CN107178010A - A kind of city track traffic engineering assembled track laying device and method - Google Patents
A kind of city track traffic engineering assembled track laying device and method Download PDFInfo
- Publication number
- CN107178010A CN107178010A CN201710546154.4A CN201710546154A CN107178010A CN 107178010 A CN107178010 A CN 107178010A CN 201710546154 A CN201710546154 A CN 201710546154A CN 107178010 A CN107178010 A CN 107178010A
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- China
- Prior art keywords
- prefabricated board
- track
- prefabricated
- adjustment
- board
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
- E01B1/008—Drainage of track
-
- 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
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/005—Making of concrete parts of the track in situ
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2203/00—Devices for working the railway-superstructure
- E01B2203/14—Way of locomotion or support
- E01B2203/143—Way of locomotion or support on a side-track
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The present invention relates to a kind of city track traffic engineering assembled track laying device and method, including track foundation construction, including basis, flexible material, self-compacting concrete, assembled track plates, fastener, rail, it is characterized in that, the prefabricated board of prefabricated certain length, the prefabricated board is provided with fastener and reinforcing bar, anti- fan's stream terminal ballast bed structure material, the prefabricated board lays location by the underground cable ballast bed of track of transporting apparatus transports to track laying base, track-laying machine is by prefabricated board hoisting transportation to design attitude, using fixing device by prefabricated board fixation, self-compacting concrete perfusion and ditch construction are carried out above prefabricated board.The present invention is clean and tidy, attractive in appearance compared to simple, outward appearance compared with method, the simple, efficiency high of construction, the outstanding advantages such as reliable in quality.
Description
[technical field]
The present invention relates to city track traffic engineering technical field, specifically a kind of city track traffic engineering assembled rail
Road laying apparatus and method.
[background technology]
It is well known that city track traffic engineering is the backbone of urban public transport.It has energy-conservation, saves ground, freight volume
Greatly, round-the-clock, pollution-free (or of low pollution) but it is safe the features such as, belong to environmental protection railway and highway system, meet the original of sustainable development
Then, it is particularly adapted to big and medium-sized cities construction.Current city track traffic engineering underground cable ballast bed of track construction is substantial amounts of to be operated in
Complete, completed except the section of track is assembled in tracklaying base, section of track installation, the colligation of railway roadbed reinforcing bar, model sheetinstallat, railway roadbed in underground cable tunnel
The construction such as concreting is completed in tunnel, and the limited construction workload of its construction space is big, and can not carry out many scope of operations
Construction.Because city track traffic engineering underground cable is more, underground space of lines finite-orbit operation side be obstructed and construct into
Degree is slow, in order to improve underground cable railway roadbed construction speed and car operation comfort level, will carry out precast track plate on ground, with special
Operation side is transported to means of transport to be installed.
To solve these problems, assembled track laying method will be assembled using the means of transport and lifting device of specialty
Formula prefabricated board is transported to operation side with railcar, is lifted and is installed using track-laying machine, is measured during installation using CP III
The fixed self-compacting concrete that carries out after prefabricated board accurate adjustment is poured.
[content of the invention]
The purpose of the present invention is exactly big in order to solve the limited construction workload of construction space in existing method, and can not be carried out
Many operation surface constructions.Prefabricated board is transported to operation side using professional equipment and carries out Fast Installation and laying, its laying side
The city track traffic engineering assembled track laying method that method is simple, speed of application is fast.
In order to achieve the above object, first carry out laying flexible material after the completion of foundation construction, construction in tunnel, while
The prefabricated plate of producer's progress is prefabricated, and prefabricated board intensity, which reaches, transports after design strength to tracklaying base, using base of laying a railway track
Ground straddle truck, which lifts prefabricated board to railcar flat car, fixes transport to operation side, then will be prefabricated using track-laying machine
Plate, which is lifted to design attitude, install and accurate installation, and the prefabricated board installation accuracy progress model sheetinstallat self-compaction that meets the requirements is mixed
Solidifying soil is poured.Assembled track laying method construction speed is fast, and substantial amounts of be operated in outside tunnel completes, its construction quality and progress
Requirement can be reached.
A kind of city track traffic engineering assembled track laying device, including basis, flexible material, self-compaction coagulation
Soil, assembled track plates, fastener, rail, it is characterised in that the prefabricated board of prefabricated certain length, prefabricated board size are length
5330mm, width 2400mm, thickness 260mm, the prefabricated board flow terminal ballast bed structure material provided with fastener and reinforcing bar, anti-fan,
The prefabricated board lays location by the underground cable ballast bed of track of transporting apparatus transports to track laying base, and track-laying machine will be prefabricated
Plate hoisting transportation, using fixing device by prefabricated board fixation, carries out self-compaction coagulation to design attitude above prefabricated board
Soil perfusion and ditch construction.
