CN108374297B - Business Line tunnel, bridge section concrete sleeper swap method - Google Patents
Business Line tunnel, bridge section concrete sleeper swap method Download PDFInfo
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- CN108374297B CN108374297B CN201810120021.5A CN201810120021A CN108374297B CN 108374297 B CN108374297 B CN 108374297B CN 201810120021 A CN201810120021 A CN 201810120021A CN 108374297 B CN108374297 B CN 108374297B
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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
- E01B29/06—Transporting, laying, removing or renewing sleepers
- E01B29/09—Transporting, laying, removing or renewing sleepers under, or from under, installed rails
- E01B29/10—Transporting, laying, removing or renewing sleepers under, or from under, installed rails for inserting or removing sleepers
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Abstract
The invention discloses a kind of Business Line tunnels, bridge section concrete sleeper swap method, are related to railway in operation tunnel, bridge location replacement concrete sleeper field technical field.The Business Line tunnel, bridge section concrete sleeper swap method, including unloading pillow, preparation of construction, having bad luck sleeper, push crib railway ballast aside, unload fastener, the old pillow of extraction, leveling railway roadbed, penetrate new pillow, fastener for installing, backfill railway ballast, raise track, make whole thin, installation anti-creep equipment and tie rod firm by ramming, recycling old material, check and accept and open, check trimming.This programme passes through the tunnel that replace sleeper using train, it will newly rest the head on and be transported by the train, and new sleeper is discharged at tunnel both ends respectively, track two sides are forward placed in by hand haulage and by the sleeper unloaded, the quantity ratio 3:2 of two sides sleeper, facilitate worker from two sides while going into operation, intersect replacement, pillow efficiency is changed in raising.
Description
Technical field
The present invention relates to railway in operation tunnel, bridge locations to replace concrete sleeper field, more particularly to a kind of business
Threaded list road, bridge section concrete sleeper swap method.
Background technique
With the rapid development of our country's economy, transportation demand amount is significantly increasing, especially to railway transportation demand
Increase severely, the demand for causing railway transport capacity and shipping mass to be far from satisfying socio-economic development to railway transportation.Its
In, a collection of single-track railway built the seventies and eighties in last century is no longer satisfied Operational requirements.Therefore it needs through transformation both
The modes such as wired, increase two wires improve capacity.
The existing line for needing to be transformed is as shown in Figure 1, include roadbed 1, track 3 and supporting track on roadbed 1
3 and along 3 length direction of track setting sleeper 4.It is connected between track 3 and sleeper 4 by connection component 5, connection component 5 plays
Positioning, the effect of buffering, generally include spring washer, bolt, iron seat, rubber mat, headblock piece etc..Between adjacent sleeper 4 with two sides
The rectangular space that track 3 is constituted is crib 6.Railway ballast 2 is uniformly equipped on roadbed 1 and crib 6.Usually at 1 liang of roadbed
3 length direction equipment of lateral edge track has gutter, and gutter top opening is covered by ditch cover board.Wherein, roadbed 1, railway ballast 2
Railway roadbed is constituted with sleeper 4.
When being substituted to Business Line concrete crosstie, when route of doing business is located in tunnel or when the narrow locations such as bridge, one
A little large scale equipments can not be applied, it is therefore desirable to could complete the task of replacement sleeper by manually cooperating with equipment.Therefore
In order to guarantee construction safety, a kind of side of narrow location replacement sleeper of railway tunnel and bridge etc. under the conditions of operating line is needed
Method.
Summary of the invention
The technical problem to be solved by the present invention is to, the shortcomings that overcoming the prior art, a kind of Business Line tunnel, bridge are provided
Section concrete sleeper replacement method, in a limited space in by manually with equipment work in coordination complete sleeper substitute work
Make.
