CN101215812B - Construction method for passenger transport dedicated line bolster embedded large-size ballastless track - Google Patents
Construction method for passenger transport dedicated line bolster embedded large-size ballastless track Download PDFInfo
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- CN101215812B CN101215812B CN2007100510108A CN200710051010A CN101215812B CN 101215812 B CN101215812 B CN 101215812B CN 2007100510108 A CN2007100510108 A CN 2007100510108A CN 200710051010 A CN200710051010 A CN 200710051010A CN 101215812 B CN101215812 B CN 101215812B
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Abstract
The invention discloses a construction method of long sleeper buried ballastless turnouts with large size of a passenger transport dedicated line, which comprises: constructing turnouts region base concrete, surveying and setting out of the construction, binding rail bed plate bottom reinforcement, installing a turnout translation trolley, hanging turnout rail sections and unloading, pushing the translation trolley in the position and connecting turnout, coarsely adjusting the turnout, installing a regulation stent and dissembling the translation trolley, binding rail bed plate reinforcement and installing a formwork, fine adjusting and positioning the turnout, pouring rail bed plate concrete, adjusting the formwork and dissembling the stent, welding the turnout steel rail and dispersing stress and closing treatments. The method of the invention has the advantages that the installed long sleeper buried ballastless steel rail panel of the passenger transportation dedicated line is stable and free from deformation; the rail concrete meets the requirements of China made rail circuit transmission; the rail is linear and is provided with high regularity and high accuracy of construction surveying and controlling; steel rail welding joint is of good quality and high regularity.
Description
Technical field
The present invention relates to a kind of laying method of railroad track, a kind of specifically construction method for passenger transport dedicated line bolster embedded large-size ballastless track that is exclusively used in.
Background technology
The switch structure of motorcycle track comprises parts such as seat concrete, railway roadbed board concrete, switch tie, fastener system and rail from bottom to top.
Passenger transport dedicated line bolster embedded large-size ballastless track has following characteristics:
(1), the rail parts are long, assembly precision height, section of track transportation difficulty.The longest parts of track switch can reach 30 meters to 55 meters usually, assemble the section of track in advance to transport routes, haulage vehicle, hoisting machine tool requirement height, and transportation and lifting, assembling process should guarantee that the track switch section of track is stable, indeformable.
(2), concrete is designed to high performance concrete under the sleeper, its structure must satisfy the requirement of Chinese standard track circuit transmission.According to the needs of Chinese standard track circuit transmission, cage of reinforcement adopts the tailormadepiston edge insulator to isolate in track switch railway roadbed board concrete and the seat concrete, to prevent producing stray electrical current and return curcuit between cage of reinforcement.
(3), track linearity, construction survey and the control accuracy requirement height of high ride.
(4), good, the smooth-going degree of steel rail weld joint quality is high.
The These characteristics of passenger transport dedicated line bolster embedded large-size ballastless track has determined it to have following technological difficulties when imbedding construction: the research of track switch whole Transporting and lifting, the on-the-spot transportation and erection equipment of track switch and technology, turnout survey and accurate adjustment control, track switch concreting, the welding of track switch rail aluminothermy and construction equipment and configuration, constructor's training etc.
Summary of the invention
The objective of the invention is to: provide a kind of installation cycle short, the passenger transport dedicated line bolster embedded large-size ballastless track method that installation accuracy and quality are high.
