CN102371624A - Method for tensioning pre-stressed reinforcement of ballast-less transition sleeper of ballast-less track - Google Patents
Method for tensioning pre-stressed reinforcement of ballast-less transition sleeper of ballast-less track Download PDFInfo
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- CN102371624A CN102371624A CN2011102333284A CN201110233328A CN102371624A CN 102371624 A CN102371624 A CN 102371624A CN 2011102333284 A CN2011102333284 A CN 2011102333284A CN 201110233328 A CN201110233328 A CN 201110233328A CN 102371624 A CN102371624 A CN 102371624A
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Abstract
The invention discloses a method for tensioning pre-stressed reinforcement of a ballast-less transition sleeper of a ballast-less track. The method comprises the following steps of: spraying releasing agent in a cleaned steel mould shell, installing a pre-embedded casing pipe, and respectively inserting end baffles in two ends of a steel mould; threading the pre-stressed reinforcement through the end baffle at one end of the steel mould and an end plate, threading out through the end plate at the other end of the steel mould and the end baffle, taking one end of the steel mould as a tensioning end, and taking the other end of the steel mould as a fixed end; respectively installing an anchorage device and a clamping sheet at two ends of the pre-stressed reinforcement, tensioning the pre-stressed reinforcement one by one at the tensioning end through a through jack; and filling concrete in the steel mould, densely vibrating, and releasing ballast-less transition sleepers one by one after carrying out steam maintenance. According to the method disclosed by the invention, the method is simple for operation and accurate for control; technical requirements are satisfied; the tensioning working efficiency can be increased; the labour intensity of workers can be lightened; materials can be saved; and the cost is reduced.
Description
Technical field
The present invention relates to the special line for passenger trains non-fragment orbit does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow, particularly relates to the method for stretching that a kind of non-fragment orbit does not have tiny fragments of stone, coal, etc. transition pillow deformed bar.
Background technology
At present, most of 2 * 5 punching blocks that adopt of the production of China railways prestressed reinforced concrete tie adopt heading and link plate combined type stretch-draw form to deformed bar; Implement continuous, integral tension deformed bar; In this case, require tensioning equipment that higher pressure and bigger tonnage are arranged, the input cost of tensioning equipment is bigger; And the leakage of oil of stretching construction process high-tension apparatus is serious, and there is environmental pollution in working face.Deformed bar is taked the fixed length blanking,,, be mounted to and carry out integral tension in the punching block again with deformed bar two ends heading by after root penetrates link plate with deformed bar.Integral tension requires to have the heading profile of higher deformed bar blanking sum of errors than standard; Excessive like error in deformed bar length and the heading operation, the phenomenon of stripped thread and fracture of wire will take place in the stretching process, must draw out putting in order the group deformed bar in case the problems referred to above occur; Change the deformed bar group; The integral tension working efficiency is lower, and labor strength is higher, and waste of material is excessive.
Summary of the invention
The objective of the invention is in order to overcome the deficiency of above-mentioned background technology, the method for stretching that provides a kind of non-fragment orbit not have tiny fragments of stone, coal, etc. transition pillow deformed bar, simple to operate; Specification requirement is satisfied in precise control, can improve the stretch-draw working efficiency; Alleviate labor strength, save material, reduce cost.
Non-fragment orbit provided by the invention does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, may further comprise the steps: A, give spraying releasing agent in the punching block housing of cleaning out, service sleeve is installed, the two ends of end-stopping plate being inserted punching block respectively; B, end-stopping plate and the end plate of deformed bar through punching block one end penetrated, pass from the end plate and the end-stopping plate of the punching block other end, as the stretch-draw end, the other end is as stiff end with an end of punching block; C, the two ends of deformed bar are loaded onto ground tackle and intermediate plate respectively, carry out stretch-draw through punching jack pair deformed bar by root at said stretch-draw end; D, in punching block concrete perfusion, and vibration compacting, carry out steam curing after, by root no tiny fragments of stone, coal, etc. transition pillow is put again.
In technique scheme, when adorning ground tackle and intermediate plate among the step C, the stretch-draw end is reserved the active length that is no less than 30cm, and stiff end is reserved the anchorage length that is no less than 2cm.
In technique scheme, steam curing to concrete strength reaches 40Mpa among the step D.
In technique scheme, said end-stopping plate is close to the end of punching block housing through housing pin chucking steel bar girder.
In technique scheme, said deformed bar is through location, the hole on end-stopping plate and the end plate.
