CN107460794A - One kind is in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III - Google Patents
One kind is in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III Download PDFInfo
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- CN107460794A CN107460794A CN201710272905.8A CN201710272905A CN107460794A CN 107460794 A CN107460794 A CN 107460794A CN 201710272905 A CN201710272905 A CN 201710272905A CN 107460794 A CN107460794 A CN 107460794A
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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
Abstract
The present invention relates to a kind of construction method of the CRTSIII plate-type non-fragment orbit prefabricated boards in severe cold area, comprise the following steps：Insulating reinforcing steel bars are processed, and reinforced mesh makes, reinforced mesh installation, bed die is cleared up, releasing agent spraying, service sleeve and spiral bar installation, reinforcing bar enters mould, tensioning operation, concreting, steam curing, put and open, be stripped, track plates sealing off and covering anchorage, conserved in track plates water, track plates, which are stood, to be dried, sealing compound sprays, buffer area storage, is deposited in field.Beneficial effects of the present invention are：The prefabricated construction method of the plate-type fragment-free track slabs of CRTS III of the present invention solves prior art in severe cold area prefabricated the defects of easily causing track plates that frost heaving failure and contraction distortion occurs, quality assurance is provided for the prefabricated of plate-type fragment-free track slab of severe cold area CRTS III, there is wide applicability.
Description
Technical field
The present invention relates to the plate-type fragment-free track slab precast construction methods of CRTS III, and in particular to one kind is in severe cold area
The plate-type fragment-free track slab precast construction methods of CRTS III.
Background technology
CRTSIII type track plates stability with China's independent intellectual property right is high, ride comfort is good, maintenance capacity is low, in iron
Vital effect is served in the construction of road, in recent years the special line for passenger trains of national construction energetically, CRTSIII type rails
Guidance tape has been used widely." power's strategy of made in China 2025 " sets up mesh for railway construction in China unit
Mark, promotes the fast development of high-speed railway, and the CRTSIII plate-types fragment-free track slab of China's independent research is released into the gateway of a country to iron
Road construction unit proposes higher requirement in construction quality, construction period and engineering efficiency.CRTSIII type rail plate longs
Spend for 5600mm, width 2500mm, thickness 200mm, single piece plate weighs 8t.Because CRTSIII types track plates are new rail
Guidance tape, its working procedure up to more than 40 roads, it is required for being rigid in checking up on links, is needed in control with convenient, fast and smart
Standard is constantly innovated to ensure product quality and prefabricated progress for target.
1st Engineering Co.ltd. ,China Railway 4th Bureau Group Chengde making sheet field is located at Chengde County Liu Gou towns Zhong Liugou villages, mainly holds
Carry on a shoulder pole the prefabricated and transport of 47618 pieces of CRTS type III track plates in the special kilometer range of I~VI bid section 135.994 of Beijing-Shenyang capital Ji visitor
Task.CRTSIII type track plates be using bidirectional pre-tensioned prestressed reinforced concrete construction, using in steam curing, water maintenance and from
So conserve maintaining process being combined etc..For the track plates feature, prefabricated flow is divided into insulating reinforcing steel bars processing, reinforced mesh system
Make, reinforced mesh installation, bed die cleaning, releasing agent spraying, service sleeve and spiral bar installation, reinforcing bar enter mould, tensioning operation, mixed
Solidifying soil pours, steam curing, puts and opens, is stripped, track plates sealing off and covering anchorage, conserved in track plates water, is deposited in field.But due to Chengde track
North cold area at plate place, -14~-2 DEG C of winter daily mean temperature is most cold reachable less than -20 DEG C, prefabricated workshop and outer shroud
The border temperature difference is larger, easily causes track plates that frost heaving failure and contraction distortion occurs.The country carries out prefabricated without the big temperature difference herein
Precedent, carry the previous year plus Beijing-Shenyang line duration that is open to traffic so that my field is needed to carry out operation in the winter time, and pole is brought to prefabricated construction
Big difficulty.Therefore, it is imperative to invent a kind of prefabricated construction method of severe cold area CRTSIII plate-type fragment-free track slabs.
The content of the invention
It is an object of the invention to provide a kind of CRTSIII plate-type non-fragment orbit prefabricated constructions suitable for severe cold area
Method.