Technical scheme of the present invention is:
A kind of construction method for passenger transport dedicated line bolster embedded large-size ballastless track may further comprise the steps:
A, the construction of switch area seat concrete:
The switch area base adopts reinforced concrete structure, is trapezoidal layout with track switch is linear, and the switch area seat concrete waters smashes that to finish the back artificial smooth and receive slurry and wipe one's face, and inserts shear reinforcement, afterwards a pneumatic pick cutter mao seat concrete surface;
B, construction survey and setting-out:
The CPIII reference net of each 300m scope before and after the repetition measurement track switch, the shop trouble foundation pile of setting-out track switch frog, trouble tail, first, the bent burst curve origin and destination of trouble and changeover portion origin and destination, and press the 5m spacing and encrypt to circuit both sides 1.8m layout construction foundation pile, track switch outline sideline, concrete blinding installation site, vertical shift chassis walking rails center line, built-in fitting burial place, lateral adjustment support fixed point are identified;
C, colligation road bed board bottom layer of the reinforcing steel:
The seam slip film is laid on cleaning seat concrete surface, adopts semiproduct road bed board bottom layer of the reinforcing steel to install at the scene, and rebar spacing adopts the control of angle steel loose tool, and road bed board surface layer longitudinal reinforcement is placed on the bottom layer of the reinforcing steel top;
D, installation track switch translation chassis;
E, hanging of track switch section of track sections are unloaded:
The track switch section of track sling fall gently on the translation chassis, check the strong point, guarantee stressedly evenly afterwards the translation chassis to be pushed away the place of unloading, finish the track switch section of track piecemeal and unload by servostabilization;
F, push the in place and track switch of translation chassis and connect:
Push the translation chassis piecemeal to the track switch paving location, with the atresia anchor clamps track switch section of track is connected into integral body, to the side thigh and the straight strand section of track of the track switch side thigh section of track be dropped on the chassis simultaneously, switch tie connecting cleat and rail distance rod are installed, a side thigh and a straight strand section of track are connected into integral body;
G, track switch coarse adjustment:
According to the integrality that track switch is laid figure and laying standard inspection track switch rail, switch tie and fastener system, adjust switch tie position, gauge to design attitude;
According to shop trouble foundation pile, draw the string wire line, traversing frock pushes midline position with track switch on the adjustment translation chassis;
H, adjusting support install and the translation chassis is removed:
Symmetry is installed the lateral adjustment support in the both sides rail outside, the lateral adjustment support is a three-legged structure, with expansion bolt fixed pedestal is fixed on the seat concrete, before the adjusting, the lateral adjustment screw mandrel should be placed in the middle, the centering of track switch direction is adjusted at left and right sides symmetry carries out, and road along the line direction progressively adjusted, make track switch in the right direction and occupy the design center line on
Symmetry is installed the vertical adjustment device in the rail side, and supporting screw installs the PVC sleeve additional, and road along the line direction is adjusted to design elevation with the track switch section of track,
After finishing, lateral adjustment support, the installation of vertical adjustment device and debugging remove the translation chassis piecemeal;
I, the muscle colligation of railway roadbed slab and template are installed:
With the bottom layer of the reinforcing steel colligation, add transverse reinforcement and the together colligation surfacing steel bar of inserting in advance of longitudinal reinforcement again, reinforcing bar adopts plastic insulation card and Plastic Bandage isolation and fixing,
Installation side is to combined steel formwork, pre-buried expansion bolt fixed form on seat concrete, and two side templates are established lacing wire and are fixed, and goat fluting template is installed,
Between steel mesh reinforcement and template, establish plastic cushion or mortar cushion block to reserve the concrete cover position;
J, turnout fine adjustment location:
Use track detection car detect the track switch direction, just, the geometry morpheme index of level, gauge, determine accurate adjustment numerical value, adjustment vertical adjustment device, increase sleeper upper support bolt, by adjusting the height of bolt, accurate adjustment plays the level line trouble, makes track switch height, level satisfy limiting design value; Sliding bed platen is clear and definite to be sat flatly, and design standard is satisfied in the gap of backing plate and platen, and adjustment lateral adjustment screw mandrel is done local accurate adjustment to rail to transfiniting,
With the stock rail straight sides is that benchmark is adjusted gauge and offset distance, transfers offset distance to transfer gauge more earlier,
Adjust tongue, heart rail is closely connected and technical requirement on design is satisfied in iron gap, top, and point tongue, movable point frogs point mechanism are installed simultaneously, carries out the worker Electricity Federation and transfers, debugging finishes and removes nail and close point tongue and movable point frogs;
K, railway roadbed board concrete are built:
At first clean concrete blinding, coating release agent to the pvc pipe rubber belt sealing on supporting screw, the vertical adjustment device, adopts protective cover to hide track switch rail parts, switch tie face,
Preceding 2 hours of concreting, moistening to seat concrete and switch tie surface sprinkling, before the concreting, to switch tie surface sprinkling interfacial agents,
Concreting is poured into a mould linear to the track switch track simultaneously and the inspection position, and after the blocking the way siding generation micro-strain, adjust and recover,
After treating concrete initial set, remove the protective cover of covering on rail, switch tie, press polish is wiped one's face to concrete surface, and the surface drainage slope is set, and sprays curing agent at concrete surface;
L, template and adjusting support are removed:
After treating that concrete final set and intensity are greater than 5MPa, progressively unclamp and regulate support, supporting bracket and sleeper fastening bolt, adopt geotextiles that concrete surface is covered, watering maintenance 14 days,
After above-mentioned steps was finished 24 hours, stripping, adjusting support and supporting bracket adopted non-shrinkage concrete or mortar rehabilitating concrete surface defective;
M, track switch rail welding and destressing:
In the track switch and front and back rail welds with exothermic welding, imitative type sander polishing welding point, and ultrasonic flaw detector detects welding head quality,
After unclamping the switch sleeper fastener stop between stock rail and tongue is transferred to the centre position, tightens up fastener system afterwards, can finish the track switch destressing;
N, tail worker handle:
After track switch concreting was finished, the site clearing was by fastener system correction track switch track geometry size.