In technique scheme, said intermediate plate adopts the two-piece type intermediate plate, and ground tackle and intermediate plate install the end plate of back near punching block.
In technique scheme, among the step C during stretch-draw, held lotus 1 minute after being stretched to stretching force F, mend and open to stretching force F, stretching force F=P * 0.7 * S, wherein, P designs tensile strength for compressor wire, and S is the compressor wire sectional area.
In technique scheme, among the step C during stretch-draw, according to by in the middle of the punching block to the tension sequence of both sides, carry out stretch-draw by the root symmetry.
In technique scheme, during stretch-draw, the loading velocity of setting is not more than 30KN/S among the step C.
In technique scheme, among the step D, after maintenance finishes, according to by punching block laterally in the middle of to the order of both sides, by the root symmetry no tiny fragments of stone, coal, etc. transition pillow is put.
The employed no tiny fragments of stone, coal, etc. transition pillow of China railways Line for Passenger Transportation non-fragment orbit is to cooperate double-block type sleeper to use, and sleeper has the part steel bar girder exposed outside, be transported to the job site after, carry out secondary pouring.Double-block type sleeper is the armored concrete pillow, does not have deformed bar, need not carry out prestressed stretch-draw, and production line does not have integral tension equipment.For production line and the production technology of taking into account double-block type sleeper, adopt 1 * 4 punching block during the punching block pattern design of transition pillow, select the mode of single tendon stretch for use, guarantee the product needed of transition pillow.The intermediate plate anchor is adopted in the anchoring of reinforcing bar, and it is convenient mode that the intermediate plate anchor applies prestressing force to single deformed bar.Therefore, on the double-block type sleeper production line, produce no tiny fragments of stone, coal, etc. transition pillow, consider equipment cost and operability, use method of the present invention that deformed bar is carried out stretch-draw; Not only simple to operate, precise control can improve the stretch-draw working efficiency; Alleviate labor strength, and less equipment investment, after ground tackle and intermediate plate withdraw from; Can reuse, save material, reduce cost.
Punching block of the present invention has following three big advantages:
1, for adapting to short mould production line (1 * 4), the stiff end of punching block and stretch-draw end are separately positioned on the front and back crossbeam of punching block, are transition pillow and the general The pipeline design of double-block type sleeper to be applicable to this.
2, utilize this punching block, the stretching force of transition pillow deformed bar passes on the reinforcing bar through two end carriages, has realized within required stretching force, guarantees prestressedly not lose.
3, the project organization of this punching block is compact, and conserve space do not need both to be adapted to the double-block type sleeper production of stretch-draw, also is adapted to carry out the transition pillow production of stretch-draw, and need not increases the stretch-draw facility, can realize.Other has alleviated punching block weight, has saved material cost.
Description of drawings
Fig. 1 is the front view of no tiny fragments of stone, coal, etc. transition pillow punching block;
Fig. 2 is the half sectional view of no tiny fragments of stone, coal, etc. transition pillow punching block;
Fig. 3 is the half side view of no tiny fragments of stone, coal, etc. transition pillow punching block;
Fig. 4 is the front view of truss geometrical clamp;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the vertical view of ground tackle;
Fig. 7 is the longitudinal cross-section sketch map of ground tackle;
Fig. 8 is the vertical view of two-piece type intermediate plate;
Fig. 9 is the longitudinal cross-section sketch map of two-piece type intermediate plate;
Figure 10 is the technological process of production figure of no tiny fragments of stone, coal, etc. transition pillow.
Among the figure: the 1-hanging axis, the 2-end plate, the 3-base plate, the 4-supporting plate, 5-punching block housing, 6-iron baffle plate holder, 7-connects channel-section steel, 8-stringer board, 9-gusset, 10-reinforcing bar location-plate, 11-bar chair, 12-cover plate, 13-end-stopping plate, 14-truss geometrical clamp, 15-housing pin.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is made further detailed description.