The outside of circuit is provided with circuit disjunction mark, at wire center 1.5m, circuit Control benchmark：By straight line 120m, curve
50m is set, link encryption disjunction mark：Set by straight line 6.25m, curve 5m；On pile cover top, whole stakes, prefabricated board are realized in mark signature drilling
Set before the stake pressing board of position, after plate, the stake is arranged on central lines of track.
The prefabricated board placed, installs the special adjustment frame of prefabricated board, one piece of prefabricated board is equipped with 4 adjustment on pre-embedded bolt
Frame is adjusted, and the adjustment frame is arranged on the lifting nut of prefabricated board, suspension ring is welded with the adjustment frame, for track-laying machine
Hanging, is also welded with the pressing element of fixed self-compacting concrete template in addition, is easy to Zhi Li and fixed self-compacting concrete template, described
Adjusting screw above and below being additionally provided with prefabricated board adjustment frame, the bottom plate of adjustment frame is fixed on bridge floor using expansion bolt.
When track-laying machine slings prefabricated board, prefabricated board is blown slowly by the installation guiding bar of setting and dropped to from bridge floor 30mm
When, it is overlapping fixed to adjust prefabricated board center according to the Center Line Marking person on the front and back position center target of bridge floor prefabricated board
Position.
Prefabricated board is installed in the base concrete after tunnel backfill, constitutes prefabricated board integrated sleeper bed together with rail fastening, in advance
Making sheet as rail supporting member.
Co-occurrence ballast construction method of the present invention is compared, and the advantage is that：
1st, prefabricated plate has that structure is relatively easy, outward appearance is clean and tidy, attractive in appearance, and construction is simple, efficiency high, reliable in quality
Deng outstanding advantages；
2nd, prefabricated plate is prefabricated in the factory, and its construction quality and progress disclosure satisfy that requirement；
3rd, construction operation amount is reduced in underground cable tunnel, and construction speed is very fast；
4th, the utilization of underground cable tunnel inner orbit construction human resources greatly reduces, and operation rate of machinery is fully improved, and saves
Substantial amounts of human resources, city underground quickly lay a railway track construction compared with traditional construction daily progress can improve 1~2 times；
5th, construction environment air pollution is few in underground cable tunnel.
[brief description of the drawings]
Fig. 1 is that ballast bed structure breaks in a kind of city track traffic engineering assembled laying method underground cable tunnel of the present invention
Face figure；
A kind of city track traffic engineering assembled that Fig. 2 is the present invention is laid a railway track the prefabricated plate structural representation of method
Figure；
A kind of city track traffic engineering assembled that Fig. 3 is the present invention is laid a railway track method assembled track installation fixation figure；
It is the Figure of abstract of the present invention to specify Fig. 1.
As illustrated, in figure：1. the inverted arch of 2. self-compacting concrete of precast track plate 3. backfills the positive stop lug boss 5. of layer 4.
The rail buttress 11. out of shape of rail 10. out of shape of 6. steel wire rope of track-laying machine, 7. suspension bracket, 8. suspension rod 9.Bolt 12. is adjusted
Frame
[embodiment]
The invention will be further described below in conjunction with the accompanying drawings, is very for the construction of this method people professional to this
Clearly.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
As shown in figure 1, in figure：From it is lower to it is upper be basis, flexible material, self-compacting concrete, assembled track respectively
Plate, fastener, rail.
As shown in Fig. 2 prefabricated plate is put down prefabricated board from railcar using track-laying machine on the rail out of shape laid
Operation side is transported in wooden handcart shipment of hanging oneself.
As shown in figure 3, the prefabricated board placed, the special adjustment frame of prefabricated board is installed on pre-embedded bolt, track-laying machine is utilized
Special hanger prefabricated board is sling together with special adjustment frame, guiding bar is installed by prefabricated board and prefabricated board is blown slowly put
In design and installation position, according to prefabricated Board position mark, position adjustment around prefabricated board in 10mm, and with expanding
Bolt fixes adjustment frame base, then removes track-laying machine suspender, and the three-dimensional position of prefabricated board is adjusted to design with adjustment frame
Within standard.
Tunnel Base is first carried out before assembled track laying on request without dabbing, rubbish, ponding need to be cleared up dry
Only, poured while carrying out base concrete.Base concrete strength meets and requires laggard row line disjunction mark, prefabricated Board position disjunction mark
Survey is set.Disjunction mark is located at the outside of circuit, at wire center 1.5m.Circuit Control benchmark：Set by straight line 120m, curve 50m.