The passenger transport dedicated line bolster embedded large-size ballastless track rail of installing according to the inventive method has following having a few: the passenger transport dedicated line bolster embedded large-size ballastless track rail section of track of installation is stable, indeformable; Concrete satisfies the requirement of Chinese standard track circuit transmission under the sleeper; The track linearity has high ride, and construction survey and control accuracy require high; Good, the smooth-going degree of the steel rail weld joint quality of installing is high.
Description of drawings
Fig. 1 is a flow chart of the present invention.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
A kind of concrete construction process of passenger transport dedicated line bolster embedded large-size ballastless track method, its flow process may further comprise the steps as shown in Figure 1:
(1), switch area seat concrete construction:
The switch area base is the C30 reinforced concrete structure, be trapezoidal layout with track switch is linear, concrete adopts plant mixed concrete, continuous placing construction, and the switch area seat concrete waters smashes that to finish the back artificial smooth and receive to starch and wipe one's face, insert shear reinforcement, afterwards pneumatic pick cutter hair seat concrete surface.
(2), construction survey and setting-out:
Adopt the CPIII reference net of high precision total station, each 300m scope of electronic level repetition measurement track switch front and back, the shop trouble foundation pile of setting-out track switch frog, trouble tail, first, the bent burst curve origin and destination of trouble and changeover portion origin and destination, and press the 5m spacing and encrypt to circuit both sides 1.8m layout construction foundation pile, with the line of ink marker or paint track switch outline sideline, concrete blinding installation site, vertical shift chassis walking rails center line, built-in fitting burial place, lateral adjustment support fixed point etc. are identified.
(3), colligation road bed board bottom layer of the reinforcing steel:
The seam slip film is laid on cleaning seat concrete surface, adopts semiproduct road bed board bottom layer of the reinforcing steel to install at the scene, rebar spacing adopts the control of angle steel loose tool, to being in the part that influences follow-up constructions such as vertical shift chassis walking rails, bottom layer of the reinforcing steel can suitably be removed, or postpones construction.Afterwards, road bed board surface layer longitudinal reinforcement is placed on the bottom layer of the reinforcing steel top.
(4), track switch translation chassis is installed:
Because of road or landform restriction, large-tonnage vapour hangs section of track sections hanging bed behind road bed, uses track switch translation chassis segmentation longitudinal translation to paving location again.
Lay the position and the height of elevation, middle line computation translation stage car walking rails by the track switch design.Translation chassis walking rails adopts the 24kg/m steel rail laying, lays the square chock of thick 10cm below the track by the 1.0m spacing, and conventional spike is fixed, and short sleeper bed hedgehopping side chock is adopted in the roadbed location.Afterwards, chassis longeron and traveling portion, the horizontal beam of lifting are installed successively, afterwards installation in position equipment and traversing equipment from bottom to top.
(5), the transportation of track switch section of track sections:
With hydraulic module formula axis car or long trailer transportation track switch section of track sections.
(6), hanging of track switch section of track sections unloaded:
According to the difference of building site environment, can select separate unit or many large-tonnage vapour to hang and be equipped with special hanger and hang and unload track switch section of track sections.For example: track switch can select for use 300 tons of vapour of separate unit to hang, also can select for use 2 or 3 300 tons of vapour to hang according to the length difference of track switch, special hoisting bar is long not to be shorter than section of track length 6m, and track switch section of track suspension centre spacing is not more than 3.0m, and scratches rail with a special-purpose suspender belt and a pad to prevent suspender.
