track plates that will be changed, and, by track plates jacking, track plates are recycled using across top
Track plates removal rail scope is placed on pallet by translating device, is removed using hanging device by be changed track plates, and
New-track plate is placed on pallet, new-track plate moves into original track Board position is in place, finally recover the spacing of track plates and
Track plates and filling layers cementing.
2. according to a kind of track plates fast replacement system described in claim 1, it is characterised in that：The track plates jacking apparatus
It is made up of Multifunctional connecting component and machinery across top, Multifunctional connecting component is solid using original track plate side bolt holes or fastening bolt hole
It is scheduled on track plates, machinery is arranged symmetrically across withstanding on track plates both sides, each arrangement 2 per side.
3. according to a kind of track plates fast replacement system described in claim 1, it is characterised in that：The track plates translating device
By Multifunctional connecting component, heavy duty wheel and translation track groups into heavy duty wheel is fixed on track plates by Multifunctional connecting component, preceding
Enter the heavy duty wheel of direction front end two and be set to deflecting roller, the heavy duty wheel of rear end two is set to directional wheel, and translation track correspondence heavy duty wheel is horizontal
To arrangement.
4. according to a kind of track plates fast replacement system described in claim 1, it is characterised in that：The track sheet tray is by four
Individual support composition, each support is equipped with arrangement for adjusting height, and pallet dimension meets the requirement of non-fragment orbit line-to-line boundary.
5. according to a kind of track plates fast replacement system described in claim 2 and claim 3, it is characterised in that：It is described many
Function connects part is installed using original track plate side bolt holes or fastening bolt hole, and it is track plates jacking, heavy duty wheel is solid
The lifting of fixed and track plates is utilized simultaneously.
6. according to a kind of track plates fast replacement system described in claim 3, it is characterised in that：The track plates translation track
By heavy duty wheel guide groove, supporting steel plate and buffering rubber mat plate constitute, be from top to bottom sequentially placed heavy duty wheel guide groove, supporting steel plate,
Yielding rubber backing plate, yielding rubber backing plate and non-fragment orbit cement asphalt mortar filling bed or self-compacting concrete filling layer connect
Touch.
7. a kind of track plates quick change method according to claim 1, it is characterised in that comprise the following steps：（1）Root
Factually survey the gentle fastening-down temperature of rail of rail to determine to unclamp the length of fastener and jack-up rail, it would be desirable to change the rail top above track plates
Rise 30cm~40cm；（2）Multifunctional connecting component is installed in track plates side；（3）Acted on using across top on Multifunctional connecting component
By the vertical jack-up 30cm~35cm of track plates；（4）Heavy duty wheel is arranged on track plates by Multifunctional connecting component；（5）In weight
Translation track is laid in the underface for carrying wheel, while building track sheet tray in line-to-line；（6）Track plates are fallen, make heavily loaded wheel
It is located in translation track guide groove, track plates is manually released into upper rail of square steel scope, and be located on track sheet tray；（7）Profit
The track plates of removal are hung on rail flat car with track plates hanging device, scene will be transported in advance and installs the new of heavy duty wheel
Track plates are hung on pallet, are manually pushed it into original track Board position and are fallen within cement asphalt mortar filling bed or self-compaction coagulation
On native filling bed；（8）To track plates, vertically and horizontally position is adjusted, and rail is fallen；（9）Recover the spacing and rail of track plates
Guidance tape and filling layers cementing；（10）Accurate adjustment is carried out to circuit, operation is opened.
8. a kind of track plates quick change method according to claim 7, it is characterised in that：In step（1）It is middle according to rail
During the length of temperature determination release fastener and jack-up rail, the maximum that can be born according to rail in the case where top lifting height is certain
Stress is calculated；Step（2）The original bolt hole of track plates is utilized during middle installation Multifunctional connecting component；In step（3）, step
（4）, step（7）Middle jacking track plate, fixed heavy duty wheel, ceiling mounted tracks plate make use of Multifunctional connecting component；Step（6）It is middle to incite somebody to action
Track plates move to arrangement for adjusting height that pallet goes forward using pallet by pallet leveling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344425.8A CN106948228B (en) | 2017-05-16 | 2017-05-16 | Quick replacement method for track plate of plate-type ballastless track |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710344425.8A CN106948228B (en) | 2017-05-16 | 2017-05-16 | Quick replacement method for track plate of plate-type ballastless track |
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| CN106948228A true CN106948228A (en) | 2017-07-14 |
| CN106948228B CN106948228B (en) | 2021-03-19 |
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| CN201710344425.8A Active CN106948228B (en) | 2017-05-16 | 2017-05-16 | Quick replacement method for track plate of plate-type ballastless track |
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| CN108385456A (en) * | 2018-03-07 | 2018-08-10 | 中国铁道科学研究院铁道建筑研究所 | A kind of board-like ballastless track bed board integral replacing method of cast-in-place railway roadbed |
| CN110396879A (en) * | 2019-08-13 | 2019-11-01 | 长沙瀚鹏电子技术有限公司 | A kind of insulated buffer plate is more changed trains |
| CN110541329A (en) * | 2019-08-13 | 2019-12-06 | 中铁六局集团有限公司 | construction method of ballastless track of heavy haul railway tunnel group |
| CN110541329B (en) * | 2019-08-13 | 2022-02-18 | 中铁六局集团有限公司 | Construction method of ballastless track of heavy haul railway tunnel group |
| CN111877061A (en) * | 2020-07-14 | 2020-11-03 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for replacing ballastless track bed hidden structure |
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