In order to solve the above technical problems, the present invention provides a kind of Business Line tunnel, the bridge section concrete sleeper side of substituting
Method, including,
Pillow is unloaded, in advance unloads sleeper to the two sides ditch side of tunnel both ends roadbed section, put neat and is anchored；
Preparation of construction first determines the position of " enabling ", and the anti-creep equipment and tie rod that will affect operation are removed or removed, root
It is marked on rail web according to design sleeper position paint, the railway roadbed that replace section to track before " skylight point " is sprinkled water, together
When install temporary lighting equipment, according to replacement section railway roadbed hardened or degree of fouling, with mend tiny fragments of stone, coal, etc. vehicle supplement railway ballast；
Sleeper is had bad luck, new pillow is had bad luck to tunnel with flat car or monorail trolley, sleeper is piled up route side three and pressed
Triangle disposition is piled up, and the other side two piles up side by side, and sleeper is tilted to tunnel side wall side, and must not fouling of clearance gauge, sleeper leans on
The side of nearly ditch cover board, which is gently lifted, puts down gently；
It pushs crib railway ballast aside, pushs the stone tiny fragments of stone, coal, etc. of sleeper one end aside, then push aside again in the crib of side and under sleeper
Railway ballast, pushing depth aside and being subject to can extract out, penetrate sleeper, and suitably claw the railway ballast in the crib of the other side close to sleeper；
Fastener is unloaded, nut is unclamped with spanner, unloads spring washer buckle, iron seat, small rubber mat, rail is tilted with crowbar, removes
Except big rubber mat and headblock piece；
It extracts old pillow out, old pillow is laterally dialled in the crib for removing railway ballast with crowbar, pulls out old pillow and by the old of extraction
Pillow transports outside tunnel, and in route two sides designated place, pile is neat, stablizes, must not fouling of clearance gauge；
Railway roadbed is flattened, position bottom railway roadbed railway ballast will be newly rested the head on and arrange smoothly；
New pillow is penetrated, new sleeper is penetrated from the opening that crib is located at below track, it is mobile using rope and crowbar
In place；
Fastener for installing first puts big rubber mat well, new pillow is lifted, screw rod oiling, then load by spare and accessory parts erection sequence, is put just
Position checks gauge, finally upper clasp；
It backfills railway ballast, raise track, manually clean railway ballast is backfilling into crib, hydraulic track jack, which raises track to design, to be marked
Height, and sleeper bottom railway ballast string is real；
It makes firm by ramming whole thin, is manually made firm by ramming with a small group of planes, made firm by ramming with to reach big machine and carry out big machine after condition and make firm by ramming, it is artificial extensive
Multiple railway ballast standard section, cleans the broken tiny fragments of stone, coal, etc. between fastener, by the dirt soil after cleaning, manually has bad luck entrucking and is transported to abandoning Zha Chang centralized processing；
Anti-creep equipment and tie rod are installed；
Old material is recycled, waste and scrap is collected, to be put into temporary storing place pile neat the old sleeper to get off is substituted, it is ensured that
Not fouling of clearance gauge；
Open-minded, road under personnel is checked and accepted, equipment recycles not fouling of clearance gauge, according to technical staff to route gauge, direction, level
It measures, design and code requirement should be met, after self-test is qualified, report management, construction supervision department carry out core to above-mentioned parameter
It looks into, after meeting the requirements, opens route, finally gone slowly according to code requirement setting, ladder speed-raising；
Check trimming, after train passes through, establishment officer carries out check trimming to route, and confirmation route reaches prescribed requirement simultaneously
It makes a record.
The present invention is further arranged to: before bridge section changes pillow, using pillow skylight point is changed, manually being removed guard rail on bridge, point
It is interior to be pushed into route two sides roadbed outside end of the bridge with flat car, outside safety clearance.
The present invention is further arranged to: beam reinforcement, is anchored before exchanging bridge sleeper (4) to steel bracket U-bolt strong
Degree, corrosion degree, damaged degree carry out site inspection, are marked in corresponding position, and carry out support reinforcement in mark.
The present invention is further arranged to: bridge tie is placed against gear Zha Qiang along bridge length direction.
The beneficial effects of the present invention are:
(1) in the present invention before skylight point, pass through the tunnel that replace sleeper using train, will newly rest the head on and be transported by the train
It is defeated, and new sleeper is discharged at tunnel both ends respectively, track two sides are forward placed in by hand haulage and by the sleeper unloaded, two
The quantity ratio 3:2 of siding track pillow, facilitates worker from two sides while going into operation, and intersects replacement, and pillow efficiency is changed in raising；
(2) pillow is changed for bridge section in the present invention, needs first to carry out support reinforcement to bridge, then uses interval replacement,
Bridge is divided into several sections, the sleeper of bridge is replaced in batches, improves the replacement efficiency of sleeper.