Track switch section of track lifting pre-determines constructor, haulage vehicle, large-tonnage vapour hangs and assist the layout and the work flow of facility, and lifting operation is strict with the predetermined scheme construction, and has the special messenger to command.
The track switch section of track is sling and is fallen gently on the translation chassis by servostabilization, checks the strong point, guarantee stressed evenly, the special messenger commands manually the translation chassis is pushed away the place of unloading afterwards, finishes the track switch section of track piecemeal and unloads.
(7), push the in place and track switch connection of translation chassis:
Push the translation chassis piecemeal to the track switch paving location, with the upright beginning of turnout of square chi and the point of switch, check track switch rail length and total length of turnout, with the atresia anchor clamps track switch section of track is connected into integral body, need drop on a side thigh and a straight strand section of track on the chassis simultaneously to the track switch side thigh section of track, switch tie connecting cleat and rail distance rod are installed, a side thigh and a straight strand section of track are connected into integral body.
(8), track switch coarse adjustment:
According to the integrality that track switch is laid figure and laying standard inspection track switch rail, switch tie and fastener system, adjust switch tie position, gauge etc.
According to spreading the trouble foundation pile, draw the string wire line, with the special-purpose chi of checking, traversing frock pushes midline position with track switch on the adjustment translation chassis.
48 indexs of track switch inner structure size are checked item by item and are adjusted to the right place the adjustment of switch point housing degree cooperates debugging by the electricity specialty of being engaged in.
(9), regulating support installation and translation chassis removes:
The track switch coarse adjustment is finished, and presses the 2m spacing and in the both sides rail outside symmetry lateral adjustment support is installed, and the lateral adjustment support adopts the three-legged structure design, with expansion bolt fixed pedestal is fixed on the seat concrete.Before the adjusting, the lateral adjustment screw mandrel should be placed in the middle, the centering of track switch direction is adjusted at left and right sides symmetry carries out, and road along the line direction progressively adjusts, and makes track switch in the right direction and occupy on the design center line.
Vertically stagger the lateral adjustment support at rail side symmetry installation vertical adjustment device by the 2m spacing, supporting screw installs the PVC sleeve additional, and road along the line direction is adjusted to design elevation with the track switch section of track.The railway frog position can suitably increase vertical adjustment device quantity.
The translation chassis is removed after lateral adjustment support, the installation of vertical adjustment device and debugging are finished piecemeal, from top to bottom be followed successively by and remove translation chassis crossbeam, longeron and travelling wheel, walking rails etc., the cleaning in time of rod member of removing and bolt, maintenance also store classifiedly, and wait until next time and use.
Employing 60kg/m instrument rail (new rail) assembling track switch front and back long sleeper buried-type non-fragment orbit transition rail saves and links together with the track switch section of track, and support, rail distance rod etc. are regulated in installation.
(10), colligation of railway roadbed slab muscle and template are installed:
After finishing the bottom layer of the reinforcing steel colligation, add transverse reinforcement and the together colligation surfacing steel bar of inserting in advance of longitudinal reinforcement again, the same with the seat concrete reinforcing bar, reinforcing bar need adopt plastic insulation card and Plastic Bandage isolation and fixing, to position because of vertical adjustment device, shear bar influence, can suitably adjust rebar spacing
Installation side is to combined steel formwork; pre-buried expansion bolt fixed form on seat concrete; two side templates are established lacing wire and are fixed; goat fluting template is installed; and check; establish plastic cushion or mortar cushion block to reserve the concrete cover position between steel mesh reinforcement and template, reinforcing bar binding finishes, and finishes Insulation test on request.
(11), turnout fine adjustment location:
Use track detection car detect the track switch direction, just, how much morpheme indexs such as level, gauge, detect data according to the GRP1000 track inspection car and determine accurate adjustment numerical value.
Adjust the vertical adjustment device, increase sleeper upper support bolt, by adjusting the height of bolt, accurate adjustment plays the level line trouble.Track switch height, level are no more than limiting design value.The clear and definite seat of sliding bed platen put down, and the gap of backing plate and platen does not exceed standard.
Adjust the lateral adjustment screw mandrel, rail is done local accurate adjustment to transfiniting.
When gauge and offset distance are adjusted, should be benchmark, according to transferring offset distance to transfer the step of gauge to reach designing requirement simultaneously more earlier to guarantee offset distance and gauge with the stock rail straight sides.