To achieve these goals, technical scheme provided by the invention is：It is a kind of the plate-types of severe cold area CRTS III without
Tiny fragments of stone, coal, etc. track precast construction method, comprises the following steps：
Step 1：Insulating reinforcing steel bars are processed, it would be desirable to which the reinforcing bar for carrying out insulation processing penetrates Insulating heat shrink, will after penetrating
Reinforcing bar is placed on heat-shrinkable T bush positioning tool, and Insulating heat shrink is caught in heat-shrinkable T bush positioning tool locating slot, afterwards
Heated, made on the tightly embedded reinforcing bar of Insulating heat shrink using heat shrink wrapping machine；
Step 2：Reinforced mesh is made, and reinforcing bar colligation is carried out on steel bar binding clamping fixture, forms reinforced mesh；
Step 3：Reinforced mesh is installed, and hoisting steel mesh piece is entered on side form, penetrates deformed bar, and installs lifting
Sleeve pipe and tension rod；
Step 4：Bed die is cleared up, and other attachments such as the residual quarrel of concrete block of bed die residual is cleared up, afterwards the bottom of along
Mould is longitudinally cleared up；
Step 5：Releasing agent is sprayed, releasing agent spraying is carried out to bed die and side form, and remove unnecessary hydrops；
Step 6：Service sleeve and spiral bar installation, service sleeve and bottom mould postioning pin are aligned, will be pre-buried with rubber hammer
Sleeve pipe is vertically pounded tightly, and according to big head-down principle, spiral bar is screwed on service sleeve；
Step 7：Reinforcing bar enters mould, and the side form for installing reinforced mesh is closed up with bed die；
Step 8：Tensioning operation, is divided into initial tensioning and whole tensioning, and initial tensioning carries out single steel bar using initial tensioning dolly
Draw, whole tensioning, deformed bar integral tension is carried out using digital control system；
Step 9：Concreting, it is determined that after severe cold area concrete construction match ratio, pass through concrete conveyance system
System, concrete distributing system carry out the concreting of the type track plates of CRTS III, and are shaken using the vibrating motor on bed die
Smash；
Step 10：Steam curing, after laying temperature sensing probe, installation steam curing support, steam curing tarpaulin, moisturizing
Pipeline construction, it is controlled by temperature control system regulation quantity of steam and steam curing data uploads, after steam curing terminates, led to
Cross moisturizing pipeline and carry out the type track plate surface moisturizings of CRTS III；
Step 11：To put and open and be stripped, reach 48MPa in concrete strength, modulus of elasticity is not less than 3.4 × 104MPa,
When the type track plates surface temperatures of CRTS III are less than 15 DEG C with ambient temperature differences, are put and opened using tensioning digital control system progress prestressing force,
Put and tension rod and the connecting bolt of side form and bed die removed after the completion of opening, and side form is slowly lifted off bed die using liftout attachment,
The separation of side form and the type track plates of CRTS III is completed on dismounting platform；
Step 12：Sealing off and covering anchorage, interfacial agents are sprayed in the prestressed pore passage of the type track plates of CRTS III, entered using pneumatic anchor rifle
Row sealing off and covering anchorage mortar injection, is vibrated after the completion of perfusion using pneumatic hammer；
Step 13：Conserved in water, the type track plates of CRTS III that sealing off and covering anchorage is completed are placed in into Shui Yang areas enters in water-filling to conserve；
Step 14：Standing is dried, and the water in the independent pond (16a) that will deposit the foster three days track plates of water is drained, and is started
Vapour system stand and air-dried, until the type track plate surface water stain-frees of CRTS III；
Step 15：Sealing compound is sprayed, service sleeve hole is blocked using vinyl cover, and start the spray of sealing compound
Apply；
Step 10 six：Buffer area is deposited, and type track plate transporting to the buffer areas of CRTS III for having sprayed sealing compound are deposited；
Step 10 seven：Deposit in, when the type track plates surface temperature differences of CRTS III are not more than 15 DEG C with circumstance of temperature difference, utilize
Track plate transport vehicle deposits track plate transporting to Cun Ban areas.