Detailed description of the invention
Fig. 1 is background technique schematic diagram；
Fig. 2 is the schematic diagram for indicating train fortune pillow；
Fig. 3 is the schematic diagram for indicating Manual rail unloading pillow；
Fig. 4 is that embodiment 1 indicates that sleeper unloads the schematic diagram being placed at tunnel face；
Fig. 5 is that embodiment 1 indicates that sleeper unloads the schematic diagram of close-packed array, angled manner；
Fig. 6 is that embodiment 1 indicates that tunnel construction sections take out old pillow schematic diagram；
Fig. 7 is that embodiment 1 indicates that tunnel construction sections flatten railway roadbed schematic diagram；
Fig. 8 indicates that tunnel construction sections are newly rested the head on for embodiment 1 and penetrates schematic diagram；
Fig. 9 is that embodiment 1 indicates that old pillow extracts disposing way schematic diagram out.
Wherein: 1, roadbed；2, railway ballast；3, track；4, sleeper；5, connection component；6, crib.
Specific embodiment
Wherein identical components are presented with like reference characters.It should be noted that word used in the following description
Language "front", "rear", "left", "right", "up" and "down" refer to the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and
"outside" refers respectively to the direction towards or away from geometric center of specific component.
Embodiment 1:
A kind of Business Line tunnel construction sections concrete sleeper swap method provided in this embodiment, including,
Pillow is unloaded, in advance unloads sleeper 4 to 1 section of tunnel both ends roadbed of two sides ditch side, put neat and is anchored；
Preparation of construction first determines the position of " enabling ", and the anti-creep equipment and tie rod that will affect operation are removed or removed, root
It is marked on 3 web of the rail of track according to design sleeper position paint, the railway roadbed that replace section to track 3 before " skylight point " is sprinkled water,
Temporary lighting equipment is installed simultaneously, according to the hardened or degree of fouling of replacement section railway roadbed, supplements railway ballast 2 with tiny fragments of stone, coal, etc. vehicle is mended；
Sleeper is had bad luck, new pillow is had bad luck to tunnel with flat car or monorail trolley, sleeper 4 is piled up route side three and pressed
Triangle disposition is piled up, and the other side two piles up side by side, and sleeper 4 is tilted to tunnel side wall side, and must not fouling of clearance gauge, sleeper 4
It gently lifts and puts down gently close to the side of ditch cover board；
It pushs 6 railway ballast 2 of crib aside, pushs the stone tiny fragments of stone, coal, etc. of 4 one end of sleeper aside, then push aside again in side crib 6 and 4 bottom of sleeper
Under railway ballast 2, pushing depth aside and being subject to can extract out, penetrate sleeper 4, and suitably claw in other side crib 6 close to sleeper 4
Railway ballast 2；
Fastener is unloaded, nut is unclamped with spanner, unloads spring washer buckle, iron seat, small rubber mat, rail is tilted with crowbar, removes
Except big rubber mat and headblock piece；
It extracts old pillow out, old pillow is laterally dialled in the crib 6 for removing railway ballast 2 with crowbar, pulls out old pillow and by extraction
Old pillow transports outside tunnel, and in route two sides designated place, pile is neat, stablizes, must not fouling of clearance gauge；
Railway roadbed is flattened, position bottom railway roadbed railway ballast 2 will be newly rested the head on and arrange smoothly；
New pillow is penetrated, new sleeper 4 is penetrated from the opening that crib 6 is located at 3 lower section of track, is moved using rope and crowbar
It moves in place；
Fastener for installing first puts big rubber mat well, new pillow is lifted, screw rod oiling, then load by spare and accessory parts erection sequence, is put just
Position checks gauge, finally upper clasp；
It backfills railway ballast 2, raise track, manually clean railway ballast 2 is backfilling into crib 6, hydraulic track jack raises track to design
Absolute altitude, and sleeper bottom railway ballast 2 is gone here and there into reality；
It makes firm by ramming whole thin, is manually made firm by ramming with a small group of planes, made firm by ramming with to reach big machine and carry out big machine after condition and make firm by ramming, it is artificial extensive
Multiple 2 standard section of railway ballast, cleans the broken tiny fragments of stone, coal, etc. between fastener, by the dirt soil after cleaning, manually has bad luck entrucking and is transported to abandoning Zha Chang centralized processing；
Anti-creep equipment and tie rod are installed；
Old material is recycled, waste and scrap is collected, to be put into temporary storing place pile neat the old sleeper to get off is substituted, it is ensured that
Not fouling of clearance gauge；
Open-minded, road under personnel is checked and accepted, equipment recycles not fouling of clearance gauge, according to technical staff to route gauge, direction, level
It measures, design and code requirement should be met, after self-test is qualified, report management, construction supervision department carry out core to above-mentioned parameter
It looks into, after meeting the requirements, opens route, finally gone slowly according to code requirement setting, ladder speed-raising；
Check trimming, after train passes through, establishment officer carries out check trimming to route, and confirmation route reaches prescribed requirement simultaneously
It makes a record.