Link encryption disjunction mark：Set by straight line 6.25m, curve 5m requirement.Whole stakes will drill in pile cover top mark signature.Surveying
If while anchor post, also to survey to set out by prefabricated board design attitude and.Set before prefabricated Board position stake pressing board, after plate,
The stake is arranged on central lines of track.
Prefabricated board front and back position line is marked in the very useful line of ink marker of structure base slab according to measuring plug, prefabricated board center line is laid a railway track
The graticules such as the machine rail track buttress position line.Then interim rail is installed according to graticule.
Prefabricated board is installed in the base concrete after tunnel backfill, and prefabricated board integrated sleeper bed is constituted together with rail fastening.In advance
Making sheet is as the supporting member of rail, and the position dimension of its appearance and size and built-in fitting etc. is most important.Therefore non-is required to template
Chang Yange.Template uses steel, and strengthens, with anti-deformation.Prefabricated board carries out prefabricated by the way of bottom surface is upward.Prefabricated board exists
The model dismounting of various preformed holes is pulled out after having some strength after concrete final set in prefabrication process.Concrete curing is used
Steam curing or moistening health.The lifting temperature of steam curing should comply with relevant regulations.Road bed board after the demoulding should also carry out three
Moistening health more than it.Prefabricated board is produced by qualified element precast factory.
The function of interim rail is track-laying machine is walked.Interim rail is made of the small rail of P24, and gauge is 3.1 meters.
Both sides are coupled with clamping plate between small rail.Interim rail is to have bad luck to use, and completes one section, one section is had bad luck forward.Interim traveling
Rail physical length is 300m.Interim rail will be firmly installed, it is ensured that track-laying machine operates steadily.
The transport of prefabricated board, which is divided in two kinds, i.e. ground transport and tunnel, transports.Ground transport：It is pre- that precasting yard is processed
Making sheet, tracklaying base is transported to automobile by highway, interim storage base storage pad.The stacking place of prefabricated board is smooth, in advance
Making sheet wood lump supporting pad, branch pad position is below lifting pre-embedded bolt, and prefabricated board, which must not stack, warping phenomenon, must not surpass per pile
Cross 4 layers.
Referring to Fig. 1, assembled track laying method sectional drawing.
Referring to Fig. 2, transported in tunnel, prefabricated board transport.
Referring to Fig. 3, the installation of prefabricated board.
Referring to Fig. 3, the prefabricated board placed installs the special adjustment frame of prefabricated board on pre-embedded bolt, utilizes track-laying machine
Special hanger is sling prefabricated board together with special adjustment frame, and prefabricated board is blown slowly by prefabricated board installation guiding bar and is placed in
Design and installation position, according to prefabricated Board position mark, position adjustment around prefabricated board in 10mm, and uses expanding screw
Bolt fixes adjustment frame base, then removes track-laying machine suspender, and the three-dimensional position of prefabricated board is adjusted to design mark with adjustment frame
Within standard.
Referring to Fig. 3, prefabricated board and line status adjustment and control.The adjustment of prefabricated board is adjusted using special prefabricated board
Frame is completed.Adjustment frame has the function that top to bottom, left and right, front and rear are adjusted in the range of 10mm.One block of plate is entered with 4 adjustment frames
Row adjustment.Adjustment frame is arranged on the lifting nut of prefabricated board.Suspension ring are welded with adjustment frame, for track-laying machine hanging, are gone back in addition
The pressing element of fixed self-compacting concrete template is welded with, is easy to Zhi Li and fixed self-compacting concrete template.When track-laying machine is prefabricated
Plate is sling, by install guiding bar prefabricated board is blown slowly be down to from bridge floor 30mm when, according to bridge floor prefabricated board front and back position in
Center Line Marking person on heart target is overlapping to adjust prefabricated board center.Prefabricated board front and back position is made pre- using ruler and angle square
Making sheet rear and front end is equidistant apart from stake centre-to-centre spacing.Then gently tighten the adjusting screw up and down of prefabricated board adjustment frame make it is prefabricated
Plate is supported on bridge floor.The bottom plate of adjustment frame is fixed on bridge floor using expansion bolt.Release the constraint of track-laying machine.Mobile paving
Trailer carries out the installation circulation of next piece of prefabricated board.Prefabricated board after coarse adjustment utilizes branch using survey tools such as dial gauge, rulers
The adjusting screw of support bottom comer carries out second of coarse adjustment.After adjustment is finished, the adjustment of next piece of prefabricated board is carried out.Work as prefabricated board
When adjustment length reaches 100m, this section of fastener, backing plate etc. are installed on prefabricated board, rail are lifted into using track-laying machine prefabricated
On fastener iron chair on plate, make that rail and fastener base plate etc. are closely connected using adjustment frame adjustment bolt adjustment prefabricated board, fastener is pressed
Design is well placed the gauge pad of rail both sides.Railway spike bolt and elastic bar fastener are tightened by prescribed torque.When rail and whole fasteners
After in place, accurate adjustment is carried out to the right position of line status and prefabricated board with right angle track forces, universal rail gage, tune after accurate adjustment in place
The adjustment bolt of whole frame is tightened, and completes the adjustment of prefabricated board and line status.