Preferably, the making of the reinforced mesh described in step 2 is specifically, colligation bottom layer of the reinforcing steel first, colligation to 1/2
Opening position, steel bar binding clamping fixture is rotated, completes remaining bottom layer of the reinforcing steel colligation, secondly cableway, last colligation top layer steel are installed
Muscle and side reinforcing bar, stirrup is vertical with cage bar during colligation, and for intersection point point by point using insulation tied silk colligation, lashing location is isolating shrinkable
Cannula center.
Preferably, initial tensioning described in step 8 carries out initial tensioning using 2 initial tensioning dollies, and one is arranged on stretching bed
The horizontal fixing end of seat, one is arranged on vertical fixing end, and the 30% of single tendon stretch presstressed reinforcing steel to tension control values, deviation is less than
3.0KN。
Preferably, whole tensioning described in step 8 drives stretch-drawing beam, tensioning longeron to carry out by controlling jack, eventually
Based on stretching force reading, Extension Values of Prestress Reinforcements is checked for tensioning, and control is stretched to by operating the control of automatic Tensioning system
It is worth and keeps stretching force stable, after the completion of whole tensioning, locks mechanical lock.
Preferably, the concreting described in step 9 is expected specifically, being discharged by blending station feed opening to concrete
Bucket carries out feeding, is transported concrete discharging hopper to transporting above grey dolly using concrete transportation track, is hung with purlin by coagulation
Native scrap steel container hangs in material distributing machine, and starts cloth.
Preferably, three layers of the cloth point is uniform, disperses to carry out:First layer cloth 10cm is thick, by frequency 100hz, frequency
Rate 110hz, frequency 90hz are vibrated, and each stage vibrating time is respectively 20s, 40s, 20s；Second layer cloth 8cm is thick, and
Vibrated by frequency 100hz, frequency 110hz, frequency 90hz, each stage vibrating time is respectively 20s, 40s, 20s；3rd
Layer cloth 2cm is thick, and vibrate 30s, frequency 100hz.
Preferably, steam curing process described in step 10 is divided into standing, heating, constant temperature, cooling four-stage, the steaming
The vapour maintenance stage carries out a moisturizing per half an hour, and hole for water spraying direction nebulizes injection towards track plate bottom, the moisturizing time
For 7s.
Preferably, sealing off and covering anchorage, the recessed type track plates sides of CRTS III of sealing off and covering anchorage depth are carried out after the completion of the interfacial agents spraying
0-4mm。
Preferably, in water described in step 13 curing time within the type track plates demolding of track slab 4h of CRTS III, envelope
After anchor completes 2h, curing time is 3 days in the water, and not less than 10 DEG C, the difference of track plates surface temperature and water temperature is less than water temperature
10℃。
Preferably, described in step 10 seven in field storage specifically, with track plate transport vehicle by the type track plates of CRTS III from
Buffer area is transported to storage area in field, is deposited by the way of vertically standing up, when the type track plates of CRTS III are stood up using connecting plate with
Connecting bolt or limiting card connect the adjacent type track plates of two pieces of CRTS III, track plates is connected into an entirety, the types of CRTS III
Track plates storage termination is provided with overturning-preventing support frame, and first piece of type track plates of CRTS III is connected on support frame, after the completion of storage
Cover tarpaulin insulation.
Compared with prior art, beneficial effects of the present invention are：
(1) the prefabricated construction method of the plate-type fragment-free track slabs of CRTS III of the invention solves prior art in severe cold
The defects of area is prefabricated easily to cause track plates that frost heaving failure and contraction distortion occurs is the plate-types of severe cold area CRTS III without tiny fragments of stone, coal, etc. rail
The prefabricated of guidance tape provides quality assurance, has wide applicability.
(2) the automatic Tensioning system of the plate-type fragment-free track slab precast construction methods of CRTS III of the invention, steam curing
System, automatic vibrating system, concrete transportation system, concrete distributing system, track plates precision is greatly improved, is improved
The track plates quality of production.
(3) the steam water temperature of the plate-type fragment-free track slab precast construction methods of CRTS III of the invention automatically adjusts water and supports system
System, ensure that severe cold area track plates water supports quality, track plates is reached sufficient water and supports effect；Track plates steam dries mode
Track plates are made not damaged because prefabricated workshop differs track plates caused by ambassador's track plates surface freezes with caching workshop or environment temperature
It is bad, prevent potential safety hazard.