Adjust tongue, heart rail is closely connected and iron gap, top should with adjust gauge, offset distance combine, and makes the web of the rail of point of switch slit, the most advanced and sophisticated slit of heart rail, top iron and tongue, heart rail satisfy technical requirement on design.Point tongue, movable point frogs point mechanism are installed simultaneously, are carried out the worker Electricity Federation and transfer, debugging finishes and in time removes, and nail closes point tongue and movable point frogs.
(12), the railway roadbed board concrete is built:
The railway roadbed board concrete build be arranged in usually at dusk or carry on construction work at night (because of construction period on the occasion of summer), the concreting periodic Control should be avoided hot weather, rainy day construction between 6～8 hours.
Before the concreting, the cleaning concrete blinding, coating release agent to the pvc pipe rubber belt sealing on supporting screw, the vertical adjustment device, adopts protective cover to hide track switch rail parts, switch tie face, in order to avoid concrete pollutes.
Preceding 2 hours of concreting, moistening to seat concrete and switch tie surface sprinkling, before the concreting,,, reduce concrete cracks to increase adhesion stress between concrete and switch tie to switch tie surface sprinkling interfacial agents.
The railway roadbed board concrete adopts the transportation of plant mixed concrete, tank car, automotive pump to be pumped into the form of construction work that mould, machinery vibrate equally.Concreting should be advanced to the other end piecemeal by an end, and concrete directly injects in the inboard switch tie box of rail by mobile conduit, and the move left and right conduit.When second switch tie box inner concrete exceeds switch tie when bottom, can second switch tie box of mobile catheter perfusion, by that analogy.Artificial employing tooth harrow is taken off the crib inner concrete flat, even, and insertion is made rod firm by ramming and vibrated, and is strengthened vibrating in the sleeper bottom, guarantees concrete compaction, should prevent to make firm by ramming rod when making firm by ramming and collide vertical adjustment screw rod and other fastening devicess.
Concreting process arranges the special messenger to be responsible for the inspection of and position linear to the track switch track.After the blocking the way siding generation micro-strain, in time adjust and recover, when making the track switch distortion if regulate support to meet with accidental impact, concreting must stop at once, recovers after the inspection to be measured to build again.
After treating concrete initial set, in time remove the protective cover of covering on rail, switch tie, manually press polish is wiped one's face to concrete surface, utilizes special stand coordinative construction concrete that the surface drainage slope is set.Afterwards, spray curing agent at concrete surface.
(13), template and adjusting support are removed:
Treat concrete final set and intensity reach 5MPa above after, and before next day, the temperature rises, progressively unclamp and regulate support, supporting bracket and sleeper fastening bolt, different temperature deformation and cause the concrete surface crackle between back invar rail and concrete in order to avoid temperature rises.Afterwards, adopt geotextiles that concrete surface is covered, watering maintenance 14 days.
After the concreting 24 hours, stripping, adjusting support and supporting bracket.Adopt non-shrinkage concrete or mortar rehabilitating concrete surface defective.
During concrete curing, the works area should be sealed, and forbids pedestrian, vehicle to pass through on track switch.
(14), track switch rail welding and destressing:
In the track switch and front and back rail welds with the exothermic welding of French Rye platform gram, imitative type sander polishing welding point, ultrasonic flaw detector detection welding head quality.
According to the requirement of BWG railway points system construction, rail welding is in proper order in the track switch: the railway frog section of track and guide rail connecting portion, straight earlier strand, bent strand of back.Between guide rail and the guide rail, straight earlier strand, bent strand of back.Guide rail and tongue heel, first stock rail, back tongue.Rail welding order: Xian Chaqian before and after the track switch is again after the trouble.Straight earlier strand, bent again strand.
In the track switch during rail welding construction forbid to draw rail with stretcher.
Under the rail temperature condition of regulation, stop between stock rail and tongue is transferred to the centre position after unclamping the switch sleeper fastener, tighten up fastener system afterwards, can finish the track switch destressing, and displacement observation in time is set identifies.
Welding or trans-section seamless railway locking between track switch and front and back circuit rail are carried out after need rail stress diffuses in track switch.
(15), the tail worker handles:
After track switch concreting was finished, in time the site clearing by fastener system correction track switch track geometry size, was provided with track sign and road way signs.