Extremely shown in Figure 3 referring to Fig. 1; No tiny fragments of stone, coal, etc. transition pillow punching block in the embodiment of the invention specifically comprises: hanging axis 1, end plate 2, base plate 3, supporting plate 4, punching block housing 5, iron baffle plate holder 6, connection channel-section steel 7, stringer board 8, gusset 9, reinforcing bar location-plate 10, bar chair 11, cover plate 12, end-stopping plate 13, truss geometrical clamp 14 and housing pin 15; Wherein, the stringer board 8 of punching block, end plate 2 and base plate 3 form 1 * 4 punching block frame structure, and be peripheral by base plate 3 and end plate 2 parcels; Punching block housing 5 bottoms link to each other with stringer board 8 through connecting channel-section steel 7; Top links to each other with stringer board 8 through cover plate 12, and punching block housing 5 two ends are provided with gusset 9, prevents 5 distortion of punching block housing.The end of punching block is provided with 4 hanging axises 1, overturns when the convenient lifting and the punching block demoulding.Bar chair 11 and reinforcing bar location-plate 10 cooperate the use of truss geometrical clamps 14, fix the position of steel bar girder, and the structure of truss geometrical clamp 14 is referring to Fig. 4 and shown in Figure 5, and supporting plate 4 is used for tangling truss geometrical clamp 14.End-stopping plate 13, iron baffle plate holder 6 cooperates the use of housing pins 15, fixes to run through the sleeper position of regular reinforcement and deformed bar longitudinally.The accessory of punching block comprises: location pin, end-stopping plate 13, truss geometrical clamp 14 and housing pin 15.No tiny fragments of stone, coal, etc. transition pillow punching block integral solder forms.
The non-fragment orbit that the embodiment of the invention provides does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, may further comprise the steps:
A, give the punching block housing clean out 5 spraying releasing agents, service sleeve is installed, the two ends of end-stopping plate 13 being inserted punching block respectively;
B, end-stopping plate 13 and the end plate 2 of deformed bar through punching block one end penetrated, pass from the end plate 2 and the end-stopping plate 13 of the punching block other end, as the stretch-draw end, the other end is as stiff end with an end of punching block;
C, the two ends of deformed bar are loaded onto ground tackle and intermediate plate respectively, carry out stretch-draw through punching jack pair deformed bar by root at said stretch-draw end;
D, in punching block concrete perfusion, and vibration compacting, carry out steam curing after, by root no tiny fragments of stone, coal, etc. transition pillow is put again.
In the practical implementation process, note following item:
A, end-stopping plate 13 are close to the end of punching block housing 5 through housing pin 15 chucking steel bar girders; Deformed bar is located through end-stopping plate 13 and the hole on the end plate 2.
When adorning ground tackle and intermediate plate among b, the step C, the stretch-draw end is reserved the active length that is no less than 30cm, and stiff end is reserved the anchorage length that is no less than 2cm.The structure of ground tackle is referring to Fig. 6 and shown in Figure 7, and intermediate plate adopts the two-piece type intermediate plate, and structure is referring to Fig. 8 and shown in Figure 9, and is easy to loading and unloading, and after stiff end and stretch-draw end installed, ground tackle and intermediate plate should abut against on the punching block end plate, and the intermediate plate exposed junction should be smooth.
Among c, the step C during stretch-draw, held lotus 1 minute after being stretched to stretching force F, mend and open to stretching force F, stretching force F=P * 0.7 * S,, reserving 30% masterpiece is safety stock, and wherein, P designs tensile strength for compressor wire, and S is the compressor wire sectional area.During stretch-draw,, carry out stretch-draw by the root symmetry according to by the middle tension sequence of punching block to both sides; During stretch-draw, the loading velocity of setting is not more than 30KN/S.
Among d, the step D, steam curing to concrete strength reaches 40Mpa; After maintenance finishes, according to by punching block laterally in the middle of to the order of both sides, by the root symmetry no tiny fragments of stone, coal, etc. transition pillow is put.