Brief description of the drawings
Fig. 1 is insulating reinforcing steel bars machining sketch chart of the present invention.
Fig. 2 is heat-shrinkable T bush positioning tool schematic diagram of the present invention.
Fig. 3 is reinforcing bar colligation schematic diagram of the present invention.
Fig. 4 is reinforced mesh schematic diagram of the present invention.
Fig. 5 is making sheet mould schematic diagram of the present invention.
Fig. 6 is making sheet mould side view of the present invention.
Fig. 7 is bottom mould postioning pin schematic diagram of the present invention.
Fig. 8 is service sleeve schematic diagram of the present invention.
Fig. 9 is intended to for initial tensioning dolly operation of the present invention.
Figure 10 is the type track plate surfaces of CRTS III of the present invention and side structure schematic diagram.
Figure 11 is the type track plates bottom surface structure schematic diagrames of CRTS III of the present invention.
Figure 12 is that side form of the present invention dismounts platform structure schematic diagram with track plates.
Figure 13 is that water of the present invention supports pond absolute construction schematic diagram.
Figure 14 supports storage schematic diagram for the independent pond track plates water of the present invention.
Figure 15 is the independent pond vapour system structural representation of the present invention.
Figure 16 is track plate transport vehicle structural representation of the present invention.
Figure 17 is construction method flow chart of the present invention.
Wherein, 1, reinforcing bar, 2, Insulating heat shrink, 3, heat-shrinkable T bush positioning tool, 4, heat shrink wrapping machine, 5, reinforcing bar colligation tire
Tool, 6, reinforced mesh, 7, side form, 8, tension rod, 9, bed die, 9a, connecting bolt, 10, service sleeve, 11, bottom mould postioning pin,
12nd, initial tensioning dolly, 15, nut, 13, the type track plates of CRTS III, 13a, prestressed pore passage, 13b, service sleeve hole, 14, tear open
Assembling platform, 16, Shui Yang areas, 16a, independent pond, 17, vapour system, 18, track plate transport vehicle.
Embodiment
The present invention is described in detail with reference to the accompanying drawings and detailed description.
A kind of construction method prefabricated in the plate-type fragment-free track slabs of severe cold area CRTS III, comprises the following steps：
Step 1：Insulating reinforcing steel bars are processed, it would be desirable to which the reinforcing bar 1 for carrying out insulation processing penetrates Insulating heat shrink 2, after penetrating
Reinforcing bar 1 is placed on heat-shrinkable T bush positioning tool 3, and Insulating heat shrink 2 is caught in the locating slot of heat-shrinkable T bush positioning tool 3
In, heated, made on the tightly embedded reinforcing bar 1 of Insulating heat shrink 2 using heat shrink wrapping machine 4 afterwards.Insulating reinforcing steel bars are processed, and are by such as
What under type was processed：Insulating heat shrink 2 is penetrated need to carry out 5#, 6# of pyrocondensation processing, 7#, 8#, 11#, 13#,
In 14# reinforcing bars, and reinforcing bar is put into the heat-shrinkable T bush positioning tool 3 of corresponding model, makes end reinforced and frock end pair
Together, the positioning of Insulating heat shrink 2 is completed, now the position of Insulating heat shrink 2 can meet the deviation ± 5mm of code requirement.Open
When moving heat shrink wrapping machine 4, and setting pyrocondensation 8#, 13#, 14# reinforcing bar, by pyrocondensation temperature setting at 270~300 DEG C；When pyrocondensation 5#, 6#,
When 7#, 11# reinforcing bar, by pyrocondensation temperature setting at 230~250 DEG C, interior axle rotary speed controls 6.0-7.0m/min.
Step 2：Reinforced mesh 6 is made, and reinforcing bar colligation is carried out on steel bar binding clamping fixture 5, forms reinforced mesh 6；Reinforcing bar
Mesh sheet 6 makes, and carries out as follows：The colligation of reinforced mesh 6, first colligation are carried out on the steel bar binding clamping fixture 5
Bottom layer of the reinforcing steel, at colligation to 1/2 front and back position, steel bar binding clamping fixture 5 is rotated, completes remaining bottom layer of the reinforcing steel colligation.Secondly install
Cableway, last colligation top layer reinforcing bar and side reinforcing bar；Stirrup is vertical with cage bar during colligation, and intersection point is point by point using insulation tied silk
Colligation, lashing location are the center of Insulating heat shrink 2.