Wherein,
It opens the door, refers to the railway ballast 2 for pushing 4 one end of sleeper aside；
The tiny fragments of stone, coal, etc. is taken off, refers to and pushes railway ballast 2 aside；
Skylight point, refers to certain time, and train pause passes through in the time, for examining to equipment such as route, contact nets
It repairs；
Crib 6 refers to the rectangular space that two sleepers and rail are constituted on track；
Railway ballast 2 refers to coarse gravel or rubble for base 1 of paving the way, Shi Zhiwei granite；
Anti-creep equipment refers to anticreeper or anti-creeping strut；
Limit prevents locomotive Vehicular impact neighbouring in order to ensure the safety that rolling stock is run on railway line route
The building and equipment of route, and to rolling stock and close to the building of route, the wheel for not allowing to surmount of equipment defined
Wide dimension line；
Big rubber mat is larger or smaller compared with small rubber mat refers to the two.
Embodiment 2:
A kind of Business Line bridge section concrete sleeper swap method provided in this embodiment, including,
Before changing pillow, using pillow skylight point is changed, manually guard rail on bridge is removed, is pushed into route two outside end of the bridge with flat car in point
Dypass base, outside safety clearance.
Beam reinforcement carries out site inspection to steel bracket U-bolt anchoring strength, corrosion degree, damaged degree, carries out phase
It should mark.The lateral connection of beams of concrete is checked, considers that beam body increases whether eccentric load influences its stability, need to have
Experimental result is reconnoitred by relevant unit, and takes corresponding reinforcement measure.
Wherein, forbid preloading sleeper and bridge tie on side walk slab, bridge tie must against gear Zha Qiang along bridge to placement, tieed up on bridge
When repairing operation or overhaul construction, it is necessary to there is special messenger to be responsible for inspection.
Regulation and reinforcing, to the steel bracket pavement of Lack of support, on the pavement center foot plank in dangerous place,
The red thick stick alert flag that width 50mm must be sprayed, in accommodation rail at the red printed words one of 50m spraying " forbidding preloading ", no
At sufficient 50m spraying one.
Steel bracket pavement should be reinforced by " both wired beams of concrete steel bracket pavement had reinforced figure ", and replace carrying
Hypodynamic foot plank.
To the juxtaposition beams of concrete of no lateral connection, firm support top must be taken on the outside of beam body before the preloading of pavement
Measure, and Stability Checking is carried out according to preloading situation.The juxtaposition beams of concrete of practical bolt anchor plate lateral connection considers
The increase of preloading bearing capacity and the deficiency of beam body lateral connection, need the method for taking this beam body two sides support top sleeper to be faced
When reinforcement measure, beam body supported four end of beam body using four lumps of wood (20 × 20cm) respectively, worn between two panels beam using fish platee
It inserts bolt and carries out lateral connection.
Using method construction is substituted, 500 or less have the bridge of transversely strengthening, change 6 every 6；Due to being limited by fortune pillow, 500
The bridge for not carrying out transversely strengthening above and is to change 6 every 12；The old pillow same day transports outside bridge, unloads pillow, anchors, changes three construction alternatings of pillow
It carries out.It adopts this method, first is that the ballast by the same day 6 sleepers to be changed is facilitated to be stacked at adjacent 6 (12) sleepers not changed
In box, is reduced to the greatest extent according to bracket bearing capacity appraisal or forbid storing ballast and old pillow toward on foot plank；Second is that due to steel
The distance of rail outside to guardrail is 1.6m to 2m, the long 2.6m of sleeper, and sleepers can only be passed in and out among two strands of rail.