Referring to Fig. 1, the perfusion of self-compacting concrete.Various performances are carried out in accordance with regulations before perfusion in self-compacting concrete
It can be irrigated after test passes.The making of test block is carried out during perfusion.The injection of self-compacting concrete, should will not bring air into and blow slowly
Ground is carried out continuously, and will not also cause material segregation.
Referring to Fig. 1, the construction of ditch concrete.After railway roadbed self-compacting concrete intensity reaches requirement, ditch mould is carried out
The supporting of plate, water-filling ditch concrete of going forward side by side is poured.
Claims (10)
1. a kind of city track traffic engineering assembled track laying device, including basis, flexible material, self-compacting concrete,
Assembled track plates, fastener, rail, it is characterised in that the prefabricated board of prefabricated certain length, prefabricated board size be long 5330mm,
Wide 2400mm, thickness 260mm, the prefabricated board are described prefabricated provided with fastener and reinforcing bar, anti-fan stream terminal ballast bed structure material
Plate lays location by the underground cable ballast bed of track of transporting apparatus transports to track laying base, and prefabricated board is lifted and transported by track-laying machine
Transport to design attitude, using fixing device by prefabricated board fixation, carried out above prefabricated board self-compacting concrete perfusion and
Construct in ditch.
2. a kind of city track traffic engineering assembled track laying device as claimed in claim 1, it is characterised in that circuit
Outside be provided with circuit disjunction mark, at wire center 1.5m, circuit Control benchmark：Set by straight line 120m, curve 50m, circuit adds
Close disjunction mark：Set by straight line 6.25m, curve 5m；On pile cover top, whole stakes, prefabricated Board position stake pressing board are realized in mark signature drilling
Before, set after plate, the stake is arranged on central lines of track.
3. a kind of city track traffic engineering assembled track laying device as claimed in claim 1, it is characterised in that lay
Good prefabricated board, installs the special adjustment frame of prefabricated board on pre-embedded bolt, and one piece of prefabricated board is adjusted equipped with 4 adjustment frames,
The adjustment frame is arranged on the lifting nut of prefabricated board, and suspension ring are welded with the adjustment frame, for track-laying machine hanging, is gone back in addition
The pressing element of fixed self-compacting concrete template is welded with, is easy to Zhi Li and fixed self-compacting concrete template, the prefabricated board adjustment
Adjusting screw above and below being additionally provided with frame, the bottom plate of adjustment frame is fixed on bridge floor using expansion bolt.
4. a kind of city track traffic engineering assembled track laying device as claimed in claim 1, it is characterised in that pawnshop
Trailer slings prefabricated board, prefabricated board is blown slowly by the installation guiding bar of setting when dropping to from bridge floor 30mm, according to bridge floor
Center Line Marking person on the front and back position center target of prefabricated board is overlapping to adjust the positioning of prefabricated board center.
5. a kind of city track traffic engineering assembled track laying device as claimed in claim 1, it is characterised in that prefabricated
Plate is installed in the base concrete after tunnel backfill, and prefabricated board integrated sleeper bed is constituted together with rail fastening, and prefabricated board is used as rail
Supporting member.
6. a kind of city track traffic engineering assembled track laying method, it is characterised in that the prefabricated board of prefabricated certain length
Fastener and reinforcing bar, anti-fan stream terminal ballast bed structure material are subjected to prefabricated processing in precast plant, spread using Automobile Transportation to track
If base, transport underground cable ballast bed of track with railcar flat car and lay location, with track-laying machine by prefabricated board hoisting transportation to setting
Applied simultaneously using the fixing device processed by prefabricated board fixation in the perfusion of progress self-compacting concrete and ditch meter position
Work, substantial amounts of railway roadbed construction content is completed outside tunnel.