Step 3：Reinforced mesh 6 is installed, and reinforced mesh 6 is lifted on side form 7, penetrates deformed bar, and install
Hanging sleeve pipe and tension rod 8.
Step 4：Bed die 9 is cleared up, and other attachments such as residual quarrel of the concrete block remained with perching knife to bed die 9 are cleared up,
Cleared up afterwards along the longitudinal direction of bed die 9.
Step 5：Releasing agent is sprayed, releasing agent spraying is carried out to bed die 9 and side form 7, and remove unnecessary hydrops.
Step 6：Service sleeve 10 and spiral bar installation, service sleeve 10 and bottom mould postioning pin 11 are aligned, use rubber
Hammer vertically pounds service sleeve 10 tight.According to big head-down principle, spiral bar is screwed on service sleeve 10.
Step 7：Reinforcing bar enters mould, and the side form 7 for installing reinforced mesh 6 is closed up with bed die 9.
Step 8：Tensioning operation, it is divided into initial tensioning and whole tensioning, initial tensioning is using 2 initial tensioning dollies 12 to horizontal fixation
End and vertical fixing end carry out single steel bar tensioning, and locking nut 15.During whole tensioning, deformed bar is carried out using digital control system
Integral tension, stretch-drawing beam, tensioning longeron is driven to complete by controlling jack；Tensioning operation, it is to carry out as follows
's：Carry out initial tensionings using 2 initial tensioning dollies 12 first, one is arranged on the horizontal fixing end of stretching bed seat, one be arranged on it is vertical
Fixing end.During initial tensioning, 30% (24KN) of single tendon stretch presstressed reinforcing steel to tension control values, deviation not should be greater than 3.0KN,
And locking nut 15.Real time data inspecting is carried out in the automatic Tensioning system of cable tensios control room.Afterwards by control jack come
Stretch-drawing beam, tensioning longeron is driven to carry out whole tensioning.Based on stretching force reading, Extension Values of Prestress Reinforcements is checked for whole tensioning,
Controlling value (horizontal 960KN, longitudinal 1280KN) is stretched to by operating the control of automatic Tensioning system and keeps stretching force stable
(holding lotus 1min), after the completion of whole tensioning, mechanical lock is locked in time.Extension Values of Prestress Reinforcements, according to P5600, P4925, P492B,
Five kinds of CRTS III type track plates, 13 circulars such as P4856, P370 are as follows：
Step 9：Concreting, it is determined that after severe cold area concrete construction match ratio, pass through concrete conveyance system
System, concrete distributing system carry out the concreting of the type track plates 13 of CRTS III, and are carried out using the vibrating motor on bed die 9
Vibrate；Concreting, carry out as follows：Before concreting to the temperature of concrete batching system, the slump and
Air content is checked.The slump is between 80mm~140mm.First by blending station feed opening to concrete discharging hopper
Feeding is carried out, is transported concrete discharging hopper to transporting above grey dolly using concrete transportation track, being hung afterwards with purlin will be mixed
Coagulate native scrap steel container and hang in material distributing machine, and start cloth.Three layers of cloth point is uniform, disperses to carry out:First layer cloth 10cm is thick, and
Vibrated by frequency 100hz, frequency 110hz, frequency 90hz, each stage vibrating time is respectively 20s, 40s, 20s.Second
Layer cloth 8cm is thick, and is vibrated by frequency 100hz, frequency 110hz, frequency 90hz, and each stage vibrating time is respectively
20s、40s、20s.Third layer cloth 2cm is thick, and vibrate 30s, frequency 100hz.