Sleeper is had bad luck on bridge, applies for skylight point after the completion of beam reinforcement, is had bad luck in skylight point with flat car or monorail trolley
To bridge, it is placed on the ballast of route two sides.Forbid for sleeper being placed on side walk slab, to avoid danger.
It pushs 6 railway ballast of crib aside, pushs the stone tiny fragments of stone, coal, etc. of sleeper one end aside, then push aside again in the crib of side and under sleeper
Railway ballast, pushing depth aside and being subject to can extract out, penetrate sleeper, and suitably claw the railway ballast in the crib of the other side close to sleeper, with
Railway ballast flows when preventing substituting sleeper.
Fastener is unloaded, nut is unclamped with spanner, unloads spring washer buckle, iron seat, small rubber mat, rail is tilted with crowbar, removes
Except big rubber mat and headblock piece.
It extracts old pillow out, old pillow is laterally dialled in the stone tiny fragments of stone, coal, etc. slot pulled out with crowbar, transfers to (or being pulled out with rope) old pillow, and
Special messenger is sent to transport the old pillow of extraction to outside end of the bridge, pile is neat in route two sides designated place, stablizes, and must not invade limit.
Railway roadbed is flattened, the new railway roadbed for resting the head on position is slightly deep, is slightly wider than old pillow, and railway roadbed bottom should be smooth, prevents the new pillow penetrated
It is just uneven.
New pillow is penetrated, concrete crosstie is lifted on " doorway " with concrete crosstie lift pincers, then penetrate new pillow with rope and crowbar, is used
Crowbar is horizontal to push position.
Fastener for installing first puts big rubber mat well, new pillow is lifted, screw rod oiling, then load by spare and accessory parts erection sequence, is put just
Position checks gauge, upper clasp.
It backfills railway ballast, raise track, manually clean railway ballast is backfilling into crib 6, hydraulic track jack, which raises track to design, to be marked
Height, and sleeper bottom railway ballast string is real.
It makes firm by ramming whole thin, is manually made firm by ramming with a small group of planes, made firm by ramming with to reach big machine and carry out big machine after condition and make firm by ramming, it is artificial extensive
Multiple railway ballast standard section, cleans the broken tiny fragments of stone, coal, etc. between fastener, by the dirt soil after cleaning, manually has bad luck entrucking and is transported to abandoning Zha Chang centralized processing.
Open-minded, road under personnel is checked and accepted, limit is not invaded in equipment recycling.According to technical staff to route gauge, direction, horizontal progress
Measurement, should meet design and code requirement.After self-test is qualified, report management, construction supervision department verify above-mentioned parameter, accord with
It closes after requiring, opens route.It is gone slowly according to code requirement setting, ladder speed-raising.
Second or the remaining concrete bridge tie that do not replace of third block point replacement, repeat above step, until having replaced
At.
In addition to the implementation, the present invention can also have other embodiments；It is all to use equivalent substitution or equivalent transformation shape
At technical solution, fall within the scope of protection required by the present invention.