Before the line clear, establish interim car bumper before and after the track switch, the straight thigh of track switch closes with the hook lock device nail and locks.
Claims (6)
1. construction method for passenger transport dedicated line bolster embedded large-size ballastless track may further comprise the steps:
A, the construction of switch area seat concrete:
The switch area base adopts reinforced concrete structure, is trapezoidal layout with track switch is linear, and the switch area seat concrete waters smashes that to finish the back artificial smooth and receive slurry and wipe one's face, and inserts shear reinforcement, afterwards a pneumatic pick cutter mao seat concrete surface;
B, construction survey and setting-out:
The CPIII reference net of each 300m scope before and after the repetition measurement track switch, the shop trouble foundation pile of setting-out track switch frog, trouble tail, first, the bent burst curve origin and destination of trouble and changeover portion origin and destination, and press the 5m spacing and encrypt to circuit two survey 1.8m layout construction foundation piles, track switch outline sideline, concrete blinding installation site, vertical shift chassis walking rails center line, built-in fitting burial place, lateral adjustment support fixed point are identified;
C, colligation road bed board bottom layer of the reinforcing steel:
The seam slip film is laid on cleaning seat concrete surface, adopts semiproduct road bed board bottom layer of the reinforcing steel to install at the scene, and rebar spacing adopts the control of angle steel loose tool, and road bed board surface layer longitudinal reinforcement is placed on the bottom layer of the reinforcing steel top;
D, installation track switch translation chassis;
E, hanging of track switch section of track sections are unloaded:
The track switch section of track sling fall gently on the translation chassis, check the strong point, guarantee stressedly evenly afterwards the translation chassis to be pushed away the place of unloading, finish the track switch section of track piecemeal and unload by servostabilization;
F, push the in place and track switch of translation chassis and connect:
Push the translation chassis piecemeal to the track switch paving location, with the atresia anchor clamps track switch section of track is connected into integral body, to the side thigh and the straight strand section of track of the track switch side thigh section of track be dropped on the chassis simultaneously, switch tie connecting cleat and rail distance rod are installed, a side thigh and a straight strand section of track are connected into integral body;
G, track switch coarse adjustment:
According to the integrality that track switch is laid figure and laying standard inspection track switch rail, switch tie and fastener system, adjust switch tie position, gauge to design attitude;
According to shop trouble foundation pile, draw the string wire line, traversing frock pushes midline position with track switch on the adjustment translation chassis;
H, adjusting support install and the translation chassis is removed:
Symmetry is installed the lateral adjustment support in the both sides rail outside, the lateral adjustment support is a three-legged structure, with expansion bolt fixed pedestal is fixed on the seat concrete, before the adjusting, the lateral adjustment screw mandrel should be placed in the middle, the centering of track switch direction is adjusted at left and right sides symmetry carries out, and road along the line direction progressively adjusted, make track switch in the right direction and occupy the design center line on
Symmetry is installed the vertical adjustment device in the rail side, and supporting screw installs the PVC sleeve additional, and road along the line direction is adjusted to design elevation with the track switch section of track,
After finishing, lateral adjustment support, the installation of vertical adjustment device and debugging remove the translation chassis piecemeal;
I, the muscle colligation of railway roadbed slab and template are installed:
With the bottom layer of the reinforcing steel colligation, add transverse reinforcement and the together colligation surfacing steel bar of inserting in advance of longitudinal reinforcement again, reinforcing bar adopts plastic insulation card and Plastic Bandage isolation and fixing,
Installation side is to combined steel formwork, pre-buried expansion bolt fixed form on seat concrete, and two side templates are established lacing wire and are fixed, and goat fluting template is installed,
Between steel mesh reinforcement and template, establish plastic cushion or mortar cushion block to reserve the concrete cover position;
J, turnout fine adjustment location:
Use track detection car detect the track switch direction, just, the geometry morpheme index of level, gauge, determine accurate adjustment numerical value, adjustment vertical adjustment device, increase sleeper upper support bolt, by adjusting the height of bolt, accurate adjustment plays the level line trouble, makes track switch height, level satisfy limiting design value; Sliding bed platen is clear and definite to be sat flatly, and design standard is satisfied in the gap of backing plate and platen, and adjustment lateral adjustment screw mandrel is done local accurate adjustment to rail to transfiniting,