The concrete method for using step of no tiny fragments of stone, coal, etc. transition pillow punching block is following in the embodiment of the invention:
(1) punching block after the demoulding earlier through clear mould platform position, is removed the concrete on the housing with abrasive machine in clear mould platform position, and is blown clean the concrete bits with air gun;
(2) get into releasing agent spraying platform position then, on punching block housing 5, evenly spray one deck releasing agent;
(3) again punching block is hung releasing agent spraying platform position, be placed on smooth ground, will locate pin and be installed on the punching block, the pin bottom is closely connected with punching block housing 5, and coating butter on the pin is spun on service sleeve on the pin of location, and sleeve pipe top and punching block housing are closely connected;
(4) put into end-stopping plate 13 at the punching block two ends, penetrate regular reinforcement and deformed bar, housing pin 15 is fixed the muscle position of regular reinforcement and deformed bar through screwing;
(5) the adjustment deformed bar guarantees the active length of stiff end and stretch-draw end in the length of punching block outboard end, penetrates intermediate plate and ground tackle at the deformed bar two ends, and ground tackle is attached to the punching block lateral wall near a side of punching block, and the intermediate plate end is equal basically;
(6) steel bar girder is put into punching block, termination lower edge muscle is put into the notch of bar chair, withstands the truss location-plate; The truss geometrical clamp 14 of packing into; The bottom of truss geometrical clamp 14 is stuck in the notch of supporting plate 4, lifts the working plate on truss geometrical clamp 14 tops, working plate is put on the lower edge muscle of steel bar girder; Utilize the elastic compression steel bar girder of spring, in order to avoid truss is collected together up and down in the perfusion vibration processes;
(7) according to the layout of drawing stirrup, load onto stirrup, and screw on corresponding spiral bar according to the model of sleeve pipe;
(8) the punching jack is enclosed within the reinforcing work end, the stretch-draw to both sides by the root symmetry by the deformed bar in the middle of the punching block;
(9) punching block is winched to fortune mould roller-way, be transported to shake table and carry out concrete distributing, behind the vibratory compaction, deliver into the maintenance passage and carry out steam curing;
(10) after maintenance finishes, according to by in the middle of the punching block to the order of both sides, by the root symmetry no tiny fragments of stone, coal, etc. transition pillow is put;
(11) unclamp housing pin 15, take off truss geometrical clamp 14, winch to the position demoulding of demoulding platform;
(12) after sleeper is deviate from, rap end-stopping plate 13 with iron hammer, end-stopping plate 13 is separated with sleeper, the concrete bits with in the air gun cleaning service sleeve cover casing cover, and piling is transported to storage pad.
Changeover portion sleeper model in the embodiment of the invention adopts 1 * 4 general frame structure; Has enough intensity and stability; It is correct to have guaranteed that whole position physical dimension is rested the head in transition, and has the rigidity that can repeatedly use the unlikely pillow profile that exerts an influence repeatedly.The manufacturing allowable tolerance of punching block is 1/2 of a sleeper finished product allowable tolerance.Punching block sprays releasing agent, the same curing temperature of preheat temperature after preheating.The technological process of production of no tiny fragments of stone, coal, etc. transition pillow punching block, referring to shown in Figure 10, process kit comprises: collar supports bar (alignment pin), truss geometrical clamp 14 and retaining slurry folder beam.
In the embodiment of the invention, during tension of prestressed tendon, adopt ZB4-500 type electric oil pump, the stretch-draw precision is 1 grade.YDCQ75-150 type oil top is adopted on stretch-draw oil top.Anchor clamps adopt GSM-1 type single hole moveable anchor.The oil pump technical performance is following: maximum pull 75.1KN, piston area 1669mm
2Stretch-draw oil top should be proofreaied and correct once when using one month, and the oil top after newly buying or repairing should be proofreaied and correct, and correction coefficient should be greater than 1.05.The prestressed stretch-draw program of individual wire is following:
The loading velocity of setting during stretch-draw must not be greater than 30KN/S, and the prestressing force of steel wire is following:
Changeover portion is rested the head on single presstressed reinforcing steel: stretching force P=42.27KN; The reading of stretch-draw oil meter is 25.33MPa.Changeover portion pillow presstressed reinforcing steel does not allow fracture of wire and stripped thread, as finding fracture of wire and stripped thread, should mend stretch-draw again behind the silk.
In the embodiment of the invention, the process that retaining slurry folder is installed is: truss bars is fixed on the punching block back retaining slurry folder is installed, and towards the inside of mould housing, curved side is towards the end of mould with its flat side.Should check in time after installing whether each accessory is complete.
In the embodiment of the invention, put and open, should note during the demoulding:
Concrete demoulding intensity should be not less than 40Mpa, assigns demoulding advice note by laboratory, can carry out stripping operation.When overhead crane winches to the steam-cured punching block that finishes on the demoulding roller-way, can adopt the electric welding cutting that deformed bar is loosened.To revolve with the fixture of spring and turn 90 degrees, the both sides turning-over moves simultaneously, and punching block is clamped by the steady pin of both sides, and punching block is lifted and turned over turnback to the extreme higher position, and punching block reduces the locating shaft of placing behind the demoulding position service sleeve and unloads, and carries out the demoulding again.The changeover portion sleeper that has taken off mould transfers to storage pad through loop wheel machine.Travelling bogie returns under the ingot stripper, the punching block behind the disengaging sleeper is transported back the punching block assembly section of circular line.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
The content of not doing in this specification to describe in detail belongs to this area professional and technical personnel's known prior art.