7. a kind of city track traffic engineering assembled track laying method as claimed in claim 6, it is characterised in that prefabricated
Plate carries out prefabricated by the way of bottom surface is upward, and the models of prefabricated board various preformed holes in prefabrication process is removed whole in concrete
Pulled out after there is some strength after solidifying, concrete curing is using steam curing or moistening health, and the lifting temperature of steam curing should
Comply with relevant regulations, the road bed board after the demoulding should also carry out the moistening health of more than three days.Prefabricated board is pre- by qualified component
Factory's production processed.
8. a kind of city track traffic engineering assembled track laying method as claimed in claim 6, it is characterised in that prefabricated
The method of adjustment of plate, prefabricated board is provided with prefabricated board adjustment frame, and the adjustment frame has top to bottom, left and right, front and rear in the range of 10mm
The function of adjustment, one block of plate is adjusted with 4 adjustment frames, and when track-laying machine slings prefabricated board, bar is guided pre- by installing
Making sheet blows slowly when being down to from bridge floor 30mm, according to the Center Line Marking person on the front and back position center target of bridge floor prefabricated board it is overlapping come
Adjust prefabricated board center.Prefabricated board front and back position makes prefabricated board rear and front end apart from stake centre-to-centre spacing using ruler and angle square
To be equidistant；Then gently tightening the adjusting screw up and down of prefabricated board adjustment frame makes prefabricated board be supported on bridge floor, utilizes expanding screw
Bolt is fixed on the bottom plate of adjustment frame on bridge floor；
The constraint of track-laying machine is released, mobile track-laying machine carries out the installation circulation of next piece of prefabricated board.Prefabricated board after coarse adjustment is used
The survey tools such as dial gauge, ruler carry out second of coarse adjustment using the adjusting screw of support frame bottom comer；
Adjustment finish after, carry out next piece of prefabricated board adjustment, when prefabricated board adjustment length reach 100m when, this section of fastener,
Backing plate etc. is installed on prefabricated board, and rail is lifted on the fastener iron chair on prefabricated board using track-laying machine, adjustment frame is utilized
Adjustment bolt adjustment prefabricated board makes rail and fastener base plate etc. closely connected, and fastener is well placed the gauge pad of rail both sides by design.Press
Prescribed torque tightens railway spike bolt and elastic bar fastener.When rail and whole fastener in place after, with right angle track forces, universal rail gage to line
The right position of line state and prefabricated board carries out accurate adjustment, and the adjustment bolt of adjustment frame is tightened after accurate adjustment in place, completes prefabricated board
With the adjustment of line status.
9. a kind of city track traffic engineering assembled track laying method as claimed in claim 6, it is characterised in that from close
The perfusion of real concrete, self-compacting concrete before perfusion, be carried out in accordance with regulations various performance tests it is qualified after can irrigate.Fill
The making of test block is carried out during note.The injection of self-compacting concrete, should will not bring air into and be carried out continuously insensibly, will not also cause
Material segregation.
10. a kind of city track traffic engineering assembled track laying method as claimed in claim 6, it is characterised in that water
The construction of ditch concrete, after railway roadbed self-compacting concrete intensity reaches requirement, carries out the supporting of ditch template, water-filling ditch of going forward side by side
Concrete is poured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710546154.4A CN107178010A (en) | 2017-07-06 | 2017-07-06 | A kind of city track traffic engineering assembled track laying device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710546154.4A CN107178010A (en) | 2017-07-06 | 2017-07-06 | A kind of city track traffic engineering assembled track laying device and method |
Publications (1)
| Publication Number | Publication Date |
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| CN107178010A true CN107178010A (en) | 2017-09-19 |
Family
ID=59846069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201710546154.4A Pending CN107178010A (en) | 2017-07-06 | 2017-07-06 | A kind of city track traffic engineering assembled track laying device and method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108316061A (en) * | 2018-01-31 | 2018-07-24 | 周兆弟 | A kind of installation method of track beam and its track foundation construction method |
| CN109371765A (en) * | 2018-11-19 | 2019-02-22 | 中铁第四勘察设计院集团有限公司 | Pass through the track deformation control structure in the Railway Tunnel of large-scale activity tomography |
| CN109518544A (en) * | 2018-12-29 | 2019-03-26 | 中铁五局集团第六工程有限责任公司 | A kind of subway precast track plate railway roadbed laying method |
| CN111074696A (en) * | 2020-01-03 | 2020-04-28 | 西南交通大学 | Assembly type tunnel track unit, assembly type tunnel track and deformation maintenance method thereof |
| CN112252087A (en) * | 2020-12-08 | 2021-01-22 | 安徽兴宇轨道装备有限公司 | Precast slab ballast bed construction method |
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