With the stock rail straight sides is that benchmark is adjusted gauge and offset distance, transfers offset distance to transfer gauge more earlier,
Adjust tongue, heart rail is closely connected and technical requirement on design is satisfied in iron gap, top, and point tongue, movable point frogs point mechanism are installed simultaneously, carries out the worker Electricity Federation and transfers, debugging finishes and removes nail and close point tongue and movable point frogs;
K, railway roadbed board concrete are built:
At first clean concrete blinding, coating release agent to the pvc pipe rubber belt sealing on supporting screw, the vertical adjustment device, adopts protective cover to hide track switch rail parts, switch tie face,
Preceding 2 hours of concreting, moistening to seat concrete and switch tie surface sprinkling, before the concreting, to switch tie surface sprinkling interfacial agents,
Concreting is poured into a mould linear to the track switch track simultaneously and the inspection position, and after the blocking the way siding generation micro-strain, adjust and recover,
After treating concrete initial set, remove the protective cover of covering on rail, switch tie, press polish is wiped one's face to concrete surface, and the surface drainage slope is set, and sprays curing agent at concrete surface;
1, template and adjusting support are removed
After treating that concrete final set and intensity are greater than 5MPa, progressively unclamp and regulate support, supporting bracket and sleeper fastening bolt, adopt geotextiles that concrete surface is covered, watering maintenance 14 days,
After above-mentioned steps was finished 24 hours, stripping, adjusting support and supporting bracket adopted non-shrinkage concrete or mortar rehabilitating concrete surface defective;
M, track switch rail welding and destressing
In the track switch and front and back rail welds with exothermic welding, imitative type sander polishing welding point, and ultrasonic flaw detector detects welding head quality,
After unclamping the switch sleeper fastener stop between stock rail and tongue is transferred to the centre position, tightens up fastener system afterwards, finish the track switch destressing;
N, tail worker handle
After track switch concreting was finished, the site clearing was by fastener system correction track switch track geometry size.
2. construction method for passenger transport dedicated line bolster embedded large-size ballastless track according to claim 1 is characterized in that, in the e step, the track switch section of track dot spacing of hanging oneself is not more than 3.0m, is provided with a pad at the suspension centre place.
3. construction method for passenger transport dedicated line bolster embedded large-size ballastless track according to claim 1 is characterized in that, in the h step, presses the 2m spacing and in the both sides rail outside symmetry lateral adjustment support is installed.
4. construction method for passenger transport dedicated line bolster embedded large-size ballastless track according to claim 1 is characterized in that, in the h step, increases vertical adjustment device quantity in the railway frog position.
5. construction method for passenger transport dedicated line bolster embedded large-size ballastless track according to claim 1 is characterized in that, in k step railway roadbed board concrete was built, the railway roadbed board concrete pouring construction cycle, environment temperature was not more than 30 ℃ during construction at 6～8 hours.
6. construction method for passenger transport dedicated line bolster embedded large-size ballastless track according to claim 1, it is characterized in that in m step track switch rail welding and destressing, rail welding is in proper order in the track switch: the railway frog section of track and guide rail connecting portion, straight earlier strand, bent strand of back; Between guide rail and the guide rail, straight earlier strand, bent strand of back; Guide rail and tongue heel, first stock rail, back tongue; Rail welding order: Xian Chaqian before and after the track switch is again after the trouble; Straight earlier strand, bent again strand.
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| CN2007100510108A CN101215812B (en) | 2007-12-27 | 2007-12-27 | Construction method for passenger transport dedicated line bolster embedded large-size ballastless track |
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| CN101691726A (en) * | 2009-09-04 | 2010-04-07 | 中铁四局集团有限公司 | Construction technology of double-block type ballastless track |
| CN101736662B (en) * | 2009-12-30 | 2011-05-11 | 中铁八局集团有限公司 | Network layout method of control foundation pile |
| CN101812819B (en) * | 2010-04-28 | 2012-03-28 | 中铁二十局集团有限公司 | Whole construction process for double block type ballastless track |
| CN105803876A (en) * | 2014-12-29 | 2016-07-27 | 中铁二局工程有限公司 | Switch rail and frog track-lifting auxiliary device and installation and construction method thereof |
| CN104631231B (en) * | 2015-01-04 | 2017-05-10 | 中铁四局集团有限公司 | Construction method for breaking and removing monolithic track bed in subway operation line tunnel |
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