Step 10：Steam curing, after laying temperature sensing probe, installation steam curing support, steam curing tarpaulin, moisturizing
Pipeline construction, it is controlled by temperature control system regulation quantity of steam and steam curing data uploads.After steam curing terminates, lead to
Cross moisturizing pipeline and carry out the surface moisturizing of III type track plates of CRTS 13；Steam curing, carry out as follows：Whole steam-cured mistake
Journey is divided into standing, heating, constant temperature, cooling four-stage.Carry out a moisturizing, spray per half an hour in the steam curing stage simultaneously
Water hole direction nebulizes injection towards track plate bottom, and the moisturizing time is 7s.
Step 11：To put and open and be stripped, reach 48MPa in concrete strength, modulus of elasticity is not less than 3.4 × 104MPa,
When the surface temperature of III type track plates of CRTS 13 is less than 15 DEG C with ambient temperature differences, carries out prestressing force using tensioning digital control system and put
, the connecting bolt 9a that tension rod 8 and side form 7 and bed die 9 are removed after the completion of opening is put, and it is using 4 jack that side form 7 is slow
It is lifted off bed die 9.The separation of side form 7 and the type track plates 13 of CRTS III is completed on dismounting platform 14.
Step 12：Sealing off and covering anchorage, interfacial agents are sprayed in the prestressed pore passage 13a of the type track plates 13 of CRTS III, using pneumatic
Anchor rifle carries out sealing off and covering anchorage mortar injection, is vibrated after the completion of perfusion using pneumatic hammer；The sealing off and covering anchorage mentioned, it is to carry out as follows
's：Track plates sealing off and covering anchorage uses quick sealing off and covering anchorage mortar, and mixing ratio is siccative：Latex：Water=100：9：3.7.Using strong during mixing
Standard mixer mixing, mixer rotating speed are not less than 180r/min, and mixing time is in more than 3min.Before sealing off and covering anchorage mortar tamps, adopt
Prestressed pore passage 13a is cleared up with high pressure air rifle, must not have in prestressed pore passage 13a after cleaning greasy dirt, laitance (dirt),
Debris and ponding, and interfacial agents are sprayed, use anchor rifle sealing off and covering anchorage, the recessed type tracks of CRTS III of sealing off and covering anchorage depth after the completion of interfacial agents spraying
The side 0mm-4mm of plate 13.
Step 13：Conserved in water, the type track plates 13 of CRTS III that sealing off and covering anchorage is completed are placed in into Shui Yang areas 16 enters in water-filling to support
Shield；Conserve in water, carry out as follows：After curing time is within demolding of track slab 4h, sealing off and covering anchorage completes 2h.When water is supported
Between be 3 days, water temperature be not less than 10 DEG C.The difference of track plates surface temperature and maintenance water temperature not should be greater than 10 DEG C.
Step 14：Standing is dried, and the water in the independent pond 16a that will deposit the foster three days track plates of water is drained, and is started and is steamed
Vapour system 17 stand and air-dried, until the surface water stain-free of III type track plates of CRTS 13.
Step 15：Sealing compound is sprayed, service sleeve hole 13b is blocked using vinyl cover, and start sealing compound
Spraying.
Step 10 six：Buffer area is deposited, and the type track plates 13 of CRTS III for having sprayed sealing compound are transported into buffer area and deposited
Put.