Claims (10)
1. a non-fragment orbit does not have the method for stretching that deformed bar is rested the head in tiny fragments of stone, coal, etc. transition, it is characterized in that, may further comprise the steps:
A, give spraying releasing agent in the punching block housing (5) clean out, service sleeve is installed, the two ends that end-stopping plate (13) is inserted punching block respectively;
B, end-stopping plate (13) and the end plate (2) of deformed bar through punching block one end penetrated, pass from the end plate (2) and the end-stopping plate (13) of the punching block other end, as the stretch-draw end, the other end is as stiff end with an end of punching block;
C, the two ends of deformed bar are loaded onto ground tackle and intermediate plate respectively, carry out stretch-draw through punching jack pair deformed bar by root at said stretch-draw end;
D, in punching block concrete perfusion, and vibration compacting, carry out steam curing after, by root no tiny fragments of stone, coal, etc. transition pillow is put again.
2. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, when adorning ground tackle and intermediate plate among the step C, the stretch-draw end is reserved the active length that is no less than 30cm, and stiff end is reserved the anchorage length that is no less than 2cm.
3. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that steam curing to concrete strength reaches 40Mpa among the step D.
4. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, said end-stopping plate (13) is close to the end of punching block housing (5) through housing pin (15) chucking steel bar girder.
5. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, said deformed bar is through location, the hole on end-stopping plate (13) and the end plate (2).
6. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, said intermediate plate adopts the two-piece type intermediate plate, and ground tackle and intermediate plate install the end plate (2) of back near punching block.
7. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, among the step C during stretch-draw; Held lotus 1 minute after being stretched to stretching force F; Mend and open to stretching force F, stretching force F=P * 0.7 * S, wherein; P designs tensile strength for compressor wire, and S is the compressor wire sectional area.
8. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, among the step C during stretch-draw, according to by in the middle of the punching block to the tension sequence of both sides, carry out stretch-draw by the root symmetry.
9. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, during stretch-draw, the loading velocity of setting is not more than 30KN/S among the step C.
10. non-fragment orbit as claimed in claim 1 does not have the method for stretching of tiny fragments of stone, coal, etc. transition pillow deformed bar, it is characterized in that, among the step D, after maintenance finishes, according to by punching block laterally in the middle of to the order of both sides, by the root symmetry no tiny fragments of stone, coal, etc. transition pillow is put.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110233328 CN102371624B (en) | 2011-08-15 | 2011-08-15 | Method for tensioning pre-stressed reinforcement of ballast-less transition sleeper of ballast-less track |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110233328 CN102371624B (en) | 2011-08-15 | 2011-08-15 | Method for tensioning pre-stressed reinforcement of ballast-less transition sleeper of ballast-less track |
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| CN102371624A true CN102371624A (en) | 2012-03-14 |
| CN102371624B CN102371624B (en) | 2013-12-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104589494A (en) * | 2014-11-28 | 2015-05-06 | 中铁二十三局集团有限公司 | Vibration method for pre-tensioning prefabricated track boards |
| CN104669433A (en) * | 2013-12-03 | 2015-06-03 | 天津中金博奥重工机械有限责任公司 | Mechanical pushing device |
| CN106476125A (en) * | 2016-12-06 | 2017-03-08 | 汝州郑铁三佳水泥制品有限公司 | A kind of method for producing at a high speed the no model of tiny fragments of stone, coal, etc. railway switch tie and its production switch tie |
| CN108193773A (en) * | 2018-01-03 | 2018-06-22 | 鲲鳌建设有限公司 | A kind of steel-shelled reinforced concrete structural member and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104669433A (en) * | 2013-12-03 | 2015-06-03 | 天津中金博奥重工机械有限责任公司 | Mechanical pushing device |
| CN104589494A (en) * | 2014-11-28 | 2015-05-06 | 中铁二十三局集团有限公司 | Vibration method for pre-tensioning prefabricated track boards |
| CN106476125A (en) * | 2016-12-06 | 2017-03-08 | 汝州郑铁三佳水泥制品有限公司 | A kind of method for producing at a high speed the no model of tiny fragments of stone, coal, etc. railway switch tie and its production switch tie |
| CN108193773A (en) * | 2018-01-03 | 2018-06-22 | 鲲鳌建设有限公司 | A kind of steel-shelled reinforced concrete structural member and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102371624B (en) | 2013-12-18 |
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