Claims (4)
1. a kind of Business Line tunnel, bridge section concrete sleeper swap method, it is characterised in that: including,
Pillow is unloaded, in advance unloads sleeper (4) to the two sides ditch side of tunnel both ends roadbed (1) section, put neat and is anchored；
Preparation of construction first determines the position of " enabling ", and the anti-creep equipment and tie rod that will affect operation removes or remove, according to setting
Meter sleeper position paint is marked on track (3) web of the rail, sprinkles water before " skylight point " to the railway roadbed in track (3) section Yao Genghuan,
Temporary lighting equipment is installed simultaneously, according to the hardened or degree of fouling of replacement section railway roadbed, supplements railway ballast (2) with tiny fragments of stone, coal, etc. vehicle is mended；
Sleeper is had bad luck, new pillow is had bad luck to tunnel with flat car or monorail trolley, sleeper (4) is piled up route side three and pressed
Triangle disposition is piled up, and the other side two piles up side by side, and sleeper (4) is tilted to tunnel side wall side, and must not fouling of clearance gauge, sleeper
(4) it gently lifts and puts down gently close to the side of ditch cover board；
It pushs crib (6) railway ballast (2) aside, pushs the stone tiny fragments of stone, coal, etc. of sleeper (4) one end aside, then push aside again in side crib (6) and rail
The railway ballast (2) under (4) is rested the head on, pushing depth aside and being subject to can extract out, penetrate sleeper (4), and suitably claw other side crib (6)
The railway ballast (2) of interior close sleeper (4)；
Fastener is unloaded, nut is unclamped with spanner, unloads spring washer buckle, iron seat, small rubber mat, tilts rail with crowbar, is removed big
Rubber mat and headblock piece；
It extracts old pillow out, old pillow is laterally dialled in the crib (6) for removing railway ballast (2) with crowbar, pulls out old pillow and by extraction
Old pillow transports outside tunnel, and in route two sides designated place, pile is neat, stablizes, must not fouling of clearance gauge；
Railway roadbed is flattened, position bottom railway roadbed railway ballast (2) will be newly rested the head on and arrange smoothly；
New pillow is penetrated, new sleeper (4) is penetrated from the opening that crib (6) is located at below track (3), utilizes rope and crowbar
Movement is in place；
Fastener for installing first puts big rubber mat well, new pillow is lifted, screw rod oiling, then load by spare and accessory parts erection sequence, puts normotopia
It sets, checks gauge, finally upper clasp；
It backfills railway ballast (2), raise track, manually clean railway ballast (2) is backfilling into crib (6), hydraulic track jack raises track to setting
Absolute altitude is counted, and sleeper bottom railway ballast (2) is gone here and there in fact；
It makes firm by ramming whole thin, is manually made firm by ramming with a small group of planes, made firm by ramming with to reach big machine and carry out big machine after condition and make firm by ramming, manual reversion road
The tiny fragments of stone, coal, etc. (2) standard section cleans the broken tiny fragments of stone, coal, etc. between fastener, by the dirt soil after cleaning, manually has bad luck entrucking and is transported to abandoning Zha Chang centralized processing；
Anti-creep equipment and tie rod are installed；
Old material is recycled, waste and scrap is collected, to be put into temporary storing place pile neat the old sleeper to get off is substituted, it is ensured that does not invade
Enter limit；
Open-minded, road under personnel is checked and accepted, equipment recycles not fouling of clearance gauge, according to technical staff to route gauge, direction, horizontal progress
Measurement should meet design and code requirement, and after self-test is qualified, report management, construction supervision department verify above-mentioned parameter, accord with
It closes after requiring, opens route, finally gone slowly according to code requirement setting, ladder speed-raising；
Check trimming, after train passes through, establishment officer carries out check trimming to route, and confirmation route reaches prescribed requirement and carries out
Record.
2. Business Line tunnel according to claim 1, bridge section concrete sleeper swap method, it is characterised in that: bridge
Before section changes pillow, using pillow skylight point is changed, manually guard rail on bridge is removed, is pushed into route two sides road outside end of the bridge with flat car in point
Base, outside safety clearance.
3. Business Line tunnel according to claim 2, bridge section concrete sleeper swap method, it is characterised in that: beam body
It reinforces, scene is carried out to steel bracket U-bolt anchoring strength, corrosion degree, damaged degree before exchanging bridge sleeper (4) and is surveyed
It looks into, is marked in corresponding position, and carry out support reinforcement in mark.
4. Business Line tunnel according to claim 3, bridge section concrete sleeper swap method, it is characterised in that: bridge tie
It is placed against gear Zha Qiang along bridge length direction.
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| CN201810120021.5A CN108374297B (en) | 2018-02-07 | 2018-02-07 | Business Line tunnel, bridge section concrete sleeper swap method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111733638A (en) * | 2020-07-06 | 2020-10-02 | 中铁一局集团有限公司 | Railway mechanical sleeper replacement construction method based on sleeper replacement machine |
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|---|---|---|---|---|
| CN113152315A (en) * | 2021-03-02 | 2021-07-23 | 中铁第四勘察设计院集团有限公司 | Transverse drainage structure of general speed railway |
| CN113005829A (en) * | 2021-04-06 | 2021-06-22 | 福建汇盛铁路重工有限公司 | Operation method for improving pillow replacement efficiency and reducing personal safety hidden danger |
| CN115012262A (en) * | 2022-07-11 | 2022-09-06 | 株洲时代电子技术有限公司 | Control system of comprehensive operation vehicle |
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