Step 10 seven：Deposited in, when the surface temperature difference of III type track plates of CRTS 13 is not more than 15 DEG C with circumstance of temperature difference, profit
Track plate transporting to Cun Ban areas is deposited with track plate transport vehicle 18.Deposit in, carry out as follows：Use track plate transporting
Track plates are transported to storage area in field from buffer area and deposited by the way of vertically standing up by defeated car 18.Using company when track plates are stood up
Adjacent two pieces of track plates are connected by fishplate bar with connecting bolt 9a or limiting card, track plates is connected into an entirety.Track plates are deposited
Good overturning-preventing support frame should be had by putting termination, and first piece of track plates is connected on support frame, and tarpaulin is covered after the completion of storage and is protected
Temperature.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (10)
1. one kind is in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, it is characterised in that comprises the following steps：
Step 1：Insulating reinforcing steel bars are processed, it would be desirable to which the reinforcing bar (1) for carrying out insulation processing penetrates Insulating heat shrink (2), after penetrating
Reinforcing bar (1) is placed on heat-shrinkable T bush positioning tool (3), and Insulating heat shrink (2) is caught in heat-shrinkable T bush positioning tool (3)
In locating slot, heated, made on the embedded reinforcing bar (1) of Insulating heat shrink (2) using heat shrink wrapping machine (4) afterwards；
Step 2：Reinforced mesh is made, and reinforcing bar colligation is carried out on steel bar binding clamping fixture (5), forms reinforced mesh (6)；
Step 3：Reinforced mesh is installed, and reinforced mesh (6) is lifted on side form (7), penetrates deformed bar, and install
Hanging sleeve pipe and tension rod (8)；
Step 4：Bed die is cleared up, and other attachments such as the residual quarrel of concrete block of bed die (9) residual is cleared up, afterwards the bottom of along
Mould (9) is longitudinally cleared up；
Step 5：Releasing agent is sprayed, releasing agent spraying is carried out to bed die (9) and side form (7), and remove unnecessary hydrops；
Step 6：Service sleeve and spiral bar installation, service sleeve (10) and bottom mould postioning pin (11) are aligned, will with rubber hammer
Service sleeve is vertically pounded tightly, and according to big head-down principle, spiral bar is screwed on service sleeve；
Step 7：Reinforcing bar enters mould, and the side form (7) for installing reinforced mesh (6) is closed up with bed die (9)；
Step 8：Tensioning operation, it is divided into initial tensioning and whole tensioning, initial tensioning carries out single steel bar tensioning using initial tensioning dolly,
Whole tensioning, deformed bar integral tension is carried out using digital control system；
Step 9：Concreting, it is determined that after severe cold area concrete construction match ratio, by concrete conveying system,
Concrete distributing system carries out the concreting of the type track plates of CRTS III, and is shaken using the vibrating motor on bed die (9)
Smash；
Step 10：Steam curing, after laying temperature sensing probe, installation steam curing support, steam curing tarpaulin, moisturizing pipeline
Set up, be controlled by temperature control system regulation quantity of steam and steam curing data upload, after steam curing terminates, pass through benefit
Waterpipe carries out CRTS III type track plates (13) surface moisturizing；
Step 11：Put and open and be stripped, reach 48MPa in concrete strength, modulus of elasticity is not less than 3.4 × 104MPa, CRTS
When III type track plates (13) surface temperature is less than 15 DEG C with ambient temperature differences, is put and opened using tensioning digital control system progress prestressing force,
The connecting bolt (9a) that tension rod (8) and side form (7) and bed die (9) are removed after the completion of opening is put, and utilizes liftout attachment by side form
(7) bed die (9) is slowly lifted off, the separation of side form (7) and the type track plates (13) of CRTS III is completed on dismounting platform (14)；
Step 12：Sealing off and covering anchorage, the spraying interfacial agents in the prestressed pore passage (13a) of the type track plates (13) of CRTS III, using pneumatic
Anchor rifle carries out sealing off and covering anchorage mortar injection, is vibrated after the completion of perfusion using pneumatic hammer；
Step 13：Conserved in water, the type track plates (13) of CRTS III that sealing off and covering anchorage is completed are placed in into Shui Yang areas (16) enters in water-filling to support
Shield；
Step 14：Standing is dried, and the water in the independent pond (16a) that will deposit the foster three days track plates of water is drained, and starts steam
System (17) stand and air-dried, until the type track plate surface water stain-frees of CRTS III；
Step 15：Sealing compound is sprayed, service sleeve hole (13b) is blocked using vinyl cover, and start sealing compound
Spraying；
Step 10 six：Buffer area is deposited, and the type track plates (13) of CRTS III for having sprayed sealing compound are transported into buffer area and deposited；
Step 10 seven：Deposited in, when the type track plates surface temperature differences of CRTS III are not more than 15 DEG C with circumstance of temperature difference, utilize track
Plate transport vehicle (18) deposits track plate transporting to Cun Ban areas.
2. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In, the reinforced mesh described in step 2 making specifically, colligation bottom layer of the reinforcing steel first, colligation to 1/2 opening position, rotates reinforcing bar
Binding clamping fixture, remaining bottom layer of the reinforcing steel colligation is completed, secondly cableway is installed, last colligation top layer reinforcing bar and side reinforcing bar, tied up
Stirrup is vertical with cage bar during bundle, and for intersection point point by point using insulation tied silk colligation, lashing location is Insulating heat shrink center.
3. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In initial tensioning described in step 8 carries out initial tensioning using 2 initial tensioning dollies (12), and one is arranged on the horizontal fixing end of stretching bed seat
(13), one is arranged on vertical fixing end (14), and the 30% of single tendon stretch presstressed reinforcing steel to tension control values, deviation is less than 3.0KN.
4. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In whole tensioning described in step 8 drives stretch-drawing beam, tensioning longeron to carry out by controlling jack, and whole tensioning is read with stretching force
Based on number, Extension Values of Prestress Reinforcements is checked, and is stretched to controlling value by operating the control of automatic Tensioning system and is kept stretching force
It is stable, after the completion of whole tensioning, lock mechanical lock.
5. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In the concreting described in step 9 is specifically, the hopper that discharged by blending station feed opening to concrete carries out feeding, utilization
Concrete transportation track transports concrete discharging hopper to transporting above grey dolly, is hung with purlin concrete transportation hopper hanging in cloth
Material machine, and start cloth.
6. according to claim 5 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In three layers of the cloth point is uniform, disperses to carry out:
First layer cloth 10cm is thick, is vibrated by frequency 100hz, frequency 110hz, frequency 90hz, each stage vibrating time
Respectively 20s, 40s, 20s；
Second layer cloth 8cm is thick, and is vibrated by frequency 100hz, frequency 110hz, frequency 90hz, each stage vibrating time
Respectively 20s, 40s, 20s；
Third layer cloth 2cm is thick, and vibrate 30s, frequency 100hz.
7. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In steam curing process described in step 10 is divided into standing, heating, constant temperature, cooling four-stage, and the steam curing stage is per half
Individual hour carries out a moisturizing, and hole for water spraying direction nebulizes injection towards track plate bottom, and the moisturizing time is 7s.
8. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In the interfacial agents carry out sealing off and covering anchorage, recessed type track plates (13) the side 0-4mm of CRTS III of sealing off and covering anchorage depth after the completion of spraying.
9. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In curing time is after the type track plates (13) of CRTS III are stripped within 4h, sealing off and covering anchorage completes 2h in water described in step 13, the water
Middle curing time is 3 days, and for water temperature not less than 10 DEG C, the difference of track plates surface temperature and water temperature is less than 10 DEG C.
10. according to claim 1 exist in the plate-type non-fragment orbit precast construction methods of severe cold area CRTS III, its feature
In, described in step 10 seven in field storage specifically, with track plate transport vehicle (18) by the type track plates (13) of CRTS III from buffer area
Storage area in field is transported to, is deposited by the way of vertically standing up, the type track plates (13) of CRTS III use connecting plate and company when standing up
Connecting bolt or limiting card connect the adjacent type track plates (13) of two pieces of CRTS III, track plates is connected into an entirety, CRTS III
Type track plates (13) storage termination is provided with overturning-preventing support frame, and first piece of type track plates (13) of CRTS III is connected on support frame,
Tarpaulin insulation is covered after the completion of storage.
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| CN113910445A (en) * | 2021-09-26 | 2022-01-11 | 中铁九局集团有限公司 | High-speed railway pre-tensioned track slab production system and production method thereof |
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Inventor after: Liu Hui Inventor after: Liao Fuhua Inventor after: Jiang Chengming Inventor after: Li Huiming Inventor after: Lin Tao Inventor after: Sun Kunpeng Inventor after: Yuan Jiangbin Inventor after: Yang Leming Inventor after: Liu Wusheng Inventor after: Hu Zhukui Inventor after: Liu Yubo Inventor after: Zhu Liangliang Inventor after: Xu Lu Inventor after: Chen Ning Inventor before: Yuan Jiangbin Inventor before: Jiang Chengming Inventor before: Li Huiming Inventor before: Lin Tao Inventor before: Sun Kunpeng Inventor before: Yang Leming Inventor before: Liu Wusheng Inventor before: Hu Zhukui Inventor before: Liu Yubo Inventor before: Zhu Liangliang Inventor before: Xu Lu Inventor before: Chen Ning Inventor before: Liao Fuhua |
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Application publication date: 20171212 |